Subject:
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Ultra Sonic Sensor Readings
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 2 May 2007 03:01:34 GMT
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Viewed:
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4737 times
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I've read the previous postings on the ultrasonic (aka "echo locator" among my
students).
I'm experimenting to see what the cone of energy looks like. Does anyone have
experimental data I can compare to?
I also need advice of detecting the scatter. Last week, I grabbed a potato chip
(Lays Stax) elliptical cylinder and gave it to a kid as a target. Poor kid got
really confused by the readings he got. He pulled me aside to ask why the US
wasn't seeing the container. We proceeded to turn the container and found a lot
of positions where the container "disappeared". So, I'd like to see if we can
setup US to find the cylinder all the time.
I imagine setting three US, use the center to ping and all of them to read.
What do you think?
Thanks.
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Message has 2 Replies:
 | | Re: Ultra Sonic Sensor Readings
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| (...) Getting a return off a cylindrical or worse yet, spherical object is very difficult. The sound reflects off in every direction, pretty uniformly, and so little of it comes back to the sensor. I'm not sure about your idea for using multiple (...) (18 years ago, 2-May-07, to lugnet.robotics)
| | | Re: Ultra Sonic Sensor Readings
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| (...) No, but I can think of some ways to generate such data. Part of the problem is that weather or not the sensor sees a return depends on two spread functions: the spread of sound energy from the transmitter, and the spread fo sound energy (...) (18 years ago, 2-May-07, to lugnet.robotics)
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