Measurement device, measurement system and control method

Abstract

To easily acquire measurement data.SOLUTION: A measuring device 10 according to the present disclosure comprises: a measured unit 101 for receiving physical quantity of a measurement object; a power-supply circuit 11 for receiving power fed from a communication apparatus 20 via wireless power-feeding, in response to an approach of the communication apparatus 20; a wireless communication unit 12 for performing short-range wireless communication with the communication apparatus 20, in response to the approach of the communication apparatus 20; and a signal production unit 17 for producing a signal indicating measurement data of the physical quantity received by the measured unit 101, that is driven by the power fed by the power-supply circuit 11. The wireless communication unit 12 transmits the signal produced by the signal production unit 17 to the communication apparatus 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a measurement device. [Background technology]

[0002] Among measuring devices for measuring physical quantities, there are those equipped with a mechanical indicator that indicates a measured value by mechanically operating in accordance with the measured physical quantity. Patent Document 1 also discloses a measuring device that includes a data communication device that wirelessly transmits measurement data such as pressure in order to obtain measurement data such as pressure in a location that is difficult to access, and a power source (battery) that drives the data communication device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2006-510035 Summary of the Invention [Problem to be solved by the invention]

[0004] Measuring devices equipped with mechanical indicators require time-consuming manual operations such as checking measured values and inputting the measured data into a management device that manages the measured data. Furthermore, the measuring device disclosed in Patent Document 1 requires the time and cost of replacing batteries in order to continuously acquire measured data.

[0005] In view of the above-mentioned problems, an object of the present disclosure is to provide a measurement device, a measurement system, and a method for controlling a measurement device that can easily acquire measurement data. [Means for solving the problem]

[0006] In some embodiments, the measurement device includes a measured unit that receives a physical quantity to be measured, a power supply circuit that receives power from an external device via wireless power supply in response to the external device approaching, a wireless communication unit that performs short-range wireless communication with the external device in response to the external device approaching, and a signal generation unit that is driven by power supplied to the power supply circuit and generates a signal indicating measurement data of the physical quantity received by the measured unit, and the wireless communication unit transmits the signal generated by the signal generation unit to the external device. With a measuring device having such a configuration, measurement data from the measuring device can be transmitted to the external device by the simple operation of bringing the external device close to the measuring device, making it easy to obtain the measurement data.

[0007] In one embodiment, the measuring device further includes a mechanical indicator that, through mechanical operation, indicates a displacement corresponding to a physical quantity received by the measured part as a value indicating the physical quantity, and the signal generating part includes a gauge sensor that outputs a voltage corresponding to the displacement, a voltage measuring circuit that measures the voltage output from the gauge sensor, and an arithmetic circuit that generates the signal based on the voltage measured by the voltage measuring circuit. With this configuration, the physical quantity received by the measured part can be measured and indicated by the mechanical indicator without power consumption, and the measurement data can be transmitted to an external device.

[0008] In one embodiment, the wireless communication unit performs short-distance wireless communication with the external device using a communication method conforming to the NFC (Near Field Communication) standard. With this configuration, measurement data can be acquired using a general-purpose device that is capable of communication using a communication method that complies with the NFC communication standard.

[0009] In one embodiment, the signal generation unit includes a nonvolatile storage unit, and stores information transmitted from the external device via the wireless communication unit in the nonvolatile storage unit. With this configuration, various types of information can be stored in the nonvolatile storage unit, thereby improving convenience.

[0010] In some embodiments, a measurement system includes a measurement device, an external device capable of supplying power to and communicating with the measurement device in response to proximity to the measurement device, and a management device that manages measurement data of the measurement device. The measurement device includes a measured unit that receives a physical quantity, a power supply circuit that receives power from the external device via wireless power supply in response to proximity of the external device, a wireless communication unit that performs short-range wireless communication with the external device in response to proximity of the external device, and a signal generation unit that is driven by power supplied to the power supply circuit and generates a signal indicating measurement data of the physical quantity received by the measured unit. The wireless communication unit transmits the signal generated by the signal generation unit to the external device, and the external device transmits the signal transmitted from the measurement device to the management device via a network. With a measurement system having such a configuration, measurement data from the measurement device can be sent to the external device with the simple operation of bringing the external device close to the measurement device, making it possible to easily acquire measurement data and send it to the management device.

