Sensing device, sensing system

Abstract

To provide a sensing device and a sensing system of low power consumption, which can surely perform initial setting.SOLUTION: A sensing device includes: a sensor; a processing circuit which has a mode change terminal and acquires measurement information from the sensor; a communication circuit which transmits transmission information corresponding to the measurement information; a power circuit which has an OE terminal and supplies a power voltage to the processing circuit; a time count circuit which generates time information; an interface circuit which has an input / output terminal; and a connection terminal to which a connection part for initial setting is connected. When the connection part for initial setting is connected to the connection terminal, predetermined potential is supplied to the mode change terminal and the OE terminal. The processing circuit checks the mode change terminal, and in the case of a predetermined state, activates in an initial setting mode, so as to set the initial setting information to the time count circuit through the connection part for initial setting and the interface circuit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a sensing device and a sensing system including the sensing device. [Background technology]

[0002] For example, Patent Document 1 discloses a wireless communication system that transmits and receives sensing information and control information via wireless communication between multiple slave units and a master unit. According to this document, the slave units are equipped with sensors that detect the status (voltage, current, gas flow rate, temperature, etc.) of devices installed in a factory or the like, and the master unit transmits control signals to the slave units, and the slave units receive the control signals from the master unit by setting their wireless units to a receiving state at a predetermined time, for example, once a day. The control information in the control signals includes the sensor sensing interval, rewriting of RTC (Real Time Clock) information, sensor and equipment inspection request information, etc. It is presumed that this information also includes initial setting information for the slave units.

[0003] Also known are sensing systems that monitor structures, such as bridges, by placing slave units on the structures. Such sensing systems for structures require long-term intermittent measurements, such as once a month or once every few months. For this reason, technologies to reduce power consumption have been adopted for the slave sensing devices to enable long-term operation. Specifically, only the timekeeping unit, including the RTC, operates continuously, while the processing circuit, including the CPU and wireless communication unit, operates intermittently, activating only at the measurement timing, for example, once a month. The processing circuit is activated / stopped by the RTC's alarm setting function. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-183215 Summary of the Invention [Problem to be solved by the invention]

[0005] However, it is difficult to reduce power consumption in the system of Patent Document 1. More specifically, a considerable amount of power is consumed when a slave device receives a control signal via wireless communication, including during standby time. Furthermore, if the specifications were such that initial settings such as RTC information were to be made via wireless communication, there was a risk that the processing circuit would not be able to be started, preventing wireless communication. More specifically, in order to start the processing circuit via the RTC, an RTC alarm setting must be made during the initial setting, but Patent Document 1 does not contain any specific description or suggestion regarding the initial setting. In other words, there has been a demand for a sensing device and a sensing system that can perform initial settings reliably and consumes low power. [Means for solving the problem]

[0006] A sensing device according to one embodiment of the present application comprises a sensor, a processing circuit having a mode switching terminal and acquiring measurement information from the sensor, a communication circuit transmitting transmission information corresponding to the measurement information, a power supply circuit having an OE terminal and supplying a power supply voltage to the processing circuit, a timing circuit generating time information, an interface circuit having input / output terminals, and a connection terminal unit to which an initial setting connection unit is connected. When the initial setting connection unit is connected to the connection terminal unit, a predetermined potential is supplied to the mode switching terminal and the OE terminal, and the processing circuit checks the mode switching terminal and, if it is in a predetermined state, starts up in initial setting mode and sets initial setting information in the timing circuit via the initial setting connection unit and the interface circuit.

[0007] A sensing system according to one aspect of the present application includes the above-described sensing device and a server. [Brief explanation of the drawings]

[0008] [Figure 1]FIG. 1 is a schematic diagram of a sensing system according to a first embodiment. [Figure 2] FIG. 1 is a block diagram of a sensing device. [Figure 3] FIG. 10 is a flowchart showing the flow of initialization processing of the sensing device. [Figure 4] FIG. 4 is a timing chart showing measurement timing. [Figure 5] FIG. 3 is a sequence diagram showing the operation of each part in this measurement. [Figure 6] FIG. 4 is a sequence diagram showing the operation of each part in the life-or-death confirmation measurement. [Figure 7] 10A and 10B are diagrams showing application examples of the sensing device according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 ***Sensing system overview*** FIG. 1 is a schematic diagram of a sensing system according to this embodiment. The sensing system 100 of this embodiment is a structural health monitoring system that monitors the health of a structure, and is composed of a plurality of sensing devices 30a, 30b, and 30c, a gateway terminal device 60, a server 70, and the like.

