A linear displacement sensor probe head assembly for high pressure environment, a linear displacement sensor and a manufacturing method of the probe head assembly

By incorporating through-holes in the online displacement sensor to achieve pressure balance and insulation protection, the structural deformation and sealing failure problems of traditional sensors under high-pressure environments are solved, thereby improving measurement accuracy and lifespan.

CN122237418APending Publication Date: 2026-06-19BEIJING XINGKONG JIANTENG ELECTRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING XINGKONG JIANTENG ELECTRONICS TECH CO LTD
Filing Date
2026-05-08
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Traditional linear displacement sensors are prone to plastic deformation of the housing and deterioration of sealing performance in high-pressure liquid environments, resulting in decreased measurement accuracy and overall failure, making them unsuitable for extreme high-pressure conditions.

⚗Method used

A linear displacement sensor probe assembly for high-pressure environments is designed. Pressure balance is achieved by setting through holes in the shell and frame. Combined with vacuum impregnation treatment to form an insulating protective layer, the internal pressure is synchronized with the external pressure, the shell is prevented from being subjected to unidirectional high-pressure load, and the liquid medium is isolated from the coil assembly.

🎯Benefits of technology

This technology improves the structural stability and measurement accuracy of the sensor under high-pressure environments, extends its service life, reduces the risk of seal failure, and adapts to higher pressure liquid environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to a probe assembly for a linear displacement sensor used in high-pressure environments, a linear displacement sensor, and a method for manufacturing the probe assembly. The probe assembly includes a coil assembly and a housing. The coil assembly is sealed and installed inside the housing. The coil assembly includes a frame, around which coil units are tightly wound. An insulating protective layer is applied to the surface of the coil assembly before it is sealed and installed inside the housing. The sidewall of the housing has several through-holes penetrating the housing to connect the external high-pressure liquid environment with the internal cavity of the housing. An axially penetrating through-hole is provided at one end of the frame facing the sensor interior, connecting the cavity of the housing with the internal cavity of the frame. This invention offers advantages such as simple manufacturing process, controllable manufacturing cost, strong pressure resistance, guaranteed measurement accuracy, and extended service life.
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