19 results about "Power line network" patented technology

The invention relates to a power line network topology estimation method and device and computer equipment. The method comprises the following steps: sending a modulation signal, and receiving a plurality of reflection signals corresponding to the modulation signal; determining a path length set and a current topological structure according to the signal propagation time corresponding to each reflected signal; the signal propagation time is a time difference between the sending time of the modulation signal and the receiving time of the reflection signal; selecting an expansion node from the current topological structure, and updating the current topological structure according to the expansion node and the path length set; the extension nodes are unselected nodes in the current topological structure. According to the topology estimation method, the complexity and cost of system deployment are reduced through a single modem implementation method, the topology structure is updated by analyzing the expansion nodes, dynamic network changes are supported, the applicability of the topology estimation method is improved, and the efficiency of topology network management and maintenance is improved.

The invention relates to a power line network unknown port and branch discovery method and device and computer equipment. The method comprises the following steps: determining the number of unknown ports on a target line and the corresponding branch length according to the frequency response of a sweep frequency signal between a transformer substation and a target communication node; according to the frequency response of the sweep frequency signal, determining multipath parameters from the transformer station to the self-transmitting and self-receiving and from the transformer station to the target communication node; determining a first port closest to the substation according to the multipath parameter and the branch length, and determining a multipath channel response caused by the first port; and updating the frequency response of the sweep frequency signal according to the multipath channel response, and re-determining a first port closest to the transformer substation according to the updated frequency response of the sweep frequency signal until the number of unknown ports on the target line is zero. By adopting the method, the power line network topology can be accurately constructed.

This invention provides a power line carrier intelligent distribution network method, device, and handheld terminal. The distribution network method includes the following processes: S1, network discovery to obtain a list of all node IDs; S2, synchronous broadcast phase, the master control node polls and broadcasts; S3, node execution process: when acting as a broadcast source, it sends a probe signal; when acting as a listener, it records the signal quality to a local list; S4, distributed voting, where each node autonomously selects the node with the best signal as the cluster head; S5, cluster head reporting, where all nodes report the selected cluster head ID to the master control; S6, global decision, where the master control counts all reported cluster head IDs and announces the node with the most votes as the final gateway. This invention utilizes the existing power line network as a data transmission carrier, automatically senses the line environment, and adaptively forms a network. Simultaneously, through point-to-point NFC interaction between the handheld terminal and the device, it achieves zero-configuration, accurate, and reliable parameter writing and identity authentication.

The invention relates to the technical field of power line carrier, in particular to a voice broadcast module based on power line carrier, which comprises a power line carrier host deployed in a gas station business room, the power line carrier host comprises a main control unit, a network communication unit, a power line carrier modulation unit and a power supply unit; the at least one power line carrier voice playing board is installed in the oiling machine, and the power line carrier voice playing board comprises a slave control unit, a power line carrier demodulation unit, a voice synthesis unit, an audio amplification unit, a bit number configuration unit, a power line network and a power supply unit; through cooperative work of the power line carrier host and the power line carrier voice playing board, millisecond-level directional transmission of payment result information in an explosion-proof environment of a gas station is achieved, voice is played through a built-in loudspeaker of the refueling machine, for example, the payment success of a No.3 refueling machine is 200 yuan, a pump island watch man can accurately obtain the payment state in real time, and the service life of the pump island is prolonged. Therefore, the risk of order escape caused by information delay of the business room and the refueling island is thoroughly eliminated.

The present application provides a method for realizing covert information transmission in a power line network, comprising the following steps: a transmitter prepares covert information to be transmitted to a receiver; the transmitter uses a determined transmission power to send the covert information to the receiver via the power line network; while receiving the transmitter signal, the receiver generates and transmits artificial noise to interfere with the eavesdropper's monitoring; the eavesdropper's false detection probability is evaluated to ensure that the eavesdropper cannot accurately determine whether the transmitter is transmitting information; on the premise of meeting the concealment requirements, the transmitter and receiver maximize the receiver's covert information reception rate by adjusting the transmission power; the covert interruption probability when the receiver receives the signal is analyzed and the concealment is evaluated, and based on the analysis and evaluation results, the system parameters are adjusted to optimize the covert transmission performance; the receiver decodes the received signal to recover the covert information sent by the transmitter; and the integrity and accuracy of the information received by the receiver are verified.

The invention discloses a 5G ship confined space communication system and method, and the system comprises a 5G signal access unit, a power line communication unit and a cabin terminal communication module, the 5G signal access unit is disposed on a deck, receives a private network 5G signal through a 5G CPE, converts the 5G signal into IP data, accesses the ship power line communication unit through a gateway, and communicates with the cabin terminal communication module through the power line communication unit. The power line communication unit modulates IP data into high-frequency signals and superposes the high-frequency signals on a power line by using an original alternating-current power supply system of a ship, the cabin terminal communication modules are deployed in cabins, receive signals of the power line communication unit and restore the signals into standard IP data, and the standard IP data are used by terminal equipment through local area WiFi, so that 5G service access in cabins is realized; according to the 5G ship confined space communication system, the original power line network of the ship serves as an information transmission medium, 5G signals are transmitted to all cabins in the ship from the deck, efficient and reliable communication coverage is achieved, and the 5G ship confined space communication system is suitable for various application scenes such as intelligent ships, remote monitoring and Internet of Things equipment connection.

