Data acquisition apparatus for analog measuring instrument

Abstract

A data acquisition apparatus 100 for an analog measuring instrument includes: a sampling cycle setting means 111 for setting a sampling cycle in accordance with a measurement value based on the state of a pointer of an external device; a sampling means 112 for acquiring a measurement value at a sampling cycle; a first output means 114A for outputting data to an external device 12 on the basis of a change amount of the measurement value acquired by the sampling means 112; a second output means 114B for outputting data to the external device 12 at each sampling cycle set by the sampling cycle setting means 111; and a determination means 113 for determining whether to output data to the external device 12 by using the first output means 114A or the second output means 114B in accordance with the measurement value acquired by the sampling means 112.

Description

Data acquisition device for analog instruments

[0001] The present invention relates to data acquisition devices for analog instruments.

[0002] Conventionally, various industrial instruments such as pressure gauges, thermometers, flow meters, and power meters have been widely used as analog instruments. Generally, in these analog instruments, the user can grasp the value (pressure, temperature, flow rate, and power) by directly visually checking the scale on the dial where the pointer points.

[0003] Furthermore, in recent years, techniques have become known in which analog quantities (values) measured or detected by analog instruments are converted into digital values ​​and output, or further, external devices are notified of the digital values ​​using communication means.

[0004] In Patent Document 1, an IC tag unit is attached to an existing analog instrument, and the IC tag unit detects the movement of the pointer of the analog instrument using, for example, a proximity sensor or a magnetic sensor. The information acquired by these sensors and / or data calculated from the information are then transmitted to the outside using a communication means such as wireless.

[0005] JP 2017-203775 A International Publication No. 2018 / 066687

[0006] However, the IC tag unit disclosed in Patent Document 1 is equipped with a battery as a power source, and if the movement of the pointer of the analog instrument is constantly monitored by a sensor and data communication with external devices is frequently performed, there is a risk that the battery will be rapidly consumed.

[0007] Patent Document 2 discloses a technology for saving power by wirelessly transmitting at appropriate intervals.

[0008] Therefore, an object of the present invention is to provide a data acquisition device for an analog meter that can appropriately extract information measured or detected by the analog meter while taking energy saving into consideration.

[0009] A data acquisition device for an analog instrument according to one aspect of the present invention is a data acquisition device for an analog instrument that is attached to and used on an analog instrument, and comprises a sampling period setting means that sets a sampling period in accordance with a measurement value based on the state of the pointer of the analog instrument, a sampling means that acquires the measurement value at the sampling period set by the sampling period setting means, a first output means that outputs data to an external device based on the amount of change in the measurement value acquired by the sampling means, a second output means that outputs data to the external device for each sampling period set by the sampling period setting means, and a determination means that determines whether to output data to the external device using the first output means or the second output means in accordance with the measurement value acquired by the sampling means.

[0010] In the above aspect, the first output means may output data to an external device when the amount of change in the measurement value acquired by the sampling means is equal to or greater than a threshold value.

[0011] In the above aspect, the threshold value may be set in accordance with a measurement value based on the state of the pointer of the analog gauge.

[0012] In the above aspect, the device may further include a third output means for outputting data to an external device when the measurement value acquired by the sampling means changes by a predetermined amount from the measurement value acquired by the sampling means when data is output to the external device by the first output means.

[0013] In the above aspect, the device may further include a fourth output means for outputting data to an external device at specific intervals longer than the sampling interval set by the sampling interval setting means, in accordance with the measurement value acquired by the sampling means.

[0014] In the above aspect, the specific period may be set in accordance with a measurement value based on the state of a pointer of the analog meter.

[0015] In the above aspect, the device may further include a fifth output means for outputting data to an external device to notify the user of information corresponding to the measurement value acquired by the sampling means when the measurement value acquired by the sampling means is a predetermined specific value.

[0016] In the above aspect, the information corresponding to the measurement value may include information indicating an abnormality in the analog meter.

[0017] In the above aspect, when the data acquisition device starts operating, the sampling period may be set in accordance with a communication method between the data acquisition device and the external device.

[0018] In the above aspect, the communication method can be selected from a first communication method and a second communication method that enables longer distance transmission than the first communication method, and when the second communication method is used, the sampling period may be set longer than when the first communication method is used.

[0019] According to the present invention, it is possible to provide a data acquisition device for an analog meter that can appropriately extract information measured or detected by the analog meter while taking energy saving into consideration.

