Tone wheel sensor tester
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United States of America Patent
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-
Sep 26, 2006
Grant Date -
Dec 1, 2005
app pub date -
May 28, 2004
filing date -
May 28, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An electrical diagnostic tool for in situ testing of a tone wheel sensor mounted in proximity of a rotatable tone wheel. The tone wheel sensor produces a periodic pulse train signal as the rotatable tone wheel is rotated. The tool has a signal conditioning block for receiving the periodic pulse train signal and generating therefrom a logic-level signal having a frequency. A digital counter has a plurality of outputs and is clocked by the logic-level signal. A plurality of LEDs controlled by the digital counter are used to determine the operational condition of the tone wheel sensor by sequentially illuminating the LEDs at the frequency and in accordance with a counting sequence of the digital counter.
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