Data communication circuit for multiplexing dimming wire of single lamp controller

Abstract

The utility model discloses a data communication circuit of a multiplexing dimming line of a single lamp controller. The data communication circuit comprises a processor circuit, a dimming circuit, a communication circuit and a voltage detection circuit. The processor circuit is connected with the dimming circuit through PWM and GPIO interfaces; the processor circuit is connected with the communication circuit through a serial port USART; the processor circuit is connected with the voltage detection circuit through an ADC interface; the dimming line is multiplexed by the dimming circuit and the communication circuit. The processor circuit automatically identifies whether the light modulation line is connected with the LED driver or the data communication device by detecting the difference of the voltage on the light modulation line, thereby achieving the purpose of multiplexing the light modulation line. A single-lamp controller for urban lighting is large in number of points and difficult to debug and maintain on site. According to the utility model, the dimming line of the single lamp controller is utilized, so that the problem of pain points troubling the industry is effectively solved on the premise of saving the cost as much as possible, and the maintenance cost of the single lamp controller is reduced.

Description

Technical Field

[0001] The utility model relates to the field of intelligent urban lighting, in particular to a data communication circuit for a single lamp controller with multiplexed dimming light. Background Art

[0002] With the accelerated development of my country's urbanization process, the scale of urban roads is expanding. Streetlights, as important municipal facilities, are becoming more and more numerous. In order to achieve the goals of intelligent management and control and energy conservation and carbon reduction, many cities have adopted single-lamp controllers for streetlights. The single-lamp controllers currently on the market are designed to achieve an IP67 protection level, and most of them are fully potted. At the same time, in order to save costs, no debugging interface is reserved. When an abnormality occurs in the equipment, it cannot be debugged and tested on site, and the equipment can only be sent back to the manufacturer for repair, which is inefficient. The equipment that is returned for repair can only be tested by opening the casing and removing the potting glue to expose the debugging interface. However, it is also very easy to cause secondary damage to the equipment during the disassembly process, which increases the difficulty of detection. In order to solve the defects of the existing single-lamp controllers that are difficult to debug and maintain, the utility model proposes a data communication circuit for a single-lamp controller with multiplexing dimming lines. Utility Model Content

[0003] Technical purpose: In order to solve the defects of the existing single-lamp controller that are difficult to debug and maintain, the utility model provides a data communication circuit of a single-lamp controller with multiplexing dimming lines, so that the single-lamp controller and the debugging terminal establish a data communication link through the dimming line. Without opening the shell to remove the potting glue, the single-lamp controller can realize the working parameter setting / query, communication parameter setting / query, working condition data query, fault data query, light switch control and firmware upgrade and other functions.

[0004] In order to achieve the above technical objectives, the technical solution adopted by this utility model is:

[0005] A data communication circuit for a single-lamp controller multiplexing a dimming line includes a processor circuit, a dimming circuit, a communication circuit, and a voltage detection circuit, wherein: the dimming circuit, the communication circuit, and the voltage detection circuit are all connected to the processor circuit; the processor circuit and the voltage detection circuit are connected via an ADC interface, and the voltage detection circuit is used to detect the voltage of the dimming line and feed it back to the processor circuit; the processor circuit and the dimming circuit are connected via PWM and GPIO interfaces, and the dimming circuit is used to detect the voltage of the dimming line and then perform voltage judgment, thereby controlling the processor circuit to enable the dimming function; the processor circuit and the communication circuit are connected via a USART serial port, and the communication circuit is used to detect the voltage of the dimming line and then perform voltage judgment, thereby controlling the processor circuit to complete the data communication function; the dimming circuit and the communication circuit multiplex the dimming line in the single-lamp controller, and the dimming line is connected to an LED street lamp and a debugging terminal.

[0006] Preferably, the processor circuit includes a capacitor C7, a capacitor C8, a crystal oscillator Y1 and a processor chip IC3, wherein:

[0007] The first end of capacitor C7 is grounded, and the second end of capacitor C7 is connected to the first end of crystal oscillator Y1; the first end of capacitor C8 is grounded, and the second end of capacitor C8 is connected to the second end of crystal oscillator Y1; the first end of crystal oscillator Y1 is connected to pin 5 of processor chip IC3, and the second end of crystal oscillator Y1 is connected to pin 6 of processor chip IC3; pin 17 of processor chip IC3 is used to output PWM signal, pin 29 of processor chip IC3 is used as ADC pin, pin 30 and pin 31 of processor chip IC3 are used to transmit U1TX signal and U1RX signal; pin 32 of processor chip IC3 is used to receive DIM-EN signal.

