JP6512509B2 - Motion detector and lighting system - Google Patents

Description

  The present invention relates to a moving body detection device and a lighting system, and more specifically, according to a detection result of a moving body detection device which detects a moving body in a detection range and transmits the detection result by a wireless signal. The present invention relates to a lighting system that controls lighting load.

  As a prior art example, the illumination system of patent document 1 is illustrated. The lighting system described in Patent Document 1 includes a plurality of lighting fixtures. Each lighting fixture includes a light source, a sensor, a wireless communication unit, a control unit, and the like. The sensor is a radio frequency Doppler sensor and is configured to detect a mobile body (for example, a vehicle traveling on a road) and output a detection signal. The wireless communication unit includes, for example, a specific low power wireless module, and is configured to perform wireless communication using a radio wave as a medium with a wireless communication unit included in another lighting apparatus. The control unit includes, for example, a microcomputer, and is configured to control (dimmish) the output of the light source based on the detection signal of the sensor or the detection signal received by the wireless communication unit.

  In the lighting system described in Patent Document 1, when a sensor of any lighting device detects a moving body (vehicle), at least a part of the other lighting devices is interlocked and controlled by a detection signal wirelessly transmitted from the lighting device. Configured to be.

JP, 2012-226993, A

  By the way, in the illumination system described in Patent Document 1, the frequency (for example, 24 [GHz]) of the radio wave used by the sensor and the frequency (for example, 920 [MHz]) of the radio wave used by the wireless communication unit are largely different. There is. Therefore, an oscillator and an antenna for the sensor, and an oscillator and an antenna for the wireless communication are separately required, making it difficult to miniaturize the lighting fixture (moving object detection device) and reduce the cost.

  This invention is made in view of the said subject, and it aims at achieving size reduction and cost reduction rather than before.

The moving object detection apparatus according to the present invention includes an oscillating unit that oscillates a carrier wave, an antenna that transmits and receives radio waves, a communication unit that performs wireless communication using the oscillating unit and the antenna, and the oscillating unit and the antenna. A detection unit for detecting a moving body, a switching unit for switching between a detection state in which the detection unit detects a moving body and a communication state in which the communication unit performs wireless communication, and alternately switching the detection state and the communication state A control unit that controls the switching unit, the control unit further, when the detection unit detects the moving body in the detection state, information related to the detection of the moving body in the communication state, the communication unit It is sent to the first hour and to maintain the detection state to the switching unit, and a second time for maintaining the communication state in the switching unit to change each, and, before according to the current time Characterized in that it is constituted of the first hour and the second hour so that change respectively.

A lighting system according to the present invention includes a plurality of moving body detection devices and a plurality of lighting devices, and each of the plurality of lighting devices includes a lighting load and a lighting control unit that controls the lighting load, The lighting control unit is electrically connected to at least one of the moving body detection devices, and when the detection unit of the moving body detection device detects the moving body, the information is wirelessly communicated with the other moving body detection devices. When acquired, it is configured to control the illumination load, and the control unit of the moving object detection device detects the moving object after the detection unit detects the moving object until the holding time elapses. Are configured to extend .
The illumination system according to the present invention further includes a plurality of moving object detection devices, a plurality of illumination devices, and a brightness detection unit that detects the brightness of the surroundings, and each of the plurality of illumination devices includes an illumination load and An illumination control unit configured to control the illumination load, wherein the illumination control unit is electrically connected to at least one moving body detection device, and the detection unit of the moving body detection device detects the moving body; When the information is acquired by wireless communication with another moving object detecting device, the illumination load is controlled, and the control unit of the moving object detecting device is detected by the brightness detecting unit. It is characterized in that it is configured to change the first time and the second time according to the brightness.

  The moving object detection device and the illumination system according to the present invention have an effect that downsizing and cost reduction can be achieved as compared with the prior art.

It is a block diagram showing a dynamic body detection device and an illuminating device concerning an embodiment. FIG. 2A is a block diagram showing a detection unit of the moving object detection device according to the embodiment, and FIG. 2B is a block diagram showing a communication unit of the moving object detection device according to the embodiment. FIG. 3A is a side view showing a use form of the illumination system according to the embodiment, and FIG. 3B is a plan view showing the use form of the illumination system according to the embodiment. It is a time chart for operation explanation of a lighting system concerning an embodiment. It is a system configuration figure of the lighting system concerning another embodiment. It is a block diagram which shows the communication part of the moving body detection apparatus which concerns on another embodiment.

  Hereinafter, a moving body detection device according to an embodiment and a lighting system according to the embodiment will be described in detail with reference to the drawings. However, the moving object detection device can also be used in a system other than the lighting system, for example, a crime prevention system or a system for monitoring traffic.

