Intelligent power line carrier communication system

Abstract

The invention relates to a power line carrier communication system, the system comprises a sending end module, a receiving end module and a channel adjusting module which are connected in sequence, the sending end module is used for converting a data signal into a carrier signal and transmitting the carrier signal through a power line; the receiving end module comprises a demodulation system, and the demodulation system is in communication connection with the transmitting end module through a power line and receives and demodulates the carrier signal to recover the carrier signal into a data signal; the channel adjusting module is connected with the transmitting end module, is in communication connection with the receiving end module through the transmitting end module, and is used for dynamically adjusting parameters of carrier signals according to channel characteristics of the power line; the power line carrier communication method comprises the steps of data signal processing, channel monitoring, channel adjustment and carrier signal transmission. According to the power line carrier communication system and the communication method, the stability, the transmission rate and the anti-interference capability of power line carrier communication are improved, the overall performance of communication is effectively improved, and the power line carrier communication system and the communication method are suitable for various application scenes such as intelligent power grids and the Internet of Things.

Description

Technical Field

[0001] The present invention relates to the field of marine navigation radar image and signal processing, and in particular to an intelligent power carrier communication system. Background Art

[0002] Power line carrier communication (PLC) technology utilizes existing power lines for data transmission and has been researched and applied since the early 20th century. With the rapid development of technologies such as smart grids, smart homes, and remote monitoring, PLC has attracted widespread attention due to its advantages, such as eliminating the need for new communication lines and leveraging existing power infrastructure. This technology transmits data and control signals over power lines, enabling functions such as appliance management, energy consumption monitoring, automatic meter reading, and remote control.

[0003] Power line carrier communication technology was initially used for simple remote control and telemetry applications. Key challenges include the complexity of the power line environment, high noise levels, and low bandwidth utilization. Power lines are designed for power transmission, not data transmission. Consequently, high-frequency signals are subject to various interference and attenuation conditions. Traditional power line carrier systems typically offer only low data transmission speeds and are limited by short transmission distances and high bit error rates.

[0004] To address these issues, researchers and engineers have developed a variety of improved technologies, such as orthogonal frequency division multiplexing (OFDM) and various adaptive modulation techniques, which can improve signal transmission quality and system interference resistance. Furthermore, modern power carrier communication technology has introduced advanced error detection and correction algorithms, significantly improving communication reliability. However, even with this, power carrier communication systems still face issues such as channel bandwidth limitations, device compatibility, and system interoperability. Regarding channel regulation, due to the unstable nature of power lines, power carrier systems require frequent adjustments to signal parameters, such as power output and carrier frequency, to adapt to varying channel conditions and interference environments. This requires the system to not only monitor the environment in real time but also to be able to quickly and effectively adjust communication strategies. Currently, although many types of power carrier equipment have begun to adopt adaptive technologies, most devices are still inefficient in handling high-dynamic range channel variations.

[0005] Furthermore, with the development of the Internet of Things (IoT), the demands on power line carrier communication systems have become increasingly complex and diverse. IoT applications typically require low power consumption, high reliability, and wide coverage, posing new challenges for power line carrier communication technology. For example, in a smart home, dozens or even hundreds of devices may need to connect and communicate via power line carrier technology, requiring the communication system to not only have high capacity but also excellent network management and data security features. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a novel power line carrier communication system. Through technological innovation, the power line carrier communication system of the present invention is to provide higher data transmission rates, better signal stability, and stronger anti-interference capabilities. It is required to achieve a high degree of integration and modularization to facilitate system control and subsequent maintenance. It is also required to not only improve the overall performance of power line carrier communication but also expand its application in smart grids, urban infrastructure management, and a wide range of Internet of Things applications.

[0007] In order to achieve the above-mentioned invention purpose, the technical solution provided by the present invention is as follows:

[0008] An intelligent power carrier communication system comprises a transmitting end module, a receiving end module and a channel adjustment module connected in sequence, wherein:

[0009] The transmitting end module is used to convert the data signal into a carrier signal and transmit it through the power line;

[0010] The receiving end module includes a demodulation system, which is connected to the transmitting end module via power line communication, receives and demodulates the carrier signal to restore it to a data signal;

[0011] The channel adjustment module is connected to the transmitting end module and is in communication with the receiving end module through the transmitting end module, and is used to dynamically adjust the parameters of the carrier signal according to the channel characteristics of the power line.

