Gripper with coiled sensor wire
US6545465B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity sensing assembly for sensing the proximity of a metallic workpiece to a work holding device includes Hall-effect sensor. The magnetic field generated by the magnet is altered when a metallic workpiece is in close proximity to a magnet. Due to an offset relationship between the sensor and the poles of the magnet, the polarity detected by the Hall-effect sensor is analogous to a reversal when a metallic workpiece is proximate the magnet rather than simply detecting a change in strength. Thus the polarity detected by the Hall-effect sensor sends a clearly defined signal indicating the presence or absence of a workpiece in the work holding device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.