General > General Technical Chat

Electric car for £9500?

<< < (26/29) > >>

coppice:

--- Quote from: tom66 on October 07, 2023, 09:08:12 pm ---Just on the way back from London my ID.3 perceived "something" (I've no idea what) on the M25 as a 100 mph speed limit sign and set the ACC to 100 mph.  I would have thought the software would be smart enough to know the maximum legal limits for certain countries...

I am tempted to attach an OBD11 and code out a lot of these "safety" functions, they're not ready for prime time. The worst one is lane centering on badly marked rural roads, it likes to ditchfind, so you have to be quite firm with the steering wheel to override it.

--- End quote ---
A few months ago driving north on the M! there was a long section of roadworks limited to 50MPH, with many 50 limit signs. Every one my car passed read as 60. They were all clean and clearly printed. The car is normally pretty reliable reading those numbers. The weather was good, and there were no strong reflections which might have affected it. Heaven knows what gets into these systems. Most cars use a mix of limit signs and mapping for their dashboard display of the speed limit. My car shows a faint queued up next limit as I approach a new section of road, based only on mapping (it often comes up before the sign is visible). The actual sign reading seems to be mostly for extra limiting in bad weather or due to road works. Its strange that your car would go above the normal limit, as I assume it will also have that overall mapping.

nctnico:

--- Quote from: tom66 on October 07, 2023, 09:08:12 pm ---Just on the way back from London my ID.3 perceived "something" (I've no idea what) on the M25 as a 100 mph speed limit sign and set the ACC to 100 mph.  I would have thought the software would be smart enough to know the maximum legal limits for certain countries...

I am tempted to attach an OBD11 and code out a lot of these "safety" functions, they're not ready for prime time. The worst one is lane centering on badly marked rural roads, it likes to ditchfind, so you have to be quite firm with the steering wheel to override it.

--- End quote ---
Volkswagen... what do you expect? A couple of years ago I rented a Peugeot which also had automatic speed limit reading. It failed pretty bad while driving in France. Go figure.

tom66:

--- Quote from: nctnico on October 11, 2023, 01:30:53 pm ---Volkswagen... what do you expect? A couple of years ago I rented a Peugeot which also had automatic speed limit reading. It failed pretty bad while driving in France. Go figure.

--- End quote ---

Well, I'm sure the camera system is made by Mobileye or something, VW just integrate it.

I've got a Vauxhall Mokka loaner from Enterprise (no, it wasn't my choice) whilst they repair the bumper on my car - it seems to misread most of the variable speed limit signs around here too.  It also assumes that after 1-2 miles of not seeing any other road sign that it should hide the speed limit in case it has changed, but this isn't very useful as many roads have only occasional repeaters.

It's one of those features that sounds good on paper but the reality is it kinda sucks and it needs more work.

Veteran68:
Well interestingly enough, the speed limit reader on my Audi works very reliably. Surprisingly so. Sometimes it can even determine dynamic zones with different speed limits based on time of day and flashing or not flashing lights (like schools zones). That part is really hit or miss, but for static signs it rarely if ever gets it wrong.

Siwastaja:

--- Quote from: tggzzz on October 07, 2023, 08:30:53 pm ---What's the peak and mean LIDAR output power? How does that compare to eye-safe limits/

--- End quote ---

I don't know exactly in numbers, but what I do know is that industrial LIDARs that have been approved to use in the middle of people (e.g. workers in factory) and where direct eye contact just centimeters apart does no harm, have been demonstrated in use in automotive conditions (e.g., rain) and work fine, too, to distances of at least 100 meters. The problem is mostly in price (and all those nasty engineering details like keeping the sensor glass clean, but apparently they somehow manage to do that with cameras, too.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod