Odor detection system, odor detection method, and program

Abstract

The substance sensor (10) has a sensing film (11(a~j)) that reacts to each substance (a~j) that constitutes the odor of the gas, and detects a reaction value of the sensing film (11(a~j)). The odor determination section (22) determines the odor of the gas based on the reaction value of the sensing film (11(a~j)) detected by the substance sensor (10). The reaction value calculation section (23) calculates a reaction value for each odor determined by the odor determination section (22) based on the reaction value of the sensing film (11(a~j)) detected by the substance sensor (10). The proportion calculation section (24) calculates a proportion of the reaction value for each odor determined by the odor determination section (22) calculated by the reaction value calculation section (23) in a total of the reaction values for each odor. The display section (25) displays the proportion of the reaction value for each odor calculated by the proportion calculation section (24) in a manner that enables comparison between the odors determined by the odor determination section (22).

Description

TECHNICAL FIELD

[0001] The present application relates to an odor detection system, an odor detection method, and a program. BACKGROUND

[0002] In Patent Literature 1, a chemical sensor device that detects a substance based on an amount of change in a resonance frequency generated when the substance is adsorbed to or desorbed from a sensing film is disclosed. The chemical sensor device is provided with a plurality of oscillators each of which is provided with a sensing film that exhibits a desorption-adsorption characteristic with respect to a different substance. Each of the oscillators is provided with a piezoelectric substrate that is deformed by an alternating voltage applied thereto, and each of the oscillators vibrates. If a substance is adsorbed to or desorbed from the sensing film, the resonance frequency of each of the oscillators changes. Thus, the substance can be detected.

[0003] According to the chemical sensor device, an odor composed of a plurality of substances can be detected. The odor of a gas is determined based on a pattern of the response values of the sensing films, i.e., a composition ratio of the plurality of substances that compose the odor.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Application Publication No. 2009-204584 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] However, in the above-described chemical sensor device, there is a problem in that the detection result of the odor is deviated even if the composition ratio of the substances is the same, depending on the difference in the situation at the time of detection. The reason for this is that, for example, the sensitivity of the sensing film changes depending on the number of measurements or environmental conditions such as humidity.

[0009] The present application has been achieved in light of the above-described actual circumstances, and aims to provide an odor detection system, an odor detection method, and a program that can reduce the deviation in the detection result of the odor.

[0010] SOLUTION TO THE PROBLEM

[0011] To achieve the above-described object, an odor detection system according to a first aspect of the present application is provided with:

[0012] a substance sensor that has a sensing film that reacts to each of substances that compose an odor of a gas with respect to the substance, and detects a response value of the sensing film;

[0013] an odor determination unit that determines the odor of the gas based on the response value of the sensing film detected by the substance sensor;

[0014] a reaction value calculation section that calculates a reaction value for each of the odors determined by the odor determination section based on the reaction values of the sensing films detected by the substance sensor;

[0015] a proportion calculation section that calculates a proportion of the reaction value for each of the odors determined by the odor determination section calculated by the reaction value calculation section in the total of the reaction values for each of the odors; and

[0016] a display section that displays the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison between the odors determined by the odor determination section.

[0017] In this case, the display section can display the reaction value for each of the odors calculated by the reaction value calculation section in a manner that enables comparison between the odors determined by the odor determination section.

[0018] The display section can display the reaction value for each of the odors calculated by the reaction value calculation section and the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison.

[0019] The display section can display the reaction value for each of the odors calculated by the reaction value calculation section and the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison.

[0020] The display section can display at least one of the reaction value for each of the odors calculated by the reaction value calculation section and the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison between different detection time points based on the reaction values of the sensing films stored in the storage section.

[0021] The odor detection system according to the second aspect of the present disclosure includes:

[0022] a substance sensor that has a sensing film that reacts with each substance of an odor of a gas for each substance of the odor of the gas and detects a reaction value of the sensing film;

[0023] a coefficient correction section that corrects the reaction value of the sensing film detected by the substance sensor with a coefficient of each sensing film determined in accordance with an environmental condition around the sensing film for each sensing film; and

[0024] an odor determination section that determines the odor of the gas based on the reaction value of the sensing film corrected by the coefficient correction section.

[0025] In this case, it can also be that

[0026] a reaction value calculation section that calculates a reaction value for each of the odors determined by the odor determination section based on the reaction values of the sensing films corrected by the coefficient correction section;

[0027] a display section that displays the reaction value for each of the odors calculated by the reaction value calculation section in a manner that enables comparison between the odors determined by the odor determination section.

[0028] In addition, it can also be that a proportion calculation section that calculates a proportion of the reaction value for each of the odors determined by the odor determination section calculated by the reaction value calculation section in a total of the reaction values for each of the odors,

[0029] the display section displays the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison between the odors determined by the odor determination section.

[0030] It can also be that the display section displays the reaction value for each of the odors calculated by the reaction value calculation section and the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison.

[0031] It can also be that a storage section that stores the reaction values of the sensing films detected by the substance sensor in correspondence with the detection time,

[0032] the display section displays at least one of the reaction value for each of the odors calculated by the reaction value calculation section and the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison between different detection time points based on the reaction values of the sensing films stored in the storage section.

[0033] It can also be that an environment sensor that detects the environmental conditions,

[0034] the coefficient correction section corrects the reaction values of the sensing films detected by the substance sensor for each of the sensing films in accordance with the coefficient of each of the sensing films determined in accordance with the environmental conditions detected by the environment sensor.

[0035] It can also be that the environmental conditions include at least one of humidity, temperature, and air pressure.

