Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1990-11-19
1993-01-05
Pellinen, A. D.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
200 6145M, 200 6153, 73519, H01H 3514
Patent
active
051773708
ABSTRACT:
An acceleration sensor that comprises a body of non-magnetic construction having a linear internal cavity of uniform cross section, and a pair of permanent magnetics movably mounted within such cavity with like magnetic poles opposed to each other, such that the magnetics are urged to opposite ends of the cavity by force of magnetic repulsion therebetween. At least one weigand wire is positioned externally of the cavity between the cavity ends, and has a longitudinal dimension parallel to the lineal dimension of the cavity. The weigand wire is characterized by two stable magnetic flux-generating states dependent upon application of an external magnetic field of appropriate polarity for switching between such states. An electrical coil is positioned adjacent to the weigand wire, and is responsive to switching between the two flux-generating states for generating a sensor output signal as a result of acceleration forces on either of the magnets sufficient to overcome the force of magnetic repulsion therebetween, and thus to bring one of the magnets into proximity with the wire. Additional magnets preset the weigand wire. Permeable material is used so that the magnetic force on the magnets does not change with a change in the position of the magnets.
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Osborn David
Pellinen A. D.
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