JP5814154B2 - Gateway, sensor network system, sensor control method, and program - Google Patents

Description

  The present invention relates to a gateway, a sensor network system, a sensor control method, and a program, and more particularly, to a technique applied to a sensor network system including a plurality of sensors.

  In recent years, a system that connects various types of sensors and sensor nodes equipped with wireless communication functions to a network and collects and analyzes the measurement results detected by these sensors from a sensor node to a server (hereinafter referred to as “sensor network system”). Has been proposed). For example, Patent Document 1 describes a sensor network system (surface temperature monitoring system) that collects surface temperature measurement results of a junction box of an underground cable from a wireless node equipped with a wireless sensor through the Internet.

  In ZigBee (registered trademark), one of the global standards for short-range wireless communication for home appliances, a gateway (hereinafter referred to as GW) is provided between the sensor node and the server, and the sensor node is in a place where wireless communication is not possible. The measurement result of the sensor of the sensor node can be collected in the server (for example, see Non-Patent Document 1). The GW used in this ZigBee was a stationary box type with no restrictions on power consumption, processing capacity, and memory capacity. In ZigBee, a sensor measurement instruction, a transmission instruction of a measurement result detected by the sensor to the GW, a timing of switching the sensor node to the sleep mode and a start timing from the sleep mode to reduce power consumption Is controlled by a profile previously set in the sensor node.

JP 2009-278608 A

http: // www. zbsigj. org / [Search January 10, 2012]

  However, in ZigBee, the transmission timing of the measurement result to the GW is controlled by a profile preset in the sensor node, so the GW must be prepared so that the measurement result can be received simultaneously from all connectable sensor nodes. In addition, there is a problem in that it must be a box-type dedicated device for stationary use without restrictions on power consumption, processing capacity, and memory capacity.

  In addition, even if it is determined by the server that the measurement result is abnormal, the detection timing of the measurement result at the sensor node is controlled by the profile preset in the sensor node. The detection timing of could not be changed.

  Furthermore, even if it takes a long time to transmit measurement results due to temporary communication interruptions, etc., since the sensor enters sleep for a certain period of time set in the profile in advance after the transmission, the sensor measurement interval is gradually increased. There is a problem that the measurement interval is shifted. Furthermore, in the case of long-term operation, there is a problem that a large shift occurs in the measurement interval for each sensor node.

  Therefore, the present invention has been made in view of the above-described problems, and a gateway that can be used in a sensor network system even when there is a restriction on power consumption, processing capability, or memory capacity, and the gateway. An object of the present invention is to provide a sensor network system, a sensor control method, and a program. It is another object of the present invention to provide a gateway that does not cause a deviation in sensor measurement interval.

  The present invention proposes the following matters in order to solve the above problems. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

(1) The present invention is a gateway that is connected to a server via a network and connected to a plurality of sensor nodes via short-range wireless communication, and is a first that performs the short-range wireless communication with the sensor node. Communication means (for example, equivalent to the short-range wireless communication unit 21 in FIG. 1), second communication means for communicating with the server via the network (for example, equivalent to the communication unit 22 in FIG. 1), the plurality sensor nodes setting the measurement interval of the sensors provided in each set of address information of the destination gateway measurements detected by those the sensor, and the measurement results received from the plurality of sensor nodes to said server Operation parameter storage means (for example, receiving and storing operation parameters including at least a transmission interval setting from the server via the second communication means) , And equivalent) operating parameters storage unit 23 of FIG. 1, the operation in the measurement interval parameter is set to the operating parameters stored in the storage unit, the measurement result and the measurement by the sensor to the sensor node and transmission via the first communication means before Symbol an instruction of transmission, in response to the instruction, the sensor node obtains through the front Symbol first communication means measurements obtained by driving the sensor Control means for transmitting the measurement results received from the plurality of sensor nodes to the server via the second communication means at the transmission interval set in the operation parameter (for example, to the control unit 24 in FIG. 1) and equivalent), includes a further said operating parameter comprises a setting of the status determination threshold used to determine when the sensor is placed, the measuring of the operating parameters A situation is set for each situation where the sensor is placed, and the control means compares the measurement result acquired from the sensor node with the situation determination threshold value, and the situation where the sensor is placed. And transmits an instruction to the sensor node for measurement and transmission of the measurement result to the sensor node through the first communication means at the determined measurement interval set in the operation parameter. And the gateway characterized by acquiring the measurement result acquired by the said sensor node driving the said sensor according to the said instruction | indication via said 1st communication means is proposed.

According to this invention, the first communication means performs short-range wireless communication with the sensor node. The second communication means communicates with the server via the network. Operating parameter storage means, setting the measurement interval of the sensors provided in each of the plurality of sensor nodes, setting the destination gateway address information of measurement results detected by the sensor, and the measurement results received from a plurality of sensor nodes The operation parameter including at least the setting of the transmission interval to the server is received from the server via the second communication means and stored. Control means, in the measurement interval set operating parameters stored in the operation parameter storing unit, an instruction of transmission of measurement results with measurement by sensor to sensor node via the first communication means transmits and, in response to the instruction, the sensor node obtains via the first communication means measurements obtained by driving the sensor at the transmission interval is set to the operating parameters, it received from a plurality of sensor nodes measuring The result is transmitted to the server via the second communication means. Further, the operation parameter includes a setting of a situation determination threshold value used to determine the situation where the sensor is placed, and the measurement interval of the operation parameter is set for each situation where the sensor is placed, and the control means Determines the situation where the sensor is placed by comparing the measurement result obtained from the sensor node and the situation judgment threshold, and at the measurement interval of the judged situation set in the operation parameter, the sensor node On the other hand, an instruction for measurement by the sensor and transmission of the measurement result is transmitted via the first communication means, and the measurement result obtained by driving the sensor by the sensor node according to the instruction is transmitted via the first communication means. Get. Therefore, since the operation content of the sensor node is set in the operation parameter transmitted from the server to the gateway, the sensor node operates according to an instruction from the gateway. Therefore, the gateway can control the number of sensor nodes that perform communication at the same time, and can reduce the processing load for receiving measurement results from the sensor nodes. As a result, it is possible to use a gateway with limited power consumption, processing capability, or memory capacity in the sensor network system, and it is also possible to use a general-purpose device for the gateway. Furthermore, the gateway collects the measurement results at the measurement interval according to the user's needs by judging the situation where the sensor is placed and changing the sensor measurement interval and the sensor node sleep time according to the situation. can do.

