Piezoelectric measuring element

Details Piezoelectric measuring element Piezoelectric measuring element

1988-11-10

1990-02-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310338, 310329, 310360, H01L 4108

Patent

active

049029266

ABSTRACT:
In piecoelectric measuring elements comprising two or more crystal elements that are jointly subject to the mechanical variable to be measured and are provided with electrically conductive electrodes on opposite surfaces located essentially normal to the electric (x) axes of these crystal elements, disadvantages arising from shearing stresses can be prevented by using crystal elements (2) from crystals of point group 32, in which exist two opposite types of enantiomorphism, l and r, in which part of the crystal elements used belong to one of the two enantiomorphic types l or r, and have one of the two absolute orientations of the x-axis, .alpha..sub.1 or .alpha..sub.2, while the remaining crystal elements belong to the opposite enantiomorphic type and have the opposite orientation of the x-axis.

REFERENCES:
patent: 2410825 (1946-11-01), Lane
patent: 4344010 (1982-08-01), Vig et al.
patent: 4365182 (1982-12-01), Ballato et al.
patent: 4410822 (1983-10-01), Filler
patent: 4568850 (1986-02-01), Ballato
patent: 4604544 (1986-08-01), Konomi et al.
patent: 4667127 (1987-05-01), Krempl et al.

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