阅读说明：本技术 一种微波警示驱动电路及灯具 (Microwave warning drive circuit and lamp ) 是由 陈毅滨 叶和木 林起锵 吴永强 刘伟 于 2020-05-19 设计创作，主要内容包括：本申请属于灯具技术领域,提供了一种微波警示驱动电路及灯具,通过过零检测电路对交流电源输出的第一直流电进行过零检测,并生成过零检测信号至控制电路,微波电路采集微波感应信号,光感电路采集环境光感应信号,控制电路基于过零检测信号、微波感应信号以及环境光感应信号生成主光源驱动信号和警示光源驱动信号,其中,主光源驱动信号的斩波时间点与过零检测信号的斩波时间点一致,从而使得主光源的熄灭时间点与过零检测信号的斩波时间点一致,避免光感电路采集的环境光感应信号受灯具自身发光的影响,解决了市场上带光感的微波感应灯没有办法屏蔽自身光,只有当自身光是熄灭的情况下,才能检测环境光的问题。(The application belongs to the technical field of lamps, and provides a microwave warning drive circuit and a lamp, wherein a first direct current output by an alternating current power supply is subjected to zero-crossing detection through a zero-crossing detection circuit, a zero-crossing detection signal is generated and sent to a control circuit, the microwave circuit collects a microwave sensing signal, a light sensing circuit collects an ambient light sensing signal, and the control circuit generates a main light source drive signal and a warning light source drive signal based on the zero-crossing detection signal, the microwave sensing signal and the ambient light sensing signal, wherein the chopping time point of the main light source drive signal is consistent with the chopping time point of the zero-crossing detection signal, so that the extinguishing time point of a main light source is consistent with the chopping time point of the zero-crossing detection signal, the ambient light sensing signal collected by the light sensing circuit is prevented from being influenced by the self-lighting of the lamp, and the problem that the microwave sensing lamp with light sensing on the market has no way to shield the self-lighting is solved, the problem of ambient light can only be detected if the light itself is extinguished.)

1. The utility model provides a microwave warning drive circuit, is connected with main light source and warning light source respectively, its characterized in that, microwave warning drive circuit includes:

the rectification filter circuit is used for accessing an alternating current power supply and converting alternating current provided by the alternating current power supply into a plurality of direct currents;

the zero-crossing detection circuit is connected with the rectifying and filtering circuit and used for carrying out zero-crossing detection on the first direct current output by the alternating current power supply and generating a zero-crossing detection signal;

the microwave circuit is used for acquiring microwave induction signals;

the light sensing circuit is used for collecting ambient light sensing signals;

the control circuit is respectively connected with the microwave circuit, the light sensing circuit and the zero-crossing detection circuit, and is used for receiving the zero-crossing detection signal, the microwave sensing signal and the ambient light sensing signal, and generating a main light source driving signal and a warning light source driving signal according to the zero-crossing detection signal, the microwave sensing signal and the ambient light sensing signal, wherein the chopping time point of the main light source driving signal is consistent with the chopping time point of the zero-crossing detection signal;

the main light source driving circuit is connected with the rectifying and filtering circuit, the control circuit and the main light source, and is used for driving the main light source to be lightened according to the main light source driving signal and second direct current output by the alternating current power supply, and chopping the second direct current according to the main light source driving signal so as to enable the extinguishing time point of the main light source to be consistent with the chopping time point of the zero-crossing detection signal;

the power supply circuit is respectively connected with the rectifying and filtering circuit, the microwave circuit, the light sensing circuit and the control circuit, and is used for receiving a third direct current output by the alternating current power supply and generating a direct current power supply signal according to the third direct current so as to supply power to the microwave circuit, the light sensing circuit and the control circuit; and

and the warning light source driving circuit is connected with the power supply circuit and the control circuit and used for receiving the warning light source driving signal and the direct current supply signal and driving the warning light source to be lightened according to the warning light source driving signal and the direct current supply signal.

2. A microwave alert driver circuit as in claim 1, wherein the microwave alert driver circuit further comprises:

and the voltage stabilizing circuit is connected with the power supply circuit and is used for performing voltage stabilizing processing on the direct current power supply signal.

3. A microwave alert driver circuit as in claim 1, wherein the rectifier filter circuit comprises: the circuit comprises a fuse, a first capacitor, a first inductor, a first resistor, a first diode, a second diode and a rectifier bridge;

the first end of the fuse is connected with a live wire of the alternating current power supply, the second end of the fuse, the first end of the first capacitor and the first input end of the rectifier bridge are connected in common, the grounding end of the rectifier bridge is grounded, the second end of the first capacitor and the second input end of the rectifier bridge are connected in common with a zero line of the alternating current power supply, the output end of the rectifier bridge, the first end of the first resistor and the first end of the first inductor are connected in common with the zero-crossing detection circuit, the second end of the first resistor, the second end of the first inductor, the anode of the first diode and the anode of the second diode are connected in common, the cathode of the first diode is connected with the main light source drive circuit, and the cathode of the second diode is connected with the power supply circuit.

4. A microwave alert driver circuit as in claim 1, wherein the primary light source driver circuit comprises: the chopper dimming circuit comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a third diode and a chopper dimming chip;

