Method, device and system for measuring torsion or bending at a joint between two limbs
US9681826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2011 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Oct 3, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2505/09
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Method, device and system for measuring a degree of torsion or bending of a joint. The method comprises the steps of attaching a sensor (56) to the limbs that are joined by the joint, measuring an output signal of the sensor during torsion or bending at the joint, and a final step of relating said output signal of the sensor to a degree of torsion or bending. The sensor comprises an electrically conductive loop (51), with loop parts that run from one limb to other and back in the loop, the area of said loop at least partially covering both limbs from one limb to the other. The limbs may be limbs of the human or animal body, for instance limbs at a knee. The sensor further comprises an output unit (57) for providing an output signal that is a measure for the inductance of the loop. Calibration data for the sensor may be determined by detecting the output signal of the sensor for a well defined degree of torsion or bending at said joint under static conditions and storing the calibration data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.