JP6095594B2 - Sensor network system, moving object, and sensor terminal power feeding method - Google Patents

Description

  The present invention relates to a sensor network system that collects information using a wireless terminal equipped with a sensor.

  In recent years, various structures such as roads, bridges, and tunnels have deteriorated over time, and there is a risk of collapse. In order to detect such deterioration of the structure and prevent accidents such as collapse, a sensor network system has been proposed. In the sensor network system, sensor terminals are installed in and around a structure, the state of the structure and the surrounding environment are measured by the sensor terminal, and the information is collected by a server.

  In general, infrastructure structures to be monitored are often huge. A large number of sensor terminals are required for the monitoring. The sensor terminal may be installed in a place where commercial power cannot be supplied, and a sensor network using a sensor terminal capable of supplying power without contact has been proposed (see Patent Document 1). If the technique of patent document 1 is used, it will become possible to charge a sensor terminal, without touching it directly after installation, and it can be operated over a long period of time.

JP 2013-42657 A

  However, the power supply method disclosed in Patent Document 1 is such that an operator holds the power supply device near the sensor terminal and charges the sensor terminal. For this reason, if the number of sensor terminals is increased, there is a problem that labor costs increase accordingly and it takes time.

  Further, the installation location of the sensor terminal is not necessarily a location where workers can easily approach. For example, the worker has to go far away or go to a dangerous place such as a high place.

  The objective of this invention is providing the sensor network system which can charge a sensor terminal, even if an operator does not go to the installation place of a sensor terminal.

  A sensor network system according to an aspect of the present invention is a sensor network system that collects information measured by a sensor using a server, includes a power supply device and a sensor, operates with the power supplied from the power supply device, and the sensor The sensor terminal that transmits the sensor information measured in Step 1, the server that acquires and records the sensor information transmitted from the sensor terminal, and moves to the installation location of the sensor terminal and charges the power supply device of the sensor terminal And a mobile body that performs mobile power supply for supplying electric power.

  ADVANTAGE OF THE INVENTION According to this invention, even if an operator does not go to the installation place of a sensor terminal, the sensor network system which can charge a sensor terminal can be provided.

1 is a block diagram illustrating a sensor network system according to a first embodiment. It is a figure which shows the message structure of the electric power feeding request | requirement by Example 1. FIG. 1 is a block diagram of a sensor terminal 1 according to Embodiment 1. FIG. 1 is a block diagram of a relay terminal 2 according to Embodiment 1. FIG. It is a figure which shows an example of the sensor data sent to the database server 4 by Example 1. FIG. It is a block diagram of the database server 4 by Example 1. FIG. It is a figure which shows an example of the terminal information database 45 by Example 1. FIG. It is a figure which shows an example of the electric power feeding area database 44 by Example 1. FIG. 1 is a block diagram of an airship 5 according to Embodiment 1. FIG. 3 is a flowchart illustrating an operation of the entire sensor network system according to the first embodiment. It is a block diagram of the airship 5 by Example 2. FIG. FIG. 10 is a diagram illustrating an example of a power supply request according to the second embodiment. FIG. 10 is a diagram illustrating a power supply request according to a third embodiment. It is a block diagram of the sensor network system by Example 4. FIG. 10 is a block diagram of an airship according to a fourth embodiment. FIG. 10 is a block diagram of a controller 6 according to a fourth embodiment. It is a figure which shows an example of the data notified to the controller 6 from the database server 4 by Example 4. FIG. 10 is a block diagram of a sensor network system according to a fifth embodiment. 14 is a flowchart showing a schematic operation of the entire sensor network system according to a sixth embodiment. FIG. 10 is a block diagram of an airship 5 according to an eighth embodiment. 10 is a flowchart illustrating the operation of the entire sensor network system according to an eighth embodiment. It is a flowchart which shows operation | movement of the whole sensor network system by Example 9. It is a figure explaining a mode that the state of the bridge in which the crack produced in Example 10 was measured. It is a block diagram of the airship 5 by Example 11. FIG.

Embodiments of the present invention will be described with reference to the drawings.
Example 1

  FIG. 1 is a block diagram illustrating a sensor network system according to the first embodiment. The sensor network system is a system that collects sensor information obtained by measurement by a sensor using a server, and includes one or a plurality of sensor terminals 1, a relay terminal 2, a database server 4, and a moving body 5. The relay terminal 2 and the database server 4 are connected to a network 3 such as the Internet, a mobile phone network, and a telephone network. The relay terminal 2 and the sensor terminal 1 can directly perform wireless communication. The mobile unit 5 can communicate with the sensor terminal 1 and the database server 4 through a communication path including at least a wireless line.

  The sensor terminal 1 is a wireless terminal that has a rechargeable power supply (not shown) and a sensor (not shown), operates with power supplied from the power supply, and transmits sensor information measured by the sensor. The sensor terminal 1 is installed in a structure such as a road, a bridge, and a tunnel, for example, and measures the state of the structure and the surrounding environment with a sensor using temperature, vibration, current, strain, or the like as an index. In the present embodiment, the sensor terminal 1 transmits the obtained sensor information to the relay terminal 2.

  The relay terminal 2 transmits the sensor information received from the sensor terminal 1 to the database server 4. The relay terminal 2 is, for example, a data relay terminal that is installed one for a plurality of sensor terminals 1 in the vicinity of a structure where the sensor terminal 1 is installed. The sensor terminal 1 is assumed to be installed in a place where it is difficult to install a commercial power supply, and is configured to operate with a built-in rechargeable power supply device. However, the relay terminal 2 is not necessarily a commercial power supply facility. Not limited to this, it may operate with an external commercial power source.

  The database server 4 is a computer that acquires the sensor information transmitted from the sensor terminal 1 via the relay terminal 2 or the moving body 5 and records it in its own device.

  The moving body 5 moves to the installation location of the sensor terminal 1 and supplies charging power to the power supply device of the sensor terminal 1. This operation is referred to as mobile power feeding. The moving body 5 may be anything that moves autonomously such as a helicopter, an autonomous vehicle, an airship, etc., but here it is assumed to be an airship and will also be referred to as an airship 5.

  According to the present embodiment, since the airship 5 moves to the installation location of the sensor terminal 1 and supplies charging power, the sensor terminal 1 is charged even if no worker goes to the location where the sensor terminal 1 is installed. Can do.

  Further, the sensor terminal 1 has a function of sending battery remaining amount information indicating the remaining amount of battery of the power supply device. As an example, the sensor terminal 1 transmits battery remaining amount information together with sensor information in the same message.

