JP2006140764A - Radio transmitter-receiver and light control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit not only control signals but also monitoring data by one set of radio apparatus without accelerating a communication speed. <P>SOLUTION: A radio transmitter-receiver is provided with a radio master set for transmitting the control signals for controlling a control object and receiving the monitoring data and a radio slave set for receiving the control signals from the radio master set and transmitting the monitoring data relating to the control of the control object to the radio master set. The radio master set transmits and outputs the control signals for the control object, is turned to a reception mode after the lapse of the time required for transmitting the control signals until the next control signal is inputted, and receives the monitoring data from the radio slave set during the reception mode. In the meantime, the radio slave set switches to a transmission mode after receiving the control signals from the radio master set and transmits the monitoring data to the radio master set while the radio master set is in the reception mode. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless transmission / reception device and a dimming control system that control a lighting load by a wireless signal.

  For example, in indoor and outdoor lighting facilities such as concert halls and temporary event venues, a dimming control signal input from the dimming operation means via the master unit side signal line is converted into a radio signal by the wireless master unit, and a plurality of wireless slave units are set. A dimming control system for controlling a plurality of dimmers by transmitting to the light has been put into practical use. In addition, when outputting dimming control signals to multiple dimmers, the lighting control is started by the control synchronization signal after the dimming control signals from the console are transmitted to all dimmers. However, there is one that can simultaneously control a plurality of illumination loads (see, for example, Patent Document 1).

In such a dimming control system, a dimming signal from the dimming operation means is transmitted from the wireless master device to the wireless slave device using a wireless device having a communication speed substantially equal to the communication speed of the dimming control signal, Further, a dimming control signal is transmitted from the wireless slave unit to the dimmer. Therefore, the idle time from when one dimming control signal is transmitted to each dimmer until the next dimming control signal is transmitted is small, and the dimming control signal is transmitted almost continuously. Is done.
JP 2000-195681 A

  However, when a function for transmitting monitoring data such as an operation state and a communication state from the dimmer to the console is added, it is necessary to secure time for transmitting the monitoring data. For this reason, the radio master unit and the radio slave unit use a radio unit that is faster than the communication speed of the dimming control signal, or use two sets of radio units to ensure the transmission time of monitoring data. There must be.

  The use of a high-speed radio device increases the cost, and the use of two sets of radio devices not only increases the cost but also increases the device size.

  An object of the present invention is to provide a wireless transmission / reception apparatus and a dimming control system that can transmit not only control signals but also monitoring data with a set of wireless devices without increasing the communication speed.

  According to a first aspect of the present invention, there is provided a radio transmission / reception apparatus that transmits a control signal for controlling a control target and receives monitoring data, and receives a control signal from the radio main unit and monitors the control target. A wireless slave device that transmits data to the wireless master device; the wireless master device transmits and outputs a control signal for a control target, and after the elapse of time required to transmit the control signal, the next control signal Is set to the reception mode until the data is input, and monitoring data is received from the wireless slave unit during the reception mode; the wireless slave unit switches to the transmission mode after receiving the control signal from the wireless master unit. The monitoring data is transmitted to the wireless master device during the reception mode of the wireless master device.

  In the present invention and each of the following inventions, the definitions and technical meanings of terms are as follows unless otherwise specified. The wireless transmission / reception apparatus includes a wireless master device and a wireless slave device, and each wireless device uses a wireless device having a communication speed substantially the same as the communication speed of the control signal.

  A control signal to be controlled is input from the outside to the wireless master unit. For example, when a control signal to be controlled is input from the outside, the wireless master device transmits and outputs a control signal for the control target as a transmission mode. At the same time, the period from the elapse of the time required for transmission of the control signal until the next control signal is input is determined as idle time, and the period is set as the reception mode. Then, monitoring data is received from the wireless slave unit during the reception mode. On the other hand, the wireless slave device receives a control signal from the wireless master device, and when reception is completed, switches to the transmission mode and transmits monitoring data related to control of the control target to the wireless master device.