(Embodiment 1)
As shown in FIG. 1, the moving body detection device 1 according to the present embodiment includes an oscillation unit 10, an antenna 11, a communication unit 12, a detection unit 13, a first switching unit 14A, a second switching unit 14B, a control unit 15, and a power supply unit. 16 and so on. The oscillation unit 10 is configured to oscillate, for example, a carrier wave made of a sine wave alternating voltage. The frequency f0 of the carrier wave oscillated by the oscillation unit 10 is preferably, for example, 24 GHz. In addition, the antenna 11 is configured to emit a carrier wave as a radio wave and receive a radio wave in a frequency band including the frequency f0. Such an antenna 11 is preferably configured by, for example, a microstrip antenna (also referred to as a patch antenna).

  The first switching unit 14A has a common contact 140A, a first switching contact 141A, and a second switching contact 142A. The first switching unit 14A is configured to switch between a state in which the common contact 140A is electrically connected to the first switching contact 141A and a state in which the common contact 140A is electrically connected to the second switching contact 142A. Similarly, the second switching unit 14B includes a common contact 140B, a first switching contact 141B, and a second switching contact 142B. The first switching unit 14B is configured to switch between a state in which the common contact 140B is electrically connected to the first switching contact 141B and a state in which the common contact 140B is electrically connected to the second switching contact 142B. In addition, it is preferable that such a switch part (1st switch part 14A and 2nd switch part 14B) is comprised with an analog switch, for example.

  The common contact 140A of the first switching unit 14A is electrically connected to the output terminal of the oscillating unit 10. The common contact 140B of the second switching unit 14B is electrically connected to (the feed point of) the antenna 11.

  The control unit 15 is preferably configured by a microcontroller. The control unit 15 is preferably configured to execute various processes by executing a program stored in the memory of the microcontroller with a CPU (Central Processing Unit).

  The power supply unit 16 is configured to convert AC power supplied from the system power supply (commercial AC power supply) 6 into DC power. Then, the power supply unit 16 is configured to supply the converted DC power to the oscillation unit 10, the communication unit 12, the detection unit 13, the control unit 15, and the like as an operation power supply.

  As shown in FIG. 2A, the detection unit 13 includes a circulator 130, a mixer 131, a signal processing unit 132, an input terminal 133, an input / output terminal 134, and the like. The input terminal 133 is electrically connected to the second switching contact 142A of the first switching unit 14A. The input / output terminal 134 is electrically connected to the second switching contact 142B of the second switching unit 14B.

  The circulator 130 has a first terminal electrically connected to the input terminal 133, a second terminal electrically connected to the input / output terminal 134, and a third terminal electrically connected to the mixer 131. The circulator 130 is configured to output a signal input from the first terminal to the second terminal and output a signal input from the second terminal to the third terminal.

  The mixer 131 mixes (multiplies) the carrier wave input from the input terminal 133 and the signal (reception signal) input from the third terminal of the circulator 130. The mixer 131 is configured to output a signal (Doppler signal) fd (Doppler signal) of the difference (Doppler frequency) fd between the carrier frequency f0 and the received signal frequency f0 ± fd to the signal processing unit 132.

  The signal processing unit 132 compares the signal level of the Doppler signal input from the mixer 131 with a threshold, and indicates that a moving object is detected when the signal level of the Doppler signal is equal to or higher than the threshold (a moving object detection signal ) To the control unit 15.

  The detection unit 13 operates based on an instruction of the control unit 15 when a carrier wave is input from the input terminal 133. The detection unit 13 outputs the carrier wave input from the input terminal 133 to the antenna 11 from the input / output terminal 134, and causes the carrier 11 to radiate (transmit) the carrier wave as a radio wave. After transmitting the carrier wave from the antenna 11, the detection unit 13 interrupts the output of the carrier wave. The detection unit 13 mixes the reception signal (reflected wave reflected by the object) received by the antenna 11 with the carrier wave in the mixer 131 while interrupting the carrier wave output to obtain the Doppler signal. Then, the signal processing unit 132 compares the signal level of the Doppler signal with the threshold value, and the detection unit 13 detects the presence of a moving body (for example, a vehicle or a passerby) in the detection area.

  As shown in FIG. 2B, the communication unit 12 includes a modulation unit 120, a demodulation unit 121, a circulator 122, a communication processing unit 123, an input terminal 124, an input / output terminal 125, and the like. The input terminal 124 is electrically connected to the first switching contact 141A of the first switching unit 14A. The input / output terminal 125 is electrically connected to the first switching contact 141B of the second switching unit 14B.

  The modulation unit 120 is preferably configured to perform frequency shift keying on the carrier according to the communication signal (baseband signal) input from the communication processing unit 123. However, the modulation unit 120 may be configured to modulate the carrier according to a modulation scheme other than frequency shift keying, for example, a modulation scheme such as amplitude shift keying or phase shift keying.

  The first terminal of the circulator 122 is electrically connected to the output terminal of the modulation unit 120, the second terminal is electrically connected to the input / output terminal 125, and the third terminal is electrically connected to the input terminal of the demodulation unit 121. Connected The circulator 122 is configured to output a signal input from the first terminal to the second terminal and output a signal input from the second terminal to the third terminal.