[0010] The sensing device 30 is a terminal device that is attached to a structure such as a bridge and performs vibration measurement. While Fig. 1 illustrates three sensing devices 30a, 30b, and 30c attached to different structures, there may be only one, or four or more. Since the sensing devices 30a, 30b, and 30c have the same configuration, in the following description, common content will be described as sensing device 30 without a subnumber.

[0011] The gateway terminal device 60 is a base station for LPWA (Low Power Wide Area) and functions as an Internet gateway. Various methods are known for LPWA, such as LoRaWAN (registered trademark), Sigfox (registered trademark), and NB-IoT, and any of these methods can be applied.

[0012] The server 70 is a master server that manages the multiple sensing devices 30. The server 70 acquires and stores transmission information from the multiple sensing devices 30. In detail, the transmission data transmitted from the sensing devices 30 is acquired and stored by the server 70 via the gateway terminal device 60 and a network NW consisting of a public wireless communication network such as the Internet. The system may be configured as a single server 70, or may include multiple servers. The functions of server 70 may be realized by distributed processing of multiple servers connected via a network. In this case, the multiple servers may operate as a single physical server, or as one or more virtual servers.

[0013] ***Terminal Device Overview*** FIG. 2 is a functional block diagram showing the configuration of the sensing device. Next, the schematic configuration of the sensing device 30 will be described with reference to FIG.

[0014] The sensing device 30 is composed of a first circuit 10, a second circuit 20, and the like. The first circuit 10 is composed of a timing circuit 11 and a power supply circuit 12, and a first power supply 15 is electrically connected to the first circuit 10. The first power supply 15 is a primary battery or a secondary battery with a power supply voltage Vbat.

[0015] The timing circuit 11 is a circuit that measures time, and in a preferred embodiment is an RTC. The timing circuit 11 is constantly powered by power from the first power source 15 and outputs time information. The time information is, for example, information specifying the year, month, day, hour, minute, and second. The time information may also include information about the day of the week. The timing circuit 11 includes an oscillator circuit that outputs a clock signal of a predetermined frequency based on an oscillator. The timing circuit 11 generates a 1 Hz clock signal by, for example, dividing the clock signal output by the oscillator circuit, and updates the time information in synchronization with the 1 Hz clock signal. The timing circuit 11 has an alarm output function, and outputs a predetermined signal from the alarm output terminal 13 to the OE terminal 14 of the power supply circuit 12 when the alarm setting time arrives. Note that, before initial setup, the timing circuit 11 is not set to a time or an alarm.

[0016] In a preferred embodiment, the power supply circuit 12 is a voltage regulator, and is a second power supply that generates a power supply voltage Vdd based on the power supply voltage Vbat of the first power supply 15. The power supply circuit 12 is provided with an OE (Output Enable) terminal 14, and when the potential of the OE terminal 14 is at a predetermined potential, the power supply voltage Vdd is output from an output terminal 17. The power supply voltage Vdd supplied from the power supply circuit 12 drives a second circuit 20 including a processing circuit 21. As an example, the power supply circuit 12 is an LDO (Low Dropout) regulator, and when the power supply voltage Vbat of the first power supply 15 is 7 to 8 V, the power supply voltage Vdd output by the power supply circuit 12 is approximately 3.3 V. However, this is not a limiting value.

[0017] The second circuit 20 is composed of a processing circuit 21, a memory circuit 22, a sensor circuit 23, a communication circuit 24, an interface circuit 25, and the like. The processing circuit 21 is configured to include one or more processors. The processing circuit 21 controls the operation of the sensing device 30 by operating in accordance with a control program stored in the memory circuit 22. The processing circuit 21 is provided with a mode switching terminal 26 that determines the mode at startup. The memory circuitry 22 is composed of memories such as RAM (Random Access Memory) and ROM (Read Only Memory). The memory circuitry 22 stores control programs and various data. The control programs include an initial setting program and a measurement program.

[0018] The sensor circuit 23 is, for example, a sensor circuit including a three-axis acceleration sensor. In this case, the sensor output information includes acceleration data in each of the three axes. Note that the sensor is not limited to a three-axis acceleration sensor, and a six-axis sensor including a three-axis acceleration sensor and a three-axis gyro sensor may be used. In this case, the sensor output information includes acceleration data in each of the three axes and angular velocity data about each axis. The sensor may be any sensor capable of detecting the state of an object, such as an inclination sensor that detects the inclination of the object or a vibration sensor that detects the vibration of the object. Alternatively, the sensor may be a temperature sensor that detects the temperature of the object or the ambient temperature.

