Vibrating beam transducer drive system

Details Vibrating beam transducer drive system Vibrating beam transducer drive system

1990-02-26

1992-05-19

Chapman, John E.

Measuring and testing

Dynamometers

Responsive to force

73517AV, G01L 110

Patent

active

051136988

ABSTRACT:
A drive system for providing different excitation voltages to the separate beams of a multiple beam vibrating transducer is disclosed. In one embodiment of the invention an amplified voltage at the resonant frequency of a master beam is amplified and applied to a secondary beam, to force the secondary beam to vibrate at the resonant frequency and amplitude of the master beam to force the transducer to resonate at the frequency of the master beam. Since the transducer vibrates at the resonant frequency of one of the beams, the transducer energy losses to the adjacent mounting structure are reduced. This results in a higher transducer quality factor so that frequency shifts in the resonant frequency can be readily measured as changes in the parameter that the transducer is intended to monitor.

REFERENCES:
patent: 4299122 (1981-11-01), Ueda et al.

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