JP2011258109A - Sensing method and sensor network system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate constructing a sensor network system capable of dealing with sensor-state changes in a sensor network system for collecting multiple sensor data containing various sensor types and sensor-state changes, and to reduce cost required for developing the sensor network system.SOLUTION: A sensor network comprises: sensor nodes 10-1 to 10-n for storing information collected by sensors as sensor data; and a sensor data collection device 11 for storing the sensor data transmitted from the sensor nodes. In the sensor network, the type of the sensor node is identified on the basis of identification information (ID) specific to the sensor node, and sensor data collected from the sensor node is stored in relation to the identified sensor node type.

Description

  The present invention relates to a sensing method and a sensor network system, and more particularly to a sensing method and a sensor network system that collect information related to human behavior and state.

In recent years, in order to develop a low-carbon society, energy-saving technology for lighting, air-conditioners, TVs (Television), etc. has been developed.
Specifically, by measuring the usage environment of the device and automatically recognizing the actions of the person using the device, the operation of the device is controlled according to the usage environment of the device and the demands of the person using the device. Therefore, technology for measuring and estimating the state and behavior of people such as body temperature and movement is important.

  Conventionally, for example, a technique for estimating a person's state in real time by measuring and estimating a person's state and behavior such as body temperature and movement by wearing a sensor on the person is known. (Patent Document 1). In addition, a technique for simultaneously measuring not only the state of a person but also the state of what a person operates is known (Patent Document 2).

JP 2006-320290 A JP 2009-89633 A

However, in the conventional techniques such as Patent Documents 1 and 2, since the format of sensor data is different for each type of sensor, in order to collect all of the sensor data acquired by a plurality of sensors of different types, the sensor It is necessary to develop a data collection program for each type of sensor and to build a sensing system (hereinafter referred to as “sensor network system”) that collects data for each type of sensor. There was a problem of getting bigger.
In addition, when collecting sensor data acquired by various sensors worn by humans, not only the various sensors are used, but also the sensor usage and operating conditions, such as frequent sensor attachment / detachment. Changes frequently. Therefore, there has been a problem that it is difficult to construct a sensing system that responds to such changes in sensor usage and operating conditions (hereinafter referred to as "sensor status changes").

  Therefore, in order to solve the above-described problems, the present invention develops a sensor network system that collects sensor data from a plurality of different types of sensors even when there are various types of sensors and changes in sensor status. The purpose is to control the cost and facilitate its construction.

  In order to achieve the above object, the present invention includes a sensor node that stores information collected by a sensor as sensor data, and a sensor data collection device that collects and stores sensor data transmitted from the sensor node. In the sensing method of the configured sensor network, a transmission step of transmitting the sensor node-specific identification information (ID) and the sensor data in association with the sensor data collection device from the sensor node, and the ID transmission step An identification step for causing the sensor data collection device to identify the type of the sensor node based on the identification information (ID) transmitted by the method, and the sensor data transmitted by the sensor data transmission step as the type of the sensor node. Associating and storing in the sensor data collection device Characterized in that it comprises a storage step of.

In the identification step according to the present invention, the type of the sensor node is based on a correspondence table in which the identification information (ID) of the sensor node stored in advance in the sensor data collection device is associated with the type of the sensor node. May be identified.
Furthermore, the identification information (ID) and the sensor data according to the present invention are transmitted after the sensor node receives a request signal transmitted from the sensor data collection device to the sensor node. Sensing method.
Furthermore, the identification information (ID) and the sensor data according to the present invention may be transmitted after the sensor node receives a request signal transmitted from the sensor data collection device to the sensor node.
Furthermore, the identification information (ID) and the sensor data according to the present invention may be transmitted from the sensor node to the sensor data collection device by wireless communication.

