JPWO2018207266A1 - Wireless sensor central station, wireless sensor device, server device, wireless sensor system, and wireless sensor control method - Google Patents

Abstract

A wireless sensor intensive station that centrally controls a plurality of wireless sensor devices that perform event detection based on collected environmental information, and determines the determination threshold by comparing and evaluating the event detection conditions of the wireless sensor device and the received environmental information. An event detection condition control unit that determines whether the user is satisfied and a wireless sensor device having an associated event detection condition are selected by referring to the database, and an event detection condition associated with the selected wireless sensor device And a wireless sensor selection unit for setting.

Description

  The present invention provides a wireless sensor central station for realizing a function of changing the operation of another wireless sensor related to a plurality of wireless sensors installed geographically based on the environmental information of a specific wireless sensor. , Wireless sensor device, server device, wireless sensor system, and wireless sensor control method.

  In recent years, it has led to danger prediction by collecting environmental information from various sensors that measure acceleration, temperature, water content, etc., damage caused by deterioration of social infrastructure such as roads, bridges, tunnels, water and sewage, and natural disasters. A system that achieves early detection of events is expected.

  However, there are many cases in which it is difficult to supply power due to restrictions on the installation location of the sensor. Furthermore, in order to realize long-term operation of the sensor, it is necessary to take measures such as reducing the frequency of information collection as well as reducing the power consumption of the device. However, on the network side, there is a problem that the accuracy of environmental information decreases because the frequency of information collection decreases.

  Further, in order to detect an event leading to a risk prediction, it is effective to link not only with environmental information collected from a plurality of sensors but also with environmental information of geographically different places. Thus, in order to improve the accuracy of environmental information, in addition to the accuracy of environmental information collected from sensors, it is also necessary to link related sensors installed at different locations.

  As a method for solving such a problem, there is the following prior art (see, for example, Patent Document 1). Patent document 1 determines event generation according to the output value of a part of several sensor mounted in a sensor system. Further, Patent Document 1 discloses a technique for achieving power saving by making it possible to change settings of other sensors necessary for determining the occurrence of a related event.

  On the other hand, there is also the following prior art (see, for example, Patent Document 2). Patent Document 2 acquires state quantities of events occurring around a living body or a living body from a plurality of sensors attached to the living body. Patent Document 2 discloses a technique for saving power by starting measurement of state quantities of other sensors when the acquired state quantities satisfy the condition.

Japanese Patent Application No. 2015-048747 Patent 4575133 gazette

However, the prior art has the following problems.
If the technology disclosed in Patent Document 1 is in a sensor system including a plurality of sensor groups and one communication function unit, detection of linked event occurrence and power saving are possible. However, Patent Document 1 has a problem that it does not contribute to the linkage between sensors between sensor systems installed at different places.

  In addition, the technology disclosed in Patent Document 2 is effective in power saving by starting measurement of the state quantities of different sensors in stages with changes in the state quantities measured by the sensors. However, Patent Document 2 has a problem in that it does not contribute to control of the measurement method of the state quantity between the linked sensors.

  The present invention has been made in view of the above problems, and in a wide range of wireless sensor networks, a wireless that can achieve both improvement in accuracy of environmental information on the network side necessary for risk prediction and power saving. An object of the present invention is to obtain a sensor central station, a wireless sensor device, a server device, a wireless sensor system, and a wireless sensor control method.

  The wireless sensor concentration station according to the present invention collects environmental information at each installation location through sensors, and installs them at geographically different locations so as to detect an event corresponding to an abnormality in environmental information or a change in environmental information. Wireless sensor integrated station that centrally controls the plurality of wireless sensor devices, receives environmental information from each of the plurality of wireless sensor devices, and receives an event detection condition of each wireless sensor device stored in the database; The event detection condition control unit determines whether the determination threshold value which is one parameter included in the event detection condition is satisfied or not by comparing and evaluating the environmental information, and the received environment information is the event detection condition control unit When it is judged that the judgment threshold is satisfied by the event, the related event detection condition is referred to by referring to the database. And selecting a wireless sensor device to be linked as a linked wireless sensor device, and setting a related event detection condition to the linked wireless sensor device, and configuring a wireless sensor network According to the environmental information received from a certain wireless sensor device, the update processing of the event detection condition of the wireless sensor device linked is performed.

  The wireless sensor device according to the present invention is a wireless sensor device that performs mutual communication with the wireless sensor central station according to the present invention, and a memory for storing its own event detection condition and environment information acquired from the sensor are stored in the memory. When the determination threshold which is one parameter included in the stored event detection condition is satisfied, it is determined that the event has occurred, and the environment information is transmitted to the wireless sensor intensive station through the communication unit. It has an event detection unit, and an event detection condition update unit that updates its own event detection condition stored in the memory by receiving an event detection condition to be updated from the wireless sensor intensive station.

  The server apparatus according to the present invention is installed at geographically different places so as to collect environmental information at each installation place via sensors, and to perform event detection corresponding to abnormality of environmental information or change of environmental information. A server device connected via a wide area wireless communication network to a wireless sensor network including a plurality of wireless sensor devices and a wireless sensor central station that integrally controls the plurality of wireless sensor devices, which is a plurality of wireless sensor devices A monitoring function unit that receives environment information collected by each via a wireless sensor central station and a wide area wireless communication network and stores it in a storage device, and inputs, sets, updates, and deletes event detection conditions of multiple wireless sensor devices And an input unit for processing the operation, wherein the monitoring function unit analyzes the environment information stored in the storage device based on the input operation accepted by the input unit. When it is determined whether the event detection condition of each wireless sensor device needs updating and the event detection condition is updated, a request for setting the event detection condition is sent to the wireless sensor intensive station, and the wireless sensor intensive station By communicating with each wireless sensor device, it is possible to update the event detection condition of the desired wireless sensor device.

