Monitoring system and method
First Claim
1. A lighting fixture monitoring unit comprising:
- a housing;
a sensor configured within said housing in a galvanically isolated communication with at least a portion of a wiring of a lighting fixture, said portion of the wiring disposed outside of the housing; and
a microprocessor receiving output information from the sensor and outputting monitoring data indicative of a status of the lighting fixture,wherein said output information received from the sensor is based at least on said galvanically isolated communication with said portion of said wiring disposed outside of the housing.
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Accused Products
Abstract
System and method for monitoring electrical devices such as luminaires, including ballast and/or battery powered lighting components, for variety of fault conditions from central location utilize monitoring unit that interfaces with host lighting fixture or luminaire to allow status of host to be remotely monitored. Monitoring unit can interface with host in fully galvanically isolated manner using current transformers allowing host lighting fixture to be monitored in the least intrusive manner. Monitoring unit can be seamlessly fitted to new luminaires or existing luminaires. Current transformer interface has minimal effect on host ballast functionality and operation. Monitoring system may include a plurality of monitoring units multi-dropped on a single field bus network or in a power line communication. Power for monitoring unit can be derived from field bus network or power line. Operating parameters and addressing information of monitoring unit may be configured via interface using laptop or PC.
161 Citations
30 Claims
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1. A lighting fixture monitoring unit comprising:
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a housing; a sensor configured within said housing in a galvanically isolated communication with at least a portion of a wiring of a lighting fixture, said portion of the wiring disposed outside of the housing; and a microprocessor receiving output information from the sensor and outputting monitoring data indicative of a status of the lighting fixture, wherein said output information received from the sensor is based at least on said galvanically isolated communication with said portion of said wiring disposed outside of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A lighting system comprising:
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a light source; a ballast connected to AC mains and providing power to the light source; a wiring electrically interconnecting the light source, the ballast and the AC mains; a field bus; and a monitoring unit comprising a housing, an electrical connection to the field bus, and an interface with at least one of the light source and the ballast, wherein the monitoring unit is powered by the filed bus via the electrical connection, and detects a status of the at least one of the light source and the ballast via the interface, the interface including a galvanically isolated connection of a sensor configured within said housing with at least a portion of the wiring disposed outside of the housing of the monitoring unit, and the detected status is based at least on said galvanically isolated connection with said portion of the wiring disposed outside of the housing of the monitoring unit. - View Dependent Claims (14, 15)
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16. A lighting system comprising:
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a plurality of light sources; a plurality of ballast connected to AC mains and providing power to the respective light sources; a plurality of wirings electrically interconnecting each of the light sources and respective ballasts, and the AC mains; a field bus; and a plurality of monitoring units each comprising a housing, an electrical connection to the field bus, and an interface with the respective at least one of light sources and the ballasts, wherein each of the monitoring units is powered by the filed bus via the electrical connection, and detects a status of the respective at least one of the light sources and the ballasts via the interface, the interface including a galvanically isolated connection of a sensor configured within said housing with at least a portion of the wirings interconnecting the respective at least one of the light sources and the ballasts, and the AC mains, said portion of the wirings disposed outside of the housing of the respective monitoring unit, and the detected status is based at least on said galvanically isolated connection with said portion of the wirings disposed outside of the housing of the respective monitoring unit. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A lighting system comprising:
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a light source; a ballast connected to AC mains and providing power to the light source; a wiring electrically interconnecting the light source, the ballast and the AC mains; a power line communication master; and a monitoring unit comprising a housing, an electrical connection to the power line, and an interface with at least one of the light source and the ballast, wherein the monitoring unit detects a status of the at least one of the light source and the ballast via the interface, the interface including a sensor configured within said housing in a galvanically isolated connection with at least a portion of the wiring disposed outside of the housing of the monitoring unit, and the detected status is based at least on said galvanically isolated connection with said portion of the wiring disposed outside of the housing of the monitoring unit, and the monitoring unit communicates the detected status to the power line communication master in response to a polling request from the power line communication master. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A monitoring method comprising:
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disposing a monitoring unit with respect to a wiring of an electrically powered device, said monitoring unit comprising a housing and a sensor configured within said housing of the monitoring unit; sensing an AC current signal of said wiring of the electrically powered device via a galvanically isolated communication of said sensor with at least a portion of the wiring of the electrically powered device, said portion of the wiring disposed outside of the housing of the monitoring unit; converting the sensed AC current into a DC voltage for analogue to digital signal conversion and averaging processing, and deriving from the averaging processing monitoring data indicative of a status of the electrically powered device; and outputting the monitoring data indicative of the status of the electrically powered device. - View Dependent Claims (30)
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Specification