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High-precision induction linear displacement sensor

A linear displacement and sensor technology, applied in the field of sensors, can solve the problems that magnetic displacement sensors cannot realize linear translation measurement and reduce measurement accuracy, and achieve good dustproof and anticorrosion performance, high measurement accuracy and small size.

Pending Publication Date: 2021-05-14
SUZHOU HAIZHO ELECTRONIC SCI & TECH LTD CO
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AI Technical Summary

Problems solved by technology

Due to the splicing of two non-continuous magnets, the magnetic field generated around the entire magnetic unit appears non-uniform, thereby reducing the measurement accuracy, usually + / -3.5% (full scale)
And due to the size limitation of the magnet material, and the magnetic induction device must directly face the magnet, the magnetic displacement sensor cannot realize the linear translation measurement between the small intervals (<1mm) of 1.5mm thick and thin-walled cylinders

Method used

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Embodiment Construction

[0020] A high-precision inductive linear displacement sensor, which includes an outer shell, a chip 8, a measuring body, and an inductive sheet 4, the inductive sheet is stamped from a metal material, the outer shell is an L-shaped structure, and includes an integrally formed chip installation Part 1 and measuring body mounting part 3, the chip is clamped on the chip mounting part, the measuring body is a flexible circuit board 7, and the flexible circuit board and the measuring body mounting part are integrated by low-pressure injection molding and are integrated with the measuring body of the chip. interface connection.

[0021] Optimized, the induction piece, the measuring body mounting part and the flexible circuit board are all arc-shaped thin-walled structures, which can realize accurate measurement of linear translation between two thin-walled cylinders with an interval of <1mm. The induction piece is fixedly installed on the The outer wall of a cylinder moves linearly ...

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Abstract

The invention relates to the technical field of sensors and particularly relates to a high-precision induction linear displacement sensor. The sensor comprises an outer shell, a chip, a measuring body and an induction piece, wherein the induction piece is formed by stamping a metal material, and the outer shell is of an L-shaped structure and comprises a chip mounting part and a measuring body mounting part which are integrally formed; the chip is clamped on the chip mounting part, the measuring body is a flexible circuit board, and the flexible circuit board and the measuring body mounting part are integrated through low-pressure injection molding and are connected with a measuring body interface of the chip. The device provided by the invention is simple in structure, convenient to manufacture and install, high in measurement precision and good in dustproof and anticorrosive performance.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a high-precision inductive linear displacement sensor. Background technique [0002] At present, the known non-contact linear displacement sensor adopts a magnetic measurement method. For the application of measuring displacement > 35mm, a magnetic material unit composed of two 5mm×5mm discontinuous cuboid magnets is usually used. Due to the splicing of two non-continuous magnets, the magnetic field generated around the entire magnetic unit appears inhomogeneous, thereby reducing the measurement accuracy, usually the accuracy is + / -3.5% (full scale). And due to the size limitation of the magnet material and the fact that the magnetic sensing device must directly face the magnet, the magnetic displacement sensor cannot achieve linear translation measurement between small intervals (<1mm) of 1.5mm thick and thin-walled cylinders. Contents of the invention [0003] The tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 朱卫盖彦青江平新杜军伏亮亮
Owner SUZHOU HAIZHO ELECTRONIC SCI & TECH LTD CO
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