  The demodulation unit 121 is configured to input a reception signal received by the antenna 11 from the third terminal of the circulator 122. The demodulation unit 121 is configured to demodulate the communication signal from the reception signal modulated by the same method (for example, frequency shift keying) as the modulation method of the modulation unit 120. The demodulation unit 121 outputs the demodulated communication signal to the communication processing unit 123.

  The communication processing unit 123 is configured to perform transmission processing and reception processing based on an instruction of the control unit 15. In the transmission process, the communication processing unit 123 encodes transmission data supplied from the control unit 15 to generate a communication signal, and operates to pass the generated communication signal to the modulation unit 120. Further, in the reception process, the communication processing unit 123 operates to decode reception data from the communication signal input from the demodulation unit 121 and to pass the decoded reception data to the control unit 15.

  The moving body detection apparatus 1 of this embodiment comprises an illumination system with the illuminating device 2 as shown in FIG. The lighting device 2 includes a lighting load 20 and a lighting control unit 21. The lighting load 20 is preferably configured of, for example, an LED module having a plurality of light emitting diodes. However, the illumination load 20 is not limited to the LED module, and may be a discharge lamp such as a high intensity discharge lamp.

  The illumination control unit 21 is configured to turn on the illumination load 20 by converting AC power supplied from the system power supply 6 into DC power and supplying the DC power. Further, preferably, the illumination control unit 21 is configured to perform blinking control (on / off control) and dimming control of the illumination load 20 according to a control signal received from the control unit 15 of the moving object detection device 1.

  Here, as shown in FIG. 3A, the lighting device 2 of the present embodiment is preferably attached to the tip of the lighting pole 5. The illumination poles 5 are, for example, equally spaced along the road. However, in the following description, in FIGS. 3A and 3B, the illumination pole 5 at the left end may be described as 5A, the illumination pole 5 at the center may be described as 5B, and the illumination pole 5 at the right end may be described as 5C.

  It is preferable that two moving object detection apparatuses 1 according to the present embodiment be attached to each of the plurality of illumination poles 5 (5A to 5C). However, in each of the illumination poles 5A to 5C, the two moving body detection devices 1 attached to the same illumination pole 5 are adjacent to the illumination pole 5 in the communication range of the communication unit 12 and the detection range of the detection unit 13. It is preferable to arrange | position so that the moving body detection apparatus 1 attached may be included. 3A shows a side view seen from the horizontal direction, and FIG. 3B shows a plan view seen from the vertical direction. Further, ranges S1 and S2 surrounded by broken lines in FIG. 3A and FIG. 3B indicate communication ranges and detection ranges (hereinafter simply referred to as ranges) of each moving body detection device 1.

  Each lighting device 2 is preferably electrically connected to two moving body detection devices 1 attached to the same lighting pole 5. For example, the illumination control unit 21 of the illumination device 2 attached to the illumination pole 5A at the left end in FIG. 3A, and the control units 15 of the two moving object detection devices 1 attached to the illumination pole 5A at the left end. Are electrically connected by communication lines, respectively. Furthermore, in two moving body detection devices 1 attached to the same illumination pole 5, each control unit 15 is configured to be able to receive moving body detection signals output from the detection units 13 of each other.

  Here, it is preferable that a photoelectric type automatic blinker is provided on a power feeding path from the system power supply 6 to each of the lighting control units 21. The photoelectric type automatic blinker closes the feeding path when the illuminance of natural light falls below the lighting illuminance and supplies power from the system power source 6 to the illumination control unit 21 and opens the feeding path when the illuminance of natural light exceeds the lighting out illuminance. It is comprised so that the electric power feeding from 6 to the illumination control part 21 may be stopped. Therefore, each lighting device 2 is turned off during the daytime when the surroundings are bright, and is automatically turned on from the evening to the morning when the surroundings become dark. However, each lighting device 2 may be configured to automatically blink according to the current time, not the ambient brightness.

  Next, as shown in FIGS. 3A and 3B, two moving object detection devices 1 and one lighting device 2 are attached to the plurality of lighting poles 5A to 5C, which are erected along the road. In this case, operations of the moving object detection device 1 and the illumination system of the present embodiment will be described. However, in FIG. 3B, roads exist below the illumination poles 5A to 5C.

  3A and 3B, the illumination device 2 attached to the illumination pole 5A at the left end is “2A”, the illumination device 2 attached to the central illumination pole 5B is “2B”, for illumination at the right end The lighting device 2 attached to the pole 5C is referred to as "2C". Further, the moving body detection device 1 attached to the left side of the illumination pole 5A at the left end is referred to as “1AL”, and the moving body detection device 1 attached to the right side is referred to as “1AR”. Similarly, the moving object detection device 1 attached to the left of the central illumination pole 5B is referred to as "1BL", and the moving object detection device 1 attached to the right is referred to as "1BR". Then, the moving body detection device 1 attached to the left side of the rightmost illumination pole 5C is referred to as “1CL”, and the moving body detection device 1 attached to the right side is referred to as “1CR”.

