JP2016208067A - Remote monitoring system and terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption in a terminal device provided in a monitor target in a remote monitoring system.SOLUTION: The remote monitoring system includes: a terminal device 2 provided in a monitor target; and a monitoring server to which monitor information on the terminal device 2 is transmitted. The terminal device 2 includes: a CPU 4 which performs monitoring control of the monitor target; and power generation devices 9A-9C which generate electricity by an energy harvesting technique. The CPU 4 changes over, at a preset period, between an operating state for processing an input signal from the monitor target and a standby state for suppressing power consumption, to perform monitoring. Further, in the standby state, the CPU 4 receives an input signal from the monitor target, and performs a changeover from the standby state to the operating state based on the received input signal. Also, The terminal device 2 includes a power supply for each function (CPU 4 and communication unit 6) to control power consumption function-by-function.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a remote monitoring system and a terminal device of a remote monitoring system. In particular, the present invention relates to a power saving control technique for a terminal device.

  In a remote monitoring system, in general, a large number of slave station devices (terminal devices) are connected to a master station device (server) via a dedicated line or a public line, and monitor data is transmitted and received when a certain period or change occurs, and monitored devices, etc. Is monitored (for example, Patent Documents 1 and 2). In the case of a remote monitoring control system, control data is transmitted and received in addition to the monitoring data, and the monitoring target device and the like are controlled.

  In recent years, energy saving technology (environmental power generation technology) that obtains electric power from energy such as room light, heat, vibration, etc. has progressed as power saving of microcomputers, wireless devices, and sensors of terminal devices has progressed. The application of energy harvesting technology in an apparatus has attracted attention (for example, Patent Documents 3 and 4).

JP 2004-362510 A JP 2005-073131 A JP 2014-007486 A JP 2012-029020 A

  However, since the power obtained by the energy harvesting technology is weak, communication cannot be performed if the amount of power generated by the energy harvesting technology is not sufficient, and it is difficult to reliably communicate at a fixed time. There is a fear.

  Further, if a separate control power supply is provided, power supply work is required for laying the terminal device, and costs and labor are required for laying the terminal device.

  For these reasons, further power saving of the terminal device is required in order to operate the terminal device with the weak power obtained by the energy harvesting technology.

  In view of the above circumstances, an object of the present invention is to provide a technique that contributes to power saving of a terminal device.

  A remote monitoring system of the present invention that achieves the above object is a remote monitoring system having a terminal device that acquires monitoring information from a monitoring target and a monitoring device that receives the monitoring information of the terminal device via a communication line. Then, the terminal device provides the monitoring device with a processing unit that performs monitoring control of the monitoring target based on an input signal acquired from the monitoring target, a power generation device that generates power by energy harvesting technology, and monitoring information of the terminal device. A communication unit for transmitting, and the processing unit has an operation state in which monitoring control of the monitoring target is performed based on the input signal in a predetermined cycle, and a standby state in which power consumption is suppressed. Switching to perform monitoring control of the monitoring target, receiving the input signal in the standby state, and switching from the standby state to the operating state based on the received input signal. It is a symptom.

  In addition, the terminal device of the present invention that achieves the above-described object includes a processing unit that performs monitoring control of a monitoring target, a power generation device that generates power using environmental power generation technology, and supervises monitoring information of the monitoring target via a communication line. A communication unit that transmits to the apparatus, and the processing unit is configured to perform monitoring control of the monitoring target based on an input signal acquired from the monitoring target and power consumption at a predetermined cycle. The monitoring state of the monitoring target is switched by switching to the suppressed standby state, the input signal is received in the standby state, and the standby state is switched to the operating state based on the received input signal. It is characterized by that.

  According to the above invention, the power consumption of the terminal device is reduced.

1 is a schematic diagram of a remote monitoring system according to an embodiment of the present invention. It is a block diagram of the terminal device which concerns on embodiment of this invention. It is a block diagram explaining the outline of the terminal device which concerns on embodiment of this invention. (A) The flowchart which shows the processing procedure of sleep state cancellation based on AI signal, (b) The flowchart which shows the processing procedure when interruption occurs. It is a block diagram of a power supply circuit. It is a figure which shows an example of the electric current value which flows at the time of operation | movement of a terminal device. It is explanatory drawing explaining a circuit structure. It is an external view of a terminal device.

