Temperature-controlled photo-acoustic absorption spectrum measuring apparatus
An acoustic absorption and spectroscopy technology, applied in the field of gas photoacoustic absorption spectroscopy measurement devices, can solve the problems of poor temperature uniformity and large volume, and achieve the effects of high uniformity, small volume and high stability
Inactive Publication Date: 2013-07-03
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0004] The present invention mainly provides a temperature-controllable low-temperature photoacoustic absorption measurement device with simple structure, high sensitivity, strong temperature controllability and good temperature uniformity, which is used to measure the photoacoustic absorption spectra of atmospheric molecules and aerosols at different temperatures, Overcome the shortcomings of the existing temperature-controllable direct absorption spectroscopy sample cell, such as large volume and poor temperature uniformity
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[0018] see figure 1 , figure 2 and image 3 (include Figure 3-1 , Figure 3-2 , Figure 3-3 )
[0019] The main body (1) of the photoacoustic pool is provided with a through acoustic resonant cavity (5), the two ends of the acoustic resonant cavity (5) are connected with buffer cavities (6) and (7), and the periphery of the main body (1) of the photoacoustic pool is surrounded by An electric heating band (39); a photoacoustic detector slot (44), a thermistor slot (40) and an air inlet (42) are provided on the photoacoustic pool main body (1); the thermistor slot (40 ) is equipped with a thermistor (41), the photoacoustic detector slot (44) leads to the acoustic resonant cavity (5) wall, and a photoacoustic detector (41) is installed in the photoacoustic detector slot (44) The air inlet (42) communicates with the buffer cavity (6) or (7); the outer circumference of the photoacoustic pool main body (1) is surrounded by a cooling water circulation tank for cooling the pho...
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The invention discloses a temperature-controlled photo-acoustic spectrum photo-acoustic cell apparatus, comprising a photo-acoustic cell body (1) and a heat-insulation box (2) for placing the photo-acoustic cell body (1), wherein before the heat-insulation box (2) is sealed, the photo-acoustic cell body (1) should be firstly sealed inside the heat-insulation box (2) with heat-insulating material.The photo-acoustic cell body (1) is provided with a built-in acoustics resonant cavity (5), the right and left ends of which are connected with a cushion chamber (6) and a cushion chamber (7). The photo-acoustic cell body (1) is peripherally provided with a cooling water circulation groove and peripherally surrounded by an adjustable electric-heating zone (39), enabling the temperature of the photo-acoustic cell body (1) to be adjusted between minus 40 DEG C and 90 DEG C, with temperature-controlling precision being 0.1 DEG C. The photo-acoustic spectrum photo-acoustic cell apparatus of the invention features low cost, easy operation, wide temperature-adjusting range, and high stability, and can receive satisfactory result when measuring or studying atmosphere molecule absorption within operational temperature range.
Description
technical field [0001] The invention relates to a temperature-controllable gas photoacoustic absorption spectrum measurement device, in particular to a photoacoustic spectrum photoacoustic pool device whose temperature in an acoustic resonant cavity can be continuously controlled from -40°C to +90°C. Background technique [0002] The continuous absorption of atmospheric molecules and aerosols not only has weak absorption signals, but also has temperature-dependent characteristics. Studying and measuring the absorption line characteristics of various molecules and aerosols at different temperatures has important application value and significance. Long-range spectroscopy is mainly used to measure the continuous absorption of atmospheric molecules and aerosols. For long-range technology, it is not only difficult to realize its temperature control, but also the system will be very complicated, and it is difficult to achieve high temperature stability. In addition, for a large ...
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IPC IPC(8): G01N21/01G01N21/31
CPCG01N21/1702G01N2021/1704
Inventor 袁怿谦牛明生刘琨高晓明侯再红吴毅
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI