Tone wheel sensor tester
First Claim
1. An electrical diagnostic tool for in situ testing of a tone wheel sensor mounted in proximity of a rotatable tone wheel and where the tone wheel sensor produces a periodic pulse train signal as the rotatable tone wheel is rotated, the tool comprising:
- a signal conditioning block for receiving the periodic pulse train signal and generating therefrom a logic-level pulse signal having a frequency;
a digital counter clocked by said logic-level pulse signal and having a plurality of outputs sequentially activated in accordance with a count of logic-level signal pulses; and
a plurality of LEDs each coupled to one of the plurality of outputs of said digital counter, the operational condition of the tone wheel sensor being indicated by a frequency and sequence of illumination of the LEDs by the digital counter outputs.
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Accused Products
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.
10 Citations
20 Claims
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1. An electrical diagnostic tool for in situ testing of a tone wheel sensor mounted in proximity of a rotatable tone wheel and where the tone wheel sensor produces a periodic pulse train signal as the rotatable tone wheel is rotated, the tool comprising:
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a signal conditioning block for receiving the periodic pulse train signal and generating therefrom a logic-level pulse signal having a frequency; a digital counter clocked by said logic-level pulse signal and having a plurality of outputs sequentially activated in accordance with a count of logic-level signal pulses; and a plurality of LEDs each coupled to one of the plurality of outputs of said digital counter, the operational condition of the tone wheel sensor being indicated by a frequency and sequence of illumination of the LEDs by the digital counter outputs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electrical diagnostic tool for in situ testing of a tone wheel sensor mounted in proximity of a rotatable tone wheel and where the tone wheel sensor produces a periodic pulse train signal as the rotatable tone wheel is rotated, the tool comprising:
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a signal conditioning block for receiving the periodic pulse train signal and generating therefrom a logic-level pulse signal having a frequency; a divide-by-N counter clocked by said logic-level pulse signal and generating therefrom a pulse train at a second frequency; a digital counter clocked by said pulse train at said second frequency and having a plurality of outputs sequentially activated in accordance with a count of pulses in the logic-level pulse signal; and a plurality of LEDs each coupled to one of the plurality of outputs of said digital counter, a proper operational condition of the tone wheel sensor being indicated by the LEDs being sequentially illuminated at said second frequency and in accordance with a counting sequence of said digital counter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification