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Posted: 4/19/2010 1:37:40 PM EDT
I'm working on a project idea for class, and I want something similar to the low cost ultrasonic rangefinders available for robot kits. However, most of the ones I have seen only return a pulse of fixed magnitude when they receive any return sound above a certain threshold. I would like to be able to see the strength of the return sound pulse to the receiver. It can't be expensive (must be less than $50). Anyone have any ideas? The objective is to scan the ground and reconstruct a rough image based on the varying reflectivity of the objects on the surface, I don't need a high level of resolution.

Thanks
Link Posted: 4/19/2010 3:33:11 PM EDT
The following paper on triangulation using ultrasonic microphones may help you with your goal:

http://web.wm.edu/physics/Senior%20Theses%202004/Loncich-Kristen.pdf





Link Posted: 4/19/2010 3:36:28 PM EDT
A/D Converter?
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