  The present invention also provides a sensor network system comprising a sensor node that stores information collected by a sensor as sensor data, and a sensor data collection device that stores sensor data transmitted from the sensor node. A sensor unit that collects information in a node, a node storage unit that stores identification information (ID) unique to the sensor node and the sensor data, and the identification information that is stored in the storage unit with respect to the sensor data collection device (ID) and a transmitter that transmits the sensor data, and the sensor data collection device receives the identification information (ID) and the sensor data transmitted from the sensor node, and the receiver The type of the sensor node is identified based on the identification information (ID) received by And another portion, characterized in that it comprises a storage unit for storing in association with the type of the sensor node identified the sensor data received by the reception unit by the identification unit.

In addition, the identification unit of the sensor data collection device according to the present invention is configured such that the sensor node type is based on a correspondence table in which sensor node identification information (ID) stored in the storage unit is associated with the sensor node type. May be identified.
Furthermore, the sensor data collection device according to the present invention may further include a transmission unit that transmits the identification information (ID) and a transmission request signal of the sensor data to the sensor node.
Furthermore, the transmission unit of the sensor node and the reception unit of the sensor data collection device according to the present invention may have a wireless module that transmits and receives data by wireless communication.

According to the present invention, the sensor data collection device identifies the type of sensor included in the sensor node based on identification information (ID) specific to the sensor node transmitted from the sensor node, and is transmitted from the sensor node. By storing sensor data in the sensor data collection device in association with the identified sensor type, sensor data acquired by various sensors can be collected in association with the sensor type.
Therefore, even when different types of sensors are included, it is possible to reduce the development cost of the sensor network system and easily construct a sensor network system that can respond to changes in the sensor status.

It is a figure which shows the structure of the sensor network system concerning the 1st Embodiment of this invention. It is a figure which shows the structure of the sensor node in the sensor network system concerning the 1st Embodiment of this invention. It is a figure which shows the structure of the gateway apparatus in the sensor network system concerning the 1st Embodiment of this invention. It is a figure which shows an example of the corresponding | compatible table previously memorize | stored in the gateway apparatus in the 1st Embodiment of this invention. It is a sequence diagram which shows the sensing operation of the sensor network system concerning the 1st Embodiment of this invention. It is a figure which shows the structure of the sensor network system concerning the 2nd Embodiment of this invention. It is a sequence diagram which shows the sensing operation of the sensor network system concerning the 2nd Embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
A sensor network system according to a first embodiment of the present invention includes a plurality of sensor nodes having a sensing function by a sensor and a data communication function for transmitting data, and a gateway device that receives data transmitted from the sensor node. The gateway device collects information acquired by the sensor included in the sensor node in association with the type of the sensor.

FIG. 1 is a diagram illustrating a configuration of a sensor network system according to the present embodiment.
As shown in FIG. 1, the sensor network system according to the present embodiment is acquired by a plurality of sensor nodes 10-1 to 10-n that collect information by sensors and these sensor nodes 10-1 to 10-n. And a gateway device 11 that collects the collected information.

The configuration of the sensor node 10-n and the gateway device 11 configuring the sensor network system according to the present embodiment will be described in detail with reference to FIG. 2 and FIG.
As shown in FIG. 2, the sensor node 10-n in this embodiment includes a sensor unit 101-n, a node communication unit 102-n, a control unit 103-n, a node storage unit 104-n, and a display unit 105-n. It consists of and.
The sensor unit 101-n measures information such as an environmental state around the sensor node 10-n and a motion state of a person or a moving object on which the sensor node 10-n is worn by a predetermined sensor. Specifically, latitude / longitude information by a GPS (Global Positioning System) sensor, azimuth information by an azimuth sensor, three-dimensional acceleration information by an acceleration sensor, switch state, concentration information by an atmospheric sensor, and the like can be measured.

The node communication unit 102-n transmits data stored in a node storage unit 104-n described later to the gateway device 11.
The control unit 103-n controls each function of the sensor unit 101-n, the node communication unit 102-n, a node storage unit 104-n and a display unit 105-n which will be described later. Specifically, the above-described hardware resources of the CPU (central processing unit), memory, and interface, which are the hardware configuration of the sensor node 10-n, and the computer program (software) cooperate with each other. Control each function.
The node storage unit 104-n stores identification information (ID) unique to the sensor node 10-n and information measured by the sensor unit 101-n (hereinafter referred to as “sensor data”).
The display unit 105-n displays the state of data communication with the gateway device 11.

