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Right front sonar sensor(s) less sensitive on the highway?

Discussion in 'Model S: User Interface' started by gordo, Mar 9, 2016.

  1. gordo

    gordo Member

    Joined:
    Jan 16, 2015
    Messages:
    214
    Location:
    CA
    I've noticed pretty consistently over the past while under many driving conditions that my right front sonar sensor(s) have a tendency to miss nearby obstructions (cars, trucks, medians) much more often than the other three when I'm on the highway. It *will* come on, but it seems that there has to be an obstruction very close by and sustained, whereas the other three seem much more sensitive. For what it's worth, I don't notice anything unusual from the sensors when parking in my garage.

    My question is, does anyone else notice this quirkiness (i.e. maybe it's just a universal software thing) or am I the only one? (i.e. perhaps one or more of my right front sonar sensors are defective...)

    Here's a pretty common sight to help illustrate (I know it's not conclusive since you can't see the actual road, but this condition is quite common when I pass a car on the right side --right rear sonar triggers, but right front doesn't):
    File_000.jpeg
     
  2. mach.89

    mach.89 Member

    Joined:
    Jan 10, 2016
    Messages:
    33
    Location:
    Los Angeles
    Quirkiness is probably the best way I could describe my sensor depiction as well. Or, perhaps I don't understand the way they're supposed to function. But I've noticed that sometimes my sensors won't display any proximate objects, even when I have a car passing me in another lane, or driving very close to a center dividing wall on a freeway. It's almost like it works as I would expect it about 75% of the time. My car is kept very clean, so it can't be dirty sensors.
     
  3. anxman

    anxman Member

    Joined:
    Dec 21, 2014
    Messages:
    358
    Location:
    san francisco, ca
    I also noticed this. I don't believe the front sensors are less sensitive than the rear ones but I have a few possible explanations for the phenomenon:

    - UI related issue: Tesla chose to make the front sensors fire less frequently because it confused drivers in their testing (don't know why)
    - Doppler Effect: Perhaps this kicks in at high speeds? Maybe causing the rear sensors to fire from the sound waves emitted by the front sensors?
     

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