Novel pressure sensor

A pressure sensor, a new type of technology, applied in the direction of measuring fluid pressure, instruments, and fluid pressure measurement using capacitance changes, etc., can solve the problems of limited application range of MEMS resistive pressure sensors, easy failure of measurement circuits, and lack of corrosion resistance. , to achieve the effect of compact structure, high reliability and improved reliability

Pending Publication Date: 2019-01-18
DONGFENG AUTOMOBILE ELECTRONICS
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Problems solved by technology

Since the measurement circuit is in contact with the measured medium and has no corrosion resistance, when the measured medium is corrosive, the measurement circuit is prone to failure, so the application range of MEMS resistive pressure sensors is limited

Method used

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Embodiment Construction

[0014] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] like Figure 1-2 A new type of pressure sensor is shown, including a metal shell 1 of the sensor, and a terminal button 5 whose lower end is inserted into the top opening of the shell and matched with the installation, and a ceramic capacitive sensitive element assembly 3 is installed in the metal shell 1, An O-shaped sealing ring 2 is arranged between the lower end of the ceramic capacitive sensitive element assembly 3 and the housing, and a soft circuit board 4 is used to connect the c...

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Abstract

The invention provides a novel pressure sensor. The novel pressure sensor comprises a metal shell of the sensor, an end button, and a ceramic capacitive sensitive element assembly, wherein the lower end part of the end button is inserted into an opening in the top end of the shell, and the end button is mounted in a matched mode; the ceramic capacitive sensitive element assembly is mounted in themetal shell; an O-shaped sealing ring is arranged between the lower end of the ceramic capacitive sensitive element assembly and the shell; the ceramic capacitive sensitive element assembly and the end button are connected through a soft circuit board; the metal shell tightly presses the ceramic capacitive sensitive element, and the O-shaped sealing ring is extruded to form a sealing cavity. The novel pressure sensor is mainly used for detecting the external pressure, especially in an environment with certain corrosivity and wide working temperature range, and has the characteristics of compact structure, corrosion resistance, high and low temperature resistance and high reliability.

Description

technical field [0001] The invention relates to a novel pressure sensor. Background technique [0002] At present, the pressure sensors used in commercial vehicles mainly use MEMS technology. The principle is to convert the pressure signal into a resistance signal through a Wheatstone bridge measurement circuit, and output it in the form of voltage or current after analog-to-digital conversion, calibration and compensation. Since the measurement circuit is in contact with the measured medium and has no corrosion resistance, when the measured medium is corrosive, the measurement circuit is prone to failure, so the MEMS resistive pressure sensor has a limited scope of application. Contents of the invention [0003] The present invention proposes a new type of pressure sensor. Since its measuring element is a ceramic capacitor, the chemical stability and thermal stability of the ceramic itself determine that the measuring element of this type of sensor is not easy to corrode ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14
CPCG01L9/12G01L19/14
Inventor 耿纯洁耿向阳周斌叶龙薛娇
Owner DONGFENG AUTOMOBILE ELECTRONICS
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