An industrial control system based on the Internet of Things

Abstract

The invention discloses an industrial control system based on the Internet of Things. The system comprises a frequency acquisition circuit 1, a frequency acquisition circuit 2, a signal calibration circuit and a signal output circuit, the frequency acquisition circuit 1 and the frequency acquisition circuit 2 acquire signal frequencies of an input end and an output end of an analog signal transmission channel. According to the signal calibration circuit, a voltage stabilizing circuit composed of an operational amplifier AR1, an operational amplifier AR2 and a variable resistor R7 is used for stabilizing the signal potential, a frequency acquisition circuit 1 outputs the signal potential, and the frequency acquisition circuit 2 outputs a signal to pass through an inductor L4, a triode Q3 and a capacitor C6-capacitor C8 to form a frequency modulation circuit to perform frequency modulation on the signal; finally, a triode Q1 and a triode Q2 are used for forming a switching circuit; and the signal output circuit uses a composite circuit composed of an operational amplifier AR3, an operational amplifier AR4, a capacitor C3 and a capacitor C4 to filter disturbance signal noise and then outputs the disturbance signal noise, namely the error correction signal of the industrial control system control terminal based on the Internet of Things, so that the accuracy of the error correction signal is ensured.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to an industrial control system based on the Internet of Things. Background technique [0002] At present, the application of Internet of Things technology in industry mainly includes manufacturing execution system (MES), manufacturing supply chain management, production process optimization, product equipment monitoring management, environmental monitoring and energy management, safety production management and advanced manufacturing technology, etc. In one aspect, the industrial control system based on the Internet of Things mainly includes an industrial equipment power acquisition module, a control terminal, and a signal transmission module. The power acquisition module collects the operating power of industrial equipment and transmits it to the control terminal through the signal transmission module, while the power During the transmission process of the output signal of the ac...

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Problems solved by technology

[0002] At present, the application of Internet of Things technology in industry mainly includes manufacturing execution system (MES), manufacturing supply chain management, production process optimization, product equipment monitoring management, environmental monitoring and energy management, safety production management and advanced manufacturing technology, etc. In one aspect, the industrial control system based on the Internet of Things mainly includes an industrial equipment power acquisition module, a control terminal, and a signal transmission module. The power acquisition module collects the operating power of industrial equipment and transmits it to the control terminal through the signal transmission module, while the power During the transmission process of the output signal of the acquisition module through the signal transmission module, there will be certain signal errors, especially due to the interference of the same frequency signal or strong magnetic field during the signal transmission process, the signal error will be greater, so that a wrong analysis can be made. Therefore, it is necessary to monitor the signal in the analog signal transmission channel in real time

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