Magnetic tilt sensor with permanent magnet surrounding magnetic

Details Magnetic tilt sensor with permanent magnet surrounding magnetic Magnetic tilt sensor with permanent magnet surrounding magnetic

1988-06-20

1989-12-05

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

33364, 324262, G01B 714

Patent

active

048855359

ABSTRACT:
There is proposed a tilt sensor in which a first permanent magnet having a magnetic fluid adhered to its surface is housed in a nonmagnetic case, a magnetic sensing element is arranged outside a bottom portion of the case, and a second permanent magnet is arranged so as to surround the magnetic sensing element and have polarity directions opposite to those of the first permanent magnet. When the case is tilted at an angle larger than a predetermined angle, the first permanent magnet is instantaneously moved, and the magnet sensing element detects changes in magnetism, thereby detecting a tilt of the case.

REFERENCES:
patent: 3252057 (1966-05-01), Hoeppel
patent: 3305805 (1967-02-01), Tann
patent: 3397347 (1968-08-01), Hoeppel
patent: 4282484 (1981-08-01), Morrow
patent: 4316145 (1982-02-01), Tann
patent: 4442405 (1984-04-01), Andrejasich et al.
patent: 4694247 (1987-09-01), Meili et al.

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