JP2017011529A - Radio sensor network system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio sensor network system having an autonomous control mode, in which the radio sensor net work system can be controlled even in the event of a fault on a radio communication channel between radio equipment and a radio relay device, and a server fault.SOLUTION: A server 31 transmits, to control target equipment, control information to control each of control target equipment 27, 28, 29 by sensing information and set information, through a radio coordinator 11 and a radio device. The control target equipment stores the set information out of the control information received from the server. The radio device, when detecting a communication failure between with the radio coordinator, interrupts the radio transmission of the sensing information to the radio coordinator, and outputs a communication failure occurrence notification to the control target equipment. On receiving the communication failure occurrence notification, the control target equipment switches over to the autonomous control mode in which predetermined control operation is performed based on the set information stored in advance and the sensing information acquired from the sensing device.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a wireless sensor network system that performs wireless communication asynchronously.

In recent years, as a communication technology for smart meters, HEMS (Home Energy Management System) and BEMS (Building Energy Management System), wireless sensor network system of 920MHz band that can realize ultra-low power consumption, downsizing, and cost reduction has attracted attention. Has been.
The 920 MHz band is less attenuated due to radio wave propagation than the 2.4 GHz band and 5 GHz band used in wireless LAN (Local Area Network), etc., and is easy to get around obstacles. There is. Therefore, a network can be configured using a larger number of terminals as compared with the wireless LAN.

In the IEEE (The Institute of Electrical and Electronics Engineers Inc.) 802.15.4 standard, which is a short-range wireless network standard, basically, CSMA / CA (Carrier Sense Multiple Access / Collision Avoidance) Asynchronous access control method called “collision avoidance” control method is adopted. When the number of terminals is large, such as several hundred to several thousand, if communication is performed using a synchronous network system that is not a CSMA / CA access control system, it is difficult to set a schedule such as a superframe or a beacon.
Therefore, in a large-scale network, a CSMA / CA access control asynchronous network method is used. However, in the CSMA / CA access control network, access rights are acquired in consideration of collisions with other wireless devices, so that there is a problem that the delay time of data transmission cannot be guaranteed.

In a system with a small amount of control information such as a sensor network system, the overhead such as preamble and header becomes relatively large compared to the control information, and it is inefficient to transmit the control information individually to each wireless device. Become. Furthermore, there are cases where a limit is imposed on the transmission time per unit time, and in a large-scale network, it becomes difficult to individually transmit to all of a large number of wireless devices.
Therefore, in order to efficiently control a large number of wireless devices, the control information for each wireless device is packed from a wireless coordinator as a base unit using a multicast frame or a broadcast frame, and all of the wireless devices are broadcast in one frame. Techniques for transmitting are known.

However, when a plurality of wireless devices that have received a broadcast or multicast frame try to transmit packets that are data frames in response to notify that they have received correctly in order to improve communication reliability, Will cause a collision. For this reason, it is necessary to control the transmission of responses in consideration of packet response collisions with other wireless devices. However, in the case of a large-scale network with hundreds to thousands of terminals, the collision probability increases and collisions occur. If the packet is detected, it is necessary to retransmit the packet. Therefore, there is a problem that communication traffic increases and communication failure is likely to occur.
In relation to transmission in consideration of packet response collision with other wireless devices, Patent Document 1 obtains an offset time by which a plurality of sensor slave units shift their transmission timings, and shifts measurement data by the offset time. It is disclosed that the occurrence of communication failure is suppressed by wireless transmission. By using this method, it is possible to avoid communication collisions from a large number of sensor slave units and mitigate radio interference.

However, in the technique disclosed in Patent Document 1, control is performed when the wireless coordinator or the server does not operate normally, such as a battery out of the wireless coordinator that is the master unit, a radio wave failure, or a failure of the server that controls the wireless coordinator. There was a problem that the wireless device which is the target device could not be controlled.
The present invention has been made in view of the above. The purpose of the present invention is to connect a wireless device connected to a sensing device or a control target device and a server in a large-scale wireless sensor network system that performs asynchronous communication. In the wireless communication system in which information communication is performed with the wireless relay device, the control target device is controlled even when a wireless failure or a server failure occurs.

  In order to solve the above problems, the invention according to claim 1 is a control target device, a sensing device that acquires sensing information related to the control target device, a wireless device that outputs sensing information obtained from the sensing device, A wireless relay device that transmits / receives information to / from the wireless device, and the wireless relay device that is connected to the wireless relay device via a network, based on the sensing information and setting information related to the control target device set by application software And a server for controlling the device to be controlled, wherein the server transmits control information for controlling the device to be controlled based on the sensing information and the setting information to the wireless relay device, Transmitted to the control target device via the wireless device, the control target device from the server The setting information of the received control information is stored, and when the wireless device detects a communication failure with the wireless relay device, the wireless transmission of sensing information to the wireless relay device is interrupted. A communication failure occurrence notification is output to the control target device, and when the control target device receives the communication failure occurrence notification, the setting information stored in advance and the sensing information acquired from the sensing device, Based on the above, the mode is switched to a self-supporting control mode in which a predetermined control operation is performed.