  (2) In the gateway according to (1), the control unit receives the measurement result from the sensor node, and transmits the operation parameter measurement interval and the instruction to the sensor node in response to the measurement result received from the sensor node. Proposes a gateway characterized in that the sleep time is determined based on the time from when the measurement is received until the measurement result is received, and the sensor node is operated in a sleep mode that suppresses power consumption for the determined sleep time. .

  According to this invention, the control means, in response to receiving the measurement result from the sensor node, based on the measurement interval of the operation parameter and the time from the transmission of the instruction to the sensor node until the reception of the measurement result, The sleep time is determined, and the sensor node is operated in a sleep mode that suppresses power consumption for the determined sleep time. Therefore, by controlling the sleep time of the sensor node by the gateway, it is possible to eliminate the deviation in the measurement interval even when communication takes time due to deterioration of the communication environment or the like.

(3) The present invention relates to the gateway according to (1) or (2), wherein the operation parameter is determined from the plurality of sensor nodes from the own device to the server for each situation where the sensor is placed. Including the setting of the transmission interval of the received measurement result, and the control means receives the measurement result received from the plurality of sensor nodes at the transmission interval of the determined condition set in the operation parameter. A gateway characterized by transmitting to the server via means is proposed.

According to the present invention, the operation parameter includes setting of transmission intervals of measurement results received from a plurality of sensor nodes from the own device to the server for each situation where the sensor is placed. The control means transmits the measurement results received from the plurality of sensor nodes to the server via the second communication means at the determined transmission interval set in the operation parameter. Therefore, for example, when an abnormality occurs and an emergency occurs, the measurement result is sent to the server in real time, such as sending the measurement result to the server in real time. You can be notified of the situation.

(4) In the gateway according to (1) to (3), the operation parameter includes a connection between the own device and the server, and a connection between the own device and the plurality of sensor nodes. In response to this, a gateway is proposed which is transmitted from the server to the device itself and stored in the operation parameter storage means .

According to the present invention, the operation parameter is transmitted from the server to the own device in response to the establishment of the connection between the own device and the server and the connection between the own device and the plurality of sensor nodes. Stored in. Therefore, since the gateway can acquire from the server the operation parameters in which the operation of the plurality of sensor nodes that have established the connection is set, the gateway connected to the sensor node may not be fixed, and a portable gateway should be used. Can do.

(5) The present invention proposes a gateway characterized by being a portable electronic device for the gateway described in (1) to (4).

According to the present invention, the gateway is a portable electronic device.

(6) The present invention relates to a server (for example, equivalent to the server 30 in FIG. 1), a gateway connected to the server via a network (for example, equivalent to the gateway 20 in FIG. 1), and the gateway and a short distance. A sensor network system including a plurality of sensor nodes (for example, equivalent to the sensor node 10 in FIG. 1) connected via wireless communication, wherein the sensor node performs the short-range wireless communication with the gateway. Means (for example, equivalent to the short-range wireless communication unit 14 in FIG. 1), a sensor for detecting a physical quantity and obtaining a measurement result (for example, equivalent to the sensor 12 in FIG. 1), and an instruction from the gateway , Sensor control means for transmitting the measurement result obtained by driving the sensor to the gateway via the sensor communication means (for example, , Corresponding to the control unit 11 in FIG. 1), and the server communicates with the gateway via a network (for example, corresponding to the communication unit 31 in FIG. 1), and the plurality of sensors Setting of measurement interval by each sensor of each node, setting of address information of transmission destination gateway of measurement result detected by said sensor, and transmission interval of measurement result received from said plurality of sensor nodes from said gateway to own device Server control means (for example, equivalent to the control unit 34 in FIG. 1) that transmits an operation parameter including at least the setting of the parameter to the gateway via the server communication means, and measurement received from the sensor node via the gateway Measurement result storage means for storing results (for example, corresponding to the measurement result storage unit 35 of FIG. 1), The route is a first communication means (for example, equivalent to the short-range wireless communication unit 21 in FIG. 1) that performs the short-range wireless communication with the sensor node, and a second communication means that communicates with the server via the network. (For example, corresponding to the communication unit 22 in FIG. 1) and the operation parameter storage unit (for example, the operation parameter storage unit 23 in FIG. 1) that receives and stores the operation parameter from the server via the second communication unit. And the first communication is instructed to perform measurement by the sensor and transmission of the measurement result to the sensor node at a measurement interval set in the operation parameter stored in the operation parameter storage unit. A measurement result obtained by driving the sensor by the sensor node according to the instruction, obtaining the measurement result via the first communication means, and Control means for transmitting the measurement results received from the plurality of sensor nodes to the server via the second communication means at the transmission interval set in the parameter (for example, corresponding to the control unit 24 in FIG. 1) And the operation parameter includes a setting of a condition determination threshold value used to determine the condition in which the sensor is placed, and the measurement interval of the operation parameter is set to Set for each situation, the control means judges the situation where the sensor is placed by comparing the measurement result acquired from the sensor node and the situation judgment threshold, and the operation parameter An instruction for measurement by the sensor and transmission of the measurement result is sent to the sensor node via the first communication means at the measurement interval of the determined situation set in And a sensor network system characterized in that the sensor node acquires the measurement result acquired by driving the sensor in response to the instruction via the first communication means .