[0012] In an intelligent power line carrier communication system of the present invention, the transmitting end module includes a data encoder, a modulation unit and an adaptive algorithm module. The data encoder is responsible for converting the input original data signal into a format suitable for power line transmission. The modulation unit adopts a modulation technology suitable for the characteristics of the power line to modulate the encoded data signal onto the power carrier. The adaptive algorithm module dynamically adjusts the modulation parameters of the signal according to the instantaneous state of the power line. The modulation parameters include modulation depth and transmission power.

[0013] In an intelligent power carrier communication system of the present invention, further, the format suitable for power line transmission includes MAC FRAME, which can be understood as an abstract unit in which time is divided into channels for use and is managed in an overclocking manner. Each overclocking contains 32 frames, and each frame is marked with a sequence number in the superframe during the networking and data transmission process to achieve frame synchronization of each node in the networking; modulation technologies suitable for power line characteristics include OFDM and FSK, OFDM is orthogonal frequency division multiplexing, FSK is frequency shift keying, OFDM is a multi-carrier modulation technology, and FSK is a digital modulation method. If OFDM and FSK are used in combination, data transmission in a wireless communication system can be achieved.

[0014] In an intelligent power carrier communication system of the present invention, the receiving end module includes a demodulator, a decoder and an error detection system. The demodulator receives a carrier signal and extracts a modulated data signal from it to demodulate the modulated data signal. The demodulation process needs to match the modulation mode of the transmitting end module. The decoder converts the demodulated signal back into the original data format. The error detection system uses technologies including cyclic redundancy check for detection and uses the same error detection and correction algorithm as the transmitting end module to correct possible transmission errors.

[0015] In an intelligent power carrier communication system of the present invention, the channel adjustment module includes a frequency selection unit, a power selection unit and a monitoring unit. The frequency selection unit selects the optimal transmission frequency according to the noise level and interference condition of the channel. The power control unit adjusts the transmission power according to the attenuation and load conditions of the channel so that the signal can effectively cover the required distance. The monitoring unit continuously collects status data in the channel, including interference and signal-to-noise ratio, to provide decision support for the adaptive algorithm of the transmitting end module.

[0016] In an intelligent power carrier communication system of the present invention, further, the transmitting end module, the receiving end module and the channel adjustment module all include a control panel module, and the control panel module includes a power supply module for power supply, an IO module for signal transmission, a communication module for communication and a controller module.

[0017] In an intelligent power carrier communication system of the present invention, further, the channel adjustment module further includes a display interaction unit, and the display interaction unit is used to display channel status information and perform user interaction.

[0018] In an intelligent power carrier communication system of the present invention, each of the channel adjustment modules includes two identical and completely isolated frequency selection units and power control units, and each set of frequency selection units and power control units includes an independent control unit and power supply unit.

[0019] In an intelligent power carrier communication system of the present invention, the frequency selection unit and the power control unit in the channel adjustment module are both correspondingly arranged on the transmitting end module, and the frequency selection unit and the power control unit are independent of each other.

[0020] In an intelligent power carrier communication system of the present invention, as a complete system with a wider coverage, in order to adapt to the multi-path nature of the power line, the receiving end module is provided with multiple, respectively serving as a front-end receiving station, a relay receiving station and a main control room receiving station. The front-end receiving station and the relay receiving station are respectively communicated with the main control room receiving station.

[0021] In an intelligent power carrier communication system of the present invention, further, two groups of transmitting end modules and two groups of channel adjustment modules are provided in the system, the two groups of transmitting end modules communicate with one group of channel adjustment modules respectively, the front-end receiving station and the relay receiving station are respectively communicated with the two groups of channel adjustment modules, and the main control room receiving station in the receiving end module independently controls the front-end receiving station and the relay receiving station through the communication unit.

[0022] In an intelligent power carrier communication system of the present invention, in order to enrich the functions of the entire system and ensure safety, an alarm system is provided in each receiving end module. The alarm system is provided with a monitoring submodule and a communication submodule. The alarm system monitors and responds to abnormal channel status through the monitoring submodule, and sends alarm information to the main control room through the communication submodule.

[0023] In an intelligent power carrier communication system of the present invention, in order to facilitate centralized control, a control station subsystem is also designed. The control station subsystem includes a sending end control station, a receiving end control station, a channel regulation control station and a central control station. The sending end control station, the receiving end control station and the channel regulation control station are respectively communicated with the central control station. The sending end control station is connected to and controls the sending end module to realize the sending operation of the power carrier. The receiving end control station is connected to the receiving end module to perform the receiving operation of the power carrier. The channel regulation control station is connected to and controls the channel regulation module to realize the regulation operation of the power carrier. The central control station controls the sending end control station, the receiving end control station and the channel regulation control station respectively to realize system maintenance in case of failure.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The intelligent power carrier communication system of the present invention achieves significant performance improvements and operational convenience through its highly integrated and modular design. The system's dynamic channel adjustment module enables it to adapt to changes in power lines in real time and dynamically adjust signal parameters such as frequency and power, greatly improving signal transmission stability and anti-interference capabilities. This enables the system to maintain high-efficiency and high-reliability communication even in complex power environments.

