汽車尾氣成分動態檢測技術研究
劉建春
摘 要：針對汽車尾氣成分動態檢測的需要，設計不分光紅外檢測氣室、控制系統及上位機軟件，開發出簡易瞬態工況檢測儀。該控制系統以ARM7為核心，傳感器信號經放大、A/D轉換等調理后實時顯示尾氣各成分的濃度并存儲。檢測儀經USB接口把檢測數據傳遞給工控機，利用上位機軟件對各成分濃度、流量進行統計，分析出汽車在各工況的排放等。經實驗驗證：該檢測儀可滿足動態檢測各工況尾氣成分和流量的需要，檢測結果直接決定環保標志的發放，方便實用。
關鍵詞：簡易瞬態工況；尾氣；檢測；ARM7；USB接口
中圖分類號：X830.2；X734.201；TM930.12；TP277 文獻標志碼：A 文章編號：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
