CN219087357U - Signal conversion circuit, lamp controller and illumination control system - Google Patents
Signal conversion circuit, lamp controller and illumination control system Download PDFInfo
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- CN219087357U CN219087357U CN202222283645.3U CN202222283645U CN219087357U CN 219087357 U CN219087357 U CN 219087357U CN 202222283645 U CN202222283645 U CN 202222283645U CN 219087357 U CN219087357 U CN 219087357U
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Abstract
The utility model discloses a signal conversion circuit which comprises an integrating circuit, a signal feedback circuit, a comparison circuit, a level conversion circuit and an output circuit, wherein the integrating circuit is connected with the signal feedback circuit; the integrating circuit is used for converting the PWM signal into a direct current signal and outputting the direct current signal to the comparison circuit; the signal feedback circuit is used for outputting a feedback signal to the comparison circuit; the comparison circuit is used for outputting a current signal to the level conversion circuit according to the direct current signal and the feedback signal; the level conversion circuit is used for generating a feedback signal according to the current signal and outputting the feedback signal to the comparison circuit through the signal feedback circuit so as to adjust the current signal output by the comparison circuit, and is also used for converting the current signal into a voltage dimming signal and outputting the voltage dimming signal through the output circuit. The utility model also discloses a lamp controller and a lighting control system. The utility model can accurately convert the PWM signal into the voltage dimming signal, thereby solving the problem of long-distance transmission distortion of the PWM signal and the problem of the existing dimming equipment accessing an intelligent platform.
Description
Technical Field
The utility model relates to the technical field of LEDs, in particular to a signal conversion circuit, a lamp controller and an illumination control system.
Background
With the technological change, the intelligent lighting technology is developed at a high speed, and the intelligent lighting of the LEDs gradually becomes the main stream of green lighting. Accordingly, LEDs are far superior to conventional lighting products in technology, power consumption, energy conservation, and availability and environmental protection.
Most of LED lamps in the market belong to conventional series, are mainly used for illumination, and have single functions. However, with the penetration of lighting technology, there is an increasing demand for lighting functions; among them, LED lamps with dimming control function are increasingly popular.
Currently, the common dimming technologies in the market include PWM dimming, thyristor dimming and 0-10V/1-10V dimming. However, the PWM dimming technology has a distortion problem of long-distance signal transmission, and the 0-10V/1-10V dimming technology has a problem that the 0-10V dimming device is connected to the intelligent platform.
Therefore, the conversion of different dimming signals is needed in some scenes, which is beneficial to realizing the control of a corresponding lighting system and integrating the resources on the market, and increases the universality.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a signal conversion circuit, a lamp controller and a lighting control system, which can accurately convert PWM signals into voltage dimming signals.
In order to solve the above technical problems, the present utility model provides a signal conversion circuit, including: the device comprises an integrating circuit, a signal feedback circuit, a comparison circuit, a level conversion circuit and an output circuit; the input end of the integrating circuit is connected with a PWM signal, the output end of the integrating circuit is connected with the first input end of the comparison circuit, and the integrating circuit is used for converting the PWM signal into a direct current signal and outputting the direct current signal to the comparison circuit; the output end of the signal feedback circuit is connected with the second input end of the comparison circuit, and the signal feedback circuit is used for outputting a feedback signal to the comparison circuit; the output end of the comparison circuit is connected with the input end of the level conversion circuit, and the comparison circuit is used for outputting a current signal to the level conversion circuit according to the direct current signal and the feedback signal; the output end of the level conversion circuit is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit, the level conversion circuit is used for generating a feedback signal according to the current signal and outputting the feedback signal to the comparison circuit through the signal feedback circuit so as to adjust the current signal output by the comparison circuit, and the level conversion circuit is also used for converting the current signal into a voltage dimming signal and outputting the voltage dimming signal through the output circuit.
As an improvement of the scheme, the level conversion circuit comprises a first switching tube and a second switching tube; the triggering end of the first switching tube is connected with the output end of the comparison circuit, the first end of the first switching tube is connected with a power supply, and the second end of the first switching tube is connected with the triggering end of the second switching tube; the first end of the second switching tube is grounded, and the second end of the second switching tube is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit.