According to the present invention, the sensor node includes a sensor communication unit, a sensor, and a sensor control unit. The sensor communication unit performs near field communication with the gateway. The sensor detects a physical quantity and acquires a measurement result. The sensor control means transmits the measurement result obtained by driving the sensor to the gateway via the sensor communication means in response to an instruction from the gateway. The server includes server communication means, server control means, and measurement result storage means. The server communication means communicates with the gateway via the network. The server control means sets the measurement interval by each sensor of the plurality of sensor nodes, sets the address information of the destination gateway of the measurement result detected by the sensor, and receives from the plurality of sensor nodes from the gateway to the own device. The operation parameter including at least the setting of the transmission interval of the measurement result is transmitted to the gateway via the server communication unit. The measurement result storage unit stores the measurement result received from the sensor node via the gateway. The gateway includes first communication means, second communication means, operation parameter storage means, and control means. The first communication means performs the short-range wireless communication with the sensor node. The second communication means communicates with the server via the network. The operation parameter storage means receives and stores the operation parameter from the server via the second communication means. The control means transmits an instruction for measurement by the sensor and transmission of the measurement result to the sensor node via the first communication means at the measurement interval set in the operation parameter stored in the operation parameter storage means. In response to the instruction, the measurement result obtained by driving the sensor by the sensor node is obtained via the first communication means, and the measurement received from the plurality of sensor nodes at the transmission interval set in the operation parameter. The result is transmitted to the server via the second communication means. Further, the operation parameter includes a setting of a situation determination threshold value used to determine the situation where the sensor is placed, and the measurement interval of the operation parameter is set for each situation where the sensor is placed and controlled. The means judges the situation where the sensor is placed by comparing the measurement result acquired from the sensor node and the situation judgment threshold, and at the measurement interval of the judged situation set in the operation parameter, the sensor An instruction for measurement by the sensor and transmission of the measurement result is transmitted to the node via the first communication means, and the measurement result obtained by driving the sensor by the sensor node according to the instruction is sent to the first communication means. To get through. Therefore, since the operation content of the sensor node is set in the operation parameter transmitted from the server to the gateway, the sensor node operates according to an instruction from the gateway. Therefore, the gateway can control the number of sensor nodes that perform communication at the same time, and can reduce the processing load for receiving measurement results from the sensor nodes. As a result, it is possible to use a gateway with limited power consumption, processing capability, or memory capacity in the sensor network system, and it is also possible to use a general-purpose device for the gateway. Furthermore, the gateway collects the measurement results at the measurement interval according to the user's needs by judging the situation where the sensor is placed and changing the sensor measurement interval and the sensor node sleep time according to the situation. can do.

(7) The present invention provides a sensor control method in a gateway connected to a server via a network and connected to a plurality of sensor nodes via short-range wireless communication, wherein the gateway includes first communication means, A second communication unit, an operation parameter storage unit, and a control unit, wherein the operation parameter storage unit sets a measurement interval of a sensor provided in each of the plurality of sensor nodes, and transmits a measurement result detected by the sensor. An operation parameter including at least setting of address information of a destination gateway and setting of transmission intervals of measurement results received from the plurality of sensor nodes from the own device to the server is transmitted from the server via the second communication unit. A parameter storage step for receiving and storing (for example, step S5 in FIG. 2) and the control procedure The stage communicates an instruction to the sensor node for measurement by the sensor and transmission of the measurement result at the measurement interval set in the operation parameter stored in the operation parameter storage means. A measurement instruction step (equivalent to steps S11 and S18 in FIG. 3) transmitted via the means, and the sensor node drives the sensor in accordance with the instruction transmitted by the control means in the measurement instruction step. A measurement result acquisition step (for example, equivalent to step S13 in FIG. 3) for acquiring the acquired measurement result via the first communication unit, and the control unit at a transmission interval set in the operation parameter, A measurement result transmitting step for transmitting the measurement results received from the plurality of sensor nodes to the server via the second communication means (for example, the step of FIG. 3). And the operation parameter includes a setting of a condition determination threshold value used to determine the condition where the sensor is placed, and the measurement interval of the operation parameter is It is set for each situation where the sensor is placed, and the measurement result acquisition step compares the measurement result obtained from the sensor node with the situation determination threshold value to determine the situation where the sensor is placed. An instruction for measurement by the sensor and transmission of the measurement result is transmitted to the sensor node via the first communication means at the measurement interval of the determined condition set in the operation parameter. The measurement result obtained by the sensor node driving the sensor in response to the instruction is obtained via the first communication means (for example, step 14, FIG. 4 considerable) has proposed a sensor control method characterized by.

According to the present invention, first, in the parameter storage step, the operation parameter storage means sets the measurement interval of the sensor provided in each of the plurality of sensor nodes, and the address information of the destination gateway of the measurement result detected by the sensor. Operation parameters including at least settings and transmission interval settings of measurement results received from a plurality of sensor nodes from the own device to the server are received from the server via the second communication means and stored. Next, in the measurement instruction step, the control unit instructs the sensor node to perform measurement by the sensor and transmission of the measurement result at the measurement interval set in the operation parameter stored in the operation parameter storage unit. And transmitted via the first communication means. Next, in the measurement result acquisition step, the control unit acquires the measurement result acquired by the sensor node driving the sensor in accordance with the instruction transmitted in the measurement instruction step via the first communication unit. Next, in the measurement result transmission step, the control means transmits the measurement results received from the plurality of sensor nodes to the server via the second communication means at the transmission interval set in the operation parameter. Furthermore, the operation parameter includes setting of a situation determination threshold value used to determine the situation where the sensor is placed, and the measurement interval of the operation parameter is set for each situation where the sensor is placed, and the measurement result The acquisition step determines the situation where the sensor is placed by comparing the measurement result acquired from the sensor node and the situation determination threshold, and at the measurement interval of the determined situation set in the operation parameter, An instruction for measurement by the sensor and transmission of the measurement result is transmitted to the sensor node via the first communication means, and the measurement result obtained by driving the sensor according to the instruction is obtained by the first communication means. To get through. Therefore, since the operation content of the sensor node is set in the operation parameter transmitted from the server to the gateway, the sensor node operates according to an instruction from the gateway. Therefore, the gateway can control the number of sensor nodes that perform communication at the same time, and can reduce the processing load for receiving measurement results from the sensor nodes. As a result, it is possible to use a gateway with limited power consumption, processing capability, or memory capacity in the sensor network system, and it is also possible to use a general-purpose device for the gateway. Furthermore, the gateway collects the measurement results at the measurement interval according to the user's needs by judging the situation where the sensor is placed and changing the sensor measurement interval and the sensor node sleep time according to the situation. can do.

