A lighting control system

Abstract

The present application discloses a lighting control system, including a lighting control signal generating device, a control signal output device, a lighting control signal receiving device and a lighting control adjustment device. When the lighting control signal generating device receives a lighting control adjustment signal transmission instruction, it modulates the lighting control adjustment signal into a voltage square wave signal, and then transmits the voltage square wave signal to the lighting control signal receiving device through the power line of the controlled lighting after boosting the voltage square wave signal. The lighting control signal receiving device reduces the voltage of the received voltage square wave signal, and demodulates the reduced voltage square wave signal to obtain the lighting control adjustment signal. The lighting control adjustment device controls the lighting state of the controlled lighting according to the lighting control adjustment signal. Since the transmitting end first boosts the modulated lighting control adjustment signal before transmitting it, and the receiving end demodulates the boosted control adjustment signal after down-converting, the transmission distance of the lighting control adjustment signal is longer and the anti-interference ability is stronger.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent lamp control, and in particular to a lamp control system. Background Art

[0002] Lighting is a measure that uses various light sources to illuminate work and living places or individual objects. Lighting is not only to make the environment bright, but also to adjust according to the actual needs of the specific lighting environment (for example, lighting brightness and color, etc.). The intelligent lighting control system is used to adjust the brightness of the lighting. Generally, the light control signals of the intelligent lighting control system are communicated through power line communication (PLC, Power line Communication), but the data transmission distance of power line communication is short and the anti-interference ability is poor. Summary of the invention

[0003] The technical problem to be solved by the present application is how to improve the transmission distance and anti-interference capability of the light control signal in the intelligent light control system.

[0004] According to a first aspect, a light control system is used to adjust the lighting state of a controlled light, the light control system comprising a light control signal generating device, a control signal output device, a light control signal receiving device and a light control adjusting device;

[0005] The light control signal generating device is used to output a light control adjustment signal transmission instruction to the control signal output device;

[0006] The control signal output device is used to respond to the lamp control adjustment signal transmission instruction, modulate a lamp control adjustment signal into a voltage square wave signal, and transmit it to the lamp control signal receiving device through the power line of the controlled lamp;

[0007] The light control signal receiving device is used to demodulate the received voltage square wave signal to obtain the light control adjustment signal, and send the light control adjustment signal to the light control adjustment device;

[0008] The light control adjustment device controls the lighting state of the controlled light in response to the light control adjustment signal; the lighting state of the controlled light includes turning on, turning off, changing brightness and / or alarm mode;

[0009] The control signal output device includes a signal modulation circuit and a signal boosting circuit; the signal modulation circuit is used to encode and modulate the lamp control adjustment signal into the voltage square wave signal according to a preset encoding method; the signal boosting circuit is used to boost the voltage square wave signal and transmit the boosted voltage square wave signal to the lamp control signal receiving device through the power line of the controlled lamp.

[0010] In one embodiment, the light control signal receiving device includes a signal step-down circuit and a signal demodulation circuit; the signal step-down circuit is used to step down the received voltage square wave signal, and output the stepped-down voltage square wave signal to the signal demodulation circuit; the signal demodulation circuit obtains the light control adjustment signal based on the voltage square wave signal demodulation, and sends the light control adjustment signal to the light control adjustment device.

[0011] In one embodiment, the control signal output device includes a switching power supply circuit, and the switching power supply circuit is used to provide power for the light control signal output device; the switching power supply circuit includes an AC-DC conversion circuit, a DC transformer circuit, a light control adjustment signal output circuit and a switching power supply output circuit;

[0012] The AC-DC conversion circuit comprises an AC first input terminal, an AC second input terminal, a transformer first connection terminal, a transformer second connection terminal, a transformer third connection terminal and a lamp control adjustment signal output circuit connection terminal; the AC first input terminal and the AC second input terminal are used to respectively connect the neutral line N and the live line L of the power line of the controlled lamp; the transformer first connection terminal, the transformer second connection terminal and the transformer third connection terminal are connected to the DC conversion circuit; the lamp control adjustment signal output circuit connection terminal is connected to the lamp control adjustment signal output circuit;

[0013] The DC transformer circuit comprises a first connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal; the first connection terminal, the second connection terminal and the third connection terminal of the DC transformer circuit are respectively connected to the first connection terminal, the second connection terminal and the third connection terminal of the transformer of the AC-DC conversion circuit; the fourth connection terminal of the DC transformer circuit is connected to the switching power supply output circuit;

[0014] The light control adjustment signal output circuit includes a first connection end, a second connection end, a third connection end and a fourth connection end; the first connection end of the light control adjustment signal output circuit is connected to the light control adjustment signal output circuit connection end of the AC / DC conversion circuit, the second connection end of the light control adjustment signal output circuit is connected to the third connection end of the transformer of the AC / DC conversion circuit, the third connection end of the light control adjustment signal output circuit is connected to the fourth connection end of the DC transformer circuit; the fourth connection end of the light control adjustment signal output circuit is connected to the switching power supply output circuit;

[0015] The switching power supply output circuit includes a first connection terminal, a first output connection terminal, and a second output connection terminal; the first output connection terminal of the switching power supply output circuit is connected to the fourth connection terminal of the DC transformer circuit, and the first connection terminal of the switching power supply output circuit is connected to the fourth connection terminal of the lamp control adjustment signal output circuit; the first output connection terminal is used to output a first DC voltage signal, and the second output connection terminal is used to output a second DC voltage signal.

