Microwave dimming circuit, PCB and controller thereof

Abstract

The utility model discloses a microwave dimming circuit, a PCB and a controller thereof, comprising a power supply unit, a main control unit, a microwave induction unit and a dimming output unit, the input end of the power supply unit is respectively connected with a zero line end and a live line end, and the output end of the power supply unit is respectively connected with the main control unit, the microwave induction unit and the dimming output unit. The main control unit is respectively connected with the microwave induction unit and the dimming output unit; the main control unit is used for controlling an output signal of the dimming output unit according to an induction signal of the microwave induction unit; when the microwave induction unit detects a human body microwave signal, a starting signal is fed back to the main control unit, the main control unit sends a modulation signal to the dimming output unit according to an external dimming signal, and the dimming output unit adjusts a chopping signal by controlling the on-off time of the dimming output unit, so that the control and adjustment of the light brightness are realized; by means of the mode, the circuit can achieve the microwave induction function and the dimming function at the same time, and the use experience feeling of a user is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control switches, and particularly relates to a microwave dimming circuit, a PCB board and a controller thereof. Background Art

[0002] When the existing microwave induction switch controls a lamp, it only has the functions of turning on and off the lamp, and cannot adjust the brightness level of the lamp, which greatly affects the user experience.

[0003] Obviously, the existing technology still needs to be improved. Summary of the Utility Model

[0004] In view of the deficiencies of the above-mentioned existing technology, the purpose of the utility model is to provide a microwave dimming circuit, which can simultaneously realize the functions of microwave induction and dimming, and effectively improve the user experience.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A microwave dimming circuit includes a power supply unit, a main control unit, a microwave induction unit and a dimming output unit. The input end of the power supply unit is respectively connected to the neutral wire end and the live wire end, and the output end of the power supply unit is respectively connected to the main control unit, the microwave induction unit and the dimming output unit. The main control unit is respectively connected to the microwave induction unit and the dimming output unit; the main control unit is used to control the output signal of the dimming output unit according to the induction signal of the microwave induction unit.

[0007] In the microwave dimming circuit, the main control unit includes a first control chip U1 and a DIP switch K1. The pin 4 of the first control chip U1 is connected to the power supply unit, and the pins 1 to 6 of the DIP switch K1 are sequentially connected to the pins 1, 2, 3, 9, 10 and 6 of the first control chip U1; the microwave induction unit is connected to the pin 7 of the first control chip U1, and the dimming output unit is connected to the pin 8 of the first control chip U1.

[0008] In the microwave dimming circuit, the microwave induction unit includes a second control chip U2. The pin 1 of the second control chip U2 is connected to the pin 7 of the first control chip U1, the pin 2 of the second control chip U2 is grounded, and the pin 3 of the second control chip U2 is connected to the power supply unit.

[0009] In the described microwave dimming circuit, the dimming output unit includes a third control chip U3 and a triac Q1. Pin 1 of the third control chip U3 is connected to pin 8 of the first control chip U1. The input end of the triac Q1 is connected to the power supply unit. The control end of the triac Q1 is connected to pin 4 of the third control chip U3. The output end of the triac Q1 is connected to pin 6 of the third control chip U3.

[0010] In the described microwave dimming circuit, the dimming output unit further includes a thermistor NTC1, and the thermistor NTC1 is connected to the output end of the triac Q1.

[0011] In the described microwave dimming circuit, the power supply unit includes a rectifying and filtering section, a fourth control chip U4, and a fifth control chip U5. The input end of the rectifying and filtering section is respectively connected to the neutral line end and the live line end. The output end of the rectifying and filtering section is connected to pin 1 of the fourth control chip U4. Pin 2 of the fourth control chip U4 is connected to pin 1 of the fifth control chip U5. Pin 2 of the fifth control chip U5 is respectively connected to pin 4 of the first control chip U1 and the microwave sensing unit. The input end of the rectifying and filtering section is connected to the dimming output unit.

[0012] In the described microwave dimming circuit, the microwave dimming circuit further includes a zero-crossing detection unit. The input end of the zero-crossing detection unit is connected to the neutral line end, and the output end of the zero-crossing detection unit is connected to pin 5 of the first control chip U1.

[0013] In the described microwave dimming circuit, the zero-crossing detection unit includes a fourth diode D4, a fourth resistor R4, a fifth resistor R5, a sixth capacitor C6, and a second triode Q2. The positive electrode of the fourth diode D4 is connected to the neutral line end. The negative electrode of the fourth diode D4 is connected to one end of the fourth resistor R4. The other end of the fourth resistor is connected to the base of the second triode Q2. The collector of the second triode Q2 is respectively connected to one end of the fifth resistor R5 and pin 5 of the first control chip U1. The other end of the fifth resistor R5 is connected to the power supply unit. One end of the sixth capacitor C6 is connected to the base of the second triode Q2. The other end of the sixth capacitor C6 and the emitter of the second triode Q2 are grounded.