(8) The present invention is a program for causing a computer to execute a sensor control method in a gateway connected to a server via a network and connected to a plurality of sensor nodes via short-range wireless communication. , A first communication unit, a second communication unit, an operation parameter storage unit, and a control unit, wherein the operation parameter storage unit sets a measurement interval of a sensor provided in each of the plurality of sensor nodes, and is detected by the sensor. Operating parameters including at least the setting of address information of the transmission destination gateway of the measured results and the setting of transmission intervals of the measurement results received from the plurality of sensor nodes from the own device to the server. 2. Parameter storage step received and stored via communication means (eg, figure 2 and step S5), and the control means performs measurement by the sensor and measurement result for the sensor node at the measurement interval set in the operation parameter stored in the operation parameter storage means. A measurement instruction step (for example, equivalent to steps S11 and S18 in FIG. 3) for transmitting an instruction to transmit via the first communication means, and the control means according to the instruction transmitted in the measurement instruction step A measurement result acquisition step (for example, corresponding to step S13 in FIG. 3) for acquiring the measurement result acquired by driving the sensor by the sensor node via the first communication unit, and the control unit includes the operation parameter The measurement results transmitted from the plurality of sensor nodes at the transmission interval set to be transmitted to the server via the second communication means. A result transmission step (e.g., equivalent to steps S16 and S17 in FIG. 3), and the operating parameter includes a setting of a situation determination threshold value used to determine a situation where the sensor is placed, The measurement interval of the operation parameter is set for each situation where the sensor is placed, and the measurement result acquisition step compares the measurement result acquired from the sensor node with the situation determination threshold value. The situation where the sensor is placed is judged, and at the measurement interval of the judged situation set in the operation parameter, the sensor node is instructed to perform measurement by the sensor and transmission of the measurement result. A measurement result transmitted through the first communication means and acquired by the sensor node driving the sensor in response to the instruction via the first communication means. To characterized (e.g., step 14 in FIG. 3, corresponds to FIG. 4) has proposed a program to be executed by a computer.

According to the present invention, first, in the parameter storage step, the operation parameter storage means sets the measurement interval of the sensor provided in each of the plurality of sensor nodes, and the address information of the destination gateway of the measurement result detected by the sensor. Operation parameters including at least settings and transmission interval settings of measurement results received from a plurality of sensor nodes from the own device to the server are received from the server via the second communication means and stored. Next, in the measurement instruction step, the control unit instructs the sensor node to perform measurement by the sensor and transmission of the measurement result at the measurement interval set in the operation parameter stored in the operation parameter storage unit. And transmitted via the first communication means. Next, in the measurement result acquisition step, the control unit acquires the measurement result acquired by the sensor node driving the sensor in accordance with the instruction transmitted in the measurement instruction step via the first communication unit. Next, in the measurement result transmission step, the control means transmits the measurement results received from the plurality of sensor nodes to the server via the second communication means at the transmission interval set in the operation parameter. Furthermore, the operation parameter includes setting of a situation determination threshold value used to determine the situation where the sensor is placed, and the measurement interval of the operation parameter is set for each situation where the sensor is placed, and the measurement result The acquisition step determines the situation where the sensor is placed by comparing the measurement result acquired from the sensor node and the situation determination threshold, and at the measurement interval of the determined situation set in the operation parameter, An instruction for measurement by the sensor and transmission of the measurement result is transmitted to the sensor node via the first communication means, and the measurement result obtained by driving the sensor according to the instruction is obtained by the first communication means. To get through. Therefore, since the operation content of the sensor node is set in the operation parameter transmitted from the server to the gateway, the sensor node operates according to an instruction from the gateway. Therefore, the gateway can control the number of sensor nodes that perform communication at the same time, and can reduce the processing load for receiving measurement results from the sensor nodes. As a result, it is possible to use a gateway with limited power consumption, processing capability, or memory capacity in the sensor network system, and it is also possible to use a general-purpose device for the gateway. Furthermore, the gateway collects the measurement results at the measurement interval according to the user's needs by judging the situation where the sensor is placed and changing the sensor measurement interval and the sensor node sleep time according to the situation. can do.

  According to the present invention, a gateway with limited power consumption, processing capacity, or memory capacity is used in a sensor network system by controlling the sensor node and reducing communication processing with the sensor node in the gateway. And a general-purpose device can be used for the gateway. In addition, measurement results can be acquired from the sensor node at a predetermined constant interval, and the measurement interval can be prevented from shifting.

It is a figure which shows the structure of the sensor network system which concerns on this embodiment. It is a figure which shows the starting process flow of the sensor network system which concerns on this embodiment. It is a figure which shows the sensor node control processing flow of the sensor network system which concerns on this embodiment. It is a figure which shows the measurement result judgment processing flow of the sensor network system which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the constituent elements in the present embodiment can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the present embodiment does not limit the contents of the invention described in the claims.

  The present embodiment will be described with reference to FIGS. The present invention is a system in which a gateway controls a sensor node in a sensor network system in which measurement results detected by sensors of the sensor node are managed by a server.

