Gas sensor device

Abstract

SOLUTION: In a gas sensor system, a first gas sensor device includes a transmission section that transmits first calibration information for calibrating gas concentration of a measuring object calculated on the basis of, output of the first gas sensor, and in the first gas sensor device, the transmission section transmits the first calibration information and reliability information indicating the calibration reliability of the first gas sensor device, and a second gas sensor device includes a reception section that receives the first calibration information and the reliability information transmitted by the transmission section and a calibration section that calibrates the gas concentration of the measuring object calculated on the basis of, output of the second gas sensor on the basis of the first calibration information received by the reception section, and the calibration section calibrates the gas concentration of the measuring object calculated on the basis of, the output of the second gas sensor on the basis of the received first calibration information when the calibration reliability of the first gas sensor device received by the reception section is higher than reference calibration reliability.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a gas sensor system, a gas sensor calibration method, and a gas sensor calibration program.

Background Art

[0002] Patent Document 1 describes that "an accurate carbon dioxide concentration measurement system is provided" (abstract). [Prior Art Documents] [Patent Documents] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-228518

Summary of the Invention

[0003] In a first aspect of the present invention, a gas sensor system is provided. The gas sensor system is a first gas sensor device having a transmission unit that transmits first calibration information for calibrating the gas concentration of a measurement target calculated based on the output of a first gas sensor, and the transmission unit transmits the first calibration information and reliability information indicating the calibration reliability of the first gas sensor device. A first gas sensor device, a reception unit that receives the first calibration information and the reliability information transmitted by the transmission unit, and a calibration unit that calibrates the gas concentration of the measurement target calculated based on the output of a second gas sensor based on the first calibration information received by the reception unit. The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information when the calibration reliability of the first gas sensor device received by the reception unit is higher than the reference calibration reliability.

[0004] The second gas sensor device may further include a storage unit that stores reference reliability information indicating the reference calibration reliability. When the calibration reliability of the first gas sensor device received by the reception unit is higher than the reference calibration reliability, the storage unit may update the reference calibration reliability based on the calibration reliability of the first gas sensor device received by the reception unit.

[0005] The measurement target for which the gas concentration is calculated based on the output of the first gas sensor and the measurement target for which the gas concentration is calculated based on the output of the second gas sensor may be the same.

[0006] The first gas sensor device may include a first gas sensor. The first gas sensor device may be a mobile terminal.

[0007] The second gas sensor device may be disposed in the internal space in the measurement target for which the gas concentration is calculated based on the output of the second gas sensor.

[0008] The second gas sensor device may include a second gas sensor. The second gas sensor device may be a mobile terminal.

[0009] When the reliability of the self-calibration of the second gas sensor device is equal to or lower than a predetermined second threshold value and the calibration reliability of the first gas sensor device exceeds the first threshold value, the calibration unit may calibrate the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information.

[0010] The second gas sensor device may further include a position information acquisition unit that acquires the position information of the second gas sensor device. The reliability information may include the position information of the first gas sensor device. The calibration unit may calibrate the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information according to the distance between the position of the first gas sensor device and the position of the second gas sensor device acquired by the position information acquisition unit.

[0011] The gas sensor system may include a plurality of first gas sensor devices. The reception unit may receive the first calibration information and the reliability information in each of the plurality of first gas sensor devices. The calibration unit may weight the calibration reliability of each of the plurality of first gas sensor devices and calibrate the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the weighted calibration reliability.

[0012] The calibration unit may calibrate the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the highest calibration reliability among the respective calibration reliabilities of the plurality of first gas sensor devices.

[0013] In a second aspect of the present invention, a gas sensor calibration method is provided. The gas sensor calibration method includes a transmission step in which a transmission unit transmits first calibration information and reliability information. The first calibration information is calibration information for calibrating the gas concentration of the measurement target calculated based on the output of the first gas sensor, and the reliability information is reliability information indicating the calibration reliability of the first gas sensor device. A reception step in which a reception unit receives the first calibration information and the reliability information transmitted in the transmission step, and a calibration step in which a calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the reception step. The calibration step is a step in which when the calibration reliability of the first gas sensor device received in the reception step is higher than the reference calibration reliability, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information.

[0014] The gas sensor calibration method may further include a storage step in which a storage unit stores the reliability information received in the reception step. The storage step may include an update step in which when the calibration reliability of the first gas sensor device received in the reception step is higher than the reference calibration reliability, the storage unit updates the reference calibration reliability based on the calibration reliability of the first gas sensor device received in the reception step.

[0015] The measurement target for which the gas concentration is calculated based on the output of the first gas sensor and the measurement target for which the gas concentration is calculated based on the output of the second gas sensor may be the same.

[0016] The second gas sensor may be provided in a second gas sensor device. The second gas sensor device may be disposed in the internal space in the measurement target for which the gas concentration is calculated based on the output of the second gas sensor.

[0017] The second gas sensor may be provided in the second gas sensor device. The calibration step may be a step in which, when the reliability of the self-calibration of the second gas sensor device is equal to or lower than a predetermined second threshold value and the calibration reliability of the first gas sensor device exceeds the first threshold value, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the reception step.

[0018] The second gas sensor may be provided in the second gas sensor device. The gas sensor calibration method may further include a position information acquisition step in which the position information acquisition unit acquires the position information of the second gas sensor device. The reliability information may include the position information of the first gas sensor device. The calibration step may be a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information according to the distance between the position of the first gas sensor device and the position of the second gas sensor device acquired in the position information acquisition step.

[0019] The reception step may be a step in which the reception unit receives the first calibration information and the reliability information of each of the plurality of first gas sensor devices. The calibration step may be a step in which the calibration unit weights the calibration reliability of each of the plurality of first gas sensor devices and calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the weighted calibration reliability.

[0020] The calibration step may be a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the highest calibration reliability among the calibration reliabilities of each of the plurality of first gas sensor devices.

[0021] In a third aspect of the present invention, a gas sensor calibration program is provided. The gas sensor calibration program causes a computer to execute the gas sensor calibration method.

[0022] Note that the above summary of the invention does not enumerate all the features of the present invention. Also, sub - combinations of these feature groups can also be inventions.

Brief Description of the Drawings

[0023]

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Embodiments for Carrying Out the Invention

[0024] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential for the solution means of the invention.

[0025] FIG. 1 is a diagram showing an example of calibration of gas concentrations in the first gas sensor device 100 and the second gas sensor device 200 according to one embodiment of the present invention. In this example, the measurement target 501 is outdoors, and the measurement target 502 is indoors.

[0026] In this example, the living body 90 has the first gas sensor device 100. The first gas sensor device 100 may be a portable terminal. The living body 90 is, for example, a human. FIG. 1 shows a situation where the living body 90 having the first gas sensor device 100 moves from the measurement target 501 to the measurement target 502.

[0027] In the measurement target 501, there is a gas 503. The gas 503 is CO2 It may be carbon dioxide gas, CH 4 It may be methane gas or alcohol. A gas sensor 600 for measuring the concentration of the gas 503 in the measurement target 501 may be arranged in the measurement target 501. When the measurement target 501 is outdoors, the gas sensor 600 measures the concentration of the gas 503 in the outdoor air. The gas sensor 600 is, for example, an optical element. The gas sensor 600 may be a gas sensor based on the non-dispersive infrared absorption method (NDIR (Non Dispersive InfraRed)), a gas sensor based on photoacoustic spectroscopy, a gas sensor that detects gas with a solid electrolyte, or a MEMS (Micro Electro Mechanical Systems) gas sensor. The gas detection method by the gas sensor 600 is not particularly limited.

[0028] There is gas 504 in the internal space 508 in the measurement target 502. The gas 504 may be CO 2 It may be carbon dioxide gas, CH 4 It may be methane gas or alcohol. The internal space 508 may be a space isolated from the measurement target 501. The internal space 508 may be a closed space. The internal space 508 is, for example, a room.

[0029] A second gas sensor device 200 is arranged in the measurement target 502. In this example, the second gas sensor device 200 is arranged in the internal space 508. The second gas sensor device 200 may be a mobile terminal.

[0030] The characteristics of the gas sensor 600 may change over time. The characteristics of the gas sensor 600 refer to the characteristics of the optical element and the like when the gas sensor 600 is an optical element and measures the gas concentration with infrared light and is a carbon dioxide sensor. The characteristics of the optical element and the like may change over time. Therefore, it is preferable that the gas sensor 600 be calibrated. The gas sensor 600 is preferably calibrated regularly. 2 When it is a carbon dioxide sensor, it refers to the characteristics of the optical element and the like. The characteristics of the optical element and the like may change over time.

[0031] The gas sensor 600 may be self-calibrated or calibrated by another gas sensor 600. Self-calibration refers to the gas sensor 600 calibrating itself based on the value of the gas concentration calculated by the gas sensor 600. For the calibration of the gas sensor 600 itself, for example, a value of a constant gas concentration over a predetermined period, or the maximum or minimum value of the gas concentration over a predetermined period, etc. may be used. For example, when the gas sensor 600 is a CO 2 (carbon dioxide) sensor, the output of the gas sensor 600 may be self-calibrated by an ABC (Automatic Baseline Correction or Automatic Background Calibration) algorithm.

[0032] When the measurement target 501 is outdoors and the gas sensor 600 is a CO 2 (carbon dioxide) sensor, the output of the gas sensor 600 is such that the CO 2 (carbon dioxide) concentration in the air is calibrated at a timing with a high probability of becoming the reference value of the CO 2 (carbon dioxide) concentration (for example, 400 ppm). The output of the gas sensor 600 is calibrated at that timing so that the CO 2 (carbon dioxide) concentration calculated based on the output of the gas sensor 600 indicates the reference value. That timing is, for example, a time zone (for example, at night) when the activity of the living body 90 is likely to be suppressed.

[0033] The gas sensor 600 may transmit calibration information related to the calibration of the gas sensor 600. Let the calibration information be Ic. The calibration information Ic is calibration information for calibrating the concentration of the gas 503 in the measurement target 501, calculated based on the output of the gas sensor 600. The calibration information Ic is information related to calibration for bringing the concentration of the gas 503 closer to the true value of the concentration. When the gas sensor 600 is a CO 2 (carbon dioxide) sensor, the calibration information Ic is the CO 2 (carbon dioxide) concentration calculated based on the output of the gas sensor 600 at a timing with a high probability of the true value of the CO2 (Carbon dioxide) concentration to indicate the reference value, CO 2 It may be calibration information for calibrating the (carbon dioxide) concentration. The gas sensor 600 may wirelessly transmit the calibration information Ic to the open space in the measurement target 501.

[0034] FIG. 2 is a block diagram showing an example of a gas sensor system 400 according to an embodiment of the present invention. The gas sensor system 400 includes a first gas sensor device 100 and a second gas sensor device 200. The first gas sensor device 100 has a transmission unit 13. The first gas sensor device 100 may have a reception unit 10, a control unit 15, a calibration unit 14, a display unit 12, and an AD conversion unit 114.

[0035] The control unit 15 is, for example, a CPU (Central Processing Unit). The first gas sensor device 100 may be a portable terminal including the CPU. The portable terminal may include a portable computer such as a smartphone or a tablet. The first gas sensor device 100 may be a portable terminal including the CPU, a memory, an interface, and the like.

[0036] The display unit 12 is, for example, a display, a monitor, or the like. When the first gas sensor device 100 is a portable terminal, the display unit 12 may be the display of the portable terminal.

[0037] The first gas sensor device 100 may have a first gas sensor 11. When the first gas sensor device 100 is arranged in the measurement target 501, the first gas sensor 11 measures the concentration of the gas 503 in the measurement target 501. The first gas sensor 11 may be a CO 2 (Carbon dioxide) sensor, may be a CH 4 (Methane) sensor, or may be an alcohol sensor. The first gas sensor 11 may measure the same type of gas 503 (see FIG. 1) as the gas sensor 600 (see FIG. 1). That is, when the gas sensor 600 is a CO 2 (Carbon dioxide) sensor, the first gas sensor 11 is CO 2It may be a carbon dioxide sensor.

[0038] The characteristics of the first gas sensor 11 may change over time. Therefore, it is preferable that the first gas sensor 11 be calibrated. In this example, the receiving unit 10 receives calibration information Ic transmitted by the gas sensor 600. In this example, the calibration unit 14 calibrates the concentration of the gas 503 (see FIG. 1) of the measurement target 501 (see FIG. 1) calculated based on the output of the first gas sensor 11 based on the calibration information Ic. As a result, the measured value of the concentration of the gas 503 by the first gas sensor 11 is likely to become a more accurate value than before calibration. The calibration unit 14 may calibrate the concentration of the gas 503 (see FIG. 1) in a state where the first gas sensor device 100 is arranged on the measurement target 501 (in this example, a state where the living body 90 exists outdoors).

[0039] The AD conversion unit 114 converts the analog signal output of the first gas sensor 11 into a digital signal. The calibration unit 14 may calibrate the concentration of the gas 503 (see FIG. 1) calculated based on the output of the first gas sensor 11 based on the calibration information Ic. That is, the calibration unit 14 may calibrate the calculated concentration of the gas 503 after the concentration of the gas 503 is calculated. The calibration unit 14 may calculate and calibrate the concentration of the gas 503 based on the output of the first gas sensor 11 and the calibration information Ic.

[0040] In this example, the calibration unit 14 includes an arithmetic unit 110 and a storage unit 112. The arithmetic unit 110 calculates the concentration of the gas 503 based on the digital signal of the first gas sensor 11 converted by the AD conversion unit 114. The storage unit 112 stores the concentration of the gas 503 calculated by the arithmetic unit 110. The storage unit 112 may store the correlation between the concentration of the gas 503 calculated by the arithmetic unit 110 and the calibration information Ic. Let the correlation be the correlation Cr. The correlation Cr may be a correlation function or a correlation table.

[0041] The calculation unit 110 may calculate the first calibration information Ic' based on the calibration information Ic received by the receiving unit 10 and the correlation Cr stored in the storage unit 112. The first calibration information Ic' is calibration information for calibrating the concentration of the gas 503 (see FIG. 1) of the measurement target 501 (see FIG. 1) calculated based on the output of the first gas sensor 11. The first calibration information Ic' is information related to calibration for bringing the concentration of the gas 503 (see FIG. 1) closer to the true value of the concentration. The calibration information Ic' may be different from or the same as the calibration information Ic.

