Hirose Electric Company, Ltd.

Akihiro Gotoh

Tomoaki Ito

Shoji Oyama

A pulse signal generator comprises a magnetic element (,) capable of causing a large Barkhausen jump, a detector for detecting a change of magnetic field in the magnetic element, a magnetic field source (,) for magnetizing the magnetic element in a predetermined direction and a permanent magnet (,). The pulse signal generator further comprises an auxiliary member (,) provided such that the magnetic element is flanked between the permanent magnet and the auxiliary member and is in a magnetic field between the permanent magnet and the auxiliary member. The magnetic field varies with movement of an object (,) to be detected with respect to the permanent magnet to produce a magnetic change in the magnetic element which is detected by the detector to produce a pulse.

Motion detection by pulse signal generation

A pulse signal generator comprises a magnetic element capable of causing a large Barkhausen jump, a detector provided in relation to the magnetic element, a magnetic field source provided in the vicinity of the magnetic element to produce a biasing magnetic field which causes a predetermined magnetization of the magnetic element, and a magnetic circuit forming member provided in the vicinity of the magnetic element to produce a main magnetic field which cause a large Barkhausen jump in the magnetic element such that movement of the object to be detected changes the main magnetic field of the magnetic circuit forming member thereby causing a large Barkhausen jump to provide a pulse signal.

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Tokyo, Japan

Akihiro Gotoh