  The wireless sensor system according to the present invention is installed at geographically different places so as to collect environmental information at each installation place via sensors and to detect an event corresponding to an abnormality of the environmental information or a change of the environmental information. Unit wireless sensor network configuration including a plurality of wireless sensor devices and a wireless sensor intensive station performing mutual communication with the plurality of wireless sensor devices is connected to the wide area network and the wireless sensor network connected to the wide area network; A wireless sensor system comprising: all wireless sensor devices included in the wireless sensor network; and a control device that centrally controls the wireless sensor central station, the control device including the wireless sensor central station included in the wireless sensor network Of a plurality of wireless sensor devices that communicate with the wireless sensor central station via Environmental information is received from each, and the evaluation threshold of the one parameter included in the event detection condition is satisfied by comparing and evaluating the event detection condition of each wireless sensor device stored in the database and the received environmental information. If the event detection condition control unit determines that the event detection condition control unit determines whether or not the received environment information satisfies the determination threshold, wireless communication is performed by referring to the database. Among all the wireless sensor devices included in the sensor system, another wireless sensor device having an associated event detection condition is selected as a linked wireless sensor device, and the associated event detection condition to the linked wireless sensor device And a wireless sensor selection unit for enabling setting of the wireless sensor system, and receiving from a wireless sensor device configuring the wireless sensor system Depending on the environmental information, and executes the update processing of the event detection conditions of the wireless sensor device cooperating in the wireless sensor system.

  The wireless sensor control method according to the present invention collects environmental information at each installation location through sensors, and installs the sensors at geographically different locations so as to detect an event corresponding to an abnormality in environmental information or a change in environmental information. A wireless sensor control method implemented in a wireless sensor network configured to include a plurality of wireless sensor devices and a wireless sensor central station that integrally controls the plurality of wireless sensor devices, the wireless sensor device comprising: In each of the steps, an information collecting step of collecting environmental information and transferring the collected environmental information to the wireless sensor concentration station, and a detecting step of detecting an event based on the environmental information collected by the information collecting step Receiving step of receiving environmental information from each of a plurality of wireless sensor devices at the wireless sensor central station By comparing and evaluating the event detection condition of each wireless sensor device stored in the database with the received environment information, it is determined whether or not the determination threshold which is one parameter included in the event detection condition is satisfied. When it is determined that the event detection step and the received environment information satisfy the determination threshold in the event detection step, another wireless sensor device having an associated event detection condition by referring to the database Selecting as the wireless sensor device to be linked, and transferring a request command to set an associated event detection condition to the wireless sensor device to be linked, and in each of the plurality of wireless sensor devices, the wireless When a request command is received from the sensor central station, the relevant event detection condition Those having an update step of executing the update processing of the event detection conditions.

  According to the present invention, it is possible to change the operation of another related wireless sensor based on the environmental information of a specific wireless sensor device among a plurality of wireless sensor devices installed geographically and distributed. Have. As a result, in a wide range of wireless sensor networks, a wireless sensor central station, a wireless sensor device, a server device, and a wireless sensor capable of achieving both improvement in accuracy of environmental information on the network side necessary for risk prediction etc. A system and wireless sensor control method can be obtained.

It is a figure which shows the structural example of the radio | wireless sensor system comprised including the radio | wireless sensor apparatus and radio | wireless sensor intensive station which concern on Embodiment 1 of this invention. It is a block diagram which shows the structural example of the radio | wireless sensor apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structural example of the wireless sensor intensive station which concerns on Embodiment 1 of this invention. It is a figure which shows the information structural example of the event detection conditions stored in the database which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the numbering prescription | regulation of wireless device ID contained in the event detection conditions which concern on Embodiment 1 of this invention. It is a block diagram which shows the structural example of the server apparatus which concerns on Embodiment 1 of this invention. It is a figure showing an example of composition of a server apparatus concerning Embodiment 1 of the present invention. It is a sequence diagram which shows an example of the measurement processing procedure of environmental information by the wireless sensor device which concerns on Embodiment 1 of this invention, and the information transmission processing procedure to a server apparatus. It is a flowchart which shows an example of the event detection determination processing of the radio | wireless sensor apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which illustrated the state transition of the radio | wireless sensor apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of measurement operation | movement and radio | wireless transmission operation | movement of the environment information in the radio | wireless sensor apparatus which concern on Embodiment 1 of this invention. It is a sequence diagram which shows an example of the update procedure of the event detection conditions of the radio | wireless sensor apparatus which concerns on Embodiment 1 of this invention. It is a sequence diagram which shows an example of the update procedure of the event detection conditions performed in cooperation between the radio | wireless sensor apparatuses installed in the geographically different place which concerns on Embodiment 1 of this invention. It is a figure which shows the example of an event detection condition update of the radio | wireless sensor apparatus which concerns on Embodiment 1 of this invention, and is the figure which showed the example of an event setting before the update of an event detection condition. It is a figure which shows the example of an event detection condition update of the radio | wireless sensor apparatus which concerns on Embodiment 1 of this invention, and is the figure which showed the example of an event setting after the update of an event detection condition. It is a figure which shows the structural example of the event detection conditions relevant to the radio | wireless sensor apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structural example of the radio | wireless sensor system comprised including the radio | wireless sensor apparatus and radio | wireless sensor intensive station which concern on Embodiment 2 of this invention. It is a block diagram which shows the structural example of the control apparatus which concerns on Embodiment 2 of this invention.