[0042] The calculation unit 110 is, for example, a CPU (Central Processing Unit). The calculation unit 110 and the control unit 15 may be a single CPU.

[0043] The transmission unit 13 transmits the first calibration information Ic' of the first gas sensor 11. When the living body 90 (see FIG. 1) stays in the measurement target 501 (see FIG. 1), the transmission unit 13 may transmit the first calibration information Ic' to the open space in the measurement target 501. When the living body 90 moves from the measurement target 501 to the measurement target 502 (see FIG. 1), the transmission unit 13 may transmit the first calibration information Ic' to the internal space 508. The transmission unit 13 may wirelessly transmit the first calibration information Ic'.

[0044] Note that when the first gas sensor device 100 does not have the first gas sensor 11, the first gas sensor device 100 does not necessarily have the AD conversion unit 114. When the first gas sensor device 100 does not have the first gas sensor 11 and the AD conversion unit 114, the analog signal output of the first gas sensor 11 may be converted into a digital signal by an AD conversion unit 114 arranged outside the first gas sensor device 100. The digital signal converted by the AD conversion unit 114 may be transmitted to the first gas sensor device 100. The same applies when the second gas sensor device 200 does not have the second gas sensor 21 (described later).

[0045] The second gas sensor device 200 has a receiving unit 20 and a calibration unit 24. The second gas sensor device 200 may have a control unit 25, a display unit 22, a transmitting unit 23, and an AD conversion unit 124. The functions of the control unit 25, the display unit 22, and the transmitting unit 23 may be the same as those of the control unit 15, the display unit 12, and the transmitting unit 13 in the first gas sensor device 100, respectively.

[0046] The receiving unit 20 receives the first calibration information Ic' transmitted by the transmitting unit 13 of the first gas sensor device 100. The second gas sensor device 200 may have a second gas sensor 21. The calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 1) of the measurement target 502 (see FIG. 1) calculated based on the output of the second gas sensor 21 according to the first calibration information Ic' received by the receiving unit 20. Thereby, the measured value of the concentration of the gas 504 by the second gas sensor 21 is more likely to be an accurate value than before calibration.

[0047] The AD conversion unit 124 converts the analog signal output of the second gas sensor 21 into a digital signal. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 according to the first calibration information Ic'. That is, after the concentration of the gas 504 is calculated, the calibration unit 24 may calibrate the calculated concentration of the gas 504. The calibration unit 24 may calculate and calibrate the concentration of the gas 504 based on the output of the second gas sensor 21 and the first calibration information Ic'.

[0048] As described above, the first calibration information Ic' is calibration information for calibrating the concentration of the gas 503 (see FIG. 1) of the measurement target 501 (see FIG. 1) calculated based on the output of the first gas sensor 11. The calibration unit 14 calibrates the concentration of the gas 503 (see FIG. 1) in a state where the first gas sensor device 100 is arranged on the measurement target 501 (in this example, a state where the living body 90 exists outdoors), and when the first gas sensor device 100 moves from the measurement target 501 to the measurement target 502, the first gas sensor 11 has a high probability of accurately measuring the concentration of the gas 504 in the measurement target 502. Therefore, the calibration unit 24 of the second gas sensor device 200 can more easily and accurately calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21 by using the first calibration information Ic'.

[0049] The gas sensor system 400 may include a storage unit 122. In this example, the second gas sensor device 200 includes the storage unit 122. In this example, the calibration unit 24 includes the calculation unit 120 and the storage unit 122. The functions of the calculation unit 120 and the storage unit 122 may be the same as those of the calculation unit 110 and the storage unit 112 in the calibration unit 14 of the first gas sensor device 100, respectively.

[0050] The storage unit 122 may store the correlation between the concentration of the gas 504 calculated by the calculation unit 120 and the first calibration information Ic'. Let the correlation be the correlation Cr'. The calculation unit 120 may calculate the second calibration information Ic'' based on the first calibration information Ic' received by the reception unit 20 and the correlation Cr' stored in the storage unit 122.

[0051] The second calibration information Ic'' is calibration information for calibrating the concentration of the gas 504 (see FIG. 1) of the measurement target 502 (see FIG. 1) calculated based on the output of the second gas sensor 21. The second calibration information Ic'' is information related to calibration for bringing the concentration of the gas 504 (see FIG. 1) closer to the true value of the concentration. The second calibration information Ic'' may be different from the first calibration information Ic', or may be the same.

[0052] In the gas sensor system 400, the receiving unit 20 receives the first calibration information Ic', and the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'. Thereby, the gas sensor system 400 can calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21.

[0053] When the internal space 508 (see FIG. 1) is an enclosed space isolated from the outdoors, the CO 2 (carbon dioxide) concentration may not reach the above-mentioned reference value (for example, 400 ppm) even during a time period when the activity of the living body 90 is likely to be suppressed (for example, at night). When the CO 2 (carbon dioxide) concentration in the internal space 508 does not reach the reference value, it is difficult for the second gas sensor 21 to self-calibrate the measured concentration of the gas 504 (see FIG. 1).

[0054] In this example, in a state where the first gas sensor device 100 is arranged on the measurement target 501 (in this example, a state where the living body 90 exists outdoors), the concentration of the gas 503 (see FIG. 1) calculated based on the output of the first gas sensor 11 is calibrated by the calibration unit 14. Therefore, when the living body 90 moves from the measurement target 501 (see FIG. 1) to the internal space 508 (see FIG. 1), the first gas sensor device 100 can easily and accurately measure the concentration of the gas 504 in the internal space 508.

[0055] In this example, after the living body 90 moves into the internal space 508, the transmitting unit 13 transmits the first calibration information Ic'. Therefore, even when the second gas sensor device 200 is arranged in an environment where self-calibration is difficult (in this example, the internal space 508), the gas sensor system 400 can calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21. The gas sensor system 400 can calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21 in a state where the second gas sensor device 200 is arranged on the measurement target 502 (see FIG. 1).

[0056] The calibration information Ic may be an indicated value of the concentration of the gas 503 (see FIG. 1) in the measurement target 501 (see FIG. 1). The indicated value of the concentration of the gas 503 may be the concentration of the gas 503 calculated based on the output of the gas sensor 600 (see FIG. 1).

[0057] Let the predetermined distance between the gas sensor 600 and the first gas sensor 11 be the distance dp1. When the distance between the gas sensor 600 and the first gas sensor 11 is less than the distance dp1, there is a high probability that the gas sensor 600 and the first gas sensor 11 are arranged in the same measurement target 501 with the same concentration of the gas 503. For this reason, it is preferable that the concentration of the gas 503 calculated based on the output of the gas sensor 600 and the concentration of the gas 503 calculated based on the output of the first gas sensor 11 match. For this reason, when the distance between the gas sensor 600 and the first gas sensor 11 is less than the distance dp1, the calibration information Ic may be an indicated value of the concentration of the gas 503 in the measurement target 501. The distance dp1 is, for example, 10 m. When the gas sensor 600 and the first gas sensor 11 are arranged in the internal space 508, the distance dp1 may be 5 m.

[0058] The calibration information Ic may also be a calibration amount of the concentration of the gas 503 (see FIG. 1) in the measurement target 501 (see FIG. 1). Let the concentration of the gas 503 calculated based on the output of the gas sensor 600 (see FIG. 1) be the concentration C0. Let the concentration of the gas 503 calculated based on the output of the first gas sensor 11 be the concentration C1. The calibration amount of the concentration of the gas 503 may be the difference between the concentration C0 and the concentration C1.

[0059] When the calibration amount of the concentration of the gas 503 is the difference between the concentration C0 and the concentration C1, the calibration unit 14 may calibrate the output of the gas 503 by the first gas sensor 11 by the amount of the difference. The calibration unit 14 may offset the output of the gas 503 by the first gas sensor 11 by the amount of the difference.

[0060] When it is assumed that the state of the gas sensor 600 is similar to the state of the first gas sensor 11, the calibration information Ic is preferably the calibration amount of the concentration of the gas 503 (see FIG. 1). That the state of the gas sensor 600 is similar to the state of the first gas sensor 11 means, for example, that there is a high probability that the deterioration state of the gas sensor 600 is similar to the deterioration state of the first gas sensor 11. The case where there is a high probability that the deterioration state of the gas sensor 600 is similar to the deterioration state of the first gas sensor 11 means that the most recent calibration time of the gas sensor 600 is the same as the most recent calibration time of the first gas sensor 11, the environment in which the gas sensor 600 is disposed is similar to the environment in which the first gas sensor 11 is disposed, and / or the specifications of the gas sensor 600 are the same as the specifications of the first gas sensor 11. The environment in which the gas sensor 600 is disposed may refer to at least one of the temperature, humidity, and concentration of the gas 503 at the location where the gas sensor 600 is disposed.

[0061] The first calibration information Ic' may be an indicated value of the concentration of the gas 504 (see FIG. 1) in the measurement target 502 (see FIG. 1). The indicated value of the concentration of the gas 504 may be the concentration of the gas 504 calculated based on the output of the first gas sensor 11.

[0062] Let the predetermined distance between the first gas sensor 11 and the second gas sensor 21 be the distance dp2. Similar to the case of the calibration information Ic, when the distance between the first gas sensor 11 and the second gas sensor 21 is less than the distance dp2, the first calibration information Ic' may be an indicated value of the concentration of the gas 504 in the measurement target 502.

[0063] Similar to the case of the calibration information Ic, the first calibration information Ic' may also be the calibration amount of the concentration of the gas 504 (see FIG. 1) in the measurement target 502 (see FIG. 1). When it is assumed that the state of the first gas sensor 11 is similar to the state of the second gas sensor 21, for the same reasons as described above for the case of the calibration information Ic, the first calibration information Ic' is preferably the calibration amount of the concentration of the gas 504.

[0064] Let the concentration of the gas 504 (see Fig. 1) calculated based on the output of the first gas sensor 11 be the concentration C1'. Let the concentration of the gas 504 calculated based on the output of the second gas sensor 21 be the concentration C2. When the calibration amount of the concentration of the gas 504 is the difference between the concentration C1' and the concentration C2, the calibration unit 24 may calibrate the concentration C2 calculated based on the output of the second gas sensor 21 by the amount of the difference.

[0065] The transmitter 23 of the second gas sensor device 200 may transmit the concentration C2 to the first gas sensor device 100. In Fig. 2, the path for transmitting the concentration C2 to the first gas sensor device 100 is indicated by a thick dashed arrow. When the transmitter 23 transmits the concentration C2 to the first gas sensor device 100, the concentration C2 may be the concentration of the gas 504 before being calibrated by the calibration unit 24. The receiver 10 of the first gas sensor device 100 may receive the concentration C2. The arithmetic unit 110 of the first gas sensor device 100 may calculate the difference between the concentration C1' and the concentration C2. The transmitter 13 may transmit the difference to the receiver 20. The calibration unit 24 may calibrate the concentration C2 by the amount of the difference received by the receiver 20.

[0066] The first gas sensor device 100 may be self-calibrated. When the first gas sensor 11 is a CO 2 (carbon dioxide) sensor, the first gas sensor device 100 may be self-calibrated by an ABC (Automatic Baseline Correction or Automatic Background Calibration) algorithm. When the measurement target 501 (see Fig. 1) is an environment where self-calibration is possible (for example, outdoors) and the first gas sensor device 100 is arranged on the measurement target 501, the first gas sensor device 100 may be self-calibrated while being arranged on the measurement target 501. The concentration C2 calculated based on the output of the second gas sensor 21 may be calibrated based on the first calibration information Ic' of the self-calibrated first gas sensor 11.

[0067] The first gas sensor device 100 may or may not include the first gas sensor 11. In this example, the first gas sensor device 100 includes the first gas sensor 11. When the first gas sensor device 100 does not include the first gas sensor 11, the output of the first gas sensor 11 may be transmitted to the concentration correction unit 14. The same applies to the second gas sensor device 200.

[0068] In this example, the measurement target 502 for which the concentration C1' is calculated based on the output of the first gas sensor 11 and the measurement target 502 for which the concentration C2 is calculated based on the output of the second gas sensor 21 are the same. That the measurement target 502 for which the concentration C1' is calculated and the measurement target 502 for which the concentration C2 is calculated are the same may mean that in the measurement target 502, the types of the measurement target gases of the first gas sensor device 100 and the second gas sensor device 200 are the same. The measurement target gases of the first gas sensor device 100 and the second gas sensor device 200 may be CO 2 (carbon dioxide), may be CH 4 (methane), or may be alcohol.

[0069] That the measurement target 502 for which the concentration C1' is calculated and the measurement target 502 for which the concentration C2 is calculated are the same may also mean that the first gas sensor 11 and the second gas sensor 21 share the same space (the internal space 508 (see FIG. 1) in this example). The same space may refer to at least one of the following cases: when the temperature or humidity in the space is the same, when the ID of the short-range wireless (such as wifi (registered trademark), etc.) is the same, and when the first gas sensor device 100 and the second gas sensor device 200 are mobile terminals and the amplitude and frequency of the sound wave acquired by the mobile terminal are the same.

[0070] In the measurement target 502, the type of the measurement target gas for which the concentration C1' is calculated based on the output of the first gas sensor 11 and the type of the measurement target gas for which the concentration C2 is calculated based on the output of the second gas sensor 21 may be different. Let the type of the measurement target gas for which the concentration C1' is calculated based on the output of the first gas sensor 11 be the gas type G1. Let the type of the measurement target gas for which the concentration C2 is calculated based on the output of the second gas sensor 21 be the gas type G2. When the gas type G1 and the gas type G2 are different, the first calibration information Ic' may include information on the gas type G1. The calibration unit 24 may calibrate the concentration of the gas of the gas type G2 calculated based on the output of the second gas sensor based on the first calibration information Ic'.

[0071] Incidentally, when the first gas sensor 11 is disposed in the measurement target 501 and the second gas sensor 21 is disposed in the measurement target 502, the probability that the concentration of the gas 503 in the measurement target 501 is different from the concentration of the gas 504 in the measurement target 502 is high. For this reason, when the first gas sensor 11 is disposed in the measurement target 501 and the second gas sensor 21 is disposed in the measurement target 502, the calibration unit 24 may not calibrate the concentration C2 calculated based on the output of the second gas sensor 21.