The present application discloses a low-voltage user current-leakage localization method and apparatus, and a storage medium. The method comprises: performing clock synchronization processing on terminal devices mounted at ports in a power line network; calculating propagation delays between the ports on the basis of information collected by the terminal devices; using the calculated propagation delays between the ports in the power line network to calculate propagation distances between the ports; transmitting the propagation distances between the ports to a master node; the master node using the propagation distances between the ports to determine a unique tree topology network structure, so as to construct a power line topology based on an end-to-end delay; and using the constructed power line topology and an electromagnetic time reversal technology to localize a plurality of indoor current-leakage points, so as to implement multi-port collaborative time reversal-based current-leakage localization. In the present application, a power line carrier is used to implement topology construction of a low-voltage line network, and a current-leakage fault is sensed and localized. The present application can be widely used in the field of current-leakage localization.

The invention relates to a power line communication network topology reconstruction method and device for single-port missing. The method comprises the following steps: receiving and transmitting a preset detection signal through a plurality of known tail ports in a power line network, determining the distance between the plurality of known tail ports according to a signal transmission moment and a signal first arrival moment, and constructing an initial topology network according to the distance; receiving and transmitting virtual signals through a plurality of virtual ports of the initial topology network, and determining the position of an unknown branch point according to the signal difference between a real signal and the virtual signals; receiving and transmitting virtual swept-frequency signals through a plurality of known tail ports and a plurality of virtual ports, and determining an unknown branch length according to a signal difference between a real swept-frequency signal and the virtual swept-frequency signal; and updating the initial topology network according to the position of the unknown branch point and the unknown branch length to obtain the topology network of the power line network. The power line communication network topology can be accurately reconstructed under the condition of single-port missing.

The application provides a data transmission method and device and a storage medium, relates to the technical field of communication, and is used for solving the problem of high cost of data transmission in general technology. The method can be applied to a target node. The target node is any node in a power line network. The method comprises the following steps: in the process of obtaining target data, the target node can obtain a data packet transmitted by a neighboring node through a power line. The data packet comprises to-be-transmitted data and routing information. When the routing information meets a preset routing rule, the target node determines the to-be-transmitted data as the target data.

This application relates to a method and apparatus for topology reconstruction of power line communication networks with a single port missing. The method includes: transmitting and receiving preset detection signals through multiple known end ports in the power line network; determining the distance between the known end ports based on the signal transmission time and the signal arrival time; and constructing an initial topology network based on the distance; transmitting and receiving virtual signals through multiple virtual ports in the initial topology network; determining the location of unknown branch points based on the signal difference between the real and virtual signals; transmitting and receiving virtual frequency sweep signals through the multiple known end ports and multiple virtual ports respectively; determining the length of unknown branches based on the signal difference between the real and virtual frequency sweep signals; and updating the initial topology network based on the location and length of the unknown branch points to obtain the power line network topology. This method can accurately reconstruct the topology of a power line communication network under conditions of a single port missing.

The invention provides a ship navigation signal lamp control system and method, and belongs to the technical field of ship electrical control, and the system comprises a control unit which is used for determining the navigation state of a ship, and generating a control instruction of a target lamp combination according to a pre-stored collision avoidance rule mapping table; the adaptive communication unit is connected to the control unit and a power line network of the ship, and is used for selecting a target power line carrier modulation mode according to the communication quality parameters of the power line network, and transmitting a control instruction through the power line network based on the target power line carrier modulation mode; the at least one intelligent lamp terminal is in communication connection with the self-adaptive communication unit and the control unit through a power line network and is used for receiving and executing the control instruction through the power line network, detecting state information of the corresponding lamp in real time and feeding back the state information to the control unit through the power line network; wiring simplification, intelligent control and state monitoring can be considered, and the ship navigation safety and maintenance efficiency are improved.

The invention discloses a dynamic address allocation method for a power line carrier communication network, and the method comprises the steps: obtaining an impedance feature code corresponding to an electrical line connected with a terminal device when the terminal device is connected to a power line network, and generating a unique power line identity recognition code as an address seed; the terminal equipment performs communication negotiation with other nodes in the network by using the address seed, and obtains a network layer address through a negotiation process containing a conflict avoidance mechanism; monitoring the state of the allocated network layer address, starting a multi-stage verification and recovery process after detecting that the equipment corresponding to the address is offline, and updating the address state for reallocation; according to the method, the uniqueness and safety of address allocation are improved by utilizing the physical layer feature code, the allocation success rate is improved through an improved conflict avoidance mechanism, and the utilization efficiency of an address pool and the dynamic stability of a network are improved by adopting designed address life cycle management.