  A remote monitoring system and a terminal device according to an embodiment of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) Transition from sleep state to operating state based on AI signal or DI signal (1) Basic configuration FIG. 1 is a diagram showing a basic configuration of a remote monitoring system 1 according to an embodiment of the present invention. The basic configuration of this system has already been proposed (for example, Japanese Patent Application Laid-Open No. 2006-033441), and the terminal device (wireless tmetering device) 2 determines the monitoring target 3 based on the input signal from the monitoring target 3. A CPU (microcomputer) 4 that performs monitoring, and a communication unit 6 that transmits information processed by the CPU 4 to an upper monitoring server 5 are provided.
(2) Specific Configuration As shown in FIG. 2, the terminal device 2 includes a control circuit board 2a and a power supply IO circuit board 2b. The control circuit board 2a is mounted with the CPU 4, the communication unit 6 and the like, and the power IO circuit board 2b is a digital input (DI) circuit 7a, 7b, a digital output (DO) circuit 7c, an analog input (AI) circuit 8 and energy. Mount the harvesting power supply circuit 9 and the like.

  The CPU 4 monitors the monitoring target 3 based on input data from the monitoring target 3 (for example, input data from various sensors such as an acceleration sensor provided in the wind turbine generator and a water level meter that measures the water level in the pipe). Monitoring and collecting monitoring information. The CPU 4 performs monitoring control by switching between an operating state in which monitoring control based on input data from the monitoring target 3 is performed and a sleep state in which power consumption is reduced and waits. Therefore, the CPU 4 has activation conditions from various sleep states. For example, as a start condition from the sleep state, a start based on an input signal from the digital input circuit 7 a or the analog input circuit 8, a periodic start by the built-in periodic start circuit 10, and a start signal from the monitoring server 5 It has start-up conditions such as start-up.

  The communication unit 6 transmits the measurement / monitoring result to a higher system. The communication unit 6 transmits these pieces of information via a communication line (for example, a 3G / LTE communication line) of a mobile phone network. In addition to the communication unit 6, the terminal device 2 includes other communication units such as a Bluetooth (registered trademark) communication unit 11, a USB communication unit 12, and a specific low power wireless communication unit 13.

  The Bluetooth (registered trademark) communication unit 11 is an information transmission unit with a device close to the terminal device 2 and enables wireless communication with a PC / tablet in the field. In Bluetooth (registered trademark), information is transmitted by performing pairing to a device arranged close to the terminal device 2.

  The USB communication unit 12 is directly connected to the maintenance port, and data is input / output by wire. The USB communication unit 12 enables settings by a computer or the like via an external interface serial port. For example, the terminal device 2 reads a setting file set in advance via the USB communication unit 12 to allow the terminal to The apparatus 2 is set.

  The specific low-power wireless communication unit 13 constructs a wireless network such as between the terminal devices 2. For example, a function in which the upper terminal device 2 transmits and relays information by constructing local wireless communication between the upper terminal device 2 and the lower terminal device 2 using specific low power radio or the like. It will have. In this way, by performing communication by relaying between a plurality of terminal devices 2, it is possible to increase the transmission distance and to transmit information via another route when a communication failure occurs. Further, by collecting the information of the terminal device 2 on the terminal side into the higher-level terminal device 2 and transferring it to the higher-level system, the higher-level terminal device 2 functions as an access point or router for the communication line of the cellular phone network. be able to.

  The energy harvesting power supply circuit 9 uses, for example, an energy harvesting technology (environmental power generation technology) such as a heat (temperature difference) power generation device 9A, a vibration power generation device 9B, and a light power generation device 9C (indoor light, solar power generation device). This is a circuit to which the power generation device connected is connected. In the terminal device 2 according to the embodiment, the energy harvesting power supply circuit 9 will be described by exemplifying a form including a thermoelectric generation circuit 9a, a vibration power generation circuit 9b, and a photovoltaic power generation circuit 9c. In this case, an energy harvesting power source corresponding to the installation environment of the terminal device 2 is provided.

  The thermoelectric generator 9a is connected to a thermoelectric generator 9A that generates an output voltage due to a temperature difference between Peltier elements and the like. The thermoelectric generator 9A can efficiently use the waste heat generated by the heat generating portion, the fins, and the like.

