描述
測(cè)試時(shí),ABS的旋轉(zhuǎn)系統(tǒng)被驅(qū)動(dòng)系統(tǒng)帶動(dòng)以任意方向恒定的速度旋轉(zhuǎn)。對(duì)于MK60型ABS傳感器,就是指在沒有制動(dòng)力的情況下,以恒速139.5r/m旋轉(zhuǎn)。如圖2所示,分別在接點(diǎn)①和②間(UB)給傳感器施加12Vdc和3.3Vdc電壓,在旋轉(zhuǎn)中連續(xù)進(jìn)行兩次測(cè)試,每次測(cè)試都要保證測(cè)試完整的一周。當(dāng)ABS傳感器感應(yīng)到發(fā)號(hào)片,就產(chǎn)生方波的波峰,否則產(chǎn)生波谷,使用115Ω的高精度電阻R取得電壓US。當(dāng)UB為12V時(shí),根據(jù)所測(cè)得的電壓值計(jì)算出方波的頻率、電流峰值IH的最大值和最小值、電流谷值IL的最大值和最小值以及信號(hào)的占空比。如圖3所示,當(dāng)UB為3.3V時(shí),根據(jù)所測(cè)得的電壓值計(jì)算出極對(duì)數(shù)和極距間隙。如果這些值在許可的范圍內(nèi),就可以判定ABS傳感器是合格的。
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