CN213462421U - Dimming circuit and lamp - Google Patents
Dimming circuit and lamp Download PDFInfo
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- CN213462421U CN213462421U CN202021968747.3U CN202021968747U CN213462421U CN 213462421 U CN213462421 U CN 213462421U CN 202021968747 U CN202021968747 U CN 202021968747U CN 213462421 U CN213462421 U CN 213462421U
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Abstract
The application relates to a dimming circuit and lamps and lanterns, wherein dimming circuit includes: the conditioning sampling circuit receives the dimming signal output by the dimmer and outputs the conditioned dimming signal to the signal processing circuit; outputting the probe signal to a probe signal transmission circuit, and transmitting the dimming data to a signal processing circuit of the communication circuit; injecting a probe signal into the probe signal transmission circuit of the dimmer; the communication circuit receives the dimming signal and uploads the dimming signal to the main controller; the signal processing circuit is connected with the conditioning sampling circuit, the probe signal transmission circuit and the communication circuit, the conditioning sampling circuit and the probe signal transmission circuit are used for being connected with the light modulator, and the communication circuit is used for being connected with the main controller. According to the dimming circuit, the signal processing circuit can judge whether the dimmer fails according to the received feedback signal and the conditioned dimming signal, and dimming data are transmitted to the main controller through the communication circuit under the condition that the dimmer fails, so that the reliability of the dimming circuit is improved.
Description
Technical Field
The application relates to the technical field of dimming, in particular to a dimming circuit and a lamp.
Background
The lamp is applied to the aspects of our life, and the lamp cannot be used in the aspects of household life, road illumination, greenhouse planting and the like. The lamp has a dimming function through the dimming circuit, light brightness can be influenced through adjusting lamplight brightness, different environment atmospheres can be set off, the requirements of different application occasions can be met, and the dimming circuit is an important means for saving energy and reducing emission in the use process of the lamp.
According to the traditional dimming circuit, a direct current dimmer is directly connected with a lamp, and the lamp controls the light brightness according to a voltage signal input by the direct current dimmer, so that the dimming function is realized. However, during the operation of the dimming circuit, it is impossible to detect whether the dc dimmer fails, and dimming operation is performed according to a signal sent by the dc dimmer in case of the failure, which results in mismatching of the brightness of the lamp light with the actual requirement. The traditional dimming circuit has the defect of low control reliability.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a dimming circuit and a lamp, which solve the problem that the existing dimming circuit is not intelligent enough.
In a first aspect, the present application provides a dimming circuit comprising:
the conditioning sampling circuit receives the dimming signal output by the dimmer and outputs the conditioned dimming signal to the signal processing circuit;
outputting a probe signal to a probe signal transmission circuit, and transmitting dimming data to the signal processing circuit of the communication circuit;
injecting a probe signal to the probe signal transmission circuit of the dimmer;
the communication circuit receives the dimming signal and uploads the dimming signal to the main controller;
the signal processing circuit is connected with the conditioning sampling circuit, the probe signal transmission circuit and the communication circuit, the conditioning sampling circuit and the probe signal transmission circuit are used for connecting the light modulator, and the communication circuit is used for connecting the main controller.
In one embodiment, the method further comprises the following steps:
the power supply circuit receives a voltage signal output by the power supply and outputs a processed voltage signal to the signal processing circuit and the communication circuit; the power supply circuit is connected with the signal processing circuit and the communication circuit.
In one embodiment, the power supply circuit comprises a triode Q1 resistor R1 resistor R2, a controllable precision voltage regulator U1 voltage regulator resistor R3, a voltage regulator resistor R4 and a filter capacitor E1;
the collector of the triode Q1 is connected with the power supply through the resistor R1, the base of the triode Q1 is connected with the power supply through the resistor R2, and the emitter of the triode Q1 is connected with the voltage output end of the power supply circuit;
the cathode of the controllable precise voltage-stabilizing source U1 is connected with the base electrode of the triode Q1, the voltage-stabilizing resistor R3 is connected with the voltage-stabilizing resistor R4 in series, the reference electrode of the controllable precise voltage-stabilizing source U1 is connected with the common end formed by the voltage-stabilizing resistor R3 and the voltage-stabilizing resistor R4, and the anode of the controllable precise voltage-stabilizing source U1 is grounded;
the other end of the voltage-stabilizing resistor R3 is connected with an emitting electrode of the triode Q1, and the other end of the voltage-stabilizing resistor R4 is grounded;
one end of the filter capacitor E1 is grounded, and the other end of the filter capacitor E1 is connected with the emitting end of the triode Q1.
