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

Active Publication Date: 2017-10-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The self-powered gas sensors commonly used in the prior art are mainly based on the piezoelectric effect or the photovoltaic effect. However, the above-mentioned devices have shortcomings such as small output, complicated preparation, high cost, and difficulty in large-scale integration. Therefore, there is an urgent need for a sensor that can overcome the above-mentioned Defective self-powered gas sensor

Method used

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

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Embodiment 1

[0049] Such as figure 1 As shown, the present invention provides a method for preparing a self-powered gas sensor based on an asymmetric electrostatic shielding effect, comprising the following steps:

[0050] Step A: Prepare the friction rotor 4; use a laser cutting machine to cut the Teflon film to form a four-leaf fan-shaped structure with a diameter of 5 cm as the friction film. According to the common knowledge in the art, the material for the friction rotor 4 can be any suitable material , this embodiment only gives a preferred material; in order to better drive the rotation of the fan-shaped blades, this embodiment adheres a light and thin forced air cylinder on the side of each fan-shaped blade. According to the common knowledge in the art: it is helpful The structure rotating on the fan-shaped blade is not limited to the above-mentioned structure, but can be any suitable structure;

[0051] Step B: Prepare a gas-sensitive double electrode; select a plexiglass substra...

Embodiment 2

[0060] In this embodiment, except that the Teflon film is an enhanced polymer friction film with a rough surface obtained through reactive ion etching, the rest of the structure and preparation process are the same as in Example 1, and will not be repeated here.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/60
CPCG01N27/60
Inventor 苏元捷王斯刘雪燕杨静杜鸿飞张秋平谢光忠太慧玲杜晓松蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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