[0014] This application also provides a PCB board, on which the above-described microwave dimming circuit is printed.

[0015] This application also provides a controller, which uses the above-described microwave dimming circuit for working control.

[0016] Beneficial effects:

[0017] The utility model provides a microwave dimming circuit. The power supply unit respectively delivers working voltages to the main control unit, the microwave induction unit and the dimming output unit. The main control unit receives external dimming signals. When the microwave induction unit detects a human body microwave signal, it feeds back a start signal to the main control unit. The main control unit then sends a modulation signal to the dimming output unit according to the external dimming signal. The dimming output unit adjusts the chopping signal by controlling its on-off time, thereby realizing the control and adjustment of the light brightness. In the above way, the circuit can simultaneously realize the functions of microwave induction and dimming, effectively improving the user experience. Description of the Drawings

[0018] Figure 1 is the circuit block diagram of the microwave dimming circuit provided by the utility model;

[0019] Figure 2 is the circuit structure diagram of the microwave dimming circuit provided by the utility model.

[0020] Description of the main component symbols: 1 - power supply unit, 2 - main control unit, 3 - microwave induction unit, 4 - dimming output unit, 5 - zero-crossing detection unit. Detailed Embodiment

[0021] The utility model provides a microwave dimming circuit, a PCB board and its controller. To make the purpose, technical solution and effect of the utility model clearer and more definite, the following further elaborates on the utility model with reference to the attached drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0022] In the description of the utility model, it should be understood that the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0023] Please refer to Figures 1 to 2 , the utility model provides a microwave dimming circuit, including a power supply unit 1, a main control unit 2, a microwave induction unit 3 and a dimming output unit 4. The input end of the power supply unit 1 is respectively connected to the zero line end and the live line end. The output end of the power supply unit 1 is respectively connected to the main control unit 2, the microwave induction unit 3 and the dimming output unit 4. The main control unit 2 is respectively connected to the microwave induction unit 3 and the dimming output unit 4. The main control unit 2 is used to control the output signal of the dimming output unit 4 according to the induction signal of the microwave induction unit 3.

[0024] During actual use, the power supply unit 1 supplies working voltage to the main control unit 2, the microwave induction unit 3, and the dimming output unit 4 respectively. The main control unit 2 receives an external dimming signal. When the microwave induction unit 3 detects a human microwave signal, it feeds back a start signal to the main control unit 2. The main control unit 2 then sends a modulation signal to the dimming output unit 4 according to the external dimming signal. The dimming output unit 4 adjusts the chopping signal by controlling its on-off time, thereby realizing the control and adjustment of the light brightness. Through the above method, the circuit can simultaneously realize the functions of microwave induction and dimming, effectively improving the user experience.

[0025] As Figures 1 to 2 shown, further, the main control unit 2 includes a first control chip U1 and a DIP switch K1. The pin 4 of the first control chip U1 is connected to the power supply unit 1. The pins 1 to 6 of the DIP switch K1 are sequentially connected to the pins 1, 2, 3, 9, 10, and 6 of the first control chip U1. The microwave induction unit 3 is connected to the pin 7 of the first control chip U1. The dimming output unit 4 is connected to the pin 8 of the first control chip U1. During operation, the first control chip U1 is connected to an external dimmer. When the external dimmer sends a dimming signal to the first control chip U1, the first control chip U1 adjusts each code position on the DIP switch K1 through pins 1, 2, 3, 9, 10, and 6 to set the brightness level of the lamp. When the microwave induction unit 3 detects a human microwave signal, the microwave induction unit 3 sends a start signal to the main control unit 2. When the main control unit 2 receives this start signal, it will send a corresponding modulation signal to the dimming output unit 4 according to the brightness level preset by the DIP switch K1. The dimming output unit 4 will adjust its on-off time according to this modulation signal, thereby adjusting its chopping signal, so as to realize the control and adjustment of the light brightness.

[0026] In this embodiment, the first control chip U1 is a single-chip microcomputer chip of model A053E.

[0027] As Figures 1 to 2 shown, further, the microwave induction unit 3 includes a second control chip U2. The pin 1 of the second control chip U2 is connected to the pin 7 of the first control chip U1. The pin 2 of the second control chip U2 is grounded. The pin 3 of the second control chip U2 is connected to the power supply unit 1. During operation, when the second control chip U2 detects a human microwave signal, it sends a start signal to the pin 7 of the first control chip U1 through its pin 1, so that the first control chip U1 feeds back to control the dimming output unit 4.

