Direct-current low-voltage power line carrier lamp control system

Abstract

The utility model relates to the technical field of communication, in particular to a lamp control system based on a direct-current low-voltage power line carrier technology, and particularly provides a direct-current low-voltage power line carrier lamp control system which comprises a direct-current low-voltage power line carrier module and a lamp interface under the conditions of long-distance transmission and high load current. The utility model discloses a low-voltage power line communication device, which comprises a power supply module, a control unit and a power supply module, and aims to improve the stability, reliability and anti-interference capability of data transmission by improving a low-voltage power line communication (PLC) technology, thereby solving the problem of unstable communication quality in a low-voltage power line environment in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to a lighting control system based on DC low-voltage power line carrier technology. This system utilizes low-voltage power line communication (PLC) technology to achieve power transmission and control signal transmission within the same pair of power lines, thereby significantly reducing system installation costs and finding wide application in fields such as intelligent lighting, building automation, and industrial automation control. Background Technology

[0002] With the rapid development of smart homes, building automation, and industrial control, low-voltage power line communication (PLC) technology has gradually become an important communication method. PLC technology utilizes existing power lines as the data transmission medium, offering advantages such as no need for additional communication lines, easy installation, and low cost. Therefore, PLC technology has been widely applied in smart lighting, home appliance control, and remote monitoring.

[0003] However, existing low-voltage power line communication technologies still face several technical challenges in low-voltage power line environments, mainly including limited communication distance, power line interference, and signal attenuation. These factors significantly affect the stability of data transmission and communication efficiency. Especially in long-distance transmission or under conditions of high load current, signal transmission quality often cannot be guaranteed, and electromagnetic interference and current noise in power lines are key factors affecting the stability of communication systems.

[0004] Existing PLC systems typically rely on dedicated communication lines or complex modulation and demodulation techniques to improve signal reliability, but these solutions often increase system complexity and cost. Furthermore, as the number of devices increases, traditional PLC technology exhibits significant limitations in stable communication and scalability among multiple devices, making it difficult to meet the demands of large-scale applications such as smart homes and industrial automation.

[0005] Therefore, there is an urgent need for an improved low-voltage power line communication module that can effectively solve the problems of unstable communication, high interference and poor scalability in the existing technology, and improve the performance and reliability of low-voltage power line communication systems in intelligent control and large-scale applications. Summary of the Invention

[0006] This invention provides a DC low-voltage power line carrier lighting control system, which aims to improve the stability, reliability and anti-interference capability of data transmission by improving low-voltage power line communication (PLC) technology, thereby solving the problem of unstable communication quality in the low-voltage power line environment in the prior art, especially under long-distance transmission and high load current conditions.

[0007] The technical solution of this utility model is as follows: a DC low-voltage power line carrier lighting control system, the system comprising:

[0008] The main controller includes a first modem, a power module, and a microcontroller unit (MCU) for generating control signals, modulating the control signals into power line carrier signals via the first modem, and sending them to the power line.

[0009] The slave controller includes a second modem and a lighting control interface. The second modem is used to receive power line carrier signals in the power line and demodulate them into control signals. The lighting control interface adjusts the brightness, color temperature and on / off status of the lighting fixtures according to the demodulated control signals.

[0010] The power module provides a stable power supply to the master controller and slave controllers, supporting low-voltage power supply of DC48±3V;

[0011] Power lines are used to connect the master controller and the slave controller, and to transmit power signals and power line carrier signals.

[0012] Preferably, the modem is a DC low-voltage power line carrier module, which includes:

[0013] The power line carrier modulation and demodulation circuit is used to modulate the control signal onto the power signal and extract the control signal from the received power signal.

[0014] The power line carrier communication circuit is used to transmit signals through power lines, enabling bidirectional communication between control signals and power line carrier signals. The carrier communication baud rate is 9600bps.

[0015] Preferably, the lamp interface uses power line communication technology to connect to the lamp, enabling remote control of the lamp's on / off state and brightness.

[0016] Preferably, the power module is an internal power supply, which is connected to an external lighting control system through a power interface to provide a stable power supply to the system.

[0017] Preferably, the power line carrier module operates in a low-voltage power environment, with a voltage range of DC48±3V.