[0016] According to a second aspect, a lamp control method is provided for adjusting the brightness of a controlled lamp, the method comprising:

[0017] When receiving a light control adjustment signal transmission instruction, the light control signal generating device modulates the light control adjustment signal into a voltage square wave signal according to a preset coding method;

[0018] The lamp control signal generating device is also used to boost the voltage square wave signal and transmit it to the lamp control signal receiving device through the power line of the controlled lamp;

[0019] The lamp control signal receiving device reduces the voltage of the received square wave signal, and demodulates the reduced voltage square wave signal to obtain the lamp control adjustment signal;

[0020] sending the light control adjustment signal to a light control adjustment device;

[0021] The light control adjustment device controls the lighting state of the controlled light according to the light control adjustment signal; the lighting state of the controlled light includes opening, closing, changing brightness and / or alarm mode.

[0022] In one embodiment, the method further comprises:

[0023] When the light control signal generating device does not receive a new light control adjustment signal transmission instruction, the modulated voltage square wave signal after voltage boost is repeatedly sent to the light control signal receiving device.

[0024] In one embodiment, the preset encoding method is Manchester encoding.

[0025] A lighting control system according to the above embodiment includes a lighting control signal generating device, a lighting control signal output device, a lighting control signal receiving device and a lighting control adjustment device. When the lighting control signal generating device receives a lighting control adjustment signal transmission instruction, it modulates the lighting control adjustment signal into a voltage square wave signal, and then boosts the voltage square wave signal and transmits it to the lighting control signal receiving device through the power line of the controlled lamp. The lighting control signal receiving device steps down the voltage square wave signal received, and demodulates the stepped-down voltage square wave signal to obtain the lighting control adjustment signal. The lighting control adjustment device controls the lighting state of the controlled lamp according to the lighting control adjustment signal. Since the transmitting end first steps up the modulated lighting control adjustment signal before transmitting it, and the receiving end steps down the boosted control adjustment signal before demodulating it, the transmission distance of the lighting control adjustment signal is longer and the anti-interference ability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a lighting control system in an embodiment;

[0027] Figure 2 A circuit diagram of a switching power supply circuit in an embodiment;

[0028] Figure 3 is a circuit diagram of a DC voltage regulation circuit in an embodiment;

[0029] Figure 4 A circuit diagram of an AC power protection circuit in an embodiment;

[0030] Figure 5 is a circuit diagram of a signal boosting circuit in an embodiment;

[0031] Figure 6 A circuit diagram of a signal step-down circuit in an embodiment;

[0032] Figure 7 A schematic diagram of controller pin connections of a light control signal output device in an embodiment;

[0033] Figure 8 A schematic diagram of a square wave modulation output circuit of a controller of a light control signal output device in an embodiment;

[0034] Fig. 9 A schematic diagram of a square wave signal modulation circuit of a light control signal output device in an embodiment;

[0035] Fig.10 A schematic diagram of controller pin connections of a light control signal receiving device in an embodiment;

[0036] Fig.11 FIG. 4 is a flow chart of a lighting control method in another embodiment. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0038] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0039] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0040] In an embodiment of the present invention, a lamp control method is disclosed. First, a lamp control signal generating device receives a lamp control adjustment signal transmission instruction to modulate the lamp control adjustment signal into a voltage square wave signal, and then the voltage square wave signal is boosted and transmitted to the lamp control signal receiving device through the power line of the controlled lamp. Since the transmitting end first boosts the modulated lamp control adjustment signal before transmitting, the transmission distance of the lamp control adjustment signal is longer and the anti-interference ability is stronger.