  The battery remaining amount information is sent to the database server 4 via the relay terminal 2 or the airship 5. The database server 4 acquires battery remaining amount information from each sensor terminal 1, and determines whether or not charging of the sensor terminal 1 is necessary, that is, whether or not to supply power based on the remaining battery amount information. Then, the database server 4 transmits a power supply request specifying the sensor terminal 1 to be supplied with power. In the present embodiment, as an example, the database server 4 periodically transmits a power supply request at regular time intervals. This power supply request is sent to the airship 5. The airship 5 acquires a power supply request from the database server 4, moves to the installation location of the sensor terminal 1 specified by the power supply request, supplies charging power to the power supply device of the sensor terminal 1, and performs charging.

  In this embodiment, the database server 4 determines whether to charge based on the remaining battery level of the sensor terminal 1 and notifies the mobile body 5 of the sensor terminal 1 to be charged. However, it is not limited to the range of one relay terminal 2, and power can be supplied to an area that spans a plurality of relay terminals 2.

In this embodiment, as an example, the database server 4 periodically transmits a power supply request at regular time intervals. This power supply request is sent to the airship 5. The mobile body 5 acquires a power supply request from the database server 4, moves to the installation location of the sensor terminal 1 specified by the power supply request, supplies charging power to the power supply device of the sensor terminal 1, and performs charging. .

  FIG. 2 is a diagram illustrating a message configuration of a power supply request according to the first embodiment.

  The power supply request includes, for example, an area identifier D11 indicating each power supply target area, a position D12 of the power supply target area indicating the route for the airship 5 to go to the power supply target area and location information of the power supply target area, as shown in FIG. The flight route D13 in the power supply target area indicating the flight route for supplying power after the airship 5 arrives at the power supply target area, the number D14 of sensor terminals 1 that are power supply targets, and the remaining amount of the power supply 15 are reduced. Power supply target sensor terminal identifier D15 for identifying the sensor terminal 1 that is the power supply target. Here, as an example, a configuration in which one relay terminal 2 exists in one area is adopted, and the identifier of the relay terminal 2 is used as the area identifier D11. However, it is also possible to adopt a configuration in which a plurality of relay terminals 2 exist in one area. In that case, as described above, one airship for the sensor terminals 1 in the area across the plurality of relay terminals 2. It is also possible for 5 to supply power.

  When the airship 5 receives the power supply request in FIG. 2, the airship 5 moves according to a predetermined route based on the position information of the power supply target area included in the power supply request data, and supplies power to the power supply target sensor terminal 1. . Here, the area refers to an area to be monitored such as one bridge or tunnel. One relay terminal 2 and one or a plurality of sensor terminals 1 belong to one area. For example, when one relay terminal 2 and three sensor terminals 1 are installed on one bridge, one relay terminal 2 and three sensor terminals 1 are terminals belonging to the area.

  FIG. 3 is a block diagram of the sensor terminal 1 according to the first embodiment. Referring to FIG. 3, the sensor terminal 1 includes a communication unit 11, a sensor control unit 12, a power supply control unit 14, a power supply 15, a power supplied unit 16, and an RFID 17.

  The communication unit 11 performs wireless communication with the relay terminal 2 and the airship 5. The sensor control unit 12 performs zero measurement on a predetermined index value using the connected sensor 13. The power supply control unit 14 has a function of checking the remaining amount of the power supply 15. The power supply 15 is a power supply device composed of a rechargeable battery. The power-supplied unit 16 receives power from the airship 5 and supplies the power to the power source 15. The RFID 17 stores ID information unique to the sensor terminal 1 and is a small device that transmits the ID information by short-range communication, and is used to notify the airship 5 of the position of the sensor terminal 1.

  Examples of the sensor 13 connected to the sensor terminal 1 include a temperature sensor, a vibration sensor, a current sensor, and a strain sensor. The sensor terminal 1 measures the target data using the sensor 13 in accordance with a predetermined measurement rule. For example, in the case of a sensor terminal 1 for checking the safety of a bridge, strain data is measured every minute by a strain sensor installed on the bridge, and the measurement data is sent to the database server 4. The sensor terminal 1 also sends information on the remaining amount of the power supply 15 obtained by the power supply control unit 14 to the database server 4. The RFID 17 is, for example, a passive RFID, and receives an RFID read signal from the airship 5 and returns ID information of the sensor terminal 1 itself. Thereby, the airship 5 can know that the sensor terminal 1 is in the vicinity and ID information for identifying the sensor terminal 1. When charging power is supplied from the airship 5 to the sensor terminal 1, the sensor terminal 1 receives the power supplied from the airship 5 by the power-supplied unit 16 and charges the power supply 15 with the power. When the power supply is completed, the sensor terminal 1 transmits a power supply completion signal to the airship 5 through the communication unit 11 by wireless communication.

  In addition, as a power feeding method from the airship 5 to the sensor terminal 1, for example, a magnetic resonance method can be adopted. For wireless communication between the sensor terminal 1, the relay terminal 2, and the airship 5, for example, Zigbee (registered trademark), wireless LAN, or specific low-power wireless can be employed.

  FIG. 4 is a block diagram of the relay terminal 2 according to the first embodiment. Referring to FIG. 4, the relay terminal 2 includes a communication unit 21 and a data processing unit 22. The communication unit 21 performs wireless communication with one or a plurality of sensor terminals 1 belonging to the area of the relay terminal 2 and communication with the database server 4 via the network 3. The data processing unit 22 adds the relay terminal identifier to the sensor data, arranges it into a predetermined format, and transmits the prepared sensor data to the database server 4 using the communication unit 21.

  FIG. 5 is a diagram illustrating an example of sensor data sent to the database server 4 according to the first embodiment. The sensor data sent to the database server 4 includes a relay terminal identifier D21, a sensor terminal identifier D22, a measured value D23 of the sensor, and a remaining amount D24 of the power supply 15 as shown in FIG. As described above, one relay terminal 2 is installed for one area, and one or a plurality of sensor terminals 1 belong to the area or the relay terminal 2. The relay terminal identifier is obtained as information for identifying the relay terminal 2 and is used as information for identifying the area.

  The relay terminal 2 arranges the format of the sensor data received from the sensor terminal 1 as shown in FIG. 5 and transmits it to the database server 4.

  Further, any one sensor terminal 1 in the area may have a function of performing communication via the network 3 and may also have a function as the relay terminal 2. In that case, the relay terminal 2 also serving as the sensor terminal 1 is included as a power supply target, and the relay terminal 2 notifies the database server 4 of the remaining battery level as well as the remaining battery levels of the other sensor terminals 1. Also good.

