Two-wire system power supply and networking communication system

Abstract

The invention relates to a two-wire system power supply and networking communication system. The system comprises a host and a slave, the host is used for transmitting energy and communication data tothe two-wire bus in a pulse mode; the slave is connected to the two-wire bus in a hanging manner; the slave is used for receiving the energy and communication data transmitted by the host; and the slave is also used for pulling waveform change on the two-wire bus through a data sending port to realize transmission of communication data from the slave to the host. According to the two-wire systempower supply and networking communication system provided by the invention, tree-shaped, ring-shaped and star-shaped random networking can be realized, the networking method is flexible, the cost is low, and the application requirements of some special fields can be met.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a two-wire power supply and networking communication system. Background technique [0002] At present, in the fields of shipbuilding, military industry, automotive electronics, industrial automation and home appliances, the central controller of the master and slave machines and the controlled equipment are connected by means of dedicated power supply circuits and communication circuits, and the wired power supply based on independent wires wired and wired communication lines or dedicated wireless communication equipment to work. However, in some special fields (the number of lines is strictly required (line nodes are as few as possible) or long-distance transmission (in order to reduce the cost of cables)), it is necessary to meet the requirements of power supply and communication control. [0003] Therefore, the existing connection methods have the following disadvantages:...

AI Technical Summary

Problems solved by technology

[0004] (1) The more nodes in the communication, the more complex the line structure

That is, as the number of mounted nodes on the bus increases, the communication signal strength in the line will be significantly attenuated, affecting normal communication;

[0005] (2) As the circuit load changes, the parameters of the components in the line need complex calculation and adjustment

The bus load increases, the line voltage drop increases, the pressure difference between the master and the slave is more obvious, the comparator of the slave is difficult to distinguish the data sent by the master to the bus, the amplitude of the modulation signal sent by the slave is small, and the master is also difficult to collect. Without adjusting the parameters of components, the normal communication cannot be guaranteed;

[0006] (3) The number of transceiver chips is large, and the application cost is high

In order to improve the problems caused by multi-node and large current voltage drop, high-precision filtering and shaping devices must be added to the circuit, which increases the cost;

[0007] (4) The data transmission speed is limited and cannot meet the needs of communication use

In order to improve the problems caused by multi-node and large current voltage drop, the traditional solution needs to reduce the communication speed and the bit error rate in addition to the solution of the third point above, which cannot be satisfied for devices with large data flow requirements. Require

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