electronic measurement of distance of a rotating object within 3 meter
electronic measurement of distance of a rotating object within 3 meter
(OP)
I am working on a project that requires for me to measure electronically the distance(cm) of a rotating object. The full range needed is 3 meters maximum.
I was looking into infrared and ultra sonic but this will be effected by objects getting in the way.
Does anyone have a good solution for me?
I was looking into infrared and ultra sonic but this will be effected by objects getting in the way.
Does anyone have a good solution for me?





RE: electronic measurement of distance of a rotating object within 3 meter
If you could calibrate the item, you could do many rf or acoustic tricks, i.e. hand position the item, measure signals, reposition the item, measure again.
RE: electronic measurement of distance of a rotating object within 3 meter
In this case, why not a vision system?
RE: electronic measurement of distance of a rotating object within 3 meter
RE: electronic measurement of distance of a rotating object within 3 meter
Optical sounds good.
One of our programs used a high resolution Sony camera to view points in a moving item and as the points moved, the camera noted which pixel they moved to and did a recalibration based on location. your management can grasp that working easily, hence it's a good concept just based on marketing appeal.
costwise, it's mostly software to do the math on the points.
there's a time delay of course using a camera and doing the processing.
There are software programs out there that can show you the changes in pixels, i.e. subtract one scene from the next. It's used to detect intruders when they enter an area. So you may be able to use that and operate on their subtraction results.
are you adjusting something based on your measurements? Or just gathering data for later analysis?
kch
RE: electronic measurement of distance of a rotating object within 3 meter
The 6 objects are rotating. so light ans ultrasonic can't work.
is it possible to scan 6 different rf transmitters to measure their distance away from each other?
RE: electronic measurement of distance of a rotating object within 3 meter
RE: electronic measurement of distance of a rotating object within 3 meter
Don't plan on RF working, too much multipath and high cost.
If this is for an internal engine motion, that's way different than a conveyor belt. Hence, you give so little detail, it's like asking for someone to give you a car for an upcoming race and not saying if it's soap box derby or the Indy 500.
Acoustic transducers measure accuracy at 0.1% accuracy http:
if that's good enough. But that's a transducer pointing at a reflecting object or wall and telling you the distance in the 0.5 to 20 feet range. If you could, set two on each moving item and make reflectors a certain distance away. If the 0.1% accuracy is ok, you can tell where each sensor is, then with calibration and math find their relative postions. You'd probably need wireless or slip rings to send the data out to a computer to get your results.
As mentioned earlier, everyone asks this question and no one gets a good easy just go buy this inexpensive chip answer. Acoustics are pretty inexpensive though.
kch
RE: electronic measurement of distance of a rotating object within 3 meter
Rich
www.MaguffinMicrowave.com
Microwave and wireless design consulting