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That depends on the sensors which are used. Most current ACC systems use radar, which should not be affected by weather but has other problems like high cost, n
by wibr 11y ago
That depends on the sensors which are used. Most current ACC systems use radar, which should not be affected by weather but has other problems like high cost, narrow field of view and you only get speed and distance as data points which are not always easy to interpret correctly. Ideally it's combined with a camera to get more information about the environment like land markings, so that you know if the car in front of you is actually in your lane or just going around the corner in the lane next to you. The camera is obviously prone to glare, raindrops, etc.. When the car ahead changes lanes or exits the freeway, the system will try to find another car as a target vehicle and adapt the speed accordingly to keep a certain timegap, if it can't find a target it will behave like normal cruise control.
- vonmoltke 11y agoA more sophisticated (but expensive) radar sensor could do the job without the camera. A sensor capable of Doppler processing, sweeping, and tied to some sort of platform telemetry (GPS, INS, etc.) could maintain a large and fairly comprehensive situational picture. Add moving target indication to the signal processing and it could form tracks on all other vehicles on the road, which would provide the motion vectors for them without the need for another sensor. You could even use track behavior to detect anomalies in the road, assuming you have multiple tracks. I could go on all day about this (having actually worked on MTI radar for several years), but I have actual work to do. :P