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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach greatly increases the difficulty of the sensor manufacturing process and significantly increases the cost.

Method used

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

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

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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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