[0020] Fig. 1 is a system overview diagram showing a pressure monitoring system 10 including an analog pressure gauge according to one embodiment of the present invention. Fig. 2 is a functional block diagram showing each function of a data acquisition device 100 for an analog pressure gauge according to one embodiment of the present invention. Fig. 3 is a diagram showing the remaining amount of oxygen gas corresponding to the position (angle) of the pointer of an analog pressure gauge 11. Fig. 4 is a diagram showing various settings and operations in the data acquisition device 100 corresponding to the remaining amount of oxygen gas.

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiment described below is merely a specific example for carrying out the present invention and is not intended to limit the scope of the present invention. Furthermore, to facilitate understanding of the description, the same components in each drawing will be designated by the same reference numerals wherever possible, and duplicate descriptions may be omitted.

[0022] <One embodiment> [Configuration of pressure monitoring system] Figure 1 is a system overview diagram showing a pressure monitoring system 10 including an analog pressure gauge according to one embodiment of the present invention. As shown in Figure 1, the pressure monitoring system 10 includes an analog pressure gauge 11, a gateway 12, a cloud system 13, and a user terminal 14. Furthermore, a data acquisition device 100 is attached to the analog pressure gauge 11.

[0023] The pressure monitoring system 10 is a system that can remotely monitor the remaining amount of medical oxygen gas, for example, in a hospital facility. Specifically, it measures the pressure in the tanks and cylinders that supply medical oxygen gas, thereby determining the amount of medical oxygen gas being used and the remaining amount.

[0024] The analog pressure gauge 11 is a commonly known analog pressure gauge that measures or detects the pressure of, for example, a tank or a cylinder depending on the position of a scale plate indicated by a pointer.

[0025] The data acquisition device 100 is attached to an existing analog pressure gauge 11, and acquires the measurement value (angle or pressure value) based on the position (angle) of the scale plate indicated by the needle of the analog pressure gauge 11, and transmits the measurement value to the gateway 12 using communication such as Bluetooth (registered trademark).

[0026] For example, the data acquisition device 100 includes a sensor, a control unit (CPU), and a communication module. The control unit causes the sensor to detect the position (angle) of the pointer of the analog pressure gauge 11 at a sampling period, and the communication module transmits the detected angle information (sin －１ θ, cos －１ θ) to the gateway 12. Alternatively, the control unit may calculate a pressure value from the detected angle information, and the communication module may transmit the calculated pressure value to the gateway 12.

[0027] The information transmitted from the communication module to the gateway 12 is not limited to angle information and pressure values, and other necessary data may be transmitted to the gateway 12. Details of the sampling period, the timing of transmitting data to the gateway 12, etc. will be described later.

[0028] Here, the sensor that detects the position (angle) of the pointer of the analog pressure gauge 11 may be, for example, an inductive proximity sensor, a capacitive proximity sensor, or an optical proximity sensor that can detect the movement of the pointer without contact. However, the sensor is not limited to these, and may be a magnetic sensor that can detect the movement of the pointer based on changes in the magnetic field by attaching a magnet to the pointer of the analog pressure gauge 11, or any other sensor that can detect the movement and position (angle) of the pointer.

[0029] The data acquisition device 100 may be powered by, for example, a battery, and the communication module may transmit battery information including remaining battery capacity information to the gateway 12 .

[0030] The gateway 12 is configured to relay between the data acquisition device 100 and the cloud system 13 , and transmits data received from the data acquisition device 100 to the cloud system 13 .

[0031] For example, the gateway 12 may be capable of communicating with the data acquisition device 100 via Bluetooth or the like, and may be capable of communicating with the cloud system 13 via LTE or the like, but the communication method is not limited to these, and further, is not limited to wireless communication, but may also be wired communication.

[0032] Note that, when the data acquisition device 100 starts operating, the sampling period may be set according to the communication method. For example, if Bluetooth or LoRa (registered trademark) is set as the communication method as the initial setting of the data acquisition device 100, it is preferable to set the sampling period longer when LoRa is used because battery consumption is greater when Bluetooth is used than when Bluetooth is used. Specifically, when LoRa is set as the communication method, the sampling period may be set in the range of 30 seconds to 1 hour (1 hour by default), and when Bluetooth is set as the communication method, the sampling period may be set in the range of 2.5 seconds to 30 seconds (5 seconds by default).