[0036] The odor detection method according to the third aspect of the present application is an odor detection method executed by an odor detection system for detecting an odor of a gas, the odor detection method comprising:

[0037] an odor determination step of determining an odor of the gas on the basis of a reaction value of a sensing film detected by a substance sensor having the sensing film that reacts with each substance constituting the odor of the gas;

[0038] a reaction value calculation step of calculating a reaction value for each odor determined by the odor determination step on the basis of the reaction value of the sensing film detected by the substance sensor;

[0039] a proportion calculation step of calculating a proportion of the reaction value for each odor determined by the odor determination step in a total of the reaction values for each odor calculated by the reaction value calculation step; and

[0040] a display step of displaying the proportion of the reaction value for each odor calculated by the proportion calculation step in a manner that enables comparison between the odors determined by the odor determination step.

[0041] The odor detection method according to the fourth aspect of the present application is an odor detection method executed by an odor detection system for detecting an odor of a gas, the odor detection method comprising:

[0042] a coefficient correction step of correcting a reaction value of a sensing film detected by a substance sensor having the sensing film for each substance constituting an odor of a gas with a coefficient of each sensing film determined in accordance with an environmental condition around the sensing film, for each sensing film that reacts with the substance;

[0043] an odor determination step of determining an odor of the gas on the basis of the reaction value of the sensing film corrected by the coefficient correction step;

[0044] a reaction value calculation step of calculating a reaction value for each odor determined by the odor determination step on the basis of the reaction value of the sensing film corrected by the coefficient correction step; and

[0045] a display step of displaying the reaction value for each odor calculated by the reaction value calculation step in a manner that enables comparison between the odors determined by the odor determination step.

[0046] The program according to the fifth aspect of the present application causes a computer to function as:

[0047] an odor determining section that determines an odor of a gas based on a reaction value of a sensing film detected by a substance sensor having the sensing film that reacts with each substance constituting the odor of the gas;

[0048] a reaction value calculating section that calculates a reaction value for each odor determined by the odor determining section based on the reaction value of the sensing film detected by the substance sensor;

[0049] a proportion calculating section that calculates a proportion of the reaction value for each odor determined by the odor determining section in a total of the reaction values for each odor; and

[0050] a display section that displays the proportion of the reaction value for each odor calculated by the proportion calculating section in a manner that enables comparison between the odors determined by the odor determining section.

[0051] The program according to the sixth aspect of the present application causes a computer to function as:

[0052] a coefficient correcting section that corrects, for each sensing film that reacts with a substance constituting an odor of a gas, a coefficient of each sensing film determined in accordance with an environmental condition around the sensing film, for a substance sensor having the sensing film for each substance;

[0053] an odor determining section that determines an odor of the gas based on a reaction value of the sensing film corrected by the coefficient correcting section;

[0054] a reaction value calculating section that calculates a reaction value for each odor determined by the odor determining section based on the reaction value of the sensing film corrected by the coefficient correcting section; and

[0055] a display section that displays the reaction value for each odor calculated by the reaction value calculating section in a manner that enables comparison between the odors determined by the odor determining section.

[0056] Effects of the Invention

[0057] According to the present application, it is possible to reduce a deviation in a detection result of an odor regardless of the number of measurements or an environmental condition. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 is a block diagram showing a configuration of an odor detection system according to Embodiment 1 of the present application.

[0059] Figure 2 is a block diagram showing a configuration of an odor detection system according to Embodiment 2 of the present application. Figure 1FIG. 1 is a diagram showing an example of a pattern of reaction values of a sensing film detected by a substance sensor of an odor detection system according to the present application.

[0060] Figure 3 FIG. 2 is a diagram showing an example of a column chart in which reaction values of a sensing film are displayed for each odor.

[0061] Figure 4 FIG. 3 is a diagram showing an example of a column chart in which reaction values for each odor determined are displayed in a manner to compare among odors.

[0062] Figure 5 FIG. 4 is a diagram showing an example of a column chart in which proportions of reaction values of determined odors are displayed in a manner to compare among odors.

[0063] Figure 6A FIG. 5 is a diagram showing an example of a column chart in which a first measurement result and a second measurement result are displayed in a manner to compare by absolute amount.

[0064] Figure 6B FIG. 6 is a diagram showing an example of a column chart in which a first measurement result and a second measurement result are displayed in a manner to compare by percentage.

[0065] Figure 7 FIG. 7 is a block diagram showing a hardware structure of an information processing apparatus of an odor detection system according to the present application. Figure 1

[0066] FIG. 8 is a flowchart showing a detection process in the odor detection system according to the present application. Figure 8 Figure 1 FIG. 9 is a flowchart showing an analysis display process in the odor detection system according to the present application.

[0067] Figure 9 Figure 1 FIG. 10 is a chart showing an example of data that can be analyzed.

[0068] Figure 10A FIG. 11 is a chart showing an example of data that can be analyzed.

[0069] Figure 10B FIG. 12 is a chart showing another example of data that can be analyzed.

[0070] Figure 11A FIG. 13 is a chart showing another example of data that can be analyzed.

[0071] Figure 11B FIG. 14 is a chart showing another example of data that can be analyzed.

[0072] Figure 12 FIG. 15 is a block diagram showing a structure of an odor detection system according to Embodiment 2 of the present application.

[0073] Figure 13 ​​is a graph showing the reaction value for each odor in the case of different humidity compared with the reaction value before and after correction.

[0074] Figure 14 is a graph showing the relationship between humidity and the coefficient of the sensing film.

[0075] Figure 15 is a graph showing Figure 12 a flowchart of the detection process in the odor detection system. DETAILED DESCRIPTION

[0076] Hereinafter, an embodiment of the present application will be described in detail with reference to the accompanying drawings. In each drawing, the same or equivalent parts are denoted by the same reference numerals.

