Piezofilm sensors for the detection of propagating acoustic pressure in pipes

Authors

  • B.V. Chapnik Dept. of Mech. Eng., Toronto Univ., Ont., Canada
  • I.G. Currie Dept. of Mech. Eng., Toronto Univ., Ont., Canada

Keywords:

acoustic intensity measurement, piezoelectric transducers, structural acoustics, acoustic pressure, piping system, structural sensors, interior acoustic field, piezofilm ring sensors

Abstract

There are a number of situations in industry in which one may wish to measure the acoustic pressure in a piping system, but for which standard microphone methods are expensive or difficult to implement. These include cases of high fluid temperature, pressure or velocity, and material handling systems in which there are particulates or debris in the flow. As an alternative, some researchers have investigated the possibility of using structural sensors attached to the piping, which is coupled to the interior acoustic field, to estimate the pressure. This method has shown reasonable promise for axisymmetric waves well below the ring frequency of the piping. This study describes the theory of the method, and the results of some experimentation performed at the University of Toronto using piezofilm ring sensors attached to a rubber tube, with air as the contained fluid. Some approximations which can be made for low frequencies are described, and some practical limitations of the method presented

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Published

1994-09-01

How to Cite

1.
Chapnik B, Currie I. Piezofilm sensors for the detection of propagating acoustic pressure in pipes. Canadian Acoustics [Internet]. 1994 Sep. 1 [cited 2021 Dec. 7];22(3):101-2. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/869

Issue

Section

Proceedings of the Acoustics Week in Canada