| 摘要 |
<p>Disclosed is a magnetic head for detecting soft and hard magnetic characteristic signals. The magnetic head comprises a shielding case and at least one magnetic core unit disposed in the shielding case. The magnetic core unit is provided with a permanent magnet in each magnetic head gap thereon, and magnetic lines of force with a constant amount are generated in each magnetic path of the magnetic head unit. Both a soft magnetic material and a hard magnetic material on an object to be detected can cause rearrangement of the magnetic lines of force in the magnetic path, thereby resulting in variations of magnetic flux, producing an induced electromotive force, outputting detection signals, and enabling the present invention to carry out detection on the soft and hard magnetic characteristic signals. Compared with the prior art, the present invention only additionally arranges the permanent magnets, and has the advantages of simple structure and stable performance.</p> |