[0041] Embodiment 1

[0042] Please refer to Figure 1, is a schematic diagram of the structure of a lighting control system in an embodiment, the lighting control system is used to adjust the brightness of a controlled lamp 5, and the lighting control system includes a lighting control signal generating device 1, a lighting control signal output device 2, a lighting control signal receiving device 3 and a lighting control adjusting device 4. The lighting control signal generating device 1 is used to output a lighting control adjusting signal transmission instruction to the lighting control signal output device 2. The control signal output device 2 is used to respond to the lighting control adjusting signal transmission instruction, modulate the lighting control adjusting signal into a voltage square wave signal, and transmit it to the lighting control signal receiving device 3 through the power line of the controlled lamp. The lighting control signal receiving device 3 is used to demodulate the lighting control adjusting signal according to the received voltage square wave signal, and send the lighting control adjusting signal to the lighting control adjusting device 4. The lighting control adjusting device 4 controls the lighting state of the controlled lamp 5 in response to the lighting control adjusting signal, wherein the lighting state of the controlled lamp includes opening, closing, changing brightness and / or alarm mode. The control signal output device 2 includes a signal modulation circuit 21 and a signal boost circuit 22. The signal modulation circuit 21 is used to encode and modulate the lighting control adjusting signal into a voltage square wave signal according to a preset encoding method. The signal boost circuit 22 is used to boost the voltage square wave signal, and transmit the boosted voltage square wave signal to the light control signal receiving device 3 through the power line of the controlled light 5. The light control signal receiving device 3 includes a signal step-down circuit 31 and a signal demodulation circuit 32. The signal step-down circuit 31 is used to step down the received voltage square wave signal, and output the stepped-down voltage square wave signal to the signal demodulation circuit 32. The signal demodulation circuit 32 demodulates the light control adjustment signal according to the voltage square wave signal, and sends the light control adjustment signal to the light control adjustment device. In one embodiment, the preset encoding method is Manchester encoding.

[0043] Please refer to Figure 2, is a circuit diagram of a switching power supply circuit in an embodiment. In one embodiment, the control signal output device 2 includes a switching power supply circuit, and the switching power supply circuit is used to provide power for the light control signal output device 2. The switching power supply circuit includes an AC-DC conversion circuit 10, a DC transformer circuit 20, a light control adjustment signal output circuit 30 and a switching power supply output circuit 40. The AC-DC conversion circuit 10 includes an AC first input terminal, an AC second input terminal, a transformer first connection terminal, a transformer second connection terminal, a transformer third connection terminal and a light control adjustment signal output circuit connection terminal. The AC first input terminal and the AC second input terminal are used to respectively connect the neutral line N and the live line L of the power line of the controlled light 5. The transformer first connection terminal, the transformer second connection terminal and the transformer third connection terminal are connected to the DC transformer circuit 20. The light control adjustment signal output circuit connection terminal is connected to the light control adjustment signal output circuit 40. The DC transformer circuit 20 includes a first connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal. The first connection end, the second connection end and the third connection end of the DC transformer circuit are respectively connected to the first connection end, the second connection end and the third connection end of the transformer of the AC-DC conversion circuit 10. The fourth connection end of the DC transformer circuit 20 is connected to the switching power supply output circuit 40. The light control adjustment signal output circuit 30 includes a first connection end, a second connection end, a third connection end and a fourth connection end, the first connection end of the light control adjustment signal output circuit 30 is connected to the light control adjustment signal output circuit connection end of the AC-DC conversion circuit 10, the second connection end of the light control adjustment signal output circuit 30 is connected to the third connection end of the transformer of the AC-DC conversion circuit 10, the third connection end of the light control adjustment signal output circuit 30 is connected to the fourth connection end of the DC transformer circuit 20, and the fourth connection end of the light control adjustment signal output circuit 30 is connected to the switching power supply output circuit 40. The switching power supply output circuit 40 includes a first connection terminal, a first output connection terminal and a second output connection terminal. The first output connection terminal of the switching power supply output circuit 40 is connected to the fourth connection terminal of the DC transformer circuit 20. The first connection terminal of the switching power supply output circuit 40 is connected to the fourth connection terminal of the lamp control adjustment signal output circuit 30. The first output connection terminal is used to output a first DC voltage signal, and the second output connection terminal is used to output a second DC voltage signal.

[0044] In one embodiment, the AC / DC conversion circuit 10 includes an AC / DC conversion chip DB1, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a resistor R11, a resistor R12, an inductor L11, a diode D11, and a diode D12. Two AC power input terminals of the AC / DC conversion chip DB1 are respectively connected to the AC first input terminal and the AC second input terminal of the AC / DC conversion circuit, a DC output terminal of the AC / DC conversion chip DB1 is connected to one end of the inductor L11, another DC output terminal of the AC / DC conversion chip DB2 is grounded, and the other end of the inductor L11 is connected to the first connection terminal of the transformer. Two ends of the capacitor C11 are respectively connected to the two DC output terminals of the AC / DC conversion chip DB1. One end of the capacitor C12 is connected to the first connection terminal of the transformer, and the other end of the capacitor C12 is grounded. One end of the capacitor C13 is connected to the connection terminal of the light control adjustment signal output circuit, and the other end is grounded. One end of the capacitor C14 is connected to the first connection terminal of the transformer, and the other end is connected to the negative electrode of the diode D11. One end of the resistor R11 is connected to the first connection end of the transformer, and the other end is connected to the cathode of the diode D11. One end of the resistor R12 is connected to the lamp control adjustment signal output circuit connection end, and the other end is connected to the cathode of the diode D12. The anode of the diode D11 is connected to the second connection end of the transformer, and the anode of the diode D12 is connected to the third connection end of the transformer.

