Technical Reports

Improved Source Location Using Sensor Arrays

  • 01
  • Jun
  • 1998
AUTHOR: Mark P. Connolly and James Lyman
OFFICE: RPD
REPORT NUMBER: DOT/FRA/ORD-98/05
SUBJECT: Hazardous Materials
KEYWORDS: Acoustic emission location sensor-array
ABSTRACT: The purpose of this research was to develop a sensor array capable of identifying the location of acoustic sources. The sensor array was constructed from a polymer known as PVDF. The array was created using an etching technique similar to that used for printed circuit boards. An amplifier was designed and built for this array. A microprocessor controlled digital logic board was built that was capable of analyzing the output from up to 16 pre-amplifiers. The logic board was capable of analyzing the output from a 4 by 4 sensor array as an acoustic wave traversed the sensor elements. A number of trials with the sensor-array and associated electronics showed that it was capable of identifying the direction of a number of sources.

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