  According to the present invention, in a wireless communication system in which information is communicated between a wireless device connected to a sensing device or a control target device and a wireless relay device connected to a server, control is performed even when a wireless failure or a server failure occurs. The target device can be controlled.

In the wireless sensor network system concerning the embodiment of the present invention, it is an outline figure showing an example of a star type network constituted by a wireless coordinator and a wireless device. It is a figure which shows an example of the sequence of a lighting control system in the wireless sensor network system which concerns on embodiment of this invention. It is a block diagram which shows an example of the hardware constitutions of the wireless device used for a wireless sensor network system. It is a block diagram which shows an example of the hardware of the illuminating device used for a wireless sensor network system. It is a figure which shows an example of the sequence in the time of starting of a lighting control system, and a normal control mode. It is a figure which shows the flow in the server at the time of schedule information update. (A), (b), (c) is a figure which shows an example of the schedule information transmitted to a lighting device from a server. It is the figure which showed an example of the sequence at the time of an illuminating device transfering from normal control mode to self-supporting control mode. It is the figure which showed the flow at the time of transfering from normal control mode to self-supporting control mode. It is the figure which showed the flow of the illumination control operation | movement at the time of a self-supporting control mode. It is the figure which showed the other example of the sequence at the time of an illuminating device transfering from normal control mode to self-supporting control mode. It is the figure which showed the other flow at the time of transfering from normal control mode to self-supporting control mode. In the wireless sensor network system which concerns on embodiment of this invention, it is the figure which showed the flow at the time of returning from independent control mode to normal control mode.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
The present invention relates to a large-scale wireless sensor network system that performs asynchronous communication in a wireless communication system in which a wireless device connected to a sensing device or a control target device and a wireless relay device connected to a server perform information communication. In order to control the control target device even when a radio failure or a server failure occurs, the following configuration is provided.
That is, the wireless sensor network system of the present invention includes a control target device, a sensing device that acquires sensing information related to the control target device, a wireless device that outputs sensing information obtained from the sensing device, and the wireless device. A wireless relay device that transmits and receives information between the wireless relay device and the wireless relay device via a network, and the control target based on the sensing information and setting information related to the control target device set by application software A wireless sensor network system including a server for controlling a device, wherein the server transmits control information for controlling the control target device based on the sensing information and the setting information to the wireless relay device and the wireless device. To the control target device, and the control target device The setting information of the received control information is stored, and the wireless device interrupts wireless transmission of sensing information to the wireless relay device when detecting a communication failure with the wireless relay device In addition, a communication failure occurrence notification is output to the control target device, and when the control target device receives the communication failure occurrence notification, the setting information stored in advance and the sensing information acquired from the sensing device And switching to a self-sustained control mode in which a predetermined control operation is performed.
With the above configuration, in a large-scale wireless sensor network system that performs asynchronous communication, a wireless device connected to a sensing device or a control target device and a wireless relay device connected to a server perform information communication. In a wireless communication system, it is possible to control a device to be controlled even when a wireless failure or a server failure occurs.

  In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably. Hereinafter, although this embodiment is described, this embodiment is not limited to the embodiment described below. A short-range wireless network in the 920 MHz band can automatically construct various networks such as a mesh type and a star type to perform stable communication. As an example, it is assumed to be a star type and will be described below. The embodiment will be described with reference to an example applied to a lighting control system as a wireless sensor network system.

FIG. 1 is a schematic diagram illustrating an example of a star network including one wireless coordinator and three wireless devices according to an embodiment of the present invention.
A wireless coordinator 11 as a wireless master device, wireless devices 13, 14, and 15 as wireless slave devices, sensing devices 21, 22, and 23 connected to the wireless devices 13, 14, and 15 by a signal line 17, and wireless devices Lighting devices 27, 28, and 29, which are control target devices connected to the devices 13, 14, and 15 through the signal line 18, and a server 31 that receives information from the wireless coordinator 11 and controls the control target devices.

FIG. 2 is a diagram showing an example of a sequence of the illumination control system shown in FIG.
Sensing information detected by the sensing device 21 is transmitted to the wireless device 13 connected by the signal line 17 (step S1), and wirelessly transmitted from the wireless device 13 to the wireless coordinator 11 (step S2). The wireless coordinator 11 transmits the sensing information received by wireless communication to the server 31 (step S3).
The server 31 determines the control operation of the lighting device 27 that is the control target device based on the input sensing information (step S4), and the determined control information is transmitted from the server 31 to the wireless coordinator 11 (step S5). Further, it is wirelessly transmitted from the wireless coordinator 11 to the wireless device 13 (step S6). The wireless device 13 that has received the control information from the server 31 transmits the control information to the lighting device 27 via the signal line 18 (step S7), and the lighting device 27 performs a predetermined operation based on the control information (step S7). S8).

