| 摘要 |
To detect transition from rolling to sliding of a wheel over a surface, a transducer coupled to the wheel provides output pulses having a repetition rate representative of wheel speed. The pulses are applied to a logic circuit including a pair of multivibrators, one of which has a variable time circuit setting its unstable state in dependence on pulse repetition rate; the rate itself is sensed by applying the pulses from the two multivibrators to a coincidence gate which activates a wheel slip detector (and, if desired, an override control to a brake, or accelerating arrangement for the wheel).
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