[0033] Furthermore, in order to relay between the data acquisition device 100 and the cloud system 13, other relay devices may be used in addition to the gateway 12.

[0034] The cloud system 13 notifies a user terminal 14, such as a personal computer or smartphone, of the data acquired by the data acquisition device 100 and information to be notified to the user based on the data. The user terminal 14 can, for example, obtain via the Internet information such as the pressure values ​​of the tank and cylinder measured or detected by the analog pressure gauge 11, the amount of medical oxygen gas used and remaining, the time to replenish oxygen gas, and the remaining battery charge of the data acquisition device 100.

[0035] The configuration for allowing the user to understand this information is not limited to a cloud system 13 using the Internet, but may be any configuration that allows the data output from the data acquisition device 100 to be received by the user terminal 14, for example, using a local network or other server system.

[0036] [Details of the Data Acquisition Device] Fig. 2 is a functional block diagram showing each function of a data acquisition device 100 for an analog pressure gauge according to one embodiment of the present invention. As shown in Fig. 2, the data acquisition device 100 includes a control unit 110, a sensor 120, and a battery 130.

[0037] The control unit 110 is, for example, a CPU, and includes a sampling period setting means 111, a sampling means 112, a determination means 113, and an output means 114, and the output means 114 further includes first to fifth output means 114A to 114E.

[0038] As described above, the sensor 120 is a sensor that detects the position (angle) of the pointer of the analog pressure gauge 11 , and the battery 130 is a power source that drives the data acquisition device 100 .

[0039] The sampling period setting means 111 sets the sampling period according to a measurement value based on the state of the pointer of the analog pressure gauge 11. For example, the sampling period setting means 111 sets the timing (sampling period) at which the sensor 120 measures (detects) the position (angle) of the pointer of the analog pressure gauge 11 according to the remaining amount of oxygen gas in the tank and the cylinder. Specifically, when the remaining amount of oxygen gas is large, the sampling period may be set long, and as the remaining amount of oxygen gas decreases, the sampling period may be set short.

[0040] The sampling means 112 measures (detects) the position (angle) of the pointer of the analog pressure gauge 11 using the sensor 120 at the sampling period set by the sampling period setting means 111, and acquires the measurement value. The sampling means 112 may acquire the position (angle) of the pointer of the analog pressure gauge 11 as the measurement value, or may acquire a pressure value calculated (converted) based on the position (angle) as the measurement value.

[0041] As described above, if the sampling period setting means 111 sets a long sampling period when the remaining amount of oxygen gas is large, the sampling frequency performed by the sampling means 112 decreases, thereby reducing consumption of the battery 130. On the other hand, if the sampling period is set to a shorter period as the remaining amount of oxygen gas decreases, the user can be appropriately notified of the situation depending on the level of urgency, etc.

[0042] The determination means 113 determines whether to output data using the first output means 114A or the second output means 114B (described later) of the output means 114, in accordance with the measurement value acquired by the sampling means 112. For example, based on the measurement value acquired by the sampling means 112, if the remaining amount of oxygen gas is large, the determination means 113 determines to use the first output means 114A to transmit data to the gateway 12 if the amount of change in the measurement value is large (above a threshold), and if the remaining amount of oxygen gas is small, the determination means 113 determines to use the second output means 114B to transmit data to the gateway 12 at each sampling period.

[0043] That is, when the remaining amount of oxygen gas is large, data is transmitted when the change in the measurement value is large (above the threshold), and the communication frequency is reduced, so the user can be appropriately notified of the situation while reducing consumption of the battery 130. On the other hand, when the remaining amount of oxygen gas is low, data is transmitted at each sampling period, so the user can be appropriately notified of the situation in detail.

[0044] The output means 114 includes first output means 114A to fifth output means 114E, and each of them transmits the measurement value (angle) acquired by the sampling means 112, the pressure value calculated (converted) based on it, other necessary data, battery information, etc. to the gateway 12 using a communication module.

[0045] The first output means 114A outputs data to the gateway 12 based on the amount of change in the measurement value acquired by the sampling means 112. For example, when the remaining amount of oxygen gas is large, data is transmitted to the gateway 12 using the first output means 114A, but the first output means 114A outputs data to the gateway 12 when the amount of change in the measurement value acquired by the sampling means 112 is equal to or greater than a threshold value.