Sensing information detected by the sensing devices 22 and 23 is also transmitted from the wireless devices 14 and 15 to the wireless coordinator 11, supplied from the wireless coordinator 11 to the server 31, and the lighting devices 28 and 29 are controlled in the same sequence as described above. Is done.
The sensing devices 21, 22, and 23 may be human sensors, for example. By using the human sensor, information that senses a person is transmitted from each sensing device 21, 22, 23 to the server 31 via the wireless devices 13, 14, 15 and the wireless coordinator 11. , 28 and 29 are output, and the control information is supplied to the lighting devices 27, 28 and 29 via the wireless coordinator 11 and the wireless devices 13, 14 and 15 to turn on the lighting devices. it can. Further, by using an illuminance sensor instead of the human sensor or together with the human sensor, it is also possible to control the lighting device according to the illuminance at the sensor installation location.

Furthermore, in the server 31, application software for performing device control based on sensing information and other input information is activated. The other input information is, for example, information from application software that sets a lighting control schedule according to time.
You can schedule lighting control according to the time with application software. During lunch breaks or when there are few people, even if people are detected by the presence sensor, the lighting is not turned on, or lighting equipment By setting a low dimming rate, unnecessary power consumption can be suppressed.
In the embodiment shown in FIG. 1, each of the lighting devices 27, 28, and 29 that are control target devices and the corresponding sensing devices 21, 22, and 23 are connected via the wireless devices 13, 14, and 15. Although connected by the signal lines 17 and 18, the control target device and the sensing device are integrally configured, and sensing information and control information are supplied from the wireless device to the control target device with the sensing device configured integrally. It may be configured as described above.

FIG. 3 is a block diagram illustrating an example of a hardware configuration of the wireless device.
Since the wireless devices 13, 14, 15 and the wireless coordinator 11 can adopt the same configuration when performing wireless communication, only the wireless device 13 will be described here.
The wireless device 13 includes a wireless module 40. The wireless module 40 includes a CPU (Central Processing Unit) 41 that controls the wireless device 13, and a memory 42 that stores software programs and data to be executed by the CPU 41 and provides a work area to the CPU 41.
The wireless module 40 includes a wireless circuit 43 for performing wireless communication and an antenna 44. In addition, the wireless module 50 receives an input of a power source or data acquired by a sensing device, controls the sensing device, or outputs data to a lighting device that is a control target device to control the lighting device. An external interface 45 is provided.

The memory 42 includes an EEPROM (Electrically Erasable Programmable Read Only Memory) 46 that stores setting information, a RAM (Random Access Memory) 47 that provides a work area to the CPU 41, and a flash memory 48 that stores received data and the like. I have.
The wireless device 13 transmits a response to the control data frame from the wireless coordinator 11 by executing the firmware of the CPU 41, and controls the wireless circuit 43 to acquire data from a sensor or the like and transmit it as a data frame. Can do.
The radio circuit 43 modulates a carrier wave, puts a data frame thereon, sends the data frame to the antenna 44, and wirelessly transmits from the antenna 44. The radio circuit 43 can receive the control data frame from the radio coordinator 11 via the antenna 44. The radio circuit 43 demodulates the carrier wave, extracts a control data frame, and sends the control data frame to the CPU 41 to execute processing such as transmission of the response and data acquisition.

FIG. 4 is a block diagram illustrating an example of hardware of a lighting device.
The lighting device includes a CPU 51, a memory 52, a power supply unit 53, an LED 54, a driver 55, a receiving unit 56, and a clock 57.
The memory 52 stores a control program for controlling the lighting device, data transmitted from the server 31, and the like, and the CPU 51 performs overall control of the lighting device based on the program stored in the memory 52. The driver 55 supplies the power supplied from the power supply unit 54 to the LED 54 that is a light emitting element according to the control from the CPU, and the receiving unit 56 receives a signal from the wireless device.

FIG. 5 is a diagram illustrating an example of a sequence when the lighting control system illustrated in FIG. 1 is activated and in the normal control mode.
In this sequence, a control sequence performed between the wireless device 13, the sensing device (human sensor) 21, the lighting device 27, the wireless coordinator 11, and the server 31 is shown. FIG. 6 shows a flow in the server 31 when the schedule information is updated.
First, when the lighting control system (operating system OS) of the server 31 is activated, the schedule information of the lighting control is transmitted from the server 31 to the lighting device 27 (steps S11, S12, S13). The lighting device 27 that has received the schedule information stores the information in the memory 52.
This schedule information is not used in the normal control mode, but is used when shifting to a self-sustained control mode described later. The schedule information updated in the same sequence is supplied to the lighting device 27 not only when the lighting control system of the server 31 is started but also when the lighting device control schedule information is updated by the application software on the server 31. The That is, the application software of the server 31 determines whether or not the schedule information has been updated (FIG. 6, step S20). If the schedule information has been updated (YES in FIG. 6 and step S20), the lighting device is switched to. Schedule information is transmitted (FIG. 6, step S21).

