| 摘要 |
PURPOSE:To obtain a ground speed detector which surely detects the speed in the simple structure. CONSTITUTION:The apparatus is provided with a vibration pickup 2F for detecting the vibration of a from wheel 1F, a vibration pickup 2R for detecting the vibration of a rear wheel 1R, a phase delay detecting circuit 3 for detecting the phase delay time of the vibration waveforms detected by the pickups (detecting time difference) DELTAS, and a ground speed operating circuit 4 for operating the ground speed V of the vehicle from the phase delay time DELTAS and the distance L between the front and rear wheels. |
