Control circuit for converting PLC signal into analog signal and dimming controller

Abstract

The utility model provides a PLC signal conversion analog signal control circuit and a dimming controller. The PLC signal conversion analog signal control circuit comprises a rectification conversion circuit, a switch control circuit, a PLC coupling circuit, an analysis module and an analog signal control circuit. The PLC coupling circuit couples a power line carrier communication signal to the analysis module through a surge protection diode and an isolation coupler. The analysis module is responsible for analyzing and converting the signals and then transmitting the signals to the analog signal control circuit. The analog signal control circuit is composed of a cold light control chip and a warm light control chip, receives the analyzed signals and outputs analog signals to a lamp light source, and precise control over dimming and color modulation of the intelligent lamp is achieved. The problem that a power line carrier communication signal is not matched with an intelligent dimming and color adjusting lamp signal is avoided, the brightness and color temperature of the lamp can be adjusted without additional wiring, and the universality of the control circuit for converting the PLC signal into the analog signal is further improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of signal conversion controllers, and in particular to a PLC signal conversion analog signal control circuit and a dimming controller. Background Art

[0002] With the rapid development of smart home control systems, power line communication (PLC) technology has been widely adopted in the control of various smart devices due to its significant advantages, including high reliability, stable signal transmission, and low cost. PLC technology modulates data signals onto a high-frequency carrier and transmits them via power lines, enabling remote information transmission and control. In smart home control systems, PLC technology has become a key means of connecting and controlling various smart devices due to its advantages, such as no need for additional wiring, wide coverage, and flexibility.

[0003] However, in real-world applications, PLC signal types often mismatch those required by smart devices. For example, PLC systems typically transmit 12-56MHz differential signals, while smart dimming and color-adjusting lamps require 0-10V analog voltage signals for control. This signal mismatch prevents PLC technology from being directly applied to the control of certain smart devices, limiting the flexibility and universality of smart home control systems. Utility Model Content

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a PLC signal conversion analog signal control circuit and a dimming controller with high flexibility and universality.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A PLC signal conversion analog signal control circuit comprises a rectification conversion circuit, a switch control circuit, a PLC coupling circuit, an analysis module and an analog signal control circuit.

[0007] The input end of the rectifier conversion circuit is used to access the mains power, and the rectifier conversion circuit provides operating voltage for the switch control circuit, the analysis module and the analog signal control circuit.

[0008] The switch control circuit is used to receive the control signal output by the analysis module to control the on and off of the mains power.

[0009] The PLC coupling circuit includes a surge protection diode and an isolation coupler, the input end of the isolation coupler is connected to the input end of the rectifier conversion circuit, the output end of the isolation coupler is connected in parallel with the surge protection diode, and the two ends of the surge protection diode are respectively connected to the input end of the analysis module.

[0010] The PLC positive input terminal of the analysis module is connected to the first end of the surge protection diode, and the PLC negative input terminal of the analysis module is connected to the second end of the surge protection diode. The analog signal control circuit includes a cold light control chip and a warm light control chip. The cold light signal output terminal of the analysis module is connected to the cold light PWM signal receiving terminal of the cold light control chip, and the warm light signal output terminal of the analysis module is connected to the warm light PWM signal receiving terminal of the warm light control chip. The switch signal control terminal of the analysis module is connected to the control terminal of the switch control circuit.

[0011] In one embodiment, the analysis module further includes a first current limiting resistor, wherein a first end of the first current limiting resistor is connected to a first end of the surge protection diode, and a second end of the first current limiting resistor is connected to a negative input terminal of the PLC of the analysis module.

[0012] In one embodiment, the analysis module further includes a second current limiting resistor, a first end of the second current limiting resistor is connected to the second end of the surge protection diode, and a second end of the second current limiting resistor is connected to the PLC positive input terminal of the analysis module.

[0013] In one embodiment, the analysis module further includes a third current limiting resistor, a first end of the third current limiting resistor is connected to the cold light PWM signal receiving end of the cold light control chip, and a second end of the third current limiting resistor is connected to the cold light signal output end of the analysis module.

[0014] In one embodiment, the analysis module further includes a fourth current limiting resistor, a first end of the fourth current limiting resistor is connected to the warm light PWM signal receiving end of the warm light control chip, and a second end of the fourth current limiting resistor is connected to the warm light signal output end of the analysis module.

