Liquid level detector

Abstract

The invention discloses a liquid level detection device, which comprises at least one magnetic sensor with zero power consumption; a track vertically arranged in the liquid to be measured in a position opposite to the magnetic sensor; a floating ball on the liquid surface; a positioning sheet fixed on the floating ball; and a magnet fixed at one end of the positioning sheet, wherein the other end of the magnet is arranged in the track. The magnetic sensor made of magnetically bistable alloy filaments can induce the position of the floating magnet to convert liquid level into an electric signal, which is transmitted remotely through a cable wire, and the sensor detects the level height according to the induction of magnets at corresponding height without using a power supply and mechanical contacts, thus obviating the generation of electrical sparkles, saving power and achieving safe operation, no mechanical contacts and high reliability. The detection result can be transmitted remotely beyond 1,000 meters to achieve remote detection. The liquid level detection device has the advantages of simple structure, practical use, and wide application range, and is used for remote level detection of inflammable liquid and for remote level detection of liquids of other fields such as chemical engineering, mine and civil fields.

Description

technical field [0001] The invention relates to a liquid level detection device. Background technique [0002] Common liquid level detection methods include mechanical method, ultrasonic method, photoelectric method, resistance method, magnetoelectric method and other methods. Although the mechanical detection method is simple and convenient, it cannot realize remote detection. And methods such as ultrasonic method, photoelectric method, resistance method and magnetoelectric method, in known technology, they or have contact, or need to use power supply. Taking the magnetoelectric liquid level detector as an example, its working principle is based on the magnetoelectric conversion effect, that is, the liquid level is determined by the induction of the magnetic sensitive element to the floating magnetic field. In the early days, a reed switch was used as a magnetic sensitive element, but because it is a contact switch and has poor reliability, it has been gradually eliminate...

AI Technical Summary

Problems solved by technology

In a battery-powered detection system, this is a non-trivial energy drain

However, if the mains power supply is used, then if it is used for the detection of flammable liquids, there is a potential safety hazard. Once an electric spark occurs due to aging lines or other reasons, there is a danger of explosion.

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