Liquid level sensor

Abstract

The invention relates to a liquid level sensor. The liquid level sensor is composed of a floating unit component, a position benchmarking component and a monitoring system; the floating unit componentcomprises a floating unit and multiple conductive contact finger components performing telecommunication mutually; the position benchmarking component comprises multiple circular conductive units andinsulation units and a non-conductive conduit; the non-conductive conduit is arranged in the cavity of the conductive units and the insulation units; the conductive units and the insulation units arecoaxial; the conductive units and the insulation units are alternatively arranged together along the common axis; the floating unit component and the position benchmarking component are mechanicallymeshed; the floating unit component keeps constant telecommunication with at least two conductive units at any position of the position benchmarking component, so that position feedback information isprovided for the monitoring system; and the monitoring system detects the position of the floating unit component corresponding to the position of the conductive unit, so that the liquid level of a liquid storage device is determined.

Description

technical field [0001] The present application relates to the field of liquid level sensors, in particular to a liquid level sensor working in a low temperature environment. Background technique [0002] Cryogenic level sensors are often custom made for specific applications and specific gases. Not all known sensors are suitable for all cryogenic gases and for all applications. Liquid level sensors are divided into two categories: point sensors and continuous sensors. Point sensors include thermal sensors, capacitive sensors, optical sensors, acoustic sensors, and vibrating vane sensors. These types of sensors require placing multiple sensors at different heights along the reservoir. To monitor small incremental changes in liquid level, point sensors are very expensive and impractical. In addition, most point sensors cannot achieve high-precision detection due to their inherent characteristics and external induced conditions, such as the evaporation of liquid refrigerant...

AI Technical Summary

Problems solved by technology

It requires the scale and reservoir to be held together to prevent relative movement, which results in a bulky

The reliability of most continuous sensors is greatly affected by moisture or ice deposits on the sensor surface

Images