  Here, the sensor node 10-n is generally attached to a person or a moving object, and acquires information on the surrounding environment and exercise information of the attached person or moving object by a sensing function of the sensor unit 101-n. . For this reason, when transmitting the ID and sensor data of the sensor node 10-n to the gateway device 11, the node communication unit 102-n needs to transmit data by wireless communication. Specifically, wireless communication means such as a wireless local area network (LAN), BLUETOOTH (registered trademark), specific low power wireless, ZIGBEE (registered trademark), or weak wireless is used as the wireless communication means of the node communication unit 102-n. Can be used.

As shown in FIG. 3, the gateway device 11 according to the present embodiment includes a communication unit 111, an identification unit 112, and a storage unit 113.
The communication unit 111 transmits / receives data to / from the sensor node 10-n by wireless communication, and particularly receives an ID and sensor data transmitted from the sensor node 10-n. The wireless communication unit of the communication unit 111 corresponds to the wireless communication unit included in the node communication unit 102-n of the sensor node 10-n. Specifically, the wireless communication unit 111 includes a wireless local area network (LAN), BLUETOOTH (registered trademark). ), Specific low-power radio, ZIGBEE (registered trademark), weak radio, and other wireless communication means can be used.

The identification unit 112 identifies the type of sensor mounted on the sensor unit 101-n of the sensor node 10-n based on the ID transmitted from the sensor node 10-n.
Specifically, based on the correspondence table in which the ID of the sensor node and the type of the sensor node stored in advance in the storage unit 113 described later are associated, the received ID of the sensor node 10-n is transferred to the sensor unit 101-n. Identifies the type of sensor installed.
Here, an example of the correspondence table stored in advance in the storage unit 113 is shown in FIG. For example, when the ID received by the communication unit 111 is 1, the identification unit 112 compares the correspondence table shown in FIG. 4 with the received ID, and the sensor type of the sensor node that transmitted the ID is a GPS sensor. Identify that.

The storage unit 113 stores the sensor data received by the communication unit 111 in association with the type of sensor identified by the identification unit 112. For example, the received sensor data is stored in association with the correspondence table shown in FIG.
Each of the above-described constituent elements of the gateway device 11 is realized by installing a computer program in a computer including a CPU (Central Processing Unit), a memory, and an interface, which is a hardware configuration of the gateway device 11, and the configuration described above. Various functions of the elements are realized by cooperation of various hardware resources of the computer and the computer program (software).
Further, the gateway device 11 is a sensor that exists in a range in which wireless communication is possible between the node communication unit 102-n and the communication unit 111 of the sensor node 10-n (hereinafter, referred to as “sensor network range”). Sensor data transmitted from the node 10-n is collected and stored in the storage unit 113. The gateway device 11 may have a function of transmitting the stored sensor data to a remote device (for example, a server device).

Next, the operation of the sensor network system according to the present embodiment will be described with reference to the sequence diagram shown in FIG.
As shown in FIG. 5, the sensor node 10-1 is activated (S101), and a packet including identification information (ID) unique to the sensor node 10-1 is transmitted to the gateway device 11 (S102).
The gateway device 11 receives the packet transmitted from the sensor node 10-1, and identifies the sensor type of the sensor node 10-1 based on the ID included in the received packet (S103).

When the sensor node 10-n is activated (S104), the sensor node 10-n transmits an ID to the gateway device 11 (S105).
The gateway device 11 receives the packet transmitted from the sensor node 10-n, and identifies the type of sensor of the sensor node 10-n based on the ID included in the received packet (S106).

  When the sensor node 10-n stores the sensor data, the sensor node 10-n generates a sensor data packet in which the ID and the sensor data are associated (S107), and transmits the sensor data packet to the gateway device 11 (S108). Here, for example, the sensor data packet may be a packet in which information indicating the sensor node ID is added to the header portion of the packet and information indicating the sensor data stored by the sensor node 10-n is added to the data portion. it can.

