Modem module based on direct-current low-voltage power line carrier, intelligent control system and control method

Abstract

The invention relates to the technical field of power line communication, in particular to a modem module, an intelligent control system and a control method based on a direct-current low-voltage power line carrier, and provides the modem module, the intelligent control system and the control method based on the direct-current low-voltage power line carrier. The requirements of independent communication lines are reduced by utilizing the power line carrier technology, and the overall wiring and installation cost is reduced. Due to the low-power-consumption design and the efficient communication modulation mechanism of the system, the energy consumption of system operation is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power line communication, and particularly to a modem module, an intelligent control system and a control method thereof based on DC low-voltage power carrier. Background Art

[0002] With the rapid development of the Internet of Things and intelligent technologies, the traditional wiring and control methods can no longer meet the requirements for efficient communication and device control in modern smart home, industrial automation, intelligent lighting and other fields. In these scenarios, the system is required to achieve the functions of data transmission and device control in a low-cost and low-power consumption manner.

[0003] Low-voltage power line communication technology (PLC) transmits power and data simultaneously on the same pair of wires, greatly reducing the wiring cost and complexity of the system. Existing low-voltage power line communication solutions usually rely on AC power carrier technology. However, due to the characteristics of alternating current, its communication stability is easily affected by electromagnetic interference and power fluctuations. In addition, the support for multi-device communication in the existing technology is limited, usually only a small number of device nodes can be adapted, and the demand for large-scale node communication cannot be met.

[0004] In order to achieve intelligent control of multiple devices, the combination of a modem module, a controller module and a communication method has been proposed in the existing technology. However, these solutions still have deficiencies in terms of stability, device compatibility and real-time feedback performance. For example: 1. The design of the modem module is complex, the efficiency of modulation and demodulation is low, and it does not have sufficient scalability.

[0005] 2. The system cannot effectively support the stable communication of multi-node devices in a low-voltage DC power supply environment.

[0006] 3. In the process of multi-device control, the existing methods lack a reliable real-time feedback mechanism and cannot achieve efficient dynamic adjustment.

[0007] Therefore, there is an urgent need for an improved technical solution based on DC low-voltage power carrier to solve the above problems of the existing technology by optimizing the modem module and communication architecture, and to provide an efficient and reliable solution for multi-device intelligent control. Summary of the Invention

[0008] In order to solve the deficiencies of the existing low-voltage power line communication system in multi-node communication, real-time control and system stability, the present invention provides a modem module, an intelligent control system and a control method thereof based on DC low-voltage power carrier.

[0009] The present invention aims to solve the following technical problems: 1. How to achieve efficient modulation and demodulation of data signals by improving the modem module, while supporting reliable communication in a low-voltage DC environment.

[0010] 2. How to achieve efficient communication and stable control of multiple device nodes in an intelligent control system.

[0011] 3. How to design a control method to enable the system to achieve real-time device control and dynamic feedback, improving communication efficiency and device compatibility.

[0012] The technical solution of the present invention is as follows: A DC low-voltage power line carrier modem module, characterized by comprising: A. Input circuit: Connected to an external power supply, suitable for low-voltage power supply of DC10 - 60V; B. Coupling circuit: Connected to the input circuit, used to couple the data signal with the DC power signal; C. Low-voltage power line communication module: Connected to the coupling circuit, used to modulate and demodulate the data signal; D. Output circuit: Connected to the low-voltage power line communication module E. MCU: The MCU is connected to the low-voltage power line communication module and the output circuit, used to receive and process communication data.

[0013] Preferably, the input circuit includes an LDO power chip and filter capacitors.

[0014] Preferably, the coupling circuit includes at least two coupling capacitors.

[0015] Preferably, the low-voltage power line communication module supports multi-device communication.

[0016] Preferably, the output circuit includes a zener diode and a filter inductor.

[0017] The technical solution of the intelligent control system based on the DC low-voltage power line carrier modem of the present application is as follows, including: A master controller, the master controller includes a first modem, a power supply module and a micro-control unit MCU, used to generate a control signal, modulate the control signal into a power line carrier signal through the first modem and send it to the power line; A slave controller, the slave controller includes a second modem and an electrical control interface, the second modem is used to receive the power line carrier signal in the power line and demodulate it into a control signal, and the electrical control interface adjusts the electrical appliance according to the demodulated control signal; A power supply module, providing stable power for the master controller and the slave controller, supporting low-voltage power supply of DC10 - 60V; A power line for connecting a master controller and a slave controller and transmitting power signals and power carrier signals.