The normal control mode means a wireless control mode. Specifically, the sensing information acquired by the human sensor 21 is transmitted to the wireless device 13, the wireless coordinator 11, and the server 31. Control information representing the control operation of the device to be controlled is determined by application software that determines the control operation from the sensing information and schedule information, and the server 31 transmits the control information to the wireless coordinator 11, the wireless device 13, and the illumination. It means a control mode that is transmitted to the device 27 and operates the lighting device 27 according to the control information.
The independent control mode means a control mode in which a predetermined control operation is performed based on the setting information stored in advance acquired by the lighting device 27 from the server 31 and the sensing information acquired from the human sensor 21.

FIGS. 7A, 7 </ b> B, and 7 </ b> C are setting information set in the server 31, and are examples of schedule information transmitted from the server 31 to the lighting device 27.
The schedule information shown in FIG. 7A indicates that the lighting device is controlled at a dimming degree of 100% all day (24 hours) when the presence of the person is detected by the human sensor 21, and FIG. ) Is when the presence of the person is detected by the human sensor 21 and the time is between 0 o'clock and 12 o'clock, the dimming degree is set to 100%, and between 12 o'clock and 13 o'clock, the human sensor is used. Even if the presence of light is detected, the dimming degree is set to 0% (lights off), and the dimming degree is set to 100% from 13:00 to 24:00.
Furthermore, what is shown in FIG. 7C is a case where a human sensor and an illuminance sensor are used in combination, and the time zone when the presence of a person is detected by the human sensor and the room detected by the illuminance sensor. This indicates that the dimming degree is set on the basis of the brightness. Such schedule information, which is setting information, is transmitted to the lighting device 27 when the server system is activated, and is stored in the memory 52 of the lighting device.
Although the illuminance sensor output itself is a current value or the like, it is displayed in lux for convenience of explanation. In the case of the setting information shown in FIG. 7C, when the presence of the person is detected by the human sensor 21 as in FIG. 7A, the dimming degree is adjusted according to the output of the illuminance sensor throughout the day (24 hours). For example, the dimming level is set to 100% when it is dim at 500 lux or less, and the dimming level is set to 70% when brightness is detected such as 100 to 3000 lux. ing.

As described above, the setting information is transmitted from the server 31 to the lighting device not only when the server is started but also when the setting is changed.
For example, the schedule information transmitted to the lighting device 27 when the server is started is as shown in FIG. 7A, and then the setting is changed to the one shown in FIG. 7B on the server application software. The changed schedule information is transmitted from the server to the lighting device 27 at the time of update.
In this embodiment, all schedule information for one day is transmitted from the server 31 to the lighting device 27. However, only the information on the dimming degree is transmitted to the lighting device that is the control target device at the time when the dimming degree is changed. The lighting device 27 may be configured to store the information in the memory 52 when the information on the dimming degree is received, and to control the lighting device based on the information. For example, in the example shown in FIG. 7B, information with a dimming degree of 0% is transmitted from the server 31 to the lighting device 27 at 12:00, and information with a dimming degree of 100% is transmitted from the server 31 to the lighting device 27 at 13:00. The server 31 may control so as to.

Returning to FIG. 5 again, the normal control mode will be described.
In the normal control mode, sensing information sensed by the human sensor 21 is transmitted to the wireless device 13 connected by the signal line (step S31), and wirelessly transmitted from the wireless device 13 to the wireless coordinator 11 (step S32). ). When the wireless coordinator 11 successfully receives the sensing information by wireless communication, the wireless coordinator 11 transmits a wireless ACK packet for notifying the wireless device 13 of the successful reception (step S33).
Further, the wireless coordinator 11 outputs sensing information to the server 31 (step S34), and the server 31 determines the control operation of the control target device by application software that determines the control operation from the sensing information and schedule information (step S34). S35).
Here, when the schedule information shown in FIG. 7A is set in the server 31, the dimming degree of the lighting device 27 when a person is detected by the human sensor 21 is determined to be 100%. Control information having a luminous intensity of 100% is sent from the server 31 to the wireless coordinator 11 (step S36), and wirelessly transmitted from the wireless coordinator 11 to the wireless device 13 (step S37).
The wireless device 13 outputs a dimming degree of 100%, which is control information received by wireless communication, to the lighting device 27 that is a control target device (step S38), and the lighting device 27 sets the dimming to 100% according to the control information (step S39).

FIG. 8 shows a sequence when the lighting control system shown in FIG. 5 is started up and in the normal control mode, where radio interference occurs between the wireless device 13 and the wireless coordinator 11, and the lighting device changes from the normal control mode to the independent control mode. It is the figure which showed an example of the sequence at the time of transfering to.
Note that the sequence at the time of starting the server or updating the schedule information is the same as that shown in FIG.
First, in the normal control mode, sensing information sensed by the human sensor 21 is transmitted to the wireless device 13 connected by a signal line (step S41), and wirelessly transmitted from the wireless device 13 to the wireless coordinator 11 ( Step S42).

