Retroreflective sheeting is similar to a sticker: it is flexible, has an adhesive backing, and has a variety of color options readily available. Here's an illustration from a supply company - the yellow stripes with thinner reflective silver bands on them are combined performance bands. Traffic signs are made by applying retroreflective sheeting to a metal frame. Retroreflective material reflects light back to the source when light shines on it." This dictionary definitions page includes all the possible meanings, example usage.
The object’s brightness depends on the intensity of the light striking the object and the materials the object is made of. Definitions for retroreflective r tro rflk tvretroreflective. Retroreflective materials appear brightest to observers nearest the light source (such as a motorist). Combined performance material is considered part of the background for purposes of total area required. Retroreflection occurs when a surface returns a large portion of directed light beam back to its source. The color of the background material and the combined-performance material can either be fluorescent yellow-green or fluorescent orange-red. Retro-reflective sensors can typically operate up to about 10m distance, while diffuse sensors usually work over much shorter ranges. "The basic high-visibility garment includes three components: background material, retroreflective material (bands), and combined-performance material (a combination of retroreflective and fluorescent material that may separate the two). In terms of operating distance, through-beam sensors have the advantage of the longest range, often working at 30m or more. You also learned about the different sensing. You learned that all three sensors use light to detect objects and all three sensors have output signals that trigger a PLC input. Retroreflective signs use a surface that reflects light back to a light source making them easy to see during heavily overcast days and at dawn, dusk or night. High-visibility garments are worn by people working in environments where they need to be seen to be safe (people wearing reflective vests and helmets on train tracks and highways with traffic, for example).įrom the American National Standard for High Visibility Safety Apparel & Headwear: Here are the details, including the meaning, point value, and more about the Scrabble word RETROREFLECTIVE.Below. In review, by reading this article you have learned about the three basic types of Photoelectric Sensors: Through-Beam, Retroreflective, Diffused.
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