  FIG. 6 is a block diagram of the database server 4 according to the first embodiment. Referring to FIG. 6, the database server 4 includes a communication unit 41, a data control unit 42, a time management unit 43, a terminal information database 45, and a power feeding area database 44.

  The communication unit 41 communicates with the relay terminal 2 via the network 3 and performs wireless communication with the airship 5.

  The data control unit 42 adds information on the type of the sensor 13 and time information (acquisition time of sensor data) by the time management unit 43 to the sensor data (measured value) and the remaining battery level received from the sensor terminal 1, Store in the terminal information database 45.

  FIG. 7 is a diagram illustrating an example of the terminal information database 45 according to the first embodiment. The terminal information database 45 includes a sensor data acquisition time D31, a relay terminal identifier D32 to which the sensor data belongs, a sensor terminal identifier D33 that is an identifier for each sensor terminal 1, a type D34 of the mounted sensor 13, and a measurement of the sensor 13. The value D35 and the remaining amount D36 of the power supply 15 are held. In this example, three sensor terminals 1 of sensor terminal ID11, sensor terminal ID12, and sensor terminal ID13 belong to the area of relay terminal ID1.

  The time management unit 43 generates time information to be added when sensor data is stored in the terminal information database 45.

  The power supply area database 44 holds in advance a relay terminal identifier for each area, area position information, a flight route in the area, the number of sensor terminals belonging to the area, and position information of the associated sensor terminal 1. FIG. 8 is a diagram illustrating an example of the power supply area database 44 according to the first embodiment. The power supply area database 44 is shown in FIG. 8 as an example of the area relay terminal identifier D41, the area position D42, the flight route D43, the number of sensor terminals D44, the sensor terminal identifier D45 to which it belongs, and the position D46 of the sensor terminal to which it belongs. It has a value as shown.

  In addition, the database server 4 transmits a power supply request to the airship 5 at a preset time interval.

  At that time, the data control unit 42 includes the sensor terminal 1 in which the remaining amount of the power supply 15 extracted from the terminal information database 45 is reduced to a preset threshold value or less, and the sensor terminal 1 in which notification of sensor data is interrupted. , And a power supply request is generated from the information of the sensor terminals 1 and the information about the power supply target area in the power supply area database 44 and transmitted to the airship 5. For example, the remaining amount of the power supply 15 may be set in advance such that 30% of the capacity when fully charged is the threshold value.

  The data control unit 42 determines the timing for transmitting the power supply request based on the time information managed by the time management unit 43 and the time interval set in advance. The time interval for transmitting the power supply request may be set to an appropriate time for each area.

  The database server 4 always recognizes whether the airship 5 is in a standby state at a standby place, is in a state of being supplied with power, or is in a state of flying for power supply (power supply flight or mobile power supply). Yes. Further, if the airship 5 is in flight for power feeding, the database server 4 can always recognize to which sensor terminal 1 it is flying.

  For example, if the airship 5 is in a power supply flight state, the database server 4 temporarily stops monitoring the remaining battery level of the power supply target sensor terminal group in the power supply flight, and when the airship 5 returns to the standby location, The monitoring of the remaining battery level for the sensor terminal group is resumed. When resuming the monitoring of the remaining battery level, as an example, the database server 4 once resets all the information regarding the remaining power level of the sensor terminal group including the data sent during the power flight by the airship 5 Then, monitoring of the remaining power of the sensor terminal group is newly started.

  Alternatively, when data indicating that the battery level is insufficient is sent from the sensor terminal 1 while the airship 5 is in a power-fed flight, the database server 4 has a list of sensor terminals that are currently subject to power supply to the airship 5, It is confirmed whether or not the sensor terminal 1 that has notified the battery remaining shortage is included. When the sensor terminal that has notified the battery shortage is not included in the current power supply target sensor terminal 1, the database server 4 adds the sensor terminal 1 that has notified the battery shortage shortage to the next power supply target. May be. At this time, if there is a sensor terminal that is presumed to have some abnormality, such as the remaining battery level remains low no matter how many times the power is supplied, the database server 4 issues an alarm to the operator or the like May be notified.

  FIG. 9 is a block diagram of the airship 5 according to the first embodiment. The airship 5 includes a communication unit 51, a GPS 52, a power supply target sensor terminal information holding unit 53, an RFID detection unit 55, a moving unit 56, and a power supply unit 54.

  The communication unit 51 performs wireless communication with the sensor terminal 1 and the database server 4. The power supply request is received by the communication unit 51.

  The GPS 52 acquires position information of the airship 5. When the sensor terminal 1 to be fed is installed in an environment such as indoors where there are many obstacles and position information cannot be obtained with high accuracy by normal GPS, an indoor GPS device that can measure the position with high accuracy even indoors. Install and use it.

  The power supply target sensor terminal information holding unit 53 holds the power supply request information received from the database server 4. Specifically, power supply target information indicating the power supply target sensor terminal 1 specified in the power supply request is held in the power supply target sensor terminal information holding unit 53.

  The RFID detection unit 55 performs near field communication with the RFID 17 of the sensor terminal 1 and acquires the sensor terminal identifier of the sensor terminal 1. Since the sensor terminal identifier of the sensor terminal 1 can be acquired, it can be confirmed that the sensor terminal 1 indicated by the sensor terminal identifier is in a position where power can be supplied.

  The moving unit 56 is a control unit that drives the airship 5 and manages its movement based on position information acquired by the GPS 52. Based on the power supply target information held in the power supply target sensor terminal information holding unit 53, the moving unit 56 drives the own apparatus so as to move to the installation location of the sensor terminal 1 to be supplied with power. Under the control of the moving unit 56, the airship 5 can move to a desired area, fly on a desired flight route, and move to a desired position where power can be supplied to the sensor terminal 1.

  The power supply unit 54 supplies power to the power supply 15 of the sensor terminal 1. When the airship 5 comes to a position where power can be supplied to the sensor terminal 1 to be supplied, the power supply unit 54 supplies charging power to the power source 15 of the sensor terminal 1.

