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Scanning and transceiving integrated remote sensing measuring device and method for motor vehicle exhaust based on TDLAS-based (tunable diode laser absorption spectroscopy-based)

A technology for measuring device and motor vehicle, which is applied in the direction of measuring device, scattering characteristic measurement, color/spectral characteristic measurement, etc., can solve the problems of increasing the error rate and missed judgment rate of measurement results, achieve high-efficiency exhaust emission measurement, and reduce errors rate and miss rate, the effect of high spectral resolution

Pending Publication Date: 2018-08-17
SHANXI ZHONGKE HUAYEE TECH
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Problems solved by technology

However, the location of exhaust pipes of different types of motor vehicles is different, coupled with the randomness of the vehicle's driving position on the road, these will further increase the error rate and missed judgment rate of the measurement results

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  • Scanning and transceiving integrated remote sensing measuring device and method for motor vehicle exhaust based on TDLAS-based (tunable diode laser absorption spectroscopy-based)

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Embodiment Construction

[0027] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, which are only for ease of understanding and are not intended to limit the present invention.

[0028] Such as figure 1As shown, the present invention provides an integrated vehicle exhaust remote sensing measurement device based on TDLAS scanning and sending and receiving, including a laser control unit 101, a laser unit 102, a multi-wavelength beam coupling unit 103, a wavelength locking unit 104, and a concave mirror 105 (using a laser Axial parabolic mirror), rotating regular polyhedron mirror 106 (rotating hexahedron mirror), strip reflective sticker 108, detector 110, detector control unit 111, acquisition and processing unit 112, auxiliary measurement unit 113, industrial computer 114. The lasers in the laser unit are controlled by the laser control unit, so that the output wavelength of each laser scans through the "fi...

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Abstract

The invention relates to a scanning and transceiving integrated remote sensing measuring device and method for motor vehicle exhaust based on TDLAS-based (tunable diode laser absorption spectroscopy-based). Emergence wavelength of lasers covers target absorbing peaks of gas under test through temperature and current control of the lasers; a free light output multi-wavelength coupling unit provideshigh coaxiality or superposition of multiple beams; the coupled beam gains transceiving integration and beam scanning through an off-axis parabolic mirror and a rotating hexahedral reflector; the rotating hexahedral reflector enables the coupled beam to scan exhaust emission plumes and reach strip reflecting stickers on a ground; the transceiving integrated structure focuses light, reflected by the reflecting stickers, to a detector; a detector signal is received and processed by an acquisition processing unit so as to exhaust emission information; the device also includes a wavelength locking unit that locks wavelength of each laser in real time; frequently calibrating a system is not required. The device has high sensitivity and high spectral definition, and is suitable for real-time efficient measurement of exhaust emission.

Description

technical field [0001] The invention relates to the field of remote-sensing measurement of motor vehicle exhaust, in particular to a TDLAS-based scanning and receiving integrated motor vehicle exhaust remote-sensing measurement device and method. Background technique [0002] With the rapid development of the economy, motor vehicle exhaust emissions have become an important source of urban air pollution. The first batch of PM2.5 source analysis results conducted by the Ministry of Environmental Protection show that 15% to 52% of PM2.5 in Beijing, Shanghai and other cities The concentration contribution comes from motor vehicle exhaust emissions. And since 2012, diesel exhaust has been identified by the World Health Organization as a carcinogen. Therefore, fast and real measurement of motor vehicle exhaust emissions is very necessary for air pollution prevention and control. The national "Atmospheric Law" clearly stipulates that since 2016, the exhaust remote measurement of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504G01N21/39G01N21/53
CPCG01N21/3504G01N21/39G01N21/53G01N2021/399
Inventor 魏敏李明星袁松常代有
Owner SHANXI ZHONGKE HUAYEE TECH
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