The invention provides an intelligent household equipment control method and system based on power line carrier communication, and belongs to the technical field of intelligent household control, a power line carrier gateway and a three-phase converter cooperate with an intelligent control terminal to control the whole household equipment, and a local wireless communication module and a power line carrier module are equipped for transmission and control of the household equipment. Power line carrier modules between terminal devices in different rooms are matched with power lines to transmit control signals, the system has the advantages of being high in anti-interference capacity and reliability of a wired system, the control signals are only transmitted between the devices in the same room through wireless Bluetooth, voice, infrared and other modes in the local wireless communication module, control is sensitive, and the system is convenient to use. When the whole system is installed, an existing power line is used as a communication trunk, no control bus needs to be additionally arranged, seamless coverage of a whole house power line network is achieved through access of the three-phase converter, the user experience degree is greatly improved, the assembling and installing cost is saved, and the intelligent home control efficiency is improved.

The invention discloses a power line communication network troubleshooting method and device, and the method comprises the steps: enabling a portable HPLC (High Performance Liquid Chromatography) fault diagnosis instrument to be connected into a to-be-detected power line network, and obtaining a source end equipment identifier and a network identifier of a current network node; sending a carrier request message carrying the reading instruction to a target ammeter through the source end equipment identifier and the network identifier; receiving a response signal fed back by a target ammeter for the carrier request message, and extracting a received signal strength indication and signal-to-noise ratio data from a physical layer data frame of the response signal; and comparing the received signal strength indication and the signal-to-noise ratio data with a preset communication quality threshold, if the received signal strength indication and the signal-to-noise ratio data are lower than the preset communication quality threshold, determining that a line attenuation fault occurs, and displaying a diagnosis result containing a fault type on an interactive interface of the diagnostic instrument. According to the method, the line attenuation fault can be automatically detected, the fault diagnosis accuracy and efficiency are improved, and high real-time performance and reliability are achieved.

A power line communication-based pairing method and device for an air conditioner, and a storage medium are provided. Based on a pairing request instruction, A CCO module on an indoor side selects an STA module to be paired, in a power line network, for use as a pairing object. The CCO module sends pairing request information to the power line network. The STA module receives the pairing request information. If the STA module determines that identification information thereof exists in the pairing request information, the STA module establishes a pairing relationship with the CCO module. The STA module sends pairing feedback information to the power line network. The CCO module receives the pairing feedback information. If the CCO module determines that the identification information thereof exists in the pairing feedback information, the CCO module determines that the pairing is successful and establishes a pairing relationship with the STA module.

The invention relates to the technical field of intelligent power grid equipment, and discloses a positioning method and device based on dual-mode communication and electronic equipment, hierarchical positioning is realized by fusing power line carrier communication (HPLC) and a Bluetooth technology, room-level coarse-grained positioning is provided by utilizing an inherent topological structure of a power line network, sub-meter-level accurate positioning is realized by combining the Bluetooth technology, and the positioning accuracy is improved. According to the invention, the hybrid positioning effects of low deployment cost, high precision, time synchronization and strong anti-interference capability are achieved, and the special requirements of power industry scenes are met.

The invention relates to a vehicle-mounted power line communication n-shaped adaptive impedance matching system and an impedance matching method, and aims to solve the problem that the communication reliability is reduced due to the input impedance position and the time-varying characteristic of a vehicle-mounted power line network, and the system comprises a measurement unit, a control unit and an n-shaped impedance matching unit. The measuring unit acquires a real part and an imaginary part of power line network input impedance in real time; the control unit dynamically calculates an optimal matching parameter through nonlinear optimization based on the established power conversion efficiency equation containing the loss element; the impedance matching unit adopts a variable capacitance diode and a fixed inductor which are connected in parallel to form an equivalent adjustable inductor, and an n-shaped network is formed by an adjustable capacitor and the equivalent adjustable inductor. Element loss is considered, and the power conversion efficiency can be improved; the method is suitable for vehicle-mounted engine starting / stopping, vehicle lamp turning-on / turning-off and other impedance sudden change scenes. The method obviously improves the vehicle-mounted communication reliability, and is suitable for the fields of electric vehicles, intelligent driving and the like.

The application discloses a kind of power line carrier channel evaluation methods and systems based on impedance characteristics, it is related to data analysis technical field, the method includes: obtaining the voltage response and current response of power line network to probe signal to determine impedance characteristic data on several frequency points;Initial equivalent transmission parameter is determined based on physical structure information and impedance characteristic parameter;Local parameter drift quantization analysis is carried out based on impedance characteristic data, and initial equivalent transmission parameter is corrected based on environmental data and drift quantization data;Signal propagation simulation is carried out based on target equivalent transmission parameter and topological structure information;Channel performance quantization evaluation is carried out based on signal propagation simulation information to determine the initial communication configuration deployment scheme corresponding to each communication target;The initial communication configuration deployment scheme of each communication target is analyzed to adjust conflict.This application can effectively optimize resource allocation, ensure the stability and high efficiency of entire communication network.

The present disclosure provides a system and method for supplying power to consumers in an electrical power line network. The system provides automated integration and networking logic for electrical assets. Further, the system provides consumer indexing in an electrical power-line network and facilitates an integrated drive and drone sensor data collection system for surveying and mapping service providers and consumers. The system generates virtual ground control points (GCP's) to form models of an electrical power-line network or grid extending from power generation sites to the end consumer sites.