JP4853046B2 - Sensor network system - Google Patents

Description

The present invention relates to a sensor network system that performs environmental management by controlling operation of a controlled device such as an air conditioner by a management computer based on temperature and humidity information measured by a sensor wireless tag installed at each position in a room.

An environment management system that manages the environment of a room or the like controls the operation of a heating device, a cooling device, an air conditioner, or the like by a management computer based on temperature and humidity information measured by sensors installed in various places in the room. It shall be maintained at predetermined environmental conditions. In the environment management system, a system is also proposed in which each sensor and a management computer are connected wirelessly to exchange measurement information.

Patent Document 1 includes a plurality of transmission terminals each including only a wireless transmission unit, and one reception terminal including a plurality of wireless reception units in which different reception frequencies are set. Between each transmission terminal and the reception terminal, There has been proposed an environment management system that transmits and receives information at a predetermined frequency assigned in (1). In such an environment management system, the receiving terminal identifies from which transmitting terminal the received information is transmitted based on the frequency information, and is automated.
JP 2005-51557 A

Since the environment management system disclosed in Patent Document 1 described above automatically identifies a large number of transmission terminals based on frequency information, the cost and size of the transmission terminals are increased compared to a communication system employing a polling method. Can be suppressed. However, in such an environment management system, for example, when changing the installation position of each transmission terminal in order to change the measurement position, a process for registering the changed position with respect to the reception terminal is required.

In such an environment management system, there is a problem that a person in charge of the system is required in order to perform a process of re-inputting the change position of the transmission terminal to the system software, and it takes time and effort. Therefore, in such an environmental management system, the system can be simplified, but the system operation such as changing the installation position of the transmission terminal to the optimum position in the process of operating the system after the initial setting is troublesome.

The present invention relates to a sensor network system in which indoor environmental adjustment is performed by measuring environmental conditions such as temperature and humidity with a sensor wireless tag installed indoors and transmitting the measured environmental conditions to a management computer. This has been proposed for the purpose of providing a sensor network system that can be realized.

A sensor network system according to the present invention that achieves the above-described object is installed at a predetermined position in a room, and a management computer having a wireless tag reader function that outputs a predetermined control signal to a controlled apparatus such as an air conditioner. A plurality of sensor wireless tags and a plurality of light emitting devices arranged in a predetermined state such as a matrix on the ceiling. In the sensor network system, each sensor wireless tag includes an antenna unit and a high-frequency signal processing unit that perform wireless connection with a management computer, a photosensor unit that receives illumination light, and illumination light received by the photosensor unit. A frequency component discriminating unit that discriminates a frequency component, an environmental measurement sensor unit that measures a predetermined environmental state, a memory unit that stores identification information given from a management computer, and a control unit that performs a control operation of each component Is provided.
In the sensor network system, each light-emitting device has a light-emitting body and a frequency converter such as an inverter that is set so that emitted light of a predetermined frequency component determined in advance by the management computer according to the installation position in the room is emitted from the light-emitting body. And the installation position is registered in the management computer.

In the sensor network system, each sensor wireless tag installed at a predetermined position in the room receives the emitted light emitted from the light emitting device and discriminates its frequency component by the frequency component discriminating unit to the management computer. The frequency component discrimination information is wirelessly output. In the sensor network system, the management computer identifies and registers the installation position of each sensor wireless tag based on the frequency component discrimination information, and gives identification information to the sensor wireless tag. In the sensor network system, each sensor wireless tag measures an environmental state such as temperature and humidity at the installation position by the environmental measurement sensor unit, and wirelessly outputs the measurement information together with the assigned identification information to the management computer. In the sensor network system, the management computer grasps the environmental state at each position in the room and outputs a control signal to the controlled device to operate it.

In the sensor network system, there is a case where a system operation is performed in which an arbitrary sensor wireless tag is moved to an appropriate position as necessary after initial setting and an environmental state at the position is measured. In the sensor network system, the sensor wireless tag moved by the identification information received by the management computer is identified, and the moving position of the sensor wireless tag is identified by the frequency component discrimination information. Therefore, in the sensor network system, even when the sensor wireless tag is moved to an appropriate position, the system registration process is not required.