  The vibration power generation circuit 9b is connected to a vibration power generation device 9B that generates electric power by vibration of a vibration power generation element (for example, a piezoelectric element such as an MFC (MACRO FIBER COMPOSITE), a piezoelectric element, or an electred electrode). The vibration power generation element generates power by resonance and outputs AC power in a vibration environment of several Hz to several hundred kHz. In the case of MFC as an example of the vibration power generation device 9B, output energy of no load is about 360 Vp-p, output current is about 0.5 mA, and output power is about 10 mW.

  The photovoltaic power generation circuit 9c is connected to a photovoltaic power generation device 9C such as an illumination photovoltaic power generation device or a photovoltaic power generation device. Illumination photovoltaic power generation devices include, for example, integrated amorphous silicon solar cells, dye-sensitized photovoltaic power generation devices, and the like. When the room illuminance is 50 to 5,000 lux, the no-load voltage is about 7 V, and the output current is A power energy of about several mA and output power of about several hundred mW can be obtained. Moreover, as a solar power generation device, there are a solar panel, a solar power generation module, and the like. When the outdoor illumination is 50,000 to 100,000 lux, the output voltage at no load to several tens of volts, the output current to several Electric power energy of about 100 mA, output power to several hundred mW can be obtained.

Since the power obtained by the energy harvesting power source is weak, the power source IO circuit board 2b is provided with the external power source circuit 14 and the charge / discharge circuit 15. A primary battery such as a lithium ion battery is connected to the external power supply circuit 14. The charge / discharge circuit 15 is connected to a secondary battery (such as a lithium ion battery, a capacitor, or a lead storage battery) that is charged with power from an energy harvesting power source.
(3) Intermittent operation of terminal device 2 With reference to FIG. 3, the operation of the terminal device 2 will be described in detail.

  The terminal device 2 includes a power supply circuit 9 having a mechanism in which the CPU 4 operates based on the power supplied from the power supply circuit (for example, the energy harvesting power supply circuit 9) and can be opened and closed for each divided functional unit. Have. Further, the terminal device 2 has a function of starting from the sleep state in response to an input signal from the digital input circuit 7 a or the analog input circuit 8 in addition to the periodic startup circuit 10.

  That is, the AI signal can be input to the CPU 4 from the analog input circuit 8 when the CPU 4 is in the sleep state, and the CPU 4 transitions from the sleep state to the operating state according to the input signal. The CPU 4 can receive a DI signal from the digital input circuit 7a when the CPU 4 is in the sleep state, and the CPU 4 transits from the sleep state to the operating state in accordance with the input signal.

  When the CPU 4 is activated, the analog value can be further A / D converted by the analog input circuit 8 to obtain a measured value, or the state of DI can be monitored. Further, by turning on the power of the necessary functional parts to the power supply circuit 9, for example, information on the setting switch 20 and information on the function selection switch (for example, the rotary switch 18) are passed through the logic circuit 17. It is possible to read and select the function after activation. The result is displayed on the display unit 19. Information can be transmitted to the monitoring server 5 via the communication unit 6 as necessary. Depending on the command from the monitoring server 5, it is possible to output the output via the digital output circuit 7c to the outside.

(3.1) Transition from Sleep State to Operation State by AI Signal In the analog input circuit 8, a threshold value is set in advance, and when an input amount exceeding the set threshold value occurs, the CPU 4 An interrupt is made and the sleep state is changed to the active state. More specifically, when an external analog input change amount is connected to a comparison interrupt circuit by a comparator of the analog input unit of the CPU 4, the change in the analog amount exceeds a preset threshold value. Can be shifted from the sleep state to the activated state.

  With reference to FIG. 4 (a) and (b), the transition procedure from a sleep state to an operation state is demonstrated.

  First, as shown in FIG. 4 (a), the CPU 4 has a low power consumption mode (sleep state) in which only a part of hardware operates, and is normally wasted by waiting in the sleep state. The current is suppressed (step s1).

  When the AI signal input from the analog input circuit 8 to the CPU 4 exceeds a preset threshold value, the CPU 4 performs an interrupt process (step s2).

  In the interrupt processing, as shown in FIG. 4B, the interrupt factor is analyzed (step s3), and event processing corresponding to the interrupt factor is performed (step s4). Then, after the event process is completed, the CPU 4 is again shifted from the operating state to the sleep state (step s5).

