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TECHNICAL BRIEFS

Accuracy Considerations in a 3-D Ultrasonic Positioning System Based on the Difference in Time of Flights

[+] Author and Article Information
Nishant Unnikrishnan, Probir Kumar Ray, Ajay Mahajan, Tsuchin Chu

Department of Mechanical Engineering and Energy Processes, Southern Illinois University at Carbondale, Carbondale, IL 62901

J. Dyn. Sys., Meas., Control 124(4), 688-693 (Dec 16, 2002) (6 pages) doi:10.1115/1.1514057 History: Received September 01, 2001; Revised March 01, 2002; Online December 16, 2002
Copyright © 2002 by ASME
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References

Figures

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Optical table setup and signals
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Signals from misaligned receivers
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Signals from non-equidistant receivers
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Error by thresholding measurement due to different Terror terms
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ΔT measurement and the associated error
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Normalized receiver signal for error estimation
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ΔTaccurate measurement using corresponding peak

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