Wheel position detection apparatus and tire air pressure detection apparatus having the same
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United States of America Patent
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Sep 6, 2016
Grant Date -
Jul 9, 2015
app pub date -
Aug 1, 2013
filing date -
Aug 6, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
In a wheel position detection apparatus, a first controlling section of a transmitter repeatedly transmits a frame including specific identification information at a timing when an angle of the transmitter is at a predetermined angle. A second control unit of a receiver receives the frame transmitted from the transmitter, and identifies which of a plurality of wheels the transmitter that has transmitted the frame is attached to. The receiver changes an allowable range of variability in accordance with a road surface condition indicated by a degree of road surface roughness every time the frame is received, and sets the allowable range of variability wider for a road surface that is rough than for a road surface that is not rough.
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