[0018] Preferably, the intelligent control system based on a DC low-voltage power line carrier modem of the present application further includes: 1. The master controller module includes a function key interface and an RS-485 color touch screen interface; 2. The slave controller module includes an address recognition function; 3. The stabilizer module filters out interference signals through high-frequency filter capacitors and low-pass filter inductors; 4. The communication architecture supports a dynamic node detection function; 5. The control device supports PWM dimming; 6. Both the master controller and the slave controller include an MCU.

[0019] An intelligent control method based on a DC low-voltage power line carrier modem of the present application includes the following steps: Modulation signal generation: The master controller modulates the control signal into a high-frequency signal through a modulation module and superimposes it on the power supply signal; Signal transmission: The control signal and the power supply signal are transmitted to the bus through DC low-voltage power line carrier; Signal parsing: The slave controller parses the bus signal through a demodulation module and generates a control command; Device action execution: The slave controller performs operations on the device according to the control command; Feedback signal transmission: The slave controller feeds back the execution status to the master controller through the modem.

[0020] Preferably, the intelligent control method further includes: using on-off keying modulation technology in the modulation signal generation step; using a daisy-chain topology structure in the signal transmission step; in the signal parsing step, the signal is converted into a UART data frame; in the device action execution step, the lamp uses a PWM control method, and the motor is adjusted through UART signals; the master controller adjusts the communication parameters according to the feedback signal.

[0021] The operation process of the present invention is based on a modem module, an intelligent control system and its control method, and specifically includes the following steps: 1. System initialization Initialization of the master controller module: 1. After the master controller module is powered on, the MCU detects the status of the communication line, including the bus voltage and the node connection status.

[0022] 2. The master controller loads the control logic and performs an initial configuration of the control system (such as node address, device parameters, etc.) through keys, touch screens or preset instructions.

[0023] Initialization of the slave controller module: 1. After the slave controller module is powered on, the MCU reads the stored unique node address or waits for the master controller to assign an address.

[0024] 2. The slave controller detects the operating status of the devices (such as lamps or motors) connected to itself and waits for the control instructions from the master controller.

[0025] Startup of the modem module: 1. The modem module initializes the communication protocol, couples the low-voltage DC signal and the data signal, and prepares to receive or send communication data.

[0026] 2. Sending of control instructions Generation of control signals: 1. The master controller receives the user's operation instructions (such as dimming, starting / stopping of devices, etc.) through the touch screen or other key input devices.

[0027] 2. The master controller MCU converts the user instructions into communication data frames and sends them to the modem module.

[0028] Signal modulation and transmission: 1. The modem module embeds the control signal into the DC power signal through on-off keying modulation technology.

[0029] 2. The modulated signal is transmitted to the slave controller through the power line bus.

[0030] 3. Execution of control by the slave controller Receiving and parsing signals: 1. The modem module of the slave controller receives the modulated signal from the bus and converts it into a UART data frame through demodulation.

[0031] 2. The slave controller MCU parses the data frame and extracts the control commands for the target device.

[0032] Execution of device actions: 1. The slave controller performs operations on the target device according to the parsed control commands: 1. For lamps: adjust brightness, color temperature or start / stop; 2. For motors: control its start, stop, forward / reverse rotation or speed regulation.

[0033] 2. After the operation is completed, the slave controller feeds back the execution content to the master controller and monitors the status of the device in real time 4. Status feedback Generation of feedback signals: 1. The controller MCU encodes the device operation status (such as actions successfully executed, real-time monitored device status, etc.) into communication data frames and transmits them to the modem module.

[0034] Feedback signal transmission: 1. The modem module modulates the feedback data frame into the bus signal and sends it back to the master controller.

[0035] Master controller processes the feedback signal: 1. The master controller receives the feedback signal through the modem module and parses it.

[0036] 2. According to the feedback information, the master controller adjusts the control strategy (such as resending commands or updating device status).

[0037] 5. Dynamic adjustment and real-time control Dynamic node detection: 1. The system monitors the node connection status on the bus in real time. When a certain node is disconnected or fails, the master controller can automatically reconstruct the communication path or send an alarm.

[0038] Real-time adjustment of communication parameters: 1. According to the bus load and the delay of the feedback signal, the master controller adjusts the modulation depth, frequency or communication baud rate to improve the system stability.

[0039] Loop control: 1. The master controller continuously optimizes the instruction sending and device control processes based on user input and real-time feedback to form a closed-loop control.