[0008] Preferably, the model of the processor chip IC3 is STM32F030C8.

[0009] Preferably, the dimming circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a MOS transistor VT1, a MOS transistor VT3, a transistor VT2 and an operational amplifier chip IC1, wherein:

[0010] The first end of the resistor R1 is connected to pin 17 of the processor chip IC3, that is, it receives the PWM signal output by the processor circuit 1, and the second end of the resistor R1 is grounded; the first end of the resistor R2 is connected to +10V, and the second end of the resistor R2 is connected to the third pin of the MOS tube VT3; the first pin of the MOS tube VT3 is connected to the first end of the resistor R1, and the second pin of the MOS tube VT3 is grounded; the first end of the resistor R3 is connected to the third pin of the MOS tube VT3, and the second end of the resistor R3 is connected to the first end of the resistor R4; the second end of the resistor R4 is connected to the third pin of the operational amplifier chip IC1; the capacitor C3 The first end of the resistor R3 is connected to the second end of the resistor R3, and the second end of the capacitor C3 is grounded; the first end of the capacitor C4 is connected to the 3rd pin of the operational amplifier chip IC1, and the second end of the capacitor C4 is grounded; the first end of the resistor R5 is connected to the 1st and 2nd pins of the operational amplifier chip IC1, and the second end of the resistor R5 is grounded; the first end of the resistor R6 is connected to +12V, the second end of the resistor R6 is connected to the first end of the capacitor C1, and the second end of the capacitor C1 is grounded; the first pin of the MOS tube VT1 is connected to the second end of the resistor R6, and the second pin of the MOS tube VT1 is connected to the 1st and 2nd pins of the operational amplifier chip IC1. Pin 3 of MOS tube VT1 is connected to the dimming light voltage, that is, the D+ signal; the first end of resistor R7 is connected to pin 1 of transistor VT2, and the second end of resistor R7 is connected to pin 32 of processor chip IC3. Pin 32 of processor chip IC3 transmits the DIM-EN signal to realize the on / off dimming output function; pin 2 of transistor VT2 is grounded, and pin 3 of transistor VT2 is connected to pin 1 of MOS tube VT1; the first end of resistor R8 is connected to +3.3V, and the second end of resistor R8 is connected to pin 32 of processor chip IC3; the first end of capacitor C2 is connected to +12V, and the second end of capacitor C2 is grounded; pin 8 of operational amplifier chip IC1 is connected to +12V, and pin 4 of operational amplifier chip IC1 is grounded.

[0011] Preferably, the operational amplifier chip IC1 adopts a model of LM358.

[0012] Preferably, the communication circuit includes a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a transistor VT4, a transistor VT5, a transistor VT7, a MOS transistor VT6, and a TVS transistor VD1, wherein:

[0013] A first end of resistor R9 is connected to +3.3V, a second end of resistor R9 is connected to pin 30 of processor chip IC3, and pin 30 of processor chip IC3 transmits U1TX signal; a first end of resistor R10 is connected to pin 30 of processor chip IC3, and a second end of resistor R10 is connected to pin 1 of transistor VT4; a first end of resistor R11 is connected to +3.3V, a second end of resistor R11 is connected to pin 3 of transistor VT4, and pin 2 of transistor VT4 is grounded; a first end of resistor R12 is connected to the dimming light voltage, i.e., D+ signal, a second end of resistor R12 is connected to pin 3 of transistor VT5, pin 1 of transistor VT5 is connected to pin 3 of transistor VT4, and pin 2 of transistor VT5 is grounded; a first end of TVS tube VD1 is connected to the dimming light voltage, i.e., D+ signal, and a second end of TVS tube VD1 is grounded;

[0014] The first end of the resistor R13 is connected to the dimming light voltage, that is, the D+ signal, and the second end of the resistor R13 is connected to the 1st pin of the MOS tube VT6; the first end of the resistor R14 is connected to +3.3V, the second end of the resistor R14 is connected to the 3rd pin of the MOS tube VT6, and the 2nd pin of the MOS tube VT6 is grounded; the first end of the resistor R15 is connected to +3.3V, the second end of the resistor R15 is connected to the 31st pin of the processor chip IC3, and the 31st pin of the processor chip IC3 transmits the U1RX signal; the 1st pin of the transistor VT7 is connected to the 3rd pin of the MOS tube VT6, the 2nd pin of the transistor VT7 is grounded, the 3rd pin of the transistor VT7 is connected to the 31st pin of the processor chip IC3, and the 31st pin of the processor chip IC3 transmits the U1RX signal.