[0045] In one embodiment, the DC transformer circuit 20 includes a transformer T11, a capacitor C21, a capacitor C22, a resistor R21 and a diode D21. The transformer T11 includes two groups of primary coil connection ends and a group of secondary coil connection ends, and the two connection ends of one group of primary coils of the transformer T11 are respectively connected to the first connection end and the second connection end of the DC transformer circuit 20. One connection end of another group of primary coils of the transformer T11 is connected to the third connection end of the DC transformer circuit, and the other connection end is grounded. One connection end of the secondary coil of the transformer T11 is connected to the positive pole of the diode D21, and the other connection end is grounded. The two ends of the capacitor C21 are respectively connected to the ground ends of the primary coil and the secondary coil of the transformer T11. One end of the capacitor C22 is connected to the negative pole of the diode D21, and the other end is grounded. One end of the resistor R21 is connected to the negative pole of the diode D21, and the other end is grounded.

[0046] In one embodiment, the light control adjustment signal output circuit includes a square wave signal generating chip U11, a pulse width control chip U12, a switch control chip U13, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35, a capacitor C31, a capacitor C32 and a capacitor C33. The square wave signal generating chip U11 includes a power connection terminal VDD, a reference voltage input terminal FB, an output feedback connection terminal COMP and a voltage signal output terminal DRAIN. The power connection terminal VDD is connected to the first connection terminal of the light control adjustment signal output circuit 30, the voltage signal output terminal DRAIN is connected to the second connection terminal of the light control adjustment signal output circuit 30, the output feedback connection terminal COMP is connected to one end of the capacitor C31, and the other end of the capacitor C31 is grounded. The resistor R32 is connected in series with the capacitor C32, one end of the series connection is connected to the output feedback connection terminal COMP, and the other end of the series connection is grounded. The pulse width control chip U12 includes a first connection end, a second connection end, a third connection end and a fourth connection end. The first connection end and the second connection end of the pulse width control chip U12 are respectively connected to the two ends of the resistor R33. The third connection end of the pulse width control chip U12 is connected to one end of the resistor R31. The other end of the resistor R31 is connected to the voltage signal output end DRAIN. The fourth connection end of the pulse width control chip U12 is grounded. The switch control chip U13 includes a first connection end, a second connection end and a third connection end. The first connection end of the switch control chip U13 is connected to the fourth connection end of the light control adjustment signal output circuit 30. The second connection end of the switch control chip U13 is connected to the second connection end of the pulse width control chip U12. The third connection end of the switch control chip U13 is grounded. One end of the resistor R34 is connected to the first connection end of the pulse width control chip U12, and the other end is connected to the third connection end of the light control adjustment signal output circuit 30. The resistor R35 and the capacitor C33 are connected in series, one end of the series connection is connected to the second connection end of the pulse width control chip U12 , and the other end of the series connection is connected to the fourth connection end of the lamp control adjustment signal output circuit 30 .

[0047] In one embodiment, the switching power supply output circuit 40 includes a resistor R41, a resistor R42, a resistor R43 and a diode ZD1. One end of the resistor R41 is connected to the first connection end of the switching power supply output circuit 40, and the other end is connected to the first output connection end of the switching power supply output circuit 40. One end of the resistor R42 is connected to the first connection end of the switching power supply output circuit 40, and the other end is grounded. One end of the resistor R43 is connected to the first output connection end of the switching power supply output circuit 40, and the other end is connected to the second output connection end of the switching power supply output circuit 40. The anode of the diode ZD1 is grounded, and the cathode of the diode ZD1 is connected to the second output connection end of the switching power supply output circuit 40.