At this time, if a signal transmitted from the wireless device 13 is not received by the wireless coordinator 11 due to, for example, a failure of the wireless coordinator 11 or a radio wave failure, the wireless coordinator 11 does not transmit a wireless ACK packet for notifying the reception success, and wirelessly. The device 13 determines that transmission of sensing information has failed.
In addition, sensing information is transmitted from the wireless device 13 to the wireless coordinator 11, and the wireless device 13 receives the wireless ACK packet due to radio wave interference or the like even though the wireless coordinator 11 transmits the wireless ACK packet to the wireless device 13. If it is not possible, it is determined that transmission has failed.
The wireless device 13 that has determined that the transmission has failed retransmits the sensing information (step S43). If the wireless ACK packet is returned from the wireless coordinator 11, the wireless device 13 remains in the normal control mode.

On the other hand, if the wireless device 13 does not receive the wireless ACK packet from the wireless coordinator 11 even though it retransmits the sensing information, the wireless device 13 performs the retransmission a predetermined number of times (step S44). If the wireless device 13 cannot receive the communication, the wireless device 13 determines that communication cannot be performed due to a failure, interrupts transmission, and notifies the human sensor 21 and the lighting device 27 of the communication failure occurrence notification (step S45). The device 27 shifts to the self-sustained control mode.
The human sensor 21 and the lighting device 27 that have received the communication failure occurrence notification shift to the self-sustained control mode, and the sensing information in which the human sensor 21 detects the presence of a person is supplied to the lighting device 27 (step S46). The lighting device 27 adjusts the lighting device 27 using the schedule information received from the server when the server is started or the schedule information is updated, and the time information measured based on the signal supplied from the clock 57 and stored in the memory 52. Determine the luminous intensity.
For example, when the schedule information shown in FIG. 7A is supplied from the server 31 to the lighting device 27, or the schedule information shown in FIG. 7B is supplied from the server 31 to the lighting device 27, and the time information Is outside the time zone from 12:00 to 13:00, since the dimming degree is 100%, the dimming degree is controlled to 100% (step S47).

FIG. 9 is a diagram showing a flow when shifting from the normal control mode described above to the self-sustained control mode.
Note that the flowchart shown in FIG. 9 is convenient for the systematic operation of the wireless device 13 and the wireless coordinator 11 provided in the wireless sensor network system according to the embodiment of the present invention. It is for explanation. When the human sensor 21 detects a person while operating in the normal control mode (step S50), sensing information is transmitted from the human sensor 21 to the wireless device 13 (step S51), and the wireless device 13 transmits the wireless coordinator 11. Sensing information is transmitted to (step S52).
Thereafter, the wireless device 13 determines whether or not a wireless ACK packet has been received from the wireless coordinator 11 (step S53). If the wireless ACK packet is received (step S53, YES), the wireless device 13 operates in the normal control mode.
On the other hand, if the wireless device 13 does not receive the wireless ACK packet from the wireless coordinator 11 (NO in step S53), it is determined whether or not the number of reception failures of the wireless ACK packet is equal to or more than a predetermined number (three in the embodiment). If the number is less than the predetermined number (step S54, NO), the process returns to step S52 again, and the sensing information is transmitted from the wireless device 13 to the wireless coordinator 11 (step S52). If the number of reception failures of the wireless ACK packet is greater than or equal to the predetermined number (step S54, YES), a communication failure occurrence notification is output, and the process shifts to the autonomous control mode (step S55).

FIG. 10 is a diagram showing a flow of the illumination control operation in the self-supporting control mode described with reference to the sequence diagram shown in FIG. First, when the human sensor 21 detects the presence of a person (step S60), the sensing information is transmitted from the human sensor 21 to the lighting device 27 (step S61), and the lighting device 27 is determined by schedule information transmitted in advance. The dimming degree of illumination is set according to the dimming degree (step S62).
For example, if the schedule information shown in FIG. 7B is held and the current time is 10 o'clock, the lighting dimming degree is set to 100%, and if the current time is 12:30 Sets the dimming degree of the illumination to 0%.

11 shows another sequence when the lighting control system shown in FIG. 5 is activated and in the normal control mode, when a failure occurs in the server 31 and the lighting device shifts from the normal control mode to the independent control mode. It is the figure which showed the example.
Note that the sequence at the time of starting the server or updating the schedule information is the same as that shown in FIG.
First, sensing information sensed by the human sensor 21 in the normal control mode is transmitted to the wireless device 13 connected by the signal line (step S71), and wirelessly transmitted from the wireless device 13 to the wireless coordinator 11 (step S71). S72). The wireless coordinator 11 transmits a wireless ACK packet for notifying successful reception to the wireless device 13 (step S73) and transmits the sensing information received from the wireless device 13 to the server 31 (step S74).