[0015] In one embodiment, the PLC coupling circuit further includes a first anti-static diode and a second anti-static diode, wherein the first end of the first anti-static diode is connected to the PLC positive input end of the analysis module, the first end of the second anti-static diode is connected to the PLC negative input end of the analysis module, and the second end of the first anti-static diode and the second end of the second anti-static diode are grounded.

[0016] In one embodiment, the switch control circuit includes a first electronic switch tube and a switch relay, the contact input end of the switch relay is used to connect to the mains input end, the contact output end of the switch relay is used to connect to the load, the power supply end of the switch relay is connected to the output end of the rectifier conversion circuit, the first end of the first electronic switch tube is connected to the control end of the switch relay, the control end of the first electronic switch tube is connected to the switch signal control end of the analysis module, and the second end of the first electronic switch tube is grounded.

[0017] In one embodiment, the switch control circuit also includes a first voltage-dividing resistor, a second voltage-dividing resistor and a freewheeling diode, the first end of the first voltage-dividing resistor is connected to the output end of the rectifier conversion circuit, the anode of the freewheeling diode is connected to the first end of the first electronic switch tube, the cathode of the freewheeling diode is connected to the second end of the first voltage-dividing resistor, the second end of the first voltage-dividing resistor is connected to the power supply end of the switching relay, the first end of the second voltage-dividing resistor is connected to the control end of the first electronic switch tube, and the second end of the second voltage-dividing resistor is grounded.

[0018] In one embodiment, the analog signal control circuit further includes a first filter capacitor and a second filter capacitor, the first end of the first filter capacitor is connected to the output end of the cold light control chip, the first end of the second filter capacitor is connected to the output end of the warm light control chip, and the second end of the first filter capacitor and the second end of the second filter capacitor are grounded.

[0019] A dimming controller comprises the PLC signal conversion analog signal control circuit as described in any one of the above items.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] 1. The above-mentioned PLC signal conversion analog signal control circuit couples the power line carrier communication signal to the analysis module through the PLC coupling circuit, and then transmits the analog signal after analysis and conversion to the analog signal control circuit, and then the warm light control chip and the cold light control chip output the corresponding analog signal and transmit it to the lamp light source, thereby realizing precise control of the dimming and color adjustment of the smart lamp, and solving the problem of mismatch between the power line carrier communication signal and the signal required by the smart dimming and color adjustment lamp, so that the smart dimming and color adjustment lamp can respond to the control command from the power line carrier communication signal, thereby realizing flexible adjustment of the brightness and color temperature of the lamp without additional wiring, and improving the flexibility and universality of the PLC signal conversion analog signal control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A circuit diagram of a PLC signal conversion analog signal control circuit according to an embodiment;

[0024] Figure 2 for Figure 1 The circuit diagram of the switch control circuit shown;

[0025] Figure 3 for Figure 1 The circuit diagram of the PLC coupling circuit and the analytical module shown;

[0026] Figure 4 for Figure 1 The circuit diagram of the analog signal control circuit is shown. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0031] like Figures 1 to 4 As shown, a PLC signal conversion analog signal control circuit 10 according to an embodiment of the present disclosure includes a rectification and conversion circuit 100 , a switch control circuit 200 , a PLC coupling circuit 300 , an analysis module 400 and an analog signal control circuit 500 .

[0032] The input end of the rectifier and converter circuit 100 is used to access the mains power. The rectifier and converter circuit 100 provides operating voltage for the switch control circuit 200 , the analysis module 400 and the analog signal control circuit 500 .

[0033] The switch control circuit 200 is used to receive the control signal output by the analysis module 400 to control the on and off of the mains power.

[0034] The PLC coupling circuit 300 includes a surge protection diode TVS1 and an isolation coupler T1. The input end of the isolation coupler T1 is connected to the input end of the rectifier conversion circuit 100, and the output end of the isolation coupler T1 is connected in parallel with the surge protection diode TVS1. Specifically, the non-inverting end of the secondary side of the isolation coupler T1 is connected to the first end of the surge protection diode TVS1, and the inverting end of the secondary side of the isolation coupler T1 is connected to the second end of the surge protection diode TVS1. The two ends of the surge protection diode TVS1 are respectively connected to the analysis module 400.

