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Experimental determination of the ultrasonic echo from a pointlike reflector using a tomographic approach
Luleå tekniska universitet.
Luleå tekniska universitet.
1992 (English)In: Proceedings: IEEE 1992 Ultrasonics Symposium ; October 20 - 23, 1992, Holiday Inn Broadway, Tucson, Arizona / [ed] Bruce R. McAvoy, Piscataway, NJ: IEEE Communications Society, 1992, Vol. 2, 639-642 p.Conference paper (Refereed)
Abstract [en]

One important parameter for an ultrasonic transducer is the echo it yields from a pointlike reflector. It can be measured directly but there are however certain problems connected with this. This reflector must have such a size that it can be considered a point, which results in a very weak echo and consequently a low SNR. We propose an alternative method to calculate the echo from a pointlike reflector by measuring the echoes from sliding halfplanes. Using a tomographic way of reasoning, we can calculate the single point echo from these measurements. Our approach was to find basis functions that are suitable for the inversion of the measurements. These basis functions depend on which norm and weight function you choose. Numerical solutions are given for chosen weight functions and the inversion is shown for the measurements.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 1992. Vol. 2, 639-642 p.
Research subject
Signal Processing
URN: urn:nbn:se:ltu:diva-34574DOI: 10.1109/ULTSYM.1992.275922Local ID: 8ceb9b50-e087-11dc-9e29-000ea68e967bISBN: 0-7803-0562-0OAI: diva2:1007825
IEEE Ultrasonics Symposium : 20/10/1992 - 23/10/1992
Godkänd; 1992; 20080221 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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