[0015] Preferably, the voltage detection circuit includes a resistor R16, a resistor R17, a resistor R18, a capacitor C5, a capacitor C6 and an operational amplifier chip IC2, wherein:

[0016] A first end of resistor R16 is connected to pins 1 and 2 of the operational amplifier chip IC2, and a second end of resistor R16 is connected to pin 29 of the processor chip IC3, which transmits the ADC signal; a first end of resistor R17 is connected to pin 29 of the processor chip IC3, and a second end of resistor R17 is grounded; a first end of resistor R18 is connected to the dimming light voltage, i.e., the D+ signal, and a second end of resistor R18 is connected to pin 3 of the operational amplifier chip IC2; a first end of capacitor C6 is connected to pin 29 of the processor chip IC3, and a second end of capacitor C6 is grounded; a first end of capacitor C5 is connected to pin 8 of the operational amplifier chip IC2, and a second end of capacitor C5 is grounded; pin 8 of the operational amplifier chip IC2 is connected to +12V, and pin 4 of the operational amplifier chip IC2 is grounded.

[0017] Preferably, the operational amplifier chip IC2 is LM358.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The dimming line can be used to dim LED lamps and perform fault detection, parameter configuration, switch control, and firmware upgrades on single-lamp controllers. Without adding additional debugging lines, on-site debugging and maintenance functions of single-lamp controllers are realized. When returning to the factory for repair, the single-lamp controller can be inspected and repaired without opening the casing or removing the potting glue, which improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a principle block diagram of the utility model;

[0021] Figure 2 This is the principle diagram of the dimming circuit of the utility model;

[0022] Figure 3 This is a schematic diagram of the communication circuit of the present utility model;

[0023] Figure 4 This is a schematic diagram of the voltage detection circuit of the utility model;

[0024] Figure 5 This is a schematic diagram of the processor circuit of the present utility model. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] like Figure 1 As shown, the data communication circuit of a single lamp controller multiplexing dimming line described in the utility model includes a processor circuit 1, a dimming circuit 2, a communication circuit 3, and a voltage detection circuit 4, wherein the dimming circuit 2, the communication circuit 3, and the voltage detection circuit 4 are all connected to the processor circuit 1; the processor circuit 1 and the dimming circuit 2 are connected through the PWM and GPIO interfaces; the processor circuit 1 and the communication circuit 3 are connected through the serial port USART; the processor circuit 1 and the voltage detection circuit 4 are connected through the ADC interface; the dimming circuit 2 and the communication circuit 3 multiplex the dimming line in the single lamp controller, and the dimming line is connected to the LED street lamp and the debugging terminal.

[0027] like Figure 2 As shown, Figure 2 This is a schematic diagram of a dimming circuit 2 in one embodiment of the present invention. The processor circuit 1 is connected to the dimming circuit 2 via PWM and GPIO interfaces. The inputs to the dimming circuit 2 are the dimming line voltage Vd obtained by D+ signal detection and the PWM signal output by the processor circuit 1. The dimming circuit 2 outputs a DIM-EN signal to the processor circuit 1, which is used to detect the dimming line voltage and perform voltage judgment, thereby controlling the processor circuit 1 to enable the dimming function.

[0028] The dimming circuit 2 includes resistors R1, R2, R3, R4, R5, R6, R7, R8, capacitors C1, C2, C3, C4, MOS transistors VT1, MOS transistors VT3, transistors VT2, and an operational amplifier chip IC1. The operational amplifier chip IC1 uses an LM358, which converts the PWM signal into a 0-10V dimming signal. By controlling the DIM-EN signal, the dimming output function can be turned on / off.

