Automobile Exhaust Gas Infrared Radiation Characteristic Measurement System and Measurement Method
A technology for automobile exhaust and infrared radiation, which is applied in the field of measurement systems for the infrared radiation characteristics of automobile exhaust, can solve problems such as insufficient reference, huge complexity, and radiation error of the exhaust itself.
Active Publication Date: 2015-07-29
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
The existing measurement system has the radiation error of the exhaust gas itself. If the gas radiation theory is used to calculate it, it will be quite huge and complicated, and the reference is not enough.
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[0037] according to the present invention figure 1 The composition of the measurement system shown is that the two heating plates with a constant temperature of 60°C and 80°C are made of ordinary PTC constant temperature material, and the relative positions are fixed, and the surfaces of the two are on the same plane. The distance between the gaps is 7.6mm, the instantaneous field of view angle of the infrared imager is 0.6mrad, and the IDMM06731-V3 of Sofradir, France is used, and the distance between the entrance pupil and the heating plate is 6.5m. It is not difficult to conclude that the opening angle of the 7.6mm gap relative to the infrared imager is 1.17mrad. The instantaneous field of view angle of the actual infrared imager is only 0.6mrad. Obviously, the gap between the two heating plates falls on the two pixels on the detector of the infrared imager, which meets the requirements.
[0038] According to the 8-step test method described in the summary of the invention...
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The invention discloses a measurement system and a method for the infrared radiation property of automobile exhaust. The system integrates an infrared imaging instrument, thermostatic PTC material heating plates and a smooth-surface square aluminium box filled with ice blocks, wherein between the aluminium box and the infrared imaging instrument, a 60 DEG C thermostatic PTC material heating plate and a 80 DEG C thermostatic PTC material heating plate are placed close to the aluminium box; the aluminium box and the heating plates are positioned in the viewing field of the infrared imaging instrument, and the clearance between the heating plates is not more than 2 pixels. The image figures on the infrared imaging instrument are sequentially monitored when tail gas or no tail gas passes through the system, so that the automobile exhaust absorption property can be accurately detected, and the concentration of pollutants can be finally analyzed. The measurement system eliminates errors caused by self-irradiation of the automobile exhaust, and can acquire the self-irradiation, transmissibility and emissivity of automobile exhaust except for the concentration of pollutants, thereby providing important parameters for modeling of target properties, as well as reference for design of some plume target observation systems.
Description
technical field [0001] The invention belongs to a measurement system for the infrared radiation characteristics of automobile exhaust, and specifically refers to a measurement system and a measurement method capable of measuring the absorption characteristics of automobile exhaust, self-radiation, transmittance and specific emissivity. Background technique [0002] With the improvement of living standards, cars have become an indispensable means of travel in people's lives. Then, the tail gas discharged during the driving process of automobiles has also attracted more and more public attention. The main components in automobile exhaust are hydrocarbons, carbon oxides, and nitrogen oxides. These gases are not only harmful to human health, but also have a great destructive effect on the earth's atmospheric ozone layer. [0003] As an important source of air pollution, automobile exhaust has received extensive attention. Many people have carried out research work on its char...
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IPC IPC(8): G01N21/17G01N21/59
Inventor 肖喜中王跃明缪斌郎均慰王晟玮庄晓琼鲍智康黄文俊祝昊泽姚祎
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI