Design scheme to increase the gain of strain based sensors in hard disk drive actuators
US6977790B1 · kind B1 · utility
42Cited by
3References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 2002 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Dec 14, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An actuator arm assembly has an actuator arm and an actuator for moving the actuator arm whereby the arm assembly experiences vibrations. The actuator has a body with a recess formed therein, and a strain sensor is fitted essentially inside the recess such that the sensor generates signals correlated to the vibrations. This arrangement produces a high gain boost from the strain based sensor, making an amplifier circuit unnecessary. The sensor signals are used to damp the vibrations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.