JP2011257086A - Radio control system - Google Patents

Abstract

An object of the present invention is to accurately detect the presence / absence of a person without separately installing a person detection sensor.
VAV control devices 6-1 and 6-2 capable of wireless communication are arranged within a transmittable range of each other. The VAV control device 6-1 receives the transmission radio wave from the VAV control device 6-2 by the two antennas ANT1A and ANT1B, and based on the received level fluctuation amount of the transmission radio wave, the VAV control device 6-1. The presence or absence of a person within the receivable area AR1 is detected and notified to the VAV control device 6-2. The VAV control device 6-2 receives the transmission radio wave from the VAV control device 6-1 by the two antennas ANT2A and ANT2B, and based on the received level fluctuation amount of the transmission radio wave, the VAV control device 6-2. The presence or absence of a person within the receivable area AR2 is detected and notified to the VAV control device 6-1. The VAV control devices 6-1 and 6-2 control the damper opening degree of the VAV units 4-1 and 4-2 based on the human detection results of the receivable areas AR1 and AR2.
[Selection] Figure 1

Description

  The present invention relates to a plurality of wireless control devices (VAV control devices) capable of wireless communication that control the operation of controlled devices such as a variable air supply amount adjustment unit (VAV unit) that adjusts the air supply amount to an air conditioning control area. It is related with the radio | wireless control system provided with.

  Conventionally, in an air conditioning control system in a building, an operation schedule is set in advance based on a time zone in which the occupant in the building exists, so that air conditioning control adapted to the behavior pattern of the occupant is performed. ing. However, since the presence / absence of the occupant is not actually detected, there are cases where the air-conditioning control considering the occupant is continued despite the absence of the occupant. It will be wasted.

  Therefore, recently, a human detection sensor has been installed separately to detect the presence or absence of a room occupant and to control the air conditioning so that the room occupant is comfortable when the occupant is present. ing. In this case, when there is no occupant, air conditioning control is performed so that the minimum air conditioning capability is achieved. Thereby, finer air conditioning control is performed, and energy saving is also achieved.

  There are various types of human detection sensors, such as those using light and those using infrared rays, and those using radio waves as proposed in Patent Document 1 have also been proposed.

  On the other hand, in order to control the air supply amount to the air conditioning control area using the VAV unit as the control target device, an environmental measurement sensor such as a temperature sensor or a humidity sensor that measures the environment of the VAV control device and the air conditioning control area is necessary. However, in recent years, wirelessization of these devices has been rapidly progressing toward the omission of wiring work, the enlargement of the air conditioning control area, and the flexibility to change the layout.

JP 2007-213444 A

  However, in the above-described wireless air-conditioning control system, which has been progressing rapidly in recent years, an attempt to construct an air-conditioning control system that takes into account the presence or absence of a occupant requires a human detection sensor, which increases costs. To do. In addition, work for installing the human detection sensor is required, and labor costs are also required.

  In addition, in the case of human detection sensors that use radio waves, there may be places where the received power becomes very weak depending on the installation location, and the reception level of the transmission radio waves from the human detection sensor is at a level that cannot be measured. There is a possibility that the person is depressed and cannot detect the presence of a person. In addition, when the reception level is low, there is a possibility that the reception level may fluctuate despite the absence of a person, and there is a risk of erroneous detection.

  The present invention has been made to solve such problems, and its purpose is to accurately detect the presence / absence of a person in a desired area without separately installing a human detection sensor. An object is to provide an inexpensive wireless control system that can be used.

  In order to achieve such an object, the present invention has its own transmittable area so as to include the entire receivable area of the other party, and is located within the transmittable area of the other party and is individually controlled by itself. The first and second wireless control devices capable of wireless communication for controlling the operation of the device, a plurality of receiving means for receiving transmission radio waves from the counterpart wireless control device, and transmissions received by the plurality of receiving means Human detection means is provided for detecting the presence or absence of a person within the receivable area of the wireless control device based on the fluctuation amount of the radio wave reception level.

  In the present invention, the first radio control apparatus receives transmission radio waves from the second radio control apparatus by a plurality of reception means, and is based on the amount of fluctuation in the reception level of the transmission radio waves received by the plurality of reception means. Then, the presence / absence of a person within the coverage area is detected. The second radio control apparatus receives the transmission radio wave from the first radio control apparatus by a plurality of reception means, and based on the amount of fluctuation of the reception level of the transmission radio wave received by the plurality of reception means, Detect the presence or absence of people in the coverage area.

  For example, the amount of fluctuation of the reception level within a predetermined time of transmission radio waves received by a plurality of receiving means is monitored, and when all of these fluctuation amounts are equal to or greater than a predetermined threshold, the reception range of the own wireless control device It is determined that there is a person. In addition, among transmission radio waves received by a plurality of receiving means, transmission radio waves except for transmission radio waves whose lower limit of the reception level is lower than a predetermined reception lower limit value are targeted. In any case, when the fluctuation amount of the reception level within the predetermined time is less than the predetermined threshold, it is determined that there is no person within the receivable range of the own wireless control device. Also, the presence / absence of a person within the receivable range of the own wireless control device is determined based on the fluctuation amount of the reception level of at least two transmission radio waves received simultaneously among the transmission radio waves received by a plurality of receiving means. To do.

  In addition, for example, a predetermined transmission radio wave among transmission radio waves received by a plurality of receiving means is targeted, and the amount of fluctuation within a predetermined time of the reception level of the target transmission radio wave is greater than or equal to a predetermined threshold value If it is determined that there is a person within the receivable range of the own wireless control device, the reception level of the target transmission radio wave is below a predetermined reception lower limit value. One of the other transmission radio waves except the transmission radio wave that has been targeted until then is a new target, and the amount of fluctuation within the predetermined time of the reception level of this new target radio wave is When the value is equal to or greater than a predetermined threshold, it is determined that a person is present within the receivable range of the own wireless control device.