a first end of the second resistor, a first end of the second capacitor, a first end of the ninth resistor, a cathode of the third diode, a first end of the sixth capacitor, and a first end of the tenth resistor are commonly connected to the rectifying and filtering circuit and the main light source, a second end of the second resistor is connected to the first end of the third resistor, a second end of the third resistor and a first end of the third capacitor are commonly connected to a power supply terminal of the chopping dimming chip, a chip selection signal terminal of the chopping dimming chip, a first end of the seventh resistor, and a first end of the eighth resistor are commonly connected to each other, a pulse width modulation signal input terminal of the chopping dimming chip is connected to a first end of the fifth resistor, a second end of the fifth resistor and a first end of the sixth resistor are commonly connected to the control circuit, a second end of the second capacitor, a cathode of the third diode, a first end of the sixth resistor, and a first end of the tenth resistor are commonly connected to the rectifying and the main light source, a second end of the second resistor and a first end of the second resistor are commonly connected to a power supply terminal of the chopping dimming chip, and a second resistor, and a second end of the second resistor are commonly connected to the control circuit, and a second terminal of the control circuit are connected to the control circuit, and a second capacitor, and a second terminal of the control circuit are connected to the control circuit, and a second terminal of the control circuit, and a second diode are connected to the control circuit, and a second capacitor, and a second diode are connected to the control circuit, and a second terminal of the second diode are connected to the second capacitor, and a second resistor, and a second terminal of the second resistor, and a second terminal of the second resistor are connected to the second resistor, and a second terminal of the second resistor, and a second terminal of the second resistor are connected to a second resistor, and a second terminal of the second resistor, and a second resistor are connected to the second resistor, and a second terminal of the second resistor, and a second terminal of the second resistor are connected to a second resistor, and a second resistor are connected to a second resistor, and a second terminal of the second resistor, and a second terminal of the second diode are connected to a second terminal of the second resistor, and a third resistor, and a second resistor, and, A second end of the sixth resistor, a second end of the seventh resistor, a second end of the eighth resistor, a second end of the third capacitor, a second end of the fourth resistor, and a ground end of the chopping dimming chip are all connected to ground, a second end of the fourth resistor is connected to a first end of the fifth capacitor, two drain signal ends of the chopping dimming chip, a first end of the fourth capacitor, an anode of the third diode, and a first end of the second inductor are all connected to one another, a second end of the fourth capacitor is connected to a second end of the ninth resistor, and a second end of the second inductor, a second end of the sixth capacitor, a second end of the tenth resistor, and a second end of the fifth capacitor are all connected to the main light source.

5. A microwave alert driver circuit as in claim 1, wherein the power supply circuit comprises: the power supply circuit comprises a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a twenty-fourth capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a fourth diode, a fifth diode, a third inductor and a power supply chip;

a plurality of drain chip terminals of the power supply chip, a first terminal of the seventh capacitor, and a first terminal of the eighth capacitor are commonly connected to the rectifying and filtering circuit, a chip select signal terminal of the power supply chip, a first terminal of the eleventh resistor, and a first terminal of the twelfth resistor are commonly connected, a feedback signal terminal of the power supply chip, a first terminal of the thirteenth resistor, and a first terminal of the fourteenth resistor are commonly connected, a power source terminal of the power supply chip is connected to a first terminal of the ninth capacitor, a ground terminal of the power supply chip, a second terminal of the twelfth resistor, a second terminal of the eleventh resistor, a second terminal of the thirteenth resistor, a second terminal of the eleventh capacitor, a first terminal of the third inductor, a second terminal of the ninth capacitor, a first terminal of the tenth capacitor, and a cathode of the fifth diode are commonly connected, a second end of the tenth capacitor is connected to the first end of the fifteenth resistor, a second end of the fourteenth resistor, a second end of the eleventh capacitor and a cathode of the fourth diode are connected in common, a second end of the seventh capacitor, an anode of the fourth diode, a first end of the sixteenth resistor, a first end of the twenty-fourth capacitor, a first end of the twelfth capacitor and a second end of the third inductor are connected in common to form an output terminal of the power supply circuit, which is connected to the microwave circuit, the optical sensing circuit and the control circuit, and a second end of the eighth inductor, an anode of the fifth diode, a second end of the fifteenth resistor, a second end of the sixteenth resistor, a second end of the twenty-fourth capacitor and a second end of the twelfth capacitor are connected in common to ground.

6. A microwave alert driver circuit according to claim 1, wherein the microwave circuit includes: an ultrasonic sensor and a seventeenth resistor; the power supply end of the ultrasonic sensor is connected with the power supply circuit, the microwave sensing signal end of the ultrasonic sensor and the first end of the seventeenth resistor are connected to the control circuit in a shared mode, and the grounding end of the ultrasonic sensor and the second end of the seventeenth resistor are connected to the ground in a shared mode.

7. A microwave alert driver circuit as in claim 1, wherein the alert light source driver circuit comprises: the driving circuit comprises a driving chip, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a fourth inductor, a sixth diode, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor and a twenty-first capacitor;

the first end of the fourth inductor and the first end of the eighteenth capacitor are connected to the power supply circuit, the second end of the fourth inductor and the anode of the sixth diode are connected to the power switch signal end of the driving chip, the power end of the driving chip and the first end of the nineteenth capacitor, the input end of the driving chip, the second end of the eighteenth capacitor, the first end of the twentieth capacitor and the first end of the twenty-fourth resistor are connected together, the chip selection signal end of the driving chip, the first end of the eighteenth resistor and the first end of the nineteenth resistor are connected to the warning light source, the second end of the eighteenth resistor and the cathode of the sixth diode are connected, the second end of the nineteenth resistor and the first end of the twentieth resistor are connected, the grounding end of the driving chip is grounded, the overvoltage protection signal end of the driving chip is connected to the power supply circuit, The second end of the twenty-first resistor and the first end of the twenty-first resistor are connected in common, the pulse width modulation signal end of the driving chip is connected with the first end of the twenty-third resistor, the second end of the twenty-third resistor and the first end of the twenty-second resistor are connected in common to the control circuit, the signal compensation end of the driving chip is connected with the first end of the twenty-first capacitor, and the second end of the twenty-first resistor, the second end of the twenty-second resistor, the second end of the twenty-first capacitor, the second end of the nineteenth capacitor, the second end of the twentieth capacitor and the second end of the twenty-fourth capacitor are connected in common to the ground.

8. A microwave alert drive circuit as claimed in any one of claims 1 to 7, wherein the zero crossing detection circuit includes: a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a voltage regulator tube and a twenty-second capacitor;

the first end of the twenty-fifth resistor is connected with the rectifying and filtering circuit, the second end of the twenty-fifth resistor is connected with the first end of the twenty-sixth resistor, the second end of the twenty-sixth resistor, the first end of the twenty-seventh resistor, the first end of the twenty-second capacitor and the cathode of the voltage regulator tube are connected to the control circuit in a common mode, and the second end of the twenty-second capacitor, the second end of the twenty-seventh resistor and the anode of the voltage regulator tube are connected to the ground in a common mode.