  A dimming control system according to a second aspect of the present invention includes a dimming operation means for outputting a dimming control signal for dimming control of an illumination load; and a dimming control signal input from the dimming operation means is converted into a radio signal. A wireless master device for transmitting; a wireless slave device for receiving a dimming control signal from the wireless master device; and controlling a lighting load based on the dimming control signal from the wireless slave device, and monitoring the self and the lighting load A dimmer for outputting data to the wireless slave device; the wireless master device transmits and outputs a dimming control signal for the dimmer that is a dimming control target, and transmits the dimming control signal. From the elapse of the time required for the time until the next dimming control signal is input, the monitoring mode is received from the wireless slave unit during the reception mode; After receiving the dimming control signal from the main unit And transmitting during a receive mode of Rikae the wireless master unit monitoring data from the dimmer to the wireless master unit.

  According to the present invention, the wireless transmission / reception apparatus according to claim 1 is applied to a dimming control system. As the wireless master device and the wireless slave device, for example, a wireless device having a communication speed almost equal to the communication speed of the dimming control signal is used. Only the dimming control signal for the dimmer that is the dimming control target is output from the dimming operation means. When a dimming control signal for the dimmer is input, the wireless master transmits and transmits the dimming control signal as a transmission mode. At the same time, the period from the elapse of the time required for transmission of the dimming control signal until the next dimming control signal is input is determined as idle time, and the period is set as the reception mode. Then, monitoring data is received from the wireless slave unit during the reception mode. On the other hand, when the wireless slave device receives the dimming control signal from the wireless master device, the wireless slave device outputs the dimming control signal to the dimmer and performs dimming control on the illumination load. When reception of the dimming control signal is completed, the mode is switched to the transmission mode, and monitoring data relating to dimming control of the dimmer and the lighting load is transmitted to the wireless master unit.

  A dimming control system according to a third aspect of the present invention provides the dimming control system according to the second aspect of the present invention, wherein a plurality of wireless slave devices each having a different ID number are provided for one wireless master device, and the wireless master device is provided. The machine has a function of switching to a reception mode after wirelessly transmitting a dimming control signal, receiving monitoring data from each wireless slave unit, and returning to the transmission mode after a predetermined time has elapsed, Is switched to the transmission mode after receiving, and the monitoring data is transmitted after the elapse of the time obtained by multiplying the wireless ID number by a predetermined time, and then the mode is returned to the reception mode.

  The present invention is applied to a dimming control system composed of a plurality of wireless slave units with respect to one wireless master unit. Each wireless slave unit receives the following dimming control signal. The monitoring data is transmitted after a lapse of time obtained by multiplying the wireless ID number by a predetermined time in the idle time until the time is set.

  A dimming control system according to a fourth aspect of the present invention is the dimming control system according to the third aspect of the present invention, wherein the wireless master unit wirelessly transmits by switching frequency channels to a plurality of wireless slave units in order when the power is turned on. A response from the mobile station is received to determine the usage status of the frequency channel, and the available frequency channel is confirmed, and the frequency channel is changed to one of the available frequency channels for the responding wireless slave unit. And

  The present invention recognizes a wireless slave device that can wirelessly communicate with a wireless master device when power is turned on, and determines a dimmer that can be dimmed and controlled at present.

  According to the first aspect of the present invention, the period from the elapse of the time required to transmit the control signal for the control target until the next control signal is input is set as the reception mode of the wireless master unit. Since the monitoring data is transmitted from the wireless slave device to the wireless master device, even if the wireless device has a low communication speed, the monitoring data can be transmitted from the wireless slave device to the wireless master device without increasing the number of wireless devices.

  According to the second aspect of the present invention, since only the dimming control signal for the dimmer is transmitted, even if the wireless device has a low communication speed, there is no space until the next dimming control signal is input. Time can be secured. Accordingly, the dimming control signal can be transmitted from the console to the dimmer without changing the structure of the apparatus, and the monitoring data can also be transmitted from the dimmer to the console.

