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Does anyone know how Lidar would work in the future when many other vehicles are also using lidar? From working with some different types of photo sensors (CCD
by torpfactory 7y ago
Does anyone know how Lidar would work in the future when many other vehicles are also using lidar?
From working with some different types of photo sensors (CCD, avalanche photodiodes, photomultiplier tubes), you might imagine that incident light from another car's emitter would be much brighter than the reflected light the lidar sensors are reading and cause saturation.
- toomuchtodo 7y agoPhase lock or introducing jitter to laser timings. Check out Animats' comments on this topic, it's where I've learned from regarding this.
- torpfactory 7y agoThanks!
- salty_biscuits 7y agoI've only got experience with aerial survey lidar, but "blinding" the photomultiplier with your own transmit pulse is pretty common, e.g. hitting something retroreflective like a cats eye marker or a street sign. Even the sun off a puddle can do it too. It is a pretty obvious artifact to recognize and remove. I guess it would depend on the mechanism of the lidar (i.e. if it is scanning then what is the probability that the different cars are scanning at each other at the same time, probably low). Might be a problem if they use flash or geiger mode lidar. But then the pulse rate would be lower. Interesting to think about. I'm sure the people working on it would have an answer.
- CamperBob2 7y agoProbably the same way GPS satellites avoid jamming each other: modulate the lidar transmitter with a unique coded sequence that can be detected by correlation.