9. A microwave alert driver circuit according to any of claims 1 to 7, characterised in that the light sensing circuit includes: a photodiode, a twenty-eighth resistor and a twenty-third capacitor;

the first end of the photosensitive diode is connected with the power supply circuit, the second end of the photosensitive diode, the first end of the twenty-eighth resistor and the first end of the twenty-third capacitor are connected to the control circuit in common, and the second end of the twenty-eighth resistor and the second end of the twenty-third capacitor are connected to the ground in common.

10. A light fixture, comprising: a primary light source; a warning light source; and a microwave alert driver circuit as claimed in any one of claims 1 to 9 connected to the primary and alert light sources respectively.

Technical Field

The application belongs to the technical field of lamps and lanterns, especially relates to a microwave warning drive circuit and lamps and lanterns.

Background

Microwave induction lamps have been widely used in the market due to their excellent performance. The existing microwave induction lamp emits electromagnetic waves through a planar antenna, when a moving object enters an electromagnetic wave environment, a waveform is reflected and folded back, and when the planar antenna receives a fed-back waveform, a follow-up circuit works through detecting a trigger signal so as to control the induction lamp to be lightened.

At present, microwave induction lamps with light sensation in the market have no way of shielding self light, and only under the condition that the self light is extinguished, the environment light can be detected. For example: when a person comes and goes in a dark environment, the lamp is on, and if the environment suddenly turns on, the lamp is still on and cannot be turned off.

Disclosure of Invention

The application aims to provide a microwave warning driving circuit and a lamp, and aims to solve the problem that a microwave induction lamp with light sensation in the market cannot shield self light, and can detect ambient light only when the self light is extinguished.

The first aspect of the embodiment of the present application provides a microwave warning drive circuit, is connected with main light source and warning light source respectively, microwave warning drive circuit includes:

the rectification filter circuit is used for accessing an alternating current power supply and converting alternating current provided by the alternating current power supply into a plurality of direct currents;

the zero-crossing detection circuit is connected with the rectifying and filtering circuit and used for carrying out zero-crossing detection on the first direct current output by the alternating current power supply and generating a zero-crossing detection signal;

the microwave circuit is used for acquiring microwave induction signals;

the light sensing circuit is used for collecting ambient light sensing signals;

the control circuit is respectively connected with the microwave circuit, the light sensing circuit and the zero-crossing detection circuit, and is used for receiving the zero-crossing detection signal, the microwave sensing signal and the ambient light sensing signal, and generating a main light source driving signal and a warning light source driving signal according to the zero-crossing detection signal, the microwave sensing signal and the ambient light sensing signal, wherein the chopping time point of the main light source driving signal is consistent with the chopping time point of the zero-crossing detection signal;

the main light source driving circuit is connected with the rectifying and filtering circuit, the control circuit and the main light source, and is used for driving the main light source to be lightened according to the main light source driving signal and second direct current output by the alternating current power supply, and chopping the second direct current according to the main light source driving signal so as to enable the extinguishing time point of the main light source to be consistent with the chopping time point of the zero-crossing detection signal;

the power supply circuit is respectively connected with the rectifying and filtering circuit, the microwave circuit, the light sensing circuit and the control circuit, and is used for receiving a third direct current output by the alternating current power supply and generating a direct current power supply signal according to the third direct current so as to supply power to the microwave circuit, the light sensing circuit and the control circuit; and

and the warning light source driving circuit is connected with the power supply circuit and the control circuit and used for receiving the warning light source driving signal and the direct current supply signal and driving the warning light source to be lightened according to the warning light source driving signal and the direct current supply signal.

Optionally, the microwave warning driving circuit further includes:

and the voltage stabilizing circuit is connected with the power supply circuit and is used for performing voltage stabilizing processing on the direct current power supply signal.

Optionally, the rectification filter circuit includes: the circuit comprises a fuse, a first capacitor, a first inductor, a first resistor, a first diode, a second diode and a rectifier bridge;

the first end of the fuse is connected with a live wire of the alternating current power supply, the second end of the fuse, the first end of the first capacitor and the first input end of the rectifier bridge are connected in common, the grounding end of the rectifier bridge is grounded, the second end of the first capacitor and the second input end of the rectifier bridge are connected in common with a zero line of the alternating current power supply, the output end of the rectifier bridge, the first end of the first resistor and the first end of the first inductor are connected in common with the zero-crossing detection circuit, the second end of the first resistor, the second end of the first inductor, the anode of the first diode and the anode of the second diode are connected in common, the cathode of the first diode is connected with the main light source drive circuit, and the cathode of the second diode is connected with the power supply circuit.

Optionally, the main light source driving circuit includes: the chopper dimming circuit comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a third diode and a chopper dimming chip;

a first end of the second resistor, a first end of the second capacitor, a first end of the ninth resistor, a cathode of the third diode, a first end of the sixth capacitor, and a first end of the tenth resistor are commonly connected to the rectifying and filtering circuit and the main light source, a second end of the second resistor is connected to the first end of the third resistor, a second end of the third resistor and a first end of the third capacitor are commonly connected to a power supply terminal of the chopping dimming chip, a chip selection signal terminal of the chopping dimming chip, a first end of the seventh resistor, and a first end of the eighth resistor are commonly connected to each other, a pulse width modulation signal input terminal of the chopping dimming chip is connected to a first end of the fifth resistor, a second end of the fifth resistor and a first end of the sixth resistor are commonly connected to the control circuit, a second end of the second capacitor, a cathode of the third diode, a first end of the sixth resistor, and a first end of the tenth resistor are commonly connected to the rectifying and the main light source, a second end of the second resistor and a first end of the second resistor are commonly connected to a power supply terminal of the chopping dimming chip, and a second resistor, and a second end of the second resistor are commonly connected to the control circuit, and a second terminal of the control circuit are connected to the control circuit, and a second capacitor, and a second terminal of the control circuit are connected to the control circuit, and a second terminal of the control circuit, and a second diode are connected to the control circuit, and a second capacitor, and a second diode are connected to the control circuit, and a second terminal of the second diode are connected to the second capacitor, and a second resistor, and a second terminal of the second resistor, and a second terminal of the second resistor are connected to the second resistor, and a second terminal of the second resistor, and a second terminal of the second resistor are connected to a second resistor, and a second terminal of the second resistor, and a second resistor are connected to the second resistor, and a second terminal of the second resistor, and a second terminal of the second resistor are connected to a second resistor, and a second resistor are connected to a second resistor, and a second terminal of the second resistor, and a second terminal of the second diode are connected to a second terminal of the second resistor, and a third resistor, and a second resistor, and, A second end of the sixth resistor, a second end of the seventh resistor, a second end of the eighth resistor, a second end of the third capacitor, a second end of the fourth resistor, and a ground end of the chopping dimming chip are all connected to ground, a second end of the fourth resistor is connected to a first end of the fifth capacitor, two drain signal ends of the chopping dimming chip, a first end of the fourth capacitor, an anode of the third diode, and a first end of the second inductor are all connected to one another, a second end of the fourth capacitor is connected to a second end of the ninth resistor, and a second end of the second inductor, a second end of the sixth capacitor, a second end of the tenth resistor, and a second end of the fifth capacitor are all connected to the main light source.