  In this case, since the first radio control device and the second radio control device are located within the transmission range of the other party, the first radio control device has the presence or absence of a person within its receivable range. And the second wireless control device detects the presence or absence of a person within the coverage area of the second wireless control device. In this case, a part of the self-receivable area is a common area with the receivable area of the counterpart radio control apparatus.

  Here, as an example of the control method, in the first radio control device, when it is determined that there is a person within the receivable range of the own radio control device, the operation of the control target device is controlled. In the second wireless control device, when it is determined that there is a person within the receivable range of the own wireless control device, the operation of the device to be controlled can be controlled.

  Also, the detection result of the human detection means of the first radio control device is notified to the second radio control device, or the detection result of the human detection means of the second radio control device is notified to the first radio control device. Or you may. In this case, the first radio control apparatus can know the presence / absence of a person within the receivable area of the second radio control apparatus from the detection result of the human detection means of the second radio control apparatus. In the wireless control device, it is possible to know the presence or absence of a person within the receivable area of the first wireless control device from the detection result of the human detection means of the first wireless control device.

  Further, as another example of the control method, in the first radio control device, when it is notified from the radio control device on the other side that there is a person within the receivable range on the other side, In consideration of the presence of a person, the operation of the control target device is controlled, and the second radio control apparatus notifies the other radio control apparatus that there is a person within the receivable range of the other party. In such a case, it is conceivable to control the operation of the device to be controlled in consideration of the presence of a person within the receivable range of the other party.

  In addition, the first and second radio control devices do not notify the detection result of the human detection means to the radio control device on the other side, but receive the reception level of the received transmission radio wave and reception within the predetermined time of the reception level. You may make it notify the other party's radio | wireless control apparatus of the reception condition of the received transmission radio wave, such as a fluctuation amount of a level. In this case, the other party's radio control apparatus detects the presence / absence of a person within the receivable range of the other party based on the notified reception status of the transmitted radio wave.

  According to the present invention, radios that have their own transmittable areas so as to include the entire receivable range of the other party, and that are located within each other's transmittable area and individually control the operation of their own devices to be controlled In the communicable first and second radio control devices, the transmission radio waves from the counterpart radio control device are received by a plurality of reception means, and the amount of fluctuation in the reception level of the transmission radio waves received by the plurality of reception means Based on the above, the presence / absence of a person within the receivable range of his / her wireless control device is detected, so the presence / absence of a person within his / her receivable range can be accurately detected without installing a human detection sensor separately. It is possible to detect the presence / absence of a person within the receivable area of the other party by notification from the other party's radio control device, and taking into account the presence / absence of the person in the room. So that it is possible to provide an inexpensive high-precision control system.

1 is an instrumentation diagram of a VAV control system showing an embodiment of a wireless control system of the present invention. It is a figure which shows the outline of the hardware constitutions of the VAV control apparatus in this VAV control system. It is a top view which shows the transmission possible range of each VAV control apparatus in this VAV control system, the receivable range, and its arrangement | positioning relationship. It is a time chart for demonstrating the 1st person detection output obtained from the variation | change_quantity (DELTA) R21A of reception level R21A in the 1st antenna of the transmission radio wave from a VAV control apparatus, and reception level R21A. It is a time chart for demonstrating the 2nd person detection output obtained from the variation | change_quantity (DELTA) R21B of reception level R21B and reception level R21B of the transmission radio wave from the VAV control apparatus at the 2nd antenna. It is a time chart for demonstrating the human detection result obtained from a 1st human detection output and a 2nd human detection output. It is a flowchart which shows an example of the processing operation according to the air supply control program which CPU of the VAV control apparatus in this VAV control system performs. It is a flowchart which shows an example of the processing operation in a VAV control apparatus when considering also whether a person exists in the receivable range of the other party. It is a flowchart which shows another example of the processing operation in a VAV control apparatus when considering also about whether a person exists in the receivable range of the other party. It is a top view which shows the transmission relation and the reception possible range of each VAV control apparatus when the number of VAV control apparatuses is three, and its arrangement | positioning relationship. It is a figure which shows the area | region where the presence or absence of the person in the receivable area of each VAV control apparatus when each number of VAV control apparatuses is three, the judgment result in each condition, and a person may exist. It is a flowchart which shows an example of the processing operation according to the air supply control program which CPU of a VAV control apparatus performs when the number of VAV control apparatuses is three. It is a time chart for demonstrating the operation example at the time of switching an antenna when the reception level of a transmission radio wave is less than a reception lower limit.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an instrumentation diagram of a VAV control system showing an embodiment of a radio control system of the present invention.

  In the figure, 1 is an air-conditioning control space, 2 is an air conditioner, 3 is a duct, 4 is provided in a blowout part of conditioned air from the air conditioner 2 sent through the duct 3 to the air-conditioning control space 1 The VAV unit 5 is a wireless sensor arranged at an arbitrary location in the air-conditioning control space 1, and 6 receives measurement data transmitted from the wireless sensor 5, and the damper of the VAV unit 4 based on the received measurement data. This is a wireless VAV control device for controlling the opening degree.

  In the example of FIG. 1, one air conditioning control space 1 is divided into two regions (air conditioning control areas) S1 and S2 without providing a partition, and the VAV unit 4-1 and the wireless sensor 5-1 are separated from the region S1. A VAV control device 6-1 is provided, and a VAV unit 4-2, a wireless sensor 5-2, and a VAV control device 6-2 are provided for the area S2.

  Further, a parent-child relationship is established between the VAV control device 6-1 and the wireless sensor 5-1, so that only the measurement data from the wireless sensor 5-1 is received by the VAV control device 6-1, -2 and the wireless sensor 5-2, a parent-child relationship is defined, and only the measurement data from the wireless sensor 5-2 is received by the VAV control device 6-2.

