Development of an air-coupled ultrasonic sensor for high pressure, and temperature applications

J. S. Sandman, B. R. Tittmann

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The focus of this investigation is to develop an Ultrasonic Position Indication System (UPIS) that is capable of determining one-dimensional target location in a steel-contained pressurized gaseous medium. The combination of the very high acoustical impedance of steel (45.4 MRayl) and the very low impedance of air (0.0004 MRayl) causes extremely high-energy losses upon transmission. In addition to the energy loss, propagation through a steel plate produces many internal reflections in the plate. The strategy of this investigation is to develop a self-contained ultrasonic transducer that is capable of replacing a small portion of a high temperature-pressure boundary. In building such a transducer, sufficient acoustic matching layers for the steel-gas interface, a mechanically and acoustically competent housing, a sufficient piezoelectric element, and backing materials are all developed and tested. The results include a successful housing design, high-temperature acoustic matching layers, and subsequent successful waveforms. Target location through 9.6 inches (24.5 cm) of ambient air was successful, with a steel pressure boundary 0.4566 inches (1.1598 cm) thick, and using one matching layer.

Original languageEnglish (US)
Pages (from-to)214-225
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3993
StatePublished - 2000

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Ultrasonic sensors
Steel
ultrasonics
steels
Sensor
sensors
air
Air
Transducer
Impedance
Energy dissipation
Acoustics
transducers
Temperature
energy dissipation
impedance
Sufficient
Acoustic transducers
Ultrasonic transducers
Target

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

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Development of an air-coupled ultrasonic sensor for high pressure, and temperature applications. / Sandman, J. S.; Tittmann, B. R.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 3993, 2000, p. 214-225.

Research output: Contribution to journalArticle

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