Optionally, the power supply circuit includes: the power supply circuit comprises a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a twenty-fourth capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a fourth diode, a fifth diode, a third inductor and a power supply chip;

a plurality of drain chip terminals of the power supply chip, a first terminal of the seventh capacitor, and a first terminal of the eighth capacitor are commonly connected to the rectifying and filtering circuit, a chip select signal terminal of the power supply chip, a first terminal of the eleventh resistor, and a first terminal of the twelfth resistor are commonly connected, a feedback signal terminal of the power supply chip, a first terminal of the thirteenth resistor, and a first terminal of the fourteenth resistor are commonly connected, a power source terminal of the power supply chip is connected to a first terminal of the ninth capacitor, a ground terminal of the power supply chip, a second terminal of the twelfth resistor, a second terminal of the eleventh resistor, a second terminal of the thirteenth resistor, a second terminal of the eleventh capacitor, a first terminal of the third inductor, a second terminal of the ninth capacitor, a first terminal of the tenth capacitor, and a cathode of the fifth diode are commonly connected, a second end of the tenth capacitor is connected to the first end of the fifteenth resistor, a second end of the fourteenth resistor, a second end of the eleventh capacitor and a cathode of the fourth diode are connected in common, a second end of the seventh capacitor, an anode of the fourth diode, a first end of the sixteenth resistor, a first end of the twenty-fourth capacitor, a first end of the twelfth capacitor and a second end of the third inductor are connected in common to form an output terminal of the power supply circuit, which is connected to the microwave circuit, the optical sensing circuit and the control circuit, and a second end of the eighth inductor, an anode of the fifth diode, a second end of the fifteenth resistor, a second end of the sixteenth resistor, a second end of the twenty-fourth capacitor and a second end of the twelfth capacitor are connected in common to ground.

Optionally, the microwave circuit includes: an ultrasonic sensor and a seventeenth resistor; the power supply end of the ultrasonic sensor is connected with the power supply circuit, the microwave sensing signal end of the ultrasonic sensor and the first end of the seventeenth resistor are connected to the control circuit in a shared mode, and the grounding end of the ultrasonic sensor and the second end of the seventeenth resistor are connected to the ground in a shared mode.

Optionally, the warning light source driving circuit includes: the driving circuit comprises a driving chip, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a fourth inductor, a sixth diode, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor and a twenty-first capacitor;

the first end of the fourth inductor and the first end of the eighteenth capacitor are connected to the power supply circuit, the second end of the fourth inductor and the anode of the sixth diode are connected to the power switch signal end of the driving chip, the power end of the driving chip and the first end of the nineteenth capacitor, the input end of the driving chip, the second end of the eighteenth capacitor, the first end of the twentieth capacitor and the first end of the twenty-fourth resistor are connected together, the chip selection signal end of the driving chip, the first end of the eighteenth resistor and the first end of the nineteenth resistor are connected to the warning light source, the second end of the eighteenth resistor and the cathode of the sixth diode are connected, the second end of the nineteenth resistor and the first end of the twentieth resistor are connected, the grounding end of the driving chip is grounded, the overvoltage protection signal end of the driving chip is connected to the power supply circuit, The second end of the twenty-first resistor and the first end of the twenty-first resistor are connected in common, the pulse width modulation signal end of the driving chip is connected with the first end of the twenty-third resistor, the second end of the twenty-third resistor and the first end of the twenty-second resistor are connected in common to the control circuit, the signal compensation end of the driving chip is connected with the first end of the twenty-first capacitor, and the second end of the twenty-first resistor, the second end of the twenty-second resistor, the second end of the twenty-first capacitor, the second end of the nineteenth capacitor, the second end of the twentieth capacitor and the second end of the twenty-fourth capacitor are connected in common to the ground.

Optionally, the zero-crossing detection circuit includes: a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a voltage regulator tube and a twenty-second capacitor;

the first end of the twenty-fifth resistor is connected with the rectifying and filtering circuit, the second end of the twenty-fifth resistor is connected with the first end of the twenty-sixth resistor, the second end of the twenty-sixth resistor, the first end of the twenty-seventh resistor, the first end of the twenty-second capacitor and the cathode of the voltage regulator tube are connected to the control circuit in a common mode, and the second end of the twenty-second capacitor, the second end of the twenty-seventh resistor and the anode of the voltage regulator tube are connected to the ground in a common mode.

Optionally, the light sensing circuit includes: a photodiode, a twenty-eighth resistor and a twenty-third capacitor;

the first end of the photosensitive diode is connected with the power supply circuit, the second end of the photosensitive diode, the first end of the twenty-eighth resistor and the first end of the twenty-third capacitor are connected to the control circuit in common, and the second end of the twenty-eighth resistor and the second end of the twenty-third capacitor are connected to the ground in common.

The second aspect of the present application further provides a luminaire, including: a primary light source; a warning light source; and the microwave warning drive circuit is respectively connected with the main light source and the warning light source.