In one embodiment, the conditioning sampling circuit comprises a sampling interface, a filter capacitor C1, a diode D1, a diode D2, a filter capacitor C2, a signal conditioner and a filter capacitor C4;
the sampling interface comprises a first pin and a second pin, and the first pin and the second pin of the sampling interface are used for connecting the dimmer;
a first end and a second end of the filter capacitor C1 are respectively connected with a first pin and a second pin of the sampling interface;
the diode D1 is connected in series in reverse direction with the diode D2, a common terminal formed by a cathode of the diode D1 and a cathode of the diode D2 is connected with the first pin of the sampling interface, an anode of the diode D1 is connected with the probe signal transmission circuit, and an anode of the diode D2 is connected with the ground;
the filter capacitor C2 is connected in parallel with the diode D2;
the signal conditioner is connected with the second end of the filter capacitor C1 and the signal processing circuit, and is also connected with the anode of the diode D2;
one end of the filter capacitor C4 is connected with the common end of the signal conditioner and the signal processing circuit, and the other end of the filter capacitor C4 is grounded.
In one embodiment, the signal conditioner comprises a resistor R5, a resistor R6, a resistor R7 and a filter capacitor C3;
the resistor R5 is connected in series with the resistor R6, the common end of the resistor R5 is grounded through the resistor R7, the other end of the resistor R5 is connected with the second end of the filter capacitor C1, and the other end of the resistor R6 is connected with the signal processing circuit and the filter capacitor C4;
the filter capacitor C3 is connected in parallel with the resistor R7.
In one embodiment, the signal processing circuit comprises a first chip, a reset resistor R8, a filter capacitor C5 and a decoupling capacitor C6;
the signal acquisition end of the first chip is connected with the conditioning sampling circuit; the power supply end of the first chip is connected with the power supply circuit and is grounded through a decoupling capacitor C6; the probe signal output end of the first chip is connected with the probe signal transmission circuit; the signal output end of the first chip is connected with the communication circuit;
the reset resistor R8 and the filter capacitor C5 are connected in series, and a common end of the reset resistor R8 and the filter capacitor C5 is connected with a power-on reset end of the first chip; the other end of the reset resistor R8 is connected with the power supply circuit; the other end of the filter capacitor C5 is grounded.
In one embodiment, the first chip is a PIC12F510 chip.
In one embodiment, the probe signal transmission circuit comprises a transistor Q2, a resistor R9, a resistor R10, a transistor Q3, a resistor R11, a resistor R12 and a filter capacitor E2;
the base of the triode Q2 is connected with the signal processing circuit through the resistor R9, the collector of the triode Q2 is connected with the base of the triode Q3 through the resistor R11, the emitter of the triode Q2 is grounded, and the base of the triode Q2 is connected through the resistor R10;
the emitter of the transistor Q3 is connected with a power supply through the resistor R12, and the collector of the transistor Q3 is connected with the conditioning sampling circuit;
one end of the filter capacitor E2 is connected with a power supply, and the other end of the filter capacitor E2 is grounded.
In one embodiment, the communication circuit comprises a current limiting resistor R13, a current limiting resistor R14, a photoelectric coupler and a filter capacitor C7;
one end of the current-limiting resistor R13 is connected with the signal processing circuit, and the other end of the current-limiting resistor R13 is connected with the first end of the transmitting part of the photoelectric coupler; one end of the current-limiting resistor R14 is connected with the power supply circuit, and the other end of the current-limiting resistor R14 is connected with the second end of the transmitting part of the photoelectric coupler; the first end of the receiving part of the photoelectric coupler is connected with the main controller and is grounded through the filter capacitor C7, and the second end of the receiving part of the photoelectric coupler is grounded.
In a second aspect, the present application provides a luminaire comprising a dimmer, a master controller, a lighting lamp, and the dimming circuit of any of the above embodiments; the dimming circuit is connected with the dimmer and the main controller, and the main controller is connected with the illuminating lamp.
