All-carbon aerogel pressure sensor

Abstract

The invention provides an all-carbon aerogel pressure sensor, and belongs to the technical field of sensors. The body of the all-carbon aerogel pressure sensor is prepared based on a carbon material,and the constituent units comprise: a carbon or carbon-based aerogel elastomer; a carbon or carbon-based electrode; a carbon or carbon-based wire; and an electrical signal measuring device. The electrical signal measurement is to measure contact electrical signals between the electrode and the carbon aerogel elastomer and their changes. The carbon aerogel is an elastic conductive carbon aerogel. The elastic conductive carbon aerogel material has certain conductivity, good elasticity and a porous network structure. The carbon aerogel pressure sensor provided by the invention has the characteristics of low detection lower limit, high sensitivity, detectable omnidirectional pressure, light weight, resistance to acid, alkali and salt corrosion, and wide application temperature range, and can be applied to extreme environments and air-space fields.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to an all-carbon airgel pressure sensor. Background technique [0002] Pressure is a physical quantity that often needs to be measured or dynamically monitored in production and life. The existing common pressure sensors include metal strain gauge pressure sensors, ceramic pressure sensors, diffused silicon pressure sensors, piezoelectric pressure sensors, and semiconductor pressure sensors. The sensitive materials used in these pressure sensors, such as steel and silicon, have high Young's modulus and low sensitivity coefficient, which leads to the weak detection ability of these types of sensors for small pressure, that is, the lower detection limit is higher, up to several kPa. Compared with the traditional pressure sensor, the new type of pressure sensor developed in recent years that uses conductive rubber mixed with carbon or metal particles with a small Young's modulus as th...

AI Technical Summary

Problems solved by technology

The sensitive materials used in these pressure sensors, such as steel and silicon, have high Young's modulus and low sensitivity coefficient, which leads to the weak detection ability of these types of sensors for small pressure, that is, the lower detection limit is higher, up to several kPa

Compared with the traditional pressure sensor, the new type of pressure sensor developed in recent years that uses conductive rubber mixed with carbon or metal particles with a small Young's modulus as the sensitive material has a lower detection limit, about 100Pa, and about 10Pa. Corresponding to a light touch on the human sense of touch, this type of sensor cannot be compared with the lower limit of human natural skin tactile detection

At the same time, the traditional pressure sensor has a single structure; an adhesive such as silver glue is needed to fix the electrode and the sensitive material to reduce the influence of the interface contact resistance, so the electrode cannot move, and the pressure in any direction cannot be measured; especially the traditional Pressure sensors have disadvantages such as heavy weight, harsh environments such as acids, alkalis and salts, narrow operating temperature range, and inability to be used in extreme conditions and in the aviation field. It is difficult to meet the rapid development of the pressure detection field.

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