At this time, if a failure has occurred in the server 31 (step S75), no control information is output from the server 31, and therefore no control information is returned from the wireless coordinator 11.
Therefore, after receiving the wireless ACK packet from the wireless coordinator 11, the wireless device 13 receives the control information even if control information is not transmitted from the wireless coordinator 11 within a predetermined time, that is, even when waiting for reception for a predetermined time. If not (step S76), it is determined that a failure has occurred in one or both of the server 31 and the wireless coordinator 11, and a communication failure occurrence notification is output to the human sensor 21 and the lighting device 27 (step S77). The sensation sensor 21 and the lighting device 27 shift to the self-supporting control mode.

The human sensor 21 and the lighting device 27 that have received the communication failure occurrence notification shift to the self-sustained control mode, and the sensing information in which the human sensor 21 detects the presence of a person is supplied to the lighting device 27 (step S78). The lighting device 27 uses the schedule information received from the server when the server is activated or the schedule information is updated, and the time information that is timed based on the signal supplied from the clock 57, and the like. Determine the dimming level.
For example, when the schedule information shown in FIG. 7A is supplied from the server 31 to the lighting device 27, or the schedule information shown in FIG. 7B is supplied from the server 31 to the lighting device 27, and the time information Is outside the time zone from 12:00 to 13:00, since the dimming degree is 100%, the dimming degree is controlled to 100% (step S79).

FIG. 12 is a diagram showing another flow when shifting from the normal control mode described with reference to the sequence diagram shown in FIG. 11 to the self-sustained control mode.
In the flowchart shown in FIG. 12, the wireless device 13, the wireless coordinator 11, and the server 31 provided in the wireless sensor network system according to the embodiment of the present invention cooperate to perform systematic operations. This is for convenience. In FIG. 12, the predetermined reception waiting time of the wireless device 13 in FIG. 11 is assumed to be 1 minute.
First, when the human sensor 21 detects a person while operating in the normal control mode (step S80), sensing information is transmitted from the human sensor 21 to the wireless device 13 (step S81). Sensing information is transmitted to the coordinator 11 (step S82).
Thereafter, the wireless device 13 determines whether or not a wireless ACK packet is received from the wireless coordinator 11 (step S83). If the wireless ACK packet is received (YES in step S83), the wireless device 13 is a server for 1 minute. It is determined whether or not the control information from 31 has been received (step S84). When the wireless device 13 has received control information from the server 31 within 1 minute (step S84, NO), the wireless device 13 operates in the normal control mode.

If the wireless device 13 does not receive a wireless ACK packet from the wireless coordinator 11 (NO in step S83), it is determined whether or not the number of reception failures of the wireless ACK packet is equal to or greater than a predetermined number (three in the embodiment) ( In step S85), when the number is less than the predetermined number (step S85, NO), the process returns to step S82 again, and the sensing information is transmitted from the wireless device 13 to the wireless coordinator 11 (step S82).
If the number of reception failures of the wireless ACK packet is equal to or greater than the predetermined number (three in the embodiment) (YES in step S85), a communication failure occurrence notification is output and the process shifts to the self-sustained control mode (step S86).
Also, when the wireless device 13 has not received control information from the server 31 for one minute (YES in step S84), the wireless device 13 shifts to the self-sustained control mode (step S86).

  In the case of the present embodiment, the number of receptions of the wireless ACK packet received from the wireless coordinator 11 is set to 3 times, and the waiting time for receiving control information from the wireless coordinator 11 to the wireless device 13 is set to 1 minute. It is preferable to transmit the sensing information from the wireless device 11 to the wireless coordinator 11 so that the number of receptions of the wireless ACK packet is three times or more. However, the present invention is not limited to this. If the failure can be detected, the number of receptions of the wireless ACK packet, the reception timing, and the control information reception waiting time in the wireless device 13 may be set as appropriate.

  FIG. 13 is a diagram showing a flow when returning from the autonomous control mode to the normal control mode in the wireless sensor network system according to the embodiment of the present invention. When the wireless device 13 receives some wireless data (control information here) from the wireless coordinator 11 during the self-sustained control mode (step S90, YES), the wireless device 13 determines that the failure has been recovered, and causes the human sensor 21 and the lighting device 27 to The human sensor 21 and the lighting device 27 return to the normal control mode.

In the above-described embodiment, the wireless device 13, the human sensor 21 that is a sensing device, and the lighting device 27 that is a control target device have been described, but the same sequence flow is also applied to other wireless devices, sensing devices, and control target devices. Processing is performed.
The connection between the wireless coordinator 11 and the server 31 has been described with reference to an example using wireless. However, the wireless coordinator 11 and the server 31 may be configured to be connected by wire. Communication failure occurrence notification is output to the device, but the control target device has a driver for the sensing device, outputs the communication failure occurrence notification only to the control target device, and the control target device includes the sensing device and controls in the independent control mode. It may be configured.
In addition, the wireless device, the sensing device, and the control target device are connected via a signal line. However, the wireless device may be connected wirelessly, and the sensing device and the control target device may have a wireless communication function so that the sensing device and the control target device are connected. The device may be configured to directly communicate with the wireless coordinator.
Alternatively, either a sensing device or a control target device is provided with a wireless communication function, and a sensing device or control target device having a wireless communication function and a device or device that does not have a wireless communication function are connected by a signal line, and wireless You may comprise so that the device or apparatus which has a communication function may be directly communicated with a radio coordinator.