According to the dimming circuit, the probe signal output by the signal processing circuit is received through the probe signal transmission circuit, the probe signal is injected into the dimmer, the probe signal is fed back to the signal processing circuit through the conditioning sampling circuit, the signal processing circuit judges whether the dimmer fails according to the received feedback signal and the conditioned dimming signal, and dimming data are transmitted to the main controller through the communication circuit under the condition that the dimmer fails, so that the reliability of the dimming circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a dimming circuit according to an embodiment;
FIG. 2 is a block diagram of another embodiment of a dimming circuit;
fig. 3 is a schematic diagram of a dimming circuit according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
Referring to fig. 1, in one embodiment, the dimming circuit includes an conditioning sampling circuit 100, a signal processing circuit 200, a probe signal transmission circuit 300, and a communication circuit 400. The signal processing circuit 200 is connected to the conditioning sampling circuit 100, the probe signal transmission circuit 300 and the communication circuit 400, the conditioning sampling circuit 100 and the probe signal transmission circuit 300 are used for connecting to a dimmer, and the communication circuit 400 is used for connecting to a main controller. The conditioning sampling circuit 100 is configured to receive a dimming signal output by the dimmer and output the conditioned dimming signal to the signal processing circuit 200. The signal processing circuit 200 is used for outputting the probe signal to the probe signal transmitting circuit 300 and transmitting the dimming data to the communication circuit 400. The probe signal transmission circuit 300 is used to inject a probe signal into the dimmer. The communication circuit 400 is used for receiving the dimming data and uploading the dimming data to the main controller.
Specifically, the dimming signal output by the dimmer is processed by the conditioning sampling circuit 100, and then conditioned into the dimming signal conforming to the interface protocol of the signal processing circuit 200. Meanwhile, the signal processing circuit 200 outputs the probe signal to the probe signal transmitting circuit 300, and the probe signal is injected into the dimmer by the probe signal transmitting circuit 300. After passing through the dimmer, the probe signal is transmitted from the conditioning sampling circuit 100 to the signal processing circuit 200 together with the dimming signal. The dimming signal received by the signal processing circuit 200 is a superimposed signal of the feedback signal and the conditioned dimming signal. The signal processing circuit 200 converts the received dimming signal into a digital signal, and then sends the digital signal to the main controller through the communication circuit, and the main controller controls the light brightness of the lamp according to the signal.
In case of a failure of the dimmer, the dimming signal cannot be sent out, and the probe signal cannot be transmitted to the signal processing circuit 200 through the dimmer, at this time, the signal processing circuit 200 will send alarm information to the main controller. Specifically, the dimming signal and the feedback signal sent by the dimmer are both analog signals, and the value of the feedback signal is much smaller than the dimming signal, or the value of the feedback signal is a fixed value. Therefore, under the condition that the dimmer works normally, the dimming data finally reaching the main controller is still determined by the dimming signal sent by the dimmer.
Further, the signal processing circuit 200 may determine whether the probe signal needs to be transmitted according to the received dimming signal after receiving the dimming signal. In case that the received dimming signal is zero, the signal processing circuit 200 transmits the probe signal to the probe signal transmission circuit 300, and determines whether the dimmer is out of order through the feedback signal. When the received feedback signal is zero, judging that the dimmer has a fault, and sending alarm information to the main controller through the communication circuit 400; otherwise, the dimmer is judged to work normally, and the dimming data is output to the main controller through the communication circuit 400.
In the above embodiment, the probe signal output by the signal processing circuit is received through the probe signal transmission circuit, the probe signal is injected into the dimmer, the probe signal is fed back to the signal processing circuit through the conditioning sampling circuit, the signal processing circuit judges whether the dimmer fails according to the received feedback signal and the conditioned dimming signal, and the dimming data is transmitted to the main controller through the communication circuit under the condition that the dimmer fails, so that the reliability of the dimming circuit is improved.
In one embodiment, referring to fig. 2, the dimming circuit further includes a power supply circuit 500. The power supply circuit 500 is connected to the signal processing circuit 200 and the communication circuit 400. The power supply circuit 500 is configured to receive a voltage signal output by a power supply, and output the processed voltage signal to the signal processing circuit 200 and the communication circuit 400.
