JP7110661B2 - measurement system - Google Patents

Description

The present invention relates to measurement systems.

2. Description of the Related Art Conventionally, a water level gauge is installed near a river in order to observe the water level of the river (see Patent Document 1). In order to secure the power supply to the water level gauge and to control the observation operation of the water level gauge, the station building of the control station is installed a little away from the water level gauge, and the water level gauge and the wired A control device connected to the is installed (see FIG. 8).

Various types of water gauges can be used to observe the water level of a river, and one of them is an ultrasonic water gauge 61 that is often used. The ultrasonic water gauge 61 is connected via a power line 66 to a power supply section 64 in the government building. Also, the ultrasonic water level gauge 61 is connected to the control device 62 via a communication line 65 .

The ultrasonic water level gauge 61 transmits ultrasonic pulses to the water surface, the ultrasonic water level gauge 61 receives the ultrasonic pulses reflected on the water surface, and the difference (delay) time between the wave transmission time and the wave reception time , measure the distance between the ultrasonic water level gauge and the water surface.

The control device 62 receives measurement data from the ultrasonic water level gauge 61 , calculates the water level and the like based on the received data, and displays the result on the monitor 63 .

Japanese Patent Application Laid-Open No. 2001-248129

However, monitoring the water level using the above-mentioned water level gauge required workers to visit the office of the management station on a regular basis. In addition, it was necessary for the workers to stay in the station building of the management station and monitor the water level during the warning of river flooding. In other words, in addition to the trouble of having to visit the station building, there was the problem of having to work in a restricted area where there was a risk of river flooding.

Also, as shown in FIG. 8 above, when installing the ultrasonic water level gauge 61 in a river, the wiring work of the communication line 65 and the power line 66 from the ultrasonic water level gauge 61 to the control device 62 in the station building is required. Because it was implemented, installation took a lot of time and effort, and cost a lot.

Therefore, there is a demand for a measurement system that allows workers to safely and efficiently measure the water level, etc., without requiring the labor and cost of installing a measuring device.

A fifth aspect of the present invention provides (1) one or more measuring devices , (2) one or more measuring relay devices , and (3) information transmitted from each of the above measuring devices and each of the above measuring relay devices. and an information management device that collects and manages information , wherein: (1-1) each of the above measuring devices is a measuring device that performs multi-hop communication via each of the above measuring relay devices; 1-2) Transmit ultrasonic waves to the viewing side, receive the reflected waves reflected on the viewing side, and intermittently measure the water level based on the delay value between the time of transmission and the time of reception. (1-3) wireless communication means for intermittently wirelessly communicating information including at least the measurement information measured by the measuring means by multi-hop; (1-4) the measuring means and the wireless communication (1-5) a secondary battery for supplying power to the measuring means, the wireless communication means, and the control means; and (1-6) sunlight as an electric energy. and (1-7) a charge/discharge control means for controlling charging/discharging of the secondary battery by a central processing unit . , (1-8) the information wirelessly communicated by the wireless communication means includes the voltage value of the secondary battery and the power generation amount of the solar battery; is wirelessly connected to the measuring device, receives packets transmitted from the measuring devices, and relays the packets to the information management device, (2-3) wireless communication means arranged at a high position for intermittently wirelessly communicating information including at least the measurement information measured by each of the measuring devices; and (2-4) the wireless communication means. (2-5) a secondary battery for supplying power to the wireless communication means and the control means; and (2-6) converting sunlight into electrical energy, a solar cell for supplying energy to the secondary battery; (2-7) charge/discharge control means for controlling charging/discharging of the secondary battery by a central processing unit; The information wirelessly communicated by the wireless communication means includes the voltage value of the secondary battery and the power generation amount of the solar battery of the measurement relay device, and (3-1) the information management device Communication means for receiving the measurement information, the voltage value of the secondary battery, and the power generation amount of the solar cell from the measurement relay device; and (3-2) receiving from each of the measurement devices. The water level value, which is the measured information, is compared with a first threshold value, and if the water level value is equal to or higher than the first threshold value for a predetermined period, a warning of river flooding is output to the display unit, (3-3) each of the above measuring devices; and comparing the voltage value of the secondary battery received from each measurement relay device with a second threshold value, and the voltage value of the secondary battery becomes equal to or less than the second threshold value applied to each device. or when the power generation amount of the solar cell received from each measuring device and each measurement relay device is compared with the predicted power generation amount, and the power generation amount of the solar cell falls below the predicted power generation amount is characterized by having second control section means for outputting failure information of each device to the display section .