[0046] Here, the threshold value may be set according to the measurement value based on the state of the pointer of the analog pressure gauge 11. For example, when the remaining amount of oxygen gas is large, the threshold value may be set large, and when the remaining amount of oxygen gas is small (as the remaining amount decreases), the threshold value may be set small. In other words, when the remaining amount of oxygen gas is large, a sudden change in the measurement value may be notified, and as the remaining amount of oxygen gas decreases, a small change in the measurement value may be notified.

[0047] The second output means 114B outputs data to the gateway 12 for each sampling period set by the sampling period setting means 111. For example, when the remaining amount of oxygen gas is low, data is transmitted to the gateway 12 using the second output means 114B, and the second output means 114B transmits data to the gateway 12 for each sampling period in which the sampling means 112 acquires a measurement value.

[0048] In addition, since the sampling period is set shorter as the remaining amount of oxygen gas decreases, the second output means 114B will frequently send data to the gateway 12, and will be able to appropriately notify the user of detailed conditions taking into account the urgency of the situation, etc.

[0049] The third output means 114C outputs data to the gateway 12 when the measurement value acquired by the sampling means 112 changes by a predetermined amount from the measurement value acquired by the sampling means 112 when data is output to the gateway 12 by the first output means 114A.

[0050] For example, when the remaining amount of oxygen gas is large, data is transmitted to the gateway 12 using the first output means 114A when the change in the measurement value is large (above a threshold), but data is not transmitted to the gateway 12 when the change in the measurement value is not above the threshold. Therefore, the third output means 114C transmits data to the gateway 12 when the measurement value has changed by a predetermined amount since the last time data was transmitted to the gateway 12. This allows the user to understand the progress, for example, whether the remaining amount of oxygen gas is gradually decreasing.

[0051] The fourth output means 114D outputs data to the gateway 12 at specific intervals longer than the sampling period set by the sampling period setting means 111, in accordance with the measurement value acquired by the sampling means 112.

[0052] According to the first output means 114A described above, when the remaining amount of oxygen gas is large, the gateway 12 will not receive data unless the change in the measurement value becomes large (above the threshold value), but if, for example, the analog pressure gauge 11 or the sensor 120 is broken or a communication failure occurs, the gateway 12 will not receive data. In order to distinguish between such an abnormal state and a state in which the change in the measurement value is not above the threshold value, the fourth output means 114D may transmit data indicating so-called life / death confirmation to the gateway 12 at specific intervals.

[0053] If the data acquisition device 100 and the communication environment are normal, the gateway 12 will receive data at least at specific intervals, but if data is not received at the specific intervals, the gateway 12 may notify the cloud system 13 of an abnormality, thereby allowing the user to know that an abnormality has occurred.

[0054] Here, the specific period may be set according to a measurement value based on the state of the pointer of the analog pressure gauge 11. For example, as the remaining amount of oxygen gas decreases, the specific period may be set shorter, taking into account the urgency of the situation. This makes it possible to immediately grasp the occurrence of an abnormality when the remaining amount of oxygen gas is low.

[0055] When the measurement value acquired by the sampling means 112 is a predetermined specific value (when it reaches the specific value), the fifth output means 114E outputs data to the gateway 12 to notify the user of information corresponding to the measurement value. For example, appropriate notifications (information) may be sent to the gateway 12 at the following times: when the remaining amount of oxygen gas is low and the user is urged to replenish the gas; when the remaining amount of oxygen gas is even lower and the user is urged to take caution; and when the remaining amount of oxygen gas is extremely low and the user is urged to take precautions. Furthermore, the specific values ​​may be set to detect information indicating an abnormality in the analog pressure gauge 11, including boundary values ​​within and outside the range normally indicated by the analog pressure gauge 11, and values ​​that indicate that a malfunction has occurred in the analog pressure gauge 11.

[0056] [Specific Example] Next, a specific example will be described with reference to Figures 3 and 4. Figure 3 is a diagram showing the remaining amount of oxygen gas corresponding to the position (angle) of the pointer of the analog pressure gauge 11, and Figure 4 is a diagram showing various settings and operations in the data acquisition device 100 corresponding to the remaining amount of oxygen gas.

[0057] As shown in FIGS. 3 and 4, (a) when the position (angle) of the pointer of the analog pressure gauge 11 is 151.2° (pressure is 14 MPa), the oxygen gas tank is full.

