4 ms·

Tesla already has RADAR. Why would they need LIDAR? The issue isn't with the sensors, but rather the system reacting to sensor data.

toomuchtodo 7y ago
Radar is not sufficient for mitigating this scenario. Too low resolution.
- dsfyu404ed 7y ago
  You can buy much, much nicer radar than Tesla specs for their vehicles. The stuff the DoD buys (or was buying a decade ago) is good enough to tell two basically identical tractor trailers apart based on minor features, dents/dings, etc.
  - toomuchtodo 7y ago
    Then why do automakers who support AEB not spec this radar? The Car and Driver link in my GP post above this specifically demonstrates that Tesla is not immune to failures to detect obstacles in the vehicle's path; it happens across many automakers (Subaru, Toyota, etc).
    - dsfyu404ed 7y ago
      Probably because it hasn't come down in cost yet and/or there's physical limitations involving packaging the receiver. As the long slow march of progress continues it may come down in cost enough to be viable on vehicles.
      - toomuchtodo 7y ago
        Can you share some more links to the radar technology you mention with high resolution and discrimination functionality? I am interested in performing more research on this topic. I'm familiar with several phased array radar platforms, so I might be aware of this specific implementation, but perhaps not!
        dsfyu404ed 7y ago
        https://www.baesystems.com/en-us/product/vehicle-and-dismount-exploitation-radar-exploitation-ground-station-vegs https://www.baesystems.com/en-us/product/vehicle-and-dismoun... As I understand it it's the algorithms that analyze the radar data that are the secret (literally) sauce. I didn't work on any of that. I just plumbed various data from A to B. I don't know much other than it was really damned good for being "legacy" at the time I was working there.
  - JoshTko 7y ago
    Were the tractors moving at different speeds in this test?
    - dsfyu404ed 7y ago
      The test data was recorded during an average day over a medium sized city in the DC ares. So yes.

toomuchtodo 7y ago

Radar is not sufficient for mitigating this scenario. Too low resolution.

dsfyu404ed 7y ago
You can buy much, much nicer radar than Tesla specs for their vehicles. The stuff the DoD buys (or was buying a decade ago) is good enough to tell two basically identical tractor trailers apart based on minor features, dents/dings, etc.
- toomuchtodo 7y ago
  Then why do automakers who support AEB not spec this radar? The Car and Driver link in my GP post above this specifically demonstrates that Tesla is not immune to failures to detect obstacles in the vehicle's path; it happens across many automakers (Subaru, Toyota, etc).
  - dsfyu404ed 7y ago
    Probably because it hasn't come down in cost yet and/or there's physical limitations involving packaging the receiver. As the long slow march of progress continues it may come down in cost enough to be viable on vehicles.
    - toomuchtodo 7y ago
      Can you share some more links to the radar technology you mention with high resolution and discrimination functionality? I am interested in performing more research on this topic. I'm familiar with several phased array radar platforms, so I might be aware of this specific implementation, but perhaps not!
      - dsfyu404ed 7y ago
        https://www.baesystems.com/en-us/product/vehicle-and-dismount-exploitation-radar-exploitation-ground-station-vegs https://www.baesystems.com/en-us/product/vehicle-and-dismoun... As I understand it it's the algorithms that analyze the radar data that are the secret (literally) sauce. I didn't work on any of that. I just plumbed various data from A to B. I don't know much other than it was really damned good for being "legacy" at the time I was working there.
- JoshTko 7y ago
  Were the tractors moving at different speeds in this test?
  - dsfyu404ed 7y ago
    The test data was recorded during an average day over a medium sized city in the DC ares. So yes.