  The wireless sensors 5-1 and 5-2 transmit atmosphere data such as temperature and humidity in the regions S 1 and S 2 as measurement data. In this example, the wireless sensors 5-1 and 5-2 transmit temperature data. That is, the wireless sensor 5-1 transmits the measured value t1pv of the indoor temperature in the region S1 as measured data, and the wireless sensor 5-2 transmits the measured value t2pv of the indoor temperature in the region S2 as measured data.

  The VAV control devices 6-1 and 6-2 correspond to the radio control device referred to in the present invention, and can transmit and receive wirelessly via the antennas ANT1 and ANT2. The VAV control device 6-1 includes a first antenna ATN1A and a second antenna ATN1B that receive a transmission radio wave from the antenna ATN2 of the VAV control device 6-2, and the VAV control device 6-2 includes the VAV control device 6-2. The controller 6-1 includes a first antenna ATN2A and a second antenna ATN2B that receive transmission radio waves from the antenna ATN1. In FIG. 1, AR1 indicates the receivable range (first receivable range) of the VAV control device 6-1, and AR2 indicates the receivable range (second receivable range) of the VAV control device 6-2. Further, AS1 indicates a transmittable range from the VAV control device 6-1 (first transmittable range), and AS2 indicates a transmittable range from the VAV control device 6-2 (second transmittable range).

  FIG. 3 shows the mutual relationship between the receivable area AR1 and the transmittable area AS1 of the VAV control apparatus 6-1 and the receivable area AR2 and the transmittable area AS2 of the VAV control apparatus 6-2. First, the receivable area AR1 of the VAV control device 6-1 is set to include the entire area S1. Similarly, the receivable area AR2 of the VAV control device 6-2 is set so as to include the entire area S2. Next, the transmittable range AS1 of the VAV control device 6-1 is set to include the entire receiveable range AR2 of the VAV control device 6-2. Similarly, the transmittable range AS2 of the VAV control device 6-2 is set to include the entire receiveable range AR1 of the VAV control device 6-1. Note that the coverage area AR1 of the VAV control device 6-1 and the coverage area AR2 of the VAV control device 6-2 have a common area CAR. The common area CAR is generated so as not to make a blind spot in human detection described later. As a result, the VAV control devices 6-1 and 6-2 are located within the transmission range of the other party, and individually control the operations of the VAV units 4-1 and 4-2 that they control. The VAV units 4-1 and 4-2 correspond to devices to be controlled as referred to in the present invention.

  FIG. 2 shows an outline of the hardware configuration of the VAV control device 6. In the figure, 6A is a CPU, 6B is a RAM, 6C is a storage device, 6D is a communication unit, 6E and 6F are interfaces, 6G is a first receiving unit, and 6H is a second receiving unit. The CPU 6A receives measurement data (measurement value tpv of room temperature) from the wireless sensor 5 via the communication unit 6D, and inputs the set value tsp of room temperature set via the interface 6E, and accesses the RAM 6B. However, it operates according to a program stored in the storage device 6C so that air conditioning control is performed so that tpv = tsp.

  The storage device 6C has an air supply amount control program for controlling the damper opening θ of its own VAV unit while monitoring the reception level of the transmission radio wave from the counterpart VAV control device as a program unique to the present embodiment. Is stored. The air supply amount control program is provided in a state where it is recorded on a recording medium such as a CD-ROM, and is read from the recording medium and installed in the storage device 6C.

[Embodiment 1]
Hereinafter, with reference to a flowchart shown in FIG. 7, an example (first embodiment) of a processing operation performed by the CPU 6A in accordance with an air supply amount control program stored in the storage device 6C will be described. In this case, the same operation is performed in the VAV control devices 6-1 and 6-2, but the following description will be divided into the VAV control devices 6-1 and 6-2 for better understanding.

[VAV control device 6-1]
The CPU 6A of the VAV control device 6-1 measures and stores the reception levels R21A and R21B of the radio waves transmitted from the counterpart VAV control device 6-2 received by the receiving units 6G and 6H via the antennas ANT1A and ANT1B. (Step S101).

  FIG. 4A shows a change in the reception level R21A of the transmission radio wave from the VAV control device 6-2 in this case. FIG. 5A shows a change in the reception level R21B of the transmission radio wave from the VAV control device 6-2 in this case. When there is a person in the receivable area AR1 of the VAV control device 6-1, the fluctuation of the reception level R21A, R21B of the transmission radio wave is large, and when there is no person in the receivable area AR1 of the VAV control apparatus 6-1, Variations in the radio wave reception levels R21A and R21B are small.

  The CPU 6A of the VAV control device 6-1 calculates the fluctuation amounts ΔR21A and ΔR21B within a certain time ΔT for the reception levels R21A and R21B of the transmission radio waves from the VAV control device 6-2 (step S102).

  FIG. 4B shows a change in the fluctuation amount ΔR21A within a predetermined time ΔT of the reception level R21A of the transmission radio wave from the VAV control device 6-2 in this case. FIG. 5B shows a change in the fluctuation amount ΔR21B within a certain time ΔT of the reception level R21B of the transmission radio wave from the VAV control device 6-2 in this case. When there is a person in the receivable area AR1 of the VAV control device 6-1, the fluctuation amounts ΔR21A and ΔR21B of the reception levels R21A and R21B of the transmission radio wave are large, and there is a person in the receivable area AR1 of the VAV control apparatus 6-1. If not, the fluctuation amounts ΔR21A and ΔR21B of the received radio wave reception levels R21A and R21B are small.

  The CPU 6A of the VAV control device 6-1 first compares the fluctuation amount ΔR21A of the reception level R21A of the transmission radio wave from the VAV control device 6-2 with a predetermined threshold value ΔRth (step S103). If the fluctuation amount ΔR21A is equal to or greater than the threshold value ΔRth (YES in step S103), the first human detection output is set to the “H” level (step S104). If fluctuation amount ΔR21A is below threshold value ΔRth (NO in step S103), the first human detection output is set to the “L” level (step S105). FIG. 4C shows a change in the first human detection output in this case.

