| 摘要 |
A method is suggested in detecting magnetic elements with a high magneto-mechanical coupling factor by means of magnetic signals. The elements are exposed to magnetic bias fields affecting the element resonance frequencies, and the element properties affected by the bias fields are detected. The bias field is varied with regard to its magnitude within such intervals, that the presence of elements with known characteristics within the interval is determined, and with regard to its gradient so as to separate existing element positions. The bias field is given a homogeneous nature with alternating field propagation directions, whereby elements located in the same plane are separated.
|