Specifically, after the voltage signal output by the power supply is processed by the power supply circuit 500, the processed voltage signal is output from the voltage output end out of the power supply circuit 500. The voltage output terminal out of the power supply circuit 500 is connected to the power supply terminals of the signal processing circuit 200 and the communication circuit 400, respectively, to provide the signal processing circuit 200 and the communication circuit 400 with operating voltages.
In one embodiment, referring to fig. 3, the power supply circuit 500 includes a transistor Q1, a resistor R1, a resistor R2, a controllable precision regulator U1, a regulator resistor R3, a regulator resistor R4, and a filter capacitor E1. The collector of the transistor Q1 is connected to the power supply through the resistor R1, the base of the transistor Q1 is connected to the power supply through the resistor R2, and the emitter of the transistor Q1 is connected to the voltage output terminal out of the power supply circuit 500. The cathode K of the controllable precise voltage-stabilizing source U1 is connected with the base electrode of the triode Q1, the voltage-stabilizing resistor R3 is connected with the voltage-stabilizing resistor R4 in series, the reference electrode R of the controllable precise voltage-stabilizing source U1 is connected with the common end of the voltage-stabilizing resistor R3 and the voltage-stabilizing resistor R4, and the anode A of the controllable precise voltage-stabilizing source U1 is grounded. The other end of the voltage stabilizing resistor R3 is connected with an emitting electrode of the triode Q1, and the other end of the voltage stabilizing resistor R4 is grounded. One end of the filter capacitor E1 is grounded, and the other end of the filter capacitor E1 is connected with the emitting end of the triode Q1. The filter capacitor E1 may be a polar capacitor, the emitter of the transistor Q1 is connected to the voltage output terminal out of the power supply circuit 500, and the voltage output by the voltage output terminal out supplies power to the signal processing circuit 200 and the communication circuit 400.
Specifically, the transistor Q1, the resistor R1, and the resistor R2 form a first switch 501; the controllable precision voltage regulator source U1, the voltage regulator resistor R3, and the voltage regulator resistor R4 form the voltage regulator circuit 502. The voltage stabilizing circuit 502 is connected to the power supply through the first switch 501, and the first switch 501 and the voltage stabilizing circuit 502 are respectively connected to the voltage output terminal out. The voltage regulator circuit 502 can maintain the output voltage substantially constant even when the input voltage fluctuates or the load changes. The voltage input by the power supply is loaded to a controllable precise voltage-stabilizing source U1 after passing through the first switch 501, is divided by a voltage-stabilizing resistor R3 and a voltage-stabilizing resistor R4, is filtered by a filter capacitor E1, and is output from a voltage output end out. The triode Q1 and the controllable precise voltage-stabilizing source U1 are used, so that the heating of the device can be reduced, and the loss is reduced.
In the embodiment, the first switch and the voltage stabilizing circuit are used for carrying out voltage reduction processing on the input voltage of the power supply, so that the heating of a device can be reduced, the loss is reduced, and the cost is saved.
In one embodiment, referring to fig. 3, the conditioning sampling circuit 100 includes a sampling interface JP1, a filter capacitor C1, a diode D1, a diode D2, a filter capacitor C2, a signal conditioner 101, and a filter capacitor C4. The sampling interface JP1 includes a first pin and a second pin, and the first pin and the second pin of the sampling interface JP1 are used for connecting a dimmer. The first end and the second end of the filter capacitor C1 are respectively connected with the first pin and the second pin of the sampling interface JP 1. The diode D1 is connected in series with the diode D2 in reverse, the common terminal formed by the cathode of the diode D1 and the cathode of the diode D2 is connected to the first pin of the sampling interface JP1, the anode of the diode D1 is connected to the probe signal transmission circuit 300, and the anode of the diode D2 is grounded. The filter capacitor C2 is connected in parallel with the diode D2. The signal conditioner 101 is connected to the second terminal of the filter capacitor C1 and the signal processing circuit 200, and is further connected to the anode of the diode D2. One end of the filter capacitor C4 is connected to the common terminal of the signal conditioner 101 and the signal processing circuit 200, and the other end of the filter capacitor C4 is grounded.