[0026] 2. An independent frequency selection unit and power control unit are designed in the intelligent power carrier communication system of the present invention to provide flexibility for the system in the channel control module, support precise control and rapid response to external changes, and further improve the adaptability and stable operation of the network.

[0027] 3. The power line carrier communication system of the present invention is not only suitable for smart grids and home automation, but can also meet the needs of a wider range of industrial applications, providing users with a more reliable and efficient data transmission solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall architecture of an intelligent power line carrier communication system of the present invention.

[0029] Figure 2 It is a schematic diagram of a transmitting end module in an intelligent power carrier communication system of the present invention.

[0030] Figure 3 This is a system schematic diagram of a receiving end module in an intelligent power carrier communication system of the present invention.

[0031] Figure 4 This is a system schematic diagram of a channel adjustment module in an intelligent power carrier communication system of the present invention. DETAILED DESCRIPTION

[0032] Below we further elaborate on the technical solution of the present invention in combination with the accompanying drawings and specific embodiments, in order to more clearly understand its operating principles and workflow, but this does not limit the scope of protection of the present invention.

[0033] Power line carrier communication (PLC) technology uses power lines as a transmission medium to transmit data and information. This technology is primarily used in smart grid management, home automation, remote control, and monitoring systems. Traditional PLC communication faces numerous challenges, including signal attenuation, noise interference, and channel variability, all of which can degrade communication quality and reliability.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment is an intelligent power carrier communication system, which comprises a transmitting end module, a receiving end module and a channel adjustment module connected in sequence, wherein:

[0036] The transmitting end module is used to convert the data signal into a carrier signal and transmit it through the power line;

[0037] The receiving end module includes a demodulation system, which is connected to the transmitting end module via power line communication, receives and demodulates the carrier signal to restore it to a data signal;

[0038] The channel adjustment module is connected to the transmitting end module and is in communication with the receiving end module through the transmitting end module, and is used to dynamically adjust the parameters of the carrier signal according to the channel characteristics of the power line.

[0039] In the intelligent power carrier communication system, such as Figure 2 As shown, the transmitting module includes a data encoder, a modulation unit, and an adaptive algorithm module. The data encoder is responsible for converting the input raw data signal into a format suitable for power line transmission. This usually involves error detection and error correction coding to improve the robustness of the signal in noisy environments. The modulation unit uses a modulation technique suitable for the characteristics of the power line to modulate the encoded data signal onto the power carrier. The adaptive algorithm module dynamically adjusts the signal modulation parameters based on the current state of the power line. These modulation parameters include modulation depth and transmission power to optimize transmission efficiency and quality.

[0040] The formats suitable for power line transmission include MAC FRAME. MAC FRAME can be understood as an abstract unit of time divided into channels and managed in a superframe manner. Each superframe contains 32 frames. During networking and data transmission, each frame is marked with a sequence number within the superframe to achieve frame synchronization among all nodes in the network. Modulation technologies suitable for power line characteristics include OFDM and FSK. OFDM is orthogonal frequency division multiplexing, and FSK is frequency shift keying. OFDM is a multi-carrier modulation technology, and FSK is a digital modulation method. If OFDM and FSK are used together, data transmission in wireless communication systems can be achieved.

[0041] like Figure 3 As shown, the receiving module includes a demodulator, a decoder, and an error detection system. The demodulator receives a carrier signal and extracts the modulated data signal from it to demodulate the modulated data signal. The demodulation process must match the modulation method of the transmitting module. The decoder converts the demodulated signal back into the original data format and uses the same error detection and correction algorithms as the transmitting module to correct possible transmission errors. The error detection system uses technologies such as cyclic redundancy checking (CRC) to ensure data integrity and accuracy. CRC, also known as cyclic redundancy check (CRC), is a hash function that generates a short, fixed-bit checksum based on data such as online packets or computer files. It is primarily used to detect or verify errors that may occur during data transmission or storage. This method was published by W. Wesley Peterson in 1961.

