An electrolytic aluminum monitoring system

Abstract

The invention discloses an electrolytic aluminum monitoring system. A coupled isolation circuit receives the terminal signal of an equipment layer subsystem, and the terminal signal is coupled with +5V after being amplified by a triode Q1; after the terminal signal passes through a MOS tube switch T1, one path of the terminal signal enters a reduction filter circuit to reduce the terminal signal after being isolated by a photoelectric coupler U1, and the terminal signal is used as a modulation signal after filtering, and the other path of the terminal signal enters a carrier wave generation circuit to be used as a voltage control signal to control a voltage control vibration circuit to generate a carrier wave signal. A resonance circuit is arranged, one path is fed back to a base of a triode Q2, the frequency stability is improved, the other path is fed back to the positive end and the negative end of the voltage control signal after detection, and amplitude distortion is reduced. Themodulation circuit adds the received carrier wave signal to a base of a triode Q3 through a transformer T1 and adds the received modulation signal to an emitting electrode of the triode Q3 through a transformer T2, and a collector tuning loop of the triode Q3 outputs amplitude-modulated waves to an emitter. Different carrier wave signals are set for different systems to achieve transmission, and therefore the problem of signal transmission interference between equipment layer subsystems is avoided.

Description

technical field [0001] The invention relates to the technical field of grid data acquisition, in particular to an electrolytic aluminum monitoring system. Background technique [0002] In recent years, the production of electrolytic aluminum industry has expanded rapidly. Because it is a high-energy-consuming industry, under the pressure of international competition and environmental protection, the industry urgently needs effective optimization methods for increasing production capacity, improving efficiency, reducing costs, and reducing pollution. With the gradual expansion of the scale of new projects, the continuous improvement of the power supply voltage level, and the gradual increase of the power supply current, higher requirements are put forward for the safe production and efficient management of the electrolytic aluminum industry. [0003] At present, the electrolytic aluminum monitoring system is divided into the equipment layer including the automation system of ...

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Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide an electrolytic aluminum monitoring system, which effectively solves the problem of signal transmission interference between equipment layer subsystems by setting up different carrier signals for different systems for transmission. question

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