Sensors for monitoring movements, apparatus and systems therefor, and methods for manufacture and use
US7918801B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2005 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Feb 3, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0219
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Sensors, apparatus, and methods for measuring movements are disclosed. The sensors include input and output windings wound about a common location and an armature is equally positioned relative to both windings movable to vary inductance reactance of the sensor. The mass of the sensor and the ease of movements are such that flexible membranes, such as skin, can be monitored with insignificant interference. The sensor can be included in “Band-aid” bandage arrangement in which the bandage backing can be removed and held in place on skin by the bandage. A monitoring circuit, responsive to the changes in sensor impedance, provides indications of the detected movements. The monitoring circuit includes an arrangement for self-adjusting parameters so that the system can be automatically preset and continually reset. The monitoring circuit includes a power savings arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.