  FIG. 1 is a diagram illustrating a configuration of a sensor network system 1 according to the present embodiment. As shown in the figure, the sensor network system 1 includes a sensor node 10, a gateway (GW) 20, and a server 30. In the figure, only one GW 20 and sensor node 10 are described, but a plurality of sensor nodes 10 may be connected to one GW 20, and a plurality of GWs 20 may be connected to one server 30. It may be connected.

  The sensor node 10 is installed in a device such as a building or an automobile, performs measurement with a sensor provided, and transmits a measurement result detected by the sensor to the server 30 via the GW 20. As shown in the figure, the sensor node 10 includes a sensor 12, a measurement result temporary storage unit 13, a short-range wireless communication unit 14, a control unit 11, and a battery 15.

  When receiving a measurement instruction from the GW 20, the control unit 11 drives the sensor 12 to perform measurement, and transmits the detected measurement result to the GW 20. The control part 11 transmits a measurement result to GW20 sequentially after a measurement. In addition, when transmitting a measurement result to GW20 after a measurement, when a measurement result is stored in the measurement result temporary storage part 13 mentioned later, the stored measurement result is collectively transmitted to GW20. In addition, when receiving a sleep instruction from the GW 20, the control unit 11 operates in the sleep mode for a specified time.

  The sensor 12 is, for example, a temperature sensor that measures temperature, a humidity sensor that measures humidity, a concentration sensor that measures the concentration of gas or liquid, a speed sensor that measures speed, or the like.

  The measurement result temporary storage unit 13 temporarily stores the measurement result after measurement by the sensor 12 when the control unit 11 transmits the measurement result to the GW 20 and cannot be transmitted to the GW 20 due to deterioration of the communication environment or the like. The measurement result stored in the measurement result temporary storage unit 13 is transmitted to the GW 20 together with the measurement result detected after the next measurement. The measurement result temporary storage unit 13 deletes the measurement result when the stored measurement result is transmitted to the GW 20.

  The short-range wireless communication unit 14 transmits a measurement instruction and a measurement result transmission instruction from the GW 20 via the short-range wireless communication (hereinafter, the measurement instruction is a measurement instruction to the sensor 12 and a transmission instruction of the measurement result detected by the sensor 12). And the sleep instruction are received and passed to the control unit 11. The short-range wireless communication unit 14 transmits the measurement result detected by the control unit 11 with the sensor 12 to the GW 20. For short-range wireless communication, for example, infrared communication, Bluetooth (registered trademark), or WiFi can be used.

  The battery 15 is used to drive the sensor node 10, and is, for example, a dry battery or a storage battery.

  The GW 20 transfers the measurement result of the sensor node 10 to the server 30 and controls the sensor node 10. As shown in the figure, the GW 20 includes a short-range wireless communication unit 21, a communication unit 22, an operation parameter storage unit 23, a control unit 24, and a measurement result temporary storage unit 25. Note that the GW 20 is a portable electronic device such as a mobile phone, a tablet terminal, a book terminal, a PDA, or a smartphone, and can communicate at least wirelessly and has a storage unit (memory).

  The short-range wireless communication unit 21 transmits a measurement instruction and a sleep instruction to the sensor node 10 via the short-range wireless communication in accordance with an instruction from the control unit 24. The short-range wireless communication unit 21 receives the measurement result from the sensor node 10. The short-range wireless communication that can be used is the same as that of the sensor node 10.

  The communication unit 22 transmits the measurement result received from the sensor node 10 to the server 30 via the network in accordance with an instruction from the control unit 24. In addition, the communication unit 22 receives operation parameters from the server 30.

  The operation parameter storage unit 23 stores the operation parameters received from the server 30 via the communication unit 22. Here, in the operation parameter, information specifying the operation of the sensor node 10 and information related to communication with the server 30 are set. The information specifying the operation of the sensor node 10 includes an ID and address for uniquely identifying the sensor node 10, information for identifying the type of sensor to be measured, a measurement interval at which the sensor 12 detects the measurement result, and a sensor from the measurement result. The situation determination threshold value used for judging the situation where 12 is placed is included. The measurement interval includes a measurement interval for each situation where the sensor 12 is placed, and includes, for example, a normal measurement interval and an abnormal measurement interval. Thereby, when a detailed measurement result is desired, such as when there is an abnormality, the measurement interval can be shortened.

  The situation determination threshold value is compared with the measurement result received from the sensor node 10 in the control unit 24. The control unit 24 determines the situation where the sensor 12 is placed from the situation determination threshold value and the measurement result, and instructs the sensor node 10 to perform a measurement instruction at the measurement interval set in the operation parameter for the determined situation. I do.

  The information related to communication with the server 30 includes at least an interval (hereinafter referred to as a server transmission interval) for transmitting the measurement result temporarily stored in the measurement result temporary storage unit 25 described later to the server 30 via the communication unit 22. It is.

  The control unit 24 issues a measurement instruction to the sensor node 10 at the measurement interval set in the operation parameter stored in the operation parameter storage unit 23. Further, in response to receiving the measurement result from the sensor node 10, the control unit 24 measures the measurement interval set in the operation parameter and the time from when the measurement instruction is transmitted to the sensor node 10 until the measurement result is received. Based on the above, the sleep time is determined. And the control part 24 transmits the instruction | indication which operate | moves in the sleep mode which suppresses the power consumption of the sensor node 10 to the sensor node 10 only for the determined sleep time.

  Further, the control unit 24 displays the measurement result temporarily stored in the measurement result temporary storage unit 25 described later according to the server transmission interval set in the operation parameter stored in the operation parameter storage unit 23. Send to. Note that. For example, the control unit 24 may transmit an operation log including a measurement instruction log to the sensor node 10 and a measurement result reception log from the sensor node 10 to the server 30.