In the sensor network system according to the present invention, an active wireless tag incorporating a power source is used as a sensor wireless tag. In the sensor network system according to the present invention, a passive wireless tag using a wireless output from a management computer as driving energy is used as the sensor wireless tag.

According to the sensor network system according to the present invention configured as described above, the installation position of the sensor wireless tag is specified by using the light-emitting device that is fixedly installed. Even if the sensor wireless tag is moved to an appropriate position, the changed position is automatically identified by the identification information and the frequency component determination information transmitted from the sensor wireless tag to the management computer. Therefore, according to the sensor network system, a dedicated system administrator is not required, and it is possible to carry out highly accurate environmental management by a simple response to move the sensor wireless tag.

Hereinafter, a sensor network system 1 shown as an embodiment of the present invention will be described in detail with reference to the drawings. In the sensor network system 1, environmental conditions such as temperature and humidity in the room 3 of the building 2 are automatically measured at a predetermined timing at arbitrary many points. In the sensor network system 1, the operation of the controlled device 4 such as a heating device, a cooling device, an air conditioning device, or a humidifying device is automatically controlled based on the measurement result, so that the room 3 in the building 2 is always at the optimum temperature and humidity. To be set to the environmental state.

As shown in FIG. 1, the sensor network system 1 includes a management computer 5 and a room 3
A large number of sensor wireless tags 6A to 6M (hereinafter collectively referred to as sensor wireless tags 6 unless otherwise described individually) installed at each measurement point, and arranged in a matrix, for example, on the ceiling of the room 3 And a large number of lighting devices 7A to 7N (hereinafter collectively referred to as the lighting device 7 unless otherwise described). Sensor network system 1
, The temperature of each position measured by each sensor wireless tag 6 as will be described in detail later.
The humidity information is read by the management computer 5 having a wireless tag reader function, and a control signal is output from the management computer 5 to the controlled device 4 to control its operation. Of course, the sensor network system 1 may control a plurality of controlled devices 4 by a single management computer 5.

In the sensor network system 1, the management computer 5 and the sensor wireless tag 6 are wirelessly connected using an appropriate 1-to-M short-range wireless communication system. In the sensor network system 1, not only the management computer 5 and the sensor wireless tag 6 are directly connected by radio, but also when managing the environment of a large room or multiple floors or depending on the carrier frequency characteristics, for example, via a relay function. Wireless connection. Sensor network system 1
In this case, a relay antenna is installed at an appropriate position in the room, and the relay antenna and the management computer 5 are connected wirelessly or by wire, and the relay antenna and each sensor wireless tag 6 are wirelessly connected. .

The management computer 5 has a transmission / reception function based on the wireless communication method described above, and receives measurement information transmitted from each sensor wireless tag 6 by giving a measurement instruction to the sensor wireless tag 6 as described later. As will be described later, the management computer 5 includes an installation position / frequency allocation table that defines each illumination device 7 installed at each position so that each illumination light is emitted with different frequency components f1 to fn. . In the management computer 5, frequency component information (described later) transmitted from each sensor wireless tag 6 is identified based on the installation position / frequency allocation table, and identification information (ID information) is given to each sensor wireless tag 6. . Also,
As will be described later, the management computer 5 outputs a control signal instructing each sensor wireless tag 6 to measure temperature and humidity. In the management computer 5, ID information attached to measurement information transmitted from each sensor wireless tag 6 is identified, and temperature / humidity measurement information at a position where each sensor wireless tag 6 is installed based on this ID information. Get.

The sensor wireless tag 6 is a wireless tag used in RFID (Radio Frequency Identification) technology that wirelessly transmits and receives predetermined information from a tag in which ID information is embedded, and wirelessly communicates with the management computer 5 by the wireless communication method described above. Send and receive predetermined information. The sensor wireless tag 6 has an external specification such as a card type or a label type in which an IC chip having a predetermined function is mounted on the base body, and is attached to each position in the room as shown in FIG. Installed. The sensor wireless tag 6 can be peeled off from a desk or equipment provided in the room with an adhesive tape or the like, and can be installed at an appropriate position.

