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

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

Active Publication Date: 2015-05-13
SHANXI UNIV
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  • Abstract
  • Description
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  • Application Information

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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 dual quartz crystal oscillator spectrum sounder and a gas detection device using the sounder

Method used

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

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Embodiment 2

[0045] Example 2 as figure 2 As shown, the miniature sound resonator is still a tube (exactly the same as the first type of tube), with slits on the upper and lower sides of the tube, the width of the slits is between 0.35mm-1mm, and the tuning fork type quartz crystal oscillator is respectively Insert from the pipe connection, the width of the middle connection of the pipe is less than the distance between the two vibrating arms of the tuning fork (<0.3mm). This method not only has all the advantages of the first method, but also because the tuning fork type quartz crystal oscillator arm can be further inserted into the miniature sound resonator cavity, the coupling is further enhanced. Inside the resonator, the light beam must pass between the two vibrating arms, so this method requires not only fine machining, but also careful optical alignment.

Embodiment 3

[0046] Example 3 as image 3 As shown, the micro-resonator cavity is composed of two thin stainless steel tubes, and two tuning-fork-type quartz crystal oscillators are inserted between the two tubes, and the distance between the top surfaces of the two tuning-fork-type quartz crystal oscillators is between 0.1 mm and 1 mm. This method is equivalent to two discrete stainless steel thin tubes forming a micro-resonant cavity, so fine machining is not required. The tuning-fork-type quartz crystal oscillator arm is inserted into the micro-resonant cavity deeply, so that the Q value of the entire system can be changed from a single The 12000 of the tuning fork crystal oscillator drops to about 4000, so this is a strong coupling method, which further widens the modulation bandwidth. Since the vibration arms of the two tuning fork crystal oscillators are inserted into the micro resonator, the beam must be from between the two vibration arms. By, this approach therefore requires caref...

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Abstract

The invention relates to gas sensing technologies and particularly relates to a double-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 double-quartz-crystal-oscillator spectral phonometer comprises a gas chamber, wherein the gas chamber is located outside a double-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 double-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 double-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 double 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 r...

Claims

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Application Information

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