<Configuration, operation and effect of exemplary embodiment of the present invention>
<First aspect>
The wireless sensor network system according to this aspect includes control target devices 27, 28, and 29, sensing devices 21, 22, and 23 that acquire sensing information related to the control target devices, and sensing information obtained from the sensing devices 21, 22, and 23. Is connected to the wireless coordinator 11 that transmits and receives information between the wireless devices 13, 14, and 15, and the wireless device via the network, and is set by sensing information and control set by application software A wireless sensor network system including a server 31 that controls the control target devices 27, 28, and 29 based on setting information related to the target devices 27, 28, and 29, and the server 31 is controlled by sensing information and setting information To control the target devices 27, 28, 29 The control information is transmitted to the control target devices 27, 28, and 29 via the wireless coordinator 11 and the wireless device. The control target devices 27, 28, and 29 store the setting information in the control information received from the server 31, and When the device 13, 14, 15 detects a communication failure with the wireless coordinator 11, the device 13, 14, 15 interrupts wireless transmission of sensing information to the wireless coordinator 11 and sends a communication failure occurrence notification to the control target devices 27, 28, The control target devices 27, 28, and 29 receive the communication failure occurrence notification, based on the setting information stored in advance and the sensing information acquired from the sensing devices 21, 22, and 23. It is characterized by switching to a self-supporting control mode in which a predetermined control operation is performed.

According to this aspect, the server 31 transmits control information for controlling the control target devices 27, 28, and 29 to the control target devices 27, 28, and 29 via the wireless coordinator 11 and the wireless device based on the sensing information and the setting information. The control target devices 27, 28, and 29 store the setting information of the control information received from the server 31, and the wireless devices 13, 14, and 15 detect a communication failure with the wireless coordinator 11. In this case, wireless transmission of the sensing information to the wireless coordinator 11 is interrupted, and a communication failure occurrence notification is output to the control target devices 27, 28, and 29. The control target devices 27, 28, and 29 Is received based on the setting information stored in advance and the sensing information acquired from the sensing devices 21, 22, and 23. There are switched to the autonomous control mode for performing a predetermined control operation.
Thereby, even when a radio failure or a server failure occurs, the controlled devices 27, 28, and 29 can operate in the self-sustained control mode.

<Second aspect>
In the wireless sensor network system of this aspect, the sensing devices 21, 22, and 23 are human sensors or illuminance sensors, or human sensors and illuminance sensors, and the control target devices 27, 28, and 29 are configured by lighting devices. Features.
According to this aspect, since the sensing devices 21, 22, and 23 are the human sensor or the illuminance sensor, or the human sensor and the illuminance sensor, and the control target devices 27, 28, and 29 are configured by the lighting device, a communication failure occurs. Even if it occurs, the lighting device performs a predetermined control operation based on the setting information stored in advance and the sensing information acquired from the human sensor and the illuminance sensor when the communication failure occurrence notification is received. The device can be switched to the independent control mode. Thus, when a person is detected, the lighting device can be controlled to set the dimming degree, and by using the illuminance sensor, the dimming degree of the lighting device can be set according to the illuminance in the room where the sensing device is arranged. Can be set.

<Third aspect>
In the wireless sensor network system of this aspect, the setting information stored in the devices to be controlled 27, 28, and 29 includes illumination control schedule information set at each time.
According to this aspect, the setting information stored in the control target devices 27, 28, and 29 includes the lighting control schedule information set at each time, so that the lighting control according to the time zone can be performed. .
Thereby, it is possible to set the dimming degree of the lighting device according to the time zone. For example, even in the time zone such as a lunch break, even if a person is detected, the dimming level can be set low to contribute to energy saving.

<4th aspect>
In the wireless sensor network system according to this aspect, the condition for the wireless device to detect a communication failure is that the number of sensing information transmission failures exceeds a predetermined number.
According to this aspect, since the condition for the wireless device to detect a communication failure is that the number of sensing information transmission failures exceeds a predetermined number, communication is performed using the number of transmission failures that are affected by the occurrence of a radio interference or the like. A failure can be detected.
As a result, even if a radio wave interference or the like temporarily occurs between the wireless device 13 and the wireless coordinator 11, if the number of transmission failures is within a predetermined number, the normal control mode is maintained and the predetermined number of times is exceeded. Can be switched to the independent control mode.