ADVANTAGE OF THE INVENTION According to this invention, a worker can measure a water level etc. safely and efficiently, without incurring the trouble and high cost of installing a measuring device.

1 is a block diagram showing the functional configuration of a solar wireless ultrasonic sensor device according to an embodiment; FIG. 1 is a block diagram showing the functional configuration of a solar wireless relay device according to an embodiment; FIG. 3 is a block diagram showing the functional configuration of an information management server according to the embodiment; FIG. 1 is an overall configuration diagram showing the overall configuration of a water level gauge wireless monitor system according to an embodiment; FIG. It is a figure which shows the installation example of the solar wireless ultrasonic sensor apparatus which concerns on embodiment, and a solar wireless relay apparatus. It is a sequence diagram (1) which shows the remote maintenance operation|movement of the water level gauge wireless monitor system which concerns on embodiment. It is a sequence diagram (part 2) which shows the remote maintenance operation|movement of the water level gauge wireless monitor system which concerns on embodiment. It is explanatory drawing explaining the water level observation state by the conventional ultrasonic water level gauge.

(A) Main Embodiments Hereinafter, embodiments of the measurement system according to the present invention will be described in detail with reference to the drawings.

This embodiment exemplifies a case where the present invention is applied to a water level gauge wireless monitoring system for measuring the water level of a river.

(A-1) Configuration of Embodiment (A-1-1) Overall Configuration FIG. 4 is an overall configuration diagram showing the overall configuration of the water level gauge wireless monitor system according to the embodiment. First, the overall configuration of the water level gauge wireless monitor system 1 will be described.

In FIG. 4, the water level gauge wireless monitor system 1 includes three solar wireless ultrasonic sensor devices 10 (10-1 to 10-3), five solar wireless relay devices 20 (20-1 to 10-5), It has a wireless master device 30, a GW 40, and an information management server 50.

Although the number of devices arranged in the water level gauge wireless monitoring system 1 is not limited, in the water level gauge wireless monitoring system 1 of this embodiment, three solar wireless ultrasonic sensor devices 10 and five solar Description will be given assuming that the wireless relay device 20 is arranged.

In the water level gauge wireless monitoring system 1, the solar wireless ultrasonic sensor device 10, the solar wireless relay device 20, and the wireless master device 30 form a wireless network N (multi-hop network). A communication method (communication medium) between devices (between nodes) in the wireless network N is not limited.

The solar wireless ultrasonic sensor device 10 is installed to measure the water level of a river or the like. 50).

The solar wireless relay device 20 is a device that relays data transmitted from the solar wireless ultrasonic sensor device 10 (or another solar wireless relay device 20). Like the solar wireless ultrasonic sensor device 10, the solar wireless relay device 20 also operates by photovoltaic power generation.

Wireless master device 30 is a root node in wireless network N and is connected to GW 40 . The connection method between the wireless master device 30 and the GW 40 is not limited.

The GW 40 is a gateway capable of performing data (protocol) conversion processing between the wireless network N and the upper network M. FIG. The upper network M is, for example, an IP network (wide area network) capable of communicating by TCP/IP or the like.

The information management server 50 is a device that centrally manages measurement data transmitted from each solar wireless ultrasonic sensor device 10 and remotely monitors the water level of a river or the like. The information management server 50 also collects device information from each solar wireless ultrasonic sensor device 10 and solar wireless relay device 20, and remotely maintains each device.

(A-1-2) Detailed Configuration of Solar Wireless Ultrasonic Sensor Device 10 FIG. 1 is a block diagram showing the functional configuration of the solar wireless ultrasonic sensor device according to the embodiment. In FIG. 1 , the solar wireless ultrasonic sensor device 10 has an ultrasonic sensor section 11 , a thermometer 12 , a control section 13 , a wireless communication section 14 and a power supply section 15 .

