Self-powered gas sensor based on asymmetricelectrostatic shielding effect and preparation method of self-powered gas sensor

A gas sensor and electrostatic shielding technology, applied in the field of sensors, can solve the problems of difficult large-scale integration, complex preparation, small output, etc., achieve the effect of low cost, simple preparation process, and reduce measurement error
CN107238652AActive Publication Date: 2017-10-10UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2017-10-10

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Abstract

The invention provides a self-powered gas sensor based on an asymmetricelectrostatic shielding effect and belongs to the technical field of sensors. The self-powered gas sensor comprises a friction bowlwhich is of a fan-shaped multi-blade structure and arranged in a test chamber and a metal disc with a double-electrode structure, wherein the friction bowl is close to a gas inlet and rotates under the gas flow action to form a contact-separation cycle with electrodes on the metal disc, to-be-tested gas produces the asymmetricelectrostatic shielding effect on the two electrodes on the basis of gas-sensing film adsorption, and concentration of the to-be-tested gas is measured according to output voltage of a device. Compared with an existing gas sensor, an external power supply system is not needed, the concentration of the to-be-tested gas is monitored automatically in real time, output performance is stable, and measurement errors caused by unstable output of the device are reduced; besides, the gas sensor is novel in structure and low in cost, the preparation technology is simple, commercialization is facilitated, and a new development direction is provided for study of the self-powered gas sensor.
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Description

technical field

[0001] The invention belongs to the technical field of sensors, in particular to a self-powered gas sensor based on an asymmetric electrostatic shielding effect and a preparation method thereof. Background technique

[0002] Gas sensors are widely used in military, meteorological, agricultural, industrial (especially textile, electronics, food), medical, construction and household appliances and many other fields. Therefore, gas sensors play an important role in people's production and life. At present, since most gas sensors are powered by batteries, maintenance personnel are required to replace batteries and maintain them regularly to ensure the continuous operation of equipment and systems. However, for sensor network nodes deployed in dangerous areas and extreme environments, It will not only increase the operating cost but also threaten the life safety of maintenance personnel. On the other hand, the gas-sensing properties of sensitive materials used in...

Claims

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