Variable-capacitance pressure sensor

A pressure sensor and capacitor technology, applied in the sensor field, can solve the problems of increasing the difficulty of the sensor manufacturing process and increasing the cost, and achieve the effects of reducing the number of components, saving costs, and simplifying the production and assembly process

Pending Publication Date: 2019-02-15
伍颖超 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This approach greatly increases the difficulty of the sensor

Method used

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  • Variable-capacitance pressure sensor
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Example Embodiment

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0037] In an embodiment of the present invention, such as Figure 1-12 , Variable capacitance pressure sensor, including double-layer flexible circuit board 1, multilayer ceramic capacitor 3, soft conductive gasket 4, pressure applying component 5; multilayer ceramic capacitor 3 and soft conductive gasket 4 are arranged close to each other, multilayer ceramic A double-layer flexible circuit board 1 with a through hole or gap 13 is provided between the capacitor 3 and the soft conductive gasket 4. The m...

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Abstract

The invention provides a variable-capacitance pressure sensor, which includes a double-layer flexible circuit board, a multi-layer ceramic capacitor and a soft conductive gasket. The multi-layer ceramic capacitor is arranged close to the soft conductive gasket. The double-layer flexible circuit board with a through hole or a gap is arranged between the multi-layer ceramic capacitor and the soft conductive gasket. The multi-layer ceramic capacitor is arranged above the through hole or the gap. The soft conductive gasket is arranged below the through hole or the gap. When the soft conductive gasket deforms under external pressure, the soft conductive gasket will pass through the through hole or the gap of the flexible circuit board and contact the ceramic medium of the multi-layer ceramic capacitor. When the external pressure changes, the contact area between the soft conductive gasket and the ceramic medium of the multi-layer ceramic capacitor will change, and the capacitance value between the soft conductive gasket and external electrodes connected into the multi-layer ceramic capacitor will change. The number of components is reduced, the production and assembly process is simplified, and the cost is reduced.

Description

technical field [0001] The present invention relates to a sensor, in particular to a variable capacitance pressure sensor. Background technique [0002] At present, the method of adopting the variable capacitance sensor as the pressure sensor in the pen has been used for many years. A variable capacitance sensor is actually a standard plate capacitor. The two poles of the capacitor are formed by soft conductive deformable electrodes and a metal electrode; the medium of the capacitor is formed by dielectric and insulating pads. The metal electrode needs to be closely attached to the dielectric, and there should be no air in between to ensure the performance of the sensor. The insulating pad is placed between the soft conductive deformable electrode and the dielectric, and the insulating pad usually has a hole in the middle, so that there is an air gap between the soft conductive deformable electrode and the dielectric. Please refer to the US patent US5206785 for the workin...

Claims

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Application Information

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IPC IPC(8): G01L1/14
CPCG01L1/142
Inventor 伍颖超陈松骆航
Owner 伍颖超
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