[0029] The first end of the resistor R1 is connected to pin 17 of the processor chip IC3, that is, it receives the PWM signal output by the processor circuit 1, and the second end of the resistor R1 is grounded; the first end of the resistor R2 is connected to +10V, and the second end of the resistor R2 is connected to pin 3 of the MOS tube VT3; the first end of the MOS tube VT3 is connected to the first end of the resistor R1, and the second end of the MOS tube VT3 is grounded; the first end of the resistor R3 is connected to pin 3 of the MOS tube VT3, and the second end of the resistor R3 is connected to the first end of the resistor R4; the second end of the resistor R4 is connected to pin 3 of the operational amplifier chip IC1; the first end of the capacitor C3 is connected to the second end of the resistor R3, and the second end of the capacitor C3 is grounded; the first end of the capacitor C4 is connected to pin 3 of the operational amplifier chip IC1, and the second end of the capacitor C4 is grounded; the first end of the resistor R5 is connected to pins 1 and 2 of the operational amplifier chip IC1, and the second end of the resistor R5 is grounded; the first end of the resistor R6 is connected to +12V, and the second end of the resistor R6 is connected to the The first end of capacitor C1 and the second end of capacitor C1 are grounded; the first pin of MOS tube VT1 is connected to the second end of resistor R6, the second pin of MOS tube VT1 is connected to pins 1 and 2 of operational amplifier chip IC1, and the third pin of MOS tube VT1 is connected to the dimming light voltage, that is, the D+ signal; the first end of resistor R7 is connected to pin 1 of transistor VT2, the second end of resistor R7 is connected to pin 32 of processor chip IC3, and pin 32 of processor chip IC3 transmits the DIM-EN signal for realizing the on / off dimming output function; the second pin of transistor VT2 is grounded, and the third pin of transistor VT2 is connected to pin 1 of MOS tube VT1; the first end of resistor R8 is connected to +3.3V, and the second end of resistor R8 is connected to pin 32 of processor chip IC3; the first end of capacitor C2 is connected to +12V, and the second end of capacitor C2 is grounded; the 8th pin of operational amplifier chip IC1 is connected to +12V, and the 4th pin of operational amplifier chip IC1 is grounded. The first, second and third pins of the MOS tube VT3 and the MOS tube VT1 are the gate, source and drain respectively; the first, second and third pins of the transistor VT2 are the base, emitter and collector respectively.

[0030] like Figure 3 As shown, Figure 3This is a schematic diagram of a communication circuit 3 in one embodiment of the present invention. The processor circuit 1 is connected to the communication circuit 3 via a serial port USART. The communication circuit 3 includes resistors R9, R10, R11, R12, R13, R14, R15, transistors VT4, VT5, VT7, MOS transistor VT6, and TVS transistor VD1. The communication circuit 3 is used to detect the dimming line voltage and perform voltage judgment, controlling the processor circuit 1 to complete the data communication function. The data communication function is realized, and when the dimming output function is turned off, data communication can be performed with the debugging terminal. Among them:

[0031] A first end of resistor R9 is connected to +3.3V, a second end of resistor R9 is connected to pin 30 of processor chip IC3, and pin 30 of processor chip IC3 transmits U1TX signal; a first end of resistor R10 is connected to pin 30 of processor chip IC3, and a second end of resistor R10 is connected to pin 1 of transistor VT4; a first end of resistor R11 is connected to +3.3V, a second end of resistor R11 is connected to pin 3 of transistor VT4, and pin 2 of transistor VT4 is grounded; a first end of resistor R12 is connected to the dimming light voltage, i.e., D+ signal, a second end of resistor R12 is connected to pin 3 of transistor VT5, pin 1 of transistor VT5 is connected to pin 3 of transistor VT4, and pin 2 of transistor VT5 is grounded; a first end of TVS tube VD1 is connected to the dimming light voltage, i.e., D+ signal, and a second end of TVS tube VD1 is grounded;

[0032] The first terminal of resistor R13 is connected to the dimming light voltage, i.e., the D+ signal, and the second terminal of resistor R13 is connected to pin 1 of MOS transistor VT6. The first terminal of resistor R14 is connected to +3.3V, the second terminal of resistor R14 is connected to pin 3 of MOS transistor VT6, and pin 2 of MOS transistor VT6 is grounded. The first terminal of resistor R15 is connected to +3.3V, and the second terminal of resistor R15 is connected to pin 31 of processor chip IC3, which transmits the U1RX signal. The first pin of transistor VT7 is connected to pin 3 of MOS transistor VT6, the second pin of transistor VT7 is grounded, and the third pin of transistor VT7 is connected to pin 31 of processor chip IC3, which transmits the U1RX signal. Pins 1, 2, and 3 of MOS transistor VT6 are the gate, source, and drain, respectively. Pins 1, 2, and 3 of transistors VT4, VT5, and VT7 are the base, emitter, and collector, respectively.

