Re:Alphabet's Self-Driving Cars to Get Their First Real Riders
by joshuamorton on Tuesday April 25, 2017 @03:59PM
(#14197424)
>Quick, what's the reaction time for Waymo's driverless cars? Support your answer with evidence.
>For extra credit: describe what the reaction time is for Waymo's driverless cars are during various points of the garbage collection cycle.
Aight, I'm not familiar with Waymo's cars specifically, but with <10K in hardware (maybe <5K now) you can design and build an autonomous vehicle kit that has a reaction loop that runs at a soft floor of 15 adjustments per second. I'm sure that with better hardware you can increase that to 60+, and 15 per second is already about 5x better than human reaction time, and fast enough that it can react to changes every 6 feet at highway speeds, and every foot at neighborhood speeds. A 60 aps loop means that its recalculating everything every 2 feet your car travels on the highway.
And yes, this isn't incredibly difficult.
For reference, in my experience, running 2 cameras and a low power lidar (along with associated outputs to hardware actuators and such) off of a 2013 (or maybe a 2011) macbook pro, the limiting factor was always the lidar's 15fps framerate.
>For extra credit: describe what the reaction time is for Waymo's driverless cars are during various points of the garbage collection cycle.
Aight, I'm not familiar with Waymo's cars specifically, but with <10K in hardware (maybe <5K now) you can design and build an autonomous vehicle kit that has a reaction loop that runs at a soft floor of 15 adjustments per second. I'm sure that with better hardware you can increase that to 60+, and 15 per second is already about 5x better than human reaction time, and fast enough that it can react to changes every 6 feet at highway speeds, and every foot at neighborhood speeds. A 60 aps loop means that its recalculating everything every 2 feet your car travels on the highway.
And yes, this isn't incredibly difficult.
For reference, in my experience, running 2 cameras and a low power lidar (along with associated outputs to hardware actuators and such) off of a 2013 (or maybe a 2011) macbook pro, the limiting factor was always the lidar's 15fps framerate.