  Next, the CPU 6A of the VAV control device 6-1 compares the fluctuation amount ΔR21B of the reception level R21B of the transmission radio wave from the VAV control device 6-2 with a predetermined threshold value ΔRth (step S106). If the fluctuation amount ΔR21B is equal to or greater than the threshold value ΔRth (YES in step S106), the second human detection output is set to the “H” level. If fluctuation amount ΔR21B is below threshold value ΔRth (NO in step S106), the second human detection output is set to the “L” level. FIG. 5C shows a change in the second human detection output in this case.

  Then, the CPU 6A of the VAV control device 6-1 checks the first human detection output obtained by the determination in step S103 and the second human detection output obtained by the determination in step S106, and detects the first human detection. If both the output and the second person detection output are at the “H” level (YES in step S109), it is determined that there is a person in the receivable area AR1 of the VAV control device 6-1 (step S110).

  In this case, since the VAV control devices 6-1 and 6-2 are located within the transmission range of the other party, the CPU 6A of the VAV control device 6-1 has the presence of the person within its own reception range AR1. The presence or absence is detected.

  Here, a part of its own receivable area AR1 is also a part of the receivable area AR2 of the partner VAV control apparatus 6-2, and this area is the receivable area AR1 of the VAV control apparatus 6-1. It is a common area CAR with the receivable area AR2 of the VAV control device 6-2.

  When the CPU 6A of the VAV control device 6-1 determines that there is a person in its own receivable area AR1 (step S110), considering that there is a person in its own receivable area AR1, the VAV unit 4-1 Is controlled (step S111).

  On the other hand, if both the first person detection output and the second person detection output are not at the “H” level, that is, any one of the first person detection output and the second person detection output is “L”. "(NO in step S109), it is determined that there is no person in the receivable area AR1 of the VAV control device 6-1 (step S112). In this case, the damper opening degree θ1 of the VAV unit 4-1 is controlled in consideration that there is no person in the own receivable area AR1 (step S113).

  FIG. 6C shows a human detection result indicating the presence or absence of a person obtained from the first human detection output (FIG. 6A) and the second human detection output (FIG. 6B). It is a time chart. In this example, the first human detection output is at the “L” level at the time point ta, and the second human detection output is at the “L” level at the time point tb. In this case, at time tb, it is determined that there is no person in the receivable area AR1 of the VAV control device 6-1, and it has been performed in consideration of the existence of a person in its own receivable area AR1. The control of the damper opening degree θ1 of the VAV unit 4-1 is switched to the control in consideration of the absence of a person in the own receivable area AR1.

  In this example, the reception level R21A of the transmission radio wave from the VAV control device 6-2 shown in FIG. 4A is small, and the lower limit value of the reception lower limit value LR indicating the minimum level required as the received power is set many times. It is below. In such a reception situation, it is conceivable that the reception power fluctuates even though no person actually exists. If the presence / absence of a person is determined based on the reception level R21A as it is, there is a high possibility of erroneous determination.

  On the other hand, the reception level R21B of the transmission radio wave from the VAV control device 6-2 shown in FIG. 5B is large and far from the reception lower limit value LR. In such a reception situation, when there is no person, the variation in received power is extremely small.

  In the present embodiment, since the human detection result is obtained by taking the logical product (AND) of the first human detection output and the second human detection output, the human detection output of the person with the lower reception level is obtained. The result indicating the presence is eliminated, and the presence / absence of a person can be detected with high accuracy.

[VAV control device 6-2]
The CPU 6A of the VAV control device 6-2 measures and stores the reception levels R12A and R12B of the radio waves transmitted from the counterpart VAV control device 6-1 received by the receiving units 6G and 6H via the antennas ANT2A and ANT2B. (Step S101). When there is a person in the receivable area AR2 of the VAV control device 6-2, fluctuations in the reception levels R12A and R12B of the transmission radio wave are large, and when there is no person in the receivable area AR2 of the VAV control apparatus 6-2, transmission is performed. Variations in the radio wave reception levels R12A and R12B are small.

  The CPU 6A of the VAV control device 6-2 calculates the fluctuation amounts ΔR12A and ΔR12B within a predetermined time ΔT for the reception levels R12A and R12B of the transmission radio waves from the VAV control device 6-1 (step S102). When there is a person in the receivable area AR2 of the VAV control apparatus 6-2, the fluctuation amounts ΔR12A and ΔR12B of the reception levels R12A and R12B of the transmission radio wave are large, and there is a person in the receivable area AR2 of the VAV control apparatus 6-2. If not, the fluctuation amounts ΔR12A and ΔR12B of the received radio wave reception levels R12A and R12B are small.

  The CPU 6A of the VAV control device 6-2 first compares the fluctuation amount ΔR12A of the reception level R12A of the transmission radio wave from the VAV control device 6-1 with a predetermined threshold value ΔRth (step S103). If the variation ΔR12A is equal to or greater than the threshold ΔRth (YES in step S103), the first human detection output is set to the “H” level (step S104). If fluctuation amount ΔR12A is less than threshold value ΔRth (NO in step S103), the first human detection output is set to the “L” level (step S105).

  Next, the CPU 6A of the VAV control device 6-2 compares the fluctuation amount ΔR12B of the reception level R12B of the transmission radio wave from the VAV control device 6-1 with a predetermined threshold value ΔRth (step S106). Here, if the fluctuation amount ΔR12B is equal to or larger than the threshold value ΔRth (YES in step S106), the second human detection output is set to the “H” level. If fluctuation amount ΔR12B is below threshold value ΔRth (NO in step S106), the second human detection output is set to the “L” level.

