Differential Hall-effect gear measure feeler
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United States of America Patent
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Oct 27, 1987
Grant Date -
N/A
app pub date -
Dec 11, 1984
filing date -
Dec 15, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The measuring system of the gear measuring feeler contains, as a Hall-effect sensor, two Hall-effect sensor elements which are arranged in opposing relationship to each other in the magnetic field. The differential output signal of this dual Hall-effect sensor is processed in a matching circuit which is designed as a differential amplifier circuit, to yield a measuring voltage with respect to zero volt. This measuring voltage is twice as high as in the case where only one Hall-effect sensor element is used as the Hall-effect sensor. Furthermore, the matching circuit is of a simpler structure and the measurement is substantially more precise since there is not required any reference voltage source in the matching circuit.
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