  For example, the airship 5 moves to the power supply target area based on the position information of the power supply target area. The flight route of the power feeding flight is a fixed flight route that is set in advance so as to pass through all the sensor terminals 1 in the area. When the airship 5 detects an RFID 17 that returns a sensor terminal identifier corresponding to the power supply target sensor terminal 1 during power feeding flight, the airship 5 stops on the spot and performs power feeding to the power source 15 of the sensor terminal 1. At this time, if it is determined that the positions of the RFID detection unit 55 and the RFID 17 of the sensor terminal 1 are deviated, the movement in the direction in which the deviation is eliminated increases the efficiency of power supply. For example, the position shift can be adjusted based on the intensity of the received radio wave from the RFID 17 and the position information obtained by the GPS 52. When the charging is completed, the sensor terminal 1 transmits a power supply completion signal to the airship 5. When the airship 5 receives the power supply completion signal from the sensor terminal 1, the airship 5 ends the power supply and resumes the flight along the flight route. When the flight of the designated flight route is completed, the airship 5 determines that the power supply to the power supply target area has been completed, notifies the database server 4 of the completion of power supply, and returns to the standby position of the airship 5.

  FIG. 10 is a flowchart illustrating the operation of the entire sensor network system according to the first embodiment.

  The sensor terminal 1 periodically transmits the sensor value of the sensor 13 and the remaining data of the power supply 15 to the database server 4 via the relay terminal 2. The database server 4 adds time information to the data received from the sensor terminal 1 and accumulates it in the terminal information database 45.

  Referring to FIG. 10, when it is time to transmit a predetermined power supply request, the database server 4 extracts the sensor terminal 1 whose remaining power source 15 is reduced to a certain value or less at that time, and the sensor terminal 1 A power supply request for requesting power supply to is generated and transmitted to the airship 5 (step S101). The airship 5 receives the power supply request (step S102). Then, the airship 5 transits from the standby state to the power supply flight state, and goes to the area designated by the power supply request (step S103).

  Furthermore, the airship 5 flies on the given flight route and moves to the vicinity of the power supply target sensor terminal 1 (step S104), and further depends on the sensor terminal identifier detected by the RFID detection unit 55 to be the power supply target. The sensor terminal 1 is stopped at the installation position (step S105), and power feeding is performed (step S106). When charging of the power supply 15 is completed, a power supply completion signal is transmitted from the sensor terminal 1 to the airship 5, so that the airship 5 repeats steps S106 to S107 until it receives the power supply completion signal (step S107). NO). When a power supply completion signal is received from the sensor terminal 1 that is supplying power (YES in step S107), the airship 5 completes power supply to the power source 15 of the sensor terminal 1 (step S108).

  Subsequently, the airship 5 determines whether or not the entire flight route has been completed (step S109). If the flight route has not been completed, the airship 5 returns to step S104, moves to the next power supply target sensor terminal 1, and continues the subsequent processing. When the airship 5 finishes flying on the flight route, the airship 5 determines that the power supply to the sensor terminal 1 in the area has been completed, returns to the standby location, and ends the process (step S110).

  As described above, according to the present invention, since the airship 5 supplies power to the power supply 15 of the sensor terminal 1, it is possible to efficiently supply power to the sensor terminal 1.

  In addition, when the power supply target sensor terminal 1 is installed at a high place, the airship 5 uses the airship 5 to reach the high place by autonomous flight, so that the worker does not need to go to the high place. The danger of falling can be avoided.

  Also, if the sensor terminal 1 to be fed is restricted in access to workers such as in a power plant or factory, or if it is dangerous to enter, the airship 5 will go to the site by autonomous flight. It is not necessary for a member to go to the site, and power can be supplied to the power source 15 of the sensor terminal 1 without restriction.

Further, since the airship 5 supplies power to the power source 15 of the sensor terminal 1 by autonomous flight, it is possible to efficiently supply power to the power source 15 of the sensor terminal 1 without training experienced workers.
(Example 2)

  In the first embodiment, the database server 4 notifies the airship 5 of the flight route. However, in the second embodiment, the airship 5 itself performs a power feeding flight while determining the flight route. Since the airship 5 creates a flight route that goes around the sensor terminal 1 to be fed and feeds power to the sensor terminal 1 by the flight route, the database server 4 does not need to generate and specify the flight route.

  FIG. 11 is a block diagram of the airship 5 according to the second embodiment. As shown in FIG. 11, the airship 5 according to the second embodiment further includes a flight route determination unit 57 in addition to the configuration of the airship 5 in FIG. 9. The communication unit 51, the GPS 52, the power supply target sensor terminal information holding unit 53, the RFID detection unit 55, the moving unit 56, and the power supply unit 54 are basically the same as those in the first embodiment shown in FIG. It is.

  FIG. 12 is a diagram illustrating an example of a power supply request according to the second embodiment. As shown in FIG. 12, in Example 2, the power supply request notified from the database server 4 to the airship 5 does not include the flight route D13, and the position data D16 of the power supply target sensor terminal and the remaining battery charge D17. It is included.

  The flight route determination unit 57 determines the sensor terminal 1 to be fed based on the information on the remaining amount of the power supply 15 received from the sensor terminal 1. For example, the sensor terminal 1 in which the remaining amount of the power supply 15 is equal to or less than the threshold may be set as the power supply target. Further, the flight route determination unit 57 determines the flight route for the power supply flight from the sensor terminal identifier and position of the power supply target sensor terminal 1 and the position information of the own device obtained by the GPS 52.

At that time, the flight route determination unit 57 first detects the sensor terminal 1 that is closest to the start point (usually the standby location) of the power supply flight among the sensor terminals 1 that are the power supply targets of the power supply request in FIG. And select it as the first power supply target. Then, the moving unit 56 moves according to the flight route determined by the flight route determination unit 57 based on its own position information obtained by the GPS 52 and the position of the sensor terminal 1. At this time, when the RFID detection unit 55 detects the reception of the sensor terminal identifier from the sensor terminal 1 to be fed, the moving unit 56 stops itself on the spot, and the feeding unit 54 feeds power to the power source 15 of the sensor terminal 1. To start. When the airship 5 receives a power supply completion signal from the sensor terminal 1 that is supplying power, the airship 5 determines that charging of the sensor terminal 1 is completed, and from among the sensor terminals 1 that are not yet supplied with power, Then, the sensor terminal 1 located closest to its current position is selected as the next power supply target, and the movement of the sensor terminal 1 to the installation position is started. When the power supply to all the power supply target sensor terminals 1 is completed, the airship 5 returns to the standby place.
(Example 3)

  In the first embodiment, the flight route is fixedly determined in advance, but in the third embodiment, when the database server 4 generates a power supply request, it passes through the sensor terminal 1 that is the power supply target of the power supply request. Determine the flight route. According to this, since the airship 5 only has to patrol the power supply target sensor terminal 1, it is efficient.

  FIG. 13 is a diagram illustrating a power supply request according to the third embodiment. As shown in FIG. 13, in the third embodiment, the flight route is specified in the power supply request notified from the database server 4 to the airship 5.