  The gateway device 11 receives the sensor data packet transmitted from the sensor node 10-n, and based on the ID included in the received sensor data packet, the gateway device 11 converts the sensor data included in the received sensor data packet into the sensor node 10-n. Are stored in association with the sensor type (S109).

  For example, when the correspondence table shown in FIG. 4 is stored in advance in the gateway device 11 and the ID of the sensor node 10-1 is “1” and the ID of the sensor node 10-n is “n”, the gateway device 11, since the ID included in the packet transmitted from the sensor node 10-1 is “1”, the sensor type of the sensor node 10-1 can be identified as “GPS”. Similarly, since the ID included in the packet transmitted from the sensor node 10-n is “n”, the sensor type of the sensor node 10-n can be identified as “atmospheric sensor”.

  Further, since the sensor data packet transmitted from the sensor node 10-1 and the sensor node 10-n is a packet including sensor data to which the ID of each sensor node is added, the gateway device 11 receives the received sensor Data is stored in association with the sensor type identified from the sensor node ID.

Specifically, since the sensor data transmitted from the sensor node 10-1 is “latitude / longitude information” acquired by the “GPS sensor”, the ID of the correspondence table stored in advance in the gateway device 11 ( The “latitude / longitude information” acquired from the sensor node 10-1 is stored in association with “GPS” of “sensor type”.
Similarly, since the sensor data transmitted from the sensor node 10-n is “concentration information” acquired by the “atmospheric sensor”, the ID (sensor type) of the correspondence table stored in advance in the gateway device 11 is used. The “concentration information” acquired from the sensor node 10-n is stored in association with the “atmospheric sensor”.

When the sensor node 10-1 stores the sensor data, the sensor node 10-1 generates a sensor data packet in which the sensor data is associated with the ID (S110), and transmits the sensor data packet to the gateway device 11 (S111).
The gateway device 11 receives the sensor data packet transmitted from the sensor node 10-1, and based on the ID included in the received sensor data packet, the gateway device 11 converts the sensor data included in the received sensor data packet into the sensor node 10-1. Are stored in association with the sensor type (S112).

  Here, when a state where the sensor data packet cannot be normally transmitted from the sensor node 10-1 to the gateway device 11 occurs, the sensor node 10-1 displays a warning message indicating that a communication abnormal state has occurred on the display unit 105-1. (S113). Here, the warning display by the display unit 104-1 may be a display by sound or a display by vibration of a vibrator, in addition to the display by the screen.

Thus, according to the sensor network system according to the present embodiment, the sensor type is identified by the ID of the sensor node received by the gateway device, and the sensor data is stored in association with the identified sensor type. In a sensor network system in which sensor nodes with different sensors are mixed, sensor data transmitted from these sensor nodes can be stored in a unified format, making it easy to add and delete sensor types and sensor nodes It can correspond to.
Therefore, it is possible to easily construct a sensor network system in which sensor nodes having sensors of different sensor types are mixed, and it is easy to develop a program for the gateway device to collect sensor data from the sensor nodes. Development costs can be reduced.

  In the present embodiment, it is described that the ID is transmitted to the gateway device after the sensor node is activated, and further, the sensor data is transmitted in association with the ID when the sensor data is transmitted to the gateway device. There is no problem even if the sensor data is stored and the sensor data packet in which the stored sensor data is associated with the ID is transmitted to the gateway device.

[Second Embodiment]
The sensor network system according to the second embodiment of the present invention transmits a request transmission for transmitting an ID transmission request and a data transmission request to the sensor node to the gateway device 11 in the sensor network system described in the first embodiment. A function and a function of transmitting ID and sensor data to the gateway device in response to a transmission request transmitted from the gateway device to the sensor node 10-n.

FIG. 6 is a diagram illustrating a configuration of the sensor network system according to the present embodiment.
As shown in FIG. 6, the sensor network system according to the present embodiment is acquired by a plurality of sensor nodes 20-1 to 20-n that collect information by sensors, and these sensor nodes 20-1 to 20-n. And a gateway device 21 that collects information.
In addition, about the component of the sensor network system concerning this Embodiment, what has the structure and function similar to the component of the sensor network system demonstrated in 1st Embodiment attaches | subjects the same code | symbol, Detailed description thereof is omitted.