[0077] Embodiment 1

[0078] First, Embodiment 1 of the present application will be described. As shown in Figure 1 , an odor detection system 1 is provided with a substance sensor 10 and an information processing device 20. The odor detection system 1 detects a plurality of substances a to j that constitute the odor of a gas.

[0079] The substance sensor 10 has, for each of the substances a to j, a sensing film 11 that reacts to the substance a to j, respectively. Hereinafter, each sensing film 11 will also be referred to as a sensing film a to j in a manner corresponding to the substance a to j that reacts thereto, respectively. The substance sensor 10 detects a reaction value of the sensing film a to j and outputs a signal indicating the detected reaction value.

[0080] The information processing device 20 performs information processing for detecting the odor of a gas. The information processing device 20 is provided with a storage section 21, an odor determination section 22, a reaction value calculation section 23, a proportion calculation section 24, and a display section 25.

[0081] The storage section 21 stores the reaction value of the sensing film a to j detected by the substance sensor 10 each time detection is performed, in correspondence with the time of detection. The storage section 21, for example, stores the reaction value of the sensing film a to j that reacts to the substance a to j output from the substance sensor 10 in association with the time (detection time point) of detection. Here, the reaction value of the sensing film 11 that reacts to the substance a to j is, for example, a pattern as shown in Figure 2 . Further, Figure 2 the reaction value of the ordinate axis indicates the signal level of the detection signal of the substance sensor 10 that changes in accordance with the reaction of the sensing film 11 in the substance sensor 10 and the substance.

[0082] Returning to Figure 1The odor determining section 22 determines the odor contained in the gas on the basis of the reaction values of the sensing films a to j stored in the storage section 21 after being detected by the substance sensor 10. Here, for example, it is assumed that odor A contains substances a, b, c, odor B contains substances d, e, and odor C contains substances f, g, h. Also, it is assumed that the odor determining section 22 stores a reference pattern of the reaction values of the substances a, b, c of odor A, a reference pattern of the reaction values of the substances d, e of odor B, and a reference pattern of the reaction values of the substances f, g, h of odor C.

[0083] The odor determining section 22 determines the odor contained in the gas by judging whether the pattern of the reaction values of the detected substances shown in FIG. 6 matches the pattern of odor A or whether it matches the pattern of odor B or whether it matches the pattern of odor C on the basis of the reaction values of the sensing films a to j stored in the storage section 21. Figure 2 Specifically, the odor determining section 22 compares the proportions of the reaction values of the sensing films a, b, c associated with odor A with the reference pattern of the proportions of the reaction values of the sensing films a, b, c of odor A to determine whether odor A is contained in the gas. Also, the odor determining section 22 compares the proportions of the reaction values of the sensing films d, e associated with odor B with the reference pattern of the proportions of the reaction values of the sensing films d, e of odor B to determine whether odor B is contained in the gas. Also, the odor determining section 22 compares the proportions of the reaction values of the sensing films f, g, h associated with odor C with the reference pattern of the proportions of the reaction values of the sensing films f, g, h of odor C to determine whether odor C is contained in the gas. Here, it is assumed that the pattern of the reaction values shown in FIG. 6 matches the patterns of odors A, B, C, and that odors A, B, C are determined. Figure 2

[0084] Returning to Figure 1 , the reaction value calculating section 23 calculates the reaction value for each odor determined by the odor determining section 22 on the basis of the reaction values of the sensing films a to j detected by the substance sensor 10. Specifically, the reaction value calculating section 23 calculates the value obtained by adding up the reaction values of the sensing films a to j for each odor as the reaction value for each odor. For example, as shown in FIG. 7, the reaction value calculating section 23 adds up the reaction values of the substances a, b, c associated with odor A to calculate the sum, adds up the reaction values of the substances d, e associated with odor B to calculate the sum, and adds up the reaction values of the substances f, g, h associated with odor C to calculate the sum. Figure 3 Figure 4 In this case, the sums are displayed as the reaction values for each odor.

[0085] ​​Further, the reaction value for each odor is not limited to the total value of the reaction values of the sensing films 11. It can also be the average value of the reaction values of the sensing films 11. The reaction value for each odor can be a representative value indicating the level of the reaction value of the sensing film 11 that reacts with the substance constituting the odor.

[0086] Returning to Figure 1 , the proportion calculating section 24 calculates the proportion of the reaction value for each odor calculated by the reaction value calculating section 23 in the total of the reaction values for each odor determined by the odor determining section 22. For example, the proportion calculating section 24 converts the reaction values of the odors A, B, C shown in Figure 4 to the proportions of the reaction values of the odors A, B, C shown in Figure 5 to the total of the reaction values of the whole.

[0087] Returning to Figure 1 , the display section 25 displays the proportions of the reaction values for each odor calculated by the proportion calculating section 24 in a manner that enables comparison between the odors determined by the odor determining section 22. For example, the display section 25 displays a column chart as shown in Figure 5 . According to this column chart, the proportions of the odors A, B, C of the gas to the whole can be compared.

[0088] In addition, the display section 25 can also display other contents. For example, the display section 25 can display the reaction values for each odor calculated by the reaction value calculating section 23 in a manner that enables comparison between the odors determined by the odor determining section 22. For example, the display section 25 displays a column chart as shown in Figure 4 . According to this column chart, the reaction values of the odors A, B, C of the gas can be compared between the odors A, B, C.

[0089] Further, the display section 25 can display the reaction values for each odor calculated by the reaction value calculating section 23 and the proportions of the reaction values for each odor calculated by the proportion calculating section 24 in a manner that enables comparison. The display section 25, for example, displays a column chart indicating the reaction values for each of the odors A, B, C as shown in Figure 4 and a column chart indicating the proportions of the reaction values for each of the odors A, B, C as shown in Figure 5 in a manner that enables comparison.