[0033] like Figure 4 As shown, Figure 4 This is a schematic diagram of a voltage detection circuit 4 in an embodiment of the present invention. The processor circuit 1 is connected to the voltage detection circuit 4 via an ADC interface. The voltage detection circuit 4 is used to detect the dimming light voltage and transmit it to the processor circuit 1 via the ADC interface.

[0034] The voltage detection circuit 4 includes a resistor R16, a resistor R17, a resistor R18, a capacitor C5, a capacitor C6 and an operational amplifier chip IC2. The operational amplifier chip IC2 adopts the model LM358, which realizes the function of detecting the dimming line voltage.

[0035] A first end of resistor R16 is connected to pins 1 and 2 of the operational amplifier chip IC2, and a second end of resistor R16 is connected to pin 29 of the processor chip IC3, which transmits the ADC signal; a first end of resistor R17 is connected to pin 29 of the processor chip IC3, and a second end of resistor R17 is grounded; a first end of resistor R18 is connected to the dimming light voltage, i.e., the D+ signal, and a second end of resistor R18 is connected to pin 3 of the operational amplifier chip IC2; a first end of capacitor C6 is connected to pin 29 of the processor chip IC3, and a second end of capacitor C6 is grounded; a first end of capacitor C5 is connected to pin 8 of the operational amplifier chip IC2, and a second end of capacitor C5 is grounded; pin 8 of the operational amplifier chip IC2 is connected to +12V, and pin 4 of the operational amplifier chip IC2 is grounded.

[0036] like Figure 5 As shown, Figure 5 This is a schematic diagram of a processor circuit 1 in one embodiment of the present invention. The processor circuit 1 includes capacitors C7 and C8, a crystal oscillator Y1, and a processor chip IC3. The processor chip IC3 is an STM32F030C8 and is used to implement functions such as PWM signal output, dimming output function switch control, data communication, and logic processing. The logic processing is to perform voltage judgment on the dimming line multiplexing, that is, based on the dimming line voltage, determine whether the dimming line is connected to the LED street light for dimming or to the debugging terminal, and perform data communication through the communication circuit. Among them:

[0037] The first end of capacitor C7 is grounded, and the second end of capacitor C7 is connected to the first end of crystal oscillator Y1. The first end of capacitor C8 is grounded, and the second end of capacitor C8 is connected to the second end of crystal oscillator Y1. The first end of crystal oscillator Y1 is connected to pin 5 of processor chip IC3, and the second end of crystal oscillator Y1 is connected to pin 6 of processor chip IC3. Pins 1, 9, 24, and 48 of processor chip IC3 are connected to +3.3V, and pins 8, 23, and 47 of processor chip IC3 are grounded. Pin 17 of processor chip IC3 is used to output a PWM signal, pin 29 of processor chip IC3 is used as an ADC pin, pins 30 and 31 of processor chip IC3 are used to transmit the U1TX signal and U1RX signal, and pin 32 of processor chip IC3 is used to receive the DIM-EN signal.

[0038] The operating principle of this utility model is as follows: After the single-lamp controller is powered on, the voltage detection circuit 4 detects the voltage Vd of the dimming line in the single-lamp controller. The dimming line voltage Vd is detected via the D+ signal. When 9V < Vd < 12V, it indicates that the dimming line is connected to the LED street light. At this time, the processor circuit 1 enables the dimming function, allowing the LED street light to be dimmed from 0 to 10V. When 4V < Vd < 6V, it indicates that the dimming line is connected to the debugging terminal. The processor circuit 1 enables the data communication function and conducts data communication through the communication circuit. By detecting the difference in voltage on the dimming line, the processor circuit automatically identifies whether the dimming line is connected to the LED street light driver and then dims the LED street light or connects to the communication circuit through the communication circuit to the debugging terminal, achieving the purpose of multiplexing the dimming line. Single-lamp controllers for urban lighting are numerous and large in number, making on-site debugging and maintenance difficult. This utility model utilizes the dimming line of the single-lamp controller to effectively solve the industry's pain points while minimizing costs and reducing the maintenance costs of single-lamp controllers.