[0048] Please refer to Figure 3, is a circuit diagram of a DC voltage regulation circuit in an embodiment. In one embodiment, the switching power supply circuit also includes a DC voltage regulation circuit for adjusting the first DC voltage signal to a second DC voltage signal to provide different DC voltage sources. The DC voltage regulation circuit includes a voltage chip U14, a capacitor C41, a capacitor C42, a first voltage source connection terminal, and a second voltage source connection terminal. The first voltage source connection terminal is used for inputting the first DC voltage signal, and the second voltage source connection terminal is used for outputting the second DC voltage signal. The voltage chip U14 includes an input voltage connection terminal, an output voltage connection terminal, and a ground terminal. The input voltage connection terminal of the voltage chip U14 is connected to the first voltage source connection terminal, the output voltage connection terminal of the voltage chip U14 is connected to the second voltage source connection terminal, and the ground terminal of the voltage chip U14 is grounded. Capacitor C41 is connected between the first voltage source connection terminal and the ground, and capacitor C42 is connected between the second voltage source connection terminal and the ground. Please refer to Figure 4 , is a circuit diagram of an AC power protection circuit in an embodiment. In one embodiment, the switching power supply circuit also includes an AC power protection circuit for protecting the AC-DC conversion circuit 10. The AC power protection circuit includes a neutral line connection terminal N, a live line connection terminal L, an adjustable resistor R47, an adjustable resistor R46, a capacitor C43, an inductor L41 and a fuse FU2.

[0049] Please refer to Figure 5 , is a circuit diagram of a signal boosting circuit in an embodiment, the signal boosting circuit includes a resistor row, a resistor R45, an amplifying transistor M1, a signal input terminal to be amplified, an amplified signal output terminal and a boosting power supply input terminal. The signal input terminal to be amplified is used for inputting a voltage square wave signal, the amplified signal output terminal is used for outputting a boosted voltage square wave signal, and the boosting power supply input terminal is used to provide power for the amplifying transistor M1. The resistor row includes at least one resistor R44, one end of the resistor row is connected to the boosting power supply input terminal, and the other end is connected to the second electrode of the amplifying transistor M1. The first electrode of the amplifying transistor M1 is grounded, and the second electrode of the amplifying transistor M1 is connected to the amplified signal output terminal. One end of the resistor R45 is connected to the control electrode of the amplifying transistor M1, and the other end is connected to the signal input terminal to be amplified. After the controller of the light control signal output device collects the analog signal, it is connected to the control electrode of the transistor M3 through the resistor R45. One end of the resistor row is connected to the 12V voltage, and the other end is connected to the second electrode of the transistor M1. When the connection end of the controller of the light control signal output device is at a high level, the transistor M1 is turned on, and the second electrode of the transistor M1 will output an enlarged digital voltage signal to realize the signal amplification function.

[0050] Please refer to Figure 6, is a circuit diagram of a signal step-down circuit in an embodiment, including a signal step-down circuit resistor R51, a resistor R52, a resistor R53, a resistor R54, a resistor R55, a diode D51, an amplifying transistor M2, an amplifying transistor M3, a signal input terminal to be stepped down, a step-down power supply input terminal and a step-down signal output terminal. The signal input terminal to be stepped down is used for inputting the voltage square wave signal to be stepped down, and the step-down power supply input terminal is used for providing power. The positive electrode of the diode D51 is grounded, and the negative electrode is connected to the signal input terminal to be stepped down. One end of the resistor R52 is connected to the signal input terminal to be stepped down, and the other end is connected to the resistor R51 and the resistor 53. One end of the resistor R51 is grounded, and the other end is connected to the resistor R52. One end of the resistor R53 is connected to one end of the resistor R52, and the other end is connected to the control electrode of the amplifying transistor M3. The first electrode of the amplifying transistor M3 is connected to one end of the resistor R54, the second electrode of the amplifying transistor M3 is grounded, and the other end of the resistor R54 is connected to the step-down power supply input terminal. The control electrode of the amplifier transistor M2 is connected to the first electrode of the amplifier transistor M3, the second electrode of the amplifier transistor M2 is grounded, and the first electrode of the amplifier transistor M2 is connected to the buck signal output terminal. One end of the resistor R55 is connected to the buck power input terminal, and the other end is connected to the buck signal output terminal.

[0051] Please refer to Figure 7 , is a schematic diagram of the controller pin connection of a light control signal output device in an embodiment. The controller U6 of the light control signal output device is used to encode and modulate the light control adjustment signal into a voltage square wave signal according to a preset encoding method. In one embodiment, the model of the controller U6 of the light control signal output device is NUC029LAN. Please refer to Figure 8 , is a schematic diagram of a square wave modulation output circuit of a controller of a light control signal output device in an embodiment, and the square wave modulation circuit is used to output a voltage square wave signal. The controller of the light control signal output device outputs a PWM signal, which is output through the 1st pin of the operational amplifier U8 and outputs a 0-10V signal, which is filtered by the common mode inductor L0 and the capacitor C61, and then divided by R61 and R62 and provided to the 2nd pin of the controller U6 for sampling. In one embodiment, the model of the operational amplifier U8 is LM2904. Please refer to Fig. 9 , is a schematic diagram of a square wave signal modulation output circuit of a light control signal output device in an embodiment, the square wave signal modulation output circuit is used to output a modulated square wave signal and filter the signal. Please refer to Fig.10 , is a schematic diagram of controller pin connections of a light control signal receiving device in an embodiment. In one embodiment, the model of the controller U5 of the light control signal receiving device is N76E003AT20.