[0019] The communication circuit 24 is a wireless communication chip or a wireless communication module for performing communication in accordance with the LPWA standard. Although the communication circuit 24 has a function for wireless transmission and reception, in a preferred example, it is designed to perform only wireless transmission in order to reduce power consumption. The interface circuit 25 is, for example, a Universal Serial Bus (USB) interface. The interface circuit 25 is provided with an input / output terminal 27 for transmitting and receiving data to and from an external device. Note that any serial interface may be used, such as a Universal Asynchronous Receiver / Transmitter (UART), a Serial Peripheral Interface (SPI), or an Inter Integrated Circuit (I2C).

[0020] A switch circuit SW1 is provided between the power supply circuit 12 and the sensor circuit 23. The processing circuit 21 controls the opening and closing of the switch circuit SW1. Similarly, a switch circuit SW2 is provided between the power supply circuit 12 and the communication circuit 24, and a switch circuit SW3 is provided between the power supply circuit 12 and the interface circuit 25. The switch circuits SW2 and SW3 are also controlled to be opened and closed by the processing circuit 21. By providing the switch circuits SW1, SW2, and SW3, it is possible to selectively drive the necessary circuits for only the necessary time, resulting in a configuration that can reduce power consumption.

[0021] In a preferred embodiment, the first circuit 10 and the second circuit 20 are mounted on a substrate 18. The substrate 18 is a rigid substrate such as a glass epoxy substrate, and has a connection terminal section 40 formed on one side thereof. The connection terminal section 40 is a connection terminal section in which a plurality of terminals are arranged, and a GND terminal 41, a first terminal 42, a second terminal 43, and a third terminal 44 are arranged. The GND terminal 41 is electrically connected to the ground terminal of the first power supply 15 . The first terminal 42 is electrically connected to the OE terminal 14 of the power supply circuit 12 . The second terminal 43 is electrically connected to the mode switching terminal 26 of the processing circuit 21 . The third terminal 44 is electrically connected to the input / output terminal 27 of the interface circuit 25. Note that the third terminal 44 is not limited to the connection terminal portion 40 provided at the end of the substrate 18, and any configuration that allows electrical connection with the initial setting connection portion 50 may be used, for example, a connector.

[0022] The initial setting connection unit 50 is a connector-like initial setting adapter used when initializing the sensing device 30. The initial setting connection unit 50 is detachably provided on the connection terminal unit 40 of the substrate 18, and is provided with a GND terminal 51, a connection terminal 52, a connection terminal 53, and a communication terminal 54 inside. When the initial setting connection part 50 is attached to the connection terminal part 40 of the substrate 18, the GND terminal 51 is electrically connected to the GND terminal 41. Similarly, the connection terminal 52 is electrically connected to the first terminal 42, the connection terminal 53 is electrically connected to the second terminal 43, and the communication terminal 54 is electrically connected to the third terminal 44.

[0023] Within the initial setting connection unit 50, the GND terminal 51, the connection terminal 52, and the connection terminal 53 are electrically connected by a wiring 55. That is, the ground potential of the first power supply 15 is supplied as a predetermined potential to the OE terminal 14 and the mode switching terminal 26. In other words, when the initial setting connection unit 50 is connected to the connection terminal unit 40, the ground potential is supplied as a predetermined potential to the mode switching terminal 26 and the OE terminal 14. Note that the configuration is not limited to one in which the wiring 55 is provided, and any configuration may be adopted as long as the predetermined potential can be supplied to the OE terminal 14 and the mode switching terminal 26. For example, the wiring 55 may not be provided, and the predetermined potential may be supplied from an external notebook PC 58 to the connection terminals 52 and 53. In this case, it is preferable to supply the predetermined potential to the connection terminal 53 (mode switching terminal 26) and then to the connection terminal 52 (OE terminal 14). The communication terminal 54 is connected to an external notebook PC (Personal Computer) 58 for initial setup via a USB cable 57. Note that the computer is not limited to a notebook PC, and any computer capable of transmitting initial setup information may be used, such as a smartphone, tablet terminal device, or desktop PC.

