Apparatus for sensing operating shock on a disk drive
US5235472A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Oct 18, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A shock load detection device mounted on a disk drive unit. The detection device is comprised of a piezoelectric polymer film encapsulated and electrically shielded by a metallic or metallic coated package. Electrical contacts are provided for on the piezoelectric polymer film and are connected to amplification and comparator circuitry which issues a write fault signal upon detection of external force in excess of a predetermined threshold. The shock sensor may be mounted on the computer disk drive of the unit in such a manner as to be at a 45.degree. angle to each of the x, y and z axis of the orthogonal coordinate system so that linear and torsional forces may be monitored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.