  According to the invention of claim 3, each wireless slave unit monitors the idle time until the next dimming control signal is input after the time obtained by multiplying the wireless ID number by a predetermined time. Since data is transmitted, even if it is a dimming control system consisting of a plurality of wireless slave units for one wireless master unit, the transmission time overlaps from each dimmer to the dimming operation means. The monitoring data can be transmitted properly without doing so.

  According to the fourth aspect of the present invention, the wireless master device recognizes a wireless slave device that can wirelessly communicate with the wireless master device when the power is turned on, so that a dimmer capable of dimming control can be determined at present. In addition, an appropriate frequency channel can be automatically set from the wireless master device to the wireless slave device.

  FIG. 1 is a configuration diagram in which a wireless transmission / reception apparatus according to an embodiment of the present invention is applied to a dimming control system. In FIG. 1, the control target is a lighting load, and the control signal is a dimming control signal output from the dimming operation means. Further, a case is shown in which a dimming control signal is transmitted from the wireless master device to a plurality of wireless slave devices.

  In FIG. 1, the wireless transmission / reception apparatus includes a wireless master device 11 and wireless slave devices 12a to 12n. The wireless slave device 11 transmits a dimming control signal to the wireless slave devices 12a to 12n, and the wireless slave devices 12a to 12n. Monitoring data is transmitted to the wireless master unit 11.

  A dimming operation means 13 is connected to the wireless master device 11, and dimmers 14a to 14n are connected to the wireless slave devices 12a to 12n, and lighting loads 15a to 14n are connected to the dimmers 14a to 14n. 15n is connected. The dimming operation means 13 outputs a dimming control signal for dimming control of the lighting loads 14a to 14n to the wireless master unit 11, and the wireless master unit 11 converts the dimming control signal input from the dimming operation means 13 into a radio signal. To the wireless slave units 12a to 12n.

  The wireless master device includes a CPU 16 and a wireless module transmission / reception unit 17. When a dimming control signal is input from the dimming operation unit 13, the wireless master device transmits the dimming control signal via the wireless module transmission / reception unit 17. Here, although the dimming control signal normally includes 512 dimming level data at the maximum, not all 512 are used depending on the dimming control system. For example, when the dimming level used is half of the maximum, the time for transmitting an effective dimming control signal is half. That is, in the wireless transmission between the wireless master device 11 and the wireless slave devices 12a to 12n, only the dimming control signals for the dimmers 14a to 14n connected to the wireless slave devices 12a to 12n from the overall configuration of the dimming control system. send.

  Therefore, the CPU 16 transmits dimming control signals for the dimmers 14a to 14n connected to the wireless slave units 12a to 12n to the wireless slave units 12a to 12n via the wireless module transmission / reception means 17. The CPU 16 sets the reception mode from the time required for transmitting the dimming control signal for the dimmer until the next dimming control signal is input. In this manner, a free time for receiving monitoring data from the wireless slave units 12a to 12n is ensured during the reception mode.

  Similarly to the wireless master device 11, the wireless slave devices 12 a to 12 n have CPUs 18 a to 18 n and wireless module transmission / reception means 19 a to 19 n, and receive a dimming control signal from the wireless master device 11 via the wireless module transmission / reception means 19 a to 19 n. Receive. The CPUs 18a to 18n of the wireless slave devices 12a to 12n are normally set in the transmission mode, receive the dimming control signal from the wireless master device 11, and transmit the received dimming control signal to the dimmers 14a to 14n. Thus, the dimmers 14a to 14n perform dimming control on the illumination loads 15a to 15n.

  Further, after receiving the dimming control signal from the wireless master device 11, the CPUs 18a to 18n switch the mode of the wireless master devices 12a to 12n from the reception mode to the transmission mode. While the wireless slave devices 12a to 12n are in the transmission mode, the wireless master device 11 is in the reception mode. Then, the monitoring data from the dimmers 14 a to 14 n is transmitted to the wireless master device 11 during the transmission mode.