  The measurement result temporary storage unit 25 temporarily stores the measurement result received from the sensor node 10 via the short-range wireless communication unit 21. The measurement result temporary storage unit 25 deletes the measurement result when the stored measurement result is transmitted to the GW 20.

  The server 30 stores the measurement result received from the sensor node 10 via the GW 20, and outputs the measurement result stored in response to a request from the user or the like. As shown in the figure, the server 30 includes a communication unit 31, an input unit 32, a display unit 33, a control unit 34, a measurement result storage unit 35, and an operation parameter storage unit 36.

  The communication unit 31 transmits the operation parameter to the GW 20 via the network according to the instruction from the control unit 34. Further, the communication unit 31 receives the measurement result of the sensor node 10 from the GW 20. Note that the communication unit 31 can also receive the operation log from the GW 20 as the operation log.

  The input unit 32 is, for example, a keyboard or a mouse, and receives an instruction from the user when displaying the measurement result stored in the measurement result storage unit 35 described later on the display unit 33. The input unit 32 receives an input for creating an operation parameter or changing an operation parameter stored in an operation parameter storage unit 36 to be described later.

  The display unit 33 displays the measurement result stored in the measurement result storage unit 35 described later in accordance with an instruction from the user input to the input unit 32. Examples of the display method include a table listing the measurement results, a diagram illustrating the measurement results in a graph, and the like. Moreover, you may display the measurement result extracted according to the conditions instruct | indicated from the user. The display unit 33 displays operation parameters stored in an operation parameter storage unit 36, which will be described later. The displayed operation parameter can be changed by the user via the input unit 32.

  When the sensor network system is activated, the control unit 34 transmits the operation parameters stored in the operation parameter storage unit 36 to the GW 20 via the communication unit 31 after the authentication of the GW 20. The control unit 34 transmits a new operation parameter to the GW 20 via the communication unit 31 when an operation parameter is changed or added after the sensor network system is activated. When a plurality of operation parameters are stored in the operation parameter storage unit 36, it is necessary to select an operation parameter to be transmitted to the GW 20 from the input unit 32 according to a user designation or the like. Moreover, if the control part 34 detects that it is at the time of abnormality from the space | interval which receives a measurement result from GW20 via the communication part 31, it will send an e-mail etc. and alert a user.

  The measurement result storage unit 35 stores the measurement result of the sensor node 10 received via the GW 20. The measurement result is stored for each sensor node.

  The operation parameter storage unit 36 stores the operation parameters created by the display unit 33 and the input unit 32.

  Next, each process in the sensor network system 1 will be described.

  FIG. 2 is a diagram showing a startup process flow of the sensor network system 1 according to the present embodiment. The sensor network system 1 starts processing in response to the activation of the GW 20.

  First, in step S <b> 1, the control unit 24 of the GW 20 transmits to the server 30 information identifying itself (for example, address information of the GW 20) and a start notification that the self is started.

  Next, in step S <b> 2, the control unit 34 of the server 30 authenticates the GW 20 based on information specifying the GW 20 included in the activation notification in response to receiving the activation notification from the GW 20.

  Next, in step S3, the control unit 34 of the server 30 transmits the authentication result of the GW 20 performed in step S2 to the GW 20. When the authentication result is successful, the server 30 transmits the operation parameter together with the authentication result.

  Next, in step S4, the control unit 24 of the GW 20 determines whether the authentication result received from the server 30 is successful. If the authentication result is authentication success (YES), the process proceeds to step S5. If the authentication result is authentication failure (NO), the process ends.

  Next, in step S <b> 5, the control unit 24 of the GW 20 stores the operation parameter received together with the authentication result from the server 30 in the operation parameter storage unit 23.

  Next, in step S6, the control unit 24 of the GW 20 establishes a connection with the sensor node 10 set in the operation parameter stored in the operation parameter storage unit 23 in step S5.

  Next, in step S7, the control unit 24 of the GW 20 transmits a connection result indicating whether or not the connection with the sensor node has been established in step S6.

  Next, in step S <b> 8, the control unit 34 of the server 30 transmits a connection result response received from the GW 20. If the connection result is unsuccessful, the control unit 34 of the server 30 transmits a response to the GW 20 and then disconnects the connection with the GW 20.

  FIG. 3 is a diagram illustrating a sensor node control processing flow of the sensor network system 1 according to the present embodiment. This process starts after the start-up process of the sensor network system 1 described in FIG. 2 is completed and the connection between the GW 20 and the sensor node 10 is established. This processing is performed with the operation parameter set not to transmit the measurement result measured and detected by the sensor 12 to the GW 20, and the operation parameter set not to transmit the measurement result from the GW 20 to the server 30. The process ends when the parameter stored in the parameter storage unit 23 is changed.

  First, in step S <b> 11, the control unit 24 of the GW 20 transmits a measurement instruction to the sensor node 10. The measurement instruction is transmitted to the sensor node 10 at the measurement interval set in the operation parameter stored in the operation parameter storage unit 23.

  Next, in step S <b> 12, the control unit 11 of the sensor node 10 transmits the measurement result detected by the sensor 12 to the GW 20 in response to receiving the measurement instruction from the GW 20.

  Next, in step S <b> 13, the control unit 24 of the GW 20 stores the measurement result received from the sensor node 10 in the measurement result temporary storage unit 25.

  Next, in step S <b> 14, the control unit 24 of the GW 20 compares the measurement result received from the sensor node 10 with the situation determination threshold set in the operation parameter stored in the operation parameter storage unit 23. The measurement interval and the transmission interval are determined based on the determined situation and operation parameters. Details will be described with reference to FIG.

  Next, in step S15, the control unit 24 of the GW 20 determines the measurement interval determined in step S14 and the time from the transmission of the instruction to the sensor node 10 in step 11 to the reception of the measurement result in step S13. Based on this, the sleep time is determined, the determined sleep time is designated, and a sleep instruction for operating the sensor node 10 in the sleep mode is transmitted.

