The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 2007
Filed:
Apr. 25, 2005
Friedhelm Altpeter, Susten, CH;
Friedhelm Altpeter, Susten, CH;
Charmilles Technologies SA, Meyrin, CH;
Abstract
A drive device for a load () comprises a device for detecting accidental collisions with a motor (), a first, respectively a second position sensor () disposed upstream, respectively downstream of a transmission assembly () providing first and second values of position. A calculation unit () 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 (x) traversed by the load in a spatial reference frame (x, 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.