As shown in FIG. 6, the sensor node 20-n in this embodiment includes a sensor unit 101-n, a node communication unit 202-n, a control unit 103-n, a node storage unit 104-n, and a display unit 105-n. It consists of and.
The node communication unit 202-n includes a request receiving unit 202-na that receives an ID transmission request and a data transmission request transmitted from the gateway device 21 described later, and data corresponding to the transmission request transmitted from the gateway device 21. The data transmitting unit 202-nb transmits the data.

As illustrated in FIG. 6, the gateway device 21 according to the present embodiment includes a communication unit 211, an identification unit 112, and a storage unit 113.
The communication unit 211 includes a request transmission unit 211-a that transmits an ID transmission request for requesting ID transmission to the sensor nodes 20-1 to 20-n and a data transmission request for requesting transmission of sensor data, and a sensor The data receiving unit 211-b receives IDs and sensor data transmitted from the nodes 20-1 to 20-n.
Here, each of the above-described components of the sensor nodes 20-1 to 20-n and the gateway device 21 is a CPU (central processing unit) that is a hardware configuration of the sensor nodes 20-1 to 20-n and the gateway device 21. It is realized by installing a computer program in a computer having a memory and an interface, and various functions of the above-described components are realized by cooperation of various hardware resources of the computer and the computer program (software). .

Next, the operation of the sensor network system according to the present embodiment will be described with reference to the sequence diagram shown in FIG.
As shown in FIG. 7, when the gateway device 21 is activated (S201), the gateway device 21 transmits an ID transmission request, which is a transmission request for identification information (ID), to the sensor node 20-1 (S202).
Upon receiving the ID transmission request transmitted from the gateway device 21 (S203), the sensor node 20-1 transmits a packet including the ID of the sensor node 20-1 to the gateway device 21 (S204).

  The gateway device 21 receives the packet transmitted from the sensor node 20-1, and identifies the type of sensor of the sensor node 20-1 based on the ID included in the received packet (S205).

When the sensor type of the sensor node 20-1 is identified, the gateway device 21 transmits a data transmission request, which is a sensor data transmission request, to the sensor node 20-1 (S206).
When the sensor node 20-1 receives the data transmission request transmitted from the gateway device 21 (S207), the sensor node 20-1 transmits a sensor data packet in which the stored sensor data and the ID are associated to the gateway device 21 (S208). ).

  The gateway device 21 receives the sensor data packet transmitted from the sensor node 20-n, and based on the ID included in the received sensor data packet, the gateway device 21 converts the sensor data included in the received sensor data packet into the sensor node 20-n. Are stored in association with the sensor type (S209).

Subsequently, the gateway device 21 transmits an ID transmission request, which is a transmission request for identification information (ID), to the sensor node 20-n (S210).
When the sensor node 20-n receives the ID transmission request transmitted from the gateway device 21 (S211), the sensor node 20-n transmits a packet including the ID of the sensor node 20-n to the gateway device 21 (S212).

  The gateway device 21 receives the packet transmitted from the sensor node 20-n, and identifies the sensor type of the sensor node 20-n based on the ID included in the received packet (S213).

When the sensor type of the sensor node 20-n is identified, the gateway device 21 transmits a data transmission request, which is a sensor data transmission request, to the sensor node 20-1 (S214).
When the sensor node 20-n receives the data transmission request transmitted from the gateway device 21 (S215), the sensor node 20-n transmits a sensor data packet in which the stored sensor data and the ID are associated to the gateway device 21 (S215). ).

Here, when a state where the sensor data packet cannot be normally transmitted from the sensor node 20-n to the gateway device 21 occurs, the sensor node 20-n displays a warning that a communication abnormal state has occurred (S216). Here, the warning display by the sensor node 20-n may be a display by sound or a display by vibration of a vibrator in addition to the display by the screen. Further, the sensor node 20-n may record information indicating that a communication abnormal state has occurred in a storage device (the node storage unit 104-n and a storage device (not shown)).
The gateway device 21 detects and records a communication abnormality with the sensor node 20-n such that the sensor data packet cannot be normally received from the sensor node 20-n (S217).