[0018] Preferably, the DC low-voltage power line carrier module includes:

[0019] Input circuit: The input circuit is connected to an external power supply and is suitable for low-voltage power supply of DC48±3V;

[0020] Coupling circuit: The coupling circuit is connected to the input circuit and is used to couple the data signal to the DC power supply signal and isolate the DC power.

[0021] Low-voltage power line communication module: The low-voltage power line communication module is connected to the coupling circuit and MCU and is used for modulation and demodulation of data signals;

[0022] Output circuit: Output circuit and low-voltage power line communication module.

[0023] Preferably, the input circuit includes a high-differential-voltage LDO power supply chip and a filter capacitor, suitable for an input voltage range of DC48±3V.

[0024] Preferably, the coupling circuit includes at least two coupling capacitors for coupling signals to the power lines.

[0025] Preferably, the low-voltage power line communication module supports multi-device communication with a maximum of 256 nodes.

[0026] Preferably, the output circuit includes a Zener diode and a filter inductor.

[0027] Preferably, the communication rate of the module is 9600bps, the data format is 1 start bit, 8 data bits, 1 stop bit, and no parity check.

[0028] Preferably, the module supports improving communication instability caused by line attenuation by adding node power compensation.

[0029] The DC low-voltage power line carrier lighting control system of the present invention achieves intelligent control of lighting fixtures through the collaborative work of a master controller and a slave controller. The specific control process is as follows:

[0030] Signal generation and modulation: The microcontroller unit (MCU) in the master controller generates corresponding control signals based on the user's control commands, such as switching lights on and off, adjusting brightness, or adjusting color temperature. The control signals are modulated by the master controller's first modem, embedded into a power line carrier, and transmitted to the slave controllers via power lines.

[0031] Signal transmission and reception: The modulated power line carrier signal is transmitted to the connected slave controller via power lines. The power lines transmit both electrical energy and control signals, optimizing wiring costs and simplifying the system architecture.

[0032] Signal demodulation and processing: The system receives power line carrier signals from the power line from the second modem in the controller and demodulates them into the original control signals. The demodulated signals are then transmitted to the lighting control interface of the controller.

[0033] Lighting control: Based on received control signals from the controller's lighting control interface, the operating status of connected lighting fixtures is adjusted, including switching on / off, brightness, color temperature, and RGB color changes. Specific control signals are applied to the lighting fixtures via PWM (Pulse Width Modulation) or other driving methods to achieve precise control.

[0034] Feedback and Expansion: If the system supports bidirectional communication, the slave controller can also re-encode the status information of the lighting fixtures into power line carrier signals via a second modem and return them to the master controller via the power line for monitoring and further command adjustments. The system supports up to 256 slave controller nodes and can be expanded to control multiple lighting devices.

[0035] Anti-interference design: During the modulation, transmission and demodulation of signals, the master controller and slave controller effectively reduce noise and electromagnetic interference in the power line through optimized circuit design and filtering technology, ensuring the stability and reliability of the control signal.

[0036] The DC low-voltage power line carrier lighting control system of this invention achieves efficient and stable data transmission by optimizing low-voltage power line communication technology, significantly improving communication distance, anti-interference capability, and coordination among multiple devices. Specific technical effects are as follows:

[0037] Enhanced communication stability: By optimizing the design of the input circuit, coupling circuit, low-voltage power line communication module, and output circuit, this system can effectively reduce the interference of noise in the power line on the communication signal, thereby improving the data transmission stability and reliability of the system in a low-voltage power line environment.

[0038] Extensive application support: This system supports multi-device communication with up to 256 nodes, and the communication distance can reach 500 meters, meeting the data transmission needs of large-scale smart home, building automation, industrial control and other application scenarios.

[0039] Highly efficient control and adjustment functions: Supporting RGBCW dimming technology, it can precisely control the brightness, color temperature, and color of the lamps, with an output frequency set above 4000Hz, providing a flicker-free adjustment effect. Simultaneously, through human-centered lighting and circadian rhythm technology, this system can adjust the lighting according to the human body's biorhythms, improving the lighting needs of humans at different times of day, enhancing comfort and health.

[0040] Energy saving and high efficiency: Transmitting data and power via low-voltage power lines reduces the need for additional wiring, thereby lowering system installation and maintenance costs. Power line communication technology enables the system to operate in energy-saving mode, improving energy utilization efficiency.