  In the database server 4, the data control unit 42 determines the sensor terminal 1 to be fed based on the information on the remaining amount of power notified from each sensor terminal 1. Furthermore, the data control unit 42 is based on the information on the position of the sensor terminal 1 for each area held by the database server 4 so as to pass through the installation positions of all the sensor terminals 1 to be fed with the shortest movement distance. Determine the flight route. Alternatively, importance may be given to the sensor terminal 1 in advance, and the database server 4 may determine a flight route that preferentially supplies power to the sensor terminal 11 having a high importance.

  Examples of the flight route determination method that reduces the travel distance of the airship 5 include a nearest neighbor method and a Christophize solution. In addition, as a method of assigning importance of the sensor terminal 1, for example, a method of giving priority to the sensor terminal 1 in which the remaining amount of the power supply 15 is particularly reduced, or a sensor terminal 1 in which the operator or the database server 4 is important in advance A method that is set in the system can be adopted.

The airship 5 circulates the installation locations of the power supply target sensor terminals 1 on the determined flight route, and supplies charging power to the power source 15 of the sensor terminal 1. The airship 5 can easily go around and charge the power supply target sensor terminal 1 simply by moving according to the notified instruction.
Example 4

  In the first embodiment, the airship 5 flies autonomously according to the given flight route. However, in the fourth embodiment, the airship 5 does not fly autonomously, and the pilot controls the airship 5 by remote control.

  FIG. 14 is a block diagram of a sensor network system according to the fourth embodiment. The sensor network system according to the fourth embodiment further includes a controller 6 in addition to the configuration shown in FIG.

  FIG. 15 is a block diagram of an airship according to the fourth embodiment. As shown in FIG. 15, the airship 5 according to the fourth embodiment has a configuration in which the power supply target sensor terminal information holding unit 53 and the GPS 52 are excluded from the configuration illustrated in FIG. 9.

  The communication unit 51 performs wireless communication with the controller 6 operated by the operator.

  The moving unit 56 moves the device itself in accordance with the flight instruction from the controller 6.

  The power supply unit 54 starts and stops power supply in accordance with a power supply instruction from the controller 6.

  When the sensor terminal identifier is detected from the power supply target sensor terminal 1 by the RFID detection unit 55, information on the sensor terminal identifier is notified from the communication unit 51 to the controller 6.

  When the communication unit 51 receives the remaining amount of the power supply 15 of the sensor terminal 1, the communication unit 51 notifies the controller 6 of the information.

  FIG. 16 is a block diagram of the controller 6 according to the fourth embodiment. The controller 6 includes a communication unit 61, a power supply instruction unit 62, a movement direction instruction unit 63, and a screen display unit 64. The communication unit 61 performs wireless communication with the database server 4 and the airship 5. The power supply instruction unit 62 instructs the airship 5 to start and stop power supply to the sensor terminal 1.

  The movement direction instruction unit 63 instructs the airship 5 to move in accordance with the operation of the operator.

  The screen display unit 64 displays the sensor terminal 1 of the sensor terminal 1 to be fed, the remaining amount of the power source 15 of the sensor terminal 1, and the sensor terminal 1 that the airship 5 is approaching to the extent that RFID radio waves reach. The sensor terminal identifier of the sensor terminal 1 to which the airship 5 is supplying power is displayed. The power supply target sensor terminal 1 is determined by the database server 4 and notified to the controller 6, and the controller 6 displays it. The flight of the airship 5 is operated by the operator looking at the power supply target sensor terminal 1 displayed on the controller 6.

  FIG. 17 is a diagram illustrating an example of data notified from the database server 4 to the controller 6 according to the fourth embodiment.

  The database server 4 determines the sensor terminal 1 that needs to be fed and notifies the controller 6 of it. Upon receiving the notification, the controller 6 displays the sensor terminal identifier to be fed, the position information thereof, and the like. Alternatively, the map of the power supply target area and the position of the power supply target sensor terminal 1 may be illustrated on the screen of the controller 6.

  When the operator uses the movement direction instruction button (not shown) provided in the controller 6 to instruct the movement direction, the information is transmitted to the airship 5. Further, when the pilot uses the power supply start button or power supply stop button provided in the controller 6 to instruct the start or stop of power supply, the information is transmitted to the airship 5.

  At this time, the pilot determines the moving direction in which the pilot instructs the airship 5. The sensor terminal identifier of the power supply target sensor terminal 1 determined by the database server 4 and the remaining amount of the power source 15, the sensor terminal identifier of the sensor terminal 1 near the airship 5 notified from the airship 5, and the remaining amount of the power source 15 Is displayed as characters on the screen display unit 64, so that the information is notified to the operator.

  The controller 6 may be a dedicated terminal, or may be realized by mounting an application on a PC (Personal Computer) or a tablet terminal.

The operator carries the airship 5 to the power supply target area, and starts the flight of the airship 5. The airship 5 moves in accordance with the movement direction instruction from the controller 6. In addition, when the airship 5 receives an instruction to start or stop power supply from the controller 6, the airship 5 starts or stops power supply to the sensor terminal 1 according to the instruction. The screen display unit 64 displays the identifier of the sensor terminal 1 received by the airship 5, and the sensor terminal identifier of the sensor terminal 1 that is approaching to a distance during which power can be supplied or the RFID radio signal can be recognized at that time. To the pilot.
(Example 5)

  In the first embodiment, the database server 4 generates a power supply request and transmits it to the airship 5, but in the fifth embodiment, the power supply request generated by the database server 4 is transmitted to the airship 5 via the relay terminal 2.

  The fifth embodiment assumes a case where the airship 5 belongs to one area or a plurality of areas in a close range, and there is a standby place around the area to which the airship 5 belongs. By adopting a configuration in which the airship 5 receives a power supply request from each relay terminal 2, it is not necessary for the airship 5 to have a communication function using a wide-area wireless network, and it is only necessary to have a relatively short-range communication function. .

  FIG. 18 is a block diagram of a sensor network system according to the fifth embodiment. The sensor network includes a sensor terminal 1, a relay terminal 2, a network 3, a database server 4, and an airship 5. The basic functions of each device are the same as those in the first embodiment, but are different in the following points.

  When the database server 4 generates the power supply request, the database server 4 transmits the power supply request to the relay terminal 2 belonging to the area that is the target of the power supply request through communication via the network 3.

  When the relay terminal 2 receives the power supply request from the database server 4, the relay terminal 2 transmits the power supply request to the airship 5 belonging to the target area through wireless communication.

  The airship 5 receives the information of the flight route about the area to which it belongs from the database server 4 in advance and holds it. After that, the airship 5 is sent the information of the flight route from the database server 4 for updating only when the route is changed.

