2016年12月23日 星期五

lidar, GPS


Galileo, a global navigation satellite system that will reach more places and work more precisely than today’s GPS services, is now available for free public use.

The latest boon for navigation services: a new fleet of satellites is now…
TECHNOLOGYREVIEW.COM|由 LUCAS LAURSEN 上傳



Ford is planning an autonomous ride sharing service in 2021. Having the best lidar will help.

The company that makes the best (and most expensive) lidar systems gets…
SPECTRUM.IEEE.ORG


Velodyne is the name of a trio of Silicon Valley-based technology companies focused on audio equipment, LiDAR, and marine solutions. Wikipedia
Founded1983



lidar 

Pronunciation: /ˈlʌɪdɑː/ 


NOUN

[MASS NOUN]
detection system which works on the principle of radar, but uses light from a laser.
Example sentences
  • Automotive manufacturers are looking at technologies that include radar and lidar to make such measurements, and could have the systems on the market within two or three years.
  • With the combination of GPS and inertial systems, and the use of a lidar (light detection and ranging) system, the plane's exact recording position and precise topographical data on the earth's surface can be ascertained.
  • The pulse energies in the solid-state laser can be higher since these lasers store energy longer and more efficiently than fiber lasers, and this higher power improves the performance of lidar and remote-sensing systems.

Origin

1960s: blend of light1 and radar.
More
  • radar from [M20]:
    This system for detecting objects by sending out radio waves which are reflected back was developed in the 1930s. The name comes from the opening letters of radio detection and ranging, and was coined in 1941. Police started using radar traps to detect speeding motorists in the early 1960s. In the Second World War the myth that pilots ate lots of carrots to help them see in the dark was spread to explain how they could detect enemy planes, as radar was still a secret. Other words have been coined on the pattern of radar, such as lidar (mid 20th century), which works like radar, but uses light from lasers (mid 20th century)—laser itself being an acronym from ‘light amplification by the stimulatedemission of radiation’.

光學雷達英語:lidarLIDARLiDAR),或簡稱光達,是一種光學遙感技術,它通過向目標照射一束,通常是一束脈衝雷射來測量目標的距離等參數。雷射雷達在測繪學考古學地理學地貌地震林業遙感以及大氣物理等領域都有應用[1] 此外,這項技術還用於機載雷射地圖測繪、雷射測高、雷射雷達等高線繪製等等具體應用中。
雷射雷達對物體距離的測量與通常所說的雷達類似,都是通過測量發送和接受到的脈衝信號的時間間隔來計算物體的距離。因此,由於原理上的相似性,儘管雷達的準確定義是使用微波或無線電波等波長較長的電磁波進行檢測測距的設備,雷射雷達這一術語仍然被廣泛使用。

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