General > General Technical Chat
Tesla teardown finds electronics 6 years ahead of Toyota and VW
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Marco:
The resolution needed to ignore the road and all other static objects at long range is well beyond the current state of the art of car radar systems. Couple firetrucks and a police car disagree with the collision avoidance being much use at highway speeds on Teslas. Also the concrete road divider.

When people look away from the road they need a little adrenaline when they look back and they drifted lanes or see an upcoming obstacle ... the near misses keep you honest. That's why every automated intervention needs to give that same Pavlovian training. It can not be allowed to be convenient, it needs to be annoying. At least until they learn to not run into firetrucks.
David Hess:

--- Quote from: ataradov on February 18, 2020, 05:41:25 pm ---If you look at what aomma.ai can do with a single camera and essentially a cell phone processor, I'm not sure all that dedicated AI hardware is all that necessary.
--- End quote ---

Custom hardware might be required to address long term availability.  High performance cell phone processors are particularly bad about this.

Tesla might also want to avoid leaving their supply chain vulnerable to competitors.  The major car companies have a history of quashing competition by buying their supply chain.
thinkfat:
I thought there would at least be a little beamforming and directing involved, with a phased antenna array. I can't believe it'd work otherwise. Imagine overtaking a truck while the road turns left. If the radar was always looking straight ahead, you'd get a collision warning. Yet, that is not what is happening. The radar seem to look along the road.
coppice:

--- Quote from: thinkfat on February 20, 2020, 08:50:53 pm ---I thought there would at least be a little beamforming and directing involved, with a phased antenna array. I can't believe it'd work otherwise. Imagine overtaking a truck while the road turns left. If the radar was always looking straight ahead, you'd get a collision warning. Yet, that is not what is happening. The radar seem to look along the road.

--- End quote ---
If you look at the specs for most of the car radars they have two transmissions, working concurrently in different bands, with different beam widths. A fairly wide beam, and a very wide beam. How would you expect to build a narrow beam scanning radar at consumer prices?
Marco:

--- Quote from: coppice on February 20, 2020, 09:08:14 pm ---How would you expect to build a narrow beam scanning radar at consumer prices?

--- End quote ---

How about we just give up radar and time of flight? Make 60 GHz cameras with a rectenna array and a metamaterial lens, plus a continuous 60 GHz beam for illumination.

Naive ToF systems are sensitive to interference and complicated systems are hard to do at high resolution. A camera though has a simple structure and with stereoscopy can see depth just fine.
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