[0040] 6. System shutdown Stop signal sending: 1. The user sends a system shutdown instruction through the touch screen. The master controller generates a control command to stop all devices and sends it to the slave controller.

[0041] Module shutdown: 1. The slave controller stops controlling the device, disconnects the communication after completing the status saving.

[0042] 2. The modem module stops signal modulation and demodulation and enters the low-power standby mode.

[0043] System power-off: 1. The master controller saves the system configuration and status data and completes the system power-off.

[0044] The above operation process describes the complete process from system initialization to shutdown, ensuring the efficient collaborative work among the modem module, the master controller and the slave controller. Through real-time feedback and dynamic adjustment, the present invention can adapt to complex control scenarios and improve the communication efficiency and the stability of device control.

[0045] The present invention provides a modem module, an intelligent control system and a control method based on DC low-voltage power line carrier. Through the optimized design of the technical solution, the following technical effects are achieved: Efficient integration of communication and power supply: Through the low-voltage power line communication module, control signals and power supply signals are transmitted on the same wire, which not only reduces the wiring cost and complexity, but also realizes the integrated design of communication and power supply. It is applicable to the low-voltage power supply environment of DC10 - 60V and has wide applicability in multiple scenarios such as smart home and industrial automation.

[0046] Reliability and expandability of multi-device communication: By adopting the modem module and through the optimized communication protocol and hardware design, stable communication of multi-node devices (supporting up to 256 nodes at most) is realized. Through the dynamic node detection function, the communication path can be automatically reconstructed when a node is disconnected or fails, improving the robustness and stability of the system.

[0047] Accuracy of real-time control and feedback: The collaborative work of the master controller and the slave controller realizes the real-time control of devices such as lamps and motors, including functions such as brightness adjustment, color temperature control, motor start / stop and speed adjustment. Through the real-time transmission of feedback signals, the master controller can dynamically adjust the control strategy to further optimize the system performance.

[0048] Improvement of system stability and anti-interference ability: The stabilizer module reduces the influence of power supply ripple and external electromagnetic interference on communication through the design of high-frequency filter capacitors and low-pass filter inductors, ensuring the stability of communication signals and the reliability of device operation. The low-voltage power line communication module is built with ESD protection and filtering protection circuits, effectively improving the anti-interference ability of the system.

[0049] Improvement of intelligence level: The system adopts a control architecture based on MCU. Through the division of labor and cooperation between the master controller and the slave controller, the intelligent management of multiple devices is realized. It supports users to flexibly configure the system through the touch screen interface or preset parameters, simplifying the operation process.

[0050] Optimization of energy conservation and cost-effectiveness: The use of power line carrier technology reduces the need for independent communication lines, reducing the overall wiring and installation costs. The low-power design of the system and the efficient communication modulation mechanism effectively reduce the energy consumption of system operation.

[0051] Application scenarios and advantages: Smart home field: Realize the intelligent adjustment of devices such as lighting control, curtain motors and drying racks, improving the convenience of the home and the user experience.

[0052] Industrial automation: Supports efficient communication and precise control for multiple nodes and devices, meeting the requirements of complex scenarios for industrial equipment.

[0053] Internet of Things applications: Provides reliable communication support for distributed Internet of Things devices through a low-cost wiring solution.

[0054] While solving the problems of the prior art, the present invention significantly improves the communication efficiency, stability, and scalability of the system, providing an efficient and reliable solution for the field of low-voltage power line communication. Brief Description of the Drawings

[0055] Figure 1 is a schematic structural diagram of the modem of the present invention; Figure 2 is the circuit diagram of the modem of the present invention; Figure 3 Schematic structural diagram of the intelligent control of the present invention; Figure 4 is the circuit diagram of the main controller of the present invention; Figure 5 is the circuit diagram of the lamp control slave controller of the present invention; Figure 6 is the circuit diagram of the motor control slave controller of the present invention.

[0056] Figure 4 The circuits in are too complex in wiring, and the wiring relationships are described as follows: 1. Main power supply and power supply part Main power supply input (DC+ and DC-): Connected to the input terminal of the voltage regulator module: Vin pin of VR1. The regulated 5V output is connected to the VCC bus of the system to supply power to the subsequent modules.

[0057] 2. PLC modem module: Input terminal (DC+ and DC- of P1 and P2): Connected to the main power line (BUS_P and BUS_N).