[0072] FIG. 3 is a block diagram showing another example of the gas sensor system 400 according to an embodiment of the present invention. Let the calibration reliability of the first gas sensor device 100 be the calibration reliability R1. Let the reliability information indicating the calibration reliability R1 be the reliability information Ir1. The reliability information Ir1 is information indicating the reliability of the calibration performed on the first gas sensor device 100 when the first gas sensor device 100 is calibrated. The reliability information Ir1 may include at least one of information on the elapsed time from the most recent calibration, information on the elapsed time since the first gas sensor 11 was installed, information on the calibration means, information on the diversity of the calibration sources, information on the number of calibrations, information on the calibration frequency, information on the gas concentration at the time of calibration, and environmental information at the time of calibration.

[0073] The calibration reliability R1 is more likely to be higher as the elapsed time from the most recent calibration is shorter. The reliability information Ir1 may be stored in the storage unit 112.

[0074] The information on the calibration means is information on whether the first gas sensor device 100 is self-calibrated or calibrated by another sensor (for example, the gas sensor 600 (see FIG. 1)). When the first gas sensor device 100 is calibrated by another sensor, the information on the calibration means may include at least one of the distance between the first gas sensor and the other sensor and the calibration state of the other sensor. Note that the first gas sensor device 100 may self-calibrate the first gas sensor 11 by the calibration unit 14 calibrating the output of the first gas sensor 11.

[0075] The information on the diversity of the calibration sources may include at least one of the number of calibration source sensors (for example, the gas sensor 600 (see FIG. 1)) of the first gas sensor 11 and the number of specifications of the calibration source sensors. The sensor specification is, for example, the sensor specifications. When the first gas sensor device 100 is self-calibrated, the number of calibration source sensors and the number of specifications of the calibration source sensors may also include the first gas sensor 11. The higher the number of calibration source sensors, the more likely the calibration reliability R1 is to be high. The higher the number of specifications of the calibration source sensors, the more likely the calibration reliability R1 is to be high.

[0076] The information on the number of calibrations is information on the number of times the first gas sensor device 100 has been calibrated from a predetermined past point in time to the present. The number of calibrations may include the case where the first gas sensor device 100 is self-calibrated and the case where it is calibrated by another sensor. The calibration reliability R1 is more likely to be high as the number of calibrations increases.

[0077] The information on the calibration frequency is information on the number of calibrations of the first gas sensor device 100 per predetermined time. The number of calibrations may include the case where the first gas sensor device 100 is self-calibrated and the case where it is calibrated by another sensor. The calibration reliability R1 is more likely to be high as the calibration frequency increases.

[0078] The information on the gas concentration during calibration is the information on the gas concentration when the first gas sensor device 100 is calibrated. When calibrating the first gas sensor device 100, it may include the self-calibration of the first gas sensor device 100 and the calibration by other sensors. When the first gas sensor device 100 is calibrated during the measurement of a gas concentration outside a predetermined range (for example, an abnormal value of the gas concentration), the calibration reliability R1 is likely to be lower than when calibrated during the measurement of the reference value gas concentration.

[0079] The environmental information during calibration may include the temperature, humidity, or atmospheric pressure of the space (for example, the measurement target 501 (see FIG. 1)) where the first gas sensor 11 is disposed when the first gas sensor device 100 is calibrated. When the first gas sensor 11 is calibrated at a temperature (for example, an abnormal value of the temperature), humidity (for example, an abnormal value of the humidity), or atmospheric pressure (for example, an abnormal value of the atmospheric pressure) outside a predetermined range, the calibration reliability R1 is likely to be lower than when calibrated at the reference value temperature, humidity, or atmospheric pressure.

[0080] The transmission unit 13 may further transmit the reliability information Ir1. The reception unit 20 of the second gas sensor device 200 may further receive the reliability information Ir1. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' and the calibration reliability R1 of the first gas sensor device 100. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 according to the reliability information Ir1 based on the first calibration information Ic'.

[0081] Let the calibration reliability of the second gas sensor device 200 be the calibration reliability R2. Let the reliability information indicating the calibration reliability R2 be the reliability information Ir2. The reliability information Ir2 is information indicating the reliability of the calibration performed on the second gas sensor device 200 when the second gas sensor device 200 is calibrated. The reliability information Ir2 may include the same information as the above-described reliability information Ir1. The reliability information Ir2 and the reliability information Ir1 received by the reception unit 20 may be stored in the storage unit 122.

[0082] Let the predetermined threshold of the calibration reliability R1 be the first threshold Rth1. The first threshold Rth1 may be different for each measurement target 501 (see FIG. 1). When the calibration reliability R1 exceeds the first threshold Rth1, the user of the gas sensor system 400 may rely on the concentration of the gas 503 (see FIG. 1) calculated based on the output of the first gas sensor 11.

[0083] Let the predetermined threshold of the calibration reliability R2 be the second threshold Rth2. The second threshold Rth2 may be different for each measurement target 502 (see FIG. 1). When the calibration reliability R2 exceeds the second threshold Rth2, the user of the gas sensor system 400 may rely on the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21. Note that the second threshold Rth2 and the first threshold Rth1 may be the same or different.

[0084] The reliability information Ir2 may include information on the reliability of self - calibration in the second gas sensor device 200. Self - calibration refers to calibration that is not based on other gas sensors (in this example, for example, the first gas sensor device 100). When the second gas sensor 21 is a CO 2 (carbon dioxide) sensor, self - calibration may refer to calibration by the ABC (Automatic Baseline Correction or Automatic Background Calibration) algorithm.

[0085] The information on the reliability of self - calibration in the second gas sensor device 200 may include information on whether the second gas sensor device 200 has a self - calibration function or not. The second gas sensor device 200 may self - calibrate by the calibration unit 24 calibrating the output of the second gas sensor 21.

[0086] When the calibration reliability R1 is equal to or less than the first threshold value Rth1, the calibration unit 24 does not have to calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'. When the calibration reliability R2 of the self-calibration of the second gas sensor device 200 is equal to or less than the second threshold value Rth2 and the calibration reliability R1 exceeds the first threshold value Rth1, the calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'. When the calibration reliability R2 of the self-calibration of the second gas sensor device 200 is equal to or less than the second threshold value Rth2, it may include the case where the second gas sensor device 200 does not have a self-calibration function. When the calibration reliability R2 of the self-calibration of the second gas sensor device 200 is equal to or less than the second threshold value Rth2, it may include the case where self-calibration is difficult due to reasons such as the second gas sensor device 200 being an old sensor device.

[0087] The calibration unit 24 may compare the calibration reliability R1 of the first gas sensor device 100 received by the receiving unit 20 with the calibration reliability R2 of the second gas sensor device 200. The calibration reliability R2 may include the calibration reliability R2 of the self-calibration of the second gas sensor device 200 and the calibration reliability R2 when the second gas sensor device 200 is calibrated by another sensor.

[0088] When the calibration reliability R1 of the first gas sensor device 100 is higher than the calibration reliability R2 of the second gas sensor device 200, the calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received by the receiving unit 20. By calibrating the concentration of the gas 504, the concentration of the gas 504 calculated based on the output of the second gas sensor 21 is likely to be accurate. When the calibration reliability R1 is equal to or less than the calibration reliability R2, the calibration unit 24 does not have to calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21, and may calibrate it based on the second calibration information Ic''.

[0089] When the calibration reliability R2 is less than or equal to the second threshold value Rth2, the transmitter 23 of the second gas sensor device 200 may transmit information requesting the second gas sensor device 200 to transmit calibration information for calibrating the output of the second gas sensor 21 to another gas sensor device (for example, at least one of the gas sensor 600 and the first gas sensor device 100). When the calibration reliability R2 is less than or equal to the second threshold value Rth2, the second gas sensor device 200 may be in a standby state. Thereby, the power consumption of the second gas sensor device 200 is likely to be reduced.

[0090] The calibration reliability R1 of the first gas sensor device 100 received by the receiver 20 may be stored in the storage unit 122. The calibration reliability R1 stored in the storage unit 122 may refer to the past calibration reliability R1 of the first gas sensor device 100. The calibration unit 24 may compare the calibration reliability R1 stored in the storage unit 122 with the current calibration reliability R1 of the first gas sensor device 100 received by the receiver 20. When the current calibration reliability R1 of the first gas sensor device 100 is higher than the calibration reliability R1 of the first gas sensor device 100 stored in the storage unit 122, the calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'.

[0091] Let the calibration reliability serving as a reference for calibrating the concentration of the gas 504 calculated based on the output of the second gas sensor 21 be the reference calibration reliability Cs. Let the reference reliability information indicating the reference calibration reliability Cs be the reference reliability information Irs. The reference calibration reliability Cs may be at least one of the calibration reliability R1 of the first gas sensor device 100 and the calibration reliability R2 of the second gas sensor device 200. When the calibration reliability R1 of the first gas sensor device 100 received by the receiver 20 is higher than the reference calibration reliability Cs, the calibration unit 24 may calibrate the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'.

[0092] The memory unit 122 may store the reference reliability information Cs. When the calibration reliability R1 of the first gas sensor device 100 received by the receiving unit 20 is higher than the reference calibration reliability Cs, the memory unit 122 may update the reference calibration reliability Cs based on the received calibration reliability R1 and store the updated reference calibration reliability Cs. The calibration unit 24 may calibrate the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 according to the updated reference reliability Cs based on the first calibration information Ic'.

[0093] When the calibration reliability R1 of the first gas sensor device 100 received by the receiving unit 20 is higher than the reference calibration reliability Cs, the memory unit 122 may update the reference calibration reliability Cs to the calibration reliability R1 and store the updated reference calibration reliability Cs. When the calibration reliability R1 is lower than the reference calibration reliability Cs, the memory unit 122 may not update the reference calibration reliability Cs.

[0094] The reference reliability information Cs stored in the memory unit 122 may be the reference reliability information Cs updated based on the calibration reliability R1, or may be the calibration reliability R2. The calibration reliability R2 may include the self - calibration reliability R2 of the second gas sensor device 200 and the calibration reliability R2 when the second gas sensor device 200 is calibrated by another sensor.

[0095] FIG. 4 is a block diagram showing another example of the gas sensor system 400 according to an embodiment of the present invention. In the gas sensor system 400 of this example, the first gas sensor device 100 further has a position information acquisition unit 16, and the second gas sensor device 200 further has a position information acquisition unit 26. The gas sensor system 400 of this example is different from the example shown in FIG. 3 in this regard.

[0096] The position information acquisition unit 16 acquires the position information of the first gas sensor device 100. The position information acquisition unit 26 acquires the position information of the second gas sensor device 200. The position information acquisition unit 16 and the position information acquisition unit 26 are, for example, the Global Positioning System (GPS).

[0097] Let the position information of the first gas sensor device 100 be position information Ip1. The reliability information Ir1 may include the position information Ip1. Let the position information of the second gas sensor device 200 be position information Ip2. The reliability information Ir2 may include the position information Ip2.

[0098] Let the distance between the position of the first gas sensor device 100 and the position of the second gas sensor device 200 acquired by the position information acquisition unit 26 be distance d. As described above, the predetermined distance between the position of the first gas sensor 11 and the position of the second gas sensor 21 is distance dp2. The distance dp2 may refer to a distance with a high probability that the first gas sensor 11 and the second gas sensor 21 are arranged in the same space (for example, the internal space 508 in FIG. 1). The same space may refer to the case where the type of the measurement target gas for which the concentration C1' is calculated based on the output of the first gas sensor 11 and the type of the measurement target gas for which the concentration C2 is calculated based on the output of the second gas sensor 21 are the same, or may refer to the case where the ID of the short-range wireless (such as wifi (registered trademark), etc.) in the space where the first gas sensor 11 is arranged and the ID of the short-range wireless in the space where the second gas sensor 21 is arranged are the same.

[0099] The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the distance d and the first calibration information Ic'. When the distance d is less than the distance dp2, the calibration unit 24 may calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21. When the distance d is greater than or equal to the distance dp2, the calibration unit 24 may not calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 according to the distance d based on the first calibration information Ic'.

[0100] Note that the reliability information Ir1 may include information about the user of the first gas sensor device 100. The user information may include a plurality of user names and the past usage history of the first gas sensor device 100 for each user name. The past usage history may include the past usage status. The past usage status is, for example, a situation where a specific user intentionally blows air onto the first gas sensor device 100. The calibration reliability R1 when the first gas sensor device 100 is used by the specific user may be lower than the calibration reliability R1 when it is used by other users. The specific user may be stored as a person to be vigilant in the storage unit 122.

[0101] FIG. 5 is a block diagram showing another example of the gas sensor system 400 according to an embodiment of the present invention. The gas sensor system 400 in this example is different from the gas sensor system 400 shown in FIG. 2 in that it includes a plurality of first gas sensor devices 100 (first gas sensor devices 100-1 to 100-n). In FIG. 5, illustration of the gas 503 in the measurement target 501 and the gas 504 in the measurement target 502 is omitted.

[0102] Each of the first gas sensor devices 100-1 to 100-n may be possessed by each of a plurality of living bodies 90 (living bodies 90-1 to 90-n). The plurality of first gas sensor devices 100 may be moved from the measurement target 501 to the measurement target 502 as the plurality of living bodies 90 move from the measurement target 501 to the measurement target 502.

[0103] In this example, each of the first gas sensor devices 100-1 to 100-n has a receiving unit 10-1 to 10-n, respectively, a calibration unit 14-1 to 14-n, respectively, and a transmitting unit 13-1 to 13-n, respectively. In this example, each of the first gas sensor devices 100-1 to 100-n has a first gas sensor 11-1 to 11-n, respectively. In FIG. 5, the internal configuration of the first gas sensor device 100 is omitted.

[0104] A plurality of gas sensors 600 (gas sensors 600-1 to gas sensors 600-n) may be arranged on the measurement target 501. The gas sensors 600-1 to gas sensors 600-n may each transmit calibration information Ic1 to calibration information Icn. The calibration information Ic1 to calibration information Icn may be different from each other or may be the same.

[0105] The calibration unit 14-1 may calibrate the concentration of the gas 503 (see FIG. 1) of the measurement target 501 calculated based on the output of the first gas sensor 11-1 based on the calibration information Ic1 to calibration information Icn. The calibration unit 14-2 may calibrate the concentration of the gas 503 of the measurement target 501 calculated based on the output of the first gas sensor 11-2 based on the calibration information Ic1 to calibration information Icn. Similarly, the calibration unit 14-n may calibrate the concentration of the gas 503 of the measurement target 501 calculated based on the output of the first gas sensor 11-n based on the calibration information Ic1 to calibration information Icn.

