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    • 8. 发明授权
    • Wheel speed and acceleration detection immune to disturbance
    • 车轮速度和加速度检测免受干扰
    • US4670852A
    • 1987-06-02
    • US632657
    • 1984-07-20
    • Shouichi MasakiKimio TamuraNoriyuki NakashimaTeruyoshi WakaoKen AsamiKazunori Sakai
    • Shouichi MasakiKimio TamuraNoriyuki NakashimaTeruyoshi WakaoKen AsamiKazunori Sakai
    • B60T8/173B60T8/66G01P3/489G01P11/00G01P15/00
    • G01P3/489B60T8/173B60T2210/14
    • A pulse signal is generated by a wheel speed sensor with a frequency proportional to the speed of rotation of a vehicle wheel, the pulse signal comprising a plurality of frames each having a series of a predetermined number of pulses which are tended to be affected by noise and pulse mutilation. Pulses in each frame are counted and from the count is derived an instantaneous wheel speed value. The difference between the successively derived instantaneous speed values is taken and compared with a predetermined threshold. A first or a second indication is given in response to the difference being lower or higher than the threshold, respectively. If the first indication is given, output signals representing the average wheel speed and average wheel acceleration of the wheel are derived from the instantaneous speed values of successive frames. If the second indication is given, the instantaneous speed value of the previous frame is used instead of the instantaneous value of the subsequent frame which is disturbed by noise or pulse mutilation to derive the output signals.
    • 脉冲信号由具有与车轮的转速成比例的频率的车轮速度传感器产生,该脉冲信号包括多个帧,每个帧具有预定数量的脉冲倾向于受噪声影响 和脉冲切割。 对每个帧中的脉冲进行计数,并从计数得出瞬时轮速值。 取出连续导出的瞬时速度值之间的差并与预定阈值进行比较。 响应于差分分别低于或高于阈值来给出第一或第二指示。 如果给出第一指示,则表示轮的平均车轮速度和平均车轮加速度的输出信号从连续帧的瞬时速度值导出。 如果给出第二指示,则使用前一帧的瞬时速度值而不是被噪声或脉冲切断所干扰的后续帧的瞬时值来导出输出信号。