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A capacitive pressure sensor

A pressure sensor, capacitive technology, applied in the direction of measuring fluid pressure through electromagnetic components, measuring fluid pressure, instruments, etc., can solve the problems of tightness, small load force, etc., and achieve the effect of improving overload resistance and enhancing work efficiency

Active Publication Date: 2021-06-22
东台市高科技术创业园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the shortcomings of the pressure sensor, the present invention provides a capacitive pressure sensor, which has the advantages of large load resistance and stable structure, and solves the problems of tightness and small load force

Method used

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] see Figure 1-4 , a capacitive pressure sensor, comprising a casing 1, the outer side of the casing 1 is fixedly sleeved with a mounting clamping nut 2, the top of the casing 1 is fixedly connected with a connector 3, and the outer side of the middle of the casing 1 is fixedly connected with a seal Ring 4, the bottom of the casing 1 is fixedly connected with the diaphragm 5, the inner wall of the casing 1 is fixedly connected w...

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Abstract

The invention relates to the technical field of electronic devices, and discloses a capacitive pressure sensor, which includes a housing, a diaphragm is fixedly connected to the bottom of the housing, and an O-ring is fixedly connected to the inner wall of the bottom of the housing. A baffle is placed on one side of the diaphragm, an arc-shaped plate is fixedly connected to the bottom of the baffle, and a transfer film is fixedly connected to the outside of the baffle, and liquid is filled between the diaphragm and the transfer film. The capacitive pressure sensor uses silicone oil to make the transfer film and the arc plate have a certain distance, and the silicone oil transmits the force received by the transfer film to the diaphragm, and converts the deformation of the diaphragm into the displacement of the transfer film. The distance between the plate and the transmission film is used to control the deformation of the diaphragm. When the pressure reaches the maximum upper limit of the diaphragm, the transmission film and the arc-shaped plate fit together, and the baffle distributes the force to the shell to prevent the diaphragm from being damaged due to pressure. Exceeding the bearing capacity produces fracture events, thereby improving the overload resistance of the overall device.

Description

technical field [0001] The invention relates to the technical field of electronic devices, in particular to a capacitive pressure sensor. Background technique [0002] The capacitive pressure sensor can be used inside the combustion chamber of the internal combustion engine. The pressure inside the combustion chamber acts on the diaphragm, making the diaphragm concave and changing the distance between the diaphragm and the electrode plate. The capacitance balance between the two is broken, and then electricity is generated, and the electrical signal is transmitted through the lead, so as to achieve the purpose of monitoring. [0003] However, existing pressure sensors have problems: [0004] 1. The connection between the diaphragm and the shell is a right-angle connection. When the diaphragm is deformed to a certain degree of concave, the diaphragm will lift up, thus affecting the sealing performance inside the shell. [0005] The detection of the diaphragm has a certain u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L19/06G01L9/00
CPCG01L9/0072G01L19/0618
Inventor 吕伟
Owner 东台市高科技术创业园有限公司
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