[0011] A control method for a measuring device in some embodiments is a control method for a measuring device having a measured unit that receives a physical quantity, and includes the steps of receiving a supply of power from an external device via wireless power supply in response to the approach of the external device, generating a signal indicating measurement data of the physical quantity received by the measured unit upon receiving the supply of power, and transmitting the generated signal to the external device via wireless communication. According to a control method having such a configuration, measurement data of the measurement device is transmitted to the external device by the simple operation of bringing the external device close to the measurement device, so that measurement data can be easily acquired. [Effects of the Invention]

[0012] According to the measurement device, measurement system, and measurement device control method of the present disclosure, measurement data can be easily acquired. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a measurement system including a measurement device according to an embodiment of the present disclosure. [Figure 2] 2 is a flowchart showing an example of the operation of the measurement device shown in FIG. [Figure 3] 2 is a sequence diagram showing an example of the operation of the measurement device and the communication device shown in FIG. 1. [Figure 4] 1. FIG. 4 is a diagram showing another example of the configuration of a measurement system including the measurement device shown in FIG. [Figure 5] FIG. 2 is a diagram showing a configuration example in which the measurement device shown in FIG. 1 is a pressure gauge. [Figure 6] 2 is a diagram for explaining the principle of communication between the measurement device and communication device shown in FIG. 1. FIG. [Figure 7] 1. FIG. 4 is a diagram showing another example of the configuration of the measurement device shown in FIG. [Figure 8] FIG. 10 is a diagram illustrating an example of the configuration of a measurement device according to a comparative example. [Figure 9] 9 is a flowchart showing an example of the operation of the measurement device shown in FIG. [Figure 10] 9 is a diagram for explaining how measurement data is acquired in the measurement device shown in FIG. 8. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same reference numerals indicate the same or equivalent components.

[0015] First, for comparison, an example of the configuration of a measurement device 100 according to a comparative example will be described with reference to FIG.

[0016] The measuring device 100 shown in FIG. 8 includes a measured part 101, a physical quantity-to-displacement conversion part 102, a displacement-to-indication conversion part 103, and a mechanical indicator 104.

[0017] The measured part 101 receives a physical quantity to be measured, such as vibration, temperature, or pressure. For example, if the physical quantity to be measured is pressure, the measured part 101 is subjected to the pressure to be measured.

[0018] The physical quantity-displacement converter 102 displaces in accordance with the physical quantity received by the part to be measured 101 .

[0019] The displacement-indication conversion unit 103 converts the displacement of the physical quantity-displacement conversion unit 102 into an indication value of the mechanical indicator 104, and causes the mechanical indicator 104 to indicate it.

[0020] The mechanical indicator 104 operates mechanically in accordance with the indication value from the displacement-indication conversion unit 103, and indicates the physical quantity received by the measured unit 101. In other words, the physical quantity received by the measured unit 101 is output by the mechanical indicator 104 as a measurement value (measurement data) of the measuring device 100.

[0021] FIG. 9 is a flowchart showing the operation of the measurement device 100 shown in FIG.

[0022] When the unit under test 101 receives a physical quantity, the measuring device 100 starts operating.

[0023] The physical quantity-displacement converter 102 displaces in accordance with the physical quantity received by the unit under measurement 101 (step S101). That is, the physical quantity-displacement converter 102 converts the physical quantity received by the unit under measurement 101 into a displacement.

[0024] The displacement-indication conversion unit 103 converts the displacement of the physical quantity-displacement conversion unit 102 into an indication value of the mechanical indicator 104 (step S102). The mechanical indicator 104 indicates the indication value through mechanical operation, thereby displaying the physical quantity received by the measured unit 101 as measurement data (step S103). In this way, the measuring device 100 shown in Fig. 8 can measure a physical quantity and display the measured physical quantity without power consumption.

[0025] FIG. 10 is a diagram for explaining how measurement data is acquired by the measurement device 100. As shown in FIG.

[0026] 10, when acquiring measurement data from measuring device 100, worker 200 visually confirms the measured value of the physical quantity displayed on mechanical indicator 104 of measuring device 100 (task A). Next, worker 200 records the confirmed measurement value on recording medium 300 (e.g., paper) that can be used at the site where measuring device 100 is installed (task B). Then, worker 200 inputs the measurement data recorded on recording medium 300 into management device 400 that manages the measurement data (task C).