The solar wireless ultrasonic sensor device 10 has at least a received wave waveform obtained by A/D (analog/digital) conversion of a received wave waveform (analog) received by the ultrasonic sensor unit 11 as an ultrasonic water level gauge. It wirelessly communicates signals including data and water level values. The solar wireless ultrasonic sensor device 10 is installed by an operator at a water level measurement location such as a river.

The ultrasonic sensor unit 11 includes an ultrasonic wave transmitting/receiving unit (not shown), functions as an ultrasonic water level gauge, and measures the water level value of the river. Various methods can be widely applied to the method of measuring the water level by the ultrasonic sensor unit 11, and the method is not particularly limited.

The thermometer 12 detects the outside air in the place where the solar wireless ultrasonic sensor device 10 is installed, and provides the controller 13 with the detected temperature information. Since the speed (sound speed) of ultrasonic pulses transmitted and received by the ultrasonic sensor unit 11 is affected by environmental information such as temperature, when installing or maintaining the solar wireless ultrasonic sensor device 10, the thermometer 12 The acquired temperature information is also transmitted to the control unit 13 .

The control unit 13 is a processing unit that controls various operations of the solar wireless ultrasonic sensor device 10 . Although the hardware of the control unit 13 is not shown, it is composed of, for example, a CPU, ROM, RAM, EEPROM, etc., and the CPU executes a processing program stored in the ROM to operate the solar wireless ultrasonic sensor. Various functions of the device 10 are implemented.

The control unit 13 measures the distance to the water surface of the river and controls the operation of measuring the water level of the river. For example, the control unit 13 controls the ultrasonic sensor unit 11 to transmit ultrasonic pulses to the water surface, receive the ultrasonic pulses reflected on the water surface by the ultrasonic sensor unit 11, and determine the transmission time and the The distance between the ultrasonic sensor unit 11 and the water surface is measured based on the delay time (transmission/reception wave delay value) from the wave reception time.

The control unit 13 performs this measurement operation intermittently to reduce power consumption. For example, the control unit 13 controls the operation of the ultrasonic sensor unit 11 and the thermometer 12 so that the measurement is performed once every 5 to 10 minutes.

Further, the control unit 13 intermittently operates the wireless communication unit 14 in order to reduce power consumption in the same manner as described above.

The wireless communication unit 14 performs wireless communication with the solar wireless relay device 20 or another solar wireless ultrasonic sensor device 10 under the control of the control unit 13 . The wireless communication unit 14 can widely apply various wireless communication techniques. For example, a wireless communication technology using a radio frequency in the 920 MHz band defined by IEEE 802.15.4 can be applied. A radio frequency is not particularly limited, and for example, a 2.4 GHz band, a 429 MHz band, or the like may be used. The 920 MHz band is preferable because it has good reachability of radio waves and a relatively high communication transmission speed.

The power supply unit 15 supplies power to each component of the solar wireless ultrasonic sensor device 10 , and has a solar cell 16 , a charge/discharge control unit 17 and a secondary battery 18 . Conventionally, it is very difficult to supply power to the water level gauge at the place where the water level gauge is installed. ing. However, in this embodiment, the solar wireless ultrasonic sensor device 10 is equipped with a power source section 15 that utilizes natural energy (sunlight energy), thereby eliminating the need to supply power from the station building.

The solar cell 16 is a photoelectric conversion device that generates electricity using solar energy, and is installed so as to receive direct sunlight. As the solar cell 16, for example, in addition to silicon solar cells, those made of various compounds are applied.

The charge/discharge control unit 17 controls charging of the secondary battery 18 and discharging of the secondary battery (power supply to each part of the solar wireless ultrasonic sensor device 10).

The secondary battery 18 is a battery capable of storing and discharging electricity using chemical reactions, and is composed of, for example, a lithium ion secondary battery, a nickel-cadmium storage battery, a lead storage battery, or the like.

(A-1-3) Detailed Configuration of Solar Wireless Relay Device 20 FIG. 2 is a block diagram showing the functional configuration of the solar wireless relay device 20 according to the embodiment. In FIG. 2 , the solar wireless relay device 20 has a control section 21 , a wireless communication section 14 and a power supply section 15 . Since the wireless communication unit 14 and the power supply unit 15 in FIG. 2 have the same functions as the wireless communication unit 14 and the power supply unit 15 in FIG. 1, detailed description thereof will be omitted.

