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計量論壇

標題: 基于協議傳輸的車載OBD采集終端數字計量方法 [打印本頁]

作者: shipucun 時間: 2025-11-28 20:15
標題: 基于協議傳輸的車載OBD采集終端數字計量方法
為保障車載OBD采集終端的量值準確可靠，提高重型柴油車尾氣排放監測和超標篩查治理的效果，提出了一種數字計量方法。介紹了車載OBD采集終端的定義、應用情況和計量現狀，闡述了車載OBD采集終端的校準方法，分別從最大允許誤差的確定和不確定度評定兩方面論證了車載OBD采集終端的計量特性。通過論證得到三個結論：校準裝置發動機實時數據流最大允許誤差取協議規定的數據流精度，車載OBD采集終端的最大允差取校準裝置允差的二倍；校準裝置發動機實時數據流引入的不確定度Urel=1×10-6,■，經車載OBD采集終端不確定度評定測算，滿足U≤MPEV/3的量傳要求；試驗結果表明，車載OBD采集終端示值誤差不超過最大允許誤差，計量性能要求合理，校準方法可操作性強。

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久久伊人一区二区_在线日韩av_欧美男男video_国产精品性做久久久久久