[0090] Further, the display section 25 can display at least one of the reaction values for each odor calculated by the reaction value calculating section 23 and the proportions of the reaction values for each odor calculated by the proportion calculating section 24 in a manner that enables comparison between different detection time points, based on the reaction values of the sensing films a to j stored in the storage section 21. For example, as shown in Figure 6AAs shown, the display unit 25 can compare and display the reaction values ​​for each of the odors A, B, and C in the first measurement and the second measurement for the gas with the same composition. Figure 6B As shown, the display unit 25 can compare and display the ratio of the reaction values ​​for each of the odors A, B, and C in the first measurement and the second measurement for the gas with the same composition. Figure 6A The comparison shown and Figure 6B The comparison shown is displayed.

[0091] By performing such a display, it is possible to understand that although the sensitivity of the sensing film 11 decreases in the second measurement relative to the first measurement, and the reaction value for each of odors A, B, and C decreases, when the first measurement and the second measurement are compared in terms of the ratio of the reaction value for each odor, the ratio of odors A, B, and C is the same.

[0092] Furthermore, the comparison at different detection time points is not limited to two, and comparison can also be performed at three or more detection time points.

[0093] The function of the information processing device 20 of the above-mentioned odor detection system 1 is achieved by Figure 7 The hardware structure shown is used to implement it. Figure 7 As shown, the odor detection system 1 includes a control unit 31, a memory 32, an external storage device 33, an operation unit 34, a display 35, and an input / output unit 36 ​​as its hardware configuration. The memory 32, the external storage device 33, the operation unit 34, the display 35, and the input / output unit 36 ​​are all connected to the control unit 31 via an internal bus 30.

[0094] The control unit 31 includes a CPU (Central Processing Unit). The CPU executes processing according to a program 39 stored in the external storage device 33, thereby achieving Figure 1 The components of the odor detection system 1 are shown.

[0095] The memory 32 includes a random-access memory (RAM). A program 39 stored in the external storage device 33 is loaded into the RAM of the memory 32. The CPU executes the program 39 loaded into the RAM. The memory 32 is also used as a work area (temporary data storage area) for the control unit 31.

[0096] The external storage device 33 has a nonvolatile memory such as a flash memory, a hard disk, a DVD-RAM (Digital Versatile Disc Random-Access Memory), a DVD-RW (Digital Versatile Disc ReWritable), and the like. In the nonvolatile memory of the external storage device 33, a program 39 for causing the control section 31 to execute is stored in advance, and the program 39 is read into the memory 32. In addition, the external storage device 33 supplies data used when the program 39 is executed to the control section 31 and stores data supplied from the control section 31, in accordance with an instruction of the control section 31.

[0097] In the present embodiment, the storage section 21, the odor determination section 22, the reaction value calculation section 23, and the proportion calculation section 24 of the odor detection system 1 correspond to the control section 31, the memory 32, and the external storage device 33.

[0098] The operation section 34 is a human-machine interface operated by an operator. The operation section 34 has a pointing device such as a keyboard and a mouse, and a keyboard. An operation input to the operation section 34 is sent to the control section 31. The control section 31 executes the program 39 in accordance with the content of the operation input.

[0099] The display 35 is a human-machine interface that displays an image. The display 35 has a CRT (Cathode Ray Tube) or an LCD (Liquid Crystal Display). In the display 35, at least one of the reaction value of the detected odor and the proportion of the reaction value of the odor is displayed. The display 35 corresponds to the display section 25. In addition, the operation section 34 and the display 35 can be integrated as one as a touch panel.

[0100] The input-output section 36 is an interface that enables information input and output to the substance sensor 10. A detection command is output to the substance sensor 10 via the input-output section 36, and a signal indicating the reaction value of the sensing film 11 from the substance sensor 10 is input.

[0101] In addition, the external storage device 33 can be connected with a non-transitory recording medium 37. The program 39 is stored in the recording medium 37. The program 39 can also be transferred from the recording medium 37 to the external storage device 33 and written.

[0102] Next, the processing of the odor detection system 1 according to the first embodiment of the present invention, that is, the odor detection method performed by the odor detection system 1 for detecting gas odors, will be described. This processing is broadly divided into a detection process for detecting the reaction values ​​of the sensing films a-j by the substance sensor 10, and an analysis and display process for the odor based on the reaction values ​​of the sensing films a-j detected by the substance sensor 10.

[0103] (Detection and processing)

[0104] First, the detection process is described. Figure 8 As shown in FIG. 1 , the information processing device 20 waits until a detection instruction is inputted by an operation input (step S1; “No”). Figure 7 As shown, the control unit 31 waits for a detection instruction to be input through an operation input of the operation unit 34 .

[0105] When a detection instruction is inputted by an operation input (step S1; "Yes"), the information processing device 20 outputs a detection instruction to the material sensor 10 (step S2). Figure 7 As shown, when the operation input to the operating unit 34 is a detection command, the control unit 31 outputs the detection command to the substance sensor 10 via the input / output unit 36. The substance sensor 10 detects substances a-j contained in the gas and outputs signals representing the reaction values ​​of the respective sensitive films a-j to the input / output unit 36. The input / output unit 36 ​​converts these signals into reaction value data and transmits them to the control unit 31. Thus, in this embodiment, steps S1 and S2 correspond to the detection step.

[0106] During this period, the information processing device 20 waits until the reaction value is received (step S3; "No"). When the reaction value is received (step S3; "Yes"), the storage unit 21 stores the reaction value (step S4). Specifically, Figure 7 As shown, the control unit 31 stores the reaction value and the detection time in the external storage device 33 in association with each other.

