Apparatus for detecting transducer movement using a first and second light detector
US5055671A · kind A · utility
110Cited by
7References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for photo-optically detecting transducer motion in a transducer using a photodetector elastically suspended inside the transducer housing and photo-optically coupled to a light source. During movement the inertia effect of the photodetector along with the elastic suspension system causes the changes in the photo-optical coupling between the photodetector and the light source. The inertia effect of the photodetector is enhanced by adding a mass to the photodetector. Either the magnitude or the phase of the photodetector output is monitored to detect movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.