Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Patent
1998-08-07
2000-07-18
Callahan, Timothy P.
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
702138, B60C 2300
Patent
active
060920289
ABSTRACT:
A signal processor comprises wheel speed-detecting means for detecting a wheel speed signal including vibrational components of a tire, extraction means for extracting a resonant frequency of the vibrational components of the tire or a tire spring constant based on the wheel speed signals, air pressure-estimating means for estimating a tire air pressure based on the resonant frequency or the tire spring constant, and determining means for determining whether the estimated tire air pressure is abnormal or not by comparing with a determination value. Further, correcting means corrects at least one of the determination value, the estimated tire air pressure, the resonant frequency and the tire spring constant in response to a tire temperature. A temperature-sensing device is mounted inside the signal processor to detect a temperature associated with the tire temperature.
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Inoue Yuichi
Kabune Hideki
Naito Toshiharu
Onogi Nobuyoshi
Taguchi Takeyasu
Callahan Timothy P.
Densco Corporation
Nguyen Linh
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