Master-slave mode direct current carrier communication system and its control flow

Abstract

The invention provides a master-slave mode DC carrier communication system; wherein, a master machine comprises the clock circuit of the master machine, the power system of the master machine, the communication interface of the master machine and the control module of the master machine; a slave machine comprises the communication interface of the slave machine, a rectifier bridge circuit, an energy storage module, the power system of the slave machine, the clock circuit of the slave machine and the control module of the slave machine. The master machine can be the initiation device of an electronic detonator; the slave machine can be the electronic detonator. A unipolarity communication interface consisting of a unipolarity data modulating module and a unipolarity data demodulating module or a bipolar communication interface consisting of a bipolar date modulating module and a bipolar data demodulating module can be selected as the communication interface of the master machine; the communication interface of the slave machine can comprise the data modulating module and the data demodulating module of the slave machine. The invention also provides a control method for the master machine and the slave machine in the system. The technical scheme realizes the bidirectional data alternation between the master machine and the slave machine when the master machine supplies a working power to the slave machine, thereby improving the maintainability of the system.

Description

technical field [0001] The invention relates to the communication field, in particular to a master-slave direct current carrier communication system and its control flow. Background technique [0002] In the centralized-distributed control system in the field of industrial control, industrial field control buses such as PROFIBUS, LONWOKS, CAN, and FF are often used. Its characteristic is that each distributed node needs to have a power supply system independent of the bus, and the polarity of the bus must be connected accurately in order to perform data exchange normally. [0003] In the carrier communication system, the power line carrier communication system is often used at present, that is, the host loads the data information to be transmitted on the base frequency power line in the form of high frequency waves, so as to realize the power supply to the slaves of each node and complete the data at the same time. transmission. The characteristic of this system is that th...

AI Technical Summary

Problems solved by technology

[0005] 1. Each node slave needs to have a special module to send and receive data, and the cost is high

[0006] 2. AC carrier greatly increases the complexity of the slave power system

[0007] 3. The performance of each module used by the node slave is very different, and modules such as isolation transformers are difficult to integrate

[0009] 1. The data receiving circuit is composed of resistor divider or Zener tube rectification, which leads to a large power consumption of the slave and increases the load of the host

[0010] 2. The communication interface is placed behind the rectifier bridge, which is no longer applicable to systems that use bipolar data high-speed transmission

[0011] In the slave communication interface provided by the patent ZL200420084237.4, a dedicated module is used to receive and send data, but the integration is poor, and it cannot meet the application requirements of small slaves.

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