(3.2) Transition from Sleep State to Operation State by DI Signal The terminal device 2 includes a digital input circuit 7a. The digital input circuit 7a receives an external contact signal, an external voltage level, and an external current signal. It has a digital input section provided with an insulating element for insulation processing.

  In the digital input circuit 7a, the CPU 4 interrupts the signal in response to a change in the state of the external signal, for example, a logic "0" to a logic "1", that is, an external signal "OFF" to "ON". By connecting to the circuit that becomes the activation factor, the CPU 4 is shifted from the sleep state to the activated state by an interrupt. The activated CPU 4 examines the logic of the DI signal again and performs state change processing (monitoring control processing according to the state change).

(3.3) Transition from sleep state to operation state by other signals The terminal device 2 further transitions from the sleep state to the operation state in accordance with input signals from the periodic activation circuit 10 and the upper monitoring server 5. It has a function to perform. These functions are described in detail in Patent Document 4 (Japanese Patent Laid-Open No. 2012-029020).

  The CPU 4 is connected to the periodic activation circuit 10 and is transitioned from the sleep state to the operation state every preset period. For example, the periodic activation circuit 10 is constituted by a general clock IC called an RTC (real time clock), and can output a signal at a time designated by the CPU 4 by setting the current time and any setting. With this signal, the terminal device 2 can execute a predetermined operation by turning on the divided power to the CPU 4, the communication unit 6, the sensor 16, or the like. The activated CPU 4 checks the activation factor register at this time, thereby analyzing the activation factor and performing processing according to the activation factor. The process at this time is a periodic monitoring operation, and the collected monitoring data is transmitted to the monitoring server 5. After this process, the CPU 4 again transitions to the power saving mode (standby mode). Note that the CPU 4 can change to an operating state and perform a predetermined operation by an alarm setting function of a calendar IC (RTC) provided externally, instead of a built-in timer counter.

  Similarly, the activation by the call from the monitoring server 5 to the communication unit 6 is configured by the standby mode circuit of the communication unit 6, which can make a call from the monitoring server 5 or wait for the communication unit 6 by mail connection processing. When a call is made from the mode circuit, an activation signal for the operating power supply can be issued. With this signal, the terminal device 2 can turn on the power corresponding to the function divided into the CPU 4, the communication unit 6, the sensor 16, and the like to execute a predetermined operation. The activated CPU 4 analyzes the activation factor by checking the activation factor register at this time, and performs processing according to the activation factor. The processing at this time is execution of non-periodic monitoring operation such as when monitoring data is urgently needed, and the collected monitoring data is transmitted to the monitoring server 5 as an event occurrence (alarm).

  According to the terminal device 2 and the remote monitoring system 1 of the present embodiment as described above, the AI signal is obtained by causing the CPU 4 to transition from the sleep state (non-operating state) to the operating state according to the condition of the AI signal or the DI signal. Alternatively, it is possible to realize a function similar to that the condition monitoring of the DI signal is always performed with power saving.

  That is, by changing the CPU 4 from the sleep state to the operating state by the interrupt process using the sensor signal to be monitored by the AI signal or the DI signal, the state of the sensor signal can be changed even when the CPU 4 is not operating (sleeping). When this state change satisfies a specific condition, monitoring control (for example, data collection) can be started by a command from the CPU 4.

  When an AI signal is input, an interrupt is generated not only when the AI signal exceeds the threshold value, but also when the AI signal falls below the threshold value from a state where the AI signal exceeds the threshold value. By setting the condition, it is possible to grasp the time that the AI signal exceeds the threshold value. Similarly, when a DI signal is input, an interrupt is not only applied when a signal indicating a state change is input, but also when a signal indicating that the original state has been restored is input. Thus, it is possible to grasp the time when the DI signal is turned on.

  Further, the terminal device 2 can be operated intermittently to reduce the power consumption of the terminal device 2. In particular, by setting the cycle of this intermittent operation within a cycle cycle in which the total of the power consumption in the operating state and the sleep state of the terminal device 2 is operable within the amount of power obtained by the energy harvesting power source, Remote monitoring of the monitoring target 3 can be performed with less. In this case, the period of the intermittent operation is determined by the output of the energy harvesting power source provided in the terminal device 2 and the power consumption of the terminal device 2. For example, an indoor photovoltaic module generates electricity in a room with a brightness of 2,000 lux, and when a load (20 mA during operation, 0.1 mA during sleep) is operated for 10 seconds, intermittent operation is performed at intervals of 3.5 minutes. It becomes possible.