  When the airship 5 receives the power supply request from the relay terminal 2, the airship 5 moves along the flight route that has been held and performs power supply to the power supply target sensor terminal 1 specified in the power supply request.

In the present embodiment, since the airship 5 has a standby place in the vicinity of the area to which the airship 5 belongs, power can be quickly supplied in response to a power supply request.
(Example 6)

  In the third embodiment, the database server 4 generates a power supply request, but in the sixth embodiment, the relay terminal 2 generates a power supply request. Since the relay terminal 2 determines whether or not to charge from the battery level of the sensor terminal 1 and notifies the airship 5 of the sensor terminal 1 to be charged, it is suitable for a configuration in which one relay terminal 2 exists in one area. There is no need to notify the database server 4 of the remaining amount of the power supply 15 of the sensor terminal 1.

  The schematic configuration of the sensor network system of the sixth embodiment is the same as that shown in FIG.

  The sensor terminal 1 transmits the sensor information measured by the sensor 13 and the information on the remaining amount of the power supply 15 to the relay terminal 2 by wireless communication.

  The relay terminal 2 transmits sensor information among the information received from the sensor terminal 1 to the database server 4 by communication via the network 3. The database server 4 stores the received sensor information in the terminal information database 45.

  Further, the relay terminal 2 monitors the information on the remaining amount of the power supply 15 among the information received from the sensor terminal 1, and counts the number of sensor terminals 1 in which the remaining amount of the power supply 15 is reduced to a preset threshold value or less. . When the number of sensor terminals 1 whose remaining power source 15 is reduced to a predetermined threshold value or more reaches a predetermined number or more, the relay terminal 2 generates a power supply request for supplying power to those sensor terminals 1 and sends the airship 5 to the airship 5. Send.

  The airship 5 receives the information of the flight route for the area to which it belongs from the database server 4 in advance and holds it. Thereafter, the airship 5 receives flight route information from the database server for updating only when the route is changed.

  When the airship 5 receives the power supply request, the airship 5 transits from the standby state to the flight state, flies on a predetermined flight route, and supplies power to the sensor terminal 1 to be supplied with power. When the airship 5 finishes flying on the designated flight route, it determines that the power supply to the power supply target area has been completed and returns to the standby location.

FIG. 19 is a flowchart illustrating a schematic operation of the entire sensor network system according to the sixth embodiment. The flowchart in FIG. 19 differs from the flowchart in FIG. 10 in that the relay terminal 2 generates a power supply request and transmits it to the airship 5 in step S201.
(Example 7)

  In the first embodiment, the sensor terminal 1 in which the remaining amount of the power supply 15 is equal to or less than the threshold is set as the power supply target, and the power supply request is sent at regular time intervals. When the number of sensor terminals 1 reaches a predetermined number, a power supply request is sent. Since a predetermined number of sensor terminals 1 can be collectively fed, a predetermined number or more of sensor terminals 5 can be efficiently charged by one operation of the airship 5.

  The basic configuration of the sensor network system according to the seventh embodiment is the same as that shown in FIG.

  In the seventh embodiment, the database server 4 always monitors the remaining amount of the power supply 15 of the sensor terminal 1, and the number of sensor terminals 1 in which the remaining amount of the power supply 15 is reduced below a preset threshold within one area. When more than the preset number is recognized, a power supply request for requesting power supply to the sensor terminal 1 in the area is transmitted to the airship 5. The power supply request may be sent from the database server 4 to the airship 5 or may be sent to the airship 5 via the relay terminal 2. When the airship 5 receives a power supply request from the database server 4 or the relay terminal 2, the airship 5 supplies power to the sensor terminal 1 that is the power supply target in the power supply request.

Note that the flight route of the airship 5 when supplying power to the sensor terminal 1 to be supplied may be a fixed flight route that is fixed in advance, or generated by the database server 4 and sent to the airship 5 by a power supply request. The notified flight route may be used, or the flight route generated by the airship 5 itself may be used.
(Example 8)

  In the first embodiment, the airship 5 flies fixedly over the entire process of the predetermined flight route. In the eighth embodiment, the airship 5 uses the remaining amount of power in its own device while flying according to the seven flight routes. When the remaining amount decreases, the vehicle automatically returns to the standby position and charges, and when charging is completed, it returns to the flight route again. Since the airship 5 having a power supply for power supply determines its charging timing by itself, an external device such as the database server 4 and the relay terminal 2 acquires the remaining battery level of the power supply for power supply of the airship 5, and the charging timing. Is not required.

  FIG. 20 is a block diagram of the airship 5 according to the eighth embodiment. The airship 5 of the eighth embodiment differs from that shown in FIG. 9 in that it has a power supply control unit 58 and a power supply 59. The power source 59 is a power source for supplying power for charging the power source 15 of the sensor terminal 1. The power supply control unit 58 manages the remaining amount of the power supply 59 and controls the start and stop of power supply from the power supply 59. In the eighth embodiment, the moving unit 56 moves to the installation location of the sensor terminal 1, and the remaining battery level of the power source 59 is less than or equal to the threshold value during power feeding flight for supplying charging power to the power source 15 of the sensor terminal 1. When it is determined by the power supply control unit 58 that it has become, the charging flight is resumed when the charging of the power supply 59 is completed at the standby place.

  FIG. 21 is a flowchart illustrating the operation of the entire sensor network system according to the eighth embodiment. The processing in steps S309 and S310 is different from that shown in FIG.

  When the airship 5 completes the power supply to the power supply 15 of the sensor terminal 1 that was being supplied in step S308, the power supply control unit 58 checks the remaining amount of the power supply 59 provided in the airship 5 and the remaining amount is set. It is determined whether or not the threshold value is below (step S309).

If the remaining amount of the power source 59 is less than or equal to the threshold value, the power source control unit 58 instructs the moving unit 56 to pause the power feeding flight and charge it. The airship 5 moves to the standby place by the moving unit 56 instructed to charge the power source 59 and charges the power source 59 (step S310). When charging is completed, the airship 5 determines whether or not the entire flight route has been completed (step S311). If the flight route has not been completed, the airship 5 returns to the point where the power supply flight is stopped by the moving unit 56 (step S304), and resumes the power supply flight to the sensor terminal 1 to be supplied that has not been supplied with power yet. Supply power. If the remaining amount of the power source 59 is not less than or equal to the threshold value in step S309, the airship 5 proceeds to the determination in step S111.
Example 9

  In the eighth embodiment, the airship 5 autonomously returns to the standby place and performs charging when the remaining amount of the power supply 59 for power supply decreases, but in the ninth embodiment, the database server 4 includes all the sensors to be powered. It is determined whether the terminal 1 is fed all at once by one feeding flight or divided into a plurality of feeding flights. Thereby, a flight route can be planned and implemented in consideration of charging the power supply 59 for power supply of the airship 5 in advance.

