| 摘要 |
The arrangement has planar coils (1, 2) for speed detection arranged at a distance up to 10 millimeters from an impulse wheel, and arranged offset to the impulse wheel in a rotation direction, where the impulse wheel is not a magnetic actuator and is compatible. Oscillation frequency of an oscillator is evaluated, and lies in range of fundamental frequency from 20 to 400 megahertz. The planar coils are imprinted on a printed circuit board in multilayer technic. The coils are connected to the oscillator by a multiplexer. |
