Piezoelectric measuring element for measuring mechanical variabl

Details Piezoelectric measuring element for measuring mechanical variabl Piezoelectric measuring element for measuring mechanical variabl

1995-02-23

1996-09-24

Williams, Hezron E.

Measuring and testing

Speed, velocity, or acceleration

Temperature compensator

310361, H01L 4108

Patent

active

055579680

ABSTRACT:
To improve temperature compensation of a piezoelectric element measuring mechanical variables, such as pressure, force, and acceleration, with two or more piezoelectric crystal elements, at least one of the crystal elements differ from the other crystal element(s) either physically or chemically, the positive temperature coefficient of a piezo-coefficient of at least one piezoelectric crystal element compensating the negative temperature coefficient of the other crystal element(s), so that the overall piezoelectric sensitivity of the measuring element will remain essentially constant within a given temperature interval.

REFERENCES:
patent: 4016437 (1977-04-01), Calderara et al.
patent: 4344010 (1982-08-01), Vig et al.
patent: 4568850 (1986-02-01), Ballato
patent: 4950937 (1990-08-01), Ballato et al.

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