Apparatus for determining the distance from a predetermined point to a target
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United States of America Patent
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-
Feb 4, 1986
Grant Date -
N/A
app pub date -
Feb 23, 1983
filing date -
Feb 23, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for determining the distance from a preselected point to a target. An electrostatic ultrasonic transducer in a special protective housing is used with a single-pulse, square-wave transmitter to compare a main signal with a calibration signal. A warning signal indicates when the number of signals actually received during each one hundred signals sent drops below a predetermined percentage. Noise is minimized by careful spacing and shaping of the calibration bar and by insulating foam in the housing.
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Cited Art Landscape
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