Detection instrument for detecting concentration of CO gas
A technology of gas concentration and detectors, which is applied in the direction of measuring fluid pressure, measuring fluid pressure through electromagnetic elements, and using thermometers with electric/magnetic elements that are directly sensitive to heat, etc., which can solve the problem of low measurement accuracy, difficulty in measuring various gases, Problems such as poor stability of the gas detector
Inactive Publication Date: 2012-07-04
WUHAN UNIV OF SCI & TECH
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[0004] At present, domestic gas detection methods include electrochemical methods, optical methods, electrical methods, gas chromatography, etc., each with its own advantages and disadvantages. The main disadvantages are: the gas detector of the electrochemical method has poor stability, low sensitivity, and low anti-interference performance. The gas sensor of the optical method has a small measurement range, it is not easy to measure a variety of gases, and the operation is complicated; the gas sensor of the electrical method has a slow response speed, low sensitivity, and low measurement accuracy; the gas chromatography gas sensor has low measurement accuracy and poor continuity. Great environmental impact
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[0043] Below in conjunction with accompanying drawing and specific embodiment, the present invention is further described, not limiting the scope of protection:
[0044] A detector for detecting the concentration of CO gas, such as figure 1 As shown: the detector includes a display and operation unit 1, an industrial computer 2, a reference voltage source 3, a first single-chip microcomputer 4, a current transmission module 5, a temperature control unit 6, a laser drive circuit 7, a data acquisition unit 8, and a gas pressure sensor 9. DFB LD light source 10, gas temperature sensor 11, optical path and gas chamber system 12, pre-signal processing unit 13, photoelectric sensor 14. figure 1 The connection modes in are respectively expressed as: thick arrows indicate multiple wire connections; thin arrows indicate single wire or single interface connection; hollow arrows indicate 8-bit data wire connection.
[0045] The serial ports COM0 and COM1 of the first single-chip microco...
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The invention particularly relates to a detection instrument for detecting the concentration of CO gas. The technical scheme is that: a first single chip (4) is connected with a display and operation unit (1), an industrial personal computer (2), a reference voltage source (3), a current transmission module (5), a temperature control unit (6), a laser driving circuit (7), a data acquisition unit (8), a gas pressure sensor (9), a gas temperature sensor (11), a light path and gas chamber system (12) and a front signal processing unit (13) respectively, wherein the light path and gas chamber system (12) is connected with the gas pressure sensor (9), the gas temperature sensor (11), a distributed feedback (DFB) laser diode (LD) light source (10) and a photoelectric sensor (14) respectively; the DFB LD light source (10) is connected with the temperature control unit (6) and the laser driving circuit (7) respectively; and the front signal processing unit (13) is connected with the photoelectric sensor (14), the laser driving circuit (7) and the data acquisition unit (8) respectively. The instrument has the characteristics of low cost, high sensitivity, high selectivity, high response speed, capability of analyzing continuously and excellent anti-interference performance.
Description
technical field [0001] The invention belongs to the field of gas detectors. Specifically relates to a detector for detecting the concentration of CO gas. Background technique [0002] With the deteriorating environment, people have realized the importance of protecting the environment. Various environmental pollutions have seriously affected human life, such as the greenhouse effect, ozone layer destruction and atmospheric environmental pollution. In order to analyze the extent, causes and consequences of these pollutions, it is necessary to measure the concentration of different gases in order to take effective measures to eliminate pollution in time. Therefore, improving gas measurement technology is of great significance for environmental monitoring and protection. [0003] CO is one of air polluting gases, and a large amount of CO gas is produced in chemical production and iron and steel smelting. The usual treatment method for CO is: when the concentration of CO exce...
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IPC IPC(8): G01N21/27G01N21/59G01L9/00G01K7/00G08C19/00H01S3/09
Inventor 周凤星陈虎刘振兴章泰刘晓波徐珍王芳
Owner WUHAN UNIV OF SCI & TECH