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原文传递 Light-Emitting Diode Taxiway Edge Light Photometric Evaluation.

题名：	Light-Emitting Diode Taxiway Edge Light Photometric Evaluation.
作者：	D. Lean; H. Cyrus; N. Brown;
关键词：	light emitting diodes,taxiways s,taxiway edge fixtures;photometric performance, electrical emissions, airfield circuits, light fixtures, intensity, harmonics;airfield lighting test bed
摘要：	The Federal Aviation Administration Airport Safety Technology Research and Development Subteam initiated a long-term study of light-emitting diode (LED) taxiway edge lights. The purpose of this study was to determine and evaluate the photometric performance, durability, and reliability of LED taxiway edge light fixtures. LED taxiway edge lights degrade in intensity over time reducing the visibility to pilots. When this occurs, the LED light must be replaced. However, the exact time to replace the fixture to obtain the highest cost effectiveness is unknown. The goal of this project was to determine how the intensity changes with time and when the lights should be replaced. To do this, 24 LED taxiway edge lights and 6 incandescent lights were installed in a test bed; the latter were used as a baseline for the test. The test objectives were to (1) determine the electrical characteristics of an airfield circuit with LEDs, (2) evaluate the photometric performance of LED taxiway edge light fixtures compared with incandescent taxiway edge light fixtures, and (3) evaluate the maintenance required over time. / Title Note: Technical note. / Supplementary Notes: Prepared in cooperation with Hi-Tec Systems, Inc., Egg Harbor Township, NJ. Sponsored by Federal Aviation Administration, Washington, DC. Office of Airport Safety and Standards. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5301 Shawnee Road, Alexandria, VA, 22312, USA. / NTIS Prices: PC A03 / NTIS In-house Control Codes: dotfaa;12091,1101
报告类型：	科技报告