[0106] In this example, the calibration unit 14 of one first gas sensor device 100 calibrates the concentration of the gas 503 (see FIG. 1) calculated based on the output of the first gas sensor 11 of the one first gas sensor device 100 based on a plurality of calibration information Ic. Therefore, the output of the first gas sensor 11 is more likely to be calibrated to an accurate concentration than when it is calibrated based on one calibration information Ic.

[0107] In this example, the calibration units 14-1 to 14-n each include arithmetic units 120-1 to 120-n. The arithmetic units 120-1 to 120-n may each calculate first calibration information Ic'1 to first calibration information Ic'n. The gas concentrations calculated based on the outputs of the first gas sensors 11-1 to 11-n may be calibrated based on the first calibration information Ic'1 to first calibration information Ic'n, respectively.

[0108] The transmission units 13-1 to 13-n may each transmit the first calibration information Ic'1 to the first calibration information Ic'n. When a plurality of living bodies 90 (see FIG. 1) move to the measurement target 502, the transmission units 13-1 to 13-n may each transmit the first calibration information Ic'1 to the first calibration information Ic'n to the internal space 508.

[0109] The receiving unit 20 of the second gas sensor device 200 may receive the first calibration information Ic' for each of the plurality of first gas sensor devices 100. In this example, the receiving unit 20 receives the first calibration information Ic'1 to the first calibration information Ic'n transmitted by each of the transmission units 13-1 to 13-n.

[0110] The calibration unit 24 of the second gas sensor device 200 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the plurality of first calibration information Ic'. In this example, the calibration unit 24 calibrates the concentration of the gas 504 based on the first calibration information Ic'1 to the first calibration information Ic'n. As a result, the output of the second gas sensor 21 is more likely to be calibrated to a more accurate concentration than when calibrated based on one piece of the first calibration information Ic'.

[0111] Let the calibration reliabilities of the first gas sensors 11-1 to 11-n be the calibration reliabilities R11 to R1n, respectively. Let the reliability information indicating the calibration reliabilities R11 to R1n be the reliability information Ir1-1 to Ir1-n, respectively. Each transmission unit 13 (see FIGS. 2 to 4) of the plurality of first gas sensor devices 100 may transmit the reliability information Ir1 of each first gas sensor device 100. In this example, the transmission units 13-1 to 13-n transmit the reliability information Ir1-1 to Ir1-n, respectively.

[0112] The receiving unit 20 of the second gas sensor device 200 may receive reliability information Ir1-1 to Ir1-n. The calibration unit 24 may weight calibration reliabilities R11 to R1n. To weight the calibration reliabilities R11 to R1n means to make the weighting of the calibration reliability R1 with high reliability heavier than the weighting of the calibration reliability R1 with low reliability. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the weighted calibration reliability R1.

[0113] The reliability information Ir1-1 to Ir1-n may be stored in the storage unit 122. The calculation unit 120 may calculate the weighting of the calibration reliabilities R11 to R1n based on the reliability information Ir1-1 to Ir1-n stored in the storage unit 122. The calculation unit 120 may calculate the second calibration information Ic'' by weighting the calibration reliabilities R11 to R1n. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the second calibration information Ic''. Thereby, the concentration of the gas 504 is more likely to be calibrated to an accurate concentration than when calibrated based on the second calibration information Ic'' without weighting the calibration reliabilities R11 to R1n.

[0114] When the reliability information Ir1 in which the calibration reliability R1 of the first gas sensor device 100 is less than the first threshold value Rth1 is included in any of the reliability information Ir1-1 to Ir1-n, the calculation unit 120 may calculate the weighting by eliminating the calibration reliability R1 less than the first threshold value Rth1. For the calculation unit 120 to calculate the weighting by eliminating the calibration reliability R1 may mean that the calculation unit 120 calculates the weighting with the weighting of the calibration reliability R1 being zero.

[0115] The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the highest calibration reliability R1 among the calibration reliabilities R11 to R1n. The calibration unit 24 may calibrate the concentration of the gas 504 by setting the weighting of the highest calibration reliability R1 to 1 and the weightings of the other calibration reliabilities R1 to zero.

[0116] FIG. 6 is a diagram showing an example of gas concentration calibration in the first gas sensor device 100, the second gas sensor device 200, and the third gas sensor device 300 according to one embodiment of the present invention. The third gas sensor device 300 may include a receiving unit 30, a third gas sensor 31, a display unit 32, a transmitting unit 33, a calibration unit 34, and a control unit 35. The block diagram of the third gas sensor device 300 may be the same as the block diagrams of the first gas sensor device 100 and the second gas sensor device 200 shown in FIGS. 2 to 4.

[0117] In this example, the first gas sensor device 100 moves from the measurement target 501 to the measurement target 505. The measurement target 505 may be outdoors or indoors. When the measurement target 505 is outdoors, the gas concentration of the measurement target gas calculated based on the output of the first gas sensor 11 at the measurement target 501 and the gas concentration of the measurement target gas calculated based on the output of the first gas sensor 11 at the measurement target 505 may be the same or different.

[0118] In this example, at the measurement target 505, the transmitting unit 23 of the first gas sensor device 100 transmits the first calibration information Icm. The transmitting units 23 of the first gas sensor devices 100-1 to 100-n may each transmit the first calibration information Icm1 to Icmn, respectively. In this example, at the measurement target 505, the receiving unit 30 of the third gas sensor device 300 receives the first calibration information Icm. The receiving units 30 of the third gas sensor devices 300-1 to 300-n may each receive the first calibration information Icm1 to Icmn, respectively.

[0119] In this example, the calibration unit 34 of the third gas sensor device 300 calibrates the concentration of the gas of the measurement target 505 calculated based on the output of the third gas sensor 31 based on the first calibration information Icm received by the receiving unit 30. The calibration units 34 of the third gas sensor devices 300-1 to 300-n may calibrate the concentration of the gas of the measurement target 505 calculated based on the outputs of the respective third gas sensors 31 of the third gas sensor devices 300-1 to 300-n based on the first calibration information Icm1 to the first calibration information Icmn, respectively.

[0120] In this example, the third gas sensor device 300 with the calibrated concentration of the gas of the measurement target 505 moves from the measurement target 505 to the measurement target 502. In this example, the transmitting unit 33 of the third gas sensor device 300 transmits the calibration information Ic' of the third gas sensor device 300. The transmitting units 33 of the third gas sensor devices 300-1 to 300-n may transmit the calibration information Ic'1 to the calibration information Ic'n, respectively. In this example, the receiving unit 20 of the second gas sensor device 200 receives the calibration information Ic' at the measurement target 502. The receiving unit 20 of the second gas sensor device 200 may receive the calibration information Ic'1 to the calibration information Ic'n.

[0121] In this example, the calibration unit 24 of the second gas sensor device 200 calibrates the concentration of the gas 504 (see FIG. 1) of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the calibration information Ic' received by the receiving unit 20. In this example, the calibration information Ic' reflects a plurality of types of calibration information (calibration information Ic and calibration information Icm). Therefore, the second gas sensor device 200 is more likely to be accurately calibrated than when one type of calibration information is reflected in the calibration information Ic' (for example, in the case of FIG. 5).

[0122] FIG. 7 is a diagram showing an example of calibration of gas concentration in gas sensor device 150 and gas sensor device 250 according to one embodiment of the present invention. Gas sensor device 150 may be the same as the first gas sensor device 100 shown in FIGS. 1 to 6. Gas sensor device 250 may be the same as the second gas sensor device 200 shown in FIGS. 1 to 6.

[0123] FIG. 8 is a block diagram showing an example of gas sensor device 150 and gas sensor device 250 according to one embodiment of the present invention. Gas sensor device 150 may be the same as the first gas sensor device 100 shown in FIG. 4. Gas sensor device 250 may be the same as the second gas sensor device 200 shown in FIG. 4.

[0124] Gas sensor device 150 includes a transmission unit 13. The transmission unit 13 transmits first calibration information Ic' to the second gas sensor device 250. The first calibration information Ic' is calibration information for calibrating the concentration of the gas 503 (see FIG. 1) of the measurement target 501 (see FIG. 7) calculated based on the output of the first gas sensor 11. The first gas sensor device 100 may be self-calibrated or may be calibrated based on another sensor (for example, gas sensor 600 (see FIG. 7)).

[0125] Gas sensor device 250 includes a reception unit 20 and a calibration unit 24. The reception unit 20 receives the first calibration information Ic'. The calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received by the reception unit 20.

[0126] The gas sensor device 150 may or may not include the first gas sensor 11. In this example, the gas sensor device 150 includes the first gas sensor 11. The gas sensor device 250 may or may not include the second gas sensor 21. In this example, the gas sensor device 250 includes the second gas sensor 21. When the gas sensor device 150 is a mobile terminal, the first gas sensor 11 may be provided in the gas sensor device 150. When the gas sensor device 250 is a mobile terminal, the second gas sensor 21 may be provided in the gas sensor device 250.

[0127] When the living body 90 (see FIG. 7) having the first gas sensor device 150 stays at the measurement target 501, the transmitter 13 may transmit the first calibration information Ic' to the open space in the measurement target 501. When the living body 90 moves to the measurement target 502 (see FIG. 1), the transmitter 13 may transmit the first calibration information Ic' to the internal space 508. The transmitter 13 may transmit the first calibration information Ic' wirelessly.

[0128] Similar to the examples shown in FIGS. 1 and 2, the measurement target 502 for which the concentration C1' is calculated based on the output of the first gas sensor 11 and the measurement target 502 for which the concentration C2 is calculated based on the output of the second gas sensor 21 may be the same. That the measurement target 502 for which the concentration C1' is calculated and the measurement target 502 for which the concentration C2 is calculated are the same means, as described above, that in the measurement target 502, the types of the measurement target gases of the first gas sensor device 150 and the second gas sensor device 250 are the same. The measurement target gases of the first gas sensor device 150 and the second gas sensor device 250 may be CO 2 (carbon dioxide), CH 4 (methane), or alcohol.

[0129] As described above, the fact that the measurement target 502 for calculating the concentration C1' and the measurement target 502 for calculating the concentration C2 are the same may mean that the first gas sensor 11 and the second gas sensor 21 share the same space (in this example, the internal space 508 (see FIG. 7)). The same space may refer to at least one of the following cases: when the temperature or humidity in the space is the same, when the ID of short-range wireless (such as wifi (registered trademark), etc.) is the same, and when the gas sensor device 150 and the gas sensor device 250 are mobile terminals and the amplitude and frequency of the sound wave acquired by the mobile terminal are the same.

[0130] The second gas sensor 21 may be disposed in the internal space 508 (see FIG. 7). In this example, the gas sensor device 250 includes the second gas sensor 21, and the gas sensor device 250 is disposed in the internal space 508.

[0131] The transmission unit 13 may transmit the reliability information Ir1 indicating the calibration reliability R1 of the first gas sensor device 150 to the second gas sensor device 250. The reception unit 20 may receive the reliability information Ir1. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' and the calibration reliability R1 of the first gas sensor device 150. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 according to the reliability information Ir1 based on the first calibration information Ic'.

[0132] When the self-calibration reliability of the second gas sensor device 250 is equal to or less than the second threshold value Rth2 and the calibration reliability R1 exceeds the first threshold value Rth1, the calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'. When the self-calibration reliability of the second gas sensor device 250 is equal to or less than the second threshold value Rth2, the case where the second gas sensor device 250 does not have a self-calibration function may be included.

[0133] The calibration unit 24 may compare the calibration reliability R1 of the first gas sensor device 150 received by the receiving unit 20 with the calibration reliability R2 of the second gas sensor device 250. The calibration reliability R2 may include the calibration reliability R2 of the self-calibration of the second gas sensor device 250 and the calibration reliability R2 when the second gas sensor device 250 is calibrated by another sensor.

[0134] When the calibration reliability R1 is higher than the calibration reliability R2, the calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received by the receiving unit 20. When the calibration reliability R1 is higher than the calibration reliability R2, by calibrating the concentration of the gas 504, the concentration of the gas 504 calculated based on the output of the second gas sensor 21 is likely to become accurate. When the calibration reliability R1 is less than or equal to the calibration reliability R2 of, the calibration unit 24 may not calibrate the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21, or may calibrate it based on the second calibration information Ic''. The second calibration information Ic'' is calibration information for calibrating the concentration of the gas 504 (see FIG. 7) of the measurement target 502 (see FIG. 7) calculated based on the output of the second gas sensor 21.

[0135] The gas sensor device 250 may further include a storage unit 122. The calibration reliability R1 of the first gas sensor device 150 received by the receiving unit 20 may be stored in the storage unit 122. The calibration reliability R1 stored in the storage unit 122 may indicate the past calibration reliability of the first gas sensor device 150. The calibration unit 24 may compare the calibration reliability R1 stored in the storage unit 122 with the current calibration reliability R1 of the first gas sensor device 150 received by the receiving unit 20. When the current calibration reliability R1 is higher than the calibration reliability R1 stored in the storage unit 122, the calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'.

[0136] When the calibration reliability R1 of the first gas sensor device 150 received by the receiving unit 20 is higher than the reference calibration reliability Cs, the calibration unit 24 may calibrate the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'. The storage unit 122 may store the reference reliability information Cs. When the calibration reliability R1 of the first gas sensor device 150 received by the receiving unit 20 is higher than the reference calibration reliability Cs, the storage unit 122 may update the reference calibration reliability Cs based on the received calibration reliability R1 and store the updated reference calibration reliability Cs. The calibration unit 24 may calibrate the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' according to the updated reference reliability Cs.

[0137] When the calibration reliability R1 of the first gas sensor device 150 received by the receiving unit 20 is higher than the reference calibration reliability Cs, the storage unit 122 may update the reference calibration reliability Cs to the calibration reliability R1 and store the updated reference calibration reliability Cs. When the calibration reliability R1 is lower than the reference calibration reliability Cs, the storage unit 122 may not update the reference calibration reliability Cs.

[0138] The reference reliability information Cs stored in the storage unit 122 may be the reference reliability information Cs updated based on the calibration reliability R1, or may be the calibration reliability R2. The calibration reliability R2 may include the self - calibration reliability R2 of the second gas sensor device 250 and the calibration reliability R2 when the second gas sensor device 200 is calibrated by another sensor.

