Electric lamp and discharge devices: systems – Plural load device systems
Patent
1998-05-06
2000-02-15
Philogene, Haissa
Electric lamp and discharge devices: systems
Plural load device systems
315224, 315308, 315155, 250214AL, 364165, H05B 3700
Patent
active
060256796
ABSTRACT:
An illumination control system uses two photocells, one directed toward an illuminated lamp and the other directed from the ceiling downwardly into the illuminated zone. A feedback signal is derived from the two photocell signals and a reference intercept signal. The feedback signal and a reference set point signal are input into an error amplifier. The error amplifier generates a control signal for setting the illumination in controlled lamps. The photocell signals are variously scaled to provide balancing between them and matching with the intercept signal. Scaling factors and intercept signal level arc set in a calibration procedure that establishes feedback circuit response consistent with a design set point transfer function.
REFERENCES:
patent: 4234820 (1980-11-01), Widmayer
patent: 4236101 (1980-11-01), Luchaco
patent: 5668446 (1997-09-01), Baker
patent: 5701058 (1997-12-01), Roth
Electric Power Research Institute, "Photoelectric Control of Daylight-Following Lighting Systems, Daylight-Sensing Photocell Placement", Report No. EPRI CU-6243, Research Project 2285-3 Final Report, Mar. 1989, prepared by Lawrence Berkeley Laboratory, pp. iii to 10-1.
Pacific Gas & Electric, Research and Development, Automatic Lighting Controls Demonstration: Long-term Results, Customer Systems Report 008.1-91.21, pp. ii to A-2.
Harper Raymond G.
Kavounas Gregory T.
Anderson Edward B.
Harper Raymond G.
Kavounas George T.
Philogene Haissa
LandOfFree
Lighting space controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lighting space controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lighting space controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1908314