Specifically, the dimmer is connected to the first pin and the second pin of the sampling interface JP 1. The dimming signal from the dimmer is filtered by the filter capacitor C1 and the filter capacitor C2 to the signal conditioner 101. The probe signal transmitted by the probe signal transmission circuit 300 passes through the diode D2 and then reaches the first pin of the sampling interface JP1, because the diode D1 is reversely connected with the diode D2, the probe signal is transmitted to the dimmer through the first pin of the sampling interface JP1, forms a superimposed signal with a dimming signal sent by the dimmer after passing through the dimmer, and is transmitted to the signal conditioner 101 from the second pin of the sampling interface JP1 for conditioning. After being conditioned by the signal conditioner 101, the dimming signal sent by the dimmer is converted into a conditioned dimming signal conforming to the interface protocol of the signal processing circuit 200. The conditioned dimming signal output from the signal conditioner 101 is filtered by the filter capacitor C4 and then reaches the signal processing circuit 200.
In the above embodiment, the dimming signal sent by the dimmer is conditioned by the conditioning sampling circuit, so that the value range of the dimming signal in the dimmer can be increased, and the application scene of the dimming circuit is more flexible.
In one embodiment, referring to fig. 3, the signal conditioner 101 includes a resistor R5, a resistor R6, a resistor R7, and a filter capacitor C3. The resistor R5 is connected in series with the resistor R6, the common end of the resistor R3578 is grounded through the resistor R7, the other end of the resistor R5 is connected with the second end of the filter capacitor C1, and the other end of the resistor R6 is connected with the signal processing circuit 200 and the filter capacitor C4. The filter capacitor C3 is connected in parallel with the resistor R7.
Specifically, the dimming signal reaching the signal conditioner 101 is output to the filter capacitor C4 through the current limiting function of the resistor R5 and the resistor R6 and the voltage dividing function of the resistor R6 and the resistor R7, and is filtered by the filter capacitor C4 to reach the signal processing circuit 200.
In the above embodiment, the components in the signal conditioner can be selected according to the numerical range of the dimming signal sent by the actual dimmer, so that the conditioning function of the conditioning sampling circuit is realized, the setting range of the dimming signal in the dimmer can be increased, and the application scene of the dimming circuit is more flexible.
In one embodiment, referring to fig. 3, the signal processing circuit 200 includes a first chip O1, a reset resistor R8, a filter capacitor C5, and a decoupling capacitor C6. The signal acquisition terminal 5 of the first chip O1 is connected to the conditioning sampling circuit 100, and the power supply terminal 1 of the first chip O1 is connected to the power supply circuit 500 and grounded through a decoupling capacitor C6. The probe signal output terminal 7 of the first chip O1 is connected to the probe signal transmission circuit 300, and the signal output terminal 6 of the first chip O1 is connected to the communication circuit 400. The reset resistor R8 and the filter capacitor C5 are connected in series, the common end of the reset resistor R8 is connected with the power-on reset end 4 of the first chip O1, and the other end of the reset resistor R8 is connected with the power supply circuit 500; the other end of the filter capacitor C5 is grounded.
Specifically, the power supply terminal 1 of the first chip O1 is connected to the voltage output terminal out of the power supply circuit 500. The first chip O1 sends a probe signal to the probe signal transmission circuit 300, the probe signal is transmitted by the probe signal transmission circuit 300, and then forms a superimposed signal with a dimming signal sent by the dimmer through the dimmer, and forms a conditioned dimming signal after being conditioned by the conditioning sampling circuit 100, and then the conditioned dimming signal is transmitted to the signal acquisition terminal 5 of the first chip O1. The first chip O1 analyzes the received dimming signal, and when the dimming signal includes a feedback signal, determines that the dimmer is working normally, processes the dimming signal, and sends the processed dimming signal to the main controller through the communication circuit 400; when the dimming signal does not contain the feedback signal, it is determined that the dimmer is out of order, and the alarm information is sent to the main controller through the communication circuit 400.
In one embodiment, the first chip O1 is a PIC12F510 chip.
In the above embodiment, the first chip is arranged to analyze and process the signal, so that the signal processing capability of the dimming circuit can be improved, and the efficiency can be improved.
