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原文传递 Assisted Night Vision for Motorists in Highway Construction Zones: Phase I.

题名：	Assisted Night Vision for Motorists in Highway Construction Zones: Phase I.
作者：	PATANGIA, H. C.
关键词：	CONSTRUCTION SITE TRAFFIC CONTROL; MOTOR VEHICLE DRIVERS; NIGHT VISION; TRAFFIC CONTROL DEVICES
摘要：	The goal of the project is to develop a low cost solution to provide a light emanating active reflector along the length of jersey barriers in construction zones. The project investigates two different technologies: Electroluminescent (EL) and Light Emitting Diode (LED) technologies. The EL technology is well known for its energy efficiency; however it requires a high voltage ac driver. The LED technology can be operated from a low voltage dc, but their power requirement is higher. For driving EL lamps, an efficient dc-ac inverter was researched and developed for the application. For the LED driver, Pulse Width Modulation (PWM) technique was employed to minimize power consumption. The systems were assembled at a construction zone in Hot Spring for field-testing. Fifteen lamps of each kind were installed on the barriers and powered from a 12V battery. The batteries were charged in the daytime through two solar panels (15' x 19'y), one for each system. Electrical data were gathered for a period of more than three months. Both technologies performed well electrically, produced the desired effects, and solar power requirements were met. However the enclosures for the lamps needed further refinement to withstand the harsh conditions of UV, rain and humidity.
报告类型：	科技报告