[0028] In this embodiment, the second control chip U2 can be a microwave human body sensing module with the model number CDM324.

[0029] As Figures 1 to 2 shown, further, the dimming output unit 4 includes a third control chip U3 and a triac Q1. The pin 1 of the third control chip U3 is connected to the pin 8 of the first control chip U1. The input end of the triac Q1 is connected to the power supply unit 1. The control end of the triac Q1 is connected to the pin 4 of the third control chip U3. The output end of the triac Q1 is connected to the pin 6 of the third control chip U3. During use, electrical isolation is achieved among the triac Q1, the power supply unit 1, and the first control chip U1 through the third control chip U3. The third control chip U3 adjusts the duty cycle of the triac Q1 according to the modulation signal sent from the pin 8 of the first control chip U1, thereby adjusting the switching frequency of the triac Q1, and thus adjusting the chopping signal generated by the triac Q1, and adjusting the brightness level of the lamp by outputting different chopping signals.

[0030] In this embodiment, the third control chip U3 is an optocoupler chip with the model number MOC3022; the triac Q can be a triac with the model number MAC12.

[0031] As Figures 1 to 2 shown, further, the dimming output unit 4 further includes a thermistor NTC1. The thermistor NTC1 is connected to the output end of the triac Q1. During use, the thermistor NTC1 is used to detect the operating temperature of the output end of the triac Q1. If the temperature of the output end is detected to be too high, the characteristics of the thermistor NTC1 are used to protect the lamp from overheating.

[0032] As Figures 1 to 2As shown, further, the power supply unit 1 includes a rectification and filtering section, a fourth control chip U4, and a fifth control chip U5. The input end of the rectification and filtering section is respectively connected to the neutral line end and the live line end. The output end of the rectification and filtering section is connected to pin 1 of the fourth control chip U4. Pin 2 of the fourth control chip U4 is connected to pin 1 of the fifth control chip U5. Pin 2 of the fifth control chip U5 is respectively connected to pin 4 of the first control chip U1 and the microwave induction unit 3. The input end of the rectification and filtering section is connected to the dimming output unit 4. During use, the rectification and filtering section rectifies and filters the AC voltage input from the neutral line end and the live line end, and then inputs the rectified and filtered voltage to the fourth control chip U4. The fourth control chip U4 steps down the front-end input voltage signal, and then the fifth control chip U5 stabilizes the stepped-down voltage signal to obtain a stable voltage for the first control chip U1 and the second control chip U2 to use.

[0033] In this embodiment, the fourth control chip U4 can be a step-down chip with the model number 78M12, and the fifth control chip U5 can be a voltage stabilizing chip with the model number 78M05.

[0034] It should be noted that the rectification and filtering section is composed of a fuse FR1, a varistor MOV1, a first diode D1, a first tantalum capacitor CE1, a second diode D2, a first capacitor C1, a first inductor L1, a third diode D3, and a zener diode ZD1. The above components form a step-down rectification and filtering circuit with the fourth control chip U4.

[0035] As Figures 1 to 2 shown, further, the microwave dimming circuit further includes a zero-crossing detection unit 5. The input end of the zero-crossing detection unit 5 is connected to the neutral line end, and the output end of the zero-crossing detection unit 5 is connected to pin 5 of the first control chip U1. The zero-crossing detection unit 5 is used to detect the input situation of the neutral line end, avoiding the problem that abnormal input of the neutral line end and the live line end causes circuit damage.

[0036] As Figures 1 to 2As shown, further, the zero-crossing detection unit 5 includes a fourth diode D4, a fourth resistor R4, a fifth resistor R5, a sixth capacitor C6, and a second triode Q2. The positive electrode of the fourth diode D4 is connected to the neutral line terminal. The negative electrode of the fourth diode D4 is connected to one end of the fourth resistor R4. The other end of the fourth resistor is connected to the base of the second triode Q2. The collector of the second triode Q2 is respectively connected to one end of the fifth resistor R5 and the pin 5 of the first control chip U1. The other end of the fifth resistor R5 is connected to the power supply unit 1. One end of the sixth capacitor C6 is connected to the base of the second triode Q2. The other end of the sixth capacitor C6 and the emitter of the second triode Q2 are grounded. A zero-crossing detection circuit is formed by the fourth diode D4, the fourth resistor R4, the fifth resistor R5, the sixth capacitor C6, and the second triode Q2. By obtaining the input signal of the neutral line terminal and comparing it with the sampling signal of the power supply unit 1, it is judged whether the inputs of the neutral line terminal and the live line terminal are abnormal.