[0035] The PLC positive input terminal of the analysis module is connected to the first end of the surge protection diode, the PLC negative input terminal of the analysis module is connected to the second end of the surge protection diode, the analog signal control circuit includes a cold light control chip and a warm light control chip, the cold light signal output terminal of the analysis module is connected to the cold light PWM signal receiving terminal of the cold light control chip, the warm light signal output terminal of the analysis module is connected to the warm light PWM signal receiving terminal of the warm light control chip, and the switch signal control terminal of the analysis module is connected to the control terminal of the switch control circuit.

[0036] In this embodiment, after the industrial frequency AC power is connected to the rectification and conversion circuit 100, the rectification and conversion circuit 100 converts the 220V AC power into 15V DC power, and provides a stable DC power supply for the analysis module 400, the switch control circuit 200 and the analog signal control circuit 500. The power line carrier communication signal in the circuit is passed into the input end of the isolation coupler T1 and is transmitted to the surge protection diode TVS1 through the output end of the isolation coupler T1. Then the surge protection diode TVS1 transmits the power line carrier communication signal to the analysis module microcontroller U1. At this time, the analysis module microcontroller U1 identifies and analyzes the power line carrier communication signal, and then outputs a corresponding control signal based on the analysis result. Among them, the switch signal control terminal K of the analysis module microcontroller U1 can output a level signal to the control terminal of the switch control circuit 200 to control the on and off of the mains power. At the same time, after the analysis module microcontroller U1 identifies and analyzes the control signal in the power line carrier communication signal, it outputs a PWM signal to the warm light PWM signal receiving terminal of the warm light control chip U2 and the cold light PWM signal receiving terminal of the cold light control chip U3 through the warm light signal output terminal W and the cold light signal output terminal C of the analysis module microcontroller U1, respectively, so that the warm light control chip U2 and the cold light control chip U3 respectively output corresponding analog signals to the warm light source and the cold light source, thereby causing the warm light source and the cold light source to output warm white light and cold white light of different color temperatures respectively, so that the warm light control chip U2 and the cold light control chip U3 can respectively adjust the brightness and color temperature of the lamp according to the changes in the control signal analyzed and converted by the analysis module microcontroller U1.

[0037] The above-mentioned PLC signal conversion analog signal control circuit 10 couples the power line carrier communication signal to the analysis module 400 through the PLC coupling circuit 300, and then transmits the control signal after analysis and conversion to the analog signal control circuit 500, and then the warm light control chip U2 and the cold light control chip U3 output the corresponding analog signal and transmit it to the lamp light source, thereby realizing precise control of the dimming and color adjustment of the smart lamp, and solving the problem of mismatch between the power line carrier communication signal and the signal required by the smart dimming and color adjustment lamp, so that the smart dimming and color adjustment lamp can respond to the control instructions from the power line carrier communication signal, thereby realizing flexible adjustment of the brightness and color temperature of the lamp without the need for additional wiring, and improving the flexibility and universality of the PLC signal conversion analog signal control circuit 10.

[0038] like Figure 3As shown, in one embodiment, the analysis module 400 further includes a first current-limiting resistor R1, wherein a first end of the first current-limiting resistor R1 is connected to a first end of a surge protection diode TVS1, and a second end of the first current-limiting resistor R1 is connected to a negative PLC input terminal PLC- of the analysis module microcontroller U1. In this embodiment, the primary function of the first current-limiting resistor R1 is to limit the magnitude of the current and protect the analysis module microcontroller U1 from the impact of excessive current. Specifically, when the power line carrier communication signal is transmitted to the analysis module microcontroller U1 through the surge protection diode TVS1, since the power line carrier communication signal may contain transient high voltage or high current components, the series connection of the first current-limiting resistor R1 can effectively reduce the current flowing through the negative PLC input terminal PLC- of the analysis module microcontroller U1, so that the current remains within the range that the analysis module microcontroller U1 can withstand, thereby improving the reliability and stability of the PLC signal conversion analog signal control circuit 10.