The control unit 21 is a processing unit that controls various operations of the solar wireless relay device 20 . Although the hardware of the control unit 21 is not shown, for example, it includes a CPU, a ROM, a RAM, an EEPROM, and the like. Realize various functions of

The control unit 21 intermittently operates the wireless communication unit 14 in order to reduce power consumption. The control unit 21 controls the wireless communication unit 14 to relay data transmitted from the solar wireless ultrasonic sensor device 10 (or another solar wireless relay device 20).

(A-1-4) Detailed Configuration of Information Management Server 50 FIG. 3 is a block diagram showing the functional configuration of the information management server according to the embodiment. In FIG. 3 , the information management server 50 has a communication section 51 , a control section 52 and a monitor 53 .

The communication unit 51 is a network interface for connecting with the GW 40 via the upper network M. FIG.

The control unit 52 is a processing unit that controls various operations of the information management server 50 . Although the hardware of the control unit 52 is not shown, it is composed of, for example, a CPU, a ROM, a RAM, and an EEPROM. Realize various functions.

The control unit 52 performs control to display the measurement data (temperature value, water level value) received from each solar wireless ultrasonic sensor device 10 on the monitor 53 . In addition, the control unit 52 compares the water level value with a predetermined threshold value, for example, and if the threshold value is exceeded, indicates that caution is required for river flooding, etc. displayed on the monitor 53.

The control unit 52 also monitors 53 the device information (the power generation amount of the solar battery 16, the voltage value of the secondary battery 18, etc.) received from each device (the solar wireless ultrasonic sensor device 10 and the solar wireless relay device 20). to display. In addition, for example, the control unit 52 compares the voltage value of the secondary battery 18 with a predetermined threshold value, and if the voltage value is below the threshold value, the failure information of the device is expected because the failure of the device is expected. It is also displayed on the monitor 53 . Furthermore, the control unit 52 can remotely set the operating conditions of the ultrasonic sensor unit 11 and the like of the solar wireless ultrasonic sensor device 10 .

Further, in order to perform maintenance and inspection of the functional units of each device, the control unit 52 receives instructions from the administrator from input means (not shown) and performs control to check the functions of each device. For example, when the measurement data of the solar wireless ultrasonic sensor device 10 being monitored is questionable, the control unit 52 operates the ultrasonic sensor unit 11 and the thermometer 12 to acquire the latest measurement data. and check if the sensor function is malfunctioning. Similarly, when measurement data cannot be received from the solar wireless ultrasonic sensor device 10 being monitored, the control unit 52 operates the wireless communication unit 14 to measure the wireless reception level, and perform wireless communication. Check if the function is malfunctioning.

The monitor 53 is a device for displaying information under the control of the control unit 52, and is implemented by, for example, a liquid crystal display, an organic EL display, or the like. Note that the monitor 53 may be realized by, for example, a touch panel display and include an input function for receiving instructions from the administrator.

Further, the monitor 53 may include a sounding section such as a buzzer, and may output a warning sound together with a display upon receiving warning information or failure information from the control section 52 .

(A-2) Operation of Embodiment Next, the processing operation of the water level gauge wireless monitor system 1 according to the embodiment will be described in detail with reference to the drawings.

(A-2-1) Operation of the solar wireless ultrasonic sensor device 10 The control unit 13 operates the ultrasonic sensor unit 11 and the thermometer 12 to acquire information on the transmission/reception wave delay value and the thermometer value (temperature). and calculate the water level value based on the obtained information.

In this embodiment, the control unit 13 operates the ultrasonic sensor unit 11 and the thermometer 12 intermittently rather than constantly. This is for reducing the power consumption of the solar wireless ultrasonic sensor device 10 .

The control unit 13 also controls the measurement times of the ultrasonic sensor unit 11 and thermometer 12 . An appropriate value for the measurement time is determined in consideration of power consumption and measurement accuracy, for example.