[0107] After step S4 is completed, the information processing device 20 returns to step S1. Each time steps S1 to S4 are repeated, the substance sensor 10 detects the reaction values ​​of the sensitive films a to j, and the storage unit 21 stores the reaction values ​​of the sensitive films a to j associated with the detection time. The detection process is performed in this manner.

[0108] (Analysis and display processing)

[0109] Next, the analysis and display processing will be explained. Figure 9 As shown, first, the information processing device 20 waits until a display instruction is input (step S11; "No"). Figure 7As shown, the control section 31 waits for a display instruction input by operation of the operation section 34. Further, a detection time is specified in the display instruction. In the case where no specification is made, the latest reaction value of the sensor film a to j becomes the analysis target.

[0110] When a display instruction is input by operation of the operation section 34 (step Sll; "Yes"), the odor determination section 22 reads out the reaction value of the detection time specified in the display instruction from the storage section 21 (step S12). Here, specifically, as shown in Figure 7 As shown, the control section 31 reads out the reaction value of the sensor film a to j of the specified detection time from the external storage device 33 into the memory 32. In addition, the control section 31 reads out a pattern for reference of the reaction value of the odor A, B, C,... from the external storage device 33 into the memory 32.

[0111] Next, the odor determination section 22 determines the odor of the gas based on the reaction value of the sensor film a to j of the read-out detection time (step S13; odor determination step). Here, specifically, as shown in Figure 7 As shown, the control section 31 compares the pattern of the reaction value of the sensor film a to j read out into the memory 32 with the pattern for reference of the reaction value for each odor, to determine the odor contained in the gas. Here, for example, as shown in Figure 3 As shown, odor A is determined based on the pattern of the reaction value of the substances a, b, c, odor B is determined based on the pattern of the reaction value of the substances d, e, and odor C is determined based on the pattern of the reaction value of the substances f, g, h.

[0112] Next, the reaction value calculation section 23 calculates the reaction value for each odor determined by step S13 based on the reaction value of the sensor film a to j (step S14; reaction value calculation step). Here, specifically, as shown in Figure 7 As shown, the control section 31 aggregates and calculates the total value of the reaction value of the sensor film a to j saved in the memory 32 for each odor, and saves the total value as the reaction value for each odor in the memory 32. For example, as shown in Figure 3 As shown, with regard to odor A, the reaction value of odor A is calculated by aggregating the reaction value of the substances a, b, c, with regard to odor B, the reaction value of odor B is calculated by aggregating the reaction value of the substances d, e, and with regard to odor C, the reaction value of odor C is calculated by aggregating the reaction value of the substances f, g, h.

[0113] Further, the proportion calculating section 24 determines whether or not to display the proportion of the response value for each odor (step S15). In the case of displaying the proportion of the response value for each odor (step S15; "Yes"), the proportion calculating section 24 calculates the proportion of the response value for each odor determined by the step S13 in the total of the response values for each odor calculated by the step S14 (step S16; proportion calculating step). Here, specifically, as shown in Figure 7 , the control section 31 reads out the response value for each odor read out from the memory 32 to the memory 32 and calculates the total of the response values, calculates the proportion of the response value for each odor in the total and saves in the memory 32. Here, for example, as shown in Figure 5 , the proportion of odor A, the proportion of odor B, the proportion of odor C are calculated.

[0114] After that, the display section 25 performs display (step S17; display step). Here, specifically, as shown in Figure 7 , the control section 31 displays the bar chart shown in Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A or Figure 6B on the display 35 based on the response value for each odor calculated in the memory 32 or the proportion thereof in accordance with the content designated by the display instruction described above.

[0115] After the step S17 ends, the processing of the information processing apparatus 20 returns to the step S11. Like this, the analysis display processing is executed.

[0116] According to the odor detection system 1, it is possible to analyze the odor contained in the gas from various viewpoints. For example, when odor D (for example, mint) is newly added in the case where odor A (for example, garlic), odor B (for example, alcohol) and odor C (for example, cigarette) are detected in detecting the odor of halitosis, in the display of the response value shown in Figure 10A , only odor D is seen to be added, so it is difficult to grasp the effect of odor D. In contrast, as shown in Figure 10B , the result of displaying the proportion of the response value for each odor after converting to the proportion of the response value for each odor, the proportion of the response value of the other odors A, B, C decreases by including odor D in halitosis, so it is possible to grasp that the unpleasant odor can be alleviated from the display.

[0117] In addition, when odor D (e.g., mint) is newly added in a case where odor A (e.g., garlic), odor B (e.g., alcohol), and odor C (e.g., cigarette) are detected as the odor of the breath odor in the case of detecting the odor of the breath odor, it is confirmed that odor C is reduced in both the display of the reaction value of Figure 11A and the display of the proportion of the reaction value of Figure 11B However, when Figure 11A is compared with Figure 11B , it is easily confirmed that the proportion of odor C is greatly reduced in the display of the proportion of the reaction value for each odor shown in Figure 11B

[0118] In the present embodiment, the detection processing and the analysis display processing are event driven processing, and the detection and the analysis display can be performed separately. However, the detection processing and the analysis display processing can also be a series of processing.

[0119] In this way, the function of the information processing apparatus 20 is realized by the hardware resources shown in Figure 7 executing the detection processing program shown in Figure 8 and the analysis display processing program shown in Figure 9

[0120] As explained in detail above, according to the present embodiment, the accurate proportion of the odor contained in the gas can be obtained regardless of the change in the sensitivity of the sensing film 11 corresponding to the number of measurements, and thus the deviation of the detection results of odor A, B, C,... can be reduced. If the deviation of the detection results of odor A, B, C,... can be reduced, the change in the proportion of the odor caused by the addition or reduction of a new odor ( Figure 10A and Figure 10B ), the influence on other odors caused by the addition or reduction of a new odor ( Figure 11A and Figure 11B ) can be analyzed.