  The airship 5 according to the ninth embodiment has a basic configuration similar to that shown in FIG. 20 and includes a power supply control unit 58 and a power supply 59. The power source 59 is a power source for supplying power for charging the power source 15 of the sensor terminal 1. The power supply control unit 58 manages the remaining amount of the power supply 59 and controls the start and stop of power supply from the power supply 59. In the ninth embodiment, the power supply control unit 58 checks the remaining amount of the power supply 59 while the airship 5 is waiting at the standby location, and transmits the remaining amount information of the power supply 59 to the database server 4 at predetermined time intervals. ing.

  FIG. 22 is a flowchart illustrating the operation of the entire sensor network system according to the ninth embodiment.

  First, the database server 4 selects a power supply target sensor terminal 1 on the basis of information on the remaining amount of the power supply 15 from each sensor terminal 1 (step S401). Furthermore, the database server 4 confirms information on the remaining amount of the power source 59 notified from the airship 5 (step S402).

  Subsequently, the database server 4 determines a flight route based on the number of sensor terminals 1 to be fed and the remaining power of the power supply 59 of the airship 5 (step S403), and sends a power supply request including the flight route to the airship. 5 (step S404).

  When determining the flight route and generating the power supply request, the database server 4 departs from the standby place based on the information on the remaining amount of the power supply 59 of the airship 5 and the information on the number of sensor terminals 1 to be supplied with power. Then, it is determined whether power supply to all power supply target sensor terminals 1 is performed in one power supply flight returning to the standby place or divided into a plurality of power supply flights. When power is supplied to the sensor terminal 1 to be supplied in a plurality of times, the database server 4 incorporates a return route into the flight route.

  The return route is a route in which the power feeding flight is paused on the way, flies from the point to the standby location, and then returns from the standby location to the point where the power feeding flight is paused. As a result, it is possible to pause the power feeding flight halfway, return to the standby position, charge the power supply 59, and then resume the power feeding flight from the point where the power feeding flight is paused.

  The point and timing at which the electric power supply flight is suspended may be determined so that the airship 5 is returned to the standby position before the power supply 59 of the airship 5 runs out.

  Returning to FIG. 22, when the airship 5 receives the power supply request, the airship 5 moves to the target area of the power supply request (step S406).

  Subsequently, the airship 5 moves to the installation location of the sensor terminal 1 to be powered in accordance with the flight route specified in the power feeding request (step S407), and further charges the power source 15 of the sensor terminal 1 using the RFID radio signal. It moves to a position suitable for the operation and stops (step S408). Then, the airship 5 supplies power to the power source 15 of the sensor terminal 1 (step S409), and monitors reception of a power supply completion signal from the sensor terminal 1 that is supplying power (step S410). If the airship 5 has not received the power supply completion signal, the airship 5 returns to step S409 and continues power supply.

  When the power supply completion signal is received, the airship 5 completes the power supply to the sensor terminal 1 (step S411). Subsequently, the airship 5 checks whether or not the next destination of the flight route is a standby place (step S412). If the next destination is not the standby place, the airship 5 returns to step S407, moves to the installation position of the next sensor terminal 1 to be fed, and feeds power.

  In step S412, if the next destination is a standby location, the airship 5 moves to the standby location and charges the power source 59 (step S413). Subsequently, the airship 5 determines whether or not the entire flight route has been completed (step S414). If the entire flight route has not been completed, the airship 5 returns to step S407, moves to the installation position of the sensor terminal 1 that is the next power supply target after returning to the standby location, and continues power supply.

If the flight of the entire flight route has been completed, the airship 5 ends the process at the standby location (step S415).
(Example 10)

  In the first embodiment, the sensor terminal 1 is charged and operated and the sensor information is periodically acquired. In the tenth embodiment, only the sensor terminal 1 that wants to acquire the sensor information is supplied with power only when desired. To obtain sensor information.

  The database server 4 determines the sensor terminal 1 from which sensor information is to be acquired, and transmits an information acquisition request for requesting acquisition of sensor information from the sensor terminal 1 to the airship 5. The airship 5 receives the information acquisition request, moves to the installation location of the sensor terminal 1 specified by the information acquisition request, transmits a radio wave to the power supply 15 of the sensor terminal 1, and is transmitted from the sensor terminal 1. The sensor information is received and transmitted to the database server 4. The sensor terminal 1 is a passive terminal that has a small and small capacity power source such as a capacitor as the power source 15 and performs measurement and wireless communication using the sensor 13 only while power is supplied from the airship 5. That is, the sensor terminal 1 is a circuit in which the power source 15 supplies the received radio wave energy to the sensor 13 as a power source. When power is not supplied, the sensor terminal 1 is in the off state, The measurement by 13 and the transmission of the measurement result are not performed. Since the sensor terminal 1 which is a passive terminal is operated only when sensor information is desired and sensor information is acquired, the sensor terminal 1 does not need to have a storage battery, and the airship 5 does not need to have a large capacity battery for power supply. .

  When the database server 4 determines that sensor information that is a measurement result by the sensor 13 is necessary, the power supply request (information acquisition request) for requesting the airship 5 to supply power to the corresponding sensor terminal 1 at that timing. Send). For example, a case is assumed where a crack is found in a structure to be monitored and it is desired to acquire information on the surrounding state.

  FIG. 23 is a diagram illustrating a state in which the state of a bridge in which a crack has occurred in Example 10 is measured. FIG. 23 shows a state in which a crack 92 has occurred in the bridge 91 in which the sensor terminal 1 is installed in various places. Here, it is assumed that sensor information measured by the sensor terminal 1 surrounded by a broken line needs to be acquired in order to investigate in detail the situation around the crack 92.

  The database server 4 transmits to the airship 5 a power supply request for supplying power to the sensor terminal 1 surrounded by a broken line. The airship 5 that has received the power supply request moves to the installation position of the corresponding sensor terminal 1 and supplies power to the sensor terminal 1. The powered sensor terminal 1 acquires sensor information by measurement by the sensor 13 and transmits the measurement result to the database server 4. At this time, the sensor terminal 1 may transmit the measurement result to the database server 4 through the relay terminal 2, or may transmit the measurement result to the airship 5.