In one embodiment, with continued reference to fig. 3, the probe signal transmitting circuit 300 includes a transistor Q2, a resistor R9, a resistor R10, a transistor Q3, a resistor R11, a resistor R12, and a filter capacitor E2. The base of the triode Q2 is connected with the signal processing circuit 200 through a resistor R9, the collector of the triode Q2 is connected with the base of the triode Q3 through a resistor R11, and the emitter of the triode Q2 is grounded and connected with the base of the triode Q2 through a resistor R10. The emitter of the transistor Q3 is connected to the power supply through a resistor R12, and the collector of the transistor Q3 is connected to the conditioning sampling circuit 100. One end of the filter capacitor E2 is connected to a power supply, and the other end of the filter capacitor E2 is grounded.
The filter capacitor E2 may be a polar capacitor, the resistor R9 is connected to the probe signal output terminal 7 of the first chip O1 in the signal processing circuit 200, and the collector of the transistor Q3 is connected to the anode of the diode D1. Specifically, the transistor Q2, the resistor R9, and the resistor R10 form the second switch 301; the transistor Q3, the resistor R11, and the resistor R12 form the third switch 302. The probe signal outputted from the signal processing circuit 200 reaches the base of the transistor Q2 in the second switch 301, the transistor Q2 is turned on, and the signal is transmitted to the transistor Q3, and the transistor Q3 is turned on. At this time, an electric signal input by the power supply is filtered by the filter capacitor E2, transmitted to the diode D1 of the conditioning sampling circuit 100 through the triode Q3, and reaches the dimmer through the first pin of the sampling interface JP1, and the generated feedback signal is conditioned by the conditioning sampling circuit 100 together with a dimming signal sent by the dimmer and then sent to the signal processing circuit 200. It can be understood that, since the value of the electrical signal inputted by the power supply is fixed, the value of the feedback signal received by the signal processing circuit 200 is also fixed under the condition that the conditioning sampling circuit 100 and the dimmer circuit are fixed. Therefore, the signal processing circuit 200 can distinguish the received feedback signal according to the parameters of the external power supply of the probe signal transmission circuit. Optionally, the probe signal transmission circuit 300 and the signal processing circuit 200 may share an external power source.
Further, the signal processing circuit 200 may determine whether the probe signal needs to be transmitted according to the received dimming signal after receiving the dimming signal. When the received dimming signal is not zero, the probe signal is not transmitted, and at this time, the transistor Q2 in the second switch 301 and the transistor Q3 in the third switch 302 are both non-conductive, and the probe signal transmission circuit does not operate. When the received dimming signal is zero, the signal processing circuit 200 transmits a probe signal to the probe signal transmission circuit 300, and determines whether the dimmer is out of order through the feedback signal. When the received feedback signal is zero, judging that the dimmer has a fault, and sending alarm information to the main controller through the communication circuit 400; otherwise, the dimmer is judged to work normally, and the dimming data is output to the main controller through the communication circuit 400.
In the above embodiment, by setting the second switch and the third switch, the sending timing of the probe signal can be flexibly selected, and the probe signal is sent only when the received dimming signal is zero, so that the load of the signal processing circuit can be reduced, and the operating efficiency of the dimming circuit can be improved.
In one embodiment, with continued reference to fig. 3, the communication circuit 400 includes a current limiting resistor R13, a current limiting resistor R14, a photo coupler UB1, and a filter capacitor C7. One end of the current limiting resistor R13 is connected to the signal processing circuit 200, and the other end is connected to a first end of the transmitting portion of the photocoupler UB 1. One end of the current limiting resistor R14 is connected to the power supply circuit 500, and the other end is connected to the second end of the transmitting section of the photocoupler UB 1. The first end of the receiving part of the photoelectric coupler UB1 is connected with the main controller and is grounded through the filter capacitor C7, and the second end of the receiving part of the photoelectric coupler UB1 is grounded.
Specifically, the current limiting resistor R13 and the current limiting resistor R14 are used for limiting the current of the emitting part of the photoelectric coupler UB1 and protecting the emitting part of the photoelectric coupler UB 1. The voltage output terminal out of the power supply circuit 500 is connected to the photocoupler UB1 through a current limiting resistor R14 for supplying power to the photocoupler UB 1. The current limiting resistor R13 is connected to the signal output terminal 6 of the first chip O1 in the signal processing circuit 200, and receives the dimming data output by the signal processing circuit 200. And the photoelectric coupler UB1 encodes the dimming data according to a preset communication protocol and outputs the dimming data to the main controller, and the main controller dims the lamp according to the dimming data. As described above, in the case that the dimmer fails, the optical coupler UB1 will send alarm information to the main controller, and after the main controller receives the alarm information, the main controller outputs prompt information to remind the user to repair the dimmer.