  In this way, only the dimming control signals for the dimmers 14a to 14n connected to the wireless slave units 12a to 12n are sent from the overall configuration of the dimming control system to ensure the transmission time of the monitoring data. Then, by transmitting the monitoring data from the wireless slave units 14a to 14n to the wireless master unit 11 at that time, the dimming control and the collection of the monitoring data are realized without impairing the real-time property of the dimming control signal.

  FIG. 2 is a time chart showing the transmission / reception timing of the wireless transmission / reception apparatus according to the embodiment of the present invention. FIG. 2 shows a case where there are three wireless slave units 12. Assuming that the wireless master device 11 starts transmitting only the dimming control signal for the dimmer that is the subject of dimming control at time t0, each of the wireless slave devices 12a to 12c transmits the dimming control signal at time t1. Start receiving. If the wireless master device 11 completes the transmission of the dimming control signal for the dimmer that is the dimming control target at time t2, each of the wireless slave devices 12a to 12c receives the dimming control signal at time t3. Complete reception. At this time t3, the wireless master device 11 switches the mode from the transmission mode to the reception mode.

  Here, the dimming control signal is periodically transmitted from the wireless master device 11, but the cycle of transmitting the dimming control signal from the wireless master device 11 to the wireless slave devices 12a to 12b is the same as that of the dimming control signal. This is a cycle in which 512 pieces of maximum dimming level data can be transmitted. Therefore, since the dimming level data of only the dimming control signal for the dimmer that is the dimming control target is less than the maximum 512, the free time T is secured until the next dimming control signal is transmitted. it can.

  During this idle time T, monitoring data is transmitted from the wireless slave devices 12 a to 12 c to the wireless master device 11. That is, when the wireless slave unit 12a completes reception of the dimming control signal at time t3, the mode is switched from the reception mode to the transmission mode, monitoring data is transmitted during the transmission time T11, and then the mode is received from the transmission mode. Switch to mode. Similarly, when the wireless slave unit 12b completes reception of the dimming control signal at time point t3, the mode is switched from the reception mode to the transmission mode, monitoring data is transmitted during the transmission time T12, and then the mode is switched from the transmission mode. Switch to receive mode. Similarly, when reception of the dimming control signal is completed at time t3, the wireless slave unit 12c switches the mode from the reception mode to the transmission mode, transmits monitoring data during the transmission time T13, and then switches the mode from the transmission mode. Switch to receive mode. The wireless master device 11 receives the monitoring data transmitted from the wireless slave devices 12a to 12c during the times T11 ', T12', and T13 ', respectively.

  As described above, when the wireless master device 11 receives the monitoring data from each of the wireless slave devices 12a to 12c, the reception time is shifted. This is because the monitoring data can be transmitted without overlapping the transmission time from the wireless slave devices 12a to 12c to the wireless master device 11.

  The time difference between the transmission times T11 to T13 is set by, for example, a time obtained by multiplying the wireless ID numbers of the wireless slave devices 12a to 12c by a predetermined time. That is, since the plurality of wireless slave units 12a to 12c can be identified by setting different ID numbers for one wireless master unit 11, the ID number is multiplied by a certain time T0. To determine the transmission timing. For example, the wireless slave device 12a whose ID number is “1” transmits monitoring data at the timing of 1 × T0, and the wireless slave device 12b whose ID number is “2” transmits the monitoring data at the timing of 2 × T0. Send. Thereby, the monitoring data can be transmitted from each of the wireless slave devices 12a to 12c to the wireless master device 11 without overlapping the transmission time.

  The monitoring data transmitted to the wireless master device 11 is transmitted to the dimming operation means 13 and displayed and output as necessary. Thereby, the monitoring data from each of the dimmers 14a to 14b can be monitored by the dimming operation means 13.

  In the above description, the case of three wireless slave units 12a to 12c has been described, but the same applies to the case of three or more wireless slave units 12a to 12n. In addition, the case where the dimming control signal is transmitted from the wireless master device 11 to the wireless slave devices 12a to 12n has been described. However, the wireless dimming control signal from the wireless master device 11 to the wireless slave devices 12a to 12n is wirelessly connected. You may make it include the setting information of machine 12a-12n and dimmers 14a-14n. In this case, since the setting on the side of the wireless slave units 12a to 12n can be performed from the wireless master unit 11, the setting effort on the side of the wireless slave units 12a to 12n can be reduced, and the operation is simplified.