[0024] ***How ​​to set up the terminal device*** FIG. 3 is a flowchart showing the flow of an initial setting method for the sensing device. Next, a method for initializing the sensing device 30 will be described mainly with reference to FIG. 3, and also with reference to FIG. 2 as needed.

[0025] In step S10, the initial setting connection section 50 is attached to the connection terminal section 40 of the substrate 18. As a result, the GND terminal 51 of the initial setting connection section 50 and the GND terminal 41 of the connection terminal section 40 are electrically connected. In step S11, the connection terminal 53 of the initial setting connection section 50 is electrically connected to the second terminal 43 of the connection terminal section 40. As a result, the ground potential is supplied to the mode switching terminal 26 as a predetermined potential.

[0026] In step S12, the connection terminal 52 of the initial setting connection section 50 is electrically connected to the first terminal 42 of the connection terminal section 40. As a result, the ground potential is supplied to the OE terminal 14 as a predetermined potential. In step S13, the power supply circuit 12 is activated and supplies the power supply voltage Vdd to the second circuit 20. In other words, when the initial setting connection section 50 is connected to the connection terminal section 40, the ground potential is supplied as a predetermined potential to the first terminal 42 and the second terminal 43, and the power supply voltage Vdd is supplied from the power supply circuit 12 to the processing circuit 21.

[0027] In step S14, the processing circuit 21 starts up and checks the state of the mode switching terminal 26. Specifically, if the potential of the mode switching terminal 26 is at the Lo level of the ground potential, the process proceeds to step S15. If the mode switching terminal 26 is not at the Lo level, the process proceeds to step S17.

[0028] In step S15, the processing circuit 21 enters the initial setting mode, turns on the switch circuit SW3, and starts the interface circuit 25. In the initial setting mode, the initial setting program in the memory circuit 22 is executed, and the following processing is performed. In step S16, processing circuit 21 receives initial setting information from external notebook PC 58 for initial setting via input / output terminal 27 of interface circuit 25. The initial setting information includes time information and alarm setting information, which is time information for starting power supply circuit 12. Processing circuit 21 then sets the time information and alarm setting information of the received initial setting information in timing circuit 11. In other words, the processing circuit 21 checks the mode switching terminal 26, and if it is in a predetermined state, starts up in the initial setting mode and sets the initial setting information in the timing circuit 11 via the initial setting connection section 50 and the interface circuit 25.

[0029] In step S17, the processing circuit 21 enters the normal operation mode and performs basic measurement, which will be described later.

[0030] ***Basic measurements in normal operation mode*** FIG. 4 is an explanatory diagram of a basic measurement operation in the normal operation mode. Next, the measurement method of the sensing device 30 will be described mainly with reference to Fig. 4, and also with reference to Fig. 2 as appropriate. The horizontal axis of Fig. 4 represents time. On the vertical axis of Fig. 4, "active" represents a state in which the power supply voltage Vdd is supplied from the power supply circuit 12, and "standby" represents a state in which the power supply voltage Vdd is not supplied from the power supply circuit 12. In other words, the active period is a period in which the processing circuit 21 is operable, but not all components of the second circuit 20 are operational; for example, the sensor circuit 23, communication circuit 24, interface circuit 25, and the like, which are turned on / off by the switch circuits SW1, SW2, and SW3, have periods in which they do not operate even during the active period.

[0031] In FIG. 4, the periods during which measurement by the sensor circuit 23 and communication by the communication circuit 24 are performed are designated as measurement periods A1 and A2. The measurement periods are also referred to as main measurements. The measurement period t1, which is the interval from the start of measurement period A1 to the start of the next measurement period A2, is set to a length of approximately one month. The time t2 of measurement period A1 is approximately one hour. The same is true for measurement period A2. That is, main measurements are performed intermittently. In the example of FIG. 4, a one-hour measurement period A1 is set once a month. For example, if the alarm setting for the main measurement of the timer circuit 11 is set to the same time on the first day of each month, at the set time, a low-level signal is output from the alarm output terminal 13 to the OE terminal 14 of the power supply circuit 12, and the power supply voltage Vdd is supplied from the power supply circuit 12. Note that these periods are merely examples; the measurement period and measurement period can be set appropriately depending on the object being measured.

