发明名称 |
Method and apparatus for using optical signal time-of-flight information to facilitate obstacle detection |
摘要 |
One or more optical signals (wherein at least some of a plurality of optical signals are at different angles of travel with respect to one another and are directed towards an area comprising a movable barrier-controlled point of passage) create reflections when striking passageway boundaries as correspond to a given movable barrier. Obstacles in the pathway also give rise to reflections. By determining a time-of-flight for such reflections, one can detect a likely presence of an obstacle in such a pathway. Pursuant to one approach, such time-of-flight information can further provide information regarding a likely size of such an obstacle. |
申请公布号 |
GB2424719(B) |
申请公布日期 |
2009.04.29 |
申请号 |
GB20050021652 |
申请日期 |
2005.10.24 |
申请人 |
THE CHAMBERLAIN GROUP, INC. |
发明人 |
ROBERT J OLMSTED;JAMES J FITZGIBBON |
分类号 |
E05F15/20 |
主分类号 |
E05F15/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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