[0121] Furthermore, the odor detection system 1 according to the present embodiment can not display the reaction value for each odor, but can display only the proportion of the reaction value for each odor. In this case, the determination of step S15 is not performed.

[0122] Embodiment 2

[0123] Next, an embodiment 2 of the present application will be described. As shown in Figure 12 , the odor detection system 1 according to the present embodiment differs from the odor detection system 1 according to the above-described embodiment 1 in that the environment sensor 50 is provided and the information processing apparatus 20 is provided with the coefficient correction unit 27. The environment sensor 50 is, for example, a temperature sensor, a humidity sensor, or the like. Figure 7 ​​The odor detection system 1 is connected to the information processing apparatus 20 via the input / output section 36.

[0124] In the present embodiment, the odor detection system 1 is provided with an environmental sensor 50 for detecting an environmental condition of the gas. In the present embodiment, the environmental condition detected by the environmental sensor 50 is humidity. As for humidity, there are various kinds of humidity standards, but any humidity standard such as absolute humidity or relative humidity can be used.

[0125] The coefficient correction section 27 corrects the response value of each of the sensing films a to j detected by the material sensor 10 with a coefficient of each of the sensing films a to j decided according to the environmental condition of the surroundings of the sensing films a to j detected by the environmental sensor 50. For example, as shown in Figure 13 the response value of each of the sensing films a to j differs according to humidity even if the amount of the materials a to j contained in the gas is the same. Therefore, as shown in Figure 14 the coefficient correction section 27 has a coefficient that changes according to humidity for each of the sensing films a to j, and corrects the response value of each of the sensing films a to j by multiplying the response value by the coefficient corresponding to the humidity detected at that time. Thereby, for example, the response value of each of the sensing films a to j at humidity 70% is Figure 13 shown in the bar graph after correction. According to this bar graph, the response value of each of the sensing films a to j at humidity 70% is the same as the response value of each of the sensing films a to j at humidity 20%.

[0126] In other words, for the same kind of gas, the response value of each of the sensing films a to j is detected while changing the humidity, and the response value at each humidity is compared, whereby the coefficient can be found. That is, calibration like this can be performed. In this case, for example, the coefficient detection can be performed at humidity 20% and humidity 70%, and the detection result is interpolated at other humidities to find the respective coefficients.

[0127] Further, Figure 14 the coefficient shown in is the coefficient when the response value of each of the sensing films a to j at humidity 20% is set to 1, but the present application is not limited to this. For example, a coefficient for the other sensing films b to j when the response value of the sensing film a is always set to 1 can be used. Even if such a coefficient is used, the proportion of the response value of each of the sensing films a to j can be appropriately corrected, and furthermore, the proportion of the response value of each odor can be accurately displayed.

[0128] In addition, in Figure 14 the characteristics of the coefficient with respect to humidity are expressed in a linear manner, but the present application is not limited to this. The characteristics of the coefficient with respect to humidity can be non-linear.

[0129] As Figure 12As shown, the storage unit 21 stores the reaction values ​​of the sensing films a-j detected by the substance sensor 10 each time a detection is performed, corresponding to the time of detection. The odor identification unit 22 identifies the odor of the gas based on the reaction values ​​of the sensing films a-j corrected by the coefficient correction unit 27. The reaction value calculation unit 23 calculates the reaction value for each odor identified by the odor identification unit 22 based on the reaction values ​​of the sensing films a-j corrected by the coefficient correction unit 27. The display unit 25 displays the reaction value for each odor calculated by the reaction value calculation unit 23 in a manner that allows comparison between the odors identified by the odor identification unit 22.

[0130] Next, the processing of the odor detection system 1 according to this embodiment will be described. This odor detection system 1 is different from the odor detection system 1 according to the first embodiment described above in the detection processing.

[0131] like Figure 15 As shown in FIG. 1 , the information processing device 20 waits until a detection instruction is inputted by an operation input (step S1; “No”). Figure 7 As shown, the control unit 31 waits for a detection instruction to be input through an operation input of the operation unit 34 .

[0132] When a detection instruction is inputted by an operation input (step S1; "Yes"), the information processing device 20 outputs a detection instruction to the material sensor 10 (step S2). Figure 7 As shown, when the operation input to the operating unit 34 is a detection command, the control unit 31 outputs the detection command to the substance sensor 10 via the input / output unit 36. The substance sensor 10 detects substances a to j contained in the gas and outputs signals representing the reaction values ​​of the respective sensing films a to j to the input / output unit 36. The input / output unit 36 ​​converts these signals into data representing the reaction values ​​of the sensing films a to j and transmits the data to the control unit 31.

[0133] During this period, the information processing device 20 waits until the reaction value is received (step S3; "No"). When the reaction value is received (step S3; "Yes"), the information processing device 20 obtains the environmental conditions from the environmental sensor 50 (step S21). Specifically, Figure 7 As shown, the control unit 31 obtains humidity data from the environment sensor 50 via the input / output unit 36 ​​.

[0134] Next, the coefficient correction unit 27 determines the coefficient based on the acquired environmental information (step S22). For example, the coefficient correction unit 27 substitutes the humidity detected by the environmental sensor 50 into the Figure 14 The coefficient corresponding to the humidity is determined from the coefficient calculation formula shown in the graph shown.

[0135] Next, the coefficient correction unit 27 corrects the reaction value of the sensing film a to j detected by the substance sensor 10 with the coefficient of each of the sensing films a to j decided in accordance with the environmental condition for each of the sensing films a to j (step S23; coefficient correction step).

[0136] Next, the storage unit 21 stores the reaction value corrected with the coefficient (step S4). Specifically, as shown in Figure 7 the control unit 31 stores the reaction value corrected with the coefficient in association with the detection time in the external storage device 33.

