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Thread: How do I figure out what kind of sensor I am dealing with?

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    How do I figure out what kind of sensor I am dealing with?

    Hi. A while back I bought a "high low-end" park-distance kitk. It came with 8 sensors, two controll units and even a small neat LCD screen. Now I got my carputer installed with the phidgets 8/8/8 board. What I want is to connect the park-distance sensors to the 8/8/8, but I have no idea of how the sensors work. I've been looking through the manual for the sensor-kit, but nothing is mentioned. All I can tell is that the plug which goes from the sensor has two contact points, I havent cut the cablee to see how many wires it consists off, but I guess it is safe to assume that it is two wires. Can someone help me with this?

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    Low Bitrate pulsarsimon's Avatar
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    a piezoelectric ultrasonic transducer has two wires, one is usually the outer of a coaxial cable, the other is the inner.

    the only thing to remember, or watch for, is to get these the right way around.
    they don't have a magical distance sensor built in - that's for the brain box of the parking kit.

    The phidgets board will not interface directly to the sensors, and maybe not even to the brain box of the parking kit.
    MacMini in an Alfa? - Why not!

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    But this sensor gives some kind of output? Since it just have two wires, could it then just be a potensiometer which vary with the distance?

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    Low Bitrate pulsarsimon's Avatar
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    no, it's like a speaker and a microphone built in together.

    The parking kit brain box uses the sensor to emit an ultrasonic pulse. It then waits until an echo comes back from an object (such as a nearby car). The amount of time elapsed between sending a pulse and receiving the echo is then calculated to a distance.
    All this is done inside the brain box of the parking kit.

    perhaps try here:http://www.google.com.au/url?url=htt...y&ved=0CBAQygQ
    MacMini in an Alfa? - Why not!

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    Oh, yeah then I see that this would be impossible :S But it shoud still be possible to connect the brain box to either the phidgets board of the computer, right?

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    Low Bitrate pulsarsimon's Avatar
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    there's a box for that a buy made - with USB interface
    can't remember what it's called though
    MacMini in an Alfa? - Why not!

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