[0052] In an embodiment of the present invention, a light control system is disclosed, including a light control signal generating device, a light control signal output device, a light control signal receiving device and a light control adjustment device. When the light control signal generating device receives a light control adjustment signal transmission instruction, it modulates the light control adjustment signal into a voltage square wave signal, and then boosts the voltage square wave signal and transmits it to the light control signal receiving device through the power line of the controlled light. The light control signal receiving device steps down the received voltage square wave signal, and demodulates the stepped-down voltage square wave signal to obtain the light control adjustment signal. The light control adjustment device controls the lighting state of the controlled light according to the light control adjustment signal. Since the transmitting end first steps up the modulated light control adjustment signal before transmitting it, and the receiving end steps down the stepped-up control adjustment signal before demodulating it, the transmission distance of the light control adjustment signal is longer and the anti-interference ability is stronger.

[0053] Embodiment 2

[0054] Please refer to Fig.11 , is a flow chart of a light control method in another embodiment, the light control method is used to adjust the brightness of a controlled light, including:

[0055] Step 110, modulate the light control signal into a square wave signal.

[0056] When receiving a light control adjustment signal transmission instruction, the light control signal generating device modulates the light control adjustment signal into a voltage square wave signal according to a preset coding method. In one embodiment, the preset coding method is Manchester coding.

[0057] Step 120, boost the square wave signal and then send it out.

[0058] The lamp control signal generating device is also used for transmitting the voltage square wave signal to the lamp control signal receiving device through the power line of the controlled lamp after boosting the voltage square wave signal.

[0059] Step 130, reducing the voltage of the received square wave signal.

[0060] The lamp control signal receiving device steps down the voltage of the received voltage square wave signal.

[0061] Step 140: demodulate and output the light control signal.

[0062] The lamp control signal receiving device demodulates the stepped-down voltage square wave signal to obtain a lamp control adjustment signal.

[0063] Step 150, controlling the lighting state of the lamp.

[0064] The light control adjustment signal is sent to the light control adjustment device, and the light control adjustment device controls the lighting state of the controlled light according to the light control adjustment signal. The lighting state of the controlled light includes on, off, brightness change and / or alarm mode.

[0065] In one embodiment, the lighting control method further includes:

[0066] When the light control signal generating device does not receive a new light control adjustment signal transmission instruction, the modulated voltage square wave signal after voltage boosting is repeatedly sent to the light control signal receiving device.

[0067] In the application embodiment, the light control adjustment signal is amplified to a DC voltage signal of 12V, 24V or 36V through a special hardware circuit, and the voltage is used to transmit a square wave signal to increase the transmission distance and improve the anti-interference ability. The receiving end converts the DC square wave signal of the voltage into a voltage signal that meets the chip operation requirements through a step-down process. The sending end software uses Manchester encoding to transmit data through an ordinary IO port, and the receiving end decodes to obtain the corresponding data signal. In order to ensure the accuracy of the data and reduce the bit error rate of the data, the data sending end continuously sends the data signal when the data bus is idle, and the receiving end continuously corrects the received data to finally obtain the correct digital signal, thereby realizing long-distance and stable transmission of the light control adjustment signal.