  Hereinafter, a wireless sensor intensive station, a wireless sensor device, a server device, a wireless sensor system, and a wireless sensor control method according to an embodiment of the present invention will be described in detail based on the drawings. In the following description, although a specific low power wireless network such as a wireless smart utility network (Wi-SUN) using a 920 MHz band as a wireless sensor network is described, the present invention is not limited to this.

Embodiment 1
FIG. 1 is a diagram showing a configuration example of a wireless sensor system configured to include a wireless sensor device and a wireless sensor central station according to Embodiment 1 of the present invention. In the wireless sensor network 40, wireless sensor devices 10a, 10b, and 10c for acquiring surrounding environment information by sensors or the like are arranged in monitoring areas 20a, 20b, and 20c to be monitored. The wireless sensor devices 10a, 10b, and 10c transmit the acquired environment information to the wireless sensor central station 11 via the sensor wireless signals 12a, 12b, and 12c.

  The wireless sensor central station 11 transfers the environment information acquired by the wireless sensor devices 10a, 10b and 10c to the portable base station 30 via the wireless signal 34 by wide-area wireless communication means such as a mobile phone. The environment information is transferred from the mobile base station 30 to the wide area network 31 and stored in the server device 32.

  In the following description, when the wireless sensor devices 10a, 10b, and 10c are not distinguished, they may be referred to as the wireless sensor device 10. Similarly, when the monitoring areas 20a, 20b, and 20c are not distinguished, they may be referred to as monitoring area 20, and when the sensor wireless signals 12a, 12b, and 12c are not distinguished, they may be referred to as sensor wireless signals 12.

  The wireless sensor central station 11 is a host device capable of wireless communication with the plurality of wireless sensor devices 10. The wireless sensor central station 11 also has a wireless communication means with the wide area wireless communication network 41. Specifically, the wireless sensor central station 11 transmits the information on the wireless sensor network 40 composed of the monitoring area 20 to the wide area wireless communication network 41 composed of the portable base station 30, the wide area network 31 and the server device 32. It has a forwarding function for relaying.

  As wireless communication means with the wide area wireless communication network 41 which the wireless sensor central station 11 has, there are W-CDMA (Wideband-Code Division Multiple Access), LTE (Long Term Evolution), etc. which are used in mobile phones.

  The portable base station 30 is a device that aggregates a plurality of portable terminals in the wide area wireless communication network 41. In the first embodiment, the function of the portable terminal is installed in the wireless sensor central station 11. Then, with this function, the wireless sensor central station 11 performs processing such as wireless channel control with the mobile base station 30, security, and the like. The mobile base station 30 also has a function as a relay device that relays communication between the wireless sensor central station 11 and the server device 32.

  The portable base station 30 and the server device 32 are connected by a wide area network 31 mainly composed of a wired line. The wide area network 31 configures an IP (Internet Protocol) network using a plurality of routers, optical circuits, and the like.

  Hereinafter, in communication via the wide area network 31, an example in which IP is used as a communication protocol will be described. However, the communication protocol that can be used for communication via the wide area network 31 is not limited to this.

  The server device 32 is a device that stores environmental information acquired by the wireless sensor device 10. The server device 32 has a function of detecting an event leading to a risk prediction using environmental information collected from various sensors, a function of setting information on the operation of the wireless sensor device 10 and the wireless sensor central station 11, and monitoring of the device state It has a function of collecting information and a function of displaying acquired environment information.

  In addition, although the server apparatus 32 should just deploy one apparatus to the wireless sensor network 40, it is not limited to this. The server apparatus 32 may be installed at a different site according to the redundancy by the load distribution of the server apparatus 32 or according to the purpose to be monitored.

  FIG. 2 is a block diagram showing a configuration example of the wireless sensor device 10 according to Embodiment 1 of the present invention. In the wireless sensor device 10, the communication unit 100 includes a wireless IF (Interface) function that performs transmission and reception processing of the sensor wireless signal 12, and a modem function that performs control for wireless connection with the wireless sensor central station 11. An antenna unit (hereinafter, referred to as ANT (Antenna) unit) 101 transmits and receives radio waves of the sensor wireless signal 12 with the wireless sensor intensive station 11.

  The sensing unit 102 performs setting and control of a sensor 103 having a function of measuring environmental information such as acceleration and moisture in the soil. Then, the sensing unit 102 acquires the environmental information measured by the sensor 103.

  The memory 104 stores setting information such as wireless parameters for the wireless sensor device 10 to operate. Then, this wireless parameter is read out when the wireless sensor device 10 is activated. The memory 104 is also used when the sensing unit 102 temporarily stores the environmental information acquired from the sensor 103.

  The event detection unit 105 uses the event detection conditions stored in the memory 104 to evaluate the environmental information measured by the sensing unit 102. Then, when the event detection condition is satisfied, the event detection unit 105 determines that an event has occurred.

  The event detection condition update unit 106 communicates the event detection condition used by the event detection unit 105 with the wireless sensor intensive station 11 when the wireless sensor intensive station 11 or the server device 32 determines that the event detection condition is updated. , And stored in the memory 104.