  For example, assume that after sunset, a vehicle such as a car is traveling from left to right in FIGS. 3A and 3B. When the vehicle enters the range S1 of the moving body detection device 1AL attached to the left side of the illumination pole 5A at the left end, the detection unit 13 of the left moving body detection device 1AL detects the vehicle (moving body). Output motion detection signal. The moving body detection signal is input not only to the control unit 15 of the left moving body detection apparatus 1AL but also to the control unit 15 of the right moving body detection apparatus 1AR attached to the same illumination pole 5A.

  When each control unit 15 of the two moving body detection devices 1AL and 1AR receives the moving body detection signal, the control signal 15 instructs the illumination control unit 21 of the illumination device 2A to fully light the illumination load 20 1) Send control signal). Also, each control unit 15 starts counting down the holding time using a timer of a microcontroller. Furthermore, each control unit 15 outputs transmission data (moving object detection data) for notifying of moving object detection to the communication processing unit 123 of each communication unit 12. Each communication processing unit 123 encodes the moving body detection data received from the control unit 15 to generate a communication signal, and outputs the communication signal to the modulation unit 120. Each modulation unit 120 modulates the carrier wave with the communication signal, and outputs the modulated carrier wave (modulated signal) to the first terminal of the circulator 122. The circulator 122 outputs the modulation signal input to the first terminal to the second terminal. The modulated signal output from the second terminal is input to the feeding point of the antenna 11, and is radiated (transmitted) as a radio wave (radio signal) from the antenna 11 (see FIG. 2B).

  Here, when the vehicle is not passing, it is preferable that the lighting control unit 21 of each of the lighting devices 2A to 2C turn on (light control lighting) by reducing the light flux of the lighting load 20 compared to the time of full lighting. Then, when the illumination control unit 21 receives the first control signal from the moving object detection device 1, the illumination control unit 21 causes the illumination load 20 to be fully lit.

  In addition, the wireless signal transmitted from the antenna 11 of the communication unit 12 of the moving object detection device 1AR on the right side is received by the two moving object detection devices 1BL and 1BR of the illumination pole 5B adjacent to the right (center). Ru. The radio signal received by the antenna 11 is input to the demodulation unit 121 via the circulator 130 as a reception signal. The demodulation unit 121 demodulates the communication signal from the reception signal and outputs the communication signal to the communication processing unit 123. The communication processing unit 123 decodes the original data (moving object detection data) from the communication signal and outputs the data to the control unit 15. When receiving the moving body detection data, the control unit 15 transmits a first control signal to the illumination control unit 21 of the illumination device 2B. Therefore, in the lighting device 2 of the central lighting pole 5B, the lighting control unit 21 turns on the lighting load 20 altogether. Furthermore, the control unit 15 starts the countdown of the holding time using a timer of the microcontroller, and outputs moving body detection data to the communication processing unit 123 of the communication unit 12. The communication processing unit 123 encodes the moving body detection data received from the control unit 15 to generate a communication signal, and outputs the communication signal to the modulation unit 120. The modulation unit 120 modulates the carrier wave with the communication signal, and outputs the modulated carrier wave (modulated signal) to the first terminal of the circulator 122. The circulator 122 outputs the modulation signal input to the first terminal to the second terminal. The modulated signal output from the second terminal is input to the feeding point of the antenna 11, and is radiated (transmitted) as a radio wave (radio signal) from the antenna 11 (see FIG. 2B).

  The wireless signal transmitted from the antenna 11 of the communication unit 12 of the moving body detection device 1BR on the right side of the central illumination pole 5B is the two moving body detection devices 1CL and 1CR of the illumination pole 5C next to the right (right end) 11 are received respectively. Then, as described above, in the illumination device 2C of the illumination pole 5C at the right end, the illumination control unit 21 turns on the illumination load 20 altogether. As a result, the lighting devices 2A to 2C attached to the three lighting poles 5A to 5C interlock and all light up.

  When the control unit 15 of each moving body detection device 1 receives a moving body detection signal during countdown of the holding time, the control unit 15 restarts the countdown of the holding time. On the other hand, when the control unit 15 of each moving object detection device 1 ends the countdown of the holding time, the control signal for instructing the illumination control unit 21 of the illumination device 2 to dim the illumination load 20 2) Send control signal). When the illumination control unit 21 receives the second control signal from the moving object detection device 1, the illumination control unit 21 reduces the DC power supplied to the illumination load 20 and returns the light to the dimming control state from the full lighting state.

  Here, the control unit 15 of the moving object detection device 1 controls the first switching unit 14A and the second switching unit 14B so that the detection unit 13 detects a moving object, and the communication unit 12 performs wireless communication (transmission or Communication state to be received) is switched alternately. For example, as shown in FIG. 4, the control unit 15 switches the common contacts 140A and 140B of the first switching unit 14A and the second switching unit 14B to the first switching contacts 141A and 141B, and then the predetermined detection time T1 is The detection unit 13 is instructed to maintain the detection state until the lapse of time. The detection unit 13 operates based on an instruction of the control unit 15 during the detection time T1.

