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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 01-21-2009, 12:30 PM   #1
schneidz
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object detector (preferably infrared) that can detect an object 3 feet away


object detector (preferably infrared) that can detect an object 3 feet away

hi i am looking for something like this for a project that can detect large objects.

does anyone know how i can build/ order someting that would do this ?

thanks,
 
Old 01-21-2009, 12:53 PM   #2
theNbomr
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Ultrasonic range detectors, some made by Polaroid, have been somewhat popular with robotics hobbyists for object detection projects. Googling 'polaroid ultrasonic range finder' got me quite a few hits that seem relevant.
There are a few ambiguities in your question. What exactly are you attempting to do?
--- rod.
 
Old 01-21-2009, 01:54 PM   #3
schneidz
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warning detector for a car.
 
Old 01-21-2009, 02:32 PM   #4
theNbomr
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What does that mean? You want to see if there is a car within 3 feet of your 'something'? You want to know if there is a car that is at least 3 feet from your 'something'? Is the 3 foot figure a threshold, a minimum, a maximum, other? Why do you prefer infrared? Infrared is good for motion detection, but not so good for ranging. Vehicles that are equipped with rear-mounted hazard detection sensors use ultrasonics.
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Old 01-21-2009, 03:16 PM   #5
schneidz
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thanks for the info. just want to see if it is feasable for me to retrofit a front end collision warning detector into an old car...

i worked with ir in a project in college (basic-stamp 2 -> ssc2) i forget the manufacturer of the ir emitter.

do you have any specific products in mind (i'll start with polaroid)?

Last edited by schneidz; 01-21-2009 at 03:19 PM.
 
Old 01-21-2009, 05:21 PM   #6
theNbomr
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The Polaroid device is the only one I know off the top of my head. Now that I know your application, I am certain that you don't want to use IR, as dirt would be a significant source of interference.
--- rod.
 
  


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