In the above embodiment, according to predetermined communication protocol, carry out the back output to main control unit to the data of adjusting luminance through optoelectronic coupler, can send effective data or alarm information of adjusting luminance to main control unit, and the main control unit of being convenient for carries out the operation of adjusting luminance of lamps and lanterns, like this, is favorable to improving the reliability and the intelligent degree of dimming circuit.
It is understood that the voltage stabilizing circuit and the first, second and third switches may also take other forms, not limited to the forms mentioned in the above embodiments, as long as they can achieve the functions of voltage stabilizing and switching. Further, although polar filter capacitors are used in the embodiments described above, non-polar filter capacitors may alternatively be used.
In one embodiment, a light fixture is provided, which comprises a dimmer, a main controller, an illumination lamp and the dimming circuit of the above embodiments. The dimming circuit is connected with the dimmer and the main controller, and the main controller is connected with the illuminating lamp.
In particular, the lighting lamps in the lamp can be LED lamps. The dimming circuit acquires a dimming signal sent by the dimmer and a feedback signal after passing through the dimmer, and then judges whether the dimmer breaks down. When the dimmer breaks down, the dimming circuit sends alarm information to the main controller, and after the main controller receives the alarm information, the main controller outputs prompt information to remind a user of overhauling the dimmer. When the dimmer is not in fault, the dimming circuit processes the received dimming signal, sends dimming data to the main controller, and then the main controller performs dimming control on the lamp according to the dimming data.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A dimming circuit, comprising:
the conditioning sampling circuit receives the dimming signal output by the dimmer and outputs the conditioned dimming signal to the signal processing circuit;
outputting a probe signal to a probe signal transmission circuit, and transmitting dimming data to the signal processing circuit of the communication circuit;
injecting a probe signal to the probe signal transmission circuit of the dimmer;
the communication circuit receives the dimming signal and uploads the dimming signal to the main controller;
the signal processing circuit is connected with the conditioning sampling circuit, the probe signal transmission circuit and the communication circuit, the conditioning sampling circuit and the probe signal transmission circuit are used for connecting the light modulator, and the communication circuit is used for connecting the main controller.
2. The dimming circuit of claim 1, further comprising:
the power supply circuit receives a voltage signal output by the power supply and outputs a processed voltage signal to the signal processing circuit and the communication circuit; the power supply circuit is connected with the signal processing circuit and the communication circuit.
3. The dimming circuit according to claim 2, wherein the power supply circuit comprises a triode Q1, a resistor R1, a resistor R2, a controllable precision voltage-regulator U1, a voltage-regulator resistor R3, a voltage-regulator resistor R4 and a filter capacitor E1;
the collector of the triode Q1 is connected with the power supply through the resistor R1, the base of the triode Q1 is connected with the power supply through the resistor R2, and the emitter of the triode Q1 is connected with the voltage output end of the power supply circuit;
the cathode of the controllable precise voltage-stabilizing source U1 is connected with the base electrode of the triode Q1, the voltage-stabilizing resistor R3 is connected with the voltage-stabilizing resistor R4 in series, the reference electrode of the controllable precise voltage-stabilizing source U1 is connected with the common end formed by the voltage-stabilizing resistor R3 and the voltage-stabilizing resistor R4, and the anode of the controllable precise voltage-stabilizing source U1 is grounded;
the other end of the voltage-stabilizing resistor R3 is connected with an emitting electrode of the triode Q1, and the other end of the voltage-stabilizing resistor R4 is grounded;
one end of the filter capacitor E1 is grounded, and the other end of the filter capacitor E1 is connected with the emitting end of the triode Q1.
