发明授权
- 专利标题: Lighting system having photocontrol and fault monitoring capabilities
- 专利标题(中): 照明系统具有光控制和故障监控功能
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申请号: US12768142申请日: 2010-04-27
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公开(公告)号: US08310159B2公开(公告)日: 2012-11-13
- 发明人: William Joseph Bigge , Daniel Leland Bragg , Li Li
- 申请人: William Joseph Bigge , Daniel Leland Bragg , Li Li
- 申请人地址: US TX Houston
- 专利权人: Cooper Technologies Company
- 当前专利权人: Cooper Technologies Company
- 当前专利权人地址: US TX Houston
- 代理机构: King & Spalding LLP
- 主分类号: H01J7/24
- IPC分类号: H01J7/24
摘要:
A photocontroller operates one or more lamps, such as a GU24 compact fluorescent lamp, based on ambient light to provide dusk-to-dawn operation. The photocontroller includes a photosensor for detecting the level of ambient light. The photosensor provides a signal to a photocontrol circuit that controls a switching device to selectively provide power to the lamp based on the level of ambient light detected by the photosensor. A fault detection circuit monitors the level of ambient light and the status of the lamp to determine whether the photocontroller is operating properly. The fault detection circuit determines the status of the lamp based on current flow to the lamp as determined by a current sensor. In addition, the photocontroller can include a processor for performing certain photocontrol and fault monitoring functions.