search coil having a plurality of coils for improving search ability

摘要

by using a plurality of individual coils are disclosed for the detection coil with improved detection capabilities . Specifically, to detect the sensor in accordance with an aspect of the present invention includes a winding coil N times in a plurality of mutually spaced core and a plurality of cores at regular intervals . The invention may use a plurality of individual coils to improve the sensitivity of the detection coil without significant change in weight or size . And by connecting an even number of individual coils wound in series , it is possible to reduce the noise in the common mode , it is possible to perform more accurate detection . ;