4 ms·
LIDAR doesn't work in rain and fog.
by manicdee 10y ago
LIDAR doesn't work in rain and fog.
- stcredzero 10y agoI'm not being a proponent of LIDAR. I'm trying to explain the difference between interpreting 2D visual data as 3D and what a device like LIDAR does. RADAR does work in rain and fog.
- dsfyu404ed 10y agoLooking through rain with LIDAR is like looking through chaff for radar. An X-ray machine wouldn't work very well if there was a cloud of lead dust in the air.
- mannykannot 10y agoDoes any current optical technology work any better in rain and fog? Not that 'optical' is a requirement anyway - what is needed is anything that does work.
- ph0rque 10y agoGround-penetrating radar does: http://news.mit.edu/2016/pinpointing-vehicles-with-high-precision-under-adverse-weather-conditions-0623 http://news.mit.edu/2016/pinpointing-vehicles-with-high-prec...
- izacus 10y agoThe radars other manufacturers use work well - e.g. my Mazda will detect obstacles and start braking even in weather conditions where optical visibility is way worse. Pretty much all other car manufacturers use such radars mounted in front for the adaptive cruise control systems (front) and blind spot monitoring (back).
- Animats 10y agoLIDAR can work quite well in rain and fog with proper processing. There are range gated imagers for that.[1] You tell the imager to ignore anything for a delay of N nanoseconds, and you don't see the fog reflections out to 2N feet. You can run the range gate in and out until you see through the rain and fog. These are available as hand-held devices. This technology was used on ships in fog back in 2004, but now that it's down to hand-held size, it seems to be more of a military thing. There are lots of interesting things you can do with LIDAR that the Velodyne people don't do. "First and last", for example. But enough for tonight. [1] http://www.sensorsinc.com/applications/military/laser-range-gating http://www.sensorsinc.com/applications/military/laser-range-...