  Then, the CPU 6A of the VAV control device 6-2 checks the first human detection output obtained by the determination in step S103 and the second human detection output obtained by the determination in step S106, and detects the first human detection. If both the output and the second person detection output are at the “H” level (YES in step S109), it is determined that there is a person in the receivable area AR2 of the VAV control device 6-2 (step S110). In this case, the damper opening degree θ2 of the VAV unit 4-2 is controlled in consideration of the presence of a person in the receivable area AR2 (step S111).

  On the other hand, if both the first person detection output and the second person detection output are not at the “H” level, that is, any one of the first person detection output and the second person detection output is “L”. "(NO in step S109), it is determined that there is no person in the receivable area AR2 of the VAV control device 6-2 (step S112). In this case, the damper opening degree θ2 of the VAV unit 4-2 is controlled in consideration of the absence of a person in the own receivable area AR2 (step S113).

  Thus, in the same manner as described with reference to FIG. 6, when either one of the first detection output and the second detection output becomes “L” level, reception by the VAV control device 6-2 is possible. The control of the damper opening θ2 of the VAV unit 4-2, which has been performed in consideration of the presence of a person in the area AR2 in which the person can be received, has been The control is switched in consideration of the absence of a person in the coverage area AR2.

  In the first embodiment, in the VAV6 control apparatus, there are two antennas for receiving transmission radio waves from the other party, but the number of antennas may be further increased.

  In the first embodiment, the VAV control device 6 obtains the human detection result by taking the logical product of the first human detection output and the second human detection output. The transmission radio wave except the transmission radio wave whose value is lower than the reception lower limit value LR is excluded from the target, and the fluctuation amount ΔR of the reception level R within the predetermined time ΔT is less than the threshold ΔRth even for one of the other target transmission radio waves In this case, it may be determined that there is no person within the coverage area.

  In the first embodiment, when there are three or more antennas for receiving transmission radio waves from the other party, at least two transmission radio waves received simultaneously among the transmission radio waves received by three or more antennas. The presence / absence of a person within the receivable range may be determined based on the fluctuation amount of the reception level.

[Embodiment 2]
In the first embodiment described above, the VAV control device 6-1 detects the presence or absence of a person in its own receivable area AR1, and if there is a person in its own receivable area AR1, its own receivable area The damper opening degree θ1 of the VAV unit 4-1 is controlled in consideration of the presence of a person in AR1, but considering whether or not a person is present in the receivable area AR2 of the other party, The damper opening degree θ1 of the VAV unit 4-1 may be controlled (Embodiment 2). The same applies to the VAV control device 6-2.

[First example of the second embodiment: When receiving a notification of a person detection result within the receivable range of the other party from the other party]
FIG. 8 shows an example of a processing operation (first example of the second embodiment) in the VAV control device 6 when considering whether or not there is a person within the receivable range of the other party. Since the VAV control devices 6-1 and 6-2 perform the same processing operation, here, the processing operation in the VAV control device 6-1 will be described as a representative.

  The CPU 6A of the VAV control device 6-1 measures and stores the reception levels R21A and R21B of the radio waves transmitted from the counterpart VAV control device 6-2 received by the receiving units 6G and 6H via the antennas ANT1A and ANT1B. (Step S201).

  Then, fluctuation amounts ΔR21A and ΔR21B within a predetermined time ΔT are calculated for the reception levels R21A and R21B of the transmission radio waves from the VAV control device 6-2 (step S202) and compared with a threshold value ΔRth (step S203).

[When ΔR21A ≧ ΔRth and ΔR21B ≧ ΔRth]
Here, if the fluctuation amounts ΔR21A and ΔR21B are both equal to or greater than the threshold value ΔRth (YES in step S203), it is determined that there is a person in the receivable area AR1 of the VAV control device 6-1 (step S204), and the determination result Is notified to the partner VAV control device 6-2 as a human detection result (step S205).

  Then, the person detection result indicating whether or not there is a person in the other party's receivable area AR2 notified from the other party's VAV control device 6-2 is fetched (step S206). If it indicates that there is a person in the receivable area AR2 (YES in step S207), it is determined that a person exists in both the self-receivable area AR1 and the other party's receivable area AR2 (step S208). . In this case, considering that there are people in both the self-receivable area AR1 and the other-side receivable area AR2, the amount of conditioned air blown from the two systems combining the self and the other party is not excessive. Thus, the damper opening degree θ1 of the VAV unit 4-1 is controlled (step S209).

  On the other hand, if the person detection result captured in step 206 indicates that there is no person in the other party's receivable area AR2 (NO in step S207), then there is a person in the own receivable area AR1. However, it is determined that no person exists in the receivable area AR2 of the other party (step S210). In this case, the damper opening θ1 of the VAV unit 4-1 is controlled in consideration of the fact that there is no person in the receivable area AR2 on the other side and that there is a person only in the own receivable area AR1 ( Step S211).

[When ΔR21A ≧ ΔRth and ΔR21B ≧ ΔRth are not satisfied]
On the other hand, if at least one of the fluctuation amounts ΔR21A and ΔR21B is below the threshold value ΔRth (NO in step S203), it is determined that there is no person in the receivable area AR1 of the VAV control device 6-1 (step S212). The determination result is notified as a human detection result to the other party's VAV control device 6-2 (step S213).

  Then, a person detection result indicating whether or not a person is present in the receivable area AR2 on the other side notified from the other party's VAV control device 6-2 is fetched (step S214). If it indicates that no person is present in the coverage area AR2 (NO in step S215), it is determined that no person is present in either the self-receivable area AR1 or the other-side coverage area AR2 (step S216). ). In this case, the damper opening degree θ1 of the VAV unit 4-1 is controlled in consideration that there is no person in the own receivable area AR1 and the other party's receivable area AR2 (step S217).

  On the other hand, if the person detection result acquired in step 214 indicates that there is a person in the receivable area AR2 of the other party (YES in step S215), there is a person in the self-receivable area AR1. However, it is determined that there is a person in the receivable area AR2 of the other party (step S218). In this case, the damper opening θ1 of the VAV unit 4-1 is controlled in consideration that there is a person in the receivable area AR2 on the other side but no person is present in the own receivable area AR1 ( Step S219).

