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Ionization chamber of photoionization gas detecting instrument based on printed circuit board process

A gas detector and printed circuit board technology, applied in circuits, electrical components, instruments, etc., can solve the problems of large volume, short optical path length, insufficient gas ionization, etc., and achieve the effect of small volume and ensuring optical path length.

Active Publication Date: 2012-01-18
ZHONGBEI UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, usually because the gas concentration is very small, the design of the ionization chamber of the photoionization gas detector directly determines the sensitivity of the detector. The ionization chamber of the existing photoionization gas detector has a large volume and a short optical path length. The gas entering the ionization chamber is not sufficiently ionized

Method used

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  • Ionization chamber of photoionization gas detecting instrument based on printed circuit board process
  • Ionization chamber of photoionization gas detecting instrument based on printed circuit board process
  • Ionization chamber of photoionization gas detecting instrument based on printed circuit board process

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Embodiment Construction

[0012] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0013] The ionization chamber of the photoionized gas detector based on the printed circuit board technology of the present invention is composed of two identical electrode plates stacked, such as figure 1 and figure 2 As shown, the electrode plate includes a copper layer 1, a central vent hole 2, a pad 3, a ceramic substrate 4, and a ground layer 5. The three pads 3 are respectively provided with a first via hole 31, a second via hole 32, and a third via hole. The via hole 33, the ground layer 5 is located on one side of the first via hole 31, the copper layer 1 and the ceramic substrate 4 surround the central air hole 2, the three pads 3 are located on the ceramic substrate 4, and the opposite sides of the two electrode plates are in contact , the ground layers of the two electrode p...

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Abstract

The invention discloses an ionization chamber of a photoionization gas detecting instrument based on a printed circuit board process, which is formed by placing two electrode plates which are the same completely in an overlapped way. The thickness of the ionization chamber of the photoionization gas detecting instrument based on the printed circuit board process is the sum of the thicknesses of the two electrode plates; each electrode plate comprises three welding pads; the three welding pads are respectively provided with a first through hole, a second through hole and a third through hole; the back surfaces of the two electrode plates are in contact with each other; the two electrode plates are mechanically fixed and electrically connected by respectively placing one contact pin in the first through hole, the second through hole and the third through hole; one contact pin is connected with an offset electrode; another contact pin is connected with a collecting electrode; and the third contact pin is grounded. By using the ionization chamber of the photoionization gas detecting instrument based on the printed circuit board process, a small enough volume is guaranteed, and an enough optical path length is also ensured, so that the gas entering the ionization chamber is adequately ionized.

Description

technical field [0001] The invention relates to an ionization chamber of a photoionization gas detector, in particular to an ionization chamber of a photoionization gas detector based on a printed circuit board process. Background technique [0002] The photoionization gas detector is a gas detector based on the principle of photoionization for detecting volatile organic compounds or other toxic and harmful gases. It can not only be embedded in a gas chromatograph to directly measure trace hydrocarbons in the atmosphere, but also in Indoor air quality detection, industrial process detection, drug and explosive detection, battlefield biochemical warfare agent monitoring, fire protection, anti-terrorism, aerospace and other fields also have a wide range of applications, and it has also become a real-time detection of pollution, trace detection and environmental protection. A powerful tool in terms of However, usually because the gas concentration is very small, the design of ...

Claims

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Application Information

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IPC IPC(8): H01J47/02G01N27/64
Inventor 梁庭刘俊牛坤旺薛晨阳杨芳王凯张文栋熊继军
Owner ZHONGBEI UNIV
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