[0041] Strong scalability and flexibility: This system supports interconnection of multiple devices and can optimize communication quality through power compensation in the event of unstable communication or long distance, ensuring the stable operation of large-scale intelligent control systems. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0043] Figure 2 This is a circuit diagram of the lighting control main controller of this utility model;

[0044] Figure 3 This is a circuit diagram of the lighting controller of this utility model.

[0045] Figure 2 The circuit wiring is too complex, so the wiring relationships are described as follows:

[0046] 1. Main power supply and power supply section

[0047] Main power inputs (DC+ and DC-): Connect to the input terminals of the regulator module: the Vin pin of VR1. The regulated 5V output is connected to the system's VCC bus to power subsequent modules.

[0048] 2. PLC modem module:

[0049] Input terminals (DC+ and DC- of P1 and P2): Connect to the main power supply lines (BUS_P and BUS_N).

[0050] Outputs (U2 - PLC Modem Chip): Data Bus Input: BUS_AI and BUS_BI are connected to the signal input pins of U2. Demodulation Output: U2's UART_TX and UART_RX are connected to the TX and RX pins of the MCU respectively for communication with the main control MCU.

[0051] Filtering components: Inductors (LP1, LP2) are connected in series across BUS_P and BUS_N to filter out bus noise. Capacitors (such as C4, C5) are connected in parallel across the bus to further smooth the bus voltage.

[0052] 3. Main Controller (MCU)

[0053] Power supply pins (VCC and GND): VCC is connected to the 5V power supply, and GND is connected to the common ground.

[0054] UART communication: RX and TX are connected to UART_TX and UART_RX of PLC module U2, respectively.

[0055] PWM Output: The PWM output pin is connected to the control pin of the lighting driver chip (such as PWM_LED1, PWM_LED2).

[0056] Control signal input: 1. The function key and switch button signals of the button interface (J3, J4, J5, J6) are connected to the GPIO pin of the MCU through resistors (such as R13 to R36).

[0057] 2. The DI and RO pins of the RS485 interface chip (U7) are connected to the TX and RX pins of the MCU respectively to enable communication with the touch screen.

[0058] 4. RS485 communication module

[0059] The communication chip (MAX485EESA) has DI (data input) and RO (data output) pins connected to the MCU's TX and RX pins, respectively. The A and B differential signal pins are connected to the RS485 bus for communication with the touchscreen. DE and RE pins control the communication direction and are typically adjusted by the MCU's control pins.

[0060] 5. Lighting driver module

[0061] PWM signal input: The PWM output pin of the MCU (such as PWM_LED1) is connected to the control input of the driver chip.

[0062] Power supply and protection: The VCC pin of the driver chip is connected to a 5V power supply. The driver output is connected to the positive and negative terminals of the LED lamp through filter capacitors (such as C12 and C13) and protection resistors (such as R7 and R8).

[0063] 6. Bus and Expansion Interface

[0064] Bus connection: The master controller's BUS_P and BUS_N are connected to the bus input terminals of all slave controllers respectively.

[0065] Expansion Interfaces: J3 to J6 provide multiple 8-pin interfaces, each of which can connect to a group of lighting or motor controllers. The specific pin functions are identified by the assigned address. Detailed Implementation

[0066] Example 1:

[0067] A DC low-voltage power line carrier lighting control system, the system comprising:

[0068] The main controller includes a first modem and a microcontroller unit (MCU) for generating control signals, modulating the control signals into power line carrier signals via the first modem and sending them to the power line.

[0069] The slave controller includes a second modem, a power module, and a lighting control interface. The second modem is used to receive power line carrier signals in the power line and demodulate them into control signals. The lighting control interface adjusts the brightness, color temperature, and on / off status of the lighting fixtures according to the demodulated control signals.

[0070] The power module provides a stable power supply to the master controller and slave controllers, supporting low-voltage power supply of DC48±3V;

[0071] Power lines are used to connect the master controller and the slave controller, and to transmit power signals and power line carrier signals.

[0072] Example 2:

[0073] The difference between this embodiment and Embodiment 1 is that this embodiment also includes the following technical features:

[0074] The modem is a DC low-voltage power line carrier module, which includes:

[0075] The power line carrier modulation and demodulation circuit is used to modulate the control signal onto the power signal and extract the control signal from the received power signal.