[Second example of second embodiment: When receiving notification of reception status of own transmission radio wave from other party]
FIG. 9 shows another example (second example of the second embodiment) of the processing operation in the VAV control device 6 when considering whether or not there is a person within the receivable range of the other party. Also in this example, since the VAV control devices 6-1 and 6-2 perform the same processing operation, the processing operation in the VAV control device 6-1 will be described as a representative.

  The CPU 6A of the VAV control device 6-1 measures and stores the reception levels R21A and R21B of the radio waves transmitted from the counterpart VAV control device 6-2 received by the receiving units 6G and 6H via the antennas ANT1A and ANT1B. (Step S301).

  Then, fluctuation amounts ΔR21A and ΔR21B within a predetermined time ΔT are calculated for reception levels R21A and R21B of transmission radio waves from the VAV control device 6-2 (step S302), and the calculated fluctuation amounts ΔR21A and ΔR21B are calculated on the other side. Is notified to the VAV control device 6-2 (step S303).

  Then, the fluctuation amounts ΔR12A and ΔR12B of the reception levels R12A and R12B of the own transmission radio waves notified from the partner VAV control device 6-2 are captured and stored (step S304), and the VAV control device calculated in step S302 is used. The fluctuation amounts ΔR21A, ΔR21B of the reception levels R21A, R21B of the transmission radio waves from 6-2 are compared with the threshold value ΔRth (step S305).

[When ΔR21A ≧ Rth and ΔR21B ≧ ΔRth]
Here, if both of the fluctuation amounts ΔR21A and ΔR21B are equal to or larger than the threshold value ΔRth (YES in step S305), the fluctuation amount ΔR12A of the reception level of the own transmission radio wave in the counterpart VAV control device 6-2 captured in step S304. , ΔR12B and the threshold value ΔRth are compared (step S306).

  Here, if the fluctuation amounts ΔR12A and ΔR12B are both equal to or larger than the threshold value ΔRth (YES in step S306), it is determined that there is a person in both the own receivable area AR1 and the other party's receivable area AR2 (step S306). S307). In this case, in consideration of the presence of a person in the own coverage area AR1 and the other party's coverage area AR2, the amount of conditioned air from the two systems combining the self and the other party does not become excessive. Thus, the damper opening degree θ1 of the VAV unit 4-1 is controlled (step S308).

  On the other hand, if at least one of the fluctuation amounts ΔR12A and ΔR12B is less than the threshold value ΔRth (NO in step S306), there is a person in the receivable area AR1 of the own VAV control device 6-1, It is determined that no person exists in the coverage area AR2 of the counterpart VAV control device 6-2 (step S309). In this case, the damper opening θ1 of the VAV unit 4-1 is controlled in consideration of the fact that there is no person in the receivable area AR2 on the other side and that there is a person only in the own receivable area AR1 ( Step S310).

[When ΔR21A ≧ ΔRth and ΔR21B ≧ ΔRth are not satisfied]
If at least one of the fluctuation amounts ΔR21A and ΔR21B is below the threshold value ΔRth (NO in step S305), the fluctuation amount ΔR12A of the reception level of the own transmission radio wave in the counterpart VAV control device 6-2 captured in step S304, ΔR12B is compared with a threshold value ΔRth (step S311).

  Here, if at least one of the fluctuation amounts ΔR12A and ΔR12B is less than the threshold value ΔRth (NO in step S311), it is determined that there is no person in either the own receivable area AR1 or the counterpart receivable area AR2. (Step S312). In this case, the damper opening degree θ1 of the VAV unit 4-1 is controlled in consideration of the absence of a person in both the own receivable area AR1 and the other party's receivable area AR2 (step S313).

  On the other hand, if both of the fluctuation amounts ΔR12A and ΔR12B are equal to or larger than the threshold value ΔRth (YES in step S311), there is no person in the own receivable area AR1, but the other party's receivable area AR2 It is determined that a person exists (step S314). In this case, the damper opening θ1 of the VAV unit 4-1 is controlled in consideration that there is a person in the receivable area AR2 on the other side but no person is present in the own receivable area AR1 ( Step S315).

  In the second example of the second embodiment, in step 303, the fluctuation amounts ΔR21A and ΔR21B of the reception levels R21A and R21B of the transmission radio waves are notified to the counterpart VAV control device 6-2. The radio wave reception levels R21A and R21B may be notified to the counterpart VAV control device 6-2. In this case, the counterpart VAV control device 6-2 calculates the fluctuation amounts ΔR21A and ΔR21B within a predetermined time ΔT from the reception levels R21A and R21B of the transmission radio waves, and compares it with the threshold value ΔRth.

[Embodiment 3]
In the first and second embodiments described above, the number of VAV control devices 6 is two for simplicity of explanation, but the number of VAV control devices 6 is not limited to two.

  FIG. 10 shows the arrangement of the VAV control devices 6 (6-1, 6-2, 6-3) and the VAV control devices 6 (6-1, 6-2, when the number of VAV control devices 6 is three. 6-3) shows the interrelationship between the transmittable range AS (AS1, AS2, AS3) and the receiveable range AR (AR1, AR2, AR3). First, the transmittable range AS1 of the VAV control device 6-1 is set to include the entire receiveable range AR2 of the VAV control device 6-2 and the receiveable range AR3 of the VAV control device 6-3.

  Similarly, the transmittable range AS2 of the VAV control device 6-2 is set to include the entire receiveable range AR1 of the VAV control device 6-1 and the receiveable range AR3 of the VAV control device 6-3. Similarly, the transmittable area AS3 of the VAV control device 6-3 is set to include the entire receivable area AR1 of the VAV control apparatus 6-1 and the entire receivable area AR2 of the VAV control apparatus 6-2.

