Bad weather data could help autonomous vehicles see
Sensors that operate in Scotland's rain, snow and fog are providing data that could help autonomous vehicles see and operate safely in adverse weather.
Aug 9, 2021
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Sensors that operate in Scotland's rain, snow and fog are providing data that could help autonomous vehicles see and operate safely in adverse weather.
Aug 9, 2021
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Amazon.com Inc. has won U.S. permission to use radar to monitor consumers' sleep habits.
Jul 12, 2021
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In the OmniConnect project, Fraunhofer researchers are working with other partners on networking objects in indoor areas. They are doing this using radar beams and passive tags that are attached to moving objects, but also ...
Jul 2, 2021
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Within seconds after reaching a city, earthquakes can cause immense destruction: Houses crumble, high-rises turn to rubble, people and animals are buried in the debris.
May 26, 2021
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Artificial intelligence (AI) has sped up the process of detecting flooded buildings immediately after a large-scale flood, allowing emergency personnel to direct their efforts efficiently. Now, a research group from Tohoku ...
Apr 16, 2021
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At busy transport hubs where cars mix with cyclists, buses, and streetcars, it can be impossible for drivers to keep track of everything around them. A radar sensor system could solve this problem by issuing an early warning ...
Apr 1, 2021
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U.S. Naval Research Laboratory experts created and tested 3-D-printed antennas and arrays to advance radar technology and enable new applications for the U.S. Navy.
Feb 11, 2021
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A satellite carrying a camera that is so powerful it can capture an image of virtually any object on Earth with crystal-clear resolution is now offering its services to the public.
Ever get caught up in a pileup or have a near miss with one during bad weather? Researchers in Poland have created smart road signs that use built-in Doppler radar, video, and acoustic radar and weather stations to monitor ...
Dec 7, 2020
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A new kind of radar could make it possible for self-driving cars to navigate safely in bad weather. Electrical engineers at the University of California San Diego developed a clever way to improve the imaging capability of ...
Nov 18, 2020
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Radar is an object detection system that uses electromagnetic waves to identify the range, altitude, direction, or speed of both moving and fixed objects such as aircraft, ships, motor vehicles, weather formations, and terrain. The term RADAR was coined in 1941 as an acronym for radio detection and ranging. The term has since entered the English language as a standard word, radar, losing the capitalization. Radar was originally called RDF (Radio Direction Finder, now used as a totally different device) in the United Kingdom.
A radar system has a transmitter that emits microwaves or radio waves. These waves are in phase when emitted, and when they come into contact with an object are scattered in all directions. The signal is thus partly reflected back and it has a slight change of wavelength (and thus frequency) if the target is moving. The receiver is usually, but not always, in the same location as the transmitter. Although the signal returned is usually very weak, the signal can be amplified through use of electronic techniques in the receiver and in the antenna configuration. This enables radar to detect objects at ranges where other emissions, such as sound or visible light, would be too weak to detect. Radar is used in meteorological detection of precipitation, measuring ocean surface waves, air traffic control, police detection of speeding traffic, and by the military.
This text uses material from Wikipedia, licensed under CC BY-SA