On the other hand, the charge/discharge control unit 17 of the power supply unit 15 charges the secondary battery 18 with the energy generated by the solar cell 16 . The charge/discharge control unit 17 supplies power from the secondary battery 18 to the ultrasonic sensor unit 11 , the thermometer 12 , the control unit 13 and the wireless communication unit 14 .

Also, the charge/discharge control unit 17 collects the power generation amount value of the solar cell 16 and the voltage value of the secondary battery 18 and sends the collected information to the control unit 13 .

The control unit 13 sends to the wireless communication unit 14 together information on the power generation amount value of the solar cell 16, the voltage value of the secondary battery 18, the value of the thermometer 12, and the calculated water level value.

The wireless communication unit 14 transmits the information sent from the control unit 13 to the wireless network N (wireless master device 30). Note that the wireless communication unit 14 is intermittently operated similarly to the ultrasonic sensor unit 11 and the thermometer 12 . It is desirable that the intermittent operation cycles of the wireless communication unit 14, the ultrasonic sensor unit 11, and the thermometer 12 are synchronized. That is, it is desirable that the active wireless communication unit 14 immediately transmits information after the ultrasonic sensor unit 11 and the thermometer 12 operate to calculate the water level value.

(A-2-2) Operation of Solar Wireless Relay Device 20 In the water level gauge wireless monitor system 1 of this embodiment, the installation method of the solar wireless relay device 20 is characteristic. FIG. 5 is a diagram showing an installation example of the solar wireless ultrasonic sensor device and the solar wireless relay device according to the embodiment. In FIG. 5, a solar wireless ultrasonic sensor device 10 is installed on a structure 100 such as a bridge railing to measure the water level of a river. On the other hand, the solar wireless ultrasonic sensor device 10 is installed on a structure 200 having a certain height, such as a streetlight.

Due to the characteristics of radio, a wireless communication device can increase the communication distance by installing it in a place with a good view because radio waves travel over a wide range.

As shown in FIG. 5, since the solar wireless ultrasonic sensor device 10 measures the water level, the installation location is limited (it must be installed near the ground). Therefore, the communication distance of the solar wireless ultrasonic sensor device 10 is short. In order to compensate for this, the solar wireless repeater 20 is installed on a structure 200 having a certain height, such as a streetlight, as shown in FIG. As a result, it becomes possible to maintain a wireless communication distance within the wireless network N, and wireless communication can be performed smoothly.

The solar wireless relay device 20 relays data transmitted from the solar wireless ultrasonic sensor device 10 (or another solar wireless relay device 20). Also, the solar wireless relay device 20 transmits its own device information (for example, the power generation amount value of the solar cell 16, the voltage value of the secondary battery 18, etc.) to the wireless network N.

The data transmitted to the wireless network N is transmitted to another solar wireless relay device 20 (or solar wireless ultrasonic sensor device 10) according to a predetermined routing method, and finally transmitted to the wireless master device 30. be done.

The data received by the wireless master device 30 undergoes communication protocol conversion at the GW 40 and is transmitted to the information management server 50 via the host network M. FIG.

(A-2-3) Operation of the information management server 50 The information management server 50 collects information from the solar wireless ultrasonic sensor device 10 and the solar wireless relay device 20, and generates an alarm (river flood alarm), It outputs the failure information of the device to the monitor 53 .

Specifically, the information management server 50 outputs a river flood warning to the monitor 53 when the water level value is equal to or higher than the threshold value for a predetermined time. On the other hand, the information management server 50 outputs a water level missing measurement to the monitor 53 when the water level value is less than the threshold value for a predetermined time.

In addition, the information management server 50, for each device (solar wireless ultrasonic sensor device 10 and solar wireless relay device 20), when the voltage of the secondary battery 18 becomes equal to or less than the threshold applied to each device, the solar battery 16 When the generated current (power generation amount value) of is below the set number of days and the generated current integrated value, the failure information of each device is output.

By monitoring the water level value (including alarm information) output to the monitor 53 of the information management server 50, the administrator can maintain each device and remotely monitor the water level.

(A-2-4) Remote Maintenance Operation of Information Management Server 50 FIG. 6 is a sequence diagram (Part 1) showing the remote maintenance operation of the water level gauge wireless monitoring system according to the embodiment. In FIG. 6, the information management server 50 requests the ultrasonic sensor section 11 and the thermometer 12 of each device to perform measurement via the GW 40 and the wireless master device 30 .

