Communication method of intelligent pipeline temperature control early warning system based on switch harmonic waves

Abstract

The invention discloses a communication method of an intelligent pipeline temperature control early warning system based on switch harmonic waves, which comprises the intelligent pipeline temperature control early warning system, and each heat tracing band device in the intelligent pipeline temperature control early warning system comprises a controller, a switch tube and a heat tracing band. Each controller supplies power to the heat tracing band corresponding to the controller by controlling the switch tube; the controller controls the switching tube signal to be converted between a PWM signal with f frequency and a constant level signal, and realizes the change that the current FFT of the power supply end has higher harmonics with f integer multiples and does not have higher harmonics with f integer multiples; and the controller performs data reading and identification on a level signal sent by the power supply of the switching tube in an asynchronous time sequence mode by the current harmonic analysis module installed at the power supply side, and uploads the data to a server through the IOT module after the data is identified. According to the invention, no extra communication line is needed, the fault problem of the communication line in the traditional scheme is completely eliminated, the transmission mode is simplified, and the transmission reliability is improved.

Description

technical field [0001] The invention relates to the technical field of pipeline temperature control and communication, in particular to a communication method for an intelligent pipeline temperature control early warning system based on switching harmonics. Background technique [0002] The IOT module of the intelligent pipeline heating device relies on the established wireless network, but the industrial situation is complex and changeable, and some of the application environments of the pipeline to be heated have electromagnetic shielding, such as the closed space of the all-metal shell, and the established wireless network such as WIFI or 5G is difficult. cover. The traditional solution adopts wired communication, connects devices with 485, CAN and other bus methods, and completes data transmission on terminals that can be connected to the Internet. The structure diagram of the traditional wired communication scheme is as follows: figure 1 As shown, each equipment 200 (...

AI Technical Summary

Problems solved by technology

This type of bus requires additional communication line construction. The harsh industrial environment puts forward higher requirements for line communication with weak current signals as the carrier. Communication network errors and packet loss caused by factors such as long-distance transmission, line conduction interference, and high and low temperature resistance , Bus hangup and other errors reduce the stability of the communication network, and in serious cases will cause the failure of the entire IoT network

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