[0068] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. A lighting control system for adjusting the lighting state of a controlled lamp, characterized in that: The lighting control system includes a lighting control signal generating device, a control signal output device, a lighting control signal receiving device and a lighting control adjusting device; The light control signal generating device is used to output a light control adjustment signal transmission instruction to the control signal output device; The control signal output device is used to respond to the lamp control adjustment signal transmission instruction, modulate a lamp control adjustment signal into a voltage square wave signal, and transmit it to the lamp control signal receiving device through the power line of the controlled lamp; The light control signal receiving device is used to demodulate the received voltage square wave signal to obtain the light control adjustment signal, and send the light control adjustment signal to the light control adjustment device; The light control adjustment device controls the lighting state of the controlled light in response to the light control adjustment signal; the lighting state of the controlled light includes turning on, turning off, changing brightness and / or alarm mode; The control signal output device includes a signal modulation circuit and a signal boost circuit; the signal modulation circuit includes a controller U6, and the controller U6 is used to encode and modulate the lamp control adjustment signal into the voltage square wave signal according to a preset encoding method; the model of the controller U6 is NUC029LAN; the signal boost circuit is used to boost the voltage square wave signal, and transmit the boosted voltage square wave signal to the lamp control signal receiving device through the power line of the controlled lamp; The light control signal receiving device comprises a signal step-down circuit and a signal demodulation circuit; the signal step-down circuit is used to step down the received voltage square wave signal, and output the stepped-down voltage square wave signal to the signal demodulation circuit; the signal demodulation circuit demodulates the voltage square wave signal to obtain the light control adjustment signal, and sends the light control adjustment signal to the light control adjustment device; The signal boosting circuit comprises a resistor row, a resistor R45, an amplifying transistor M1, a signal input terminal to be amplified, an amplified signal output terminal and a boosting power supply input terminal; the signal input terminal to be amplified is used for inputting the voltage square wave signal, the amplified signal output terminal is used for outputting the boosted voltage square wave signal, and the boosting power supply input terminal is used for providing power to the amplifying transistor M1; the resistor row comprises six resistors R44, one end of the resistor row is connected to the boosting power supply input terminal, and the other end is connected to the second electrode of the amplifying transistor M1; the first electrode of the amplifying transistor M1 is grounded, and the second electrode of the amplifying transistor M1 is connected to the amplified signal output terminal; one end of the resistor R45 is connected to the control electrode of the amplifying transistor M1, and the other end is connected to the signal input terminal to be amplified; The signal step-down circuit includes a resistor R51, a resistor R52, a resistor R53, a resistor R54, a resistor R55, a diode D51, an amplifying transistor M2, an amplifying transistor M3, a signal input terminal to be stepped down, a step-down power input terminal and a step-down signal output terminal; the signal input terminal to be stepped down is used for inputting the voltage square wave signal to be stepped down, and the step-down power input terminal is used for providing power; The anode of the diode D51 is grounded, and the cathode is connected to the input terminal of the signal to be stepped down; One end of the resistor R52 is connected to the input end of the signal to be stepped down, and the other end is connected to the resistor R51 and the resistor 53; One end of the resistor R51 is grounded, and the other end is connected to the resistor R52; One end of the resistor R53 is connected to one end of the resistor R52, and the other end is connected to the control electrode of the amplifying transistor M3; A first electrode of the amplifying transistor M3 is connected to one end of the resistor R54, a second electrode of the amplifying transistor M3 is grounded, and the other end of the resistor R54 is connected to the step-down power supply input end; The control electrode of the amplifying transistor M2 is connected to the first electrode of the amplifying transistor M3, the second electrode of the amplifying transistor M2 is grounded, and the first electrode of the amplifying transistor M2 is connected to the step-down signal output terminal; One end of the resistor R55 is connected to the step-down power supply input end, and the other end is connected to the step-down signal output end; The preset encoding method is Manchester encoding.

2. The lighting control system according to claim 1, characterized in that: The control signal output device comprises a switching power supply circuit, and the switching power supply circuit is used to provide power for the control signal output device; the switching power supply circuit comprises an AC-DC conversion circuit, a DC transformer circuit, a lamp control adjustment signal output circuit and a switching power supply output circuit; The AC-DC conversion circuit comprises an AC first input terminal, an AC second input terminal, a transformer first connection terminal, a transformer second connection terminal, a transformer third connection terminal and a lamp control adjustment signal output circuit connection terminal; the AC first input terminal and the AC second input terminal are used to respectively connect the neutral line N and the live line L of the power line of the controlled lamp; the transformer first connection terminal, the transformer second connection terminal and the transformer third connection terminal are connected to the DC conversion circuit; the lamp control adjustment signal output circuit connection terminal is connected to the lamp control adjustment signal output circuit; The DC transformer circuit comprises a first connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal; the first connection terminal, the second connection terminal and the third connection terminal of the DC transformer circuit are respectively connected to the first connection terminal, the second connection terminal and the third connection terminal of the transformer of the AC-DC conversion circuit; the fourth connection terminal of the DC transformer circuit is connected to the switching power supply output circuit; The light control adjustment signal output circuit includes a first connection end, a second connection end, a third connection end and a fourth connection end; the first connection end of the light control adjustment signal output circuit is connected to the light control adjustment signal output circuit connection end of the AC / DC conversion circuit, the second connection end of the light control adjustment signal output circuit is connected to the third connection end of the transformer of the AC / DC conversion circuit, the third connection end of the light control adjustment signal output circuit is connected to the fourth connection end of the DC transformer circuit; the fourth connection end of the light control adjustment signal output circuit is connected to the switching power supply output circuit; The switching power supply output circuit includes a first connection terminal, a first output connection terminal, and a second output connection terminal; the first output connection terminal of the switching power supply output circuit is connected to the fourth connection terminal of the DC transformer circuit, and the first connection terminal of the switching power supply output circuit is connected to the fourth connection terminal of the lamp control adjustment signal output circuit; the first output connection terminal is used to output a first DC voltage signal, and the second output connection terminal is used to output a second DC voltage signal.