  Next, FIG. 3 is an external configuration diagram of the dimming operation means 13 incorporating the wireless master device 11. The dimming operation means 13 is provided with a plurality of faders 20 for setting dimming control signals, and the wireless master device 11 is built in and attached to the dimming operation means 13. The antenna 21 of the wireless master device 11 is mounted in the mounting groove 22, and the upper portion of the mounting groove 22 is cut away. As a result, the antenna 21 can be rotated by 180 °. That is, in FIG. 3, the antenna 21 stands in the vertical direction, but can rotate 90 ° in the direction of the mounting groove 22, and can further rotate 90 ° toward the inside of the mounting groove 22.

  Since the wireless master device 11 is built in the console 13 and the use of the wireless master device 11 is limited to transmission / reception of dimming control signals and monitoring data, the configuration of the dimming control system can be simplified, and even a non-expert It can be installed easily and quickly.

  FIG. 4 is an external configuration diagram of the dimmer 14 equipped with the wireless slave unit 12. A wireless slave unit 12 is mounted on the dimmer 14. The antenna 23 of the wireless slave device 12 is mounted in the mounting groove 24, and the mounting groove 22 is open. As a result, the antenna can be rotated 180 °. That is, in FIG. 4, the antenna 21 is directed rightward, but can be rotated by 90 ° in the left-right direction. Although FIG. 4 shows the case where the wireless slave device 12 is mounted on the dimmer 14, the wireless slave device 12 may be built in the dimmer 14.

  Next, the function of searching for the frequency channel of the wireless master device 11 will be described. The wireless master device 11 recognizes the wireless slave device 12 that can wirelessly communicate with the wireless master device 11 when the power is turned on, and confirms the dimmer 14 capable of dimming control at present. In addition, an appropriate frequency channel is automatically set from the wireless master device 11 to the wireless slave devices 12a to 12n.

  FIG. 5 is a configuration diagram of the dimming control system showing an operation when recognizing the wireless slave device 12 capable of wireless communication with the wireless master device 11. When the power is turned on, the wireless master device 11 wirelessly transmits a plurality of wireless slave devices by sequentially switching frequency channels. Now, there are five wireless slave units 12a to 12e, three wireless slave units 12b, 12c and 12e are located within the wireless effective range 25, and two wireless slave units 12b and 12c are located outside the wireless effective range 25. Suppose that is located. The wireless master device 11 switches the frequency channel from channel 1 to m channel after power-on, and transmits empty channel confirmation data to the wireless slave devices 12a to 12e. Then, the wireless master device 11 waits for reception of channel data from each of the wireless slave devices 12a to 12e.

  First, the wireless master device 11 selects one channel as empty channel confirmation data and transmits it to each of the wireless slave devices 12a to 12n. The wireless master device 11 switches the mode to the reception mode after wirelessly transmitting empty channel confirmation data, and waits for a certain period of time to receive channel data from the wireless slave devices 12a to 12n. Thereafter, the wireless master device 11 is returned to transmission, and the frequency channel is sequentially switched to channel 2, channel 3 to channel m, and the same processing is performed.

  When the wireless slave devices 12a to 12n wirelessly receive the empty channel confirmation data, the wireless slave devices 12a to 12n are switched to the transmission mode, and after “ID number × predetermined time [s]”, the wireless slave devices 12a to 12n receive their channel data. The wireless slave devices 12a to 12n are switched to the reception mode. The channel data includes the ID numbers of the wireless slave units 12a to 12n, the set frequency channel, and the like.