[0058] Output terminal (U2 - PLC modem chip): Data bus input: BUS_AI and BUS_BI are connected to the signal input pins of U2. Demodulation output: UART_TX and UART_RX of U2 are respectively connected to the TX and RX pins of the MCU for communication with the main control MCU.

[0059] Filtering components: Inductors (LP1, LP2) are connected in series on BUS_P and BUS_N to filter out bus noise. Capacitors (such as C4, C5) are connected in parallel on the bus to further smooth the bus voltage.

[0060] 3. Main Controller (MCU) Power Supply Pins (VCC and GND): VCC is connected to the 5V power supply, and GND is connected to the common ground.

[0061] UART Communication: RX and TX are respectively connected to UART_TX and UART_RX of PLC module U2.

[0062] PWM Output: The PWM output pins are connected to the control pins of the lamp driver chip (such as PWM_LED1, PWM_LED2).

[0063] Control Signal Input: 1. The function keys and switch button signals of the key interfaces (J3, J4, J5, J6) are connected to the GPIO pins of the MCU through resistors (such as R13 to R36).

[0064] 2. DI and RO of the RS485 interface chip (U7) are respectively connected to the TX and RX of the MCU to achieve communication with the touch screen.

[0065] 4. RS485 Communication Module Communication Chip (MAX485EESA): DI (Data Input) and RO (Data Output) are respectively connected to the TX and RX of the MCU. The A and B differential signal pins are connected to the RS485 bus for communication with the touch screen. DE and RE are used to control the communication direction, which is usually adjusted by the control pins of the MCU.

[0066] 5. Lamp Driver Module

[0067] PWM Signal Input: The PWM output pin of the MCU (such as PWM_LED1) is connected to the control input of the driver chip.

[0068] Power Supply and Protection: The VCC pin of the driver chip is connected to the 5V power supply. The driver output is connected to the positive and negative ends of the LED lamp through filter capacitors (such as C12, C13) and protection resistors (such as R7, R8).

[0069] 6. Motor Driver Module PWM Signal Input: The PWM output pin of the MCU (such as PWM_LED1) is connected to the control input of the driver chip.

[0070] Power Supply and Protection: The VCC pin of the driver chip is connected to the 5V power supply. The driver output is connected to the positive and negative ends of the LED motor through filter capacitors (such as C12, C13) and protection resistors (such as R7, R8).

[0071] 7. Bus and Expansion Interface Bus Connection: The BUS_P and BUS_N of the master controller are respectively connected to the bus input terminals of all slave controllers.

[0072] Expansion Interface: J3 to J6 provide multiple 8-pin interfaces. Each interface can be connected to a group of lamp or motor controllers, and the specific pin functions are identified by the assigned addresses. Detailed Implementation Manner

[0073] Embodiment 1: This embodiment is a DC low-voltage power line carrier modem module, including: A. Input Circuit: Connected to an external power supply, suitable for low-voltage power supply of DC10 - 60V; B. Coupling Circuit: Connected to the input circuit, used to couple data signals with DC power supply signals; C. Low-Voltage Power Line Communication Module: Connected to the coupling circuit, used to modulate and demodulate data signals; D. Output Circuit: Connected to the low-voltage power line communication module E. MCU: The MCU is connected to the low-voltage power line communication module and the output circuit, used to receive and process communication data.

[0074] Embodiment 2: The difference between this embodiment and Embodiment 1 is that this embodiment further includes the following features: The input circuit includes an LDO power chip and filter capacitors.

[0075] Preferably, the coupling circuit includes at least two coupling capacitors.

[0076] Preferably, the low-voltage power line communication module supports multi-device communication.

[0077] Preferably, the output circuit includes a zener diode and a filter inductor.

[0078] Embodiment 3: This embodiment is an intelligent control system based on a DC low-voltage power line carrier modem. Its technical solution is as follows, including: A master controller, which includes a first modem, a power module, and a micro control unit MCU, used to generate control signals, modulate the control signals into power line carrier signals through the first modem, and send them to the power line; Slave controller, the slave controller includes a second modem and an electrical appliance control interface, the second modem is used to receive the power carrier signal in the power line and demodulate it into a control signal, and the electrical appliance control interface adjusts the electrical appliance according to the demodulated control signal; Power supply module, which provides stable power supply for the master controller and the slave controller, and supports low-voltage power supply of DC10-60V; Power line, which is used to connect the master controller and the slave controller, and transmit power signals and power carrier signals.

