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Doing some AEB/Collision Avoidance testing - Suggestions?

Discussion in 'Model S: Driving Dynamics' started by Carspotter Daily, Aug 15, 2016.

  1. Carspotter Daily

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    I plan on doing some tests with AutoPilot on and off, and at different speeds/angles. (My ultrasonics aren't doing great because of a minor collision.)

    So far, i'm just going to use a cardboard box with aluminium foil covering the front of it as a "Dummy car".

    I've already tried to use a cardboard person, but that didn't work out too well, i'll dig around for those videos.

    Any suggestions are welcome! I hope to test tomorrow and the next day, and will post videos and photos on Instagram and YouTube as well as here.

    Thanks!
     
  2. Donalee

    Donalee New Member

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    I just recently had an accident and the damage looks like a collision at 30+ mph and it seriously was a tap - as there was no damage to the other vehicle at all. No jolt from the impact as it was not even felt, I thought I stopped the car, until the hood cam up in my face. The air bag did not deploy and I am puzzled. Anxious to see your results. thanks
     
  3. DJung

    DJung Member

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    • Informative x 1
  4. ShockOnT

    ShockOnT Quickish

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    I wonder if something flimsy like cardboard will bounce back the sound waves in the way the car expects? In other words, could there be a material sufficiently flimsy that it was invisible to the ultrasound, but visible to the eye?
     
  5. Max*

    Max* Autopilot != Autonomous

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    He said cardboard covered in foil, and yes foil will reflect the radar waves back.
     
  6. ShockOnT

    ShockOnT Quickish

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    Ultrasound, not radar.
     
  7. Max*

    Max* Autopilot != Autonomous

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    Tesla's ultrasound sensors are only effective to about 16' IIRC. I would expect the radar/camera to be used for object detection for AEB
     
  8. scottm

    scottm Active Member

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    Were you driving a Tesla?

    ..in any event, you pressed the brakes, your car nose-dived and slipped under the rear bumper of the car ahead of you.. it's bumper pushed up into your grill and hood causing it to rise up.

    Also in any event, you're at fault and you probably know that and these ones just suck. Did you get ticketed for following too close or not observing a safe distance in your direction of travel, as well as having your insurance pay for all the damage ahead of you?
     
  9. scottm

    scottm Active Member

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    Are you a testing agency, er, why are you "testing" this? ESPECIALLY if you currently have sensor damage from a collision! Do you know your radar is correctly aligned and not internally damaged at this moment?

    Go for the gusto and replace the cardboard box with a brick wall.. THAT would be cool to see on youtube. Anything less is, meh.
     
  10. ShockOnT

    ShockOnT Quickish

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    The hood pops up automatically during a collision to reduce injury to pedestrian.
    Airbags are dangerous, so only go off when collision exceeds a certain strength. If you didn't face-plant the steering wheel then they did the right thing by not going off.
     
  11. ShockOnT

    ShockOnT Quickish

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    You are right that the ultrasonics are not used for AEB. For anyone curious, this is from the owner's manual for the Model S:
    "The forward looking camera and the radar sensor are designed to determine the distance from any object (vehicle, motorcycle, bicycle, or pedestrian) traveling in front of Model S. When a frontal collision is considered unavoidable, Automatic Emergency Braking is designed to automatically apply the brakes to reduce the severity of the impact."

    Also note that the ultrasonics are used during Summon:
    "Using data from the ultrasonic sensors, Summon maneuvers Model S forward or reverse into a parking space."
     
    • Like x 1
  12. Max*

    Max* Autopilot != Autonomous

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    The hood bonnet is NOT done in the USA. This is only on some (all?) of the international versions.
     
  13. ShockOnT

    ShockOnT Quickish

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    Hmm, interesting. This is from the Australian Model S manual:
    "Some Model S vehicles (depending on date of manufacture) feature a pedestrian protection system that reduces head injuries to pedestrians and cyclists in a frontal collision. If the sensors in the front bumper detect an impact with a pedestrian when Model S is moving between 19 and 53 km/h, the rear portion of the hood automatically raises approximately 80 mm."
     

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