Gas circuit system for measuring automotive tail gas in real time
A gas path system and real-time measurement technology, applied in the direction of transmittance measurement, sampling device, etc., can solve the problems of complex exhaust emission, real-time monitoring of exhaust emission, and difficult sampling, so as to achieve safe and reliable repeatability, stable sampling, good repeatability
Active Publication Date: 2012-09-05
WUHAN TIANHONG INSTR
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Problems solved by technology
Due to the complex traffic environment such as the road surface during the driving of the car, the exhaust emission is affected by many factors, which makes the exhaust emission complex and makes sampling difficult.
Due to the existence of the exhaust gas sampling problem, the exhaust emission has not been able to be monitored in real time
However, the technology of sampling the exhaust emissions of automobile engines in real time has not been reported yet.
Method used
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[0034] The method of the present invention will be further described in detail below in conjunction with the drawings and the embodiments of the present invention.
[0035] figure 1 It is a schematic diagram of the principle and embodiment of the gas circuit system for real-time measurement of automobile exhaust gas of the present invention, such as figure 1 Shown: When using the system, insert the sampling head 1 into the exhaust pipe of the car. The high-power suction pump 9 is started, the solenoid valve 7 is opened in the measuring position, the exhaust gas passes through the air filter 2 to filter out the coarse particles in the exhaust gas; then, the filtered exhaust gas enters the gas-water separator 3 to remove the water and gas. The dried tail gas is separated to obtain the dried tail gas; the dried tail gas is then passed through the second-stage particle filter 6, and is pumped into the gas constant flow system by the suction pump 9 (including the suction pump 9, the ...
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The invention discloses a gas circuit system for measuring automotive tail gas in real time, mainly comprising a sampling system, a water draining system, a gas exhausting system, a zero calibration system and a standard sample calibration system. The automotive tail gas is sampled in real time by the sampling system, thick particles in the sampled automotive tail gas is filtered out after the sampled automotive tail gas sequentially passes through the water draining system and the gas exhausting system, and simultaneously water and gas separation is realized to obtain the dried tail gas; thesecondary filtering is carried out after the dried tail gas passes through the gas exhausting system to obtain the purified tail gas; the obtained purified tail gas is introduced into a non-scattering infrared measuring system to be performed with indicator detection, such as the concentrations of carbonic oxide, carbon dioxide and carbon hydrogen compound and the like; and additionally, the standard calibration and the zero calibration of the system can be realized by the zero calibration system and the standard sample calibration system so as to ensure the measuring precision. The gas circuit system of the invention has the advantages of stable, accurate and well-repeatable sampling, safety, reliability and the like.
Description
Technical field [0001] The invention relates to an environment monitoring equipment, in particular to a gas path system for real-time measurement of automobile exhaust gas. Background technique [0002] As one of the most important means of transportation in modern society, automobiles have brought great convenience to people’s lives and work, but the exhaust gas emitted by automobiles has become another source of air pollution besides soot-type air pollution. . Correspondingly, the total emissions of automobile pollutants are rising rapidly. All large and medium-sized cities across the country are deeply affected by automobile exhaust pollution. Therefore, it is of great significance to protect the human living environment by detecting automobile exhaust pollution. [0003] With the increase of motor vehicles and the improvement of people's environmental awareness, my country has formulated series of national standards such as GB3842-83, GB7258-87, and GB1495-79 on exhaust emiss...
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IPC IPC(8): G01N21/61G01N1/22
Inventor 李虹杰井传发陈力潘启俊李建新李立朱战军胡婷婷
Owner WUHAN TIANHONG INSTR