  When the detection time T1 has elapsed, the control unit 15 instructs the detection unit 13 to stop the operation, and then the common contacts 140A and 140B of the first switching unit 14A and the second switching unit 14B are switched to the second switching contact 142A, Switch to 142B. When the carrier wave is input from the oscillation unit 10, the communication unit 12 operates based on an instruction of the control unit 15, and transmits the first control signal input from the control unit 15 as a wireless signal. However, if the detection unit 13 does not detect a moving object within the immediately preceding detection time T1, the control unit 15 instructs the communication unit 12 to wait for reception without performing transmission processing. Then, the control unit 15 stops the communication unit 12 when a predetermined communication time T2 elapses after switching to the communication state.

  By the way, in the illumination system of the present embodiment, the ranges S1 and S2 of the moving object detection devices 1 attached to the adjacent illumination poles 5 partially overlap each other. Therefore, for example, the time when the moving body detection device 1AL, 1AR performs detection and communication (detection time T1, communication time T2), and the time when the moving body detection device 1BL, 1BR performs detection and communication (transmission) (detection time T1, communication It is preferable that time T2 does not overlap (see FIG. 4).

  Therefore, it is preferable that the control unit 15 of each moving body detection device 1 be configured to detect the zero cross of the system power supply 6 and synchronize a timer (a timer built in a microcontroller) starting from the zero cross. For example, as shown in FIG. 4, each control unit 15 of the moving body detection devices 1AL and 1AR and each control unit 15 of the moving body detection devices 1CL and 1CR are the first switching unit 14A and the second switching unit at time t = t1. 14B is switched to the detection state, and the detection unit 13 is instructed to detect a moving body. On the other hand, each control unit 15 of the moving body detection devices 1BL and 1BR switches the first switching unit 14A and the second switching unit 14B to the detection state at time t = t1, but instructs the detection unit 13 not to detect the moving body.

  At the time (time t = t2) when the detection time T1 has elapsed from time t = t1, the control units 15 of the moving object detection devices 1AL and 1AR and the control units 15 of the moving object detection devices 1CL and 1CR are the first switching unit 14A and the second switching unit 14B are switched to the communication state. Then, each control unit 15 instructs the communication unit 12 to transmit a wireless signal including moving object detection data if the detecting unit 13 detects a moving object within the immediately preceding detection time T1. However, each control unit 15 instructs the communication unit 12 to wait for reception of a wireless signal, if the detection unit 13 does not detect a moving object within the immediately preceding detection time T1. On the other hand, each control unit 15 of the moving body detection devices 1BL and 1BR switches the first switching unit 14A and the second switching unit 14B to the communication state at time t = t2 and instructs the communication unit 12 to wait for reception of the radio signal. .

  When communication time T2 has elapsed from time t = t2 (time t = t3), the control units 15 of the moving object detection devices 1AL and 1AR and the control units 15 of the moving object detection devices 1CL and 1CR are the first switching unit 14A and the second switching unit 14B are switched to the detection state. However, each control unit 15 instructs the detection unit 13 not to detect a moving body. On the other hand, each control unit 15 of the moving body detection devices 1BL and 1BR switches the first switching unit 14A and the second switching unit 14B to the detection state at time t = t3 and instructs the detection unit 13 to detect the moving body.

  At a time (time t = t4) when the detection time T1 has elapsed from time t = t3, the control units 15 of the moving object detection devices 1BL and 1BR switch the first switching unit 14A and the second switching unit 14B to the communication state. Then, each control unit 15 instructs the communication unit 12 to transmit a wireless signal including moving object detection data if the detecting unit 13 detects a moving object within the immediately preceding detection time T1. However, each control unit 15 instructs the communication unit 12 to wait for reception of a wireless signal, if the detection unit 13 does not detect a moving object within the immediately preceding detection time T1. On the other hand, the control units 15 of the moving body detection devices 1AL and 1AR and the control units 15 of the moving body detection devices 1CL and 1CR switch the first switching unit 14A and the second switching unit 14B to the communication state at time t = t4. It instructs the communication unit 12 to wait for reception of a radio signal.

  When communication time T2 has elapsed from time t = t4 (time t = t5), each control unit 15 of the moving object detection devices 1BL and 1BR switches the first switching unit 14A and the second switching unit 14B to the detection state. However, each control unit 15 instructs the detection unit 13 not to detect a moving body. On the other hand, the control units 15 of the moving body detection devices 1AL and 1AR and the control units 15 of the moving body detection devices 1CL and 1CR switch the first switching unit 14A and the second switching unit 14B to the detection state at time t = t3. The detection unit 13 is instructed to detect a moving object.

