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Infrared-ray gas analyser

A gas analyzer and infrared technology, which is applied in the fields of analyzing materials, instruments, and material analysis by optical means, can solve the problems of spectral error, air leakage of micro-acoustic capacitive detectors, and increase in production cost of analytical instruments. The effect of ultra-high stability

Inactive Publication Date: 2004-03-17
索纪文
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Problems solved by technology

[0003] At present, most infrared gas analyzers at home and abroad adopt a dual-light path scheme, that is, a reference light path and a measurement light path. The signals share one optical path. When infrared narrow-band filters of different wavelengths are used, there will be spectrum errors due to different wavelengths and asymmetrical changes in light energy. In addition, the air leakage of the micro-sound capacitive detector and the change of diaphragm tension And other problems will also cause errors in the transmission signal. In order to obtain a certain stability and minimum error for the instrument, manufacturers usually increase the investment in hardware, but this will cause a significant increase in the production cost of the analytical instrument and a large equipment volume. In fact, none of the products can overcome the above three errors at the same time

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Embodiment Construction

[0009] The structure of the infrared gas analyzer of the present invention, as shown in Figure 1, 1 is a light source reflector, 2 is an infrared light source, and the light source reflector 1 is placed on both sides of the infrared light source 2, in a figure-eight shape; 3 is a modulation disc, a modulation disc There are two holes on it, which are respectively equipped with infrared filters for measuring wavelength and reference wavelength, which are driven by 6 motors; 5 is the working air chamber, which is respectively equipped with the inlet and outlet of the measured gas; The auxiliary gas chamber is a sealed tube filled with N2 gas. 5 and 7 are respectively placed on both sides below the modulation disc 3; 8 is a small light cone, which is placed on the other side of the working air chamber and the auxiliary air chamber, and the two small light cones will pass through the 5 working air chamber and the 7 auxiliary air chamber respectively. The light energy of the chambe...

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Abstract

An infrared gas analysis apparatus comprising an illuminating source, infrared source, chopper wheel, operating air room, subsidiary air chamber, electric motor, light cone, solid infrared detector and a display unit. The invention applies a subsidiary air chamber having single light source, double optical paths and four light beam arrangement, which can detect the split spectrum error at any time, achieving ultrastability for the analytical instrument.

Description

[0001] Field [0002] What the present invention discusses is an infrared gas analysis instrument, which belongs to the category of measuring or analyzing the composition of substances by means of measuring the physical properties of substances. technical background [0003] At present, most infrared gas analyzers at home and abroad adopt a dual-light path scheme, that is, a reference light path and a measurement light path. The signals share one optical path. When infrared narrow-band filters of different wavelengths are used, there will be spectrum errors due to different wavelengths and asymmetrical changes in light energy. In addition, the air leakage of the micro-sound capacitive detector and the change of diaphragm tension And other problems will also cause errors in the transmission signal. In order to obtain a certain stability and minimum error for the instrument, manufacturers usually increase the invest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
Inventor 索纪文
Owner 索纪文
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