[0058] First, (a) angle 151.2° (pressure 14 MPa) to (b) angle 75.6° (pressure 7 MPa) are set as "A: normal region," (b) angle 75.6° (pressure 7 MPa) to (c) angle 32.4° (pressure 3 MPa) are set as "B: region requiring oxygen supplementation," (c) angle 32.4° (pressure 3 MPa) to (d) angle 21.6° (pressure 2 MPa) are set as "C: oxygen remaining caution region," and (d) angle 21.6° (pressure 2 MPa) or less are set as "D: oxygen remaining danger region."

[0059] The sampling period setting means 111 sets the sampling frequencies for "A: normal region", "B: region requiring oxygen supplementation", "C: region requiring caution regarding remaining oxygen", and "D: region requiring dangerous remaining oxygen" to 1 ms, 30 s, 10 s, and 5 s, respectively.

[0060] In "A: normal region," the sampling means 112 acquires a measurement value every 1 m, and if the amount of change is equal to or greater than a threshold (angle 1° or pressure 0.1 MPa), the first output means 114A transmits data to the gateway 12. In addition, the fourth output means 114D transmits data to the gateway 12 every hour to check the status of the analog pressure gauge 11 including the data acquisition device 100 and the communication status.

[0061] Next, when the oxygen gas decreases and reaches (b) an angle of 75.6° (pressure of 7 MPa) as the measurement value acquired by the sampling means 112, the fifth output means 114E outputs command data prompting the user to replenish the oxygen gas to the gateway 12. Thereafter, a notification prompting the user to replenish the oxygen gas is sent to the user terminal 14 via the gateway 12 and the cloud system 13.

[0062] The sampling period is 30 seconds, and in "B: Oxygen supplement required region," the sampling means 112 acquires a measurement value every 30 seconds, and if the amount of change is equal to or greater than a threshold value (angle 0.3° or pressure 0.03 MPa), the first output means 114A transmits the data to the gateway 12. In addition, the fourth output means 114D transmits data to the gateway 12 every 30 meters to check the status of the analog pressure gauge 11 including the data acquisition device 100 and the communication status.

[0063] Next, when the oxygen gas further decreases and reaches an angle of 32.4° (pressure of 3 MPa) (c) as the measurement value acquired by the sampling means 112, the fifth output means 114E outputs command data to the gateway 12 to warn about the remaining amount of oxygen gas. Thereafter, a notification warning about the remaining amount of oxygen gas is sent to the user terminal 14 via the gateway 12 and the cloud system 13.

[0064] The sampling period is 10 seconds, and in "C: Oxygen Remaining Amount Caution Area," the sampling means 112 acquires a measurement value every 10 seconds, and the second output means 114B outputs data to the gateway 12 every sampling period (every 10 seconds).

[0065] Next, when the oxygen gas further decreases and reaches an angle of 21.6° (pressure of 2 MPa) (d) as the measurement value acquired by the sampling means 112, the fifth output means 114E outputs command data to the gateway 12, warning of the danger regarding the remaining amount of oxygen gas. Thereafter, a notification warning of the danger regarding the remaining amount of oxygen gas is sent to the user terminal 14 via the gateway 12 and the cloud system 13.

[0066] The sampling period is 5 seconds, and in "D: Oxygen Remaining Danger Zone", the sampling means 112 acquires a measurement value every 5 seconds, and the second output means 114B outputs data to the gateway 12 every sampling period (every 5 seconds).

[0067] When oxygen gas is replenished and the state returns from "B: Oxygen replenishment required region," "C: Oxygen remaining caution region," or "D: Oxygen remaining danger region" to "A: Normal region," the fifth output means 114E may output command data indicating that oxygen gas has been replenished to the gateway 12. Thereafter, a notification indicating that oxygen gas has been replenished is sent to the user terminal 14 via the gateway 12 and the cloud system 13.

[0068] As described above, according to the data acquisition device 100 for an analog pressure gauge according to one embodiment of the present invention, when the remaining amount of oxygen gas is large (for example, "A: normal region" and "B: oxygen supplement required region" in FIG. 4), the frequency of sampling and data output is reduced, and necessary information is output to the gateway 12 at an appropriate timing. Also, when the remaining amount of oxygen gas is low (for example, "C: oxygen remaining caution region" and "D: oxygen remaining danger region" in FIG. 4), the frequency of sampling and data output is increased, and necessary information is output in detail to the gateway 12. This realizes a data acquisition device 100 that can appropriately extract information measured or detected by the analog pressure gauge 11 while taking energy conservation into consideration.