[0032] As described above, since the measurement cycle t1 of this measurement is long at one month, as a preferred example, the alive-or-death monitoring periods B1, B2, B3, and B4 are set once a week. The alive-or-death monitoring periods are set to confirm whether the sensing device 30 is functioning normally. The alive-or-death monitoring periods are also called alive-or-death confirmation measurements. The alive-or-dead monitoring period B1 and its measurement cycle t3 are set shorter than the measurement period A1 and its measurement cycle t1. For example, the measurement cycle t3 of the alive-or-dead monitoring period is set to a length of about one week, and the time t4 of the alive-or-dead monitoring period B1 is set to a length of about several minutes.

[0033] For example, if the alarm setting for the alive check measurement of the timing circuit 11 is set to the same time every Wednesday, when the set time arrives, a Lo level signal is output from the alarm output terminal 13 to the OE terminal 14 of the power supply circuit 12, and the power supply voltage Vdd is supplied from the power supply circuit 12. Note that these periods are just examples, and the measurement cycle and measurement period can be set appropriately depending on the object to be measured. In this way, in the basic measurement of the sensing device 30, the main measurement and the vitality confirmation measurement are intermittently performed.

[0034] FIG. 5 is a sequence diagram showing the flow of processing in the actual measurement. Next, the processing flow of each part during the measurement period A1 of the main measurement will be explained mainly with reference to FIG. 5, and also with reference to FIG. 2 as needed.

[0035] In step S101, the timing circuit 11 asserts the enable signal of the power supply circuit 12. In other words, when the alarm set time for the main measurement arrives, the timing circuit 11 outputs a Lo level signal from the alarm output terminal 13 to the OE terminal 14 of the power supply circuit 12.

[0036] In step S102, the power supply circuit 12 supplies the power supply voltage Vdd to the second circuit 20 including the processing circuit 21. In step S103, the processing circuit 21 turns on the switch circuit SW1 to activate the sensor circuit 23. The activated sensor circuit 23 performs measurement using the sensor and transmits the measurement data to the processing circuit 21. In step S104, when the measurement is completed, the processing circuit 21 turns off the switch circuit SW1 and stops the sensor circuit 23.

[0037] In step S105, the processing circuit 21 performs arithmetic processing based on the measurement information from the sensor circuit 23 to generate transmission information. The transmission information is, for example, information that serves as an index indicating whether or not an abnormality exists in the object being sensed. For example, if an acceleration sensor is installed, time-series acceleration data is acquired as the measurement information. The processing circuit 21 performs frequency conversion processing such as a Fourier transform on the time-series data, and based on the results of the Fourier transform, performs processing to obtain peak frequencies and spectral intensities at the peak frequencies as transmission information. Note that the processing circuit 21 may determine whether or not an abnormality has occurred by comparing the peak frequencies and spectral intensities obtained by calculation with peak frequencies and spectral intensities under normal conditions that have been acquired in advance. In this case, the transmission information is information indicating whether or not an abnormality has occurred.

[0038] In step S106, the processing circuit 21 turns on the switch circuit SW2 and activates the communication circuit 24. In step S107, the communication circuit 24 transmits the transmission information. Specifically, the communication circuit 24 transmits the transmission information to the gateway terminal device 60 (FIG. 1) by LPWA. The transmission information is transmitted to the server 70 via the gateway terminal device 60 and the network NW. In other words, the communication circuit 24 transmits the transmission information corresponding to the measurement information. In step S108, the processing circuit 21 turns off the switch circuit SW2 and stops the communication circuit 24.

[0039] In step S109, the timing circuit 11 negates the enable signal of the power supply circuit 12. In other words, when the measurement period A1 of the main measurement ends, the timing circuit 11 stops the Lo level signal from the alarm output terminal 13 to the OE terminal 14 of the power supply circuit 12.

[0040] FIG. 6 is a sequence diagram showing the flow of processing in the life-and-death confirmation measurement. Next, the flow of processing in each section during the measurement period B1 of the vital sign confirmation measurement will be explained mainly with reference to FIG. 6, and also with reference to FIG. 2 as needed.

[0041] In step S401, the timing circuit 11 asserts the enable signal of the power supply circuit 12. In other words, when the alarm set time for the vital check measurement arrives, the timing circuit 11 outputs a Lo level signal from the alarm output terminal 13 to the OE terminal 14 of the power supply circuit 12.