[0027] As described above, in order to acquire measurement data, measurement device 100 requires multiple operations by operator 200, such as operations AC described above, which is time-consuming. Furthermore, since manual intervention is required, there is a possibility of human error occurring.

[0028] Next, a configuration example of a measurement device 10 according to an embodiment of the present disclosure will be described with reference to Fig. 1. Fig. 1 is a diagram showing a configuration example of a measurement system 1 including the measurement device 10 according to this embodiment. In Fig. 1, the same components as those in Fig. 8 are given the same reference numerals, and their description will be omitted. The measurement device 10 according to this embodiment communicates with a communication device 20, which is an external device.

[0029] The measurement system 1 shown in FIG. 1 includes a measurement device 10 and a communication device 20.

[0030] The measuring device 10 is installed in, for example, a plant, measures various physical quantities such as vibration, temperature, or pressure, and outputs the measurement data. Plants in which the measuring device 10 is installed include, for example, industrial plants such as chemical plants, plants that manage and control wellheads or their surrounding areas such as gas and oil fields, plants that manage and control power generation such as hydroelectric, thermal, and nuclear power, plants that manage and control environmental power generation such as solar or wind power, and plants that manage and control water supply and sewage systems, dams, etc.

[0031] The communication device 20 is a wireless communication device that is capable of wireless power supply and short-range (e.g., several centimeters to several meters) wireless communication with other devices, for example, by an electromagnetic induction method using electromagnetic induction or an electromagnetic field resonance method utilizing the resonance phenomenon of an electromagnetic field. Specific examples of the communication device 20 include a smartphone and a tablet terminal.

[0032] Next, the configuration of the measurement device 10 according to this embodiment will be described.

[0033] 1 includes a measured unit 101, a physical quantity-to-displacement conversion unit 102, a displacement-to-indication conversion unit 103, a mechanical indicator 104, a power supply circuit 11, a wireless communication unit 12, a bridge circuit 13, a voltage measurement circuit 15, and an arithmetic circuit 16. That is, compared to the measuring device 100 shown in FIG. 8, the measuring device 10 according to this embodiment further includes a power supply circuit 11, a wireless communication unit 12, a bridge circuit 13, a voltage measurement circuit 15, and an arithmetic circuit 16. Note that the voltage measurement circuit 15 and the arithmetic circuit 16 may be configured using an analog circuit, a digital circuit, a processor, or the like.

[0034] When communication device 20 approaches, power supply circuit 11 receives power from communication device 20 via wireless power supply. Power supply circuit 11 supplies the power supplied from communication device 20 to wireless communication unit 12, bridge circuit 13, voltage measurement circuit 15, and arithmetic circuit 16. Bridge circuit 13, voltage measurement circuit 15, and arithmetic circuit 16 are not operating when not receiving power from power supply circuit 11, but are driven in response to the power supply from power supply circuit 11 and perform the operations described below.

[0035] The wireless communication unit 12 performs short-range wireless communication with the communication device 20 in response to the communication device 20 approaching.

[0036] The bridge circuit 13 is, for example, a circuit (Wheatstone bridge circuit) configured by connecting in parallel a first series body in which a gauge sensor 14 and a resistor are connected in series, and a second series body in which two resistors are connected in series. The gauge sensor 14 deforms in accordance with the displacement of the physical quantity-to-displacement converter 102, and outputs a voltage corresponding to the deformation. The bridge circuit 13 outputs the voltage output from the gauge sensor 14 as an output voltage. As described above, the physical quantity-to-displacement converter 102 displaces in accordance with the physical quantity received by the measured unit 101. The gauge sensor 14 deforms in accordance with the displacement of the physical quantity-to-displacement converter 102, and outputs a voltage corresponding to the deformation. Therefore, the output voltage of the bridge circuit 13 corresponds to the physical quantity received by the measured unit 101.

[0037] The voltage measurement circuit 15 measures the output voltage of the bridge circuit 13, that is, the voltage output from the gauge sensor .

[0038] The arithmetic circuit 16 generates a signal indicating measurement data of the physical quantity received by the unit under measurement 101 based on the voltage measured by the voltage measurement circuit 15, and transmits the generated signal to the communication device 20 via the wireless communication unit 12. For example, the arithmetic circuit 16 generates a signal indicating the measurement data of the unit under measurement 101 based on a predetermined relationship between the physical quantity received by the unit under measurement 101 and the output voltage of the bridge circuit 13 corresponding to that physical quantity.

