| 摘要 |
PROBLEM TO BE SOLVED: To provide a wheel speed detecting device capable of enhancing the accuracy for detecting wheel speed. SOLUTION: The wheel speed detecting device performs computations using integration on AC signals Vw outputted from a wheel speed sensor. When an AC signal Vw having a phase component is integrated, an integration constant, i.e., a low frequency component serving as an offset component, is generated in the signal. Since the low frequency component is close to the constant, it can be eliminated when a differentiator is disposed at the rear stage, but then the differentiator will amplify high frequency components excessively. In the device, the low frequency components generated in the signals through the integration are eliminated by use of HPF or BPF 14z while the maximum amplification rate of the high frequency components is 0 dB.
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