As an improvement of the scheme, the level conversion circuit comprises a first switching tube and a second switching tube; the second end of the first switching tube is connected with the output end of the comparison circuit and the power supply respectively, and the first end of the first switching tube is connected with the trigger end of the second switching tube; the first end of the second switching tube is grounded, and the second end of the second switching tube is respectively connected with the trigger end of the first switching tube, the input end of the signal feedback circuit and the input end of the output circuit.
As an improvement of the scheme, the level conversion circuit comprises a first switching tube and a second switching tube; the triggering end of the first switching tube is connected with the output end of the comparison circuit, the second end of the first switching tube is connected with a power supply, and the first end of the first switching tube is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit; the trigger end of the second switching tube is connected with the output end of the comparison circuit, the second end of the second switching tube is grounded, and the first end of the second switching tube is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit.
As an improvement of the above scheme, the comparison circuit includes an operational amplifier, a first input terminal of the operational amplifier is connected to an output terminal of the integrating circuit, a second input terminal of the operational amplifier is connected to an output terminal of the signal feedback circuit, and an output terminal of the operational amplifier is connected to an input terminal of the level conversion circuit.
As an improvement of the above scheme, the signal feedback circuit includes a resistor group, the resistor group includes at least one resistor, one end of the resistor group is connected with the output end of the level conversion circuit, and the other end of the resistor group is connected with the second input end of the comparison circuit.
As an improvement of the scheme, the integrating circuit comprises a second capacitor, a third capacitor, a seventh resistor and an eighth resistor, wherein one end of the eighth resistor is connected with the PWM signal through the seventh resistor and grounded through the third capacitor, and the other end of the eighth resistor is connected with the first input end of the comparison circuit and grounded through the second capacitor.
As an improvement of the scheme, the output circuit comprises a third resistor, a fifth resistor, a first capacitor and a voltage stabilizing diode, one end of the fifth resistor is connected with the output end of the level conversion circuit, and the other end of the fifth resistor is grounded through the first capacitor, grounded through the first voltage stabilizing diode and connected with a power supply through the third resistor.
Correspondingly, the utility model also provides a lamp controller which comprises a signal receiver, a signal analyzer and the signal conversion circuit, wherein the signal receiver, the signal analyzer and the signal conversion circuit are sequentially connected; the signal receiver is used for receiving a control signal and sending the control signal to the signal analyzer; the signal analyzer is used for analyzing the control signal to generate a PWM signal and sending the PWM signal to the signal conversion circuit; the signal conversion circuit is used for converting the PWM signal into a voltage dimming signal.
Correspondingly, the utility model also provides a lighting control system which comprises at least one group of LED modules and the lamp controller, wherein each group of LED modules comprises an LED dimming power supply and an LED light source module which are in one-to-one correspondence, and each LED light source module is connected with the lamp controller through the corresponding LED dimming power supply.
As an improvement of the above solution, the lighting control system further comprises a sensor and/or a light control system, which is connected to the light controller.
The implementation of the utility model has the following beneficial effects:
the utility model can convert the input PWM signal into any stable voltage value within the range of 0-10V through the signal conversion circuit, thereby solving the problem of long-distance transmission distortion of the PWM signal and simultaneously solving the problem that the traditional 0-10V dimming equipment is connected into an intelligent platform;
meanwhile, the output end of the signal feedback circuit is connected with the second input end of the comparison circuit, the output end of the comparison circuit is connected with the input end of the level conversion circuit, and the output end of the level conversion circuit is connected with the input end of the signal feedback circuit, so that a relatively stable closed-loop control system is formed among the signal feedback circuit, the comparison circuit and the level conversion circuit, closed-loop control of a voltage dimming signal can be realized, and the accuracy is high;
furthermore, the utility model can simultaneously connect a plurality of LED modules into the lighting control system, thereby being convenient for realizing the intellectualization of the dimming equipment; meanwhile, when a plurality of LED modules are connected, the circuit can also pull the low-end voltage to be very low, so that the turn-off control of the LED modules is realized.
