Magnetostrictive multiple position sensing device
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United States of America Patent
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Sep 17, 1991
Grant Date -
N/A
app pub date -
Dec 20, 1989
filing date -
Dec 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A position monitoring device for accurately determining a plurality of distances, velocity or acceleration along a line using a plurality of electromagnets. The position monitoring device includes an ultrasound transducer disposed along a line, an ultrasound generator to provide an ultrasound wave pulse along the ultrasound transducer and a plurality of electromagnets disposed along the line at selected positions. The electromagnets generate a magnetic field which interacts with the ultrasound pulse to generate a reflected pulse. A sensor measures the time lapse between generation of the initial pulse and receipt of the reflected pulse, and electronic components convert the time lapse interval to a position measurement.
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