  The battery 107 has a function of supplying power to each component in the wireless sensor device 10. The battery 107 can also supply power in conjunction with sunlight or a power generation device at the time of a power failure.

  FIG. 3 is a block diagram showing a configuration example of the wireless sensor central station 11 according to Embodiment 1 of the present invention. In the wireless sensor central station 11, the communication unit 200 includes a wireless IF function that performs transmission and reception processing of the sensor wireless signal 12, and a modem function that performs control for wireless connection with the wireless sensor device 10. The ANT unit 201 transmits and receives radio waves of the sensor wireless signal 12 to and from the wireless sensor device 10.

  The wide area network interface unit 202 has a wireless communication means for communicating with a wide area wireless communication network 41 such as a cellular phone network. Then, the wide area network interface unit 202 has a transfer function for relaying the environment information received from the wireless sensor device 10 to the wide area wireless communication network 41.

  The ANT unit 203 transmits and receives radio waves of the wireless signal 34 to and from the portable base station 30 of the wide area wireless communication network 41.

  The event detection condition control unit 204 has a function of setting, updating, and deleting information related to the event detection condition stored in the memory 104 of the wireless sensor device 10. The wireless sensor device 10 for which the event detection condition is to be updated is determined by the wireless sensor selection unit 205.

  The database 206 stores setting information such as a list of the wireless sensor devices 10 managed by the wireless sensor central station 11 and associated event detection conditions, wireless parameters for operating the wireless sensor central station 11, and the like.

  FIG. 4 is a diagram showing an information configuration example of event detection conditions stored in the database 206 according to the first embodiment of the present invention. As the event detection condition, the wireless device ID, the number of registered events, and the sensor type are registered for each wireless sensor device 10 accommodated by the wireless sensor central station 11, and the event setting is defined according to the number of registered events and the sensor type doing. In this example, although an inclinometer, a soil moisture meter, and a thermometer are shown as a sensor type, a sensor type is not limited to this. Further, in this example, an example of the measurement interval of the sensor and the wireless transmission interval is shown as the event processing, but the present invention is not limited to this, and the number of times of acquisition of environmental information by the sensor may be used.

  FIG. 5 is a diagram showing an example of the rule of numbering of wireless device IDs included in the event detection condition according to the first embodiment of the present invention. In this example, the wireless device ID is configured by hexadecimal four digits.

  The highest digit A indicates the type of the sensor 103 connected to the wireless sensor device 10, the two-digit number BC indicates an identifier unique to the wireless device, and the lowest digit D indicates the wireless sensor device 10 It is an event setting sub-number indicating a list of settable event detection conditions.

  In the event setting, a determination threshold for performing event detection, a measurement interval of environment information from the sensor 103 in the event setting, and a wireless transmission interval for transmitting the environment information to the wide area wireless communication network 41 are set. Among the event detection conditions held by the wireless sensor aggregation station 11, only the event detection conditions related to the own device are stored in the memory 104 of the wireless sensor device 10.

  The power supply unit 207 has a function of supplying power to each component in the wireless sensor concentration station 11. The power supply unit 207 can also supply power in conjunction with sunlight or a power generation device at the time of a power failure.

  In the first embodiment, an example of the configuration in which the wide area network interface unit 202 is built in the wireless sensor central station 11 has been shown. However, the wide area network interface function may be connected to the outside of the wireless sensor central station 11. The wireless device ID numbering rule is not limited to that illustrated in FIG. 5, and the number of digits of the identifier and the meaning assigned to each digit can be flexibly changed.

  FIG. 6 is a block diagram showing a configuration example of the server apparatus 32 according to Embodiment 1 of the present invention. In the server device 32, the wired IF (Interface) unit 300 is connected to the wide area wireless communication network 41 configured of the portable base station 30 and the wide area network 31.

  The monitoring function unit 301 collects and manages environmental information received from the plurality of wireless sensor devices 10. The monitoring function unit 301 is a function unit that sets, updates, and deletes event detection conditions of the wireless sensor device 10.

  The display unit 302 displays environmental information of the wireless sensor device 10 managed by the monitoring function unit 301. The input unit 303 also provides an input interface for setting, updating, and deleting an event detection condition of the wireless sensor device 10.

  The storage device 304 stores internal information necessary for the operation of the server device 32, environment information of the wireless sensor device 10 managed by the monitoring function unit 301, and control information such as an event detection condition. The power supply unit 305 supplies power to each component of the server device 32.

  FIG. 7 is a diagram showing a configuration example of the server apparatus 32 according to Embodiment 1 of the present invention. When the monitoring function unit 301 of the server device 32 is realized by a control circuit including a CPU, this control circuit is configured as, for example, a control circuit 400 configured as shown in FIG.

  When the monitoring function unit 301 has the configuration of the control circuit 400 shown in FIG. 7, the processor 401 reads out and executes a program corresponding to the processing of the monitoring function unit 301 stored in the memory 402 to execute the monitoring function. The function of unit 301 is realized. The memory 402 is also used as a temporary memory in each process performed by the processor 401.

  Subsequently, after the device is started, the wireless sensor device 10 and the wireless sensor central station 11 are wirelessly connected, and the wireless sensor central station 11 receives the environment information measured by the wireless sensor device 10 via the wide area wireless communication network 41 The procedure for storing in 32 will be described. FIG. 8 is a sequence diagram showing an example of a measurement processing procedure of environmental information and an information transmission processing procedure to the server device 32 by the wireless sensor device 10 according to the first embodiment of the present invention.