3. The lighting control system as claimed in claim 2, characterized in that: The AC-DC conversion circuit includes an AC-DC conversion chip DB1, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a resistor R11, a resistor R12, an inductor L11, a diode D11 and a diode D12; Two AC power input terminals of the AC / DC conversion chip DB1 are respectively connected to the first AC input terminal and the second AC input terminal of the AC / DC conversion circuit, a DC output terminal of the AC / DC conversion chip DB1 is connected to one end of the inductor L11, another DC output terminal of the AC / DC conversion chip DB2 is grounded, and the other end of the inductor L11 is connected to the first connection terminal of the transformer; The two ends of the capacitor C11 are respectively connected to the two DC output ends of the AC / DC conversion chip DB1; One end of the capacitor C12 is connected to the first connection end of the transformer, and the other end of the capacitor C12 is grounded; One end of the capacitor C13 is connected to the lamp control adjustment signal output circuit connection end, and the other end is grounded; One end of the capacitor C14 is connected to the first connection end of the transformer, and the other end is connected to the cathode of the diode D11; One end of the resistor R11 is connected to the first connection end of the transformer, and the other end is connected to the cathode of the diode D11; One end of the resistor R12 is connected to the lamp control adjustment signal output circuit connection end, and the other end is connected to the cathode of the diode D12; The anode of the diode D11 is connected to the second connection terminal of the transformer, and the anode of the diode D12 is connected to the third connection terminal of the transformer; And / or, the DC transformer circuit includes a transformer T11, a capacitor C21, a capacitor C22, a resistor R21 and a diode D21; the transformer T11 includes two groups of primary coil connection ends and one group of secondary coil connection ends, and the two connection ends of one group of primary coils of the transformer T11 are respectively connected to the first connection end and the second connection end of the DC transformer circuit; one connection end of another group of primary coils of the transformer T11 is connected to the third connection end of the DC transformer circuit, and the other connection end is grounded; one connection end of the secondary coil of the transformer T11 is connected to the positive electrode of the diode D21, and the other connection end is grounded; The two ends of capacitor C21 are connected to the ground terminals of the primary coil and the secondary coil of transformer T11 respectively; One end of the capacitor C22 is connected to the cathode of the diode D21, and the other end is grounded; One end of the resistor R21 is connected to the cathode of the diode D21, and the other end is grounded; And / or, the light control adjustment signal output circuit includes a square wave signal generating chip U11, a pulse width control chip U12, a switch control chip U13, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35, a capacitor C31, a capacitor C32 and a capacitor C33; the square wave signal generating chip U11 includes a power connection terminal VDD, a reference voltage input terminal FB, an output feedback connection terminal COMP and a voltage signal output terminal DRAIN, the power connection terminal VDD is connected to a first connection terminal of the light control adjustment signal output circuit, the voltage signal output terminal DRAIN is connected to a second connection terminal of the light control adjustment signal output circuit, the output feedback connection terminal COMP is connected to one end of the capacitor C31, and the other end of the capacitor C31 is grounded; The resistor R32 and the capacitor C32 are connected in series, one end of the series connection is connected to the output feedback connection terminal COMP, and the other end of the series connection is grounded; The pulse width control chip U12 includes a first connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal; the first connection terminal and the second connection terminal of the pulse width control chip U12 are respectively connected to the two ends of the resistor R33; the third connection terminal of the pulse width control chip U12 is connected to one end of the resistor R31, and the other end of the resistor R31 is connected to the voltage signal output terminal DRAIN; the fourth connection terminal of the pulse width control chip U12 is grounded; The switch control chip U13 includes a first connection end, a second connection end and a third connection end, the first connection end of the switch control chip U13 is connected to the fourth connection end of the light control adjustment signal output circuit, the second connection end of the switch control chip U13 is connected to the second connection end of the pulse width control chip U12, and the third connection end of the switch control chip U13 is grounded; One end of the resistor R34 is connected to the first connection end of the pulse width control chip U12, and the other end is connected to the third connection end of the lamp control adjustment signal output circuit; The resistor R35 and the capacitor C33 are connected in series, one end of the series connection is connected to the second connection end of the pulse width control chip U12, and the other end of the series connection is connected to the fourth connection end of the light control adjustment signal output circuit; And / or, the switching power supply output circuit includes a resistor R41, a resistor R42, a resistor R43 and a diode ZD1; one end of the resistor R41 is connected to the first connection end of the switching power supply output circuit, and the other end is connected to the first output connection end of the switching power supply output circuit; One end of the resistor R42 is connected to the first connection end of the switching power supply output circuit, and the other end is grounded; One end of the resistor R43 is connected to the first output connection end of the switching power supply output circuit, and the other end is connected to the second output connection end of the switching power supply output circuit; The anode of the diode ZD1 is grounded, and the cathode of the diode ZD1 is connected to the second output connection terminal of the switching power supply output circuit.

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