As shown in FIGS. 2 and 3, the sensor wireless tag 6 includes a control unit 8 that controls the operation of each component.
And an antenna unit 9 that exchanges radio signals with the management computer 5, a high-frequency signal processing unit 10 that processes radio signals transmitted and received by the antenna unit 9, and a memory unit 11 that stores predetermined information and the like. I have. The sensor wireless tag 6 includes a photosensor unit 12 that receives illumination light emitted from the illumination device 7, and a frequency filter that determines a distribution state of a predetermined frequency, for example. The frequency of illumination light received by the photosensor unit 12 A frequency component determination unit 13 that determines the component f and outputs frequency component determination information to the control unit 8 is provided.

The sensor wireless tag 6 includes a temperature / humidity sensor unit 14 that measures the temperature and humidity of the installation location as a sensor function. The temperature / humidity sensor unit 14 measures temperature and humidity based on the measurement instruction signal output from the control unit 8, and outputs measurement information to the control unit 8. The sensor wireless tag 6 is a so-called active tag that includes a power supply unit 15 having a battery serving as a self-power source, and that operates each component by supplying power from the power supply unit 15 to each component. .

The illuminating device 7 is composed of a light emitter 16 composed of a fluorescent lamp and a frequency converter 17 attached to the light emitter 16 and superposing different frequency components f on the emitted light. In the lighting device 7, the frequency conversion unit 17 sets the power frequency (50 Hz or 60 Hz) to 20,000 Hz.
It is configured by an inverter that reduces “flickering” of the light emitter 16 by converting to 50,000 Hz. In the illumination device 7, the frequency conversion unit 17 is adjusted based on the installation position / frequency allocation table set in advance by the management computer 5 according to the installation position as described above, and the emitted light emitted from the light emitter 16 is emitted. It is set to have a predetermined frequency component f.
As a result, the installation positions of the illumination device 7 are registered in the management computer 5.

In the sensor network system 1 configured as described above, an initial setting operation for setting the frequency component f of each lighting device 7 is performed as shown in FIG. In the sensor network system 1, each of the light emitters 16 provided with the frequency conversion unit 17 is installed in a fixture provided on the ceiling (s-1). In the sensor network system 1, the installation position / frequency allocation table is read from the management computer 5 (s-2). In the sensor network system 1, an adjustment operation of the frequency conversion unit 17 is performed based on the installation position / frequency allocation table, and each light emitter 16 has a specific frequency component f so as to emit light. The frequency component setting operation for setting the frequency component f is performed (s-3).

In the sensor network system 1, when the frequency component setting operation in each lighting device 7 described above is completed, a frequency component setting completion report is sent to the management computer 5 (s-4). In the sensor network system 1, this setting completion report is performed, for example, by an operation of clicking the “setting of lighting device” icon displayed on the screen of the management computer 5, and each lighting device is selected in the management computer 5 based on this click operation. 7 performs a lighting device registration process for assigning a unique frequency component f to 7 and a registration process by assigning an ID to each lighting device (s-5).

In the sensor network system 1, each lighting device 7 is attached to a lighting fixture arranged in a matrix on the ceiling, so that a fixed frequency component f is assigned to each lighting device 7. Become. Each lighting device 7 includes a frequency conversion unit 17.
Is provided on the side of the instrument, and therefore the operation of readjusting the frequency component f when replacing the light emitter 16 becomes unnecessary. Therefore, in the sensor network system 1, after performing the initial setting operation described above, the adjustment operation and the system registration operation regarding each lighting device 7 are not required, and anyone can easily perform the replacement work of the light emitters 16. And In the sensor network system 1, the above-described initial setting operation is required when the mounting position of the lighting fixture on the ceiling is significantly changed.