  Also, the receivable area AR (AR1, AR2, AR3) of each VAV control device 6 (6-1, 6-2, 6-3) is a single area SAR (SAR1, SAR2) that is not included in the receivable area of the other side. , SAR3) and a common area CAR (CAR12, CAR13, CAR23, CAR123) including a part of the other party's receivable area. That is, the receivable area AR1 of the VAV control device 6-1 includes a single area SAR1, a common area CAR12, CAR13, and a common area CAR123.

  Similarly, the receivable area AR2 of the VAV control device 6-2 includes a single area SAR2, a common area CAR12, CAR23, and a common area CAR123. Similarly, the receivable area AR3 of the VAV control device 6-3 includes a single area SAR3, a common area CAR13, CAR23, and a common area CAR123. The common areas CAR12, CAR13, CAR23, and CAR123 are generated so as not to make a blind spot when detecting a person. As a result, the VAV control devices 6-1, 6-2, and 6-3 are located within the transmission range of the other party.

  FIG. 12 shows an example of processing operation in the VAV control device 6 in this case. Since the VAV control devices 6-1, 6-2, and 6-3 perform the same processing operation, here, the processing operation in the VAV control device 6-1 will be described as a representative.

  The CPU 6A of the VAV control device 6-1 receives reception levels R21A, R21B of transmission radio waves from the other VAV control devices 6-2, 6-3 received by the receiving units 6G, 6H via the antennas ANT1A, ANT1B, R31A and R31B are measured and stored (step S401). Then, fluctuation amounts ΔR21A, ΔR21B, ΔR31A, ΔR31B within a predetermined time ΔT are calculated for the reception levels R21A, R21B, R31A, R31B of the transmission radio waves from the VAV control devices 6-2, 6-3 (step S402). .

[Judgment of presence / absence of AR1 within its own coverage area]
Next, the fluctuation amounts ΔR21A and ΔR21B of the reception levels R21A and R21B of the transmission radio waves from the VAV control device 6-2 calculated in step S402 are compared with the threshold value ΔRth (step S403), and the fluctuation amounts ΔR21A and ΔR21B are both determined. If it is equal to or greater than the threshold value ΔRth (YES in step S403), it is determined that there is a person in the receivable area AR1 of the VAV control device 6-1 (step S404), and the determination result is used as the person detection result. 6-2, 6-3 is notified (step S405).

  On the other hand, if at least one of the fluctuation amounts ΔR21A and ΔR21B is less than the threshold value ΔRth (NO in step S403), the fluctuations in the reception levels R31A and R31B of the transmission radio waves from the VAV control device 6-3 calculated in step S402. The amounts ΔR31A, ΔR31B and the threshold value ΔRth are compared (step S406). If the fluctuation amounts ΔR31A and ΔR31B are both greater than or equal to the threshold value ΔRth (YES in step S406), the person within the receivable area AR1 of the VAV control device 6-1 Is determined (step S404), and the determination result is notified to the partner VAV control devices 6-2 and 6-3 as a human detection result (step S405). On the other hand, if at least one of the fluctuation amounts ΔR31A and ΔR31B is below the threshold value ΔRth (NO in step S406), it is determined that there is no person in the receivable area AR1 of the VAV control device 6-1 (step S407). The determination result is notified to the partner VAV control device 6-2, 6-3 as a human detection result (step S408).

[Determination of presence / absence of AR2 and AR3 within the coverage area of the other party]
Then, the person detection result in the receivable area AR2 of the VAV control device 6-2 notified from the VAV control device 6-2 on the other side, and the VAV control device 6-3 notified from the VAV control device 6-3. The person detection result of the receivable area AR3 is fetched (step S409).

  Then, the CPU 6A of the VAV control device 6-1 makes a comprehensive determination based on the respective human detection results by the VAV control devices 6-1, 6-2, 6-3 (see FIG. 11), and the overall An area where there is a possibility that a person exists is identified from the result of the determination (step S410). Then, the damper opening degree θ1 of the VAV unit 4-1 controlled by itself is controlled in consideration of an area where the specified person may exist (step S411).

  Note that the comprehensive determination in step S410 is specifically determining which of the eight cases shown in FIG. 11 corresponds to, for example, case 4 (VAV control device 6-1). If there is no person in the coverage area AR1 of the VAV control device 6-2, but there is no person in the coverage area AR2 of the VAV control device 6-2 and the coverage range AR3 of the VAV control device 6-3) The area that can be used is narrowed down to the single area SAR1 in the receivable area AR1 of the VAV control device 6-1.

  In addition, in consideration of the area where the specified person may exist in step S411, controlling the VAV unit controlled by the self is specifically by changing the control depending on the case as follows. is there. First, when a person exists only in the single area SAR of the receivable area AR of any VAV control device 6 (cases 4, 6, and 7 in FIG. 9), the person exists within the own receivable area AR. The VAV control device 6 may control the VAV unit controlled by itself without considering the presence of people in other areas. On the other hand, when a person exists in the coverage area AR of two or more VAV control apparatuses 6 (cases 1 to 3 and 5 in FIG. 9), the VAV control apparatus in which a person exists within the own coverage area AR. 6 considers that there is also a person in the other party's receivable area AR, and controls itself so that the amount of conditioned air blown from a plurality of systems combining the self and the other party is not excessive. It is necessary to control the VAV unit.

[Embodiment 4]
In the first to third embodiments described above, the VAV control device 6 obtains the first human detection output obtained from the reception level of the transmission radio wave at the first antenna and the reception level of the transmission radio wave at the second antenna. The human detection result is obtained by performing a logical product with the second human detection output. For example, the transmission radio wave received by the first antenna is targeted, and the reception level RA of the transmission radio wave to be targeted is the target. When the fluctuation amount ΔRA within the predetermined time ΔT is equal to or greater than the threshold value ΔRth, it is determined that there is a person within the receivable range of the subject. On the other hand, when the reception level RA of the target transmission radio wave is below the reception lower limit value LR When the transmission radio wave received by the second antenna is a new target, and the fluctuation amount ΔRB within the predetermined time ΔT of the reception level RB of the transmission radio wave that is the new target is greater than or equal to the threshold ΔRth, Shin can be be determined that a person exists within (Embodiment 4).

