Precision solid state position transducer using magnetic fields, method for detecting the position of a spot on an elongate member, and musical instrument
US9679549B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 20, 2016 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Jun 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2220/521
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The position of an elongate member, such as a string of a musical instrument, e.g. a stand-up bass, is detected by creating a radial magnetic field at a spot along the elongate member in which the magnetic field approximates a disk shape with radial field lines that decay as 1/R. R is the distance from the center of the elongate member along a radial field line perpendicular to the axis of the elongate member. Then the position of the spot is detected using magnetic field sensors that are positioned proximal to and on opposite sides of the spot along the elongate member. Electrically amplifying the outputs of the sensors and detecting magnitude and direction of the motion of the spot from the physical orientation of the sensors do this.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.