Control circuit of electrode type liquid level meter, electrode type liquid level meter and control method of electrode type liquid level meter

Abstract

The invention relates to the technical field of liquidometers, in particular to a control circuit of an electrode type liquidometer, the electrode type liquidometer and a control method of the electrode type liquidometer, and the control circuit comprises at least one electrode switching module which comprises two input ends and is used for obtaining electrode signals of a first electrode and a second electrode, the electrode signal is converted into an input signal of the control circuit through the electrode switching module; the electrode switching module transmits an input signal to the MCU control module, the MCU control module carries out timing processing on the transmission time of the input signal, when the transmission time of the input signal is within a first threshold time set by the MCU control module, the MCU control module outputs a control signal to the electrode switching module, and the electrode switching module receives and executes the control signal. Switching attributes of the first input end and the second input end; and the power supply module is used for supplying power to each block. The control circuit of the electrode type liquid level meter provided by the invention controls each electrode to be not oxidized, not scale or slightly scale, and the control circuit has safety.

Description

technical field [0001] The invention relates to the technical field of liquid level gauges, in particular to a control circuit of an electrode type liquid level gauge, an electrode type liquid level gauge and a control method thereof. Background technique [0002] When the existing electrode type liquid level gauge is in use, the sampling water quality is generally seriously deteriorated, so that the head of the electrode metal rod is electrically corroded, and the electrode is easy to scale and creep. When the circuit uses the electrode principle to detect the water level, the electrode metal rod has a charge on it, and the electric charge will produce electrolysis of water on the surface of the electrode metal rod, in which oxygen is generated on the positive electrode metal rod, and hydrogen is generated on the negative electrode metal rod. The volume ratio of hydrogen and oxygen is 1:2, the ratio is out of balance, and oxygen has an oxidizing effect on metals, which lead...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the electrode of the electrode type liquid level gauge is easy to oxidize and scale when it is immersed in water for a long time, and the electrode type liquid level gauge itself is not safe in the case of misoperation or failure. To solve the technical problem, the present invention provides an electrode switching circuit, an electrode type liquid level gauge and an electrode switching control method, which can control the non-oxidation, no scaling or less scaling of each electrode, and effectively solve the problems caused by ion adsorption, impurity adsorption and electrode generation of air bubbles. Electrode signal acquisition is unstable, and the circuit itself is safe

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