[0042] In step S402, the power supply circuit 12 supplies the power supply voltage Vdd to the second circuit 20 including the processing circuit . In step S403, the processing circuit 21 turns on the switch circuit SW1 to activate the sensor circuit 23. The activated sensor circuit 23 performs measurement using the sensor and transmits the measurement data to the processing circuit 21. Note that in the vitality confirmation measurement, it is sufficient to confirm whether the sensor circuit 23 is functioning, so it is sufficient to measure the time it takes for the first measurement data to be output. In step S404, when the measurement is completed, the processing circuit 21 turns off the switch circuit SW1 and stops the sensor circuit 23. Note that steps S403 and S404 may be omitted and the alive / dead state of the sensor circuit 23 may not be confirmed.

[0043] In step S405, the processing circuit 21 generates alive / dead monitoring information based on the measurement information from the sensor circuit 23. The alive / dead monitoring information is a specific data string that indicates the alive / dead state. Note that if the alive / dead confirmation of the sensor circuit 23 is omitted, the alive / dead monitoring information may be any dummy data.

[0044] In step S406, the processing circuit 21 turns on the switch circuit SW2 and activates the communication circuit 24. In step S407, the communication circuit 24 transmits the alive-or-dead monitoring information. In other words, the communication circuit 24 transmits transmission information corresponding to the measurement information. In step S408, the processing circuit 21 turns off the switch circuit SW2 and stops the communication circuit 24.

[0045] In step S409, the timing circuit 11 negates the enable signal of the power supply circuit 12. In other words, when the measurement period B1 of the alive / dead confirmation measurement ends, the timing circuit 11 stops the Lo level signal from the alarm output terminal 13 to the OE terminal 14 of the power supply circuit 12.

[0046] As described above, the sensing device 30 and the sensing system 100 of this embodiment can provide the following effects. The sensing device 30 comprises a sensor circuit 23 including a sensor, a processing circuit 21 having a mode switching terminal 26 and acquiring measurement information from the sensor, a communication circuit 24 transmitting transmission information corresponding to the measurement information, a power supply circuit 12 having an OE terminal 14 and supplying a power supply voltage Vdd to the processing circuit 21, a timer circuit 11 generating time information, an interface circuit 25 having input / output terminals 27, and a connection terminal section 40 to which an initial setting connection section 50 is connected.When the initial setting connection section 50 is connected to the connection terminal section 40, a predetermined potential is supplied to the mode switching terminal 26 and the OE terminal 14, and the processing circuit 21 checks the mode switching terminal 26 and, if it is in a predetermined state, starts up in the initial setting mode and sets the initial setting information in the timer circuit 11 via the initial setting connection section 50 and the interface circuit 25.

[0047] With this sensing device 30, initial setup is performed by connecting the initial setup connection unit 50, so initial setup can be performed without using wireless communication, which consumes a lot of power. Furthermore, in the initial setup using the initial setup connection unit 50, initial setup information such as alarm setting is set in the timing circuit 11, so that the processing circuit 21 can be reliably started when the alarm is set. Therefore, it is possible to provide a sensing device 30 that can perform initial settings reliably and consumes low power. Furthermore, initial settings can be easily performed by simply attaching the initial setting connection part 50. Furthermore, in the main measurement and the life / death confirmation measurement, by using specifications for wireless communication by the communication circuit 24 that are specialized for transmission, reception, which consumes a lot of power including during standby time, is not performed, thereby enabling further reduction in power consumption.

[0048] In addition, the connection terminal section 40 is provided with a first terminal 42 connected to the OE terminal 14, a second terminal 43 connected to the mode switching terminal 26, and a third terminal 44 connected to the input / output terminal 27. When the initial setting connection section 50 is connected to the connection terminal section 40, a predetermined potential is supplied to the first terminal 42 and the second terminal 43, and a power supply voltage is supplied from the power supply circuit 12 to the processing circuit 21.

[0049] According to this, a predetermined potential is supplied to the OE terminal 14 via the first terminal 42 and to the mode switching terminal 26 via the second terminal 43. Then, the power supply circuit 12, to which the predetermined potential has been supplied, supplies the power supply voltage Vdd to the processing circuit 21. Therefore, it is possible to provide a sensing device 30 that can be set up reliably (simplely) and consumes low power.

[0050] The initial setting information also includes time information and alarm setting information, which is information on the time when the power supply circuit 12 is started. This ensures that the processing circuit 21 is started up when the alarm is set.

[0051] The sensing system 100 also includes the sensing device 30 described above and a server 70 . This makes it possible to provide a sensing system 100 that allows for reliable (simple) initial setup and includes a sensing device 30 with low power consumption.