Drawings
FIG. 1 is a schematic diagram of a signal conversion circuit according to the present utility model;
FIG. 2 is a circuit diagram of a first embodiment of the signal conversion circuit of the present utility model;
FIG. 3 is a circuit diagram of a second embodiment of the signal conversion circuit of the present utility model;
FIG. 4 is a circuit diagram of a third embodiment of the signal conversion circuit of the present utility model;
FIG. 5 is a schematic diagram of the structure of the lamp controller of the present utility model;
FIG. 6 is a schematic diagram of a first embodiment of the lighting control system of the present utility model;
fig. 7 is a schematic structural diagram of a second embodiment of the illumination control system of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
Referring to fig. 1, fig. 1 shows a specific structure of a signal conversion circuit of the present utility model, which includes an integrating circuit 1, a signal feedback circuit 2, a comparing circuit 3, a level conversion circuit 4, and an output circuit 5. Specifically:
the input end of the integrating circuit 1 is connected with a PWM signal, the output end of the integrating circuit 1 is connected with the first input end of the comparison circuit 3, and the integrating circuit 1 is used for converting the PWM signal into a stable direct current signal and outputting the direct current signal to the comparison circuit 3;
the output end of the signal feedback circuit 2 is connected with the second input end of the comparison circuit 3, and the signal feedback circuit 2 is used for outputting a feedback signal to the comparison circuit 3, so that the stable operation of the signal conversion circuit is ensured;
the output end of the comparison circuit 3 is connected with the input end of the level conversion circuit 4, and the comparison circuit 3 is used for outputting a current signal to the level conversion circuit 4 according to a direct current signal and a feedback signal;
the output end of the level conversion circuit 4 is respectively connected with the input end of the signal feedback circuit 2 and the input end of the output circuit 5; the level conversion circuit 4 is used for generating a feedback signal according to the current signal and outputting the feedback signal to the comparison circuit 3 through the signal feedback circuit 2 so as to adjust the current signal output by the comparison circuit 3; the level conversion circuit 4 is further used for converting the current signal into a voltage dimming signal and outputting the voltage dimming signal through the output circuit 5;
the output circuit 5 is used for providing stable voltage dimming signals, and effective protection of the signal conversion circuit is achieved.
During operation, the integrating circuit 1 converts an input PWM signal into a stable direct current signal and outputs the direct current signal to the comparison circuit 3; meanwhile, the signal feedback circuit 2 outputs a feedback signal to the comparison circuit 3; at this time, the comparison circuit 3 may output a current signal to the level shift circuit 4 according to the dc signal and the feedback signal; accordingly, the level conversion circuit 4 generates a feedback signal according to the current signal, and outputs the feedback signal to the comparison circuit 3 through the signal feedback circuit 2 to adjust the current signal output by the comparison circuit 3; meanwhile, the level conversion circuit 4 converts the current signal into a voltage dimming signal and outputs the voltage dimming signal through the output circuit, thereby providing a stable voltage dimming signal to the outside.
As can be seen from the above, in the present utility model, the output end of the signal feedback circuit 2 is connected to the second input end of the comparison circuit 3, the output end of the comparison circuit 3 is connected to the input end of the level conversion circuit 4, and the output end of the level conversion circuit 4 is connected to the input end of the signal feedback circuit 2, so that a relatively stable closed-loop control system is formed among the signal feedback circuit 2, the comparison circuit 3 and the level conversion circuit 4, which can realize closed-loop control of the voltage dimming signal with high accuracy.
It should be noted that, the voltage dimming signal is a 0-10V/1-10V voltage dimming signal, so that the signal conversion circuit of the utility model can convert the input PWM signal into any stable voltage value within the range of 0-10V, thereby solving the problem of long-distance transmission distortion of the PWM signal and solving the problem of accessing the existing 0-10V dimming device into the intelligent platform.
