Numerically controlled drive device with device for detecting operating anomalies intended for detecting accidental collisions and method of detecting operating anomalies for this device
US7310560B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2005 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Apr 25, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/42272
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A drive device for a load (18a) comprises a device for detecting accidental collisions with a motor (14a), a first, respectively a second position sensor (15a, 16a) disposed upstream, respectively downstream of a transmission assembly (12a) providing first and second values of position. A calculation unit (20) makes it possible to calculate an error signal (d) corresponding to the difference of these position values. Ways to discriminate are devised so as to analyze the successive error signals as a function of the path (xR) traversed by the load in a spatial reference frame (xR, d). Filters with rectangular spatial window or with exponential spatial window are particularly adapted for discriminating between errors due to an accidental collision and those due to other causes attributable to normal operation. One thus obtains particularly reliable and sensitive collision detection with a very low detection threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.