[0039] The bridge circuit 13, the voltage measurement circuit 15, and the arithmetic circuit 16 constitute the signal generation unit 17. As described above, the bridge circuit 13, the voltage measurement circuit 15, and the arithmetic circuit 16 are driven in response to power supplied from the power supply circuit 11. Therefore, the signal generation unit 17 is driven by the power supplied from the power supply circuit 11, and generates a signal indicating measurement data of the physical quantity received by the measured unit 101. Then, the wireless communication unit 12 transmits the signal generated by the signal generation unit 17 to the communication device 20.

[0040] In the measuring device 10 according to this embodiment, by bringing the communication device 20 close to the measuring device 10, power is supplied from the communication device 20 to the measuring device 10. Measurement data is generated using the supplied power and transmitted from the measuring device 10 to the communication device 20. Therefore, for example, an operator can acquire measurement data from the measuring device 10 simply by bringing the communication device 20 close to the measuring device 10. Furthermore, in the measuring device 10 according to this embodiment, power is supplied from the communication device 20 to the measuring device 10, so there is no need to provide a battery or the like in the measuring device 10 to supply power for transmitting the measurement data. Therefore, measurement data can be acquired without the hassle of battery replacement. Therefore, the measuring device 10 according to this embodiment can easily acquire measurement data. Furthermore, because the mechanical indicator 104 operates mechanically, it does not require power supplied from the communication device 20, i.e., it can indicate the physical quantity received by the measured unit 101 without power consumption.

[0041] FIG. 2 is a diagram for explaining a control method for the measurement device 10 according to this embodiment, and is a flowchart showing an example of the operation of the measurement device 10.

[0042] When communication device 20 is brought close to measurement device 10, power supply circuit 11 receives a supply of power from communication device 20 (step S11). Power supply circuit 11 supplies the power supplied from communication device 20 to wireless communication unit 12, bridge circuit 13 constituting signal generation unit 17, voltage measurement circuit 15, and arithmetic circuit 16 (step S12). The supply of power from power supply circuit 11 drives wireless communication unit 12, bridge circuit 13, voltage measurement circuit 15, and arithmetic circuit 16. In other words, the supply of power from power supply circuit 11 drives signal generation unit 17.

[0043] When the physical quantity-to-displacement converter 102 is displaced in accordance with the physical quantity received by the measured unit 101 while the signal generator 17 is driven, the gauge sensor 14 deforms in accordance with the displacement of the physical quantity-to-displacement converter 102 and outputs a voltage in accordance with the deformation. The voltage measuring circuit 15 measures the voltage output from the gauge sensor 14 (step S13).

[0044] The arithmetic circuit 16 converts the voltage measured by the voltage measurement circuit 15 into measurement data of the physical quantity (step S14). The measurement data of the physical quantity obtained by the conversion corresponds to the physical quantity received by the unit under test 101. The arithmetic circuit 16 generates a signal indicating the obtained physical quantity, i.e., the measurement data of the physical quantity received by the unit under test 101. The wireless communication unit 12 transmits the signal generated by the arithmetic circuit 16 to the communication device 20 by wireless communication (step S15).

[0045] FIG. 3 is a sequence diagram showing an example of the operation of the measurement device 10 and the communication device 20 according to this embodiment.

[0046] In the measuring device 10, when the measured unit 101 receives a physical quantity, the physical quantity-displacement converter 102 displaces in accordance with the physical quantity received by the measured unit 101. That is, the physical quantity-displacement converter 102 converts the physical quantity received by the measured unit 101 into a displacement (step S21). The gauge sensor 14 deforms in accordance with the displacement of the physical quantity-displacement converter 102 (step S22).

[0047] Here, it is assumed that the communication device 20 is brought close to the measurement device 10, that is, the communication device 20 and the measurement device 10 are close to each other, and this state continues to be maintained (step S23).

[0048] When communication device 20 and measurement device 10 come close to each other, power is supplied from communication device 20 to power supply circuit 11 of measurement device 10 (step S24). Power supply circuit 11 supplies the power supplied from communication device 20 to wireless communication unit 12, bridge circuit 13, voltage measurement circuit 15, and arithmetic circuit 16 (step S25). In response to the power supply from communication device 20, wireless communication unit 12, bridge circuit 13, voltage measurement circuit 15, and arithmetic circuit 16 are driven.