In the sensor network system 1, as an initial setting operation, a sensor wireless tag 6 is installed at each measurement point in the room 3 shown in FIG. Processing to register is performed. In the sensor network system 1, the sensor wireless tags 6 are respectively attached to a desk or equipment provided in the room 3 (t−1). In the sensor network system 1, when the operation of installing the sensor wireless tag 6 at an appropriate position is completed, an installation completion report is sent to the management computer 5 (t-2). Note that this installation completion report is also made by, for example, clicking on the “install sensor wireless tag” icon displayed on the screen of the management computer 5.

In the sensor network system 1, a sensor wireless tag registration process for registering each sensor wireless tag 6 with identification information (sensor wireless tag ID) in the management computer 5 based on the installation completion report of the sensor wireless tag 6. Is performed (t-3). This sensor wireless tag registration process is simply performed by applying the sensor wireless tag I to each sensor wireless tag 6 installed in the room 3.
This is a process of registering with D and not a process of registering in which position in the room 3 each sensor wireless tag 6 is installed.

In the sensor network system 1, when the registration process described above is completed, the sensor wireless tag I assigned to each sensor wireless tag 6 from the management computer 5 individually.
D is notified (t-4). In the sensor network system 1, when each sensor wireless tag 6 receives the sensor wireless tag ID information transmitted wirelessly from the management computer 5, a predetermined reception process is performed and a process of registering in the memory unit 11 is performed (t -5).

In the sensor network system 1, after the sensor wireless tag ID registration process in each sensor wireless tag 6 described above is completed, the installation position of each sensor wireless tag 6 installed in the room 3 as shown in FIG. The initial setting operation to be registered in is performed. In the sensor network system 1, a process of registering the installation position of each sensor wireless tag 6 in the management computer 5 is performed in a state where all the lighting devices 7 provided in the room 3 are lit (t-6). In the sensor network system 1, each illumination device 7 emits illumination light having a different frequency component f as described above, and each sensor wireless tag 6 receives this illumination light by the photosensor unit 12 (t−). 7).

In the sensor network system 1, each sensor wireless tag 6 discriminates the frequency component f included in the illumination light received by the frequency component discriminating unit 13 and outputs frequency component discriminating information to the control unit 8 (t−). 8). In the sensor network system 1, the illumination devices 7 installed at different positions as described above emit illumination light having different frequency components f, so that the sensor wireless tags 6 installed at different positions are used. However, the control unit 8 generates different frequency component discrimination information.

In the sensor network system 1, each sensor wireless tag 6 outputs the frequency component information generated by the control unit 8 based on the frequency component-specific information output from the frequency component determination unit 13 to the high-frequency signal processing unit 10. The frequency component information subjected to the high frequency signal processing in the high frequency signal processing unit 10 is wirelessly output to the management computer 5 via the antenna unit 9 (t−
9). In the sensor network system 1, at this time, each sensor wireless tag 6 reads the registered sensor wireless tag ID from the memory unit 11, attaches it to the frequency component information, and wirelessly outputs it to the management computer 5.

In the sensor network system 1, the management computer 5 receives the sensor wireless tag ID and the frequency component information wirelessly output from the sensor wireless tag 6 (t-1).
0). In the sensor network system 1, the target sensor wireless tag 6 is identified from the information received by the management computer 5 based on the sensor wireless tag ID, and the frequency component information is compared with the installation position / frequency allocation table. Sensor wireless tag 6
Is identified (t-11). In the sensor network system 1, the management computer 5 registers each sensor wireless tag 6 by associating the information on the installation position with the sensor wireless tag ID (t-12).

In the sensor network system 1, the initial setting operation is completed by the series of operations described above. In the sensor network system 1, for example, each process has only to be performed according to the procedure displayed on the management computer 5, and since it is a simple task, an initial setting operation can only be performed by a dedicated system administrator. Not. In the sensor network system 1, for example, by adjusting system software such as adjustment of discrimination sensitivity in the frequency component discrimination unit 13 of each sensor wireless tag 6, adjustment of frequency component information and installation position / frequency allocation table, etc. Since it is possible to construct an environmental management system with a high level, it is preferable that the system administrator perform it only in the initial setting operation.