[0139] The gas sensor device 150 may further include a position information acquisition unit 16. The gas sensor device 250 may further include a position information acquisition unit 26. The position information acquisition unit 16 acquires the position information of the first gas sensor device 100. The position information acquisition unit 26 acquires the position information of the second gas sensor device 200. The position information acquisition unit 16 and the position information acquisition unit 26 are, for example, the Global Positioning System (GPS).

[0140] Let the position information of the first gas sensor device 150 be position information Ip1. The reliability information Ir1 may include the position information Ip1. Let the position information of the second gas sensor device 250 be position information Ip2. The reliability information Ir2 may include the position information Ip2.

[0141] Based on the distance d between the position of the first gas sensor device 150 and the position of the second gas sensor device 250, and the first calibration information Ic', the calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21. As described above, the predetermined distance between the position of the first gas sensor 11 and the position of the second gas sensor 21 is the distance dp2. When the distance d is less than the distance dp2, the calibration unit 24 may calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21. As described above, the distance dp2 may refer to a distance at which there is a high probability that the first gas sensor 11 and the second gas sensor 21 are arranged in the same space (for example, the internal space 508 in FIG. 7).

[0142] When the distance d exceeds the distance dp2, the calibration unit 24 does not have to calibrate the concentration of the gas 504 calculated based on the output of the second gas sensor 21. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 according to the distance d based on the first calibration information Ic'.

[0143] FIG. 9 is a block diagram showing another example of the gas sensor device 150 and the gas sensor device 250 according to an embodiment of the present invention. In this example, a plurality of gas sensor devices 150 (gas sensor devices 150-1 to gas sensor devices 150-n) are arranged on the measurement target 501, and one gas sensor device 250 is arranged on the measurement target 502. The gas sensor device 150 may be the same as the first gas sensor device 100 shown in FIG. 5. The gas sensor device 250 may be the same as the second gas sensor device 200 shown in FIG. 5.

[0144] Each of the transmission units 13-1 to 13-n (see FIG. 8) of the gas sensor devices 150-1 to 150-n may transmit first calibration information Ic'1 to first calibration information Ic'n, respectively. When a plurality of living bodies 90 (see FIG. 7) move to the measurement target 502, the transmission units 13-1 to 13-n may transmit the first calibration information Ic'1 to the first calibration information Ic'n to the internal space 508 (see FIG. 7), respectively.

[0145] The receiving unit 20 of the gas sensor device 250 may receive the first calibration information Ic' of each of the plurality of gas sensor devices 150. In this example, the receiving unit 20 receives the first calibration information Ic'1 to the first calibration information Ic'n transmitted by each of the transmission units 13-1 to 13-n (see FIG. 8).

[0146] The calibration unit 24 of the gas sensor device 250 may calibrate the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the plurality of first calibration information Ic'. In this example, the calibration unit 24 calibrates the concentration of the gas 504 based on the first calibration information Ic'1 to the first calibration information Ic'n. As a result, the concentration of the gas 504 is more likely to be calibrated to a more accurate concentration than when calibrated based on one piece of first calibration information Ic'.

[0147] Each of the transmission units 13 (see FIG. 8) of the plurality of gas sensor devices 150 may transmit the reliability information Ir1 of each of the first gas sensor devices 150. In this example, the transmission units 13-1 to 13-n transmit the reliability information Ir1-1 to the reliability information Ir1-n, respectively.

[0148] The receiving unit 20 may receive the reliability information Ir1 of each of the plurality of first gas sensor devices 150. In this example, the receiving unit 20 receives the reliability information Ir1-1 to the reliability information Ir1-n. The reliability information Ir1-1 to the reliability information Ir1-n may be stored in the storage unit 122.

[0149] The calibration unit 24 may weight the respective calibration reliabilities R11 to R1n of the plurality of first gas sensor devices 150. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the weighted calibration reliability R1. As a result, the concentration of the gas 504 is more likely to be calibrated to an accurate concentration than when calibrated based on the unweighted calibration reliability R1. The calibration unit 24 may calibrate the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the highest calibration reliability R1 among the calibration reliabilities R11 to R1n.

[0150] FIG. 10 is a flowchart showing an example of a gas sensor calibration method according to an embodiment of the present invention. The gas sensor calibration method according to an embodiment of the present invention will be described by taking the gas sensor system 400 shown in FIGS. 4 and 5 as an example.

[0151] The transmission step S100 is a step in which the transmission unit 13 transmits the first calibration information Ic'. The first calibration information Ic' is calibration information for calibrating the concentration of the gas 503 (see FIG. 1) of the measurement target 501 (see FIG. 1) calculated based on the output of the first gas sensor 11.

[0152] The reception step S102 is a step in which the reception unit 20 receives the first calibration information Ic' transmitted in the transmission step S100. The calibration step S104 is a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 1) of the measurement target 502 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the reception step S102.

[0153] The transmission step S100 may be a step in which the transmission unit 13 further transmits the reliability information Ir1 indicating the calibration reliability R1 of the first gas sensor device 100. The reception step S102 may be a step in which the reception unit 20 further receives the reliability information Ir1 transmitted in the transmission step S100.

[0154] The calibration step S104 may be a step in which the calibration unit 24 calibrates the gas concentration of the gas 504 of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' and the reliability information Ir1. The calibration step S104 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the reception step S102 according to the calibration reliability R1.

[0155] The calibration step S104 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the reception step S102 when the self-calibration reliability R2 of the second gas sensor device 200 is equal to or lower than a predetermined second threshold value Rth2 and the calibration reliability R1 exceeds the first threshold value Rth1.

[0156] The calibration step S104 may be a step in which the calibration unit 24 compares the calibration reliability R1 received in the reception step S102 with the calibration reliability R2, and when the calibration reliability R1 is higher than the calibration reliability R2, calibrates the concentration of the gas 504 of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the reception step S102. The calibration step S104 may be a step in which the calibration unit 24 calibrates the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' when the calibration reliability R1 of the first gas sensor device 100 received in the reception step S102 is higher than the reference calibration reliability Cs.

[0157] FIG. 11 shows an example of the details of calibration step S104 in FIG. 10. The AD conversion step S90 is a step in which the AD conversion unit 124 converts the output of the analog signal of the second gas sensor 21 into a digital signal. The calculation step S92 is a step in which the calculation unit 120 calculates the concentration of the gas 504 based on the digital signal converted in the AD conversion step S90. The storage step S94 is a step in which the storage unit 112 stores the concentration of the gas 504 calculated in the calculation step S92. The storage step S94 may be a step of storing the correlation Cr' between the concentration of the gas 504 calculated in the calculation step S92 and the first calibration information Ic'.

[0158] The calculation step S96 is a step in which the calculation unit 120 calculates the second calibration information Ic'' based on the first calibration information Ic' received in the reception step 102 and the correlation Cr' stored in the storage step S94. The calibration step S98 using the digital signal is a step in which the calibration unit 24 (see FIG. 4) calibrates the concentration of the gas 504 of the measurement target 502 (see FIG. 1) calculated based on the output of the second gas sensor 21 using the second calibration information Ic'' of the digital signal. Note that the calculation step S96 may be a step in which the calibration unit 24 calculates and calibrates the concentration of the gas 504 based on the digital signal converted in the AD conversion step S90 and the first calibration information Ic' received in the reception step S102.

[0159] When the living body 90 (see FIG. 1) having the first gas sensor device 100 moves from the measurement target 501 to the measurement target 502, the measurement target 502 for which the concentration of the gas 504 is calculated based on the output of the first gas sensor 11 and the measurement target 502 for which the concentration of the gas 504 is calculated based on the output of the second gas sensor 21 may be the same. That the measurement targets 502 are the same may mean that the types of the measurement target gases of the first gas sensor device 100 and the second gas sensor device 200 are the same in the measurement target 502. In this example, the second gas sensor device 200 is disposed in the internal space 508.

[0160] That the measurement target 502 is the same may mean that the first gas sensor 11 and the second gas sensor 21 share the same space (in this example, the internal space 508 (see FIG. 1)). The same space may refer to at least one of the following cases: when the temperature or humidity in the space is the same, when the ID of short-range wireless (such as wifi (registered trademark), etc.) is the same, and when the first gas sensor device 100 and the second gas sensor device 200 are mobile terminals and the amplitude and frequency of the sound wave acquired by the mobile terminal are the same.

[0161] The storage unit 122 may store the reference reliability information Cs. The storage step S94 may include an update step S941 in which, when the calibration reliability R1 of the first gas sensor device 100 received in the reception step S102 is higher than the reference calibration reliability Cs, the storage unit 122 updates the reference calibration reliability Cs based on the received calibration reliability R1. In the storage step S94, the storage unit 122 may store the updated reference calibration reliability Cs. The calibration step S104 may be a step in which the calibration unit 24 calibrates the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 according to the updated reference reliability Cs based on the first calibration information Ic'.

[0162] The update step S941 may be a step in which, when the calibration reliability R1 of the first gas sensor device 100 received in the reception step S102 is higher than the reference calibration reliability Cs, the storage unit 122 updates the reference calibration reliability Cs to the calibration reliability R1. In the storage step S94, when the calibration reliability R1 is lower than the reference calibration reliability Cs, the storage unit 122 does not have to update the reference calibration reliability Cs.

[0163] The reference reliability information Cs stored in the memory step S94 may be the reference reliability information Cs updated based on the calibration reliability R1, or may be the calibration reliability R2. The calibration reliability R2 may include the calibration reliability R2 of the self-calibration of the second gas sensor device 200 and the calibration reliability R2 when the second gas sensor device 200 is calibrated by another sensor.

[0164] FIG. 12 is a flowchart showing another example of the gas sensor calibration method according to an embodiment of the present invention. The gas sensor calibration method of this example is different from the gas sensor calibration method shown in FIG. 10 in that it further includes a memory step S1031 and a position information acquisition step S1032. The gas sensor calibration method of this example will be described by taking the gas sensor system 400 shown in FIGS. 4 and 5 as an example.

[0165] The memory step S1031 is a step in which the memory unit 122 stores the reliability information Ir1 received in the reception step S102. The calibration step S104 is a step in which the calibration unit 24 compares the reliability information Ir1 received in the reception step S102 with the reliability information Ir1 stored in the memory step 1031, and when the reliability information Ir1 received in the reception step S102 is higher than the reliability information Ir1 stored in the memory step 1031, the concentration of the gas 504 (see FIG. 1) of the measurement target 502 (see FIG. 1) calculated based on the output of the second gas sensor 21 is calibrated based on the first calibration information Ic' received in the reception step S102. The calibration step S104 may be performed after the memory step S1031.

[0166] When the calibration reliability R1 of the first gas sensor device 100 received in the reception step S102 is higher than the reference calibration reliability Cs, the memory step S1031 may include an update step S1033 in which the memory unit 122 updates the reference calibration reliability Cs based on the received calibration reliability R1. In the memory step S1031, the memory unit 122 may store the updated reference calibration reliability Cs. The calibration step S104 may be a step in which the calibration unit 24 calibrates the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 according to the updated reference reliability Cs based on the first calibration information Ic'.

[0167] When the calibration reliability R1 of the first gas sensor device 100 received in the reception step S102 is higher than the reference calibration reliability Cs, the update step S1033 may be a step in which the memory unit 122 updates the reference calibration reliability Cs to the calibration reliability R1. In the memory step S1031, when the calibration reliability R1 is lower than the reference calibration reliability Cs, the memory unit 122 may not update the reference calibration reliability Cs.

[0168] The reference reliability information Cs stored in the memory step S1031 may be the reference reliability information Cs updated based on the calibration reliability R1, or may be the calibration reliability R2. The calibration reliability R2 may include the self-calibration reliability R2 of the second gas sensor device 200 and the calibration reliability R2 when the second gas sensor device 200 is calibrated by another sensor.

[0169] The position information acquisition step S1032 is a step in which the position information acquisition unit 26 acquires the position information Ip2 of the second gas sensor device 200. In the position information acquisition step S1032, the position information acquisition unit 16 may acquire the position information Ip1 of the first gas sensor device 100. The position information acquisition unit 16 and the position information acquisition unit 26 are, for example, the Global Positioning System (GPS).

[0170] The reliability information Ir1 may include the position information Ip1. As described above, the distance d is the distance between the position of the first gas sensor device 100 and the position of the second gas sensor device 200 acquired by the position information acquisition unit 26. The calibration step 104 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the distance d and the first calibration information Ic'. The calibration step S104 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 calculated based on the output of the second gas sensor 21 according to the distance d based on the first calibration information Ic' received in the reception step S102. The calibration step S104 may be performed after the position information acquisition step S1032.

[0171] As described above, the distance dp2 is a predetermined distance between the position of the first gas sensor 11 and the position of the second gas sensor 21. The calibration step S104 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 when the distance d is less than the distance dp2. In the calibration step S104, when the distance d is greater than or equal to the distance dp2, the calibration unit 24 may not calibrate the concentration of the gas 504 and may calibrate it based on the second calibration information Ic''. The second calibration information Ic'' is calibration information for calibrating the concentration of the gas 504 (see FIG. 7) of the measurement target 502 (see FIG. 7) calculated based on the output of the second gas sensor 21.

[0172] The order of the storage step S1031 and the position information acquisition step S1032 may be reversed. That is, the position information acquisition step S1032 may be performed after the reception step S102, and the storage step S1031 may be performed after the position information acquisition step S1032. When the order of the storage step S1031 and the position information acquisition step S1032 is reversed, the position information Ip2 may be stored in the storage unit 122, and the position information Ip2 and the position information Ip1 may be stored.

[0173] The receiving step S102 may be a step in which the receiving unit 20 receives the first calibration information Ic' in each of the plurality of first gas sensor devices 100. The calibration step S104 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on each of the first calibration information Ic' received in the receiving step 102. In this example, in the calibration step S104, the calibration unit 24 calibrates the concentration of the gas 504 based on the first calibration information Ic'1 to the first calibration information Ic'n. Thereby, the concentration of the gas 504 is more likely to be calibrated to a more accurate concentration than when calibrated based on one piece of the first calibration information Ic'.