[0049] When the bridge circuit 13 is driven, the gauge sensor 14 deforms in accordance with the displacement of the physical quantity-to-displacement converter 102, and outputs a voltage in accordance with the deformation. The voltage measurement circuit 15 measures the voltage output from the gauge sensor 14. The arithmetic circuit 16 converts the voltage measured by the voltage measurement circuit 15 into measurement data of the physical quantity (step S26). Then, the arithmetic circuit 16 generates a signal indicative of the obtained physical quantity, i.e., the measurement data of the measured unit 101, and transmits the signal to the communication device 20 via the wireless communication unit 12 (step S27).

[0050] The communication device 20 receives the signal transmitted from the measurement device 10 (step S28). Then, the communication device 20 displays the measurement data indicated in the received signal on a display unit provided in the communication device 20 or a display unit connected to the communication device 20 (step S29). The communication device 20 also saves the measurement data indicated in the received signal in storage provided in the communication device 20 (step S30). When the physical quantity received by the unit under test 101 changes while the communication device 20 and the measurement device 10 are in close proximity to each other, the processes of steps S26-S30 are repeated, and measurement data corresponding to the change is successively transmitted to the communication device 20 and saved.

[0051] Assume that after the measurement data is saved in communication device 20, communication device 20 is moved away from measurement device 10. That is, the proximity between communication device 20 and measurement device 10 is released, and communication device 20 moves out of the range where short-range wireless communication with measurement device 10 is possible (step S31). When the proximity between communication device 20 and measurement device 10 is released, the power supply from communication device 20 to power supply circuit 11 of measurement device 10 is cut off (step S32). When the proximity between communication device 20 and measurement device 10 is released, communication device 20 ends communication with measurement device 10 (step S33). Furthermore, when the power supply from communication device 20 is cut off, wireless communication unit 12, bridge circuit 13, voltage measurement circuit 15, and arithmetic circuit 16 stop operating (step S34).

[0052] 3 has been described using an example in which measurement data from the measurement device 10 is stored in the communication device 20, but this is not limiting. For example, the communication device 20 may transmit the measurement data to a management device 30 that manages the measurement data. That is, the measurement system 1 may include the measurement device 10, the communication device 20, and the management device 30, as shown in FIG.

[0053] The management device 30 is, for example, a cloud server connected to a network 31, and is a higher-level device that manages the measurement data of the measurement device 10. The network 31 may be any of various networks, whether wired or wireless, such as the Internet, a LAN (Local Area Network), or a VPN (Virtual Private Network).

[0054] The communication device 20 transmits the measurement data acquired from the measurement device 10 to the management device 30 via the network 31. As described above, the communication device 20 is a communication device such as a smartphone or a tablet terminal. Many of these communication devices have a communication function for communicating via a network. This communication function enables the communication device 20 to transmit data to the management device 30 via the network 31.

[0055] The power supplied from communication device 20 to measurement device 10 is so minute that short-range wireless communication is possible, for example, over a distance of several centimeters to several tens of centimeters. Therefore, it is difficult for measurement device 10 to transmit measurement data directly to management device 30 on network 31. However, as shown in FIG. 4, measurement data from measurement device 10 can be transmitted to management device 30 via communication device 20.

[0056] The measuring device 10 is, for example, a pressure gauge that measures pressure. When the measuring device 10 is a pressure gauge, as shown in FIG. 5, a Bourdon tube 102a can be used as the physical quantity-displacement conversion unit 102. The Bourdon tube 102a is an arc-shaped tube into which a fluid flows. The Bourdon tube 102a is displaced in response to the pressure applied to an inlet (pressure inlet 101a) that serves as the measured unit 101 and through which the fluid flows.

[0057] Furthermore, when the measuring device 10 is a thermometer, a bimetal (not shown) made by bonding two metal plates with different thermal expansion coefficients can be used as the physical quantity-displacement conversion unit 102. In this case, the bimetal displaces according to the temperature of the measured part 101.

[0058] By providing the gauge sensor 14 on the Bourdon tube 102a or the bimetal, the gauge sensor 14 deforms in response to the displacement of these, and a voltage corresponding to the physical quantity received by the measured part 101 is output from the gauge sensor 14.