  When the device activation of the wireless sensor central station 11 is performed, the wireless sensor central station 11 reads setting information necessary for starting a service, such as a wireless parameter, from the database 206 (ST100). The communication unit 200 of the wireless sensor concentration station 11 starts transmission of the sensor wireless signal 12 via the ANT 201 using wireless parameters such as a frequency band and channel information to be used.

  In addition, the wireless sensor device 10 reads the wireless parameter setting information from the memory 104 after the device is activated (ST101). Then, based on the acquired event determination condition of the wireless sensor device 10, the sensing unit 102 sets the sensor 103 connected to the wireless sensor device 10 (ST102).

  Furthermore, after the device is activated, the wireless sensor device 10 searches for the wireless sensor intensive station 11 that transmits the environment information acquired from the sensor 103, and sets the wireless communication path via the sensor wireless signal 12 (ST103).

  On the other hand, the wide area network interface unit 202 of the wireless sensor central station 11 connects with the portable base station 30 via the wireless signal 34 in order to connect with the wide area wireless communication network 41 using the wide area wireless communication means (ST104) ).

  After establishing a communication path with the portable base station 30 and the wireless signal 34, the wireless sensor central station 11 performs location registration and packet connection to the wide area wireless communication network 41, and can communicate with the server device 32 (ST105) . After the procedures of ST103 to ST105 are completed, each communication path is established, and the service by the wireless sensor network 40 is started.

  The sensing unit 102 of the wireless sensor device 10 acquires environmental information from the sensor 103 at measurement intervals of the event detection condition acquired from the memory 104 (ST106). Here, among the event detection conditions of FIG. 4, the setting of the wireless device # 1 will be described on the premise.

  The sensor 103 that has received the acquisition request for the environmental information from the sensing unit 102 measures the environmental information, and sends the measurement result to the sensing unit 102 (ST 107).

  After storing the environment information in the memory 104, the sensing unit 102 that has acquired the environment information from the sensor 103 evaluates the environment information and the determination threshold of the event detection condition, and selects the corresponding event setting (ST108).

  In the event determination processing, when there is no change in the event setting, the sensing unit 102 schedules the next acquisition of environmental information based on the same event setting. Also, when the event setting is changed, the sensing unit 102 starts acquiring the next environment information using the new event setting (ST109).

  When the sensing unit 102 reaches the wireless transmission interval of the event detection condition, the sensing unit 102 starts a process of transmitting the environment information acquired from the sensor 103 to the server device 32 (ST110). If there are a plurality of environmental information measured within the wireless transmission interval, the sensing unit 102 may multiplex the environmental information and transmit it to the wireless sensor aggregation station 11.

  The event detection condition control unit 204 of the wireless sensor concentration station 11 that has received the environment information from the wireless sensor device 10 evaluates the environment information and the event detection condition. Then, after confirming the presence or absence of the related wireless device corresponding to the event setting of the wireless sensor device 10, the event detection condition control unit 204 relays the environment information to the portable base station 30 via the wide area network interface unit 202.

  The portable base station 30 transfers the received environment information to the server device 32 via the wide area network 31 (ST 111). The server device 32 stores the received environment information in the storage device 304 (ST112). Thereafter, acquisition processing of environmental information by the sensing unit 102 of the wireless sensor device 10 and transmission processing of the environmental information to the server device 32 are repeatedly performed (ST113).

  According to this procedure, the server device 32 can acquire environmental information from the plurality of wireless sensor devices 10 in the wireless sensor network 40. As a result, the server apparatus 32 can carry out an evaluation for the purpose of grasping the state of the social infrastructure, risk prediction and the like.

  FIG. 9 is a flowchart showing an example of an event detection determination process of the wireless sensor device 10 according to Embodiment 1 of the present invention. The operation of the event detection determination process of the wireless sensor device 10 will be described using the example of the wireless device # 2 among the event detection conditions of FIG. 4 described above.

  In the wireless device # 2, three event detection conditions are registered as the event setting, and the initial state is set as the event setting # 1.

  The sensor type is an inclinometer, and the environmental information measured by the sensor 103 is acceleration information. The sensing unit 102 of the wireless sensor device 10 determines whether a cycle for acquiring acceleration information, which is environmental information, from the sensor 103 has been reached (S100). When the acquisition period of the environmental information has been reached, the sensing unit 102 acquires the environmental information from the sensor 103 (S101).

  The sensing unit 102 verifies whether there are a plurality of event registration numbers registered in the event detection condition (S102). Then, when there is a plurality of event registration numbers, the sensing unit 102 collates with the determination threshold (S103).

  FIG. 10 is an explanatory view exemplifying the state transition 500 of the wireless sensor device 10 according to the first embodiment of the present invention. Each event setting corresponds to each state transition as shown in FIG. Here, the state A501 corresponds to the event setting # 1 of the wireless device # 2, the state B502 corresponds to the event setting # 2 of the wireless device # 2, and the state C503 corresponds to the event setting # 3 of the wireless device # 2.

  That is, when the wireless sensor device 10 is in the state A501, the event detection unit 105 performs the event processing from the state A501 to the state B502 when the acceleration acquired from the sensor 103 satisfies the condition of the determination threshold # 2 of event setting # 2. A parameter is set to the sensing unit 102 (S104, S105).

  FIG. 11 is a diagram showing an example of an operation of measuring environmental information and a wireless transmission operation in the wireless sensor device 10 according to Embodiment 1 of the present invention. The wireless sensor device 10 periodically performs the wireless transmission operation 600 and the measurement operation 601 based on the event processing parameter of each state transition 500. At this time, the wireless transmission operation 600 of the wireless sensor device 10 consumes more power than the case where only the measurement operation 601 is performed.