  Thus, according to the sensor network system according to the present embodiment, the sensor node that has received the transmission request transmitted from the gateway device returns the ID and the sensor data to the gateway device. It is possible to easily and accurately grasp the detection of the communication abnormality of the sensor network, and it is possible to easily realize the maintenance management of the sensor network system.

  In the above-described embodiment of the present invention, the sensor units 101-1 to 101-n of the sensor nodes 10-1 to 10-n have been described as including one type of sensor. It may be provided. In this case, the effect of the present invention can be obtained by associating one piece of unique identification information (ID) with the sensor provided.

  It can be used in a control system that realizes energy saving in devices such as lighting, air conditioners, and television devices by measuring and estimating human actions and states.

  10-1 to 10-n, 20-1 to 20-n ... sensor node, 11, 21 ... gateway device, 101-1 to 101-n ... sensor unit, 102-1 to 102-n, 202-1 to 202 -N node communication unit, 202-1-a to 202-na ... request receiving unit, 202-1-b to 202-nb ... data transmission unit, 103-1 to 103-n ... control unit, 104-1 to 104-n ... node storage unit, 105-1 to 105-n ... display unit, 111, 211 ... communication unit, 211-a ... request transmission unit, 211-b ... data reception unit, 112 ... identification unit 113. Storage unit.

Claims (8)

In a sensor network sensing method comprising a sensor node that stores information collected by a sensor as sensor data, and a sensor data collection device that collects and stores sensor data transmitted from the sensor node.
A transmission step of associating the sensor data with identification information (ID) unique to the sensor node and transmitting the sensor data from the sensor node to the sensor data collection device;
An identification step for causing the sensor data collection device to identify the type of the sensor node based on the identification information (ID) transmitted in the ID transmission step;
A storage step of storing the sensor data transmitted in the sensor data transmission step in the sensor data collection device in association with the type of the sensor node. The sensing method according to claim 1,
In the identifying step, the type of the sensor node is identified based on a correspondence table in which the identification information (ID) of the sensor node stored in advance in the sensor data collection device is associated with the type of the sensor node. Sensing method. The sensing method according to claim 1 or 2,
The sensing method, wherein the identification information (ID) and the sensor data are transmitted after the sensor node receives a request signal transmitted from the sensor data collection device to the sensor node. The sensing method according to any one of claims 1 to 3,
The identification method (ID) and the sensor data are transmitted from the sensor node to the sensor data collection device by wireless communication. In a sensor network system including a sensor node that stores information collected by a sensor as sensor data, and a sensor data collection device that stores sensor data transmitted from the sensor node,
The sensor node is
A sensor unit for collecting information;
A node storage unit for storing sensor node specific identification information (ID) and the sensor data;
A transmission unit that transmits the identification information (ID) stored in the storage unit and the sensor data to the sensor data collection device;
The sensor data collection device includes:
A receiving unit for receiving the identification information (ID) and the sensor data transmitted from the sensor node;
An identification unit for identifying the type of the sensor node based on the identification information (ID) received by the reception unit;
A sensor network system comprising: a storage unit that stores the sensor data received by the receiving unit in association with the type of the sensor node identified by the identification unit. The sensor network system according to claim 5,
The identification unit of the sensor data collection device identifies the type of the sensor node based on a correspondence table that associates sensor node identification information (ID) stored in the storage unit in advance with the type of the sensor node. Sensor network system. The sensor network system according to claim 5 or 6,
The sensor data collection apparatus further includes a transmission unit that transmits the identification information (ID) and a transmission request signal of the sensor data to the sensor node. The sensor network system according to any one of claims 5 to 7,
The sensor network system, wherein the transmission unit of the sensor node and the reception unit of the sensor data collection device include a wireless module that transmits and receives data by wireless communication.

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