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Distributor Pickup (Hall Effect) Waveform Notes
This form of trigger device is a simple digital ‘on/off’ switch which produces a Square wave output that is recognised and processed by the ignition control module. The trigger has a rotating metal disc with openings; this passes between the electromagnet and the semiconductor. The effect of a magnetic field that is able to pass through one of the ‘windows’ will stop the flow of voltage. When the ‘window’ is closed the flow is reinstated. This action will produce a digital square wave that is understood by the Electronic Control Unit (ECM) or amplifier.
The sensor will have its characteristic three connections which are: a live supply voltage, an earth and the output signal. The square wave when monitored on an oscilloscope may vary in amplitude, this is not thought to be a problem as it is the frequency that is important, not the height of the voltage. When the voltage from the Hall effect trigger drops to zero volts, it fires the coil. This occurs when the ‘window’ on the metallic rotating vane opens.
汽車診斷 | 汽車診斷儀 | 汽車故障診斷儀 | 汽車測(cè)試儀 | 汽車分析儀 | 汽車診斷示波器 | 汽車電路測(cè)試儀 | 汽車電路分析儀 | 發(fā)動(dòng)機(jī)分析儀 | 發(fā)動(dòng)機(jī)綜合分析儀 | 發(fā)動(dòng)機(jī)檢測(cè)中心 | 點(diǎn)火分析儀 | 點(diǎn)火測(cè)試儀 | 汽車傳感器測(cè)試儀 | CAN總線示波器 | LIN總線示波器 | 汽車故障記錄儀 | 汽車傳感器分析儀 | 汽車檢測(cè)儀 | 噴油嘴測(cè)試儀 | 點(diǎn)火線圈測(cè)試儀 | 蓄電池測(cè)試儀 | 發(fā)電機(jī)測(cè)試儀 | 起動(dòng)機(jī)測(cè)試儀 | ABS傳感器測(cè)試儀 | ECU測(cè)試儀 | ECM測(cè)試儀 | 進(jìn)氣真空/壓力測(cè)試儀 | 排氣壓力測(cè)試儀 | 汽車技術(shù)培訓(xùn) | 爆震傳感器測(cè)試儀 | 缺火測(cè)試儀 | 缺缸測(cè)試儀 | 線路測(cè)試儀 | 引出線 | 汽車數(shù)字示波器 | 真空傳感器 | 高壓感應(yīng)測(cè)試頭 | 無分電器點(diǎn)火測(cè)試頭 | 獨(dú)立點(diǎn)火（COP）感應(yīng)測(cè)試頭 | 漏電測(cè)試儀 | 氣缸相對(duì)壓縮測(cè)試 | 電腦測(cè)試儀 | 發(fā)動(dòng)機(jī)控制器測(cè)試儀 | 泄漏測(cè)試儀 | 熒光檢漏 | 超聲波檢漏 | 汽車數(shù)字萬用表 | 電流鉗表 | 電流勾表 | 點(diǎn)火正時(shí)燈 |