[0039] Through the above circuit setting, the utility model can dim the LED lamp based on the dimming line of the single lamp controller, and can also perform fault detection, parameter configuration, switch control and firmware upgrade on the single lamp controller through the dimming line; without adding additional debugging lines, the on-site debugging and maintenance functions of the single lamp controller can be realized; when returning to the factory for repair, the single lamp controller can be inspected and repaired without opening the shell and removing the potting glue, thereby improving work efficiency.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A data communication circuit for a single lamp controller multiplexing dimming line, characterized in that: The invention comprises a processor circuit (1), a dimming circuit (2), a communication circuit (3), and a voltage detection circuit (4), wherein the dimming circuit (2), the communication circuit (3), and the voltage detection circuit (4) are all connected to the processor circuit (1); the processor circuit (1) and the voltage detection circuit (4) are connected via an ADC interface, and the voltage detection circuit (4) is used to detect the voltage of the dimming line and feed it back to the processor circuit (1); the processor circuit (1) and the dimming circuit (2) are connected via a PWM and GPIO interface, and the dimming circuit (2) is used to detect the voltage of the dimming line and then make a voltage judgment, thereby controlling the processor circuit (1) to enable the dimming function; the processor circuit (1) and the communication circuit (3) are connected via a serial port USART, and the communication circuit (3) is used to detect the voltage of the dimming line and then make a voltage judgment, thereby controlling the processor circuit (1) to complete the data communication function; the dimming circuit (2) and the communication circuit (3) multiplex the dimming line in the single lamp controller, and the dimming line is connected to the LED street lamp and the debugging terminal.

2. The data communication circuit for a single lamp controller multiplexing dimming line according to claim 1, characterized in that: The processor circuit (1) includes a capacitor C7, a capacitor C8, a crystal oscillator Y1 and a processor chip IC3, wherein: The first end of capacitor C7 is grounded, and the second end of capacitor C7 is connected to the first end of crystal oscillator Y1; the first end of capacitor C8 is grounded, and the second end of capacitor C8 is connected to the second end of crystal oscillator Y1; the first end of crystal oscillator Y1 is connected to pin 5 of processor chip IC3, and the second end of crystal oscillator Y1 is connected to pin 6 of processor chip IC3; pin 17 of processor chip IC3 is used to output PWM signal, pin 29 of processor chip IC3 is used as ADC pin, pin 30 and pin 31 of processor chip IC3 are used to transmit U1TX signal and U1RX signal; pin 32 of processor chip IC3 is used to receive DIM-EN signal.

3. The data communication circuit for a single lamp controller multiplexing dimming line according to claim 2, characterized in that: The model of the processor chip IC3 is STM32F030C8.

4. The data communication circuit for multiplexing dimming lines of a single lamp controller according to claim 2, characterized in that: The dimming circuit (2) comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a MOS tube VT1, a MOS tube VT3, a transistor VT2 and an operational amplifier chip IC1, wherein: The first end of the resistor R1 is connected to the 17th pin of the processor chip IC3, that is, the PWM signal output by the receiving processor circuit (1), and the second end of the resistor R1 is grounded; the first end of the resistor R2 is connected to +10V, and the second end of the resistor R2 is connected to the 3rd pin of the MOS tube VT3; the first pin of the MOS tube VT3 is connected to the first end of the resistor R1, and the second pin of the MOS tube VT3 is grounded; the first end of the resistor R3 is connected to the 3rd pin of the MOS tube VT3, and the second end of the resistor R3 is connected to the first end of the resistor R4; the second end of the resistor R4 is connected to the 3rd pin of the operational amplifier chip IC1; the capacitor C The first terminal of resistor R3 is connected to the second terminal of resistor R3, and the second terminal of capacitor C3 is grounded; the first terminal of capacitor C4 is connected to the third pin of operational amplifier chip IC1, and the second terminal of capacitor C4 is grounded; the first terminal of resistor R5 is connected to the first and second pins of operational amplifier chip IC1, and the second terminal of resistor R5 is grounded; the first terminal of resistor R6 is connected to +12V, the second terminal of resistor R6 is connected to the first terminal of capacitor C1, and the second terminal of capacitor C1 is grounded; the first pin of MOS tube VT1 is connected to the second terminal of resistor R6, and the second pin of MOS tube VT1 is connected to the first and second pins of operational amplifier chip IC1. Pin 3 of MOS tube VT1 is connected to the dimming light voltage, that is, the D+ signal; the first end of resistor R7 is connected to pin 1 of transistor VT2, and the second end of resistor R7 is connected to pin 32 of processor chip IC3. Pin 32 of processor chip IC3 transmits the DIM-EN signal to realize the on / off dimming output function; pin 2 of transistor VT2 is grounded, and pin 3 of transistor VT2 is connected to pin 1 of MOS tube VT1; the first end of resistor R8 is connected to +3.3V, and the second end of resistor R8 is connected to pin 32 of processor chip IC3; the first end of capacitor C2 is connected to +12V, and the second end of capacitor C2 is grounded; pin 8 of operational amplifier chip IC1 is connected to +12V, and pin 4 of operational amplifier chip IC1 is grounded.

