Method for dynamically tuning a seismic transducer
US4259563A · kind A · utility
7Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1979 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Mar 19, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49004
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.