Method and apparatus for changing the sensitivity of a transduce

Details Method and apparatus for changing the sensitivity of a transduce Method and apparatus for changing the sensitivity of a transduce

1992-05-01

1994-02-22

Raevis, Robert

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

7386252, 177164, 324605, G01L 126

Patent

active

052877485

ABSTRACT:
A method of changing the sensitivity of a transducer includes applying to the transducer a cyclic excitation signal. The excitation signal has a number of recurring phases of different amplitudes. The transducer's output signal has a like number of recurring phases, each of which corresponds to a phase of the excitation signal. One of the phases of the output signal is selected for data acquisition. Selection of a different phase changes the effective measuring range of the transducer. Preferably, the excitation signal is an a.c. signal, and the output signal is partially demodulated as part of the selection of a phase for data acquisition.

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patent: 5088330 (1992-02-01), Talmadge
2 Articles; Crystal Semiconductor Conductor, dated May 1989 and Jul. 1991.

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