The embodiment of the application provides a microwave warning drive circuit and a lamp, wherein a zero-crossing detection circuit is used for carrying out zero-crossing detection on a first direct current output by an alternating current power supply and generating a zero-crossing detection signal to a control circuit, the microwave circuit is used for collecting a microwave induction signal, a light sensing circuit is used for collecting an ambient light induction signal, and the control circuit is used for generating a main light source drive signal and a warning light source drive signal based on the zero-crossing detection signal, the microwave induction signal and the ambient light induction signal, wherein the chopping time point of the main light source drive signal is consistent with the chopping time point of the zero-crossing detection signal, so that the extinguishing time point of the main light source is consistent with the chopping time point of the zero-crossing detection signal, the ambient light induction signal collected by the light sensing circuit is prevented from being influenced by the self-lighting of the lamp, the problem that the microwave induction lamp with light sensing on the market has no way to shield the self light is solved, and only under the condition that the self light is extinguished, can the problem of ambient light be detected.

Drawings

Fig. 1 is a schematic structural diagram of a microwave warning driving circuit according to an embodiment of the present disclosure;

fig. 2 is a schematic application diagram of another microwave warning driving circuit according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another microwave warning driving circuit according to an embodiment of the present disclosure.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The embodiment of the present application provides a microwave warning light source driving circuit 28, as shown in fig. 1, the microwave warning light source driving circuit 28 in this embodiment is respectively connected to a main light source 11 and a warning light source 12, and the microwave warning light source driving circuit 28 includes: the circuit comprises a rectifying and filtering circuit 21, a zero-crossing detection circuit 22, a microwave circuit 23, a light sensing circuit 24, a control circuit 25, a main light source driving circuit 26, a power supply circuit 27 and a warning light source driving circuit 28. Specifically, the rectifying and filtering circuit 21 is used for accessing an ac power supply 10 and converting ac power provided by the ac power supply 10 into a plurality of dc power; the zero-crossing detection circuit 22 is connected to the rectifying and filtering circuit 21, and is configured to perform zero-crossing detection on the first direct current output by the alternating current power supply 10 and generate a zero-crossing detection signal; the microwave circuit 23 is used for collecting microwave induction signals; the light sensing circuit 24 is used for collecting ambient light sensing signals; the control circuit 25 is respectively connected to the microwave circuit 23, the light sensing circuit 24 and the zero-crossing detection circuit 22, and is configured to receive the zero-crossing detection signal, the microwave sensing signal and the ambient light sensing signal, and generate a main light source 11 driving signal and a warning light source 12 driving signal according to the zero-crossing detection signal, the microwave sensing signal and the ambient light sensing signal, where a chopping time point of the main light source 11 driving signal is consistent with a chopping time point of the zero-crossing detection signal; the main light source driving circuit 26 is connected to the rectifying and filtering circuit 21, the control circuit 25 and the main light source 11, and is configured to drive the main light source 11 to light according to the main light source 11 driving signal and a second direct current output by the alternating current power supply 10, and perform chopping processing on the second direct current according to the main light source 11 driving signal, so that an extinguishing time point of the main light source 11 is consistent with a chopping time point of the zero-crossing detection signal; the power supply circuit 27 is respectively connected to the rectifying and filtering circuit 21, the microwave circuit 23, the light sensing circuit 24 and the control circuit 25, and is configured to receive a third direct current output by the ac power supply 10 and generate a direct current power supply signal according to the third direct current, so as to supply power to the microwave circuit 23, the light sensing circuit 24 and the control circuit 25; and the warning light source driving circuit 28 is connected with the power supply circuit 27 and the control circuit 25, and is configured to receive the warning light source 12 driving signal and the dc power supply signal, and drive the warning light source 12 to be turned on according to the warning light source 12 driving signal and the dc power supply signal.

In this embodiment, the rectifying and filtering circuit 21 converts the ac power provided by the ac power supply 10 into a dc voltage waveform without a negative half cycle, and performs zero-crossing detection on the first dc power output by the rectifying and filtering circuit 21 through the zero-crossing detection circuit 22 to generate the zero-crossing detection signal TS1, and the chopping time point of the main light source 11 driving signal output by the control circuit 25 is consistent with the chopping time point of the zero-crossing detection signal TS1, that is, when the zero-crossing detection signal TS1 is 0V, the main light source 11 driving signal chops the output current of the main light source driving circuit 26, so that it can be ensured that the chopping point of the main light source driving circuit 26 is consistent in each cycle, that is, the output current waveform of each cycle is consistent, and therefore, the main light source 11 is prevented from flashing.

Further, in one embodiment, the control circuit 25 further generates the main light source 11 driving signal PWM1 and the warning light source 12 driving signal PWM2 to drive and light the main light source 11 and the warning light source 12, respectively, based on the microwave sensing signal TS2 and the ambient light sensing signal TS 3. For example, when a person passes by, the microwave sensing signal TS2 collected by the microwave circuit 23 is at a high level, when no person walks by, the microwave sensing signal TS2 collected by the microwave circuit 23 is at a low level, when the environment is bright, the voltage of the ambient light sensing signal TS3 output by the light sensing circuit 24 is greater than 3V, and when the environment is dark, the voltage of the ambient light sensing signal TS3 is less than 0.7V.

In a specific application scenario, when the TS2 outputs a high level and the TS3 is greater than 3V, that is, a person walks in a bright environment, the PWM1 outputs a low level, and the PWM2 outputs a high level, the main light source 11 and the warning light source 12 are turned on; when the TS2 outputs a high level and the TS3 is less than 0.7V, namely people walk in a dark environment, the PWM1 outputs a low level, the PWM2 outputs a high level, the main light source 11 is turned off, and the warning light source 12 is turned on; when the TS2 outputs low level and TS3 is larger than 3V, namely no person walks in a bright environment, the PWM1 outputs low level, the PWM2 outputs low level, the main light source 11 is turned off, and the warning light source 12 is also turned off; when the TS2 outputs a low level, and TS3 is less than 0.7V, namely no person walks in a dark environment, the PWM1 outputs a level according to the same chopping time point as the zero-crossing detection signal TS1, and meanwhile, the PWM2 outputs a low level, at the moment, the main lamp is turned on, and the warning lamp is turned off.

