Method for dynamically tuning a seismic transducer

Details Method for dynamically tuning a seismic transducer Method for dynamically tuning a seismic transducer

1979-03-19

1981-03-31

Goldberg, Elliot

Electric heating

Metal heating

By arc

219121LB, 219121LW, 29593, B23K 2610, B23K 2608

Patent

active

042595630

ABSTRACT:
A spring-suspended, moving-coil transducer to be tuned is mounted on a dynamic test fixture and excited by an oscillatory driving force calculated to drive the transducer at a desired resonant frequency. A laser beam, sensitive to a difference between the actual resonant frequency of the transducer and the desired resonant frequency, is focused on the spring. The energy of the laser beam alters the elastic constant of the spring by trimming or etching material therefrom until the difference between the actual resonant frequency of the transducer and the desired resonant frequency is eliminated.

REFERENCES:
patent: 2939079 (1960-05-01), Willmore
patent: 3766616 (1973-10-01), Staudte
patent: 3833999 (1974-09-01), Budych et al.
patent: 4017965 (1977-04-01), Brutsch et al.
patent: 4131484 (1978-12-01), Caruso et al.
patent: 4154530 (1979-05-01), Connolly, Jr. et al.
patent: 4184062 (1980-01-01), Schmidt
Western Electric Technical Digest, No. 29, Jan. 1973, pp. 7-8, "Control of Laser Trimming of a Thin-Film Phase-Shifting Circuit," by F. M. Barlage.

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