  Next, in step S <b> 16, the control unit 24 of the GW 20 determines whether it is time to transmit the measurement result stored in the measurement result temporary storage unit 25 to the server 30 to the server 30, that is, to the previous server 30. It is determined whether or not the transmission interval determined in step S14 has elapsed since the transmission of the measurement result. If it is time to transmit to the server 30, the process proceeds to step S17. If it is not time to transmit to the server 30, the process proceeds to step S18.

  Next, in step S <b> 17, the control unit 24 of the GW 20 transmits the measurement result stored in the measurement result temporary storage unit 25.

  Next, in step S18, the control unit 24 of the GW 20 determines whether or not the measurement interval determined in step S14 has elapsed from the previous transmission of the measurement instruction, that is, the transmission of the measurement instruction in step S11. If it is determined that the measurement interval has elapsed, the process returns to step S11. If it is determined that the measurement interval has not elapsed, the process returns to step S16.

  Next, in step S19, the control unit 11 of the sensor node 10 operates in the sleep mode and the sleep mode instructed from the GW 20.

  Next, in step S20, the control unit 11 of the sensor node 10 is activated after the sleep time instructed from the GW 20, and the process returns to step S12.

  FIG. 4 is a diagram illustrating a measurement result determination process flow of the sensor network system 1 according to the present embodiment.

  First, in step S41, the control unit 24 of the GW 20 determines the situation where the sensor 12 is placed based on the measurement result received from the sensor node 10 and the situation judgment threshold set in the operation parameter. .

  Next, in step S42, the control unit 24 of the GW 20 determines whether or not the situation determined in step S41 has changed from the previously determined situation. If it is determined that there is a change, the process proceeds to step S43. If it is determined that there is no change, the process ends. When there is no previously determined situation, it is determined that the situation has changed.

  Next, in step S43, the control unit 24 of the GW 20 determines the measurement interval and the transmission interval from the operation parameters based on the situation determined in step S42.

  Next, in step S44, the control unit 24 of the GW 20 issues a measurement instruction to the sensor node 10 at the measurement interval determined in step S43, and the measurement result of the server 30 at the transmission interval determined in step S43. Change settings to send.

  As described above, according to the present embodiment, the measurement result is transmitted from the sensor node 10 to the GW 20 according to the measurement instruction transmitted by the GW 20 to the sensor node 10 according to the operation parameter, so that the GW 20 communicates at the same time. It is possible to control the number of sensor nodes that perform and to reduce the processing load for receiving measurement results from the sensor nodes. As a result, it becomes possible to use a GW that is limited in power consumption, processing capacity, or memory capacity in the sensor network system, and it is also possible to use a general-purpose device for the GW. Further, when the sensor network system is started, the sensor node 10 to be connected from the server 30 receives the designated operation parameter, so that the GW 20 can connect to a different sensor node 10 every time the sensor network system is constructed. Therefore, a portable GW can be used as the GW 20.

  Furthermore, the measurement result can be detected from the sensor 12 at a predetermined constant interval, and the measurement interval can be prevented from shifting. Furthermore, since the measurement interval can be automatically changed according to the situation where the sensor 12 is placed, the needs of the user can be answered.

  The gateway of the present invention can be realized by recording the gateway processing on a computer-readable recording medium, causing the gateway to read and execute the program recorded on the recording medium. The computer system here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW (World Wide Web) system is used. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Sensor node 11 Control part 12 Sensor 13 Measurement result temporary storage part 14 Near field communication part 15 Battery 20 GW
21 Short-range Wireless Communication Unit 22 Communication Unit 23 Operation Parameter Storage Unit 24 Control Unit 25 Measurement Result Temporary Storage Unit 30 Server 31 Communication Unit 32 Input Unit 33 Display Unit 34 Control Unit 35 Measurement Result Storage Unit 36 Operation Parameter Storage Unit

Claims (8)