In one embodiment, the light sensing circuit 24 may collect the ambient light sensing signal TS3 only after the main light source 11 is turned off, for example, the driving signal of the main light source 11 output by the control circuit 25 is at a low level (the time for maintaining the low level is T), the start time of the low level is consistent with the time point when the zero-crossing detection signal TS1 is 0V, at this time, the main light source 11 is turned off, and the light sensing circuit 24 detects the ambient light, so as to avoid detecting the light of the lamp itself and only detect the ambient light.

Further, in an embodiment, the time point when the light sensing circuit 24 detects the ambient light may be a time T1 after the driving signal PWM1 of the main light source 11 is at a low level, where T1+ T2 ═ T, that is, the control circuit 25 outputs the low level of the time T, and after the main light is turned off, the control circuit 25 collects the ambient light sensing signal TS3 within a time T1 instead of collecting the ambient light sensing signal TS3 within a time T2, so as to avoid an influence of an output capacitor existing in the main light source driving circuit 26 on the voltage of the main light source 11. For example, when the driving signal of the main light source 11 output by the control circuit 25 is at a low level of 2ms, the detection is started after the main light source 11 is turned off, specifically, the detection time period may be 1.7-1.9ms, and the detection is not performed during the period of 0-1.7ms, the output capacitor in the main light source driving circuit 26 usually adopts a small-capacity thin-film capacitor, and when the control circuit 25 outputs a low level of 2ms (i.e., the driving signal PWM1 of the main light source 11), although the output current is not immediately reduced to 0mA, the current can be ensured to be reduced to 0mA within 1.7ms, and the detection is performed during the period of 1.7-1.9ms, so that the detection of the self light can be avoided, and only the ambient light can be detected. The above detection time may be other times, and this time is only for explanation.

In one embodiment, when TS2 outputs a low level, and TS3 < 0.7V, i.e., no one is walking in a dark environment, the main light source 11 driving signal PWM1 output by the control circuit 25 outputs a level at the same chopping time point as the zero-crossing detection signal TS1, and the ambient light detection process in the above embodiment is repeated, and at the same time, PWM2 outputs a low level, at which the main light (main light source 11) is turned on and the warning light (warning light source 12) is turned off.

In one embodiment, referring to fig. 2, the microwave warning light source driving circuit 28 further includes a voltage stabilizing circuit 29, and the voltage stabilizing circuit 29 is connected to the power supply circuit 27 for performing voltage stabilization processing on the dc power supply signal.

In the present embodiment, the voltage stabilizing circuit 29 stabilizes the dc power supply signal output from the power supply circuit 27, thereby avoiding detection errors caused by unstable power supply to the microwave circuit 23, the light sensing circuit 24, and the control circuit 25.

In one embodiment, referring to fig. 3, the rectifying and filtering circuit 21 includes: a fuse FR1, a first capacitor C1, a first inductor L1, a first resistor R1, a first diode D1, a second diode D2, and a rectifier bridge BD; a first terminal of the fuse FR1 is connected to the hot line of the ac power source 10, a second terminal of the fuse FR1, a first terminal of the first capacitor C1 and a first input terminal of the rectifier bridge BD are connected in common, the grounding end of the rectifier bridge BD is grounded, the second end of the first capacitor C1 and the second input end of the rectifier bridge BD are connected to the zero line of the alternating current power supply 10, the output end of the rectifier bridge, the first end of the first resistor R1 and the first end of the first inductor L1 are connected to the zero-crossing detection circuit 22, the second terminal of the first resistor R1, the second terminal of the first inductor L1, the anode of the first diode D1 and the anode of the second diode D2 are connected in common, the cathode of the first diode D1 is connected to the main light source driving circuit 26, and the cathode of the second diode D2 is connected to the power supply circuit 27.

In one embodiment, the fuse FR1 is used for detecting the overcurrent of the ac power output by the ac power supply 10 to avoid circuit damage caused by the overcurrent of the ac power, and the rectifier bridge BD is used for rectifying the ac power, for example, converting the ac sine wave provided by the ac power supply 10 at 50/60HZ into a dc waveform of 100/120HZ without negative half cycles.

In one embodiment, referring to fig. 3, the rectifier bridge BD includes a seventh diode D7, an eighth diode D8, a ninth diode D9, and a twelfth diode D10; an anode of the seventh diode D7 and an anode of the ninth diode D9 are connected to the ground in common, a cathode of the seventh diode D7 and an anode of the eighth diode D8 are connected to the fuse FR1 in common, a cathode of the ninth diode D9 and an anode of the twelfth diode D10 are connected to the zero line N of the ac power supply 10 in common, and a cathode of the twelfth diode D10 and a cathode of the eighth diode D8 are connected to the rectifying and smoothing circuit 21 in common.

In one embodiment, referring to fig. 3, the main light source driving circuit 26 includes: a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a third diode D3 and a chopping dimming chip U1; a first end of the second resistor R2, a first end of the second capacitor C2, a first end of the ninth resistor R9, a cathode of the third diode D3, a first end of the sixth capacitor C6 and a first end of the tenth resistor R10 are commonly connected to the rectifying and filtering circuit 21 and the primary light source 11, a second end of the second resistor R2 is connected to a first end of the third resistor R3, a second end of the third resistor R3 and a first end of the third capacitor C3 are commonly connected to the power supply terminal VDD of the chopping dimming chip U1, a chip select signal terminal CS of the chopping dimming chip U1, a first end of the seventh resistor R7 and a first end of the eighth resistor R8 are commonly connected, a pulse width modulation signal input terminal DIM of the chopping dimming chip U1 is connected to a first end of the fifth resistor R5, a second end of the fifth resistor R5 and a first end of the sixth resistor R6 are commonly connected to the control circuit, the second end of the second capacitor C2, the second end of the sixth resistor R6, the second end of the seventh resistor R7, the second end of the eighth resistor R8, the second end of the third capacitor C3, the second end of the fourth resistor R4, and the ground end GND of the dimming chopping chip U1 are connected to ground in common, a second end of the fourth resistor R4 is connected to a first end of the fifth capacitor C5, two DRAIN signal ends DRAIN of the chopping dimming chip U1, a first end of the fourth capacitor C4, an anode of the third diode D3, and a first end of the second inductor are connected in common, a second terminal of the fourth capacitor C4 is connected to a second terminal of the ninth resistor R9, and a second terminal of the second inductor, a second terminal of the sixth capacitor C6, a second terminal of the tenth resistor R10, and a second terminal of the fifth capacitor C5 are connected to the primary light source 11.