[0037] The present application also provides a PCB board, on which the microwave dimming circuit as described above is printed.

[0038] The present application also provides a controller, which uses the microwave dimming circuit as described above for working control.

[0039] In summary, the power supply unit 1 respectively supplies working voltages to the main control unit 2, the microwave induction unit 3, and the dimming output unit 4. The main control unit 2 receives external dimming signals. When the microwave induction unit 3 detects a human body microwave signal, it feeds back a start signal to the main control unit 2. The main control unit 2 then sends a modulation signal to the dimming output unit 4 according to the external dimming signal. The dimming output unit 4 adjusts the chopping signal by controlling its on-off time, thereby realizing the control and adjustment of the light brightness. In the above manner, the circuit can simultaneously realize the functions of microwave induction and dimming, effectively improving the user experience.

[0040] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and the inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the claims appended to the present invention.

Claims

1. A microwave dimming circuit, characterized in that, It includes a power supply unit, a main control unit, a microwave induction unit, and a dimming output unit. The input terminals of the power supply unit are respectively connected to the neutral terminal and the live terminal. The output terminals of the power supply unit are respectively connected to the main control unit, the microwave induction unit, and the dimming output unit. The main control unit is respectively connected to the microwave induction unit and the dimming output unit. The main control unit is used to control the output signal of the dimming output unit according to the induction signal of the microwave induction unit. The main control unit includes a first control chip U1 and a DIP switch K1. The pin 4 of the first control chip U1 is connected to the power supply unit. The pins 1 to 6 of the DIP switch K1 are sequentially connected to the pins 1, 2, 3, 9, 10, and 6 of the first control chip U1. The microwave induction unit is connected to the pin 7 of the first control chip U1. The dimming output unit is connected to the pin 8 of the first control chip U1.

2. The microwave dimming circuit according to claim 1, characterized in that, The microwave induction unit includes a second control chip U2. The pin 1 of the second control chip U2 is connected to the pin 7 of the first control chip U1. The pin 2 of the second control chip U2 is grounded. The pin 3 of the second control chip U2 is connected to the power supply unit.

3. The microwave dimming circuit according to claim 1, wherein The dimming output unit includes a third control chip U3 and a triac Q1. The pin 1 of the third control chip U3 is connected to the pin 8 of the first control chip U1. The input terminal of the triac Q1 is connected to the power supply unit. The control terminal of the triac Q1 is connected to the pin 4 of the third control chip U3. The output terminal of the triac Q1 is connected to the pin 6 of the third control chip U3.

4. The microwave dimming circuit according to claim 3, characterized in that, The dimming output unit further includes a thermistor NTC1. The thermistor NTC1 is connected to the output terminal of the triac Q1.

5. The microwave dimming circuit according to claim 1, wherein The power supply unit includes a rectifier filter section, a fourth control chip U4, and a fifth control chip U5. The input terminals of the rectifier filter section are respectively connected to the neutral terminal and the live terminal. The output terminal of the rectifier filter section is connected to the pin 1 of the fourth control chip U4. The pin 2 of the fourth control chip U4 is connected to the pin 1 of the fifth control chip U5. The pin 2 of the fifth control chip U5 is respectively connected to the pin 4 of the first control chip U1 and the microwave induction unit. The input terminal of the rectifier filter section is connected to the dimming output unit.

6. The microwave dimming circuit according to claim 1, wherein The microwave dimming circuit further includes a zero-crossing detection unit. The input terminal of the zero-crossing detection unit is connected to the neutral terminal. The output terminal of the zero-crossing detection unit is connected to the pin 5 of the first control chip U1.

7. The microwave dimming circuit according to claim 6, wherein The zero-crossing detection unit includes a fourth diode D4, a fourth resistor R4, a fifth resistor R5, a sixth capacitor C6, and a second triode Q2. The positive electrode of the fourth diode D4 is connected to the neutral line terminal. The negative electrode of the fourth diode D4 is connected to one end of the fourth resistor R4. The other end of the fourth resistor is connected to the base of the second triode Q2. The collector of the second triode Q2 is respectively connected to one end of the fifth resistor R5 and pin 5 of the first control chip U1. The other end of the fifth resistor R5 is connected to the power supply unit. One end of the sixth capacitor C6 is connected to the base of the second triode Q2. The other end of the sixth capacitor C6 and the emitter of the second triode Q2 are grounded.

8. A PCB board, characterized in that, The microwave dimming circuit according to any one of claims 1-7 is printed on the PCB board.

9. A controller, characterized in that, The controller uses the microwave dimming circuit according to any one of claims 1-7 to perform work control.

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