  In the state transition operation in the first embodiment, the method of changing each state in stages is described, but the present invention is not limited to this.

  FIG. 12 is a sequence diagram showing an example of the procedure for updating the event detection condition of the wireless sensor device 10 according to Embodiment 1 of the present invention. The wireless sensor device 10 periodically transmits the environment information acquired from the sensor 103 to the server device 32, and it is assumed that the social infrastructure monitoring service by the wireless sensor network 40 is in operation (ST200).

  When the server device 32 determines the update of the event detection condition of the wireless sensor device 10 based on the analysis result of the environment information stored in the storage device 304, the server device 32 receives the event detection condition from the input unit 303 of the server device 32. The event detection condition stored in the storage device 304 is updated by inputting the parameter to be changed (ST201).

  Next, the server device 32 requests the wireless sensor central station 11 to set an event detection condition (ST202). The wireless sensor concentration station 11 that has received the event detection condition setting request from the server device 32 updates the event detection condition of the database 206 (ST203).

  On the other hand, the sensing unit 102 of the wireless sensor device 10 acquires environmental information from the sensor 103 at measurement intervals of the event detection condition acquired from the memory 104. After storing the environmental information in the memory 104, the sensing unit 102 that has acquired the environmental information from the sensor 103 evaluates the environmental information and the determination threshold of the event detection condition (ST 204).

  When the wireless sensor device 10 reaches the wireless transmission interval of the event detection condition, the wireless sensor device 10 starts a process of transmitting the environment information acquired from the sensor 103 to the server device 32 (ST205). Is sent (ST206).

  The event detection condition control unit 204 of the wireless sensor concentration station 11 having received the environment information from the wireless sensor device 10 checks whether the event detection condition of the wireless sensor device 10 stored in the database 206 is updated (ST 207). When the event detection condition control unit 204 detects an update, the event detection condition control unit 204 transfers the event detection condition to the wireless sensor device 10 (ST208).

  The event detection condition update unit 106 of the wireless sensor device 10 that has received a new event detection condition from the wireless sensor concentration station 11 updates the content of the event detection condition stored in the memory 104, and the sensing unit 102 The setting is made (ST 209). The event processing parameters of the event detection condition changed by the server device 32 are reflected on the wireless sensor device 10 by the series of processes.

  After transmitting the event detection condition to the wireless sensor device 10 in ST208 described above, the wireless sensor central station 11 transfers the environment information to the server device 32 (ST210). The event detection condition update method described above executes an event detection condition update procedure triggered by transmission of environmental information from the wireless sensor device 10. Therefore, the power consumption of the wireless sensor device 10 can be reduced. However, the update procedure of the event detection condition is not limited to this, and the update procedure of the event detection condition may be started from the wireless sensor concentration station 11.

  Moreover, although the method to input from the server apparatus 32 was demonstrated as an update method of event detection conditions, it is not limited to this. A plurality of event detection conditions may be prepared in advance, and an update method may be adopted in which the event detection conditions to be updated are automatically selected from the evaluation results of the environment information acquired from the wireless sensor device 10. Further, the evaluation of the environment information may be performed by the wireless sensor central station 11.

  FIG. 13 is a sequence diagram showing an example of an update procedure of event detection conditions performed in cooperation between the wireless sensor devices 10 installed at geographically different places according to Embodiment 1 of the present invention. Here, a method will be described in which the wireless sensor concentration station 11 automatically executes the procedure for updating the event detection condition.

  Moreover, FIG. 14A and FIG. 14B are figures which show the example of an event detection condition update of the wireless sensor apparatus 10 which concerns on Embodiment 1 of this invention. Specifically, FIG. 14A is an example of setting an event before updating an event detection condition, and FIG. 14B is an example of setting an event after updating an event detection condition.

  The wireless sensor device 10a periodically acquires environment information at measurement intervals from the sensor 103a, and performs an event detection determination process (ST300). Furthermore, when the wireless transmission interval is reached, the wireless sensor device 10a transmits the measured environment information to the server device 32 (ST301, ST302).

  At this time, the event detection condition control unit 204 of the wireless sensor intensive station 11 receiving the environment information from the wireless sensor device 10a compares the event detection condition of the wireless sensor device 10a stored in the database 206 with the received environment information. Evaluate (ST 303).

  When the event detection condition control unit 204 determines that the wireless sensor device 10a satisfies the determination threshold # 2 shown in FIG. 14A as a result of the event detection condition evaluation, the wireless sensor selection unit 205 of the wireless sensor intensive station 11 The presence or absence of the related wireless device ID in the said state is confirmed, and wireless device ID of the wireless sensor apparatus 10b is acquired as related wireless device ID (ST304, ST305).

  FIG. 15 is a diagram showing a configuration example of an event detection condition related to the wireless sensor device according to Embodiment 1 of the present invention. The related wireless device ID selected by the wireless sensor selection unit 205 of the wireless sensor central station 11 and the wireless device ID of the wireless sensor device 10 b are different. However, as shown in FIG. 15, one wireless device ID can define a plurality of event detection conditions.

  Therefore, the event detection condition control unit 204 of the wireless sensor central station 11 can select a specific event detection condition from the event detection condition list by the event setting subnumber which is the lowest digit of the related wireless device ID. The event detection condition control unit 204 performs a process of setting the event detection condition of the wireless sensor device 10b selected from the related wireless device ID in the wireless sensor device 10b (ST306).