Referring to fig. 2, fig. 2 shows a first embodiment of the signal conversion circuit of the present utility model, and the integrating circuit 1, the signal feedback circuit 2, the comparing circuit 3, the level converting circuit 4 and the output circuit 5 are described in detail below with reference to specific circuit diagrams.
1. Integrating circuit
The integrating circuit 1 comprises a second capacitor C2, a third capacitor C3, a seventh resistor R7 and an eighth resistor R8, wherein one end of the eighth resistor R8 is connected with the PWM signal through the seventh resistor R7 and grounded through the third capacitor C3, and the other end of the eighth resistor R8 is connected with the first input end of the comparing circuit 3 and grounded through the second capacitor C2.
2. Signal feedback circuit
The signal feedback circuit 2 comprises a resistor group, wherein the resistor group comprises at least one resistor, one end of the resistor group is connected with the output end of the level conversion circuit 4, and the other end of the resistor group is connected with the second input end of the comparison circuit 3.
As shown in fig. 2, in the present embodiment, the resistor group includes a second resistor R2, one end of the second resistor R2 is connected to the output end of the level shifter circuit 3, and the other end of the second resistor R2 is connected to the second input end of the comparator circuit 3 and is grounded through a fourth resistor R4.
3. Comparison circuit
The comparison circuit 3 includes an operational amplifier U1, a first input end (i.e., a non-inverting input end) of the operational amplifier U1 is connected to an output end of the integration circuit 1, a second input end (i.e., an inverting input end) of the operational amplifier U1 is connected to an output end of the signal feedback circuit 2, and an output end of the operational amplifier U1 is connected to an input end of the level conversion circuit 4.
Further, the comparison circuit 3 further includes a sixth resistor R6, a ninth resistor R9, and a fourth capacitor C4, the output end of the operational amplifier U1 is connected to the input end of the level conversion circuit 4 through the sixth resistor R6, the ground of the operational amplifier U1 is grounded, and the power end of the operational amplifier U1 is grounded through the fourth capacitor C4 and is connected to the power supply through the ninth resistor R9; in this embodiment, the power supply voltage is +12v.
4. Level conversion circuit
The level conversion circuit 4 comprises a first switching tube Q1 and a second switching tube Q2; the triggering end of the first switching tube Q1 is connected with the output end of the comparison circuit 3, the first end of the first switching tube Q1 is connected with a power supply, and the second end of the first switching tube Q1 is connected with the triggering end of the second switching tube Q2; the first end of the second switching tube Q2 is grounded, and the second end of the second switching tube Q2 is respectively connected with the input end of the signal feedback circuit 2 and the input end of the output circuit 5.
It should be noted that the level shift circuit 4 may be composed of two different types of three-terminal semiconductor devices, in which an N-type three-terminal semiconductor is connected to the output circuit. In this embodiment, the first switching tube Q1 is preferably a PNP-type triode, the second switching tube Q2 is preferably an NPN-type triode, at this time, the trigger end of the first switching tube Q1 is the base of the PNP-type triode, the first end of the first switching tube Q1 is the emitter of the PNP-type triode, and the second end of the first switching tube Q1 is the collector of the PNP-type triode; in addition, the second switching tube Q2 is similar, and will not be described herein.
Further, the level shifter 4 further includes a first resistor R1 and a tenth resistor R10, the first end of the first switching tube Q1 is connected to the power supply through the first resistor R1, and the trigger end of the second switching tube Q2 is grounded through the tenth resistor R10. In this embodiment, the power supply voltage is +12v.
5. Output circuit
The output circuit 5 includes a third resistor R3, a fifth resistor R5, a first capacitor C1 and a zener diode ZD1, one end of the fifth resistor R5 is connected to the output end of the level conversion circuit 4, and the other end of the fifth resistor R5 is grounded through the first capacitor C1, grounded through the zener diode ZD1 and connected to a power supply through the third resistor R3.
Therefore, the output circuit 5 can effectively ensure the stability of the output level signal (i.e. the voltage dimming signal) and prevent the damage caused by the signal misconnection through the resistor component (i.e. the third resistor R3, the fifth resistor R5 and the first capacitor C1) and the semiconductor device (i.e. the zener diode ZD 1).
