摘  要：針對(duì)汽車尾氣成分動(dòng)態(tài)檢測(cè)的需要，設(shè)計(jì)不分光紅外檢測(cè)氣室、控制系統(tǒng)及上位機(jī)軟件，開發(fā)出簡(jiǎn)易瞬態(tài)工況檢測(cè)儀。該控制系統(tǒng)以ARM7為核心，傳感器信號(hào)經(jīng)放大、A/D轉(zhuǎn)換等調(diào)理后實(shí)時(shí)顯示尾氣各成分的濃度并存儲(chǔ)。檢測(cè)儀經(jīng)USB接口把檢測(cè)數(shù)據(jù)傳遞給工控機(jī)，利用上位機(jī)軟件對(duì)各成分濃度、流量進(jìn)行統(tǒng)計(jì)，分析出汽車在各工況的排放等。經(jīng)實(shí)驗(yàn)驗(yàn)證：該檢測(cè)儀可滿足動(dòng)態(tài)檢測(cè)各工況尾氣成分和流量的需要，檢測(cè)結(jié)果直接決定環(huán)保標(biāo)志的發(fā)放，方便實(shí)用。
關(guān)鍵詞：簡(jiǎn)易瞬態(tài)工況；尾氣；檢測(cè)；ARM7；USB接口
中圖分類號(hào)：X830.2；X734.201；TM930.12；TP277     文獻(xiàn)標(biāo)志碼：A      文章編號(hào)：1674-5124（2013）05-0006-05
Design of dynamic testing system for automotive exhaust components
LIU Jian-chun， SHAO Ming-liang
（Department of Mechanics Engineering，Xiamen University of Technology，Xiamen 361024，China）
Abstract: For the need of dynamic vehicle exhaust composition detection， the authors designed non-dispersive infrared gas detection chamber， control system and PC software， and developed a simple transient detector. The control system takes ARM7 as the core， the signal of sensor is amplified and conversed by A/D module， and each concentration of exhaust component is displayed and stored in real time. The data produced by detecting instrument were transferred to the computer through USB interface， the statistics of each component concentration and flow was carried out through PC software， and the emission of the car in different conditions was analyzed. The experimental results showed that the instrument can dynamically detect gas composition and flow for cars in different working conditions. The test results directly determine the environmental issue， and the method is convenient and practical.
Key words: sample transient working condition； exhaust gas； test； ARM7； USB interface