Shock sensor

Details Shock sensor Shock sensor

1997-12-03

1999-10-26

Williams, Hezron

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

7351431, 32420721, G01P 1500

Patent

active

059707941

ABSTRACT:
A shock sensor detects shocks from all directions in a plane. A coil produces a magnetic field. A magnetic fluid is sealed in a closed container located in the magnetic field. A magnetoresistive effect element is also is located in the magnetic field and opposes the magnetic fluid. The magnetic fluid moves relative to the magnetoresistive effect element when the magnetic fluid receives a shock. When the magnetoresistive effect element is subjected to a change in magnetic field, the resistance of the magnetoresistive effect element changes. The magnetoresistive effect element may be formed of four elements in a bridge configuration and the output of the bridge is processed in an output circuit. The output circuit outputs a sensor output when the magnetic fluid moves relative to the magnetoresistive effect element.

REFERENCES:
patent: 3906802 (1975-09-01), Nonaka et al.
patent: 4631954 (1986-12-01), Mills
patent: 4676103 (1987-06-01), Nakajima
patent: 4793241 (1988-12-01), Mano et al.
patent: 4948929 (1990-08-01), Fukushima
patent: 4984463 (1991-01-01), Idogaki et al.

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