[0052] Embodiment 2 ***Specific application examples*** FIG. 7 is a diagram showing a specific application example of the sensing device according to this embodiment. Here, a specific application example of the sensing device 30 will be described. The sensing device 30 detects a physical quantity that indicates deformation of a structure when, for example, a moving object moves across the structure. A specific example of the structure is a bridge as shown in FIG.

[0053] The sensing device 30 is placed at a given position on the bridge and detects deformation when a moving object moves across the bridge. The moving object may be a train, a car, or another moving object. The structure is not limited to a bridge, but may be expanded to other man-made structures such as buildings, roads, towers, utility poles, and dams. The structure may also include natural structures such as mountains, rivers, and cliffs. The moving object is not limited to moving on the structure, but may move near the structure. For example, a building constructed near a railroad track is a structure according to this embodiment, and the sensing device 30 may detect vibrations and displacements of the building when a train passes over the track.

[0054] The sensing device 30 may also be used for maintenance of machines installed in factories and the like. For example, the sensing device 30 measures displacements and the like that accompany the operation of equipment having moving parts. The machine here may be, for example, a manufacturing device used to manufacture products, or a machine that performs packaging or the like. The machine may also be a robot that has an arm or an end effector. The object of maintenance is not limited to machines, and may also be the environment in which the machine is installed, such as a floor or wall surface. [Explanation of symbols]

[0055] 10...first circuit, 11...timekeeping circuit, 12...power supply circuit, 13...alarm output terminal, 14...OE terminal, 15...first power supply, 17...output terminal, 18...board, 20...second circuit, 21...processing circuit, 22...memory circuit, 23...sensor circuit, 24...communication circuit, 25...interface circuit, 26...mode switching terminal, 27...input / output terminal, 30...sensing device, 30a, 30b, 30c...sensing devices, 40...connection terminal section, 41...GN D terminal, 42...first terminal, 43...second terminal, 44...third terminal, 50...initial setting connection part, 51...GND terminal, 52...connection terminal, 53...connection terminal, 54...communication terminal, 55...wiring, 57...USB cable, 58...notebook PC, 60...gateway terminal device, 70...server, 100...sensing system, A1, A2...measurement period, B1...health monitoring period, SW1...switch circuit, SW2...switch circuit, SW3...switch circuit.

Claims

1. A sensor; a processing circuit having a mode switching terminal and configured to acquire measurement information from the sensor; a communication circuit for transmitting transmission information corresponding to the measurement information; a power supply circuit having an OE terminal and supplying a power supply voltage to the processing circuit; a timing circuit for generating time information; an interface circuit having input / output terminals; a connection terminal portion to which the initial setting connection portion is connected, When the initial setting connection section is connected to the connection terminal section, the mode switching terminal and A predetermined potential is supplied to the OE terminal, The processing circuit checks the mode switching terminal, and if it is in a predetermined state, switches to the initial setting mode. Start with to the timing circuit via the initial setting connection section and the interface circuit; Set the initial setting information, The connection terminal portion has a first terminal connected to the OE terminal; a second terminal connected to the mode switching terminal; a third terminal connected to the input / output terminal, When the initial setting connection portion is connected to the connection terminal portion, the predetermined potential is supplied to the first terminal and the second terminal; the power supply voltage is supplied from the power supply circuit to the processing circuit; Sensing device.

2. The initial setting information includes time information and an alarm which is time information for starting the power supply circuit. Contains the home configuration information, The sensing device according to claim 1 .

3. A sensor; a processing circuit having a mode switching terminal and configured to acquire measurement information from the sensor; a communication circuit for transmitting transmission information corresponding to the measurement information; a power supply circuit having an OE terminal and supplying a power supply voltage to the processing circuit; a timing circuit for generating time information; an interface circuit having input / output terminals; a connection terminal portion to which the initial setting connection portion is connected, When the initial setting connection section is connected to the connection terminal section, the mode switching terminal and A predetermined potential is supplied to the OE terminal, The processing circuit checks the mode switching terminal, and if it is in a predetermined state, switches to the initial setting mode. Start with to the timing circuit via the initial setting connection section and the interface circuit; Set the initial setting information, The initial setting information includes time information and an alarm that is time information for starting the power supply circuit. Contains the home configuration information, Sensing device.

4. A sensing device according to any one of claims 1 to 3; Server and Sensing system.

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