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Tjockleksmätning med ultraljud: Icke konventionell metod med signalbehandling
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences.
2010 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Tjockleksmätning av rör med ultraljud görs typiskt genom att mäta tiden mellan två efterföljande ekon av en utsänd puls. Detta är ofta en svår process som är känslig för störningar och påverkan utifrån. Denna rapport beskriver hur detta i stället kan göras i frekvensdomänen för att minska effekterna av dessa problem.

För att göra detta härleds en signalmodell som beskriver de effekter som är nödvändiga för att utföra mätningarna. Utifrån signalmodellen togs metoder fram för att analysera och fastställa tjockleken på den uppmätta signalen.

En av metoderna fungerar så bra att den skulle kunna användas.

Abstract [en]

Ultrasonic thickness gauging of steel tubes is typically performed by observing the time difference between two following echoes. This process is often connected to various problems regarding interference. This thesis describes how to avoid these problems by using signal processing and analyzing the signals in the frequency domain.

To achieve these results a signal model that describes the necessary effects is derived. From this model different measurement methods to analyze and determine the thickness are developed.

One of the methods proved to be useful.

Place, publisher, year, edition, pages
2010. , p. 27
Keyword [sv]
Elektronik, Ultraljud, Mätteknik, Frekvensanalys
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:hig:diva-7319OAI: oai:DiVA.org:hig-7319DiVA, id: diva2:342730
Uppsok
Technology
Supervisors
Examiners
Available from: 2010-08-11 Created: 2010-08-10 Last updated: 2010-08-11Bibliographically approved

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Control Engineering

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
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  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
  • html
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  • asciidoc
  • rtf