Method and apparatus for real time remote determining multiple pollutants in vehicle exhaust

A telemetry device and a technology for motor vehicles, which are applied in the fields of environmental science and spectroscopy, can solve problems such as the inability to provide real-time changes in vehicle exhaust emissions, and the difficulty of real-time online monitoring.

Inactive Publication Date: 2003-09-03
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

Although this method can use a computer to simulate the vehicle's driving conditions to detect the exhaust emission, it still needs to sample the exhaust emitted by the vehicle, and it still cannot provide real-time changes in the exhaust emission of the vehicle.
[0005] 3. Since the car is always moving, and the emission of vehicle exhaust pollutants is closely related to the operating conditions of the vehicle, it is very difficult to monitor the pollutants in the vehicle exhaust on-line in real time

Method used

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  • Method and apparatus for real time remote determining multiple pollutants in vehicle exhaust
  • Method and apparatus for real time remote determining multiple pollutants in vehicle exhaust
  • Method and apparatus for real time remote determining multiple pollutants in vehicle exhaust

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Embodiment Construction

[0027] Referring to the accompanying drawings, wherein 1, ultraviolet light source, 2, 6, split beam, 3, optical collimation lens, 4, corner reflector, 5, condenser lens, 7, slit, 8, grating, 9, array detection 10. Infrared light source transmitter, 11. Infrared detector, 12. Infrared tuned diode laser spectroscopy to measure CO, CO2 and ultraviolet differential absorption spectrometry to measure NO, NH and smoke, 13. Electronic control and various gas molecules Calculation and analysis software, 14. Vehicle license plate recognition, vehicle speed acceleration, vehicle body length measurement unit.

[0028] image 3 50MHZ is the tuning line width, and 500MHZ corresponds to the absorption peak width.

[0029] Figure 4Among them, A is the direct absorption spectrum, B is the first harmonic spectrum line, and C is the second harmonic spectrum line. The light beam emitted by the ultraviolet light source 1 passes through the beam splitter 2 which fully transmits the infrared l...

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Abstract

A method and device for real-time remote detection of multiple pollutant components (CO, CO2, HO, HC and smoke) in the tail gas of motor-driven vehicle features that the infrared tuned diode laser spectrum and the ultraviolet differential absorption spectrum are combined, and the differential absorption, narrow pulse scan and second harmonics of infrared tuned diode laser and the holographic raster spectrometer and array detector for ultraviolet differential absorption method are used. Its advantages are high sensitivity, high resolution and dynamic detection.

Description

technical field [0001] The invention belongs to the fields of environmental science and spectroscopy, and in particular relates to a real-time remote measurement device and method for multi-pollution components of motor vehicle tail gas. Background technique [0002] A large amount of harmful exhaust gas emitted by motor vehicles burning gasoline or diesel oil is the main mobile pollution source that pollutes the ambient air. Studies have shown that the pollution caused by motor vehicle exhaust accounts for 80% of the entire urban air pollution. The usual monitoring method for automobile exhaust is to analyze it with conventional instruments after sampling, which cannot fully reflect the real emission of automobile exhaust pollutants. There are two main methods: [0003] 1. Double idling emission method: refers to the method of measuring pollutant emissions at two idling speeds. One of the two idling speeds is the normal idling speed, that is, the idling speed specified in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N21/39G01N35/00
CPCG01N21/39G01N2021/399G01N21/33G01N2021/3155G01N2021/3513G01N2021/1793G01N2021/0314
Inventor 刘文清张玉钧刘建国陆亦怀齐锋谢品华王亚萍涂兴华汪世美魏庆农司福祺
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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