[0042] like Figure 4As shown, the channel adjustment module includes a frequency selection unit, a power selection unit, and a monitoring unit. The frequency selection unit selects the optimal transmission frequency based on the channel's noise level and interference conditions. The power control unit adjusts the transmit power based on the channel's attenuation and load conditions to ensure that the signal effectively covers the required distance. The monitoring unit continuously collects channel status data, including interference and signal-to-noise ratio, to provide decision support for the transmitter module's adaptive algorithm. The core function of the channel adjustment module is to monitor power line channel conditions in real time and adjust transmission parameters accordingly to adapt to changing network conditions. The frequency selection unit selects the optimal transmission frequency based on the channel's noise level and interference conditions. The power control unit adjusts the transmit power based on the channel's attenuation and load conditions to ensure that the signal effectively covers the required distance while avoiding interference caused by over-amplification. Furthermore, the monitoring unit continuously collects channel status data, such as interference and signal-to-noise ratio, to provide decision support for the adaptive algorithm. Self-adaptation refers to the process of automatically adjusting the processing method, processing sequence, processing parameters, boundary conditions, or constraints based on the data characteristics of the processed data during processing and analysis, adapting them to the statistical distribution and structural characteristics of the processed data to achieve optimal processing results. The optimal criteria used by the adaptive algorithm include the minimum mean square error (LMS) criterion, the least squares (LS) criterion, the maximum signal-to-noise ratio criterion and the statistical detection criterion. Among them, the minimum mean square error (LMS) criterion and the least squares (LS) criterion are currently the most popular adaptive algorithm criteria and are also the existing technology.

[0043] The transmitting end module, the receiving end module and the channel adjustment module all include a control panel module, and the control panel module includes a power supply module for power supply, an IO module for signal transmission, a communication module for communication and a controller module.

[0044] Furthermore, the channel adjustment module further includes a display interaction unit, which is used to display channel status information and perform user interaction.

[0045] Each channel adjustment module includes two identical and completely isolated frequency selection units and power control units, each of which includes an independent control unit and power supply unit. The frequency selection units and power control units in the channel adjustment module are both correspondingly disposed on the transmitting end module, and the frequency selection units and power control units are independent of each other.

[0046] Example 2

[0047] As a complete system with a wide coverage, in order to adapt to the multi-path nature of the power lines, the receiving end modules are provided with multiple ones, serving as the front-end receiving station, the relay receiving station and the main control room receiving station respectively. The front-end receiving station and the relay receiving station are respectively communicated with the main control room receiving station.

[0048] Furthermore, the system is provided with two groups of sending end modules and two groups of channel adjustment modules. The two groups of sending end modules communicate with one group of channel adjustment modules respectively. The front-end receiving station and the relay receiving station are respectively communicated with the two groups of channel adjustment modules. The main control room receiving station in the receiving end module independently controls the front-end receiving station and the relay receiving station through the communication unit.

[0049] In order to enrich the functions of the entire system and ensure safety, an alarm system is installed in each receiving end module. The alarm system is equipped with a monitoring sub-module and a communication sub-module. The alarm system monitors and responds to channel status abnormalities through the monitoring sub-module, and sends alarm information to the main control room through the communication sub-module.

[0050] Furthermore, in order to facilitate centralized control, a control station subsystem is also designed. The control station subsystem includes a sending end control station, a receiving end control station, a channel regulation control station and a central control station. The sending end control station, the receiving end control station and the channel regulation control station are respectively communicated with the central control station. The sending end control station is connected to and controls the sending end module to realize the sending operation of the power carrier. The receiving end control station is connected to the receiving end module to perform the receiving operation of the power carrier. The channel regulation control station is connected to and controls the channel regulation module to realize the regulation operation of the power carrier. The central control station controls the sending end control station, the receiving end control station and the channel regulation control station respectively to realize system maintenance in case of failure.

[0051] The transmission system and channel adjustment system in the power carrier communication system are both installed in the main control box. The channel adjustment system transmits channel status information to the transmission system main controller via redundant serial ports, Ethernet, CAN network, or hard lines, and ultimately communicates with the control station of the transmission system main controller. Each control station consists of a controller, touch screen, illuminated buttons, and a buzzer. The joysticks at different control positions transmit the set values ​​to the main controller via analog signal lines. The channel adjustment system's buzzers and light indicators are also distributed among the control stations. Locally eliminating channel anomaly alarm signals at the transmission control station prevents the generation of channel anomaly alarm signals at the receiving control station and the channel adjustment control station. In addition, the transmission system, channel adjustment system, and alarm system are independent of each other, and a failure in any one system will not affect the others.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. An intelligent power carrier communication system, characterized in that: The system consists of a transmitting module, a receiving module and a channel adjustment module connected in sequence, wherein: The transmitting end module is used to convert the data signal into a carrier signal and transmit it through the power line; The receiving end module includes a demodulation system, which is connected to the transmitting end module via power line communication, receives and demodulates the carrier signal to restore it to a data signal; The channel adjustment module is connected to the transmitting end module and is in communication connection with the receiving end module through the transmitting end module, and is used for dynamically adjusting the parameters of the carrier signal according to the channel characteristics of the power line.

