Connect with us

ultrasonic sensors

Discussion in 'Sensors and Actuators' started by stranger, Jun 18, 2010.

Scroll to continue with content
  1. stranger


    Jun 18, 2010
    i am planning to use car revers parking sensors for sensing in robotics and i found out that there are two kinds of sensors

    one kind have sensors with 3 pins.......which i guesses as vcc ground and signal.....

    the other have two pins so i thought they act as variable resistors depending on distance.....

    am i right?
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    probably not

    If you have part numbers for these parts then you could google for them and see what you get.
  3. ChosunOne


    Jun 20, 2010
    Don't know if this helps you, stranger, but the alarm industry used to use lots of ultrasonic sensors decades ago, before they were supplanted by passive infrared sensors. I don't know how the car sensors work, but the ones in alarm systems measured relative velocity between source and target, and operated on doppler effect by comparing the frequency transmitted to the return freq of the echo.

    Dunno if that helps, but I thought I'd toss it out just in case.
  4. stranger


    Jun 18, 2010
    yeah.........thanks a lot.......
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day