  At the time (time t = t6) when the detection time T1 has elapsed from time t = t5, the control units 15 of the moving object detection devices 1AL and 1AR and the control units 15 of the moving object detection devices 1CL and 1CR are the first switching units. 14A and the second switching unit 14B are switched to the communication state. Then, each control unit 15 instructs the communication unit 12 to transmit a wireless signal including moving object detection data if the detecting unit 13 detects a moving object within the immediately preceding detection time T1. However, each control unit 15 instructs the communication unit 12 to wait for reception of a wireless signal, if the detection unit 13 does not detect a moving object within the immediately preceding detection time T1. On the other hand, each control unit 15 of the moving body detection devices 1BL and 1BR switches the first switching unit 14A and the second switching unit 14B to the communication state at time t = t6 and instructs the communication unit 12 to wait for reception of radio signals. .

  When communication time T2 has elapsed from time t = t6 (time t = t7), the control units 15 of the moving object detection devices 1AL and 1AR and the control units 15 of the moving object detection devices 1CL and 1CR are the first switching unit 14A and the second switching unit 14B are switched to the detection state. However, each control unit 15 instructs the detection unit 13 not to detect a moving body. On the other hand, each control unit 15 of the moving body detection devices 1BL and 1BR switches the first switching unit 14A and the second switching unit 14B to the detection state at time t = t7 and instructs the detection unit 13 to detect the moving body.

  At a time (time t = t8) when the detection time T1 has elapsed from time t = t7, the control units 15 of the moving object detection devices 1BL and 1BR switch the first switching unit 14A and the second switching unit 14B to the communication state. Then, each control unit 15 instructs the communication unit 12 to transmit a wireless signal including moving object detection data if the detecting unit 13 detects a moving object within the immediately preceding detection time T1. However, each control unit 15 instructs the communication unit 12 to wait for reception of a wireless signal, if the detection unit 13 does not detect a moving object within the immediately preceding detection time T1. On the other hand, the control units 15 of the moving body detection devices 1AL and 1AR and the control units 15 of the moving body detection devices 1CL and 1CR switch the first switching unit 14A and the second switching unit 14B to the communication state at time t = t8, It instructs the communication unit 12 to wait for reception of a radio signal.

  When each moving body detection device 1AL, 1AR, 1BL, 1CL, 1CR operates as described above, a collision between radio waves for moving body detection, a collision between radio waves for wireless communication, and a radio wave for moving body detection It is possible to avoid collision of radio waves for wireless communication. The detection time T1 and the communication time T2 are preferably set to, for example, 200 milliseconds and 300 milliseconds, respectively.

  Here, it is preferable that each control unit 15 dynamically change the detection time T1 and the communication time T2 (particularly, the communication time T2). For example, while the control unit 15 counts down the holding time, the necessity of causing the detecting unit 13 to detect a moving object is considered to decrease, so the control unit 15 extends the communication time T2 during the holding time countdown. Is preferred. For example, when the holding time is not counted down, the control unit 15 sets the detection time T1 to 200 milliseconds and the communication time T2 to 300 milliseconds. During the holding time countdown, the detection time T1 is 200 milliseconds, and the communication time T2 is Should be 1300 ms. By thus extending the communication time T2, it is possible to improve the reliability of communication. However, these figures (time) are just an example.

  Moreover, it is preferable that the control part 15 of the moving body detection apparatus 1 makes only the detection part 13 operate intermittently, and makes the communication part 12 rest in the daytime where the illumination of the illuminating device 2 is unnecessary. Then, in the daytime, the control unit 15 may store in the memory (memory of the micro controller) the history of the moving body detection signal output from the detection unit 13 (time, frequency, etc. when the moving body detection signal is input). preferable. Furthermore, it is preferable that the control unit 15 causes the communication unit 12 to transmit history data stored in the memory when a preset time (timed) is reached. In addition, it is preferable that this on-time be normally set in a time zone (for example, midnight) in which the traffic volume is minimized. Alternatively, if a time zone in which the traffic volume is the smallest is detected based on the history of moving object detection signals up to the previous day, a fixed time may be set in the detected time zone. In addition, the history of the moving body detection signal transmitted from each moving body detection device 1 is sent to a server installed by a road administrator (for example, a country or a local public entity etc.) and collectively managed by the server Is preferred. The server can, for example, investigate and analyze weekly and monthly traffic volumes based on the history of moving object detection signals. Preferably, the control unit 15 determines whether it is daytime based on the current time measured by an RTC (Real Time Clock) built in the microcontroller. The control unit 15 may determine whether it is daytime based on the power supply state by the photoelectric type automatic blinker. Alternatively, a wireless signal may be transmitted from the server to each moving object detection device 1, and each control unit 15 may determine that it is daytime when the wireless signal is received by the communication unit 12.

  Here, the illumination system of the present embodiment may have the server 3 and the brightness detection unit 4 as shown in FIG. The brightness detection unit 4 detects the outdoor brightness (illuminance of natural light) and compares it with a threshold, and outputs the brightness detection signal to the server 3 when the illuminance of natural light is equal to or higher than the threshold. It is preferred to be configured. When the brightness detection signal is input from the brightness detection unit 4, the server 3 notifies each moving object detection device 1AL, ... that it is daytime, and the brightness detection signal is not input from the brightness detection unit 4 It is preferable to notify each moving object detection device 1AL,. It is preferable that the control unit 15 of each of the moving body detection devices 1AL,... Change the detection time T1 and the communication time T2 based on the notification from the server 3. It is preferable that the control unit 15 of each of the moving body detection devices 1AL,... Transmit the history data stored in the memory to the communication unit 12 when notified of the daytime from the server 3.

