Combination contact and non-contact sensing edge
US10151131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2017 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Feb 24, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for detecting presence of an external obstacle combining contact and non-contact sensing in a common safety edge of a motorized closure includes a sensing edge with an elongate sheath forming a cavity in which two electrically conductive elements are physically and electrically separated. A control circuit includes an oscillator electrically connected to the conductive elements and that drives each at a drive frequency to establish an electric field. A controller is electrically connected to the first and second conductive elements and determines whether (i) the first and second conductive elements are in electrical contact with one another or (ii) a change to the drive frequency exceeds a threshold value. In response to a finding of either condition (i) or (ii), the controller outputs a signal to initiate or disrupt motion of the motorized closure. Two inductors connected to the conductive elements isolate the oscillator from the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.