Measuring and testing – Speed – velocity – or acceleration – Temperature compensator
Patent
1990-08-16
1993-08-10
Chapman, John E.
Measuring and testing
Speed, velocity, or acceleration
Temperature compensator
73517R, G01P 1511
Patent
active
052338720
ABSTRACT:
An acceleration sensor includes a tubular bobbin only one end of which is fixed to a body whereas the other end is movable relative to the body axially of the bobbin. Supported on the body are magnets for attracting a magnetic member, mounted within the bobbin, to a reference position. A detection member is mounted around the bobbin so as to detect a displacement of the magnetic member from the reference position. A gel can be filled in a receiving space of the body in which the bobbin is received. The body can be of a tubular shape, with covers fixedly secured respectively to opposite ends of the body, in which case opposite ends of the bobbin are disposed in opposed, spaced relation to inner sides of the covers, respectively. The body can be received in a housing, and a circuit board can be received in an auxiliary receiving space in the housing. An acceleration sensing system incorporating such a sensor includes a processing circuit for processing an output of the detection member to output a detection signal representative of the direction and magnitude of the acceleration. The processing circuit has a temperature compensation circuit for compensating for a temperature variation so as to keep the detection signal at a constant level when the acceleration is zero.
REFERENCES:
patent: 4700973 (1987-10-01), Gademann et al.
patent: 4843877 (1989-07-01), Kushida et al.
patent: 4887467 (1989-12-01), Sakuma et al.
patent: 5024087 (1991-06-01), Nagasaki et al.
patent: 5040418 (1991-08-01), Kushida et al.
Kurozu Tomotaka
Kushida Takeo
Ohmura Issei
Takeuchi Mikio
Chapman John E.
Nissan Motor Company Ltd.
Zexel Corporation
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