Robotic gripper having proximity sensor with off-set sensor
US6441610B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 2001 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Aug 9, 2021 |
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 an 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.