[0039] like Figure 3 As shown, in one embodiment, the analysis module 400 further includes a second current-limiting resistor R2, wherein a first end of the second current-limiting resistor R2 is connected to a second end of a surge protection diode TVS1, and a second end of the second current-limiting resistor R2 is connected to a positive PLC input terminal PLC+ of the analysis module microcontroller U1. In this embodiment, the primary function of the second current-limiting resistor R2 is to limit the magnitude of the current, thereby protecting the analysis module microcontroller U1 from the impact of excessive current. Specifically, when the power line carrier communication signal is transmitted to the analysis module microcontroller U1 through the surge protection diode TVS1, since the power line carrier communication signal may contain transient high voltage or high current components, the series connection of the second current-limiting resistor R2 can effectively reduce the current flowing through the positive PLC input terminal PLC+ of the analysis module microcontroller U1, thereby maintaining the current within the range that the analysis module microcontroller U1 can withstand, thereby improving the reliability and stability of the PLC signal conversion analog signal control circuit 10. In addition, the second current limiting resistor R2 can also play a certain filtering role, reduce noise interference in the signal, and improve the recognition accuracy and conversion accuracy of the power line carrier communication signal by the analysis module microcontroller U1.

[0040] like Figure 3As shown, in one embodiment, the analysis module 400 further includes a third current-limiting resistor R4. A first end of the third current-limiting resistor R4 is connected to the luminescent PWM signal receiving terminal of the luminescent control chip U3, and a second end of the third current-limiting resistor R4 is connected to the luminescent signal output terminal C of the analysis module microcontroller U1. In this embodiment, the third current-limiting resistor R4 primarily protects the luminescent control chip U3 from damage caused by excessively high levels or excessive currents in the PWM signals output by the analysis module microcontroller U1. Specifically, when the analysis module microcontroller U1 generates a corresponding luminescent PWM signal based on the control signal in the power line carrier communication signal and outputs it to the luminescent control chip U3 via the luminescent signal output terminal C, the third current-limiting resistor R4 effectively limits the current flowing into the luminescent PWM signal receiving terminal of the luminescent control chip U3, ensuring that the current remains within the safe operating range of the luminescent control chip U3. This effectively prevents damage to the luminescent control chip U3 due to overcurrent, thereby improving the stability of the PLC signal conversion analog signal control circuit 10.

[0041] like Figure 3 As shown, in one embodiment, the analysis module 400 further includes a fourth current-limiting resistor R5. A first end of the fourth current-limiting resistor R5 is connected to the warm light PWM signal receiving terminal of the warm light control chip U2, and a second end of the fourth current-limiting resistor R5 is connected to the warm light signal output terminal W of the analysis module microcontroller U1. In this embodiment, the main function of the fourth current-limiting resistor R5 is to protect the warm light control chip U2 by preventing damage to the warm light control chip U2 due to excessively high levels or excessive currents of the PWM signals output by the analysis module microcontroller U1. Specifically, when the analysis module microcontroller U1 generates a corresponding warm light PWM signal based on the control signal in the power line carrier communication signal and outputs it to the warm light control chip U2 through the warm light signal output terminal W, the fourth current-limiting resistor R5 can effectively limit the current flowing into the warm light PWM signal receiving terminal of the warm light control chip U2 and ensure that the current is within the safe operating range of the warm light control chip U2, thereby effectively preventing damage to the warm light control chip U2 due to overcurrent, thereby improving the stability of the PLC signal conversion analog signal control circuit 10.

[0042] like Figure 3As shown, in one embodiment, the PLC coupling circuit 300 further includes a first anti-static diode D2 and a second anti-static diode D1. The first end of the first anti-static diode D2 is connected to the PLC positive input terminal PLC+ of the analysis module microcontroller U1, and the first end of the second anti-static diode D1 is connected to the PLC negative input terminal PLC- of the analysis module microcontroller U1. The second end of the first anti-static diode D2 and the second end of the second anti-static diode D1 are grounded. In this embodiment, the main function of the first anti-static diode D2 and the second anti-static diode D1 is to prevent electrostatic discharge from damaging the analysis module microcontroller U1. Specifically, when external static electricity passes through the PLC coupling circuit 300, the first anti-static diode D2 and the second anti-static diode D1 will quickly turn on, directing the electrostatic charge to the ground line, thereby preventing the electrostatic charge from directly impacting the PLC positive input terminal PLC+ and the PLC negative input terminal PLC- of the analysis module microcontroller U1. This can effectively protect the analysis module microcontroller U1 from damage caused by electrostatic discharge and improve the reliability of the PLC signal conversion analog signal control circuit 10.