The wireless master device 30 transmits a measurement request from the information management server 50 to the solar wireless ultrasonic sensor device 10 via the solar wireless relay device 20 (S101, S102).

When the measurement request is received, the solar wireless ultrasonic sensor device 10 operates the ultrasonic sensor unit 11 to acquire the transmission/reception wave delay value and acquires the temperature value of the thermometer 12 (S103).

The solar wireless ultrasonic sensor device 10 transmits the measurement results (wave transmission/reception delay value and temperature value) to the wireless master device 30 via the solar wireless relay device 20 (S104, S105). Note that the solar wireless ultrasonic sensor device 10 may transmit the transmission/reception delay value and the temperature value together with the level value.

The measurement results received by the wireless master device 30 are converted in communication protocol by the GW 40 and transmitted to the information management server 50 via the upper network M. FIG.

FIG. 7 is a sequence diagram (Part 2) showing the remote maintenance operation of the water level gauge wireless monitoring system according to the embodiment. In FIG. 7, the information management server 50 requests the wireless communication unit 14 of each device to measure the wireless reception level via the GW 40 and wireless master device 30 .

The wireless master device 30 transmits the measurement request from the information management server 50 to the solar wireless ultrasonic sensor device 10 via the solar wireless relay device 20 (S201, S202).

Upon receiving the measurement request, the solar wireless ultrasonic sensor device 10 transmits, for example, a communication confirmation packet to the surrounding solar wireless relay devices 20 (S203).

The solar wireless relay device 20 replies to the packet transmitted from the solar wireless ultrasonic sensor device 10 (S204).

When the solar wireless ultrasonic sensor device 10 (wireless communication unit 14) receives the packet from the solar wireless relay device 20, for example, it measures a Received Signal Strength Indication (RSSI) value (S205).

The solar wireless ultrasonic sensor device 10 transmits the measurement result (RSSI value) to the wireless master device 30 via the solar wireless relay device 20 (S206, S207).

The measurement results received by the wireless master device 30 are converted in communication protocol by the GW 40 and transmitted to the information management server 50 via the upper network M. FIG.

(A-3) Effect of Embodiment As described above, this embodiment has the following effects.

The solar wireless ultrasonic sensor device 10 (solar wireless relay device 20) can reduce power consumption by applying intermittent operation to the ultrasonic sensor section 11, the thermometer 12, and the wireless communication section . In addition, each device utilizes wireless communication as a communication means and natural energy (solar battery 16 and secondary battery 18) as a power source, making it possible to eliminate the need for wiring and reduce the overall size of the device. As a result, each device does not require wiring work for the power supply unit and the communication unit, and it is possible to reduce the cost of the device and shorten the installation time.

In addition, as described above, as the system (water level gauge wireless monitor system 1), the information of each device can be collectively remotely monitored by the information management server 50, and the administrator can visit the site for periodic inspection and warning No need for time monitoring. In other words, it is possible to anticipate improvements in work efficiency and safety of workers. Further, the information management server 50 can remotely monitor device failure information and the like based on the received information (RSSI, etc.), thereby improving maintenance efficiency and system stability.

In addition, since the solar wireless ultrasonic sensor device 10 is installed at a position close to the ground in order to monitor the water level of the river, the wireless communication distance is short. In order to compensate for this, by arranging the solar wireless relay device 20 at a high position as shown in FIG. 5, an improvement in communication distance and stability can be expected.

(B) Other Embodiments Although various modified embodiments have been mentioned in the embodiments described above, the present invention can also be applied to the following modified embodiments.

(B-1) In the above-described embodiments, the case where the present invention is applied to a measuring device was exemplified by taking the application of measuring the water level of a river as an example.

However, the ultrasonic water level gauge is not limited to measuring the water level of rivers. The application is not limited to the water level of a river, as long as it measures the position of the side surface of the liquid surface. For example, it may measure the liquid level of petroleum stored in a petroleum tank. Also, the viewing side is not limited to the liquid surface, and may be used to measure the amount of accumulated snow or to observe earth and sand.