(Embodiment 2) Energy harvesting power supply circuit In this embodiment, the energy harvesting power supply circuit 9 of the terminal device 2 shown in FIG. 2 will be described. The terminal device 2 includes an energy harvesting power source that collects energy existing in nature and obtains power in addition to a driving power source using a primary battery such as a lithium battery. The power of the energy harvesting power source is very weak energy, and since the energy that can be harvested varies depending on the installation environment of the terminal device 2, it is preferable to have a plurality of energy harvesting power sources.

  The energy harvesting power is stored in a capacitor or a secondary battery, and the terminal device 2 is operated intermittently when necessary. If the amount of power generated by the energy harvesting power supply exceeds the power consumption of the terminal device 2 during sleep, the power from the energy harvesting power supply can be stored during sleep.

  As shown in FIG. 5, for example, a primary battery, a USB power supply (5 V), and an external power supply (5 V / 3.6 V) are connected to the input side of the energy harvesting power supply circuit 9. Further, on the input side of the energy harvesting power supply circuit 9, as an energy harvesting power supply, for example, a temperature difference power generation element (thermoelectric power generation apparatus 9A), a vibration power generation element (vibration power generation apparatus 9B), a photovoltaic power generation element (photovoltaic power generation apparatus) 9C) etc. are connected.

  Each power supply circuit corresponding to the power supply connected to the input side of the energy harvesting power supply circuit 9 is provided with connection portions J11 to J61 that can be opened and closed by a short-circuit piece, and the power supply circuit corresponding to the power supply to be applied is selected by the short-circuit piece. To use. Each power supply line is provided with a diode circuit having a small voltage drop, such as a Schottky diode, for protection.

  Explaining with a specific example, when using the thermoelectric generator 9A, when using the connecting portion J41, when using the vibration power generator 9B, when using the connecting portion J51, indoor light, solar power generator 9C, etc. In addition, a short-circuit piece is provided at each of the connection portions J51 and J61. When a plurality of energy harvesting power supplies are used, a plurality of short-circuit pieces are mounted. Further, the power from the energy harvesting power source is supplied to, for example, the power source A, the power source B, the power source C, and the like via the connection portion J22. When the power source D is used by further dividing the power source B, the power source D may be divided by an FET switch. For example, the power source B is a power source for the CPU 4 that controls the low power consumption operation, and always supplies 3.3 V as a 3.3 VA power source. It may be designed so that a part of 3.3V power supply can be stopped for low power consumption operation, and 3.3V may be divided and supplied as 3.3VB power supply as power supply D. Accordingly, the opening and closing of the power source A, power source C, and power source D is controlled by the CPU 4 by power control signals L10, L11, L13, and the like. Since 3.3 VA of the power supply B always uses weak power even during the sleep of the CPU 4 which is the minimum operation, there is no control signal for disconnection. Note that the connection parts J11 to J61 can be opened and closed by a switch circuit or the like. Further, the power supply switching operation of the connecting portions J11 to J61, which is a combination of the power supply circuits supplied to the power supply A, the power supply B, the power supply C, and the power supply D, is performed by a control signal from the CPU 4 by providing an electronic switch instead of a short circuit piece. May be.

  The primary battery, USB power supply (5V), external power supply (5V / 3.6V), etc. are used for the secondary battery rapid charge / discharge process, the test process before the operation of the terminal device 2, and the programming process in the manufacturing process (debug process). ) Or a parameter setting process by programming, and further used as a power source in a previous development process. When the primary battery is used, the connecting portions J11 and J12 are used. At that time, since the charging circuit is not used except for the charging process of the secondary battery, the connection portion J71 is opened. Also, when using a secondary battery, the external secondary battery is not used, and the on-board secondary battery can be used by closing the connection portion J23, and the connection portion 23 is opened. An external secondary battery can be used. The USB power source is selected by the connection unit J21, and the external power source is selected by the connection unit J31.

  According to the present embodiment, by combining power sources such as an energy harvesting power source, a primary battery, and a secondary battery, the terminal device 2 is driven with power that can be harvested by the energy harvesting power source, and surplus power is transferred to the secondary battery. The terminal device 2 can be operated by storing power. That is, the power supply work is unnecessary and the terminal device 2 can be operated independently. Further, by effectively utilizing the power obtained by the energy harvesting power source, the terminal device 2 that does not require battery replacement in the long term can be obtained.