  FIG. 6 is a configuration diagram of a dimming control system showing a result when the wireless master device 11 receives channel data from the wireless slave device 12. As shown in FIG. 6, the wireless master device 11 does not receive channel data from the wireless slave devices 12a and 12d outside the wireless effective range 25, but from the wireless slave devices 12b, 12c, and 12e within the wireless effective range 25. Receive channel data. For example, it is received that the frequency channels of the wireless slave units 12b and 12c are 2 channels and the frequency channel of the wireless slave unit 12e is 5 channels.

  As described above, the wireless master device 11 collects information on the number, ID number, and reception frequency of the wireless slave devices that can receive the radio transmitted by itself based on the channel data received from each of the wireless slave devices 12a to 12e. Then, the information is transmitted to the dimming operation means.

  The wireless master device 11 confirms the frequency channels in use by the wireless slave devices 12b, 12b, and 12e that can perform wireless communication, and acquires vacant frequency channels. For example, it is confirmed that the frequency channels in use are 2 channels and 5 channels, and the other 1 channel, 3 channels, 4 channels, and 5 channels to m channels are determined to be free frequency channels.

  Next, the wireless master device 11 selects an appropriate frequency channel Z from the free frequency channels, and wirelessly transmits the frequency channel data Z using the frequency channels being used by the wireless slave devices 12b, 12b, and 12e capable of wireless communication. Transmit, and the wireless master device 11 is switched to the reception mode. That is, the frequency channel is set to the Z channel, and channel confirmation data from the wireless slave units 12b, 12b, and 12e is waited. FIG. 7 shows that the frequency channel data Z is transmitted from the wireless master unit 11 to the wireless slave unit 12. It is a block diagram of the dimming control system which shows the state which exists.

  After receiving the frequency channel data, the wireless slave units 12b, 12b, and 12e change the frequency channel setting to the Z channel, switch the wireless slave units 12b, 12b, and 12e to the transmission mode, and set “ID number × arbitrary time [s ] After this, the channel data is transmitted to the wireless master device 11 and the wireless slave devices 12b, 12b, 12e are switched to the reception mode. FIG. 8 is a configuration diagram of the dimming control system showing a state in which channel data Z whose settings have been changed from the wireless slave devices 12b, 12b, and 12e to the wireless master device 11 is transmitted. FIG. 8 shows a case where Z = 1 as the frequency channel Z. That is, the frequency channels of the wireless slave units 12b, 12b, and 12e are changed to one channel.

  The wireless master device 11 starts wireless transmission of the dimming control signal if it is found that there is at least one wireless slave device whose setting has been changed to the frequency channel Z after a lapse of a certain time after transmission of the frequency channel data Z. . FIG. 9 is a configuration diagram of a dimming control system showing a state in which a dimming control signal is transmitted from the wireless master device 11 to the wireless slave devices 12b, 12b, and 12e after the frequency channel setting is changed.

  Thus, when the wireless master device 11 is turned on, the wireless slave devices 12a to 12n that can wirelessly communicate with the wireless master device 11 are recognized, and the information is displayed on the dimming operation means 13 on the wireless master device 11 side. By monitoring with the dimming operation means 13, the dimmers 14a to 14n that can be dimmed and controlled at present are determined. In addition, an appropriate frequency channel is automatically set for the wireless slave devices 12b, 12c, and 12e that can perform wireless communication from the wireless master device 11.

  According to the embodiment of the invention, since only the dimming control signal for the dimmer that is the dimming control target is transmitted, the next dimming control signal is input even if the wireless device has a low communication speed. Free time until In addition, each wireless slave unit transmits monitoring data after a lapse of time obtained by multiplying its own wireless ID number by a predetermined time during the idle time until the next dimming control signal is input. Even if it is a dimming control system consisting of multiple wireless slave units, the monitoring data is properly transmitted from each dimmer to the dimming operation means without duplication of transmission time. Can be transmitted. Furthermore, since the wireless master device recognizes a wireless slave device that can wirelessly communicate with the wireless master device when the power is turned on, a dimmer capable of dimming control can be determined at present. In addition, an appropriate frequency channel can be automatically set from the wireless master device to the wireless slave device.