4. The dimming circuit of claim 1, wherein the conditioning sampling circuit comprises a sampling interface, a filter capacitor C1, a diode D1, a diode D2, a filter capacitor C2, a signal conditioner, and a filter capacitor C4;
the sampling interface comprises a first pin and a second pin, and the first pin and the second pin of the sampling interface are used for connecting the dimmer;
a first end and a second end of the filter capacitor C1 are respectively connected with a first pin and a second pin of the sampling interface;
the diode D1 is connected in series in reverse direction with the diode D2, a common terminal formed by a cathode of the diode D1 and a cathode of the diode D2 is connected with the first pin of the sampling interface, an anode of the diode D1 is connected with the probe signal transmission circuit, and an anode of the diode D2 is connected with the ground;
the filter capacitor C2 is connected in parallel with the diode D2;
the signal conditioner is connected with the second end of the filter capacitor C1 and the signal processing circuit, and is also connected with the anode of the diode D2;
one end of the filter capacitor C4 is connected with the common end of the signal conditioner and the signal processing circuit, and the other end of the filter capacitor C4 is grounded.
5. The dimming circuit of claim 4, wherein the signal conditioner comprises a resistor R5, a resistor R6, a resistor R7, and a filter capacitor C3;
the resistor R5 is connected in series with the resistor R6, the common end of the resistor R5 is grounded through the resistor R7, the other end of the resistor R5 is connected with the second end of the filter capacitor C1, and the other end of the resistor R6 is connected with the signal processing circuit and the filter capacitor C4;
the filter capacitor C3 is connected in parallel with the resistor R7.
6. The dimming circuit according to claim 2, wherein the signal processing circuit comprises a first chip, a reset resistor R8, a filter capacitor C5, and a decoupling capacitor C6;
the signal acquisition end of the first chip is connected with the conditioning sampling circuit; the power supply end of the first chip is connected with the power supply circuit and is grounded through a decoupling capacitor C6; the probe signal output end of the first chip is connected with the probe signal transmission circuit; the signal output end of the first chip is connected with the communication circuit;
the reset resistor R8 and the filter capacitor C5 are connected in series, and a common end of the reset resistor R8 and the filter capacitor C5 is connected with a power-on reset end of the first chip; the other end of the reset resistor R8 is connected with the power supply circuit; the other end of the filter capacitor C5 is grounded.
7. The dimming circuit of claim 6, wherein the first chip is a PIC12F510 chip.
8. The dimming circuit of claim 1, wherein the probe signal transmission circuit comprises a transistor Q2, a resistor R9, a resistor R10, a transistor Q3, a resistor R11, a resistor R12, and a filter capacitor E2;
the base of the triode Q2 is connected with the signal processing circuit through the resistor R9, the collector of the triode Q2 is connected with the base of the triode Q3 through the resistor R11, the emitter of the triode Q2 is grounded, and the base of the triode Q2 is connected through the resistor R10;
the emitter of the transistor Q3 is connected with a power supply through the resistor R12, and the collector of the transistor Q3 is connected with the conditioning sampling circuit;
one end of the filter capacitor E2 is connected with a power supply, and the other end of the filter capacitor E2 is grounded.
9. The dimming circuit of claim 2, wherein the communication circuit comprises a current limiting resistor R13, a current limiting resistor R14, a photocoupler, and a filter capacitor C7;
one end of the current-limiting resistor R13 is connected with the signal processing circuit, and the other end of the current-limiting resistor R13 is connected with the first end of the transmitting part of the photoelectric coupler; one end of the current-limiting resistor R14 is connected with the power supply circuit, and the other end of the current-limiting resistor R14 is connected with the second end of the transmitting part of the photoelectric coupler; the first end of the receiving part of the photoelectric coupler is connected with the main controller and is grounded through the filter capacitor C7, and the second end of the receiving part of the photoelectric coupler is grounded.
10. A luminaire comprising a dimmer, a master controller, a lighting lamp, and a dimming circuit as claimed in any one of claims 1 to 9; the dimming circuit is connected with the dimmer and the main controller, and the main controller is connected with the illuminating lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021968747.3U CN213462421U (en) | 2020-09-10 | 2020-09-10 | Dimming circuit and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021968747.3U CN213462421U (en) | 2020-09-10 | 2020-09-10 | Dimming circuit and lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213462421U true CN213462421U (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021968747.3U Active CN213462421U (en) | 2020-09-10 | 2020-09-10 | Dimming circuit and lamp |
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| Country | Link |
|---|---|
| CN (1) | CN213462421U (en) |
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2020
- 2020-09-10 CN CN202021968747.3U patent/CN213462421U/en active Active
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