Direct-current power supply cable carrier communication system and communication method

Abstract

The invention discloses a direct-current power supply cable carrier communication system and a communication method. The direct-current power supply cable carrier communication system comprises a carrier transmission module and a carrier modulation module which are electrically connected with each other; the carrier modulation module comprises a voltage amplification circuit and a driving circuit, and the voltage amplification circuit is used for receiving a carrier instruction, amplifying and modulating the carrier instruction and then outputting a carrier amplification and modulation signal; after receiving the carrier amplification and modulation signal outputted by the voltage amplification circuit, the driving circuit outputs a carrier driving and modulation signal; the carrier transmission module comprises an electronic switching circuit and a step-down circuit, and after receiving the carrier driving and modulation signal outputted by the driving circuit, the electronic switching circuit outputs a carrier switching signal for controlling the on-off of the step-down circuit; the step-down circuit transmits a carrier direct-current power supply voltage control signal according to the carrier switching signal outputted by the electronic switching circuit. The invention has the advantages of simple circuit structure, low application cost, simple communication method and the like, and can be widely applied in various direct-current power supply cable communications.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a DC power line carrier communication system and a communication method. Background technique [0002] At present, in the field of DC power supply (automotive electronics, industrial automation and home appliances, etc.), the communication methods between master and slave machines are divided into: wired communication methods based on independent wires and communication methods based on power lines. Among them, wired communication methods based on independent wires include CAN bus, LIN bus, I2C bus, and RS32 bus. However, the more nodes in the communication, the longer the wires used to carry the communication signals, the more the number of transceiver chips, and there are disadvantages such as complex circuit structure and high application cost. Among them, the communication method based on the power line has just entered the application stage, the signal loading and dem...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the existing communication methods have the following disadvantages: (1) the more nodes in the communication, the longer the wires for carrying communication signals, which makes the circuit structure complicated; (2) the number of transceiver chips is large, and the application cost is high; 3) The method of signal loading and signal demodulation is complicated, which is not convenient for the application of power communication method

Images