A gateway connected to a server via a network and connected to a plurality of sensor nodes via short-range wireless communication;
First communication means for performing near field communication with the sensor node;
Second communication means for communicating with the server via the network;
Said server of said plurality of sensor nodes setting the measurement interval of the sensors provided in each set of the destination gateway address information of the detected measurements by those the sensor, and the measurement result received from the plurality of sensor nodes An operation parameter storage means for receiving and storing an operation parameter including at least a setting of a transmission interval to the server from the server via the second communication means;
In measurement interval is set to the operating parameters stored in the operation parameter storage means, and to said sensor node via the first communication means before Symbol an instruction of transmission of measurement results with the measurement by the sensor send Te, according to the instruction at the transmission interval in which the sensor node is obtained through the pre-Symbol first communication means measurements obtained by driving the sensor, is set to the operating parameters, Control means for transmitting measurement results received from the plurality of sensor nodes to the server via the second communication means ;
With
Furthermore,
The operating parameter includes a setting of a situation determination threshold used to determine a situation where the sensor is placed, and the measurement interval of the operating parameter is set for each situation where the sensor is placed. ,
The control means determines the situation where the sensor is placed by comparing the measurement result acquired from the sensor node with the situation determination threshold, and determines the determined situation set in the operation parameter. At the measurement interval, an instruction for measurement by the sensor and transmission of the measurement result is transmitted to the sensor node via the first communication unit, and the sensor node drives the sensor according to the instruction. The gateway obtains the measurement result obtained through the first communication means .   In response to receiving the measurement result from the sensor node, the control means sleeps based on the measurement interval of the operation parameter and the time from the transmission of the instruction to the sensor node until the measurement result is received. 2. The gateway according to claim 1, wherein a time is determined, and the sensor node is operated in a sleep mode in which power consumption is suppressed for the determined sleep time. The operation parameter includes a setting of a transmission interval of measurement results received from the plurality of sensor nodes from the own device to the server for each situation where the sensor is placed,
The control means transmits the measurement results received from the plurality of sensor nodes to the server via the second communication means at a transmission interval of the determined situation set in the operation parameter. The gateway according to claim 1 or 2, characterized in. The operation parameter is transmitted from the server to the own device in response to the connection between the own device and the server and the connection between the own device and the plurality of sensor nodes being established. The gateway according to claim 1, wherein the gateway is stored in a storage unit. The gateway according to any one of claims 1 to 4, wherein the gateway is a portable electronic device. A sensor network system comprising a server, a gateway connected to the server via a network, and a plurality of sensor nodes connected to the gateway via short-range wireless communication,
The sensor node is
Sensor communication means for performing near field communication with the gateway;
A sensor that detects physical quantities and obtains measurement results;
Sensor control means for transmitting a measurement result obtained by driving the sensor in response to an instruction from the gateway to the gateway via the sensor communication means;
With
The server
Server communication means for communicating with the gateway via a network;
Setting of measurement intervals by sensors of each of the plurality of sensor nodes, setting of address information of transmission destination gateways of measurement results detected by the sensors, and measurement received from the plurality of sensor nodes from the gateway to the own device Server control means for transmitting an operation parameter including at least setting of a transmission interval of the result to the gateway via the server communication means;
Measurement result storage means for storing a measurement result received from the sensor node via the gateway;
With
The gateway is
First communication means for performing near field communication with the sensor node;
Second communication means for communicating with the server via the network;
Operational parameter storage means for receiving and storing the operational parameters from the server via the second communication means;
Through the first communication means, the sensor node is instructed to perform measurement by the sensor and transmission of the measurement result at the measurement interval set in the operation parameter stored in the operation parameter storage unit. In response to the instruction, the sensor node acquires the measurement result acquired by driving the sensor through the first communication unit, and the plurality of the measurement results are set at the transmission interval set in the operation parameter. Control means for transmitting the measurement result received from the sensor node to the server via the second communication means;
With
Furthermore,
The operating parameter includes a setting of a situation determination threshold used to determine a situation where the sensor is placed, and the measurement interval of the operating parameter is set for each situation where the sensor is placed. ,
The control means determines the situation where the sensor is placed by comparing the measurement result acquired from the sensor node with the situation determination threshold, and determines the determined situation set in the operation parameter. At the measurement interval, an instruction for measurement by the sensor and transmission of the measurement result is transmitted to the sensor node via the first communication unit, and the sensor node drives the sensor according to the instruction. The sensor network system is characterized in that the measurement result acquired in this way is acquired via the first communication means. A sensor control method in a gateway connected to a server via a network and connected to a plurality of sensor nodes via short-range wireless communication,
The gateway includes first communication means, second communication means, operation parameter storage means, and control means,
The operation parameter storage means sets the measurement interval of the sensor provided in each of the plurality of sensor nodes, sets the address information of the destination gateway of the measurement result detected by the sensor, and sends from the own device to the server A parameter storage step of receiving and storing an operation parameter including at least a setting of a transmission interval of measurement results received from the plurality of sensor nodes from the server via the second communication unit;
The control means instructs the sensor node to perform measurement by the sensor and send the measurement result to the sensor node at a measurement interval set in the operation parameter stored in the operation parameter storage means. A measurement instruction step of transmitting via one communication means;
A measurement result acquisition step for acquiring, via the first communication means, a measurement result acquired by the sensor node driving the sensor according to the instruction transmitted in the measurement instruction step;
A measurement result transmission step in which the control means transmits measurement results received from the plurality of sensor nodes to the server via the second communication means at a transmission interval set in the operation parameter;
Including
The operating parameter includes a setting of a situation determination threshold used to determine a situation where the sensor is placed, and the measurement interval of the operating parameter is set for each situation where the sensor is placed. ,
The measurement result acquisition step determines the situation where the sensor is placed by comparing the measurement result acquired from the sensor node with the situation determination threshold, and determines that the operation parameter is set. At the measurement interval of the situation, an instruction for measurement by the sensor and transmission of the measurement result is transmitted to the sensor node via the first communication unit, and the sensor node transmits the sensor in response to the instruction. A sensor control method characterized in that a measurement result obtained by driving is obtained via the first communication means . A program for causing a computer to execute a sensor control method in a gateway connected to a server via a network and connected to a plurality of sensor nodes via short-range wireless communication,
The gateway includes first communication means, second communication means, operation parameter storage means, and control means,
The operation parameter storage means sets the measurement interval of the sensor provided in each of the plurality of sensor nodes, sets the address information of the destination gateway of the measurement result detected by the sensor, and sends from the own device to the server A parameter storage step of receiving and storing an operation parameter including at least a setting of a transmission interval of measurement results received from the plurality of sensor nodes from the server via the second communication unit;
The control means instructs the sensor node to perform measurement by the sensor and send the measurement result to the sensor node at a measurement interval set in the operation parameter stored in the operation parameter storage means. A measurement instruction step of transmitting via one communication means;
A measurement result acquisition step for acquiring, via the first communication means, a measurement result acquired by the sensor node driving the sensor according to the instruction transmitted in the measurement instruction step;
A measurement result transmission step in which the control means transmits measurement results received from the plurality of sensor nodes to the server via the second communication means at a transmission interval set in the operation parameter;
Including
The operating parameter includes a setting of a situation determination threshold used to determine a situation where the sensor is placed, and the measurement interval of the operating parameter is set for each situation where the sensor is placed. ,
The measurement result acquisition step determines the situation where the sensor is placed by comparing the measurement result acquired from the sensor node with the situation determination threshold, and determines that the operation parameter is set. At the measurement interval of the situation, an instruction for measurement by the sensor and transmission of the measurement result is transmitted to the sensor node via the first communication unit, and the sensor node transmits the sensor in response to the instruction. A program for causing a computer to execute a measurement result obtained by driving through the first communication means.