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The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe
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Passive Downhole Pressure Sensor Based on Surface Acoustic Wave Technology.

Sully M M Quintero1, Sávio W O Figueiredo2, Victor L Takahashi3

  • 1Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil. sully@puc-rio.br.

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Summary
This summary is machine-generated.

A new passive surface acoustic wave (SAW) pressure sensor offers real-time monitoring for downhole applications. Its robust design and high sensitivity make it ideal for harsh industrial environments.

Keywords:
SAW devicedownhole applicationpressure sensorwireless sensor

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Area of Science:

  • Materials Science
  • