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External force triggered type response enhanced self-powered gas sensor and preparation method thereof

A gas sensor and triggering technology, applied in the field of sensors, can solve problems such as threatening the life safety of maintenance personnel, hindering the application of flammable and explosive gases, increasing operating costs, etc., to improve quantum efficiency, improve gas sensor response rate and sensitivity, The effect of low processing cost

Active Publication Date: 2019-01-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most sensors are powered by external power sources or batteries, and maintenance personnel are required to maintain or replace batteries regularly to ensure the continuous operation of equipment and systems. For sensor network nodes deployed in dangerous areas and extreme environments, this Not only increases operating costs but also threatens the life safety of maintenance personnel
On the other hand, gas sensors based on traditional inorganic ceramics and metal oxides need to work at high temperatures, and need to be equipped with heaters and additional energy supply. The demand for the gas sensor network to work, and the requirement for high temperature heating also hinder the application in the detection of flammable and explosive gases

Method used

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  • External force triggered type response enhanced self-powered gas sensor and preparation method thereof
  • External force triggered type response enhanced self-powered gas sensor and preparation method thereof
  • External force triggered type response enhanced self-powered gas sensor and preparation method thereof

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Embodiment 1

[0042] This embodiment provides a self-powered gas sensor, the structure of which is as follows figure 1 As shown, it includes a gas sensor, a triboelectric nanogenerator and a detection circuit arranged in the test chamber 6; the test chamber 6 is provided with an air inlet 9 and an air outlet 10 for the detection gas to pass in and out; the gas The sensitive element adopts a resistive interdigital electrode structure, specifically an interdigital electrode 8 deposited with a gas-sensitive film; The second friction member below the friction member, the first friction member includes a PET film with a thickness of 10 microns to 50 microns and a metal copper film 2 deposited on the upper surface of the PET film 1, and the second friction member includes a thickness of 10 microns. A PTFE film 3 of micron to 50 microns and a metal aluminum film 4 deposited on the lower surface of the PTFE film 3, the first friction part and the second friction part are separated from each other b...

Embodiment 2

[0045] This embodiment provides a method for preparing a self-powered gas sensor, and the specific process flow is as follows:

[0046] (1) The flexible substrate is cleaned with chemical reagents, and the flexible substrate is dried after cleaning.

[0047] (2) The present embodiment adopts the contact-separation type frictional nanometer power generation device as the passive power supply unit, and the triboelectrode sequence of the friction layer used to realize the contact-separation of the contact-separation type frictional nanometer power generation device should have differences, and the contact-separation type The friction part that realizes contact-separation of the type triboelectric nanometer power generation device is preferably a flexible material that is easily disturbed by external force; in this embodiment, PET film is selected as the substrate, and PTFE film 3 and metal aluminum film 4 are selected as the contact-separation parts respectively. The friction lay...

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Abstract

The invention discloses an external force triggered type response enhanced self-powered gas sensor and a preparation method thereof, and belongs to the technical field of sensors. The external force triggered type response enhanced self-powered gas sensor comprises a gas sensitive element, a friction nano power generating device, a detecting circuit, a rectifying device and an ultraviolet light source. An alternating signal output by the friction nano power generating device is converted into a unidirectional output signal by the rectifying device to be connected with an ultraviolet light source disposed directly facing the gas sensitive element and the gas sensitive element. A directional electric field is formed on the surface and the inside of a gas sensitive material, thereby promotingthe resolution of photogenerated carriers and suppressing the recombination of the photogenerated carriers, the quantum efficiency of the light enhancement is improved, and the gas sensitive effect under the ultraviolet radiation is enhanced. The external force triggered type response enhanced self-powered gas sensor not only has a novel structure, but also has a simple preparation process, low processing cost and high practicability, has great promotion to the development of gas sensors, and has great significance for the construction of gas sensor network nodes.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to an external force-triggered response-enhanced self-powered gas sensor and a preparation method thereof. Background technique [0002] Gas analysis is an important link in scientific research, production process and environmental testing. At present, most sensors are powered by external power sources or batteries, and maintenance personnel are required to maintain or replace batteries regularly to ensure the continuous operation of equipment and systems. For sensor network nodes deployed in dangerous areas and extreme environments, this It not only increases the operating cost but also threatens the life safety of maintenance personnel. On the other hand, gas sensors based on traditional inorganic ceramics and metal oxides need to work at high temperatures, and need to be equipped with heaters and additional energy supply. The requirement of gas sensor network work a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/126G01N27/127
Inventor 苏元捷谢光忠杨铂汐李双定姚明亮太慧玲杜晓松黎威志于贺蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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