One position detection device, location sensing device and location sensing system

Abstract

The invention provides a position detection device, which comprises a device body and a sensor valve core, wherein the sensor valve core is fixed in the device body in a reciprocating mode; a tail section of the sensor valve core is immersed in the device body, and a head section of the sensor valve core is positioned outside the device body; an air inlet hole for connecting an external air source and an air leakage hole communicated with the air inlet hole are respectively formed on the device body; and when the sensor valve core moves along with the movement of a detected part, the sensor valve core gradually blocks or dredges a channel between the air inlet hole and the air leakage hole. The invention also provides a position sensing device and a position sensing system by using the position detection device. The position detection device has high performance in humid, waterish and high-temperature environments.

Description

technical field [0001] The invention relates to position sensors in the field of industrial control. Background technique [0002] At present, the sensors used in the domestic engine manufacturing industry are mostly inductive or capacitive metal induction switches, which have a certain waterproof level and are not resistant to high temperatures. At high temperature, when water or other liquids are washing, the pins of the sensor will have poor contact; when working in an environment higher than 50 degrees, the internal coil and non-metallic materials will be deformed, and the sensing accuracy and sensitivity will decrease or even fail. . Contents of the invention [0003] In order to solve the technical problem of poor performance of existing sensors in humid, watery and high-temperature environments, the present invention provides a position detection device, including a device body and a sensor spool, the sensor spool is fixed to the device body in a reciprocating mann...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem of poor performance of existing sensors in humid, watery and high-temperature environments, the present invention provides a position detection device, including a device body and a sensor spool, the sensor spool is fixed to the device body in a reciprocating manner Inside, its tail section is submerged in the device body, and its first section is located outside the device body. The device body is respectively opened with an air inlet for connecting to an external air source and a vent hole communicating with the air inlet. When the sensor valve core is detected When the moving parts move, the sensor spool gradually blocks or clears the passage between the intake hole and the vent hole

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