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Multi-quartz-crystal-oscillator spectral phonometer and gas detection device employing same

A quartz crystal oscillator and detection device technology, which is applied in the field of gas sensing, can solve the problems of low detection sensitivity and cumbersome operation, and achieve the effects of improving detection efficiency, avoiding technical requirements, and increasing bandwidth

Active Publication Date: 2013-06-26
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of low detection sensitivity and cumbersome operation of current gas detection devices, the present invention provides a multi-quartz crystal oscillator spectrum sounder and a gas detection device using the sounder

Method used

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  • Multi-quartz-crystal-oscillator spectral phonometer and gas detection device employing same
  • Multi-quartz-crystal-oscillator spectral phonometer and gas detection device employing same
  • Multi-quartz-crystal-oscillator spectral phonometer and gas detection device employing same

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Experimental program
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Effect test

Embodiment 1

[0039] Example 1 as image 3 As shown, the planes of the vibrating arms of the tuning-fork quartz crystal oscillator 36 are parallel to each other, the distance between the planes is 2mm, and they are arranged along the direction of the beam. The basic structure of this multi-quartz crystal oscillator spectrophone configuration not only improves the detection sensitivity, but also facilitates the alignment and installation of components.

Embodiment 2

[0040] Example 2 as Figure 4 As shown, the length of the miniature sound resonator 33 is 6 mm, the inner diameter is 0.76 mm, and the outer diameter is 1.7 mm; a slit with a width of 0.15 mm and a length of 0.35 mm is symmetrically opened on the left and right sides of the center of the miniature sound resonator 33. This arrangement utilizes the coupling effect between the tuning-fork type quartz crystal oscillator 36 and the miniature sound resonator cavity 33 , and compared with the arrangement of two tuning-fork type quartz crystal oscillators 36 , the detection sensitivity is improved.

Embodiment 3

[0041] Example 3 as Figure 6 As shown, the length of the miniature sound resonator 33 is 5.6mm, the inner diameter is 0.84mm, and the outer diameter is 1.27mm. In the middle part of the miniature sound resonator 33, a slit 331 with a length of 1mm and a width of 0.15mm is opened downward from the top. The slit is aligned parallel to the vibration arm gaps of the three tuning-fork type quartz crystal oscillators 36 , basically runs through the entire miniature sound resonator 33 , and is only connected at the bottom of the miniature sound resonator 33 . This configuration structure has all the advantages of Embodiment 2, and due to the addition of a tuning fork type quartz crystal oscillator 36, the sensitivity is further enhanced, and the quality factor Q is further reduced, so it can be used in a wider modulation frequency range.

[0042] In specific applications, a tuning-fork quartz crystal oscillator 36 with a resonance frequency of 32.768kHz is generally selected.

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Abstract

The invention relates to gas sensing technologies and particularly relates to a multi-quartz-crystal-oscillator spectral phonometer and a gas detection device employing the same. The gas detection device is used for solving the technical problems of low sensitivity and cumbersomeness in operation of existing gas detection devices. The multi-quartz-crystal-oscillator spectral phonometer comprises a gas chamber, wherein the gas chamber is located outside a multi-quartz-crystal-oscillator assembly, and the bottom of the gas chamber is provided with a hole; an entrance window and an exit window are respectively formed in a sidewall of the gas chamber along a light path; and the entrance window, the multi-quartz-crystal-oscillator assembly and the exit window are located on the same light path. The gas detection device comprises a light source and a light source driver connected with the light source; and a light beam focusing device and the spectral phonometer are sequentially arranged on an exit light path of the light source. The gas detection device further comprises a first phase-locked amplifier and a signal generator which are sequentially connected with each other. According to the spectral phonometer and the gas detection device, through the ingenious arrangement of the multi-quartz-crystal-oscillator assembly, the technical problems in current gas detection that the detection sensitivity is low and the frequency of quartz crystal oscillators is required for being measured frequently are solved.

Description

technical field [0001] The invention relates to gas sensing technology, in particular to a multi-quartz crystal oscillator spectrum sound detector and a gas detection device using the sound detector. Background technique [0002] Gas molecules exist in the entire space of human life, and are closely related to human economic, industrial activities, and physical health. With the continuous acceleration of China's industrialization process, the discharge of a large amount of toxic and dangerous gases has seriously affected human health and survival. At the same time, in the fields of petroleum, chemical industry, aerospace, medicine, environment, etc., it is necessary to monitor the derivative gas molecules with high precision and high selectivity to optimize various industrial processes. Gas detection technology based on molecular spectroscopy has gradually attracted people's attention in recent years due to its advantages of high sensitivity, good selectivity, and online re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27
Inventor 董磊贾锁堂尹王保
Owner SHANXI UNIV
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