Automatic detecting system for water level sensors

Abstract

The invention discloses an automatic detecting system for water level sensors comprising a gas source, a precise pressure reducing valve, an air pressure controller, a host computer, an enclosed air chamber, water level sensors, a converting circuit board and a frequency meter; the host computer is connected to the air pressure controller and reads out the actual air pressure values at the gas outlet of the air pressure controller and the set air pressure value at the gas outlet of the air pressure control according to the protocol of the air pressure controller; the gas source is connected to the air pressure controller after passing through the precise pressure-reducing valve; the air pressure controller is connected to the enclosed air chamber; the water level sensors are connected to the openings of the enclosed air chamber; the electric circuit interface of the water level sensor is connected to the input terminal of the converting circuit board; the frequency output terminal of the converting circuit board is connected to the frequency input terminal of the frequency meter; the host computer is connected to the 485 port of the frequency meter; the host computer reads out the frequency values of the frequency meters according to the MODBUS protocol regularly and successively. By means of the system of the invention, the labor intensity for detecting water level sensors can be substantially reduced and multiple water level sensors can be detected simultaneously so as to increase the work efficiency.

Description

technical field [0001] The invention relates to the technical field of water level sensor processing equipment, in particular to an automatic detection system for a washing machine water level sensor. Background technique [0002] Water level sensors are widely used in today's washing machine manufacturing field and are responsible for controlling the water level of the washing machine. The precise control of the water level of the washing machine plays an important role in saving water, energy and reducing washing time. [0003] At present, the resonant water level sensor widely used in washing machines is composed of a variable inductance that reflects the water level and two capacitors, and an inverter is added to form a resonant circuit. The change of inductance causes the frequency of the resonant circuit to change. Indicates the level of the water level, and the frequency value can be read by the single-chip microcomputer of the washing machine and the amount of water...

AI Technical Summary

Problems solved by technology

[0005] The invention solves the problems of high labor intensity and low efficiency when the water level sensor of the washing machine leaves the factory for detection

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