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Conical multifunctional gas sensor

A gas sensor, truncated cone-shaped technology, applied in the field of ion sensors, can solve the problems of large workload, high cost, low efficiency, etc., and achieve the effect of reducing voltage

Active Publication Date: 2021-11-30
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practical applications, sometimes it is necessary to use a laser gas sensor, and sometimes it is necessary to use an ionization sensor. Since the existing above-mentioned two gas sensors cannot be used universally, it needs to be replaced frequently, with a large workload and low efficiency, or a laser sensor can be installed at the same time. Type and ionization gas sensors, the cost is higher

Method used

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  • Conical multifunctional gas sensor
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  • Conical multifunctional gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: A voltage is applied between the electrodes, and five different concentrations of 6ppm, 12ppm, 20ppm, 25ppm, and 30ppm are measured experimentally. 2 The ionization current of S gas, the results are as follows:

[0024]

[0025] A voltage is applied between the electrodes, and the experiment measures five different concentrations of NH at 6ppm, 12ppm, 20ppm, 25ppm, and 30ppm. 3 The ionization current of the gas, the result is as follows:

[0026]

[0027] According to the different slopes of the discharge current-gas concentration fitting line for different concentrations of gases under different voltages, different gas types can be distinguished.

Embodiment 2

[0028] Example 2: A bias voltage of 220V is applied between the electrodes, and an optical path is used to introduce a light beam, and five different concentrations of CO are measured experimentally: 5ppm, 10ppm, 15ppm, 20ppm, and 25ppm 2 The light intensity of the emitted light of the gas at a wavelength of 620nm, the results are as follows:

[0029]

[0030] The concentration of the gas can be judged according to the output light intensity value of the ionization light absorption characteristic peak of the gas with different concentrations.

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Abstract

The invention discloses a frustum-shaped multifunctional gas sensor. The gas chamber is composed of a gap between a solid frustum-shaped conductive transparent glass rod and a hollow metal tube. The tube is connected to the negative electrode of the bias voltage, and a polished surface for reflecting the laser is provided in the space between the carbon nanotube film or the catalyst film. When the transmitter and the laser receiver are used, the laser emitted by the laser receiver is incident obliquely from one end of the solid frustum-shaped conductive transparent glass rod, and is reflected and irradiated on the other end of the solid frustum-shaped conductive transparent glass rod through the multiple reflections of the polished surface. on the laser receiver. The frustum-shaped multifunctional gas sensor of the invention has two functions of a laser gas sensor and an ionization gas sensor.

Description

technical field [0001] The invention relates to a plasma sensor, in particular to a conical multifunctional gas sensor. Background technique [0002] There are two kinds of existing gas sensors, one is a laser gas sensor, and the other is an ionization sensor. The detection principle of the laser gas sensor is: use the laser transmitter to emit laser light to irradiate the measured gas, and the laser receiver receives the laser light after irradiating the measured gas, and analyze and detect the measured gas according to the absorption effect of the measured gas on the laser of a specific wavelength Concentration of gas (such as "TO package laser and gas sensor" whose application publication number is CN 107994456A, "laser gas sensor" whose authorization announcement number is CN 205317667U, "a laser methane gas sensor" whose application publication number is CN 107991238A) ; The detection principle of the ionization sensor is: by applying a voltage between the electrode pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/67
CPCG01N21/67
Inventor 刘怡周炜翔毛心怡张飞翔朱博威阮肖镕屠佳云李健张建锋郜园园易晓梅惠国华
Owner ZHEJIANG FORESTRY UNIVERSITY