Power supply real-time communication method

Abstract

The invention provides a power supply real-time communication method, which is used for mutual communication among a plurality of nodes. In the method a node is addressed by a time division multiplexing mode, and each time slot of a synchronizing pulse corresponds with a node address, wherein each time slot is divided into four time intervals by five moments from t1 to t5. After the system is initiated, the method comprises the following steps: 1, a synchronous power supply signal supplies power to all N nodes in synchronized power supply time intervals, and is delayed to the t1 moment of the first node; 2, the synchronous power supply signal is changed from high level to first low level at the t1 moment of the time slot of the corresponding node, and is delayed to t2 moment for input operation of the node until t3 moment; 3, the output state of the node is detected at t3 moment for output operation of the node until t4 moment; 4, high level of the synchronous power supply signal is maintained to charge the node in the time interval of between t4 and t5; and 5, the nodes are counted to determined whether a communication cycle is completed or not. The system circulates the operation in the performed way.

Description

technical field [0001] The invention relates to a method for real-time communication with power supply, especially a method for real-time communication with two-wire power supply, which is used for real-time digital node control communication in the fields of industrial control systems, fire protection systems, building automation, and vehicle detection technology. . Background technique [0002] At present, in the fields of industrial control, fire protection system, building automation, and vehicle detection technology, remote communication technology has not been well resolved as one of the difficult problems. In China, the most widely used centralized meter reading communication method is still dominated by the 485 bus, which makes the few nodes (generally no more than 100 points) and short distance (generally hundreds of meters) originally designed for industrial automation data collection , The 485 bus communication that can standardize the wiring is difficult to reli...

AI Technical Summary

Problems solved by technology

In China, the most widely used centralized meter reading communication method is still dominated by the 485 bus, which makes the less nodes (generally no more than 100 points) and short distance (generally hundreds of meters) originally designed for industrial automation data collection , The 485 bus communication that can standardize the wiring is difficult to apply reliably in the communication of multi-node (thousands, tens of thousands), long-distance (thousands of meters), and arbitrary distribution wiring methods

In the field of industrial automation applications, the cost of PRFBUS, CAN, HART, FF and other communication methods used in multi-node and long-distance data communication is relatively high.

In Europe, the communication method of household instruments is mainly M-BUS (Meter Bus), which can solve multi-node and long-distance communication problems, but due to its high cost and complicated application technology, it is still difficult to obtain widely used

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