  As described above, the moving object detection device 1 according to the present embodiment includes the oscillation unit 10 that oscillates a carrier wave, the antenna 11 that transmits and receives radio waves, and the communication unit 12 that performs wireless communication using the oscillation unit 10 and the antenna 11 Equipped with Also, the moving body detection device 1 switches between a detection unit 13 that detects a moving body using the oscillation unit 10 and the antenna 11, a detection state in which the detection unit 13 detects a moving body, and a communication state in which the communication unit 12 performs wireless communication. And a switching unit (a first switching unit 14A and a second switching unit 14B). Furthermore, the moving body detection device 1 includes the control unit 15 that controls the switching unit (the first switching unit 14A and the second switching unit 14B) so as to switch the detection state and the communication state alternately. Furthermore, when the detection unit 13 detects a moving body in the detection state, the control unit 15 is configured to cause the communication unit 12 to transmit information related to detection of the moving body (moving body detection data) in the communication state.

  Further, the lighting system of the present embodiment includes a plurality of moving body detection devices 1 and a plurality of lighting devices 2. Each of the plurality of lighting devices 2 includes a lighting load 20 and a lighting control unit 21 that controls the lighting load 20. The illumination control unit 21 is electrically connected to at least one moving object detection device 1. In addition, when the detection unit 13 of the moving object detection device 1 detects a moving object, and when the information (moving object detection data) is acquired by wireless communication with another moving object detection device 1, the illumination control unit 21 performs the illumination load 20. Configured to control

  The moving object detection device 1 and the illumination system according to the present embodiment are configured as described above, and the oscillation unit 10 and the antenna 11 are shared by the communication unit 12 and the detection unit 13. Can.

  Further, in the moving object detection device 1 of the present embodiment, the control unit 15 changes the first time (detection time T1) for causing the switching unit (the first switching unit 14A and the second switching unit 14B) to maintain the detection state. It is preferable to be configured. Furthermore, it is preferable that the control unit 15 is configured to change a second time (communication time T2) for causing the switching unit (the first switching unit 14A and the second switching unit 14B) to maintain the communication state.

  If the moving object detection device 1 of this embodiment is configured as described above, the communication time of the communication unit 12 can be reliably changed by changing the first time (detection time T1) and the second time (communication time T2). It is possible to improve and to improve the certainty of detection of the detection unit 13 and the like.

  Furthermore, in the moving object detection device 1 of the present embodiment, the control unit 15 is configured to change the first time (detection time T1) and the second time (communication time T2) according to the current time. preferable.

  If the moving body detection device 1 of the present embodiment is configured as described above, detection of the moving body and communication can be appropriately performed according to the time zone.

  In the illumination system according to the present embodiment, the control unit 15 of the moving object detection device 1 may be configured to perform the following operation until the holding time elapses after the detection unit 13 detects the moving object. preferable. The control unit 15 is preferably configured to extend a second time (communication time T2) for causing the switching unit (the first switching unit 14A and the second switching unit 14B) to maintain the communication state.

  If the lighting system of the present embodiment is configured as described above, power consumption can be reduced by not causing the detection unit 13 to perform unnecessary detection.

  Moreover, in the illumination system of this embodiment, it is preferable to include the brightness detection unit 4 that detects the brightness of the surroundings. The control unit 15 of the moving object detection device 1 makes the switching unit (the first switching unit 14A and the second switching unit 14B) maintain the detection state according to the brightness detected by the brightness detection unit 4 (the first time ( Preferably, it is arranged to change the detection time T1). Furthermore, the control unit 15 of the moving object detection device 1 causes the switching unit (the first switching unit 14A and the second switching unit 14B) to maintain the communication state according to the brightness detected by the brightness detection unit 4. Preferably, it is configured to change the time (communication time T2).

  If the lighting system of the present embodiment is configured as described above, it is possible to appropriately perform detection of a moving object and communication according to the necessity of the lighting of the lighting device 2.

  Furthermore, in the illumination system of the present embodiment, the control unit 15 of the moving object detection device 1 transmits information to be transmitted to the communication unit 12 according to the frequency (the number of times detected per unit time) that the detection unit 13 detects a moving object. Preferably, it is configured to change. Alternatively, it is preferable that the control unit 15 of the moving body detection device 1 is configured to change the information to be transmitted to the communication unit 12 according to the brightness detected by the brightness detection unit 4.

  The lighting system of the present embodiment is configured as described above. For example, when the history of moving object detection and the like are transmitted when traffic is heavy or bright, survey and analysis of traffic can be performed.