[0174] The transmitting step S100 may be a step in which the transmitting unit 13 further transmits the reliability information Ir1 of each of the plurality of first gas sensor devices 100. The receiving step S102 may be a step in which the receiving unit 20 further receives the reliability information Ir1 transmitted in the transmitting step S100. The calibration step S104 may be a step in which the calibration unit 24 weights the calibration reliabilities R11 to R1n and calibrates the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the weighted calibration reliability R1.

[0175] The storing step S1031 may be a step of storing the reliability information Ir1 of each of the plurality of first gas sensor devices 100 received in the receiving step S102. The calculating step S96 shown in FIG. 11 may be a step in which the calculating unit 120 calculates the weighting of the calibration reliabilities R11 to R1n based on the respective reliability information Ir1 stored in the storing step S1031, and calculates the second calibration information Ic'' by applying the weighting to the calibration reliabilities R11 to R1n.

[0176] The calibration step S98 shown in FIG. 11 may be a step in which the calibration unit 24 (see FIGS. 4 and 5) calibrates the concentration of the gas 504 (see FIG. 1) of the measurement target 502 (see FIG. 1) calculated based on the output of the second gas sensor 21 by a digital signal of the weighted second calibration information Ic''. Thereby, the concentration of the gas 504 is more likely to be calibrated to an accurate concentration than when calibrated based on the second calibration information Ic'' without the weighting of the calibration reliability R1.

[0177] The calibration step S104 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 1) calculated based on the output of the second gas sensor 21 based on the highest calibration reliability R1 among the calibration reliabilities R11 to R1n. In the calibration step S104, the calibration unit 24 may calibrate the concentration of the gas 504 by setting the weighting of the highest calibration reliability R1 to 1 and the weighting of the other calibration reliabilities R1 to zero.

[0178] FIG. 13 is a flowchart showing an example of a gas sensor calibration method according to an embodiment of the present invention. An example of the gas sensor calibration method according to an embodiment of the present invention will be described by taking the gas sensor device 150 shown in FIGS. 8 and 9 as an example.

[0179] The transmission step S200 is a step in which the transmission unit 13 transmits the first calibration information Ic' to the second gas sensor device 250. The first calibration information Ic' is calibration information for calibrating the concentration of the gas 503 (see FIG. 7) of the measurement target 501 (see FIG. 7) calculated based on the output of the first gas sensor 11. The transmission step S200 may be a step in which the transmission unit 13 further transmits the reliability information Ir1 indicating the calibration reliability R1 of the first gas sensor device 150 to the second gas sensor device 250.

[0180] FIG. 14 is a flowchart showing an example of a gas sensor calibration method according to an embodiment of the present invention. An example of the gas sensor calibration method according to an embodiment of the present invention will be described by taking the gas sensor device 250 shown in FIGS. 8 and 9 as an example.

[0181] The receiving step S302 is a step in which the receiving unit 20 receives the first calibration information Ic' of the first gas sensor device 150. The calibration step S304 is a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 7) of the measurement target 502 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the receiving step S102.

[0182] In the gas sensor calibration method shown in FIGS. 13 and 14, when the living body 90 (see FIG. 7) having the first gas sensor device 150 moves from the measurement target 501 to the measurement target 502, the measurement target 502 for which the concentration of the gas 504 is calculated based on the output of the first gas sensor 11 and the measurement target 502 for which the concentration of the gas 504 is calculated based on the output of the second gas sensor 21 may be the same. As described above, the fact that the measurement targets 502 are the same means that the types of the measurement target gases of the first gas sensor device 150 and the second gas sensor device 250 in the measurement target 502 are the same. In this example, the second gas sensor device 250 is disposed in the internal space 508.

[0183] As described above, the fact that the measurement targets 502 are the same may mean that the first gas sensor 11 and the second gas sensor 21 share the same space (in this example, the internal space 508 (see FIG. 7)). The same space may refer to at least one of the following cases: when the temperature or humidity in the space is the same, when the ID of short-range wireless (such as wifi (registered trademark), etc.) is the same, and when the first gas sensor device 150 and the second gas sensor device 250 are mobile terminals and the amplitude and frequency of the sound wave acquired by the mobile terminal are the same.

[0184] The reception step S302 may be a step in which the receiving unit 20 further receives reliability information Ir1 indicating the calibration reliability R1. The calibration step S304 may be a step in which the calibration unit 24 calibrates the gas concentration of the gas 504 of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' and the reliability information Ir1. The calibration step S304 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 calculated based on the output of the second gas sensor 21 according to the calibration reliability R1 based on the first calibration information Ic' received in the reception step S302.

[0185] The calibration step S304 may be a step in which, when the calibration reliability R2 of the self-calibration of the second gas sensor device 250 is equal to or lower than a predetermined second threshold value Rth2 and the calibration reliability R1 exceeds the first threshold value Rth1, the calibration unit 24 calibrates the concentration of the gas 504 of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the reception step S302.

[0186] The calibration step S304 may be a step in which the calibration unit 24 compares the calibration reliability R1 of the first gas sensor device 150 with the calibration reliability R2, and when the calibration reliability R1 is higher than the calibration reliability R2, calibrates the concentration of the gas 504 of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the reception step S302. The calibration step S304 may be a step in which, when the calibration reliability R1 of the first gas sensor device 150 received in the reception step S302 is higher than the reference calibration reliability Cs, the calibration unit 24 calibrates the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic'.

[0187] FIG. 15 shows an example of details of the calibration step S304 in FIG. 14. The AD conversion step S190 is a step in which the AD conversion unit 124 converts the output of the analog signal of the second gas sensor 21 into a digital signal. The calculation step S192 is a step in which the calculation unit 120 calculates the concentration of the gas 504 based on the digital signal converted in the AD conversion step S190. The storage step S194 is a step in which the storage unit 112 stores the concentration of the gas 504 calculated in the calculation step S192. The storage step S194 may be a step of storing the correlation Cr' between the concentration of the gas 504 calculated in the calculation step S192 and the first calibration information Ic'.

[0188] The calculation step S196 is a step in which the calculation unit 120 calculates the second calibration information Ic'' based on the first calibration information Ic' received in the reception step 302 and the correlation Cr' stored in the storage step S194. The calibration step S198 using the digital signal is a step in which the calibration unit 24 (see FIG. 4) calibrates the concentration of the gas 504 (see FIG. 7) of the measurement target 502 (see FIG. 7) calculated based on the output of the second gas sensor 21 with the second calibration information Ic'' of the digital signal. Note that the calculation step S196 may be a step in which the calibration unit 24 calibrates while calculating the concentration of the gas 504 based on the digital signal converted in the AD conversion step S190 and the second calibration information Ic'' received in the reception step S302.

[0189] The memory unit 122 may store the reference reliability information Cs. The storing step S194 may include an updating step S1941 in which, when the calibration reliability R1 of the first gas sensor device 150 received in the receiving step S302 is higher than the reference calibration reliability Cs, the memory unit 122 updates the reference calibration reliability Cs based on the received calibration reliability R1. In the storing step S194, the memory unit 122 may store the updated reference calibration reliability Cs. The calibration step S304 may be a step in which the calibration unit 24 calibrates the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 according to the updated reference reliability Cs based on the first calibration information Ic'.

[0190] The updating step S1941 may be a step in which, when the calibration reliability R1 of the first gas sensor device 150 received in the receiving step S302 is higher than the reference calibration reliability Cs, the memory unit 122 updates the reference calibration reliability Cs to the calibration reliability R1. In the storing step S194, when the calibration reliability R1 is lower than the reference calibration reliability Cs, the memory unit 122 may not update the reference calibration reliability Cs.

[0191] The reference reliability information Cs stored in the storing step S194 may be the reference reliability information Cs updated based on the calibration reliability R1, or may be the calibration reliability R2. The calibration reliability R2 may include the self - calibration reliability R2 of the second gas sensor device 250 and the calibration reliability R2 when the second gas sensor device 250 is calibrated by another sensor.

[0192] FIG. 16 is a flowchart showing another example of the gas sensor calibration method according to an embodiment of the present invention. The gas sensor calibration method of this example is different from the gas sensor calibration method shown in FIG. 14 in that it further includes a storing step S3031 and a position information acquisition step S3032. The gas sensor calibration method of this example will be described by taking the gas sensor device 250 shown in FIGS. 8 and 9 as an example.

[0193] The memory step S3031 is a step in which the memory unit 122 stores the reliability information Ir1 received in the reception step S302. The calibration step S304 is a step in which the calibration unit 24 compares the reliability information Ir1 received in the reception step S302 with the reliability information Ir1 stored in the memory step 3031, and when the reliability information Ir1 received in the reception step S302 is higher than the reliability information Ir1 stored in the memory step 3031, calibrates the concentration of the gas 504 (see FIG. 7) of the measurement target 502 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' received in the reception step S302. The calibration step S304 may be performed after the memory step S3031.

[0194] The memory step S3031 may include an update step S3033 in which when the calibration reliability R1 of the first gas sensor device 150 received in the reception step S102 is higher than the reference calibration reliability Cs, the memory unit 122 updates the reference calibration reliability Cs based on the received calibration reliability R1. In the memory step S3031, the memory unit 122 may store the updated reference calibration reliability Cs. The calibration step S304 may be a step in which the calibration unit 24 calibrates the gas concentration of the measurement target 502 calculated based on the output of the second gas sensor 21 based on the first calibration information Ic' according to the updated reference reliability Cs.

[0195] The update step S3033 may be a step in which when the calibration reliability R1 of the first gas sensor device 150 received in the reception step S302 is higher than the reference calibration reliability Cs, the memory unit 122 updates the reference calibration reliability Cs to the calibration reliability R1. In the memory step S3031, when the calibration reliability R1 is lower than the reference calibration reliability Cs, the memory unit 122 does not have to update the reference calibration reliability Cs.

[0196] The reference reliability information Cs stored in the memory step S3031 may be the reference reliability information Cs updated based on the calibration reliability R1, or may be the calibration reliability R2. The calibration reliability R2 may include the calibration reliability R2 of the self-calibration of the second gas sensor device 250 and the calibration reliability R2 when the second gas sensor device 250 is calibrated by another sensor.

[0197] The position information acquisition step S3032 is a step in which the position information acquisition unit 26 acquires the position information Ip2 of the second gas sensor device 200. In the position information acquisition step S3032, the position information acquisition unit 16 may acquire the position information Ip1 of the first gas sensor device 100. The position information acquisition unit 16 and the position information acquisition unit 26 are, for example, the Global Positioning System (GPS).

[0198] The reliability information Ir1 may include the position information Ip1. As described above, the distance d is the distance between the position of the first gas sensor device 100 and the position of the second gas sensor device 200 acquired by the position information acquisition unit 26. The calibration step 304 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the distance d and the first calibration information Ic'. The calibration step S304 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 calculated based on the output of the second gas sensor 21 according to the distance d based on the first calibration information Ic' received in the reception step S302. The calibration step S304 may be performed after the position information acquisition step S3032.

[0199] As described above, the distance dp2 is a predetermined distance between the position of the first gas sensor 11 and the position of the second gas sensor 21. The calibration step S304 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 when the distance d is less than the distance dp2. In the calibration step S304, when the distance d is greater than or equal to the distance dp2, the calibration unit 24 does not have to calibrate the concentration of the gas 504.

[0200] The order of the memory step S3031 and the position information acquisition step S3032 may be reversed. That is, the position information acquisition step S3032 may be performed after the reception step S302, and the memory step S3031 may be performed after the position information acquisition step S3032. When the order of the memory step S3031 and the position information acquisition step S3032 is reversed, the position information Ip2 may be stored in the memory unit 122, or the position information Ip2 and the position information Ip1 may be stored.

[0201] The reception step S302 may be a step in which the reception unit 20 receives the first calibration information Ic' in each of the plurality of first gas sensor devices 100. The calibration step S304 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on each of the first calibration information Ic' received in the reception step 302. In this example, in the calibration step S304, the calibration unit 24 calibrates the concentration of the gas 504 based on the first calibration information Ic'1 to the first calibration information Ic'n. Thereby, the concentration of the gas 504 is more likely to be calibrated to a more accurate concentration than when calibrated based on one piece of first calibration information Ic'.

[0202] The reception step S302 may be a step in which the reception unit 20 further receives the reliability information Ir1 of each of the plurality of first gas sensor devices 100. The calibration step S304 may be a step in which the calibration unit 24 weights the calibration reliabilities R11 to R1n, and calibrates the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the weighted calibration reliability R1.

[0203] The memory step S3031 may be a step of storing the reliability information Ir1 of each of the plurality of first gas sensor devices 100 received in the reception step S302. The calculation step S196 shown in FIG. 15 may be a step in which the calculation unit 120 calculates the weighting of the calibration reliabilities R11 to R1n based on the respective reliability information Ir1 stored in the memory step S3031, and calculates the second calibration information Ic'' by applying the weighting to the calibration reliabilities R11 to R1n.

[0204] The calibration step S198 shown in FIG. 15 by a digital signal may be a step in which the calibration unit 24 (see FIGS. 8 and 9) calibrates the concentration of the gas 504 (see FIG. 7) of the measurement target 502 (see FIG. 7) calculated based on the output of the second gas sensor 21 by the digital signal of the weighted second calibration information Ic''. Thereby, the concentration of the gas 504 is more likely to be calibrated to an accurate concentration than when calibrated based on the second calibration information Ic'' without the weighting of the calibration reliability R1.

[0205] The calibration step S304 may be a step in which the calibration unit 24 calibrates the concentration of the gas 504 (see FIG. 7) calculated based on the output of the second gas sensor 21 based on the highest calibration reliability R1 among the calibration reliabilities R11 to R1n. In the calibration step S304, the calibration unit 24 may calibrate the concentration of the gas 504 by setting the weighting of the highest calibration reliability R1 to 1 and the weighting of the other calibration reliabilities R1 to zero.

[0206] Various embodiments of the present invention may be described with reference to flowcharts and block diagrams. In various embodiments of the present invention, a block may represent (1) a stage of a process in which an operation is performed or (2) a section of a device having a role of performing an operation.

[0207] Certain stages may be executed by a dedicated circuit, a programmable circuit, or a processor. Certain sections may be implemented by a dedicated circuit, a programmable circuit, or a processor. The programmable circuit and the processor may be provided with computer-readable instructions. The computer-readable instructions may be stored on a computer-readable medium.