In Example 10, the airship 5 may acquire the sensor information from each sensor terminal 1 and return to the standby place, and then collectively transmit the measurement results of each sensor terminal 1 to the database server 4.
(Example 11)

  In the first embodiment, the airship 5 merely supplies power to the sensor terminal 1 and does not perform measurement by the sensor itself. However, in the eleventh embodiment, the airship 5 has a sensor mounted in the same manner as the sensor terminal 1. The sensor information can be acquired by itself.

  FIG. 24 is a block diagram of the airship 5 according to the eleventh embodiment. Referring to FIG. 24, the airship 5 according to the eleventh embodiment has a configuration in which a sensor 5A and a sensor control unit 5B are added to the one shown in FIG.

  When the database server 4 determines that measurement by the sensor 5 </ b> A mounted on the airship 5 is necessary, the database server 4 transmits a measurement instruction including information on the measurement location to the airship 5. The measurement instruction includes position information indicating the measurement location. When the airship 5 has a plurality of types of sensors 5A, the measurement instruction includes information indicating the type of sensor used for measurement.

  As a judgment criterion for determining that measurement by the airship 5 is necessary, for example, when a failure of the sensor terminal 1 itself is suspected, or when information that cannot be measured by the sensor 13 mounted on the sensor terminal 1 is required. It is done.

  Upon receiving the measurement instruction, the airship 5 moves to the designated measurement location by the moving unit 56, performs measurement with the designated sensor 5A under the control of the sensor 5B, and stores the sensor information of the measurement result from the communication unit 51 to the database. Send to server 4.

  The database server 4 may transmit the measurement instruction to the airship 5 in a power supply request that requests the airship 5 to supply power to the sensor terminal 1. Further, the airship 5 may be capable of performing measurement by its own sensor 5 </ b> A as well as feeding power to the sensor terminal 1. In that case, the airship 5 performs power supply flight for supplying power to the sensor terminal 1, performs measurement with the sensor 5 </ b> A when reaching the designated measurement location, and continues the power supply flight after the measurement is completed. Examples of the sensor 5A mounted on the airship 5 include a camera, a temperature sensor, a humidity sensor, and an illuminance sensor.

  Each embodiment of the present invention described above is an example for explaining the present invention, and is not intended to limit the scope of the present invention to only the embodiment. Those skilled in the art can implement the present invention in various other modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Sensor terminal, 11 ... Communication part, 12 ... Sensor control part, 13 ... Sensor, 14 ... Power supply control part, 15 ... Power supply, 16 ... Power supplied part, 17 ... RFID, 2 ... Relay terminal, 21 ... Communication part, DESCRIPTION OF SYMBOLS 22 ... Data processing part, 3 ... Network, 4 ... Database server, 41 ... Communication part, 42 ... Data control part, 43 ... Time management part, 44 ... Power feeding area database, 45 ... Terminal information database, 5 ... Mobile body (Airship 51 ... Communication unit, 52 ... GPS, 53 ... Power supply target sensor terminal information holding unit, 54 ... Power supply unit, 55 ... RFID detection unit, 56 ... Moving unit, 57 ... Flight route determination unit, 58 ... Power supply control unit, 59 ... Power supply, 5A ... Sensor, 5B ... Sensor control unit, 6 ... Controller, 61 ... Communication unit, 62 ... Power feeding instruction unit, 63 ... Moving direction instruction unit, 64 ... Screen display unit, 91 ... Bridge, 92 ... Crack

Claims (10)

A sensor network system that collects information measured by sensors using a server.
A sensor terminal that has a power supply device and a sensor, operates with power supplied from the power supply device, and transmits sensor information measured by the sensor;
A server for acquiring and recording the sensor information transmitted from the sensor terminal;
The move to the installation site of the sensor terminal, have a, a moving body for moving the feed supplying charging power to the power supply of the sensor terminal,
The moving body has a sensor,
When the server determines that measurement by the sensor of the mobile body is necessary, the server transmits a measurement instruction including information on a measurement location to the mobile body,
Upon receipt of the measurement instruction, the mobile body moves to the measurement location, performs measurement by the sensor, and transmits a measurement result to the server.
Sensor network system.   The sensor network system according to claim 1, wherein the server determines that measurement by the sensor of the mobile terminal is necessary when there is a possibility that the sensor terminal is out of order.   The sensor network system according to claim 1, wherein the server determines that measurement by a sensor of the mobile terminal is necessary when information that cannot be measured by the sensor terminal is necessary. The sensor terminal further transmits battery remaining amount information indicating a remaining battery amount of the power supply device,
The server acquires the battery remaining amount information from the sensor terminal, determines whether or not the sensor terminal needs to be charged based on the battery remaining amount information, and sends a power supply request designating a sensor terminal to be powered. Send
The mobile unit obtains the power supply request from the server, moves to an installation location of the sensor terminal specified by the power supply request, and supplies charging power to the power supply device of the sensor terminal. Sensor network system as described in.   The server transmits the measurement instruction included in the power supply request.
The sensor network system according to claim 4.   The mobile body performs measurement by its own sensor together with power feeding to the sensor terminal.
The sensor network system according to claim 4.   The sensor network system according to claim 4, wherein the mobile body performs measurement by its own sensor during the movement for supplying charging power to the sensor terminal. 7,   The sensor network system according to claim 1, wherein the moving body is an airship. A sensor terminal having a power supply device and a sensor, operating with power supplied from the power supply device, transmitting sensor information measured by the sensor, and acquiring and recording the sensor information transmitted from the sensor terminal In a sensor network system having a server, a mobile body for supplying charging power to the power supply device of the sensor terminal,
A moving unit that drives the device to move to the installation location of the sensor terminal;
A power supply unit for supplying charging power to the power supply device of the sensor terminal;
A sensor,
A sensor control unit for controlling measurement by the sensor;
I have a,
Upon receiving from the server a measurement instruction including information on a measurement location that is transmitted when it is determined that measurement by the sensor of the mobile body is necessary, the server moves to the measurement location and performs measurement by the sensor Sending the result to the server;
Moving body. A sensor terminal having a power supply device and a sensor, operating with power supplied from the power supply device, transmitting sensor information measured by the sensor, and acquiring and recording the sensor information transmitted from the sensor terminal And a sensor network power supply method for supplying charging power to the power supply device of the sensor terminal in a sensor network system having a server,
Move to the installation location of the sensor terminal,
Supply charging power to the power supply device of the sensor terminal ,
Move to a measurement location where measurement by the sensor of the moving body is necessary,
Measure with the sensor of the moving body,
Sending measurement results to the server;
Sensor terminal power supply method.

Images