[0076] Power line carrier communication circuits are used to transmit signals over power lines, enabling bidirectional communication between control signals and power line carrier signals.

[0077] Preferably, the lamp interface uses power line communication technology to connect to the lamp, enabling remote control of the lamp's on / off state and brightness.

[0078] Preferably, the power module is an internal power supply, which is connected to an external lighting control system through a power interface to provide a stable power supply to the system.

[0079] Preferably, the power line carrier module operates in a low-voltage power environment, with a voltage range of DC48±3V.

[0080] Preferably, the DC low-voltage power line carrier module includes:

[0081] Input circuit: The input circuit is connected to an external power supply and is suitable for low-voltage power supply of DC48±3V;

[0082] Coupling circuit: The coupling circuit is connected to the input circuit and is used to couple the data signal to the DC power supply signal and isolate the DC power.

[0083] Low-voltage power line communication module: The low-voltage power line communication module is connected to the coupling circuit and MCU and is used for modulation and demodulation of data signals;

[0084] Output circuit: Output circuit and low-voltage power line communication module.

[0085] Preferably, the input circuit includes a high-differential-voltage LDO power supply chip and a filter capacitor, suitable for an input voltage range of DC48±3V.

[0086] Preferably, the coupling circuit includes at least two coupling capacitors for coupling signals to the power lines.

[0087] Preferably, the low-voltage power line communication module supports multi-device communication with a maximum of 256 nodes.

[0088] Preferably, the output circuit includes a Zener diode and a filter inductor.

[0089] Preferably, the communication rate of the module is 9600bps, the data format is 1 start bit, 8 data bits, 1 stop bit, and no parity check.

[0090] Preferably, the module supports power compensation by adding nodes.

Claims

1. A direct current low voltage power line carrier light control system, characterized by, The system comprises: a master controller comprising a first modem, a power module and a micro control unit (MCU) for generating a control signal, modulating the control signal into a power carrier signal through the first modem and sending the power carrier signal to a power line; a slave controller comprising a second modem for receiving and demodulating the power carrier signal in the power line into the control signal and a lamp control interface for adjusting the brightness, color temperature and on-off state of the lamp according to the demodulated control signal; a power module for providing stable power supply for the master controller and the slave controller and supporting low-voltage power supply of DC 48±3V; a power line for connecting the master controller and the slave controller and transmitting power signals and power carrier signals.

2. The low voltage power carrier lamp control system of claim 1, wherein, The modem is a direct-current low-voltage power carrier module, which comprises: a power carrier modulation and demodulation circuit for modulating the control signal into the power signal and extracting the control signal from the received power signal; a power carrier communication circuit for signal transmission through the power line to realize bidirectional communication of the control signal and the power carrier signal, and the carrier communication baud rate is 9600bps.

3. The low voltage power carrier lamp control system of claim 1, wherein, The lamp interface adopts power line communication technology to connect with the lamp and remotely control the on-off and brightness of the lamp.

4. The low voltage power carrier lamp control system of claim 1, wherein, The power module is an internal power supply connected with an external lamp control system through a power interface to provide stable power supply and stable communication loop for the system.

5. The low voltage power carrier lamp control system of claim 2, wherein, The power carrier module works in a low-voltage power environment with a voltage range of DC 48±3V low-voltage power supply.

6. The low voltage power carrier lamp control system of claim 1, wherein, The direct-current low-voltage power carrier module comprises: an input circuit connected with an external power supply and suitable for low-voltage power supply of DC 48±3V; a coupling circuit connected with the input circuit for coupling the data signal with the direct-current power signal and isolating the direct current; a low-voltage power line communication module connected with the coupling circuit and the MCU for modulating and demodulating the data signal; an output circuit and the low-voltage power line communication module.

7. The low voltage power carrier lamp control system of claim 6, wherein, The input circuit comprises a high-voltage difference LDO power chip and a filter capacitor and is suitable for an input voltage range of DC 48±3V.

8. The low voltage power carrier lamp control system of claim 7, wherein, The coupling circuit comprises at least two coupling capacitors for coupling the signal to the power line.

9. The low voltage power carrier lamp control system of claim 7, wherein, The low-voltage power line communication module supports multi-device communication of a maximum of 256 nodes.

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