| 摘要 |
A pulse signal generator comprises a magnetic element (1) capable of producing large Barkhausen jumps; a generating unit for generating a magnetic field, which is changed by the object to be detected (5) to cause the magnetic element to produce the large Barkhausen jumps; the generating unit consists of a pair of elongated magnet/yoke combinations (3,6 and 4,7) provided on opposite sides of the magnetic element (1) such that their poles are oriented in opposite directions, forming a detecting area at an end thereof (3A, 4A); a detecting unit (2) for detecting the large Barkhausen jumps to produce a corresponding pulse signal; the magnetic element (1) having a first length between a second length of the magnet/yoke combinations and a half of the second length and provided toward the detecting area; and an adjusting yoke (8) movable along one of the elongated magnet/yoke combinations (3, 6).
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