[0137] After the end of step S4, the information processing apparatus 20 returns to step S1. Each time steps S1 to S3, S21, S22, S23, S4 are repeated, the corrected reaction value is stored in association with the detection time in the storage unit 21, that is, the external storage device 33. The detection processing is performed like this.

[0138] In the odor detection system 1 according to the present embodiment, as with the odor detection system 1 according to the above-described embodiment 1, the odor is determined by the odor determination unit 22 (step S13), the reaction value for each odor is calculated by the reaction value calculation unit 23 (step S14), the proportion is calculated by the proportion calculation unit 24 (step S16), and the display is performed by the display unit 25 (step S17), and the like as shown in Figure 9

[0139] In this analysis display processing, the display unit 25 can display the reaction value calculated by the reaction value calculation unit 23 in a manner that enables comparison between the determined odors. In addition, the display unit 25 displays the proportion of the reaction value for each odor in a manner that enables comparison between the determined odors. Furthermore, the display unit 25 displays the proportion of the reaction value for each odor and the reaction value for each odor in a manner that enables comparison. Furthermore, the display unit 25 displays at least one of the proportion of the reaction value for each odor and the reaction value for each odor in a manner that enables comparison between different detection time points.

[0140] In the present embodiment, the reaction value of the sensing film is corrected based on humidity. However, the present application is not limited to this. At least one of humidity, temperature, and air pressure is included in the environmental condition. In this case, the coefficient can be possessed for each of humidity, temperature, and air pressure, or the coefficient can be possessed in combination of the environmental conditions such as humidity and temperature.

[0141] ​In addition, in the present embodiment, the coefficient is determined based on the environmental condition around the sensing film 11 detected by the environmental sensor 50, but the present application is not limited to this. For example, the coefficient can be determined based on an environmental condition input into the operation section 34 or an environmental condition provided via a communication network.

[0142] As explained in detail above, according to the present embodiment, the deviation in the precision of the detection result of the odor can be reduced regardless of the change in the sensitivity of the sensing films a to j corresponding to the environmental condition.

[0143] In the odor detection system 1 related to the above-described embodiments, the reaction value for each odor can be displayed in various forms. Thereby, various analyses related to the odor detected by the odor detection system 1 can be supported. For example, the display of the reaction value for each odor can perform the sensitivity check of the sensing films a to j.

[0144] Further, in the above-described embodiments, the reaction value for each odor and the proportion thereof are displayed in a column chart, but the present application is not limited to this. For example, the data for each odor can be displayed in a pie chart, a line chart, or other display methods.

[0145] In a case where the odor is composed of one substance, the reaction value calculation section 23 is not needed, and the reaction value of the sensing film a to j is directly the reaction value of the corresponding odor.

[0146] In addition to this, the hardware structure or the software structure of the information processing apparatus 20 of the odor detection system 1 is an example, and can be arbitrarily changed and corrected.

[0147] The portion of the odor detection system 1 that becomes the center of processing, which is constituted by the control section 31, the memory 32, the external storage 33, the operation section 34, the display 35, and the input / output section 36, the internal bus 30, and the like, can be constructed as a dedicated system as described above, or can be realized using a general-purpose computer system. For example, a computer program for executing the above-described actions can be distributed by being stored in a non-transitory recording medium (a floppy disk, a CD-ROM, a DVD-ROM, or the like) that is readable by a computer, and the odor detection system 1 that executes the above-described processing can be constituted by installing the computer program in a computer. In addition, the computer program can be saved in a storage device of a server apparatus on a communication network such as the Internet, and the odor detection system 1 can be constituted by downloading or the like by a general-purpose computer system.

[0148] In a case where the function of the computer is realized by the sharing of an OS (operating system) and an application program, or the cooperation of the OS and the application program, only a part of the application program can be saved in a recording medium or a storage device.

[0149] A computer program can also be superimposed on a carrier and distributed via a communication network. For example, a computer program can also be posted on a bulletin board system (BBS) on a communication network, and the computer program can be distributed via the network. Furthermore, the computer program can be configured to be executed under the control of an OS by starting the computer program, like other application programs, so that the above-described processing can be performed.

[0150] The present application can be variously embodied and modified without departing from the broader spirit and scope of the present application. In addition, the above-described embodiments are merely illustrative of the present application and do not limit the scope of the present application. That is, the scope of the present application is not represented by the embodiments, but by the claims. Also, various modifications made within the scope of the claims and in the equivalent of the inventive concept are to be regarded as being within the scope of the present application.

[0151] Further, with respect to the present application, priority is claimed on Japanese Patent Application No. 2020-67098, filed April 2, 2020, the specification, claims, and drawings of which are hereby incorporated by reference in their entirety.

[0152] Industrial Applicability

[0153] The present application can be applied to detection of an odor composed of a plurality of substances.

[0154] Explanation of Reference Numerals

[0155] 1: odor detection system; 10: substance sensor; 11(a-j): sensing film; 20: information processing device; 21: storage section; 22: odor determination section; 23: reaction value calculation section; 24: proportion calculation section; 25: display section; 27: coefficient correction section; 30: internal bus; 31: control section; 32: memory; 33: external storage device; 34: operation section; 35: display; 36: input / output section; 37: recording medium; 39: program; 50: environment sensor; a-j: substance.

Claims

1. An odor detection system comprising: a substance sensor that has a sensing film that reacts to each substance that constitutes an odor of a gas for each substance, and detects a reaction value of the sensing film; an odor determination section that determines the odor of the gas based on the reaction value of the sensing film detected by the substance sensor; a reaction value calculation section that calculates a reaction value for each odor determined by the odor determination section based on the reaction value of the sensing film detected by the substance sensor; a proportion calculation section that calculates a proportion of the reaction value for each odor determined by the odor determination section calculated by the reaction value calculation section in a total of the reaction values for each odor; and a display section that displays the proportion of the reaction value for each odor calculated by the proportion calculation section in a manner that enables comparison between the odors determined by the odor determination section.