[0079] Embodiment 4: The difference between this embodiment and Embodiment 3 is that this embodiment further includes the following features: 1. The master controller module includes a function key interface and an RS-485 color touch screen interface; 2. The slave controller module includes an address recognition function; 3. The stabilizer module filters out interference signals through high-frequency filter capacitors and low-pass filter inductors; 4. The communication architecture supports the dynamic node detection function; 5. The control device supports PWM dimming; 6. Both the master controller and the slave controller include an MCU.

[0080] Embodiment 5: This embodiment is an intelligent control method based on a DC low-voltage power line carrier modem, including the following steps: Modulation signal generation: The master controller modulates the control signal into a high-frequency signal through the modulation module and superimposes it on the power signal; Signal transmission: Transmit the control signal and the power signal to the bus through the DC low-voltage power line carrier; Signal parsing: The slave controller parses the bus signal through the demodulation module and generates a control command; Device action execution: The slave controller performs operations on the device according to the control command; Feedback signal transmission: The slave controller feeds back the execution status to the master controller through the modem.

[0081] Preferably, it further includes: adopting on-off keying modulation technology in the modulation signal generation step; adopting a daisy-chain topology structure in the signal transmission step; in the signal parsing step, the signal is converted into a UART data frame; in the device action execution step, the lamp adopts a PWM control method, and the motor is adjusted through UART signals; the master controller adjusts the communication parameters according to the feedback signal.

Claims

1. A direct current low-voltage power line carrier modem module, characterized in that, Comprising: A. Input circuit: Connected to an external power supply, suitable for low-voltage power supply of DC 10 - 60V; B. Coupling circuit: Connected to the input circuit, used for coupling data signals and DC power supply signals; C. Low-voltage power line communication module: Connected to the coupling circuit, used for modulating and demodulating data signals; D. Output circuit: Connected to the low-voltage power line communication module E. MCU: The MCU is connected to the low-voltage power line communication module and the output circuit, used for receiving and processing communication data.

2. The DC low-voltage power line carrier modem module according to claim 1, characterized in that The input circuit includes an LDO power chip and filter capacitors.

3. The DC low-voltage power line carrier modem module according to claim 1, characterized in that The coupling circuit includes at least two coupling capacitors.

4. The DC low-voltage power line carrier modem module according to claim 1, wherein The low-voltage power line communication module supports multi-device communication.

5. The DC low-voltage power line carrier modem module according to claim 1, characterized in that The output circuit includes a zener diode and a filter inductor.

6. An intelligent control system for a DC low-voltage power line carrier modem according to any one of the above claims 1-6, characterized in that, Comprising: A master controller, which includes a first modem, a power supply module, and a micro-control unit MCU, used for generating control signals, modulating the control signals into power carrier signals through the first modem, and sending them to the power line; A slave controller, which includes a second modem and an electrical control interface. The second modem is used for receiving the power carrier signals in the power line and demodulating them into control signals. The electrical control interface adjusts the electrical appliances according to the demodulated control signals; A power supply module, which provides a stable power supply for the master controller and the slave controller, and supports low-voltage power supply of DC 10 - 60V; A power line, which is used to connect the master controller and the slave controller, and transmit power signals and power carrier signals.

7. The intelligent control system based on a DC low-voltage power carrier modem according to claim 6, characterized in that: 1). The master controller module includes a function key interface and an RS-485 color touch screen interface; 2). The slave controller module includes an address recognition function; 3). The stabilizer module filters out interference signals through high-frequency filter capacitors and low-pass filter inductors; 4). The communication architecture supports a dynamic node detection function; 5). The control device supports PWM dimming; 6). Both the master controller and the slave controller include an MCU.

8. An intelligent control method for a DC low-voltage power line carrier modem according to any one of claims 1-6, characterized in that, Including the following steps: Modulation signal generation: The master controller modulates the control signal into a high-frequency signal through a modulation module and superimposes it on the power supply signal; Signal transmission: Transmit the control signal and the power supply signal to the bus through DC low-voltage power carrier; Signal parsing: The slave controller parses the bus signal through a demodulation module and generates a control command; Device action execution: The slave controller executes operations on the device according to the control command; Feedback signal transmission: The slave controller feeds back the execution status to the master controller through the modem.

9. The intelligent control method according to claim 12, wherein: In the modulation signal generation step, on-off keying modulation technology is adopted; in the signal transmission step, a daisy-chain topology structure is adopted; in the signal parsing step, the signal is converted into a UART data frame; in the device action execution step, the lamp adopts a PWM control method, and the motor is adjusted through UART signals; the master controller adjusts the communication parameters according to the feedback signal.

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