[0069] As a result, the pressure monitoring system 10 achieves energy savings while reducing the consumption of the battery 130 of the data acquisition device 100 attached to the analog pressure gauge 11, and can notify the user of necessary information at the appropriate time and frequency.

[0070] In this embodiment, "A: normal region," "B: region requiring oxygen supplementation," "C: region requiring oxygen supplementation caution," and "D: region requiring oxygen hazardous level" are set, and the first output means 114A is used for "A: normal region" and "B: region requiring oxygen supplementation," and the second output means 114B is used for "C: region requiring oxygen hazardous level" and "D: region requiring oxygen hazardous level," but this is not limited to this. For example, the first output means 114A may be used for three regions and the second output means 114B may be used for one region, or other configurations may be used.

[0071] Furthermore, the number of regions to be set is not limited to four, but may be, for example, two or three regions, or five or more regions.

[0072] In this embodiment, the pressure monitoring system 10 is described as being used in a hospital facility by attaching the data acquisition device 100 to the analog pressure gauge 11, but the present invention is not limited to this. For example, the data acquisition device 100 may be attached to analog gauges such as a thermometer and a flow meter, and the system may be applied to a system that monitors temperature, flow rate, etc.

[0073] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The elements of the embodiments, as well as their arrangement, materials, conditions, shapes, sizes, etc., are not limited to those illustrated and can be modified as appropriate. Furthermore, configurations shown in different embodiments can be partially substituted or combined with each other.

[0074] DESCRIPTION OF SYMBOLS 10...Pressure monitoring system, 11...Analog pressure gauge, 12...Gateway, 13...Cloud system, 14...User terminal, 100...Data acquisition device, 110...Control unit, 111...Sampling period setting means, 112...Sampling means, 113...Determination means, 114...Output means, 114A...First output means, 114B...Second output means, 114C...Third output means, 114D...Fourth output means, 114E...Fifth output means, 120...Sensor, 130...Battery

Claims

1. A data acquisition device for an analog instrument that is attached to and used with an analog instrument, the data acquisition device comprising: sampling period setting means for setting a sampling period according to a measurement value based on the state of the pointer of the analog instrument; sampling means for acquiring the measurement value at the sampling period set by the sampling period setting means; first output means for outputting data to an external device based on the amount of change in the measurement value acquired by the sampling means; second output means for outputting data to the external device for each sampling period set by the sampling period setting means; and determination means for determining whether to output data to the external device using the first output means or the second output means according to the measurement value acquired by the sampling means. A data acquisition device for an analog instrument.

2. The data acquisition device for an analog instrument according to claim 1, wherein the first output means outputs data to the external device when the amount of change in the measurement value acquired by the sampling means is equal to or greater than a threshold value.

3. The data acquisition device for an analog instrument according to claim 2, wherein the threshold value is set according to the measurement value based on the state of the pointer of the analog instrument.

4. The data acquisition device for an analog instrument according to claim 1, further comprising third output means for outputting data to the external device when the measurement value acquired by the sampling means changes by a predetermined amount from the measurement value acquired by the sampling means when data is output to the external device by the first output means.

5. The data acquisition device for an analog instrument according to claim 1, further comprising fourth output means for outputting data to the external device for each specific period that is longer than the sampling period set by the sampling period setting means according to the measurement value acquired by the sampling means.

6. The data acquisition device for an analog instrument according to claim 5, wherein the specific period is set according to the measurement value based on the state of the pointer of the analog instrument.

7. The data acquisition device for an analog instrument according to claim 1, further comprising fifth output means for outputting, to the external device, data for notifying a user of information corresponding to the measurement value when the measurement value acquired by the sampling means is a preset specific value.

8. The data acquisition device for an analog instrument according to claim 7, wherein the information corresponding to the measurement value includes information indicating an abnormality of the analog instrument.

9. When the operation of the data acquisition device starts, a sampling period is set according to the communication method between the data acquisition device and the external device. The data acquisition device for an analog instrument according to claim 1.

10. The communication method can select a first communication method and a second communication method capable of longer-distance transmission than the first communication method. When the second communication method is used, the sampling period is set longer than when the first communication method is used. The data acquisition device for an analog instrument according to claim 9.

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