[0043] like Figure 2 As shown, in one embodiment, the switch control circuit 200 includes a first electronic switch Q1 and a switch relay SW1. The contact input terminal of the switch relay SW1 is connected to the mains input terminal, the contact output terminal of the switch relay SW1 is connected to the load, and the power supply terminal of the switch relay SW1 is connected to the output terminal of the rectifier and converter circuit 100. The first terminal of the first electronic switch Q1 is connected to the control terminal of the switch relay SW1, which is connected to the switch signal control terminal K of the analysis module microcontroller U1. The second terminal of the first electronic switch Q1 is grounded. In this embodiment, when the switch signal control terminal K of the analysis module microcontroller U1 outputs a high-level signal to the control terminal of the first electronic switch Q1, the voltage at the control terminal of the first electronic switch Q1 exceeds its threshold voltage, causing the first electronic switch Q1 to be triggered to turn on. Specifically, when the first electronic switch Q1 turns on, it provides a current control signal to the drive circuit of the switch relay SW1, causing the contacts of the switch relay SW1 to close, thereby enabling the mains input terminal to transmit electrical energy to the lamp load. When the switch signal control terminal K of the analysis module microcontroller U1 outputs a low-level signal or stops outputting a high-level signal, the first electronic switch tube Q1 will be cut off, so that the conductive path is disconnected and the switch relay SW1 loses power, thereby cutting off the power supply to the subsequent circuit, thereby achieving precise control of the mains power on and off.

[0044] In another embodiment, the switch relay SW1 is an electromagnet relay switch. When the first electronic switch tube Q1 is turned on, the electromagnet in the switch relay SW1 is energized, so that the magnetic switch in the switch relay SW1 is closed, thereby enabling the AC input end to transmit electrical energy to the lamp load; when the first electronic switch tube Q1 is turned off, the electromagnet in the switch relay SW1 loses power, thereby disconnecting the magnetic switch in the switch relay SW1, and further preventing the AC input end from transmitting electrical energy to the lamp load.

[0045] like Figure 4 As shown, in one embodiment, the switch control circuit 200 also includes a first voltage-dividing resistor R6, a second voltage-dividing resistor R7, and a freewheeling diode D3. The first end of the first voltage-dividing resistor R6 is connected to the output end of the rectifier conversion circuit 100, the anode of the freewheeling diode D3 is connected to the first end of the first electronic switch tube Q1, and the cathode of the freewheeling diode D3 is connected to the second end of the first voltage-dividing resistor R6. The second end of the first voltage-dividing resistor R6 is connected to the power supply end of the switch relay SW1. The first end of the second voltage-dividing resistor R7 is connected to the control end of the first electronic switch tube Q1, and the second end of the second voltage-dividing resistor R7 is grounded. In this embodiment, the main functions of the first voltage-dividing resistor R6 and the second voltage-dividing resistor R7 are voltage division and current limiting to ensure that the switch control circuit 200 can operate stably. Specifically, after the DC voltage output by the rectifier conversion circuit 100 passes through the first voltage-dividing resistor R6, due to the voltage-dividing effect of the series resistor, the power supply end of the switch relay SW1 obtains a stable voltage, thereby ensuring that the switch relay SW1 can operate normally. The function of the freewheeling diode D3 is to provide a current discharge path for the coil of the switching relay SW1 when the switching relay SW1 is turned off, thereby preventing the back electromotive force generated in the coil from damaging the first electronic switch Q1. The second voltage divider resistor R7 acts as a voltage divider in the circuit to ensure that the control terminal of the switch control circuit 200 outputs a stable level signal to the control terminal of the first electronic switch Q1, thereby improving the stability of the switch control circuit 200.

[0046] like Figure 4As shown, in one embodiment, the analog signal control circuit 500 further includes a first filter capacitor C8 and a second filter capacitor C7. The first end of the first filter capacitor C8 is connected to the output end of the cold light control chip U3, the first end of the second filter capacitor C7 is connected to the output end of the warm light control chip U2, and the second end of the first filter capacitor C8 and the second end of the second filter capacitor C7 are grounded. In this embodiment, the main function of the first filter capacitor C8 and the second filter capacitor C7 is to filter out high-frequency noise and clutter in the analog signal and improve the stability of the analog signal. Specifically, when the cold light control chip U3 and the warm light control chip U2 output corresponding analog voltages according to the control signal converted by the analysis module microcontroller U1, the analog voltage signal may contain some high-frequency noise and clutter components. By connecting the first filter capacitor C8 to the output end of the cold light control chip U3 and connecting the second filter capacitor C7 to the output end of the warm light control chip U2, these high-frequency noise and clutter can be effectively filtered out, so that the first filter capacitor C8 and the second filter capacitor C7 can absorb and store the energy of the high-frequency noise and clutter and guide it to the ground end, thereby preventing the noise and clutter from affecting the stable operation of the light source.