  By the way, there are cases where the frequency of the carrier wave is limited depending on the application, and the communication unit 12 and the detection unit 13 can not share the carrier wave of the same frequency. In such a case, it is preferable that at least one of the communication unit 12 and the detection unit 13 (for example, the communication unit 12) be provided with a frequency conversion unit 126 for converting the frequency f0 of the carrier wave to another frequency (FIG. 6) reference). The frequency converter 126 preferably includes, for example, a local oscillator and a mixer. The local oscillator is preferably configured to oscillate an AC voltage of a frequency f1 different from the oscillation frequency f0 of the oscillation unit 10. The mixer mixes the carrier wave (frequency f0) input from the oscillation unit 10 and the AC voltage input from the local oscillator to generate an AC voltage of the frequency (f0−f1) or sum (f0 + f1) difference between the frequencies f0 and f1. Preferably, it is configured to output. However, the oscillation frequency f1 of the local oscillator is set to a value sufficiently lower than the oscillation frequency f0 of the oscillation unit 10, and to allow the antenna 11 to be shared for two carriers f0 and f0 ± f1. preferable. Although the communication unit 12 includes the frequency conversion unit 126 in FIG. 6, the detection unit 13 may include the frequency conversion unit 126.

  As described above, in the moving body detection device 1 according to the present embodiment, it is preferable that one of the communication unit 12 and the detection unit 13 has the frequency conversion unit 126 that converts the frequency f0 of the carrier wave to another frequency f0 ± f1. . The communication unit 12 and the detection unit 13 are preferably configured to perform detection of a moving body or wireless communication using the carrier wave converted by the frequency conversion unit 126.

  If the moving body detection device 1 of the present embodiment is configured as described above, miniaturization and cost reduction can be achieved even when the communication unit 12 and the detection unit 13 can not share the carrier wave of the same frequency. .

DESCRIPTION OF SYMBOLS 1 moving body detection apparatus 2 illuminating device 4 brightness detection part 10 oscillation part 11 antenna 12 communication part 13 detection part 14A 1st switching part (switching part)
14B Second switching unit (switching unit)
15 control unit 20 illumination load 21 illumination control unit

Claims (8)

An oscillating unit that oscillates a carrier wave, an antenna that transmits and receives radio waves, a communication unit that performs wireless communication using the oscillating unit and the antenna, and a detecting unit that detects a moving object using the oscillating unit and the antenna A switching unit that switches between a detection state in which the detection unit detects a moving object and a communication state in which the communication unit performs wireless communication; and a control unit that controls the switching unit to alternately switch the detection state and the communication state Equipped with
Furthermore, when the detection unit detects the moving body in the detection state, the control unit causes the communication unit to transmit information related to detection of the moving body in the communication state, and the switching unit causes the detection state to be transmitted. The first time to be maintained and the second time to cause the switching unit to maintain the communication state are respectively changed, and the first time and the second time are respectively changed according to the current time. A moving body detection device characterized by   Any one of the communication unit and the detection unit has a frequency conversion unit that converts the frequency of the carrier wave to another frequency, and detects the moving body using the carrier wave converted by the frequency conversion unit, The moving object detecting apparatus according to claim 1, wherein the moving object detecting apparatus is configured to perform wireless communication. A plurality of moving body detection devices according to claim 1 or 2, and a plurality of illumination devices,
Each of the plurality of lighting devices includes a lighting load, and a lighting control unit that controls the lighting load,
The illumination control unit is electrically connected to at least one of the moving body detection devices, and the information is detected by wireless communication with another moving body detection device when the detection portion of the moving body detection device detects the moving body. Configured to control the lighting load when acquiring
An illumination system, wherein the control unit of the moving body detection device is configured to extend the second time from when the detection unit detects a moving body until a holding time elapses. Lighting system according to claim 3, wherein the Ru with a brightness detection unit for detecting the ambient brightness. The controlling portion before Symbol motion detection device, prior SL in accordance with the brightness detected by the brightness detection unit, wherein a first time, characterized in that it is constituted and the second time to change respectively The lighting system according to claim 4, wherein A plurality of moving body detection devices according to claim 1 or 2, a plurality of illumination devices, and a brightness detection unit that detects the brightness of the surroundings.
Each of the plurality of lighting devices includes a lighting load, and a lighting control unit that controls the lighting load,
The illumination control unit is electrically connected to at least one of the moving body detection devices, and the information is detected by wireless communication with another moving body detection device when the detection portion of the moving body detection device detects the moving body. Configured to control the lighting load when acquiring
The control unit of the moving body detection device is configured to change the first time and the second time according to the brightness detected by the brightness detection unit. Lighting system.   The control unit of the moving body detection device may change the information to be transmitted to the communication unit according to the frequency at which the detection unit detects the moving body or the brightness detected by the brightness detection unit. 7. A lighting system as claimed in claim 6, characterized in that it is configured. The control unit of the moving body detection device may change the information to be transmitted to the communication unit according to the frequency at which the detection unit detects the moving body or the brightness detected by the brightness detection unit. A lighting system according to claim 4 or 5, characterized in that it is configured.

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