(B-2) In addition, the present invention may be applied, for example, for flood monitoring of roads. For example, a portion of a culvert bridge may be fitted with a solar wireless ultrasonic sensor device 10 to remotely monitor rising water levels.

DESCRIPTION OF SYMBOLS 1... Water level gauge wireless monitor system, 10... Solar wireless ultrasonic sensor device, 11... Ultrasonic sensor part, 12... Thermometer, 13... Control part, 14... Wireless communication part, 15... Power supply part, 16... Solar battery, DESCRIPTION OF SYMBOLS 17... Charge/discharge control part, 18... Secondary battery, 20... Solar wireless relay device, 21... Control part, 30... Wireless master unit, 40... GW, 50... Information management server, 51... Communication part, 52... Control part , 53...monitor, M...upper network, N...wireless network.

Claims (5)

A measurement system comprising one or more measurement devices , one or more measurement relay devices , and an information management device that collects and manages information transmitted from each measurement device and each measurement relay device . hand,
Each measuring device is a measuring device that performs multi-hop communication via each measuring relay device,
measuring means for transmitting an ultrasonic wave to the viewing side, receiving the reflected wave reflected by the viewing side, and intermittently measuring the water level based on the delay value between the time of transmitting the wave and the time of receiving the wave; ,
wireless communication means for intermittently wirelessly communicating information including at least the measurement information measured by the measurement means by multi-hop;
a control means for controlling the operation of the measuring means and the wireless communication means;
a secondary battery for supplying power to the measuring means, the wireless communication means, and the control means;
a solar cell for converting sunlight into electrical energy and supplying the electrical energy to the secondary cell;
a charging/discharging control means for controlling charging/discharging of the secondary battery by a central processing unit ;
The information wirelessly communicated by the wireless communication means includes the voltage value of the secondary battery and the power generation amount of the solar battery,
Each measurement relay device is wirelessly connected to each measurement device, receives a packet transmitted from each measurement device, and relays the packet to the information management device,
Each measurement relay device is arranged at a position higher than each measurement device,
wireless communication means for intermittently wirelessly communicating information including at least the measurement information measured by each of the measuring devices;
a control means for controlling the operation of the wireless communication means;
a secondary battery for supplying power to the wireless communication means and the control means;
a solar cell for converting sunlight into electrical energy and supplying the electrical energy to the secondary cell;
a charging/discharging control means for controlling charging/discharging of the secondary battery by a central processing unit;
The information wirelessly communicated by the wireless communication means includes the voltage value of the secondary battery and the power generation amount of the solar battery of the measurement relay device,
The information management device is
communication means for receiving the measurement information, the voltage value of the secondary battery, and the power generation amount of the solar battery from each measurement device and each measurement relay device;
A water level value, which is measurement information received from each measuring device, is compared with a first threshold value, and if the water level value is equal to or higher than the first threshold value for a predetermined period of time, a river flood warning is displayed. on the other hand, when the water level value is less than the first threshold value for the predetermined period of time, a first control means for outputting information on missing water level measurement to the display unit;
The voltage value of the secondary battery received from each measuring device and each measuring relay device is compared with a second threshold, and the voltage value of the secondary battery is applied to each device. When it becomes equal to or less than the threshold value, or the power generation amount of the solar cell received from each measuring device and each measurement relay device is compared with the predicted power generation amount, and the power generation amount of the solar cell exceeds the predicted power generation amount. a second control section means for outputting failure information of each device to the display section when the
A measurement system characterized by: further comprising a thermometer;
The measurement system according to claim 1, wherein the information wirelessly communicated by the wireless communication means includes temperature values measured by the thermometer. 3. The measuring system according to claim 1, wherein the information management device can remotely set the operating conditions of the measuring means provided in each of the measuring devices. 4. The information management device according to any one of claims 1 to 3, wherein at a predetermined timing, the information management device requests the operation of the measuring means provided in each of the measuring devices, and acquires the information measured by the measuring means. Measurement system as described. The information management device requests, at a predetermined timing, measurement of signal strength at the time of packet reception by the wireless communication means provided in each measuring device and each measuring relay device, and provides signal strength information measured by the wireless communication means. 5. The measurement system according to any one of claims 1 to 4 , characterized in that it obtains

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