发明名称 |
Method of operating light curtain with deactivated zone control |
摘要 |
A method of operation of a light curtain system for sensing the intrusion of objects into detection planes which define a protected zone. A group of light beams are strobed from one transmitter in a first direction across a zone to a receiver, and another group of light beams are strobed from another transmitter across the zone to another receiver. Light beams within each group which intersect a desired entry area are deactivated for penetration of a permitted object, and other beams in the groups are enabled to detect intrusion into the objects in portions of the zone which lie around the entry area.
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申请公布号 |
US5281809(A) |
申请公布日期 |
1994.01.25 |
申请号 |
US19920994784 |
申请日期 |
1992.12.22 |
申请人 |
SCIENTIFIC TECHNOLOGIES INCORPORATED |
发明人 |
ANDERSON, E. PETER;ASHFORD, JAMES A.;KLASS, RICHARD |
分类号 |
G01V8/20;(IPC1-7):G01V9/04;G08B13/18 |
主分类号 |
G01V8/20 |
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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