2. The odor detection system according to claim 1, wherein the display section displays the reaction value for each odor calculated by the reaction value calculation section in a manner that enables comparison between the odors determined by the odor determination section.

3. The odor detection system according to claim 1, wherein the display section displays the reaction value for each odor calculated by the reaction value calculation section and the proportion of the reaction value for each odor calculated by the proportion calculation section in a manner that enables comparison.

4. The odor detection system according to claim 1, further comprising a storage section that stores the reaction value of the sensing film detected by the substance sensor in correspondence with a detection time, wherein the display section displays at least one of the reaction value for each odor calculated by the reaction value calculation section and the proportion of the reaction value for each odor calculated by the proportion calculation section in a manner that enables comparison between different detection time points based on the reaction value of the sensing film stored in the storage section.

5. The odor detection system according to claim 1, further comprising a coefficient correction section that corrects the reaction value of the sensing film detected by the substance sensor with a coefficient of each sensing film that is decided in accordance with an environmental condition around the sensing film for each sensing film, wherein the odor determination section determines the odor of the gas based on the reaction value of the sensing film corrected by the coefficient correction section.

6. The odor detection system according to claim 5, wherein the reaction value calculation section calculates a reaction value for each odor determined by the odor determination section based on the reaction value of the sensing film corrected by the coefficient correction section, and the display section displays the reaction value for each odor calculated by the reaction value calculation section in a manner that enables comparison between the odors determined by the odor determination section.

7. The odor detection system according to claim 6, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The display section displays the reaction value for each of the odors calculated by the reaction value calculation section and the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison.

8. The odor detection system according to claim 6, wherein Further provided is a storage section that stores the reaction value of the sensing film detected by the substance sensor in correspondence with the time of detection, The display section displays at least one of the reaction value for each of the odors calculated by the reaction value calculation section and the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison between different points in time of detection, based on the reaction value of the sensing film stored in the storage section.

9. The odor detection system according to claim 5, wherein Further provided is an environmental sensor that detects the environmental conditions, The coefficient correction section corrects the reaction value of the sensing film detected by the substance sensor with the coefficient of each of the sensing films determined in accordance with the environmental conditions detected by the environmental sensor, for each of the sensing films.

10. The odor detection system according to claim 5, wherein The environmental conditions include at least one of humidity, temperature, and air pressure.

11. An odor detection method performed by an odor detection system for detecting the odor of a gas, the odor detection method comprising: an odor determination step of determining the odor of the gas based on the reaction value of a sensing film detected by a substance sensor having the sensing film that reacts to each substance constituting the odor of the gas for each of the substances; a reaction value calculation step of calculating the reaction value for each of the odors determined by the odor determination step based on the reaction value of the sensing film detected by the substance sensor; a proportion calculation step of calculating the proportion of the reaction value for each of the odors determined by the reaction value calculation step in the total of the reaction values for each of the odors; and a display step of displaying the proportion of the reaction value for each of the odors calculated by the proportion calculation step in a manner that enables comparison between the odors determined by the odor determination step.

12. An odor detection method performed by an odor detection system for detecting the odor of a gas, the odor detection method comprising: a coefficient correction step of correcting the reaction value of a sensing film detected by a substance sensor having the sensing film that reacts to each substance constituting the odor of the gas for each of the substances with the coefficient of each of the sensing films determined in accordance with the environmental conditions around the sensing film; an odor determination step of determining the odor of the gas based on the reaction value of the sensing film corrected by the coefficient correction step; and a display step of displaying the proportion of the reaction value for each of the odors calculated by the proportion calculation step in a manner that enables comparison between the odors determined by the odor determination step. a reaction value calculation step of calculating a reaction value for each of the odors determined by the odor determination step, based on the reaction values of the sensing films corrected by the coefficient correction step; and a display step of displaying the reaction values for each of the odors calculated by the reaction value calculation step in a manner that enables comparison between the odors determined by the odor determination step.

13. A computer-readable recording medium storing a program that causes a computer to function as: an odor determination section that determines an odor of a gas based on reaction values of sensing films detected by a substance sensor that has the sensing films for each substance that reacts to the substance constituting the odor of the gas; a reaction value calculation section that calculates a reaction value for each of the odors determined by the odor determination section, based on the reaction values of the sensing films detected by the substance sensor; a proportion calculation section that calculates a proportion of the reaction value for each of the odors determined by the odor determination section calculated by the reaction value calculation section in a total of the reaction values for each of the odors; and a display section that displays the proportion of the reaction value for each of the odors calculated by the proportion calculation section in a manner that enables comparison between the odors determined by the odor determination section.

14. A computer-readable recording medium storing a program that causes a computer to function as: a coefficient correction section that corrects reaction values of each sensing film that reacts to a substance constituting an odor of a gas, detected by a substance sensor that has the sensing film for each of the substances, with a coefficient of each of the sensing films determined according to environmental conditions around the sensing films; an odor determination section that determines the odor of the gas based on the reaction values of the sensing films corrected by the coefficient correction section; a reaction value calculation section that calculates a reaction value for each of the odors determined by the odor determination section, based on the reaction values of the sensing films corrected by the coefficient correction section; and a display section that displays the reaction values for each of the odors calculated by the reaction value calculation section in a manner that enables comparison between the odors determined by the odor determination section.

15. A computer program product including a computer program that, when executed by a processor, performs the odor detection method according to claim 11 or 12. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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