Exhaust gas measurement method and device based on motor vehicle exhaust remote measurement system
A tail gas and gas technology, applied in measuring devices, color/spectral characteristic measurement, instruments, etc., can solve problems such as difficult to accurately determine the content of components to be measured in tail gas, window interference interference, etc.
Active Publication Date: 2022-02-22
华电智控(北京)技术有限公司
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[0007] This application provides an exhaust gas measurement method and device based on a motor vehicle exhaust remote measurement system to solve the problem that the exhaust gas measurement method in the related art is easy to introduce interference through the window and it is difficult to accurately determine the content of the component to be measured in the exhaust gas question
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[0027] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0029] It should be noted that the terms "first" and "second...
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The application discloses an exhaust gas measurement method and device based on a motor vehicle exhaust remote measurement system. The method includes: obtaining the background light intensity signal and the target light intensity signal measured after the test beam passes through the background space and the exhaust gas; performing Fourier transformation respectively to obtain the first frequency domain signal and the second frequency domain signal; obtaining the first frequency domain signal The amplitude of the peak of the center frequency of the frequency domain signal and the amplitude of the adjacent preset number of peaks, the amplitude of the peak of the center frequency of the second frequency domain signal and the amplitude of the adjacent preset number of peaks, to obtain a plurality of first One value and a plurality of second magnitudes; calculating the difference between the normalized result of each first magnitude and the normalized result of the corresponding second magnitude, and calculating a target sum of squares of the differences; The concentration of the gas of the type to be analysed in the exhaust gas is determined based on the target sum of squares value. The present application solves the problem that the tail gas measurement method in the related art is easy to introduce interference through the window and it is difficult to accurately determine the content of the components to be measured in the tail gas.
Description
technical field [0001] The present application relates to the technical field of exhaust gas measurement, in particular, to an exhaust gas measurement method and device based on a motor vehicle exhaust remote measurement system. Background technique [0002] In recent years, motor vehicle exhaust remote measurement technology has been widely used, and there are various methods of using TDLAS all-laser method to measure exhaust. [0003] In related technologies, TDLAS (Tunable Diode Laser Absorption Spectroscopy, Tunable Diode Laser Absorption Spectroscopy) technology measures exhaust gas by using a sawtooth wave superposition frequency of V The high-frequency sine wave debugging signal of o drives the LD (Laser Diode semiconductor laser), the modulated beam passes through the gas, and is demodulated by the lock-in amplification method V o signal, and based on 2 V oThe signal strength determines the concentration of the exhaust gas. [0004] However, on the one hand, in or...
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IPC IPC(8): G01N21/39G01N33/00
CPCG01N21/39G01N33/0067G01N2021/1793G01N2021/3513
Inventor 姬红波李自丽郭晓鹤王腾飞
Owner 华电智控(北京)技术有限公司