[0208] The dedicated circuit may include at least one of a digital hardware circuit and an analog hardware circuit. The dedicated circuit may also include at least one of an integrated circuit (IC) and a discrete circuit. The programmable circuit may include a hardware circuit for logical AND, logical OR, logical XOR, logical NAND, logical NOR, or other logical operations. The programmable circuit may also include a reconfigurable hardware circuit including memory elements such as flip-flops, registers, field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), etc.

[0209] The computer-readable medium may include any tangible device capable of storing instructions executable by an appropriate device. By including the tangible device, the computer-readable medium having instructions stored thereon will comprise a product including instructions that can be executed to create means for performing the operations specified in a flowchart or block diagram.

[0210] A computer-readable medium may be, for example, an electronic memory medium, a magnetic memory medium, an optical memory medium, an electromagnetic memory medium, a semiconductor memory medium, etc. More specifically, the computer-readable medium may be, for example, a floppy (registered trademark) disk, a diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an electrically erasable programmable read-only memory (EEPROM), a static random access memory (SRAM), a compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a Blu-ray (RTM) disc, a memory stick, an integrated circuit card, etc.

[0211] The computer-readable instructions may include any one of assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, source code, and object code. The source code and the object code may be described in any combination of one or more programming languages, including object-oriented programming languages and conventional procedural programming languages. The object-oriented programming languages may be, for example, Smalltalk (registered trademark), JAVA (registered trademark), C++, etc. The procedural programming language may be, for example, the "C" programming language.

[0212] Computer-readable instructions may be provided locally or via a wide area network (WAN), such as a local area network (LAN) or the Internet, to a processor or programmable circuit of a general-purpose computer, a special-purpose computer, or other programmable data processing device. The processor or programmable circuit of the general-purpose computer, special-purpose computer, or other programmable data processing device may execute the computer-readable instructions to create means for performing the operations specified in the flowcharts shown in FIGS. 10 to 16 or the block diagrams shown in FIGS. 2 to 5, 8, or 9. The processor may be, for example, a computer processor, a processing unit, a microprocessor, a digital signal processor, a controller, a microcontroller, or the like.

[0213] FIG. 17 is a diagram showing an example of a computer 2200 in which the gas sensor system 400, the gas sensor device 150, or the gas sensor device 250 according to an embodiment of the present invention may be wholly or partially embodied. The program installed in the computer 2200 can cause the computer 2200 to perform operations associated with the gas sensor device 150 or the gas sensor device 250 according to an embodiment of the present invention, or function as one or more sections of the gas sensor device 150 or the gas sensor device 250, or execute the operations or the one or more sections, or cause the computer 2200 to execute each step (see FIGS. 10 to 16) according to the prediction method of the present invention. The program may be executed by the CPU 2212 to cause the computer 2200 to perform specific operations associated with some or all of the blocks in the flowcharts (FIGS. 10 to 16) and block diagrams (FIGS. 2 to 5, 8, or 9) described herein.

[0214] A computer 2200 according to one embodiment of the present invention includes a CPU 2212, a RAM 2214, a graphic controller 2216, and a display device 2218. The CPU 2212, the RAM 2214, the graphic controller 2216, and the display device 2218 are interconnected by a host controller 2210. The computer 2200 further includes input / output units such as a communication interface 2222, a hard disk drive 2224, a DVD-ROM drive 2226, and an IC card drive. The communication interface 2222, the hard disk drive 2224, the DVD-ROM drive 2226, and the IC card drive are connected to the host controller 2210 via an input / output controller 2220. The computer further includes legacy input / output units such as a ROM 2230 and a keyboard 2242. The ROM 2230 and the keyboard 2242 are connected to the input / output controller 2220 via an input / output chip 2240.

[0215] The CPU 2212 controls each unit by operating according to programs stored in the ROM 2230 and the RAM 2214. The graphic controller 2216 causes image data generated by the CPU 2212 to be displayed on the display device 2218 by acquiring the image data in a frame buffer or the like provided in the RAM 2214 or in the RAM 2214.

[0216] The communication interface 2222 communicates with other electronic devices via a network. The hard disk drive 2224 stores programs and data used by the CPU 2212 in the computer 2200. The DVD-ROM drive 2226 reads a program or data from the DVD-ROM 2201 and provides the read program or data to the hard disk drive 2224 via the RAM 2214. The IC card drive reads programs and data from an IC card or writes programs and data to an IC card.

[0217] The ROM 2230 stores a boot program or the like executed by the computer 2200 when activated, or a program that depends on the hardware of the computer 2200. The input / output chip 2240 may connect various input / output units to the input / output controller 2220 via a parallel port, a serial port, a keyboard port, a mouse port, etc.

[0218] The program is provided by a computer-readable medium such as a DVD-ROM 2201 or an IC card. The program is read from the computer-readable medium, installed in the hard disk drive 2224, the RAM 2214, or the ROM 2230, which are also examples of computer-readable media, and executed by the CPU 2212. The information processing described in these programs is read by the computer 2200, resulting in the cooperation between the programs and the various types of hardware resources described above. The device or method may be configured by realizing the operation or processing of information according to the use of the computer 2200.

[0219] For example, when communication is executed between the computer 2200 and an external device, the CPU 2212 may execute a communication program loaded into the RAM 2214 and instruct the communication interface 2222 to perform communication processing based on the processing described in the communication program. The communication interface 2222 reads the transmission data stored in the transmission buffer processing area provided in a recording medium such as the RAM 2214, the hard disk drive 2224, the DVD-ROM 2201, or the IC card under the control of the CPU 2212, transmits the read transmission data to the network, or writes the received data received from the network to the reception buffer processing area provided on the recording medium.

[0220] The CPU 2212 may cause all or a necessary part of a file or database stored in an external recording medium such as a hard disk drive 2224, a DVD-ROM drive 2226 (DVD-ROM 2201), an IC card, etc. to be read into the RAM 2214. The CPU 2212 may perform various types of processing on the data on the RAM 2214. Next, the CPU 2212 may write back the processed data to the external recording medium.

[0221] Various types of information such as various types of programs, data, tables, and databases may be stored in the recording medium and be processed. The CPU 2212 may perform various types of processing on the data read from the RAM 2214, including various types of operations, information processing, condition judgment, conditional branch, unconditional branch, information search or replacement, etc. specified by the instruction sequence of the program described in this disclosure. The CPU 2212 may write back the result to the RAM 2214.

[0222] The CPU 2212 may search for information in files, databases, etc. in the recording medium. For example, when a plurality of entries each having an attribute value of a first attribute associated with an attribute value of a second attribute are stored in the recording medium, the CPU 2212 searches for an entry that matches the condition where the attribute value of the first attribute is specified from among the plurality of entries, reads the attribute value of the second attribute stored in the entry, and by reading the second attribute value, may obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition.

[0223] The above-described program or software module may be stored on the computer 2200 or on a computer-readable medium of the computer 2200. A recording medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet can be used as a computer-readable medium. The program may be provided to the computer 2200 by the recording medium.

[0224] As described above, the present invention has been described using embodiments. However, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that forms with such changes or improvements can also be included in the technical scope of the present invention.

