Method and device for measuring the height of the cutting table
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United States of America Patent
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Jan 16, 2001
Grant Date -
N/A
app pub date -
Jul 28, 1998
filing date -
Jan 30, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for measuring the height of the cutting table of an earth-processing implement or an agricultural implement, such as, for example, a combine harvester, relative to a surface of a ground having crops by means of an acoustic transducer arrangement. The method includes forming the sound signal emitted by the transducer arrangement by a pseudonoise signal covering a predetermined frequency band. Comparing the sound signal with the reflected signal. Mutually delaying the sound signal and the reflected signal until the comparison has reached its optimum. Whereafter, the delay represents a measurement of the distance to the surface of the ground.
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