Data processing: measuring – calibrating – or testing – Measurement system – Performance or efficiency evaluation
Reexamination Certificate
2005-04-12
2005-04-12
Assouad, Patrick (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Performance or efficiency evaluation
C702S056000, C702S145000, C702S147000, C073S146000, C701S070000, C340S426330
Reexamination Certificate
active
06879938
ABSTRACT:
A tire burst predicting device which can predict occurrence of bursting of a tire and gives an alarm properly is provided. A break point frequency is estimated on the basis of time series data of wheel speed detected at a wheel speed sensor from frequency response of a first order model to which a transmission characteristic from a road surface disturbance to a wheel speed is approximated. A braking force gradient corresponding to the estimated break point frequency is estimated, on the basis of a map, which is prestored, representing a relationship between break point frequencies and braking force gradients. Extra high frequency components are eliminated from the estimated braking force gradient by a low pass filter to reduce estimation dispersion. Differentiators detect changing speed of the braking force gradient. An alarm is given when there is a possibility of bursting of tire when the detected changing speed reaches or exceeds a predetermined threshold value.
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Asano Katsuhiro
Kamiya {umlaut over (K)}azuhiro
Mori Yukio
Naito Toshiharu
Ohashi Hideki
Assouad Patrick
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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