(Embodiment 3) Circuit power consumption control for each functional unit In this embodiment, a function of performing power consumption control of a circuit for each functional unit in the terminal device 2 shown in FIG. 2 will be described.

  The CPU 4 of the terminal device 2 is activated by an interrupt activation for each set period of the built-in periodic activation circuit 10 or the counter incorporated in the CPU 4 (or based on the AI signal or DI signal), and the divided functions The power is turned on and predetermined processing is performed.

  For example, the logic circuit 17 that realizes the function of the CPU 4, the function of the three communication units, the DI / DO function, the switch, and the LED function is divided into functional units, and operating conditions are set for each divided function. For example, when the IC has a sleep function, each communication function can be set to a sleep state. Further, in a circuit without a sleep function (for example, the logic circuit 17 or the like), power is supplied through a switching circuit that can partially turn off the power, thereby reducing power consumption of the circuit. Plan.

  As shown in FIG. 5, the power supply circuit includes a plurality of power supplies A, B, C, and D, and power supplies corresponding to the respective functions are connected. Therefore, by partially turning off the power source A, the power source C, or the power source D, it is possible to shut off the power source that supplies power to the function that is not being used.

  For example, as illustrated in FIG. 6, the terminal device 2 performs power management for each function, and thus performs power management for each predetermined function (here, the functions of the CPU 4 and the Bluetooth (registered trademark) communication unit 11). Efficient use of power from energy harvesting power supplies.

  More specifically, the CPU 4 is activated from a sleep state, for example, 1 mA, and operates the terminal device 2 at 35 mA. When transmitting, operating the Bluetooth (registered trademark) communication unit 11 causes the current consumption to become 70 mA due to transmission power and the like. When the transmission process is completed and the reception mode is set, the power consumption is again 35 mA. Further, when the process is completed and the mode is shifted to the sleep mode, the state is returned to 1 mA.

  According to the present embodiment, the power consumption of the terminal device 2 can be further reduced by managing the power consumption for each function that operates. This embodiment is suitable for the remote monitoring system 1 that can cover the power of the terminal device 2 in the sleep state with the power of the energy harvesting power supply.

(Embodiment 4) Data storage function for communication loss countermeasure In this embodiment, a function for preventing loss of data in the case of a data communication failure in the terminal device 2 shown in FIG. 2 will be described.

  As shown in FIG. 7, the CPU 4 has a data holding unit such as a flash memory, an SRAM memory, and a nonvolatile memory. For example, as shown in FIG. 2, a flash memory and an SRAM memory are built in the CPU 4, and when storing a monitoring result in a large-capacity nonvolatile memory area, a log memory is prepared outside the CPU 4. To do.

  The nonvolatile memory stores the monitoring result data, the data collected by the terminal device 2 and the like in a time series. The stored data is transmitted from the communication unit 6 to the upper network at a predetermined timing.

  In this embodiment, the data to be transmitted to the upper network is stored in the non-volatile memory, thereby preventing the loss of data when a temporary communication failure occurs.

(Embodiment 5) Two-Functional Configuration of Monitoring Unit and Expansion Unit As shown in FIG. 7, the terminal device 2 is a control in which a CPU 4, a communication unit 6, a periodical activation circuit 10 and a logic circuit 17 (not shown) are mounted. The circuit board 2a and the power supply IO circuit board 2b on which the digital input circuits 7a and 7b, the digital output circuit 7c, the analog input circuit 8, the energy harvesting power supply circuit 9 and the like are mounted are configured. In other words, the basic components such as the CPU 4 and communication function are configured on the control circuit board 2a, and I / O, power supply and other variable components are collected on the power IO circuit board 2b, so that less investment is required for future support. Variations can be added.

  According to the present embodiment, the CPU 4 and the communication unit 6 can be standardized, and change of the IO unit according to the monitoring target 3 and power supply expandability according to the energy harvesting power source can be handled by changing the power supply IO circuit board 2b. It becomes.

(Embodiment 6) Function by LED Display, Selection Switch, and Execution Switch As shown in FIG. 8, the terminal device 2 includes a rotary switch 18 and four power sources, “power”, “alarm”, “communication”, and “failure”. An LED display unit 19 is provided.