As can be seen from the above, when a certain amount of PWM signal is input into the integrating circuit 1 through the input end of the integrating circuit 1, the integrating circuit 1 integrates the PWM signal to form a dc signal; subsequently, the direct current signal is transmitted to the non-inverting input terminal of the operational amplifier U1, and at the same time, the signal feedback circuit 2 transmits the feedback signal to the inverting input terminal of the operational amplifier U1; at this time, the operational amplifier U1 generates a current signal from the dc signal and the feedback signal; since the output end of the operational amplifier U1 is connected to the input end of the level conversion circuit 4, the current signal output by the operational amplifier U1 can control the flux of the first switching tube Q1 in real time; correspondingly, the conducting flux of the first switching tube Q1 can effectively control the conducting flux of the second switching tube Q2; at this time, since the output terminal of the second switching tube Q2 is connected to the output circuit 5, the voltage value of the output terminal of the level conversion circuit 4 can be controlled to operate between 0V and 10V by the second switching tube Q2; meanwhile, as the output end of the second switching tube Q2 is connected to the signal feedback circuit 2, the conduction quantity of the second switching tube Q2 can control the current signal output by the operational amplifier U1 through the feedback circuit, so that a relatively stable closed-loop control system is formed, the conduction quantity of the first switching tube Q1 and the second switching tube Q2 is controlled again, and the stability of the output signal is realized.
Referring to fig. 3, fig. 3 shows a second embodiment of the signal conversion circuit of the present utility model, which is different from the first embodiment shown in fig. 2 in that in this embodiment, a second end of a first switching tube Q1 is connected to an output end of the comparison circuit 3 and is connected to a power source through a first resistor R1, and a first end of the first switching tube Q1 is connected to a trigger end of a second switching tube Q2; the first end of the second switching tube Q2 is grounded, the second end of the second switching tube Q2 is respectively connected with the trigger end of the first switching tube Q1, the input end of the signal feedback circuit 2 and the input end of the output circuit 5, and the trigger end of the second switching tube Q2 is grounded through a tenth resistor.
In this embodiment, the first switching transistor Q1 is preferably an NPN transistor, and the second switching transistor Q2 is preferably an NPN transistor.
Referring to fig. 4, fig. 4 shows a third embodiment of the signal conversion circuit of the present utility model, which is different from the first embodiment shown in fig. 2 in that in this embodiment, a trigger end of a first switching tube Q1 is connected to an output end of a comparison circuit 3, a second end of the first switching tube Q1 is connected to a power supply through a first resistor R1, and first ends of the first switching tube Q1 are respectively connected to an input end of a signal feedback circuit 2 and an input end of an output circuit 5; the trigger end of the second switching tube Q2 is connected with the output end of the comparison circuit 3, the second end of the second switching tube Q2 is grounded, and the first end of the second switching tube Q2 is respectively connected with the input end of the signal feedback circuit 2 and the input end of the output circuit 5; one end of the tenth resistor is connected with the output end of the comparison circuit 3, and the other end of the tenth resistor is connected with the first ends of the first switching tube Q1 and the second switching tube Q2.
In this embodiment, the first switching transistor Q1 is preferably an NPN transistor, and the second switching transistor Q2 is preferably a PNP transistor.
Referring to fig. 2-4, the present utility model controls the conduction amounts of the first switching tube Q1 and the second switching tube Q2, so as to control the voltage value at the output end of the level conversion circuit 4 to work between 0V and 10V, and controls the current signal output by the operational amplifier U1 through the feedback circuit, thereby forming a relatively stable closed loop control system, and controlling the conduction amounts of the first switching tube Q1 and the second switching tube Q2 again, so as to realize the stability of the output signal.