<5th aspect>
In the wireless sensor network system of this aspect, the condition for the wireless device to detect a communication failure is that the wireless device has successfully transmitted the sensing information to the wireless coordinator 11 and the control information from the wireless coordinator 11 is within a predetermined time. It is not received.
According to this aspect, the condition for the wireless device to detect a communication failure is that the wireless device has successfully transmitted sensing information to the wireless coordinator 11 and control information from the wireless coordinator 11 is not received within a predetermined time. Therefore, it is possible to detect a communication failure based on a state determination of reception failure within a predetermined time that is affected by the occurrence of a radio interference or the like.
As a result, even when the wireless coordinator is operating normally, the control information can be switched to the autonomous control mode even when the control information is not transmitted due to a server failure.

<Sixth aspect>
The wireless sensor network system according to this aspect controls the wireless signal reception notification when the wireless device receives any wireless signal from the wireless coordinator 11 while the control target devices 27, 28, and 29 are operating in the self-sustained control mode. The target devices 27, 28, and 29 are notified, and the sensing device and the control target devices 27, 28, and 29 are switched from the self-sustained control mode to the normal control mode.
According to this aspect, when the wireless device receives any wireless signal from the wireless coordinator 11, the control target devices 27, 28, and 29 that have received the wireless signal reception notification can switch from the independent control mode to the normal control mode. .
As a result, when the wireless coordinator fails or has a radio wave failure or server failure, and the controlled device is operating in the autonomous control mode, the wireless device receives any wireless signal from the wireless coordinator, and the failure is repaired. Alternatively, it is possible to determine that the failure has been recovered and return to the normal control mode.

As described above, according to the present invention, when a failure occurs in the wireless communication path between the wireless device and the wireless coordinator, or when a failure occurs in the server, the control target device controls autonomously. In addition, a wireless sensor network system capable of reducing power consumption can be obtained.
As mentioned above, although embodiment of this invention has been described so far, embodiment of this invention is not limited to embodiment mentioned above. That is, other embodiments, additions, changes, deletions, and the like can be changed within the scope that can be conceived by those skilled in the art, and as long as the effects of the present invention are exhibited in any aspect, the scope of the present invention is included. It is included.
As described above, according to the present invention, in a wireless sensor network using an asynchronous communication system, a wireless failure between a wireless slave device or a wireless master device or a failure in a server to which the wireless master device is connected. It is possible to obtain a network system in which a control target device connected to a wireless slave device can be controlled even when it occurs.

DESCRIPTION OF SYMBOLS 11 ... Wireless coordinator (wireless relay device) 13, 14, 15 ... Wireless device (wireless device), 17, 18 ... Signal line, 21, 22, 23 ... Sensing device (sensing device) (human sensor, illuminance sensor) , 27, 28, 29 ... controlled devices (lighting devices), 31 ... server, 40 ... wireless module, 41, 51 ... CPU, 42, 52 ... memory, 43 ... wireless circuit, 44 ... antenna, 45 ... external interface, 46 ... EEPROM, 47 ... RAM, 48 ... flash memory, 53 ... power supply, 54 ... LED, 55 ... driver, 56 ... receiver, 57 ... clock

JP 2014-107762 A

Claims (6)

Control target equipment,
A sensing device for obtaining sensing information relating to the control target device;
A wireless device that outputs sensing information obtained from the sensing device;
A wireless relay device that transmits and receives information to and from the wireless device;
A wireless sensor network comprising: a server that is connected to the wireless relay device via a network, and that controls the control target device based on the sensing information and setting information related to the control target device set by application software; A system,
The server transmits control information for controlling the control target device based on the sensing information and the setting information to the control target device via the wireless relay device and the wireless device,
The device to be controlled stores the setting information of the control information received from the server,
When the wireless device detects a communication failure with the wireless relay device, the wireless device interrupts wireless transmission of sensing information to the wireless relay device, and outputs a communication failure occurrence notification to the control target device,
When the control target device receives the communication failure occurrence notification, the control target device switches to an autonomous control mode in which a predetermined control operation is performed based on the setting information stored in advance and the sensing information acquired from the sensing device. A wireless sensor network system. The sensing device is a human sensor, or a human sensor and an illuminance sensor,
The wireless sensor network system according to claim 1, wherein the control target device is a lighting device.   The wireless sensor network system according to claim 1, wherein the setting information stored in the control target device includes illumination control schedule information set at each time.   The wireless sensor network system according to claim 1, wherein the condition for detecting a communication failure by the wireless device is that the number of failed transmissions of sensing information exceeds a predetermined number.   The condition for the wireless device to detect a communication failure is that the wireless device has successfully transmitted sensing information to the wireless relay device, and control information from the wireless relay device is not received within a predetermined time. The wireless sensor network system according to claim 1.   When the wireless device receives any wireless signal from a wireless relay device while the controlled device is operating in the autonomous control mode, the wireless device receives a wireless signal reception notification to the controlled device, and the sensing device and control The wireless sensor network system according to claim 1, wherein the target device is switched from the self-sustained control mode to the normal control mode.

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