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Dual-antinode-stimulated quartz-enhanced photoacoustic spectrophone and gas detection device

A technology of photoacoustic spectroscopy and sound detectors, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of low detection sensitivity, and achieve the effects of enhanced detection sensitivity, reduced power consumption, and high-efficiency utilization

Active Publication Date: 2017-06-06
SHANXI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the detection sensitivity of the primary overtone mode of the existing tuning-fork quartz crystal oscillator is not high, and to provide a double-antinode excited quartz-enhanced photoacoustic spectrometer and gas detection device

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  • Dual-antinode-stimulated quartz-enhanced photoacoustic spectrophone and gas detection device
  • Dual-antinode-stimulated quartz-enhanced photoacoustic spectrophone and gas detection device

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] like image 3 As shown, a double-antinode-excited quartz-enhanced photoacoustic spectrometer in this embodiment includes a vertically arranged tuning-fork-type quartz crystal oscillator 1, and a miniature sound resonator I2 that matches the tuning-fork-type quartz crystal oscillator 1 , a miniature sound resonator II3 and a support 5 for fixing the tuning fork type quartz crystal oscillator 1, the miniature sound resonator I2 and the miniature sound resonator II3; the arm length of the tuning fork type quartz crystal oscillator 1 is 17mm, and the distance between the vibrating arms is 700μm, The aspect ratio of the vibrating arm is 17; each of the miniature sound resonance chambers is composed of a pair of stainless steel capillary tubes 4 horizontally arranged on both sides of the tuning fork type quartz crystal oscillator 1 and perpendicular to...

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Abstract

The invention relates to a dual-antinode-stimulated quartz-enhanced photoacoustic spectrophone and a gas detection device. According to the spectrophone and the gas detection device, the problem that a primary overtone mode of an existing tuning fork type quartz crystal resonator is low in detection sensitivity is solved. According to the technical scheme, the dual-antinode-stimulated quartz-enhanced photoacoustic spectrophone comprises a tuning fork type quartz crystal resonator, a miniature sound resonant cavity I, a miniature sound resonant cavity II and a bracket, wherein the tuning fork type quartz crystal resonator is vertically arranged, the miniature sound resonant cavity I is matched with the tuning fork type quartz crystal resonator, and the bracket is used for fixing the tuning fork type quartz crystal resonator, the miniature sound resonant cavity I and the miniature sound resonant cavity II; and the miniature sound resonant cavity I and the miniature sound resonant cavity II are arranged at gaps between resonant arms of the tuning fork type quartz crystal resonator and are in positional superposition with two vibration antinodes generating upward once overtone vibration along the resonant arms of the tuning fork type quartz crystal resonator. The dual-antinode-stimulated quartz-enhanced photoacoustic spectrophone and the gas detection device have the advantage of high sensitivity.

Description

technical field [0001] The invention belongs to the technical field of a photoacoustic spectrum gas sensor head and a gas detection device, and in particular relates to a double-antinode excited quartz enhanced photoacoustic spectrum sound detector and a gas detection device. Background technique [0002] Quartz-enhanced photoacoustic spectroscopy is a variant of traditional photoacoustic spectroscopy. It is a very practical technology that can be used in many fields such as environmental monitoring, industrial process control and medical analysis. Quartz-enhanced photoacoustic spectroscopy differs from traditional photoacoustic spectroscopy in that it uses a tuning-fork quartz crystal oscillator with a high quality factor instead of a microphone to detect the sound waves generated by the target gas after absorbing the excitation light. The spectrophone of quartz-enhanced photoacoustic spectroscopy mainly includes a tuning-fork quartz crystal oscillator and a miniature sound...

Claims

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Application Information

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IPC IPC(8): G01N21/17
CPCG01N21/1702G01N2021/1704
Inventor 董磊郑华丹贾锁堂
Owner SHANXI UNIV
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