2. The intelligent power carrier communication system according to claim 1, characterized in that: The transmitting end module includes a data encoder, a modulation unit and an adaptive algorithm module. The data encoder is responsible for converting the input original data signal into a format suitable for power line transmission. The modulation unit adopts a modulation technology suitable for the characteristics of the power line to modulate the encoded data signal onto the power carrier. The adaptive algorithm module dynamically adjusts the modulation parameters of the signal according to the instantaneous state of the power line. The modulation parameters include modulation depth and transmission power.

3. The intelligent power carrier communication system according to claim 2, characterized in that: Formats suitable for power line transmission include MAC FRAME; modulation technologies suitable for power line characteristics include OFDM and FSK.

4. The intelligent power carrier communication system according to claim 2, characterized in that: The receiving end module includes a demodulator, a decoder and an error detection system. The demodulator receives a carrier signal and extracts a modulated data signal from it to demodulate the modulated data signal. The demodulation process needs to match the modulation method of the transmitting end module. The decoder reconverts the demodulated signal into the original data format. The error detection system uses technologies including cyclic redundancy check for detection and uses the same error detection and correction algorithm as the transmitting end module to correct possible transmission errors.

5. The intelligent power carrier communication system according to claim 4, characterized in that: The channel adjustment module includes a frequency selection unit, a power selection unit and a monitoring unit. The frequency selection unit selects the optimal transmission frequency according to the noise level and interference condition of the channel. The power control unit adjusts the transmission power according to the attenuation and load conditions of the channel so that the signal can effectively cover the required distance. The monitoring unit continuously collects status data including interference and signal-to-noise ratio in the channel to provide decision support for the adaptive algorithm of the transmitting end module.

6. The intelligent power carrier communication system according to claim 5, characterized in that: The transmitting end module, the receiving end module and the channel adjustment module all include a control panel module, and the control panel module includes a power module for power supply, an IO module for signal transmission, a communication module for communication and a controller module.

7. The intelligent power carrier communication system according to claim 6, characterized in that: The channel adjustment module further includes a display interaction unit, and the display interaction unit is used to display channel status information and perform user interaction.

8. The intelligent power carrier communication system according to claim 1, characterized in that: Each of the channel adjustment modules includes two sets of identical and completely isolated frequency selection units and power control units, and each set of frequency selection units and power control units includes an independent control unit and power supply unit.

9. The intelligent power carrier communication system according to claim 8, characterized in that: The frequency selection unit and the power control unit in the channel adjustment module are both correspondingly arranged on the transmitting end module, and the frequency selection unit and the power control unit are independent of each other.

10. The intelligent power carrier communication system according to claim 1, characterized in that: There are multiple receiving end modules, which serve as a front-end receiving station, a relay receiving station and a main control room receiving station respectively. The front-end receiving station and the relay receiving station are respectively connected to the main control room receiving station for communication.

11. The intelligent power carrier communication system according to claim 10, characterized in that: Two groups of sending end modules and two groups of channel adjustment modules are provided. The two groups of sending end modules communicate with one group of channel adjustment modules respectively. The front-end receiving station and the relay receiving station are respectively communicated and connected with the two groups of channel adjustment modules. The main control room receiving station in the receiving end module independently controls the front-end receiving station and the relay receiving station through the communication unit.

12. The intelligent power carrier communication system according to claim 10, characterized in that: An alarm system is provided in each receiving end module. The alarm system is provided with a monitoring submodule and a communication submodule. The alarm system monitors and responds to abnormal channel status through the monitoring submodule, and sends alarm information to the main control room through the communication submodule.

13. The intelligent power carrier communication system according to claim 1, characterized in that: It also includes a control station system, which includes a sending end control station, a receiving end control station, a channel regulation control station and a central control station. The sending end control station, the receiving end control station and the channel regulation control station are respectively connected to the central control station for communication. The sending end control station is connected to and controls the sending end module to realize the sending operation of the power carrier. The receiving end control station is connected to the receiving end module to perform the receiving operation of the power carrier. The channel regulation control station is connected to and controls the channel regulation module to realize the regulation operation of the power carrier. The central control station controls the sending end control station, the receiving end control station and the channel regulation control station respectively to realize system maintenance in case of failure.

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