[0047] like Figure 4 As shown, in one embodiment, the analog signal control circuit 500 further includes a first clamping diode D5 and a second clamping diode D4. The first end of the first clamping diode D5 is connected to the output end of the cold light control chip U3, and the first end of the second clamping diode D4 is connected to the output end of the warm light control chip U2. The second ends of the first clamping diode D5 and the second clamping diode D4 are grounded. In this embodiment, the primary function of the first clamping diode D5 and the second clamping diode D4 is to ensure that the output voltage of the analog signal control circuit 500 does not exceed a predetermined safety range, thereby preventing damage to the cold light and warm light sources from excessive voltage. Specifically, if the output voltage of the cold light control chip U3 or the warm light control chip U2 abnormally rises when outputting analog signals, the first clamping diode D5 and the second clamping diode D4 will conduct to prevent further voltage increases from damaging the cold light and warm light sources, thereby ensuring the normal operation of the cold light and warm light sources and preventing damage from excessive voltage.

[0048] A dimming controller includes a PLC signal conversion analog signal control circuit 10 as described above. In this embodiment, after the industrial frequency AC power is connected to the rectifier conversion circuit 100, the rectifier conversion circuit 100 converts the 220V AC power into 15V DC power and provides a stable DC power supply for the analysis module 400, the switch control circuit 200, and the analog signal control circuit 500. The power line carrier communication signal in the circuit is passed to the input end of the isolation coupler T1 and is transmitted to the surge protection diode TVS1 through the output end of the isolation coupler T1. The surge protection diode TVS1 then transmits the power line carrier communication signal to the analysis module microcontroller U1. At this time, the analysis module microcontroller U1 identifies and analyzes the power line carrier communication signal, and then outputs a corresponding control signal based on the analysis result. Among them, the switch signal control terminal K of the analysis module microcontroller U1 can output a level signal to the control terminal of the switch control circuit 200 to control the on and off of the mains power. At the same time, after the analysis module microcontroller U1 identifies and analyzes the control signal in the power line carrier communication signal, it outputs a PWM signal to the warm light PWM signal receiving terminal of the warm light control chip U2 and the cold light PWM signal receiving terminal of the cold light control chip U3 through the warm light signal output terminal W and the cold light signal output terminal C of the analysis module microcontroller U1, respectively, so that the warm light control chip U2 and the cold light control chip U3 respectively output corresponding analog signals to the warm light source and the cold light source, thereby causing the warm light source and the cold light source to output warm white light and cold white light of different color temperatures respectively, so that the warm light control chip U2 and the cold light control chip U3 can respectively adjust the brightness and color temperature of the lamp according to the changes in the control signal analyzed and converted by the analysis module microcontroller U1.

[0049] Compared with the prior art, the present disclosure has at least the following advantages:

[0050] 1. The above-mentioned PLC signal conversion analog signal control circuit 10 couples the power line carrier communication signal to the analysis module 400 through the PLC coupling circuit 300, and then transmits the analog signal after analysis and conversion to the analog signal control circuit 500, and then the warm light control chip U2 and the cold light control chip U3 output the corresponding analog signal and transmit it to the lamp light source, thereby realizing precise control of the dimming and color adjustment of the smart lamp, and solving the problem of mismatch between the power line carrier communication signal and the signal required by the smart dimming and color adjustment lamp, so that the smart dimming and color adjustment lamp can respond to the control instructions from the power line carrier communication signal, thereby realizing flexible adjustment of the brightness and color temperature of the lamp without additional wiring, and improving the flexibility and universality of the PLC signal conversion analog signal control circuit 10.