Referring to fig. 5, fig. 5 shows a specific structure of the light controller 100 according to the present utility model, which includes the signal receiver 10, the signal analyzer 20 and the signal conversion circuit 30, and the signal receiver 10, the signal analyzer 20 and the signal conversion circuit 30 are sequentially connected. Specifically:
the signal receiver 10 is configured to receive the control signal and send the control signal to the signal parser 20; preferably, the control signal may be a wireless control signal or a wired control signal sent by the console, but is not limited thereto, and may be adjusted according to practical situations.
The signal parser 20 is configured to parse the control signal to generate a PWM signal, and send the PWM signal to the signal conversion circuit 30;
the signal conversion circuit 30 is used for converting the PWM signal into a voltage dimming signal.
Referring to fig. 6, fig. 6 shows a first embodiment of the lighting control system according to the present utility model, which includes at least one group of LED modules 200 and the lamp controller 100, each group of LED modules 200 includes a LED dimming power supply 201 and a LED light source module 202, and each LED light source module 202 is connected to the lamp controller 100 through a corresponding LED dimming power supply 210.
It should be noted that, the light controller 10 may be connected to the 1-8 paths of the LED dimming power supply 201 and the LED light source module 202 at the same time, but not limited thereto, and may be adjusted according to practical situations.
Accordingly, a voltage dimming signal may be generated by the signal conversion circuit 30, thereby effectively adjusting an electrical parameter that adjusts the output of the LED dimming power supply 201.
Referring to fig. 7, fig. 7 shows a second embodiment of the lighting control system according to the present utility model, which differs from the first embodiment shown in fig. 6 in that the lighting control system further comprises a sensor 300 and a lamp control system 400, and the sensor 300 and the lamp control system 400 are connected to the lamp controller 100, respectively.
It should be noted that, the sensor 300 may be separately connected to the lighting control system, or the light control system 400 may be separately connected to the lighting control system, or both the sensor 300 and the light control system 400 may be connected to the lighting control system. Wherein, after the sensor 300 is accessed, the environment sensing function can be effectively realized; and other lamp control systems 400 are connected, so that the control quantity can be effectively expanded, and the functions of the illumination control system are improved.
In conclusion, the utility model can realize application requirement scenes such as spectrum regulation, illumination regulation, colored atmosphere illumination and the like, such as office illumination, animal and plant illumination, atmosphere illumination and the like. Specifically:
the utility model can accurately convert the duty ratio value of 0-100% of the PWM signal into any level value of 0-10V, thereby solving the problem that the traditional 0-10V dimming equipment is connected into an intelligent platform;
the utility model has strong driving capability, and when the signal output end is connected with a plurality of 0-10V LED modules, the low-end voltage can be pulled to be very low, so that the turn-off control of the LED modules is realized;
meanwhile, the utility model can conveniently realize intellectualization, so that the LED module with the voltage of 0-10V can be connected into other lamp control systems;
furthermore, the utility model can realize the long-distance transmission of multipath signals with little distortion.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.
Claims (11)
1. The signal conversion circuit is characterized by comprising an integrating circuit, a signal feedback circuit, a comparison circuit, a level conversion circuit and an output circuit;
the input end of the integrating circuit is connected with a PWM signal, the output end of the integrating circuit is connected with the first input end of the comparison circuit, and the integrating circuit is used for converting the PWM signal into a direct current signal and outputting the direct current signal to the comparison circuit;
the output end of the signal feedback circuit is connected with the second input end of the comparison circuit, and the signal feedback circuit is used for outputting a feedback signal to the comparison circuit;
the output end of the comparison circuit is connected with the input end of the level conversion circuit, and the comparison circuit is used for outputting a current signal to the level conversion circuit according to the direct current signal and the feedback signal;
the output end of the level conversion circuit is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit, the level conversion circuit is used for generating a feedback signal according to the current signal and outputting the feedback signal to the comparison circuit through the signal feedback circuit so as to adjust the current signal output by the comparison circuit, and the level conversion circuit is also used for converting the current signal into a voltage dimming signal and outputting the voltage dimming signal through the output circuit.