In the sensor network system 1 configured as described above, as shown in FIG. 6, the management computer 5 wirelessly outputs an instruction signal instructing each sensor wireless tag 6 to measure temperature and humidity (u− 1). In the sensor network system 1, when each sensor wireless tag 6 receives an instruction signal from the antenna unit 9, the high-frequency signal processing unit 10 performs predetermined signal processing and outputs the processed signal to the control unit 8. Recognize
In the sensor network system 1, each sensor wireless tag 6 is connected to the temperature / temperature from the control unit 8.
A temperature / humidity measurement is performed by outputting a control signal that instructs the humidity sensor unit 14 to start the measurement operation (u-2).

In the sensor network system 1, each sensor wireless tag 6 performs a predetermined measurement operation by the temperature / humidity sensor unit 14 and outputs a measurement result to the control unit 8. In the sensor network system 1, each sensor wireless tag 6 creates measurement information based on the measurement result in the control unit 8, reads out the sensor wireless tag ID registered from the memory unit 11, and these measurement information and the sensor wireless tag The ID is output to the high-frequency signal processing unit 10. In the sensor network system 1, each sensor wireless tag 6 includes a high-frequency signal processing unit 10.
Then, the measurement information and the sensor wireless tag ID are subjected to high-frequency signal processing and wirelessly output to the management computer 5 via the antenna unit 9 (u-3).

In the sensor network system 1, the management computer 5 includes each sensor wireless tag 6.
Upon receiving the sensor wireless tag ID and measurement information that are wirelessly output from the sensor wireless tag ID
The target sensor wireless tag 6 is identified based on the above, and individual determination of the temperature and humidity at the installation position of the sensor wireless tag 6 is performed (u-4). In the sensor network system 1, the management computer 5 determines the overall environmental state of the room 3 by individual determination based on the above-described sensor wireless tag ID and measurement information output from each sensor wireless tag 6, and the controlled device. Whether or not the operation No. 4 is necessary is determined (u-5).

In the sensor network system 1, the management computer 5 outputs a control signal for controlling the operation to the controlled device 4 based on the determination result. In the sensor network system 1, the controlled device 4 is controlled in operation based on the control signal,
The room 3 is always set to an environmental state of optimum temperature and humidity.

In the sensor network system 1 described above, a large number of sensor wireless tags 6 are installed in the room 3 and temperature and humidity are measured at a large number of points. However, the present invention is not limited to this application example. . The sensor network system 1 may be, for example, a system in which the sensor wireless tags 6 are installed in each room on each floor and the entire building 2 is managed based on measurement information output from the sensor wireless tags 6. In the sensor network system 1, in this case, a specific lighting device 7 is selected from the lighting devices 7 installed for each room on each floor, and a unique frequency component f is set for each lighting device 7.

In the sensor network system 1, as described above, the management computer 5
The temperature / humidity is measured based on the measurement instruction signal output from the sensor wireless tag 6 to the sensor wireless tag 6, but the present invention is not limited to such a configuration. Each sensor wireless tag 6 is provided with, for example, a clock unit having a timekeeping function, and is configured such that a measurement operation is automatically performed based on a time signal output from the clock unit to the control unit 8 at predetermined time intervals. May be.

In the sensor network system 1, as described above, the active wireless tag including the power supply unit 15 having the battery is used as the sensor wireless tag 6. However, for example, the sensor wireless tag 20 including the passive wireless tag illustrated in FIG. You may make it use. The sensor wireless tag 20 receives the control signal that is wirelessly output from the management computer 5, and the operation of each unit is performed using the received radio wave as a power source. Since the sensor wireless tag 20 has the same basic configuration as the sensor wireless tag 6 described above except for the power supply unit, the description thereof is omitted by attaching the same reference numerals to the corresponding portions.