The block diagram which applied the radio | wireless transmission / reception apparatus concerning embodiment of this invention to the light control system. The time chart which shows the transmission / reception timing of the radio | wireless transmission / reception apparatus concerning embodiment of this invention. The external appearance block diagram of the light control operation means incorporating the wireless main | base station in embodiment of this invention. The external appearance block diagram of the light control device which mounts the radio | wireless subunit | mobile_unit in embodiment of this invention. The block diagram of the light control system which showed the operation | movement in the case of recognizing the radio | wireless subunit | mobile_unit which can carry out radio | wireless communication with the radio | wireless main | base station in embodiment of this invention. The block diagram of the light control system which showed the result at the time of the wireless main | base station in embodiment of this invention receiving channel data from a wireless subunit | mobile_unit. The block diagram of the light control system which shows the state which is transmitting the frequency channel data Z from the wireless main | base station in the embodiment of this invention to the wireless sub_unit | mobile_unit. The block diagram of the light control system which shows the state which is transmitting the channel data which changed the setting from the radio | wireless subunit | mobile_unit to the radio | wireless parent | base station in embodiment of this invention. FIG. 3 is a configuration diagram of a dimming control system showing a state in which a dimming control signal is transmitted from the wireless master device to the wireless slave device after the frequency channel setting is changed in the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Wireless master unit, 12 ... Wireless slave unit, 13 ... Dimming operation means, 14 ... Dimmer, 15 ... Illumination load, 16 ... CPU, 17 ... Wireless module transmission / reception means, 18 ... CPU, 19 ... Radio module transmission / reception Means: 20 ... fader, 21 ... antenna, 22 ... mounting groove, 23 ... antenna, 24 ... mounting groove, 25 ... wireless coverage

Claims (4)

A wireless master device that transmits a control signal for controlling a control target and receives monitoring data, and a wireless slave device that receives a control signal from the wireless master device and transmits monitoring data related to control of the control target to the wireless master device And comprising:
The wireless master unit transmits and outputs a control signal for a control target, and sets a reception mode after the time required for transmission of the control signal until a next control signal is input. Receiving monitoring data from the wireless slave unit in between;
The wireless slave device switches to a transmission mode after receiving a control signal from the wireless master device, and transmits the monitoring data to the wireless master device during the reception mode of the wireless master device. . Dimming operation means for outputting a dimming control signal for dimming control of the illumination load;
A wireless master device that converts the dimming control signal input from the dimming operation means into a radio signal and transmits the radio control signal;
A wireless slave that receives a dimming control signal from the wireless master;
A dimmer that controls a lighting load based on a dimming control signal from the wireless slave unit and outputs monitoring data of itself and the lighting load to the wireless slave unit;
The wireless master unit transmits and outputs a dimming control signal for the dimmer that is a dimming control target, and the next dimming control signal is input after the time required for transmitting the dimming control signal has elapsed. A reception mode, and receiving monitoring data from the wireless slave unit during the reception mode;
The wireless slave device switches to a transmission mode after receiving a dimming control signal from the wireless master device, and transmits monitoring data from the dimmer to the wireless master device during the reception mode of the wireless master device. Dimming control system characterized by   A plurality of wireless slave devices each having a different ID number are provided for one wireless master device, and the wireless master device wirelessly switches to a reception mode after transmitting a dimming control signal. A function of receiving the monitoring data from the terminal and returning to the transmission mode after a predetermined time has elapsed, the wireless slave unit switching to the transmission mode after receiving the dimming control signal, and multiplying its wireless ID number by the predetermined time The dimming control system according to claim 2, wherein the monitoring data is transmitted after the elapse of time, and then the reception mode is restored.   When the power is turned on, the wireless master unit switches the frequency channel to a plurality of wireless slave units in order and transmits wirelessly, receives a response from the wireless slave unit, determines the usage status of the frequency channel, and is a free frequency channel. 4. The dimming control system according to claim 3, wherein the frequency channel is changed and set to one of the vacant frequency channels for the wireless slave unit that has responded.

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