[0059] The near-field wireless communication between the measuring device 10 and the communication device 20 can be performed using a communication method conforming to the NFC (Near Field Communication) standard, including NFC-A, NFC-B, and NFC-F, based on the international standard ISO / IEC 18092. In this case, the power supply circuit 11 and the wireless communication unit 12 can be configured with a coiled antenna 11a, as shown in FIG. 6 . The communication device 20 can supply power to the measuring device 10 via electromagnetic induction coupling between the antenna 11a of the measuring device 10 and the antenna of the communication device 20. This power can drive the wireless communication unit 12 and the signal generation unit 17 (bridge circuit 13, voltage measurement circuit 15, and arithmetic circuit 16) to generate signals representing measurement data. Furthermore, the measuring device 10 can transmit the generated signals to the communication device 20 via electromagnetic induction coupling between the antenna 11a of the measuring device 10 and the antenna of the communication device 20.

[0060] Currently, many communication devices such as smartphones and tablet terminals have a function of communicating using a communication method in accordance with the NFC standard (NFC communication function), and therefore, a general-purpose device with an NFC communication function can be used as communication device 20, rather than a dedicated device.

[0061] As shown in FIG. 7 , the signal generating unit 17 of the measuring device 10 may further include a nonvolatile memory unit 18. The arithmetic circuit 16 is driven by power supplied from the communication device 20. When information is transmitted from the communication device 20 via the wireless communication unit 12, the arithmetic circuit 16 can store the information in the nonvolatile memory unit 18. The nonvolatile memory unit 18 can retain the stored information even if the power supply from the communication device 20 is interrupted. The information stored in the nonvolatile memory unit 18 may include, for example, a tag name for identifying the measuring device 10, the date and time of the previous measurement data acquisition, the installation location of the measuring device 10, and the value of the previously acquired measurement data. By transmitting this information from the communication device 20 to the measuring device 10 and storing it in the nonvolatile memory unit 18, for example, when acquiring new measurement data, the information stored in the nonvolatile memory unit 18 can also be acquired, making it easy to determine the elapsed time since the previous measurement data acquisition date and time. This improves the convenience of collecting measurement data.

[0062] As described above, in this embodiment, the measurement device 10 includes a measured unit 101 that receives a physical quantity, a power supply circuit 11 that receives power from an external communication device 20 via wireless power feeding in response to the approach of the communication device 20, a wireless communication unit 12 that performs short-range wireless communication with the communication device 20 in response to the approach of the communication device 20, and a signal generation unit 17 that is driven by the power supplied to the power supply circuit 11 and generates a signal indicating measurement data of the physical quantity received by the measured unit 101. The wireless communication unit 12 then transmits the signal generated by the signal generation unit 17 to the communication device 20.

[0063] By bringing the communication device 20 closer to the measurement device 10, power is supplied from the communication device 20 to the measurement device 10, and measurement data is generated using the supplied power, and the measurement data is transmitted from the measurement device 10 to the communication device 20. Therefore, for example, an operator can acquire measurement data from the measurement device 10 with the simple operation of bringing the communication device 20 closer to the measurement device 10. Furthermore, in the measurement device 10 according to this embodiment, power is supplied to the measurement device 10 from the communication device 20, so there is no need to provide the measurement device 10 with a battery or the like that supplies power for transmitting the measurement data. Therefore, measurement data can be acquired without the hassle of replacing batteries, etc. The measurement device 10 according to this embodiment therefore allows measurement data to be acquired easily.

[0064] Although the above-described embodiments have been described as typical examples, it will be apparent to those skilled in the art that many modifications and substitutions are possible within the spirit and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited by the above-described embodiments, and various modifications and alterations are possible without departing from the scope of the claims. For example, multiple building blocks shown in the block diagrams of the embodiments can be combined into one, or one building block can be divided. [Explanation of symbols]

[0065] 1. Measurement System 10,100 measuring devices 11 Power circuit 11a Antenna 12 Wireless Communication Section 13 Bridge Circuit 14 Gauge Sensor 15 Voltage measurement circuit 16 Arithmetic circuit 17 Signal generation unit 18 Non-volatile memory unit 101 Part to be measured 101a Pressure inlet 102 Physical quantity-displacement conversion unit 102a Bourdon tube 103 Displacement-indication conversion unit 104 Mechanical indicator 20 Communication equipment (external equipment) 30 Management device 31 Network 200 workers 300 Recording Media 400 Management device