The sensor wireless tag 20 formed of an active wireless tag includes a rectifier circuit unit 21 that converts wireless output from the management computer 5 received by the antenna unit 9 into direct current. The sensor wireless tag 20 accumulates energy necessary for the initial operation from the preamble portion of the radio wave output from the management computer 5, and the operation of the control unit 8 is performed. Therefore, since the sensor wireless tag 20 does not have a battery, maintenance such as replacement is unnecessary, and the sensor wireless tag 20 is formed inexpensively and compactly. However, it is possible to output measurement information to the management computer 5 by its own operation. No. Since the sensor wireless tag 20 has a short radio wave reception distance, a relay unit is appropriately interposed between the sensor wireless tag 20 and the management computer 5.

In the sensor network system 1, as described above, the lighting device 7 is a fluorescent lamp fixedly installed on the ceiling, and the frequency conversion unit 17 emits the illumination light on which the unique frequency component f is superimposed. However, it is not limited to such an illuminating device 7. In the sensor network system 1, the illumination device 7 may emit illumination light on which information obtained by converting position information into data is superimposed instead of the frequency component f.

In the sensor network system 1, the lighting device 7 is not limited to the fluorescent lamp as the light emitter 16, and may be LED lighting having a specific lighting frequency, for example. The sensor network system 1 may superimpose position information data on the commercial power supply itself installed in each room and connected to the lighting device 7. Furthermore, in the sensor network system 1, instead of the lighting device 7, for example, a nightlight that guides an emergency exit or the like, or an LED built in the switch may be used.

It is a block diagram of a sensor network system shown as an embodiment of the present invention. It is a block diagram of the sensor network system. It is a block diagram of the sensor wireless tag used for the sensor network system. In the same sensor network system, it is a flowchart explaining the installation and registration procedure of each lighting device. In the same sensor network system, it is a flowchart explaining installation and registration procedures of each sensor wireless tag. In the same sensor network system, a flowchart for explaining procedures of measurement and environmental control. FIG. 2 is a block diagram of an active sensor wireless tag used in the sensor network system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sensor network system 2 Building 3 Room 4 Controlled device 5 Management computer 6 Sensor wireless tag 7 Illumination device 8 Control part 9 Antenna part 10 High frequency signal processing part 11 Memory part 12 Photo sensor part 13 Frequency component discrimination | determination part 14 Temperature / humidity sensor Unit 15 power supply unit 16 light emitter 17 frequency conversion unit 20 sensor wireless tag 21 rectifier circuit unit

Claims (5)

A management computer having a wireless tag reader function for outputting a predetermined control signal to the controlled device;
An antenna unit and a high-frequency signal processing unit that perform wireless connection with the management computer, a photosensor unit that receives illumination light, and a frequency component determination unit that determines a frequency component of illumination light received by the photosensor unit An environmental measurement sensor unit that measures a predetermined environmental state, a memory unit that stores identification information given from the management computer, and a control unit that performs control operations of each component, each at a predetermined position in the room A large number of sensor wireless tags installed;
An illuminator and a frequency converter configured to set the emitted light having a predetermined frequency component determined in advance by the management computer according to the installation position in the room to be emitted from the illuminator, and the installation position is registered in the management computer Composed of a number of light emitting devices,
Each of the sensor wireless tags receives the emitted light emitted from the light emitting device, determines the frequency component by the frequency component determination unit, and wirelessly outputs unique frequency component determination information to the management computer. By doing so, the respective installation positions are identified and registered by the management computer,
By wirelessly outputting the measurement information of the environmental state of the installation position measured by the environmental measurement sensor unit, the environmental state at each position in the room is grasped in the management computer,
An environment adjustment is performed by outputting a control signal from the management computer to the controlled device. The sensor network system according to claim 1, wherein the sensor wireless tag is an active wireless tag incorporating a power source. The sensor network system according to claim 1, wherein the sensor wireless tag is a passive wireless tag using a wireless output from the management computer as driving energy. The sensor network system according to any one of claims 1 to 3, wherein the environment measurement sensor unit of the sensor wireless tag is a temperature measurement sensor that measures at least a room temperature. 5. The sensor network system according to claim 1, wherein the light emitting device is a lighting device installed on a ceiling with a predetermined arrangement state. 6.

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