  The rotary switch 18 can select, for example, 16 codes such as “0” to “F”, and a function corresponding to each code is assigned. Specifically, functions such as an abnormal code display mode, a radio wave intensity display mode, a test mode, a system reset mode, and a boot mode are assigned. Each function and a display example of each function are described in Patent Document 4 (Japanese Patent Laid-Open No. 2012-029020).

  The LED display unit 19 displays the result of the function executed by the terminal device 2. The execution result is displayed by a combination of displays on the LED display unit 19. Since the terminal device 2 is based on intermittent operation, when the setting switch 20 is pressed when the terminal device 2 is in the sleep state, the CPU 4 transitions to the operating state (start-up state). Then, the information selected by the rotary switch 18 is read and the function corresponding to the code is executed under the condition that the setting switch 20 is pressed after entering the activated state.

  According to the present embodiment, more information can be displayed with fewer combinations of the rotary switch 18 and the LED display unit 19, and maintainability is ensured.

  The remote monitoring system and terminal device of the present invention have been described in detail with reference to specific embodiments. However, the remote monitoring system and terminal device of the present invention are not limited to the embodiments, and The design can be changed within a range that does not impair the features, and the design changed form also belongs to the technical scope of the present invention.

  For example, the effect of each embodiment can be obtained by applying the functions of the terminal device according to each embodiment to the terminal device alone or in combination.

  In particular, by applying the power saving technology and the energy harvesting technology of the present invention and making the power harvested by the energy harvesting technology more than the power consumption of the terminal device, the terminal device can be self-sufficient in energy. It becomes possible. That is, no power supply work is required, and the terminal device can be operated independently.

DESCRIPTION OF SYMBOLS 1 ... Remote monitoring system 2 ... Terminal device 3 ... Monitoring object 4 ... CPU (processing part)
5. Monitoring server (monitoring device)
6 ... communication units 7a, 7b ... digital input circuit, 7c ... digital output circuit 8 ... analog input circuit 9 ... energy harvesting power supply circuit 9A ... thermoelectric generator, 9B ... vibration generator, 9C ... photovoltaic generator 9a ... thermoelectric generator Circuit, 9b ... Vibration power generation circuit, 9c ... Photoelectric power generation circuit 10 ... Circuit for regular startup 16 ... Sensor 17 ... Logic circuit

Claims (6)

A remote monitoring system comprising: a terminal device that acquires monitoring information from a monitoring target; and a monitoring device that receives the monitoring information of the terminal device via a communication line,
The terminal device
A processing unit that performs monitoring control of a monitoring target based on an input signal acquired from the monitoring target;
A power generation device that generates energy using energy harvesting technology;
A communication unit that transmits monitoring information of the terminal device to the monitoring device;
The processing unit performs monitoring control of the monitoring target at a predetermined cycle by switching between an operating state in which monitoring control of the monitoring target is performed based on the input signal and a standby state in which power consumption is suppressed. ,
The remote monitoring system, wherein the input signal is received in the standby state, and the standby state is switched to the operation state based on the received input signal. The input signal is an analog signal;
2. The remote monitoring system according to claim 1, wherein the processing unit performs switching from the standby state to the operation state when a signal equal to or higher than a preset threshold value is received. The input signal is a digital signal;
The remote monitoring system according to claim 1, wherein the processing unit performs switching from the standby state to the operating state in accordance with a change in state of the input signal. The terminal device has a power source divided at least for the function of the processing unit and the function of the communication unit,
The remote monitoring system according to any one of claims 1 to 3, wherein the processing unit controls power consumption for each power source of a function to be activated. The terminal device has a recording unit that records the monitoring information of the terminal device in time series,
The remote monitoring system according to any one of claims 1 to 4, wherein the terminal device transmits data recorded in the recording unit to the monitoring device at a predetermined timing. . A processing unit that performs monitoring control of a monitoring target;
A power generation device that generates energy using energy harvesting technology;
A communication unit that transmits the monitoring information to be monitored to a higher-level monitoring device via a communication line,
The processing unit switches the monitoring target between an operating state in which monitoring control of the monitoring target is performed based on an input signal acquired from the monitoring target and a standby state in which power consumption is suppressed at a predetermined cycle. Monitoring and control
In the standby state, the terminal device receives the input signal, and switches from the standby state to the operation state based on the received input signal.

Images