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Research of the Automobile Exhaust Detection System Based on ARM9

Author: LiShuJin
Tutor: WangZhaoXia
School: Tianjin University of Technology
Course: Signal and Information Processing
Keywords: Of Lang Bobi Er - 's law ARM9 Linux platform transplantation Fuzzy Reasoning Temperature compensation Device Drivers
CLC: TP368.1;TP274
Type: Master's thesis
Year: 2010
Downloads: 148
Quote: 0
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Abstract


With the development of the national economy , vehicle production is also increasing year by year , and automobile exhaust emissions has become an important factor in air pollution . In order to reduce air pollution and improve air quality , many countries invested a lot of human and financial resources to support research in the field , and the introduction of a new automobile exhaust emission standards , and the urgent requirement for the emergence of a new generation of automobile exhaust testing equipment . Based on full analysis of the current status of the field of domestic the existing automobile exhaust testing equipment , ARM-LINUX platform attempts to develop a new type of thermopile sensor using Lang Bobi Er - the law of the principles of automobile exhaust testing equipment can detect vehicle exhaust carbon monoxide ( CO ) , carbon dioxide (C02) hydrocarbons (HC) These three ingredients , and using chemical sensors to detect oxygen in automobile exhaust (02) , nitrogen oxides (N0 ) gases. In this paper, the design of a comprehensive set of automobile exhaust detection system . Selection of the air chamber structure , light sources , sensors , filters , etc. ; electronic aspects of the design the ARM peripheral circuits , light source control circuit , the signal conditioning circuitry ( amplification, filtering, processing ) , digital-to-analog conversion circuit and LCD display drive circuit . In data processing , we designed a fuzzy temperature compensation scheme , fuzzy compensation study of automobile exhaust testing data errors due to temperature , to ensure measurement accuracy . Images interface and communication interface transplant LINUX operating system on the ARM platform , set up a cross-development environment of the host , and the preparation of the drive as well as the graphical interface program and use UDP communication interface . Verified through simulation and practice in real-time , stability reached the intended target to meet the automobile exhaust emission standards and industry standards for automobile exhaust testing one step further .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system
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