In this embodiment, the chopping dimming chip U1 chops the output current of the main light source 11 based on the driving signal, and by chopping when the control circuit 25 detects that the zero-crossing detection signal TS1 is 0V, it can be ensured that the chopping point of the output current is consistent in each detection period, that is, the output current waveform in each period is consistent, thereby avoiding the occurrence of a flash phenomenon in the main light source 11.

In one embodiment, referring to FIG. 3, the primary light source 11 may be a first light emitting diode LED 1.

In one embodiment, referring to fig. 3, the power supply circuit 27 includes: a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a twenty-fourth capacitor C24, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a fourth diode D4, a fifth diode D5, a third inductor L3, and a power supply chip U2; a plurality of drain chip terminals DR of the power supply chip U2, a first terminal of the seventh capacitor C7, and a first terminal of the eighth capacitor C8 are commonly connected to the rectifying and filtering circuit 21, a chip select signal terminal CS of the power supply chip U2, a first terminal of the eleventh resistor R11, and a first terminal of the twelfth resistor R12 are commonly connected, a feedback signal terminal FB of the power supply chip U2, a first terminal of the thirteenth resistor R13, and a first terminal of the fourteenth resistor R14 are commonly connected, a power terminal VDD of the power supply chip U2 is connected to the first terminal of the ninth capacitor C9, a ground terminal GND of the power supply chip U2, a second terminal of the twelfth resistor R12, a second terminal of the eleventh resistor R11, a second terminal of the thirteenth resistor R13, a second terminal of the eleventh capacitor C11, a first terminal of the third inductor L3, and a first terminal of the ninth capacitor C9, A first end of the tenth capacitor C10 and a cathode of the fifth diode D5 are commonly connected, a second end of the tenth capacitor C10 is connected to a first end of the fifteenth resistor R15, a second end of the fourteenth resistor R14, a second end of the eleventh capacitor C11 and a cathode of the fourth diode D4 are commonly connected, a second end of the seventh capacitor C7, an anode of the fourth diode D4, a first end of the sixteenth resistor R16, a first end of the twenty-fourth capacitor C24, a first end of the twelfth capacitor C12 and a second end of the third inductor L3 are commonly connected to form an output end of the power supply circuit 27, which is connected to the microwave circuit 23, the optical sensing circuit 24 and the control circuit 25, a second end of the eighth inductor, an anode of the fifth diode D5, a second end of the fifteenth resistor R15 and a second end of the sixteenth resistor R16, A second terminal of the twenty-fourth capacitor C24 and a second terminal of the twelfth capacitor C12 are commonly connected to ground.

In the present embodiment, the power supply chip U2 and its peripheral circuit perform voltage conversion on the second dc power output by the rectifying and filtering circuit 21 to supply power to the rear-end microwave circuit 23, the photosensitive circuit 24 and the control circuit 25.

In one embodiment, referring to fig. 3, the microwave circuit 23 comprises: an ultrasonic sensor CON1, a seventeenth resistor R17; the power supply terminal VCC of the ultrasonic sensor CON1 is connected to the power supply circuit 27, the microwave sensing signal terminal PWM of the ultrasonic sensor CON1 and the first terminal of the seventeenth resistor R17 are connected to the control circuit 25, and the ground terminal GND of the ultrasonic sensor CON1 and the second terminal of the seventeenth resistor R17 are connected to ground.

In this embodiment, whether a moving object passes through is collected by the ultrasonic sensor CON1, so that a microwave induction signal is generated.

In one embodiment, referring to fig. 3, the warning light source driving circuit 28 includes: the driving circuit comprises a driving chip U4, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a fourth inductor L4, a sixth diode D6, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20 and a twenty-first capacitor C21; a first end of the fourth inductor L4 and a first end of the eighteenth capacitor C18 are commonly connected to the power supply circuit 27, a second end of the fourth inductor L4 and an anode of the sixth diode D6 are commonly connected to the power switch signal end SW of the driving chip U4, a power source end VDD of the driving chip U4 and a first end of the nineteenth capacitor C19 are commonly connected, an input end VIN of the driving chip U4, a second end of the eighteenth capacitor C18, a first end of the twentieth capacitor C20 and a first end of the twenty-fourth resistor R24 are commonly connected, a chip select signal end CS of the driving chip U4, a first end of the eighteenth resistor R18 and a first end of the nineteenth resistor R19 are commonly connected to the warning light source 12, a second end of the eighteenth resistor R18 is connected to a cathode of the sixth diode D6, a second end of the nineteenth resistor R19 and a first end of the twentieth resistor R20 are connected to the first end of the twenty-first diode D6, a ground terminal GND of the driving chip U4 is grounded, an overvoltage protection signal terminal OVP of the driving chip U4, a second terminal of the twentieth resistor R20 and a first terminal of the twenty-first resistor R21 are connected in common, a pulse width modulation signal terminal ADI of the driving chip U4 is connected to a first terminal of the twenty-third resistor R23, a second terminal of the twenty-third resistor R23 and a first terminal of the twenty-second resistor R22 are connected to the control circuit 25 in common, a signal compensation terminal COMP of the driving chip U4 is connected to a first terminal of the twenty-first capacitor C21, and a second terminal of the twenty-first resistor R21, a second terminal of the twenty-second resistor R22, a second terminal of the twenty-first capacitor C21, a second terminal of the nineteenth capacitor C19, a second terminal of the twenty-second capacitor C20 and a second terminal of the twenty-fourth capacitor C24 are connected to ground in common.

