Electronic sensor for liquid level location

Abstract

The invention discloses an electronic sensor for liquid level position. A self-coupling resistance card has at least three contact tracks, and each contact track independently forms a complete potential contact surface with fixed intervals and sequentially corresponding resistance values, or wherein Part of the track is designed as the above-mentioned potential contact surface, and the other part of the track is designed as the contact surface connected by the adjustable end; the pressure shrapnel corresponds to the self-coupling resistance card, has at least three contacts in contact with the contact surface of the track, and has its own adjustable end connection part. When the pressure shrapnel rotates, the moving track of each contact on the pressure shrapnel corresponding to the self-coupling resistance card coincides with one of the tracks of the self-coupling resistance card. The invention has high reliability, long service life and stable performance; it is suitable for stock measurement of liquid storage in a fixed volume detected in automobiles and other mechanical fields and medical equipment.

Description

technical field [0001] The invention relates to an electronic sensor for detecting the liquid level position of a liquid. Background technique [0002] In the field of automobiles and other machinery, it is necessary to measure the stock of oil or other liquids stored in fuel tanks or other containers to ensure that the stock of the liquid can meet the needs of normal work. [0003] The electronic sensor that detects the position of the liquid level in the prior art is like this. In a container with a fixed shape, the increase or decrease of the liquid stock will cause the position of the liquid level to move up and down, and can cause the float that is always floating on the liquid level to go up and down accordingly. Move, the float then drives the floating rod across the axis of rotation to rotate around the axis. The rotation of the floating rod also drives the pressure shrapnel with contacts fixed on the rotation axis to rotate at the same angle as the floating rod. P...

AI Technical Summary

Problems solved by technology

Due to the environment in different containers and the different physical and chemical characteristics of the liquid (including the purity of the liquid itself, the content of impurities, and the mixing with the residual waste liquid in the container, etc.), after a short period of time, it is very likely that the contact of the pressure shrapnel (including the pressure shrapnel) The contact surface of the self-coupling resistance card track, due to the physical and chemical reactions of the material, will produce different degrees of emulsification, corrosion, pollution, deformation, wear, and even groove marks, which may cause the pressure shrapnel contact Poor contact between the point and the contact surface of the self-coupling resistance card track, resulting in inaccurate or invalid voltage output at the potential point, or due to the adjustable end (including the shrapnel itself or the resistance card formed by the contact between the shrapnel contact and the adjustable end contact surface) ) fails due to poor connection

[0005] Moreover, since the above-mentioned electronic sensor needs to be fixedly installed in the container, the container can be sealed and formed after installation, so disassembly and maintenance are also difficult, and should be avoided as much as possible.

[0006] If special materials are used to make components such as pressure shrapnel and self-coupling resistance cards of electronic sensors; or the main body of electronic sensors is sealed or moved outside the container for installation, although the above-mentioned problems can be avoided, it will lead to higher costs

[0007] Therefore, the existing electronic sensors have poor adaptability, narrow applicability, great impact on environmental changes, low reliability, short service life, and may cause problems in use due to reduced accuracy after a period of time

Images