[0051] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A PLC signal conversion analog signal control circuit, characterized in that: Including rectification conversion circuit, switch control circuit, PLC coupling circuit, analysis module and analog signal control circuit, The input end of the rectifier conversion circuit is used to access the mains power, and the rectifier conversion circuit provides operating voltage for the switch control circuit, the analysis module and the analog signal control circuit; The switch control circuit is used to receive the control signal output by the analysis module to control the on and off of the mains power; The PLC coupling circuit includes a surge protection diode and an isolation coupler, the input end of the isolation coupler is connected to the input end of the rectifier conversion circuit, the output end of the isolation coupler is connected in parallel with the surge protection diode, and the two ends of the surge protection diode are respectively connected to the input end of the analysis module; The PLC positive input terminal of the analysis module is connected to the first end of the surge protection diode, and the PLC negative input terminal of the analysis module is connected to the second end of the surge protection diode. The analog signal control circuit includes a cold light control chip and a warm light control chip. The cold light signal output terminal of the analysis module is connected to the cold light PWM signal receiving terminal of the cold light control chip, and the warm light signal output terminal of the analysis module is connected to the warm light PWM signal receiving terminal of the warm light control chip. The switch signal control terminal of the analysis module is connected to the control terminal of the switch control circuit.

2. The PLC signal conversion analog signal control circuit according to claim 1, characterized in that: The analysis module further includes a first current limiting resistor, wherein a first end of the first current limiting resistor is connected to a first end of the surge protection diode, and a second end of the first current limiting resistor is connected to a negative input terminal of the PLC of the analysis module.

3. The PLC signal conversion analog signal control circuit according to claim 2, characterized in that: The analysis module further includes a second current limiting resistor, a first end of the second current limiting resistor is connected to the second end of the surge protection diode, and a second end of the second current limiting resistor is connected to the PLC positive input end of the analysis module.

4. The PLC signal conversion analog signal control circuit according to claim 2, characterized in that: The analysis module further includes a third current limiting resistor, a first end of the third current limiting resistor is connected to the luminescent PWM signal receiving end of the luminescent control chip, and a second end of the third current limiting resistor is connected to the luminescent signal output end of the analysis module.

5. The PLC signal conversion analog signal control circuit according to claim 2, characterized in that: The analysis module further includes a fourth current limiting resistor, a first end of the fourth current limiting resistor is connected to the warm light PWM signal receiving end of the warm light control chip, and a second end of the fourth current limiting resistor is connected to the warm light signal output end of the analysis module.

6. The PLC signal conversion analog signal control circuit according to claim 1, characterized in that: The PLC coupling circuit also includes a first anti-static diode and a second anti-static diode, the first end of the first anti-static diode is connected to the PLC positive input terminal of the analysis module, the first end of the second anti-static diode is connected to the PLC negative input terminal of the analysis module, and the second end of the first anti-static diode and the second end of the second anti-static diode are grounded.

7. The PLC signal conversion analog signal control circuit according to claim 1, characterized in that: The switch control circuit includes a first electronic switch tube and a switch relay, wherein the contact input end of the switch relay is used to be connected to the mains input end, the contact output end of the switch relay is used to be connected to the load, the power supply end of the switch relay is connected to the output end of the rectifier conversion circuit, the first end of the first electronic switch tube is connected to the control end of the switch relay, the control end of the first electronic switch tube is connected to the switch signal control end of the analysis module, and the second end of the first electronic switch tube is grounded.

8. The PLC signal conversion analog signal control circuit according to claim 7, characterized in that: The switch control circuit also includes a first voltage-dividing resistor, a second voltage-dividing resistor and a freewheeling diode. The first end of the first voltage-dividing resistor is connected to the output end of the rectifier conversion circuit, the positive electrode of the freewheeling diode is connected to the first end of the first electronic switch tube, the cathode of the freewheeling diode is connected to the second end of the first voltage-dividing resistor, the second end of the first voltage-dividing resistor is connected to the power supply end of the switching relay, the first end of the second voltage-dividing resistor is connected to the control end of the first electronic switch tube, and the second end of the second voltage-dividing resistor is grounded.

9. The PLC signal conversion analog signal control circuit according to claim 1, characterized in that: The analog signal control circuit also includes a first filter capacitor and a second filter capacitor, the first end of the first filter capacitor is connected to the output end of the cold light control chip, the first end of the second filter capacitor is connected to the output end of the warm light control chip, and the second end of the first filter capacitor and the second end of the second filter capacitor are grounded.

10. A dimming controller, characterized in that: The invention comprises the PLC signal conversion analog signal control circuit as described in any one of claims 1 to 9 above.

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