Method of detecting shock and shock sensor

Details Method of detecting shock and shock sensor Method of detecting shock and shock sensor

1994-09-16

1996-04-23

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

055106668

ABSTRACT:
An electric field equal to at least a coercive electric field is applied to a field-excited phase transition material thereby to bring about a phase transition from an antiferroelectric phase to a ferroelectric phase for thereby causing the field-excited phase transition material to produce a distortion. Then, the electric field applied to the field-excited phase transition material is eliminated while the distortion remains in the field-excited phase transition material. Thereafter, a shock is applied to the field-excited phase transition material to forcibly remove residual distortion from the field-excited phase transition material for thereby causing the field-excited phase transition material to produce an electric signal representative of the shock. The field-excited phase transition material may comprise an electrostrictive material composed of lead, barium, niobium, zirconium, tin, titanium, and oxygen, or lead, niobium, zirconium, tin, titanium, and oxygen, or a piezoelectric/electrostrictive material.

REFERENCES:
patent: 3031591 (1962-04-01), Cary et al.
patent: 3150274 (1964-09-01), Pischinger
patent: 3349259 (1967-10-01), Kistler
patent: 4512431 (1985-04-01), Bloomfield
patent: 5382865 (1995-01-01), Butcher et al.

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