  An operation example of the fourth embodiment will be described with reference to FIG. In this case, in the VAV control device 6-1, normally, the transmission radio wave from the VAV control device 6-2 received by the antenna ANT1A is targeted, and within the predetermined time ΔT of the reception level R21A of the target transmission radio wave. The fluctuation amount ΔR21A is obtained, and when the fluctuation amount ΔR21A of the reception level R21A is equal to or larger than the threshold value ΔRth, it is determined that there is a person in the receivable area AR1 of the own VAV control device 6-1.

  Here, when the reception level R21A of the transmission radio wave received by the antenna ANT1A falls below the reception lower limit value LR, the antenna is switched from the antenna ANT1A to the antenna ANT1B, and the transmission radio wave from the VAV control device 6-2 received by the antenna ANT1B. , And a variation amount ΔR21B within a predetermined time ΔT of the reception level R21B of the transmission radio wave to be targeted is obtained. When the fluctuation amount ΔR21B of the reception level R21B is equal to or greater than the threshold value ΔRth, it is determined that there is a person in the receivable area AR1 of the partner VAV control device 6-1, and the fluctuation amount ΔR21B of the reception level R21B falls below the threshold value ΔRth In this case, it is determined that there is no person in the receivable area AR1 of the counterpart VAV control device 6-1. The same operation is performed in the VAV control device 6-2.

  Even in the case of such a method of switching antennas, the number of antennas is not limited to two. In this method, when the number of antennas is three or more, when the reception level of the target transmission radio wave is below the reception lower limit value, the transmission radio waves that have been targeted so far among the transmission radio waves received by multiple antennas One of the other transmitted radio waves except for is a new target. In this case, switching to an arbitrary antenna may be performed, or switching may be performed by determining the order for each antenna.

  The wireless control system of the present invention is not limited to air conditioning control, and can be applied to a system in which a plurality of wireless control devices such as lighting devices and building management devices can transmit and receive each other.

  DESCRIPTION OF SYMBOLS 1 ... Air-conditioning control space, 2 ... Air conditioner, 3 ... Duct, 4 (4-1, 4-2) ... VAV unit, 5 (5-1, 5-2) ... Wireless sensor, 6 (6-1, 6) -2, 6-3) ... VAV control device, 6A ... CPU, 6B ... RAM, 6C ... storage device, 6D ... communication unit, 6E, 6F ... interface, 6G ... first receiving unit, 6H ... second receiving Part, AR1, AR2, AR3 ... receivable area, AS1, AS2, AS3 ... transmittable area, ANT1, ANT1A, ANT1B ... antenna, ANT2, ANT2A, ANT2B ... antenna.

Claims (8)

The first and second wireless communication devices that have their own transmittable area so as to include the entire receivable area of the other party, and that are located within the transmittable area of the other party and individually control the operation of their own control target devices A wireless control system including a second wireless control device,
The first and second radio control devices are:
A plurality of receiving means for receiving transmission radio waves from the counterpart wireless control device;
And a human detection unit that detects presence / absence of a person within the receivable range of the radio control device based on a variation amount of a reception level of a transmission radio wave received by the plurality of reception units. Control system. The radio control system according to claim 1,
The human detection means of the first and second radio control devices are:
One of the transmission radio waves targeted for transmission radio waves, except for transmission radio waves received by the plurality of receiving means, whose transmission level is lower than a predetermined reception lower limit value. However, when the amount of fluctuation of the reception level within a predetermined time is less than a predetermined threshold, it is determined that no person is present within the receivable range of the own wireless control device. In the radio control system according to claim 1 or 2,
The human detection means of the first and second radio control devices are:
The presence / absence of a person within the receivable area of the own wireless control device is detected based on the amount of fluctuation of the reception level of at least two transmission radio waves received simultaneously among the transmission radio waves received by the plurality of receiving means. A wireless control system characterized by that. In the radio control system according to claim 3,
The human detection means of the first and second radio control devices are:
A radio control system, characterized in that, when all of the fluctuation amounts of the reception level of transmission radio waves from the plurality of receiving means are equal to or greater than a predetermined threshold, it is determined that a person exists within the receivable range of the own radio control apparatus. In the radio control system according to claim 1 or 2,
The human detection means of the first and second radio control devices are:
If one of the transmission radio waves received by the plurality of receiving means is a predetermined transmission radio wave and the amount of fluctuation of the reception level of the target transmission radio wave within a predetermined time is greater than or equal to a predetermined threshold, When the reception level of the target transmission radio wave falls below a predetermined reception lower limit value, it is received by the plurality of reception means. One of the other transmission radio waves excluding the transmission radio wave that has been targeted until then is a new target, and the amount of fluctuation within the predetermined time of the reception level of this new target radio wave is predetermined. A radio control system, characterized in that it is determined that there is a person within the receivable range of its own radio control apparatus when it is equal to or greater than the threshold value. In the radio control system according to any one of claims 1 to 5,
The first and second radio control devices are:
When it is determined by the person detection means that a person is present within the receivable range of the own wireless control device, the operation of the device to be controlled is controlled in consideration of the presence of the person within the receivable range of the self. A wireless control system characterized by that. In the radio control system according to any one of claims 1 to 6,
The first and second radio control devices are:
A wireless control system comprising: a detection result notifying unit for notifying a detection result of the human detection unit to a radio control device on the other side. In the radio control system according to claim 7,
The first and second radio control devices are:
When the detection result notifying means of the other party's radio control apparatus notifies that there is a person within the receivable range of the other party, taking into account that there is a person within the receivable range of the other party, A wireless control system that controls the operation of a device to be controlled.

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