  Here, although the update process of the event detection condition is started from the wireless sensor intensive station 11, it is not limited to this. Further, the wireless sensor device 10 b may update the timing when the environmental information is transmitted to the wireless sensor central station 11.

  When receiving a new event detection condition received from the wireless sensor central station 11, the event detection condition updating unit 106 of the wireless sensor device 10b updates the event detection condition stored in the memory 104, and detects the parameter of the event detection condition It is set to 102 (ST 307).

  FIG. 14B shows the setting after updating the event detection condition of the wireless sensor device 10b. The measurement accuracy can be improved by updating the number of event registrations, the measurement interval, and the wireless transmission interval. The sensing unit 102 performs environmental information acquisition from the sensor 103b and event detection determination processing using the updated event detection condition (ST308).

  When the wireless sensor device 10b reaches the wireless transmission interval of the updated event detection condition, the wireless sensor device 10b starts processing to transmit the environment information acquired from the sensor 103b to the server device 32 (ST309), and the wireless sensor intensive station The environment information is sent to T.11 (ST310).

  The server device 32 that has received the environmental information from the wireless sensor device 10b checks the status of the monitoring area 20 with high accuracy from the environmental information received from the wireless sensor device 10a and the environmental information received from the wireless sensor device 10b. Is possible (ST 311).

  In FIG. 13, the procedure of updating the linked event detection condition between two wireless sensor devices installed at geographically different places has been described. As in the wireless sensor device 10 c of FIG. 14, it is possible to flexibly select the wireless sensor device 10 to be linked by setting a plurality of wireless device IDs in the related wireless device ID of the wireless sensor device 10 a.

  The related wireless device selection method is not limited to the method described above. For example, the related wireless device may be determined from the positional relationship of the installation location, or the relevancy may be designed from the sensor type and the position information of the wireless sensor device based on the past measurement information. There is no particular stipulation regarding the selection method of the related wireless device in the form of.

  As described above, according to the first embodiment, the wireless sensor device, the wireless sensor central station, and the server device have the function of updating the measurement accuracy for collecting environmental information and the wireless transmission interval, and other related wireless signals. And a function of selecting a sensor device.

  With such a configuration, it is possible to change the operation of another related wireless sensor device based on the environmental information of a specific wireless sensor device among a plurality of wireless sensors distributed in a geographically distributed manner. . As a result, in a wide range of wireless sensor networks, it is possible to obtain wireless sensor systems and devices capable of achieving both improvement in accuracy of environmental information required for hazard prediction and the like and power saving.

Second Embodiment
FIG. 16 is a diagram showing a configuration example of a wireless sensor system configured to include the wireless sensor device 10 and the wireless sensor central station 11 according to Embodiment 2 of the present invention. The wireless sensor network 40 'according to the second embodiment includes the functional units of the event detection condition control unit 204 and the wireless sensor selection unit 205 of the wireless sensor intensive station 11 of the wireless sensor network 40 according to the first embodiment over a wide area network. The wireless sensor network 40 is the same as the wireless sensor network 40 of the first embodiment except that it is provided on the control device 35 installed at 31.

  The components having the same functions as those of the first embodiment are given the same reference numerals as those of the first embodiment, and the redundant description will be omitted. Hereinafter, differences from the first embodiment will be mainly described.

  FIG. 17 is a block diagram showing a configuration example of a control device 35 according to Embodiment 2 of the present invention. In the control device 35, the wired IF (Interface) unit 800 performs IP communication on the wide area network 31 and is connected to the portable base stations 30 a and 30 c and the server device 32.

  The event detection condition control unit 801 has a function of setting, updating, and deleting information related to the event detection condition stored in the memory 104 of the wireless sensor device 10. Then, the wireless sensor device 10 for which the event detection condition is to be updated is determined by the wireless sensor selection unit 802. The database 803 stores a list of wireless sensor devices 10 and associated event detection conditions.

  The power supply unit 804 has a function of supplying power to each component of the control device 35. Since the control device 35 is disposed on the wide area wireless communication network 41, the wireless sensor devices 10a, 10b, and 10c connected to the plurality of wireless sensor central stations 11a, 11b, and 11c over a wider wireless sensor network are used. It becomes possible to make it link.

  As described above, according to the second embodiment, the wireless sensor device, the wireless sensor central station, the server device, and the control device are associated with the function of updating the measurement accuracy and the wireless transmission interval for collecting environmental information And a configuration for providing another wireless sensor device selecting function.

  With such a configuration, it is possible to change the operation of another related wireless sensor device based on the environmental information of a specific wireless sensor device among a plurality of wireless sensors distributed in a geographically distributed manner. . As a result, in a wide range of wireless sensor networks, it is possible to obtain wireless sensor systems and devices capable of achieving both improvement in accuracy of environmental information required for hazard prediction and the like and power saving.