In the present embodiment, the warning light source driving circuit 28 adjusts the warning light source 12 based on the warning light source 12 driving signal PWM2 provided by the control circuit 25. Specifically, the warning light source 12 is driven to light by the warning light source driving circuit 28, and when it is detected that the microwave sensing signal TS2 is at a high level, a person walks around, and the control circuit 25 outputs a corresponding warning light source 12 driving signal to drive the warning light source 12 to light.

In one embodiment, referring to FIG. 3, the warning light source 12 may be a second light emitting diode LED 2.

In one embodiment, referring to fig. 3, the zero crossing detection circuit 22 includes: a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a voltage regulator tube ZD and a twenty-second capacitor C22; a first end of the twenty-fifth resistor R25 is connected to the rectifying and filtering circuit 21, a second end of the twenty-fifth resistor R25 is connected to a first end of the twenty-sixth resistor R26, a second end of the twenty-sixth resistor R26, a first end of the twenty-seventh resistor R27, a first end of the twenty-second capacitor C22, and a cathode of the regulator tube ZD are connected to the control circuit 25 in common, and a second end of the twenty-second capacitor C22, a second end of the twenty-seventh resistor R27, and an anode of the regulator tube ZD are connected to ground in common.

In the first embodiment, the twenty-fifth resistor R25, the twenty-sixth resistor R26, the twenty-seventh resistor R27, and the voltage regulator ZD form a voltage divider circuit, so that zero-crossing detection is performed on the first direct current output by the rectifier filter circuit 21, and it is ensured that the current waveforms in each period are kept consistent.

In one embodiment, referring to fig. 3, the light sensing circuit 24 includes: a photodiode CDS1, a twenty-eighth resistor R28, and a twenty-third capacitor C23; a first terminal of the photodiode CDS1 is connected to the power supply circuit 27, a second terminal of the photodiode CDS1, a first terminal of the twenty-eighth resistor R28, and a first terminal of the twenty-third capacitor C23 are connected to the control circuit 25 in common, and a second terminal of the twenty-eighth resistor R28 and a second terminal of the twenty-third capacitor C23 are connected to ground in common.

In one embodiment, referring to fig. 3, the voltage regulation circuit 29 includes a voltage regulation chip U3, a thirteenth capacitor C13, and a fourteenth capacitor C14; the input end of the voltage stabilizing chip U3 is connected to the power supply circuit 27, the output end of the voltage stabilizing chip U3, the first end of the thirteenth capacitor C13 and the first end of the fourteenth capacitor C14 are commonly connected to the microwave circuit 23, and the ground end of the voltage stabilizing chip U3, the second end of the thirteenth capacitor C13 and the second end of the fourteenth capacitor C14 are grounded.

In one embodiment, referring to fig. 3, the control circuit 25 is composed of a control chip U5, the zero crossing detection signal terminal TS1 of the control chip U5 is connected to the zero crossing detection circuit 22, is used for receiving the zero-crossing detection signal TS1 output by the zero-crossing detection circuit 22, the microwave induction signal end TS2 of the control chip U5 is connected with the microwave circuit 23, is used for receiving a microwave sensing signal TS2 output by the microwave circuit 23, an ambient light sensing signal terminal TS3 of the control chip U5 is connected with the light sensing circuit 24, used for receiving the ambient light sensing signal TS3 output by the light sensing circuit 24, the main light source 11 driving signal end PWM1 of the control chip U5 is connected to the main light source driving circuit 26, is used for providing a main light source 11 driving signal PWM2 for the main light source driving circuit 26, a warning light source 12 driving signal end PWM2 of the control chip U5 is connected with the warning light source 12 driving circuit, for providing a warning light source 12 driving signal PWM2 to the warning light source 12 driving circuit.

Specifically, the control chip U5 may be a logic control circuit 25, and the logic control circuit 25 may be composed of basic logic circuits such as an and gate, an or gate, a not gate, and the like, so as to generate corresponding driving signals of the main light source 11 and the warning light source 12 based on the zero-crossing detection signal, the microwave sensing signal, and the ambient light sensing signal. For example, when TS2 is at a high level and TS3 > 3V, that is, a person moves in a bright environment, PWM1 is at a low level and PWM2 is at a high level, and the main light source 11 and the warning light source 12 are turned on; when the TS2 is at a high level and the TS3 is less than 0.7V, that is, a person walks in a dark environment, the PWM1 is at a low level and the PWM2 is at a high level, the main light source 11 is turned off, and the warning light source 12 is turned on; when the TS2 is at a low level and TS3 is greater than 3V, that is, no person walks in a bright environment, the PWM1 is at a low level and the PWM2 is at a low level, at this time, the main light source 11 is turned off, and the warning light source 12 is also turned off; when the TS2 is at a low level and the TS3 is less than 0.7V, that is, no person walks in a dark environment, the PWM1 outputs a level at the same chopping time point as the zero-crossing detection signal TS1, the light sensing circuit 24 continues to collect the ambient light sensing signal TS3, and the PWM2 outputs a low level, at this time, the main lamp is turned on, and the warning lamp is turned off.

The second aspect of the present application further provides a luminaire, including: a main light source 11; a warning light source 12; and the microwave warning light source driving circuit 28 according to any one of the above embodiments, wherein the microwave warning light source driving circuit 28 is respectively connected to the main light source 11 and the warning light source 12.

The embodiment of the application provides a microwave warning drive circuit and a lamp, wherein a zero-crossing detection circuit is used for carrying out zero-crossing detection on a first direct current output by an alternating current power supply and generating a zero-crossing detection signal to a control circuit, the microwave circuit is used for collecting a microwave induction signal, a light sensing circuit is used for collecting an ambient light induction signal, and the control circuit is used for generating a main light source drive signal and a warning light source drive signal based on the zero-crossing detection signal, the microwave induction signal and the ambient light induction signal, wherein the chopping time point of the main light source drive signal is consistent with the chopping time point of the zero-crossing detection signal, so that the extinguishing time point of the main light source is consistent with the chopping time point of the zero-crossing detection signal, the ambient light induction signal collected by the light sensing circuit is prevented from being influenced by the self-lighting of the lamp, the problem that the microwave induction lamp with light sensing on the market has no way to shield the self light is solved, and only under the condition that the self light is extinguished, can the problem of ambient light be detected.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.