[0225] It should be noted that the execution order of each process such as operations, procedures, steps, and stages in the devices, systems, programs, and methods shown in the claims, the specification, and the drawings is not explicitly stated as "earlier" or "preceding" etc., and can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flows in the claims, the specification, and the drawings, even if "first," "next," etc. are used for convenience in the description, it does not mean that it is essential to implement in this order. [Item 1] A first gas sensor device having a transmission unit that transmits first calibration information for calibrating the gas concentration of a measurement target calculated based on the output of a first gas sensor; A second gas sensor device having a reception unit that receives the first calibration information transmitted by the transmission unit, and a calibration unit that calibrates the gas concentration of a measurement target calculated based on the output of a second gas sensor based on the first calibration information received by the reception unit; A gas sensor system comprising the same. [Item 2] The gas sensor system according to Item 1, wherein the measurement target for which the gas concentration is calculated based on the output of the first gas sensor and the measurement target for which the gas concentration is calculated based on the output of the second gas sensor are the same. [Item 3] The first gas sensor device has the first gas sensor, The first gas sensor device is a mobile terminal. The gas sensor system according to Item 1 or 2. [Item 4] The second gas sensor device is the gas sensor system according to item 3, which is arranged in the internal space in the measurement target in which the gas concentration is calculated based on the output of the second gas sensor. [Item 5] The second gas sensor device has the second gas sensor, and the second gas sensor device is a mobile terminal. The gas sensor system according to any one of items 1 to 4. [Item 6] The transmission unit further transmits reliability information indicating the calibration reliability of the first gas sensor device. The reception unit further receives the reliability information. The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor according to the calibration reliability of the first gas sensor device based on the received first calibration information. The gas sensor system according to any one of items 1 to 5. [Item 7] When the reliability of the self-calibration of the second gas sensor device is equal to or lower than a predetermined second threshold and the calibration reliability of the first gas sensor device exceeds the first threshold, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor according to the received first calibration information. The gas sensor system according to item 6. [Item 8] The calibration unit compares the calibration reliability of the first gas sensor device received by the reception unit with the calibration reliability of the second gas sensor device. When the calibration reliability of the first gas sensor device is higher than the calibration reliability of the second gas sensor device, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor according to the received first calibration information. The gas sensor system according to item 6 or 7. [Item 9] The second gas sensor device further has a storage unit that stores the reliability information received by the reception unit. The calibration unit compares the calibration reliability of the first gas sensor device received by the receiving unit with the calibration reliability of the first gas sensor device stored in the storage unit. When the calibration reliability of the first gas sensor device received by the receiving unit is higher than the calibration reliability stored in the storage unit, the gas concentration of the measurement target calculated based on the output of the second gas sensor is calibrated based on the received first calibration information. The gas sensor system according to any one of items 6 to 8. [Item 10] The second gas sensor device further includes a position information acquisition unit that acquires position information of the second gas sensor device. The reliability information includes the position information of the first gas sensor device. The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information according to the distance between the position of the first gas sensor device and the position of the second gas sensor device acquired by the position information acquisition unit. The gas sensor system according to any one of items 6 to 9. [Item 11] When the distance is less than a predetermined distance, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information. The gas sensor system according to item 10. [Item 12] Comprising a plurality of the first gas sensor devices. The receiving unit receives the first calibration information of each of the plurality of first gas sensor devices. The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information of each of the plurality of first gas sensor devices. The gas sensor system according to any one of items 6 to 11. [Item 13] The transmission unit of each of the plurality of first gas sensor devices transmits the reliability information of each of the first gas sensor devices. The receiving unit receives the reliability information of each of the plurality of first gas sensor devices. The calibration unit weights the calibration reliability of each of the plurality of first gas sensor devices, and calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the weighted calibration reliability. The gas sensor system according to item 12. [Item 14] The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the highest calibration reliability among the calibration reliabilities of each of the plurality of first gas sensor devices. The gas sensor system according to item 13. [Item 15] A transmission unit that transmits first calibration information to a second gas sensor device. The first calibration information is calibration information for calibrating the gas concentration of the measurement target calculated based on the output of the first gas sensor. Gas sensor device. [Item 16] The second gas sensor device has a second gas sensor. The measurement target whose gas concentration is calculated based on the output of the first gas sensor and the measurement target whose gas concentration is calculated based on the output of the second gas sensor are the same. The gas sensor device according to item 15. [Item 17] The second gas sensor is provided in a mobile terminal. The gas sensor device according to item 16. [Item 18] The first gas sensor is provided in a first gas sensor device. The transmission unit further transmits reliability information indicating the calibration reliability of the first gas sensor device to the second gas sensor device. The gas sensor device according to any one of items 15 to 17. [Item 19] A receiving unit that receives first calibration information of a first gas sensor device. A calibration unit that calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received by the receiving unit. A gas sensor device comprising [Item 20] The first gas sensor device has a first gas sensor, The gas sensor device according to item 19, wherein the measurement target for which the gas concentration is calculated based on the output of the first gas sensor and the measurement target for which the gas concentration is calculated based on the output of the second gas sensor are the same. [Item 21] The gas sensor device according to item 20, wherein the first gas sensor is provided in a mobile terminal. [Item 22] The gas sensor device according to item 21, wherein the second gas sensor is disposed in an internal space of the measurement target for which the gas concentration is calculated based on the output of the second gas sensor. [Item 23] The receiving unit further receives reliability information indicating the calibration reliability of the first gas sensor device, The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor according to the calibration reliability of the first gas sensor device based on the received first calibration information. The gas sensor device according to any one of items 19 to 22. [Item 24] The second gas sensor is provided in a second gas sensor device, The gas sensor device according to item 23, wherein when the reliability of the self-calibration of the second gas sensor device is equal to or lower than a predetermined second threshold and the calibration reliability of the first gas sensor device exceeds a first threshold, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor according to the received first calibration information. [Item 25] The calibration unit compares the calibration reliability of the first gas sensor device received by the receiving unit with the calibration reliability of the second gas sensor device, and when the calibration reliability of the first gas sensor device is higher than the calibration reliability of the second gas sensor device, calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor according to the received first calibration information. The gas sensor device according to item 24. [Item 26] The apparatus further includes a storage unit that stores the reliability information received by the receiving unit. The calibration unit compares the calibration reliability of the first gas sensor device received by the receiving unit with the calibration reliability of the first gas sensor device stored in the storage unit. When the calibration reliability of the first gas sensor device received by the receiving unit is higher than the calibration reliability stored in the storage unit, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information. The gas sensor device according to item 24 or 25. [Item 27] The apparatus further includes a position information acquisition unit that acquires the position information of the second gas sensor device. The reliability information includes the position information of the first gas sensor device. The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information according to the distance between the position of the first gas sensor device and the position of the second gas sensor device acquired by the position information acquisition unit. The gas sensor device according to any one of items 24 to 26. [Item 28] When the distance is less than a predetermined distance, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor. The gas sensor device according to item 27. [Item 29] The receiving unit receives the first calibration information of each of the plurality of first gas sensor devices. The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information of each of the plurality of first gas sensor devices. The gas sensor device according to any one of items 23 to 28. [Item 30] The receiving unit receives the reliability information of each of the plurality of first gas sensor devices. The calibration unit weights the calibration reliability of each of the plurality of first gas sensor devices, and calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the weighted calibration reliability. The gas sensor device according to item 29. [Item 31] The calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the highest calibration reliability among the calibration reliabilities of each of the plurality of first gas sensor devices, according to the gas sensor device of item 30. [Item 32] A transmission step in which a transmission unit transmits first calibration information, where the first calibration information is calibration information for calibrating the gas concentration of a measurement target calculated based on the output of a first gas sensor. A reception step in which a reception unit receives the first calibration information transmitted in the transmission step. A calibration step in which a calibration unit calibrates the gas concentration of a measurement target calculated based on the output of a second gas sensor based on the first calibration information received in the reception step. A gas sensor calibration method comprising the above steps. [Item 33] The measurement target for which the gas concentration is calculated based on the output of the first gas sensor and the measurement target for which the gas concentration is calculated based on the output of the second gas sensor are the same, according to the gas sensor calibration method of item 32. [Item 34] The second gas sensor is provided in a second gas sensor device. The second gas sensor device is disposed in an internal space in the measurement target for which the gas concentration is calculated based on the output of the second gas sensor, according to the gas sensor calibration method of item 32 or 33. [Item 35] The first gas sensor is provided in a first gas sensor device. The transmission step is a step in which the transmission unit further transmits reliability information indicating the calibration reliability of the first gas sensor device. The receiving step is a step in which the receiving unit further receives the reliability information transmitted in the transmitting step. The calibration step is a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor according to the calibration reliability of the first gas sensor device based on the first calibration information received in the receiving step. The gas sensor calibration method according to item 34. [Item 36] In the calibration step, when the reliability of the self-calibration of the second gas sensor device is equal to or lower than a predetermined second threshold value and the calibration reliability of the first gas sensor device exceeds the first threshold value, the calibration unit calculates the gas concentration of the measurement target based on the output of the second gas sensor, and calibrates it based on the first calibration information received in the receiving step. The gas sensor calibration method according to item 35. [Item 37] In the calibration step, the calibration unit compares the calibration reliability of the first gas sensor device received in the receiving step with the calibration reliability of the second gas sensor device. When the calibration reliability of the first gas sensor device is higher than the calibration reliability of the second gas sensor device, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the receiving step. The gas sensor calibration method according to item 35 or 36. [Item 38] The method further includes a storage step in which the storage unit stores the reliability information received in the receiving step. The calibration step is a step in which the calibration unit compares the calibration reliability of the first gas sensor device received in the reception step with the calibration reliability of the first gas sensor device stored in the storage step, and when the calibration reliability of the first gas sensor received in the reception step is higher than the calibration reliability stored in the storage step, calibrating the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the reception step. The gas sensor calibration method according to item 36 or 37. [Item 39] The position information acquisition step further includes a position information acquisition unit that acquires the position information of the second gas sensor device. The reliability information includes the position information of the first gas sensor device. The calibration step is a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information according to the distance between the position of the first gas sensor device and the position of the second gas sensor device acquired in the position information acquisition step. The gas sensor calibration method according to any one of items 36 to 38. [Item 40] The calibration step is the gas sensor calibration method according to item 39, in which when the distance is less than a predetermined distance, the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the received first calibration information. [Item 41] The reception step is a step in which the reception unit receives the first calibration information of each of the plurality of first gas sensor devices. The calibration step is a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information of each of the plurality of first gas sensor devices received in the reception step. The gas sensor calibration method according to any one of items 36 to 40. [Item 42] The transmission step is a step in which the transmission unit further transmits the reliability information of each of the plurality of first gas sensor devices. The reception step is a step in which the reception unit further receives each of the reliability information transmitted in the transmission step. The calibration step is a step in which the calibration unit weights the calibration reliability of each of the plurality of first gas sensor devices, and calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the weighted calibration reliability. The gas sensor calibration method according to Item 41. [Item 43] The calibration step is a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the highest calibration reliability among the calibration reliabilities of each of the plurality of first gas sensor devices. The gas sensor calibration method according to Item 42. [Item 44] A transmission step in which a transmission unit transmits first calibration information to a second gas sensor device is provided. The first calibration information is calibration information for calibrating the gas concentration of the measurement target calculated based on the output of the first gas sensor. Gas sensor calibration method. [Item 45] The second gas sensor device has a second gas sensor. The measurement target for which the gas concentration is calculated based on the output of the first gas sensor and the measurement target for which the gas concentration is calculated based on the output of the second gas sensor are the same. The gas sensor calibration method according to Item 44. [Item 46] The first gas sensor is provided in the first gas sensor device. The transmission step is a step in which the transmission unit further transmits reliability information indicating the calibration reliability of the first gas sensor device to the second gas sensor device. The gas sensor calibration method according to Item 44 or 45. [Item 47] A receiving step in which a receiving unit receives first calibration information of a first gas sensor device; A calibration step in which a calibration unit calibrates a gas concentration of a measurement target calculated based on an output of a second gas sensor based on the first calibration information received by the receiving unit; A gas sensor calibration method comprising: [Item 48] The first gas sensor device has a first gas sensor, The gas sensor calibration method according to item 47, wherein a measurement target for which a gas concentration is calculated based on an output of the first gas sensor and the measurement target for which a gas concentration is calculated based on an output of the second gas sensor are the same. [Item 49] The gas sensor calibration method according to item 47 or 48, wherein the second gas sensor is disposed in an internal space in the measurement target for which a gas concentration is calculated based on an output of the second gas sensor. [Item 50] The receiving step is a step in which the receiving unit further receives reliability information indicating a calibration reliability of the first gas sensor device, The calibration step is a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the receiving step according to the calibration reliability of the first gas sensor device. The gas sensor calibration method according to any one of items 47 to 49. [Item 51] The second gas sensor is provided in a second gas sensor device, The calibration step is a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the receiving step when a self-calibration reliability of the second gas sensor device is equal to or less than a predetermined second threshold value and a calibration reliability of the first gas sensor device exceeds a first threshold value. The gas sensor calibration method according to item 50. [Item 52] The calibration step is a step in which the calibration unit compares the calibration reliability of the first gas sensor device received in the reception step with the calibration reliability of the second gas sensor device, and when the calibration reliability of the first gas sensor device is higher than the calibration reliability of the second gas sensor device, calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the reception step. The gas sensor calibration method according to item 51. [Item 53] The method further includes a storage step in which the storage unit stores the reliability information received in the reception step. The calibration step is a step in which the calibration unit compares the calibration reliability of the first gas sensor device received in the reception step with the calibration reliability of the first gas sensor device stored in the storage step, and when the calibration reliability of the first gas sensor device received in the reception step is higher than the calibration reliability stored in the storage step, calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the reception step. The gas sensor calibration method according to item 51 or 52. [Item 54] The method further includes a position information acquisition step in which a position information acquisition unit acquires the position information of the second gas sensor device. The reliability information includes the position information of the first gas sensor device. The calibration step is a step in which the calibration unit calibrates the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information received in the reception step according to the distance between the position of the first gas sensor device and the position of the second gas sensor device acquired in the position information acquisition step. The gas sensor calibration method according to any one of items 51 to 53. [Item 55] The calibration step is the step of calibrating the gas concentration of the measurement target calculated based on the output of the second gas sensor by the calibration unit when the distance is less than a predetermined distance, according to the gas sensor calibration method described in item 54. [Item 56] The receiving step is the step of the receiving unit receiving the first calibration information in each of the plurality of first gas sensor devices. The calibration step is the step of the calibration unit calibrating the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the first calibration information of each of the plurality of first gas sensor devices received in the receiving step. The gas sensor calibration method according to any one of items 50 to 55. [Item 57] The receiving step is the step of the receiving unit further receiving the reliability information of each of the plurality of first gas sensor devices. The calibration step is the step of the calibration unit weighting the calibration reliability of each of the plurality of first gas sensor devices and calibrating the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the weighted calibration reliability. The gas sensor calibration method according to item 56. [Item 58] The calibration step is the step of the calibration unit calibrating the gas concentration of the measurement target calculated based on the output of the second gas sensor based on the highest calibration reliability among the calibration reliabilities of each of the plurality of first gas sensor devices, according to the gas sensor calibration method described in item 53. [Item 59] A gas sensor calibration program for causing a computer to execute the gas sensor calibration method according to any one of items 32 to 43. [Item 60] A gas sensor calibration program for causing a computer to execute the gas sensor calibration method according to any one of items 44 to 46. [Item 61] A gas sensor calibration program for causing a computer to execute the gas sensor calibration method according to any one of items 47 to 58.

Explanation of Signs

[0226] 10 ··· Receiver, 11 ··· First gas sensor, 12 ··· Display unit, 13 ··· Transmitter, 14 ··· Calibration unit, 15 ··· Control unit, 16 ··· Position information acquisition unit, 20 ··· Receiver, 21 ··· Second gas sensor, 22 ··· Display unit, 23 ··· Transmitter, 24 ··· Calibration unit, 25 ··· Control unit, 26 ··· Position information acquisition unit, 30 ··· Receiver, 31 ··· Third gas sensor, 32 ··· Display unit, 33 ··· Transmitter, 34 ··· Calibration unit, 35 ··· Control unit, 90 ··· Living body, 100 ··· First gas sensor device, 110 ··· Arithmetic unit, 112 ··· Storage unit, 114 ··· AD conversion unit, 120 ··· Arithmetic unit, 122 ··· Storage unit, 124 ··· AD conversion unit, 150 ··· Gas sensor device, 200 ··· Second gas sensor device, 250 ··· Gas sensor device, 300 ··· Third gas sensor device, 400 ··· Gas sensor system, 501 ··· Measurement target, 502 ··· Measurement target, 503 ··· Gas, 504 ··· Gas, 505 ··· Measurement target, 508 ··· Internal space, 600 ··· Gas sensor, 2200 ··· Computer, 2201 ··· DVD-ROM, 2210 ··· Host controller, 2212 ··· CPU, 2214 ··· RAM, 2216 ··· Graphics controller, 2218 ··· Display device, 2220 ··· Input / output controller, 2222 ··· Communication interface, 2224 ··· Hard disk drive, 2226 ··· DVD-ROM drive, 2230 ··· ROM, 2240 ··· Input / output chip, 2242 ··· Keyboard

Claims

1. A transmitter that transmits first calibration information to a second gas sensor device, the first calibration information is calibration information for calibrating a concentration of the gas to be measured that is calculated based on an output of the first gas sensor; Gas sensor device.

2. The second gas sensor device has a second gas sensor, 2. The gas sensor device according to claim 1, wherein the measurement target, the gas concentration of which is calculated based on the output of the first gas sensor, and the measurement target, the gas concentration of which is calculated based on the output of the second gas sensor, are the same.

3. A gas sensor device as described in claim 2, wherein the second gas sensor is provided in a mobile terminal.

4. The first gas sensor is provided in a first gas sensor device, 4. The gas sensor device according to claim 1, wherein the transmitter further transmits reliability information indicating calibration reliability of the first gas sensor device to the second gas sensor device.

5. A receiving unit that receives first calibration information of the first gas sensor device; a calibration unit that calibrates the concentration of the gas to be measured, which is calculated based on the output of the second gas sensor, based on the first calibration information received by the receiving unit; A gas sensor device comprising:

6. The first gas sensor device has a first gas sensor, 6. The gas sensor device according to claim 5, wherein a measurement target whose gas concentration is calculated based on the output of said first gas sensor and a measurement target whose gas concentration is calculated based on the output of said second gas sensor are the same.

7. A gas sensor device as described in Claim 6, wherein the first gas sensor is provided in a mobile terminal.

8. A gas sensor device as described in Claim 7, wherein the second gas sensor is arranged in an internal space of the measurement object whose gas concentration is calculated based on the output of the second gas sensor.

9. The receiving unit further receives reliability information indicating a calibration reliability of the first gas sensor device, the calibration unit calibrates the concentration of the gas to be measured, which is calculated based on the output of the second gas sensor, based on the received first calibration information in accordance with the calibration reliability of the first gas sensor device. The gas sensor device according to any one of claims 5 to 8.

10. The second gas sensor is provided in a second gas sensor device, 10. The gas sensor device according to claim 9, wherein, when the reliability of the self-calibration of the second gas sensor device is equal to or less than a predetermined second threshold and the calibration reliability of the first gas sensor device exceeds a predetermined first threshold, the calibration unit calibrates the concentration of the gas to be measured, which is calculated based on the output of the second gas sensor, based on the received first calibration information.

11. A gas sensor device as described in claim 10, wherein the calibration unit compares the calibration reliability of the first gas sensor device received by the receiving unit with the calibration reliability of the second gas sensor device, and if the calibration reliability of the first gas sensor device is higher than the calibration reliability of the second gas sensor device, calibrates the gas concentration of the measurement object calculated based on the output of the second gas sensor based on the received first calibration information.

12. Further comprising a storage unit that stores the reliability information received by the receiving unit, the calibration unit compares the calibration reliability of the first gas sensor device received by the receiving unit with the calibration reliability of the first gas sensor device stored in the memory unit, and if the calibration reliability of the first gas sensor device received by the receiving unit is higher than the calibration reliability stored in the memory unit, calibrates the gas concentration of the measurement object calculated based on the output of the second gas sensor based on the received first calibration information. The gas sensor device according to claim 10.

13. Further comprising a location information acquisition unit that acquires location information of the second gas sensor device, the reliability information includes position information of the first gas sensor device, the calibration unit calibrates the gas concentration of the measurement target, which is calculated based on the output of the second gas sensor, based on the distance between the position of the first gas sensor device and the position of the second gas sensor device acquired by the position information acquisition unit, based on the received first calibration information. The gas sensor device according to claim 10.

14. A gas sensor device as described in Claim 13, wherein the calibration unit calibrates the gas concentration of the measurement object calculated based on the output of the second gas sensor when the distance is less than a predetermined distance.

15. The receiving unit receives the first calibration information of each of the plurality of first gas sensor devices, the calibration unit calibrates the gas concentration of the measurement object calculated based on the output of the second gas sensor, based on the first calibration information of each of the plurality of first gas sensor devices.

10. The gas sensor device according to claim 9.

16. The receiving unit receives reliability information of each of the plurality of first gas sensor devices, the calibration unit weights the calibration reliability of each of the plurality of first gas sensor devices, and calibrates the gas concentration of the measurement object calculated based on the output of the second gas sensor based on the weighted calibration reliability.

16. The gas sensor device according to claim 15.

17. A gas sensor device as described in Claim 16, wherein the calibration unit calibrates the gas concentration of the object to be measured, which is calculated based on the output of the second gas sensor, based on the highest calibration reliability among the calibration reliability of each of the multiple first gas sensor devices.

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