  10a, 10b, 10c Wireless sensor device, 11, 11a, 11b, 11c Wireless sensor central station, 12a, 12b, 12c Sensor wireless signal, 20a, 20b, 20c Monitoring area, 30, 30a, 30c Mobile base station, 31 Wide area network , 32 server devices, 34, 34a, 34b, 34c wireless signals, 35 controllers, 40, 40 'wireless sensor networks, 41, 41' wide area wireless communication networks, 100, 200 communication units, 101, 201, 203 antenna units, 102 sensing unit, 103 sensor, 104 memory, 105 event detecting unit, 106 event detecting condition updating unit, 107 battery, 202 wide area network interface unit, 204, 801 event detecting condition control unit, 205, 802 wireless sensor selecting unit, 206, 803 data Base, 207, 305, 804 power supply unit, 301 monitoring function unit, 302 display unit, 303 input unit, 304 storage device, 400 control circuit, 401 processor, 402 memory,

Claims (5)

A plurality of wireless sensor devices installed at geographically different locations are collected to collect environmental information at each installation location via sensors, and to detect an event corresponding to an abnormality in the environmental information or a change in the environmental information. It is a wireless sensor central station that performs overall control,
The environment information is received from each of the plurality of wireless sensor devices, and the event detection condition is included in the event detection condition by comparing and evaluating the event detection condition of each wireless sensor device stored in the database and the received environmental information An event detection condition control unit that determines whether a determination threshold that is one parameter is satisfied;
When it is determined that the received environment information satisfies the determination threshold by the event detection condition control unit, another wireless sensor device having an associated event detection condition by referring to the database And a wireless sensor selection unit capable of setting the related event detection condition to the linked wireless sensor device, and configuring a wireless sensor network A wireless sensor intensive station that executes an update process of an event detection condition of the wireless sensor device to be linked according to the environmental information received from the server. A wireless sensor device for communicating with the wireless sensor central station according to claim 1;
A memory that stores its own event detection conditions,
When the environment information acquired from the sensor satisfies the determination threshold which is one parameter included in the event detection condition of its own stored in the memory, it is determined that an event has occurred and communication An event detection unit that transmits the environment information to the wireless sensor concentration station via the communication unit;
And an event detection condition updating unit configured to update the event detection condition of the own stored in the memory by receiving an event detection condition to be updated from the wireless sensor concentration station. A plurality of wireless sensor devices installed at geographically different places so as to collect environmental information at respective installation places via sensors and detect an event corresponding to an abnormality of the environmental information or a change of the environmental information A server device connected via a wide area wireless communication network to a wireless sensor network including a wireless sensor central station that integrally controls the plurality of wireless sensor devices,
A monitoring function unit that receives the environment information collected by each of the plurality of wireless sensor devices via the wireless sensor intensive station and the wide area wireless communication network, and stores the received information in a storage device;
And an input unit configured to process input operations of setting, updating, and deleting event detection conditions of the plurality of wireless sensor devices,
The monitoring function unit
Based on the input operation accepted by the input unit, the environment information stored in the storage device is analyzed to determine the necessity of updating the event detection condition of each wireless sensor device,
When updating of the event detection condition is determined, a request for setting the event detection condition is transmitted to the wireless sensor central station, and the wireless sensor central station is made to communicate with each wireless sensor device to obtain a desired wireless sensor Server device that enables updating the event detection condition of the device. A plurality of wireless sensor devices installed at geographically different places so as to collect environmental information at respective installation places via sensors and detect an event corresponding to an abnormality of the environmental information or a change of the environmental information ,
A wireless sensor network including a plurality of unit wireless sensor network configurations including a plurality of wireless sensor devices and a wireless sensor central station performing mutual communication with each other, the plurality of unit wireless sensor network configurations being connected to a wide area network;
A wireless sensor system comprising: a control device connected to the wide area network and integrally controlling all wireless sensor devices included in the wireless sensor network and a wireless sensor central station;
The controller is
Each of the wireless sensors stored in the database receives the environment information from each of a plurality of wireless sensor devices communicating with the wireless sensor central station via the wireless sensor central station included in the wireless sensor network An event detection condition control unit that determines whether a determination threshold that is one parameter included in the event detection condition is satisfied by comparing and evaluating an event detection condition of a device and the received environment information;
When it is determined that the received environment information satisfies the determination threshold by the event detection condition control unit, all the wireless sensor devices included in the wireless sensor system are referred to by referring to the database. Select another wireless sensor device having an associated event detection condition as a linked wireless sensor device, and select the wireless sensor device capable of setting the associated event detection condition to the linked wireless sensor device Wireless sensor system that executes an update process of an event detection condition of the linked wireless sensor device in the wireless sensor system according to the environmental information received from a certain wireless sensor device that configures the wireless sensor system. . A plurality of wireless sensor devices installed at geographically different places so as to collect environmental information at respective installation places via sensors and detect an event corresponding to an abnormality of the environmental information or a change of the environmental information A wireless sensor control method executed in a wireless sensor network configured to include a wireless sensor central station that integrally controls the plurality of wireless sensor devices,
In each of the plurality of wireless sensor devices,
An information collecting step of collecting the environmental information and transferring the collected environmental information to the wireless sensor central station;
A detection step of performing the event detection based on the environment information collected by the information collection step;
Have
In the wireless sensor central station,
Receiving the environmental information from each of the plurality of wireless sensor devices;
By comparing and evaluating the event detection condition of each wireless sensor device stored in the database and the received environment information, it is determined whether the determination threshold which is one parameter included in the event detection condition is satisfied. An event detection step to
When it is determined that the received environmental information satisfies the determination threshold in the event detection step, another wireless sensor device having an associated event detection condition is referred to by referring to the database. Selecting as a wireless sensor device to be linked;
Transferring a request command for setting the associated event detection condition to the associated wireless sensor device;
In each of the plurality of wireless sensor devices,
A wireless sensor control method, comprising: an update step of executing an update process of an event detection condition of its own according to the related event detection condition when the request command is received from the wireless sensor central station.

Images