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Implementation of a Real-Time Monitoring and Analysis System for Luminous Flux Test in Integrating Sphere

Abstract:

One of the methods to determine luminous efficacy is using an integrating sphere following Illuminating Engineering Society (IES) standards. For obtaining reliable results is necessary to monitor and analyze luminous flux stability using specialized measurement devices reporting the test uncertainty. Although, in most of commercial instruments there is not flexibility to program the needed of the costumer and those which have this flexibility are more expensive even when the quality is similar, adding the fact of many research laboratories have their measurement devices but without an option to develop or integrate in a unique central system. For this reason, in this paper is presented a low cost implementation of a real time monitoring and analysis for luminous flux test at Lighting Laboratory of Instituto de Investigación Geológico Energético (IIGE) of Ecuador, taking measurement devices without protocols information (close systems) and using a method of reverse engineering on it to integrate in a central system controlling by LabVIEW. The Automatic Central System (ACS) is validated using standard lamps and comparing with the manual system using manufacture software showing that ACS could monitor and analyze the data in real time, in contrast with manual system, showing normalized errors less than 1% and an increasing productivity of 50% due to the automatic generation of documentation following IES and ISO/IEC 17025 standards.