Claims

1. A measuring device, a measured part that receives a physical quantity to be measured; a power supply circuit that receives power from an external device by wireless power supply in response to the external device approaching; a wireless communication unit that performs short-distance wireless communication with the external device in response to the external device approaching; a signal generating unit that generates a signal indicating measurement data of a physical quantity received by the measured unit using the power supplied to the power supply circuit, the signal generating unit includes a voltage measuring circuit and an arithmetic circuit that are driven by the power supplied to the power supply circuit; the arithmetic circuit generates the signal based on the voltage measured by the voltage measurement circuit; the wireless communication unit transmits the signal generated by the arithmetic circuit to the external device; the signal generation unit further includes a nonvolatile storage unit; when driven only by power supplied from the external device, the arithmetic circuit causes information transmitted from the external device via the wireless communication unit to be stored in the nonvolatile storage unit; the information is a tag name for identifying the measurement device, The wireless communication unit transmits the information stored in the nonvolatile storage unit to the external device together with a signal indicating the measurement data generated by the arithmetic circuit.

2. 2. The measuring device according to claim 1, The information further includes the date and time of the previous acquisition of measurement data.

3. 3. The measuring device according to claim 2, The measurement device obtains the elapsed time from the acquisition date and time of the previous measurement data to the acquisition date and time of the new measurement data.

4. 3. The measuring device according to claim 2, The information further includes previous measurement data.

5. 5. The measuring device according to claim 1, The information further includes information about an installation location of the measurement device.

6. 5. The measuring device according to claim 1, The wireless communication unit communicates with the device by a communication method conforming to the NFC (Near Field Communication) standard. and a measuring device that performs short-range wireless communication with the external device.

7. 5. The measuring device according to claim 1, The measuring device further comprises a mechanical indicator that indicates, by mechanical operation, a displacement corresponding to a physical quantity received by the measured portion as a value indicating the physical quantity.

8. A method of measuring a temperature and humidity using an external device, comprising: a measuring device; an external device capable of supplying power to the measuring device and communicating with the measuring device in response to proximity to the measuring device; and a management device for managing measurement data of the measuring device; The measuring device is a measured part that receives a physical quantity; a power supply circuit that receives power from the external device by wireless power supply in response to the external device approaching; a wireless communication unit that performs short-distance wireless communication with the external device in response to the external device approaching; a signal generating unit that generates a signal indicating measurement data of a physical quantity received by the measured unit using the power supplied to the power supply circuit, the signal generating unit includes a voltage measuring circuit and an arithmetic circuit that are driven by the power supplied to the power supply circuit; the arithmetic circuit generates the signal based on the voltage measured by the voltage measurement circuit; the wireless communication unit transmits the signal generated by the arithmetic circuit to the external device; the signal generation unit further includes a nonvolatile storage unit; when driven only by power supplied from the external device, the arithmetic circuit causes information transmitted from the external device via the wireless communication unit to be stored in the nonvolatile storage unit; the information is a tag name for identifying the measurement device, the wireless communication unit transmits the information stored in the nonvolatile storage unit to the external device together with a signal indicating the measurement data generated by the arithmetic circuit; The external device transmits a signal transmitted from the measurement device to the management device via a network, and includes a display unit that displays the measurement data indicated in the signal transmitted from the measurement device.

9. A method for controlling a measurement device having a measured unit that receives a physical quantity, comprising: receiving power from an external device by wireless power supply in response to the external device approaching; generating a signal indicating measurement data of a physical quantity received by the measured unit using the supplied power; transmitting the generated signal to the external device via wireless communication; the measuring device includes a voltage measuring circuit and an arithmetic circuit that are driven by power supplied by the wireless power supply; In the step of generating a signal, the arithmetic circuit generates the signal based on the voltage measured by the voltage measurement circuit; The measurement device further includes a nonvolatile memory unit, when driven only by power supplied from the external device, the arithmetic circuit stores information transmitted from the external device via the wireless communication in the nonvolatile storage unit; the information is a tag name for identifying the measurement device, a control method for transmitting information stored in the nonvolatile storage unit to the external device together with a signal indicating the measurement data generated by the arithmetic circuit;

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