Tuned vibration detector
US4463610A · kind A · utility
13Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Feb 18, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention comprises a vibration sensor for detecting engine knock. The sensor has a tuning mechanism which is mechanically resonant with a preselected vibrational frequency. The resonating movements of this tuning mechanism are adapted to apply varying stress to an associated magnetostrictive element. A magnetic biasing element imparts a magnetization to the magnetostrictive element and a detecting means is associated with the magnetostrictive element for detecting changes in the magnetization caused by the varying applied stress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.