2. The signal conversion circuit of claim 1, wherein the level conversion circuit comprises a first switching tube and a second switching tube;
the triggering end of the first switching tube is connected with the output end of the comparison circuit, the first end of the first switching tube is connected with a power supply, and the second end of the first switching tube is connected with the triggering end of the second switching tube;
the first end of the second switching tube is grounded, and the second end of the second switching tube is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit.
3. The signal conversion circuit of claim 1, wherein the level conversion circuit comprises a first switching tube and a second switching tube;
the second end of the first switching tube is connected with the output end of the comparison circuit and the power supply respectively, and the first end of the first switching tube is connected with the trigger end of the second switching tube;
the first end of the second switching tube is grounded, and the second end of the second switching tube is respectively connected with the trigger end of the first switching tube, the input end of the signal feedback circuit and the input end of the output circuit.
4. The signal conversion circuit of claim 1, wherein the level conversion circuit comprises a first switching tube and a second switching tube;
the triggering end of the first switching tube is connected with the output end of the comparison circuit, the second end of the first switching tube is connected with a power supply, and the first end of the first switching tube is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit;
the trigger end of the second switching tube is connected with the output end of the comparison circuit, the second end of the second switching tube is grounded, and the first end of the second switching tube is respectively connected with the input end of the signal feedback circuit and the input end of the output circuit.
5. The signal conversion circuit of claim 1, wherein the comparison circuit comprises an operational amplifier, a first input of the operational amplifier is connected to an output of the integration circuit, a second input of the operational amplifier is connected to an output of the signal feedback circuit, and an output of the operational amplifier is connected to an input of the level conversion circuit.
6. The signal conversion circuit of claim 1, wherein the signal feedback circuit comprises a resistor group including at least one resistor, one end of the resistor group being connected to the output of the level conversion circuit, the other end of the resistor group being connected to the second input of the comparison circuit.
7. The signal conversion circuit according to claim 1, wherein the integrating circuit comprises a second capacitor, a third capacitor, a seventh resistor and an eighth resistor, one end of the eighth resistor is connected to the PWM signal through the seventh resistor and grounded through the third capacitor, and the other end of the eighth resistor is connected to the first input end of the comparing circuit and grounded through the second capacitor.
8. The signal conversion circuit according to claim 1, wherein the output circuit comprises a third resistor, a fifth resistor, a first capacitor and a zener diode, wherein one end of the fifth resistor is connected to the output end of the level conversion circuit, and the other end of the fifth resistor is grounded through the first capacitor, grounded through the zener diode and connected to a power supply through the third resistor.
9. A lamp controller, comprising a signal receiver, a signal analyzer and the signal conversion circuit of any one of claims 1-8, wherein the signal receiver, the signal analyzer and the signal conversion circuit are connected in sequence;
the signal receiver is used for receiving a control signal and sending the control signal to the signal analyzer;
the signal analyzer is used for analyzing the control signal to generate a PWM signal and sending the PWM signal to the signal conversion circuit;
the signal conversion circuit is used for converting the PWM signal into a voltage dimming signal.
10. An illumination control system, comprising at least one group of LED modules and the light controller of claim 9, wherein each group of LED modules comprises a LED dimming power supply and LED light source modules in one-to-one correspondence, and each LED light source module is connected with the light controller through a corresponding LED dimming power supply.
11. The lighting control system of claim 10, further comprising a sensor and/or a light control system, the sensor and/or light control system being coupled to the light controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222283645.3U CN219087357U (en) | 2022-08-29 | 2022-08-29 | Signal conversion circuit, lamp controller and illumination control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222283645.3U CN219087357U (en) | 2022-08-29 | 2022-08-29 | Signal conversion circuit, lamp controller and illumination control system |
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| CN219087357U true CN219087357U (en) | 2023-05-26 |
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| CN202222283645.3U Active CN219087357U (en) | 2022-08-29 | 2022-08-29 | Signal conversion circuit, lamp controller and illumination control system |
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| Country | Link |
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| CN (1) | CN219087357U (en) |
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2022
- 2022-08-29 CN CN202222283645.3U patent/CN219087357U/en active Active
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