5. The data communication circuit for multiplexing dimming lines of a single lamp controller according to claim 4, characterized in that: The operational amplifier chip IC1 is LM358.

6. The data communication circuit for multiplexing dimming lines of a single lamp controller according to claim 2, characterized in that: The communication circuit (3) includes a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a transistor VT4, a transistor VT5, a transistor VT7, a MOS transistor VT6, and a TVS transistor VD1, wherein: A first end of resistor R9 is connected to +3.3V, a second end of resistor R9 is connected to pin 30 of processor chip IC3, and pin 30 of processor chip IC3 transmits U1TX signal; a first end of resistor R10 is connected to pin 30 of processor chip IC3, and a second end of resistor R10 is connected to pin 1 of transistor VT4; a first end of resistor R11 is connected to +3.3V, a second end of resistor R11 is connected to pin 3 of transistor VT4, and pin 2 of transistor VT4 is grounded; a first end of resistor R12 is connected to the dimming light voltage, i.e., D+ signal, a second end of resistor R12 is connected to pin 3 of transistor VT5, pin 1 of transistor VT5 is connected to pin 3 of transistor VT4, and pin 2 of transistor VT5 is grounded; a first end of TVS tube VD1 is connected to the dimming light voltage, i.e., D+ signal, and a second end of TVS tube VD1 is grounded; The first end of the resistor R13 is connected to the dimming light voltage, that is, the D+ signal, and the second end of the resistor R13 is connected to the 1st pin of the MOS tube VT6; the first end of the resistor R14 is connected to +3.3V, the second end of the resistor R14 is connected to the 3rd pin of the MOS tube VT6, and the 2nd pin of the MOS tube VT6 is grounded; the first end of the resistor R15 is connected to +3.3V, the second end of the resistor R15 is connected to the 31st pin of the processor chip IC3, and the 31st pin of the processor chip IC3 transmits the U1RX signal; the 1st pin of the transistor VT7 is connected to the 3rd pin of the MOS tube VT6, the 2nd pin of the transistor VT7 is grounded, the 3rd pin of the transistor VT7 is connected to the 31st pin of the processor chip IC3, and the 31st pin of the processor chip IC3 transmits the U1RX signal.

7. The data communication circuit for multiplexing dimming lines of a single lamp controller according to claim 2, characterized in that: The voltage detection circuit (4) includes a resistor R16, a resistor R17, a resistor R18, a capacitor C5, a capacitor C6 and an operational amplifier chip IC2, wherein: A first end of resistor R16 is connected to pins 1 and 2 of the operational amplifier chip IC2, and a second end of resistor R16 is connected to pin 29 of the processor chip IC3, which transmits the ADC signal; a first end of resistor R17 is connected to pin 29 of the processor chip IC3, and a second end of resistor R17 is grounded; a first end of resistor R18 is connected to the dimming light voltage, i.e., the D+ signal, and a second end of resistor R18 is connected to pin 3 of the operational amplifier chip IC2; a first end of capacitor C6 is connected to pin 29 of the processor chip IC3, and a second end of capacitor C6 is grounded; a first end of capacitor C5 is connected to pin 8 of the operational amplifier chip IC2, and a second end of capacitor C5 is grounded; pin 8 of the operational amplifier chip IC2 is connected to +12V, and pin 4 of the operational amplifier chip IC2 is grounded.

8. The data communication circuit for multiplexing dimming lines of a single lamp controller according to claim 7, characterized in that: The operational amplifier chip IC2 is LM358.

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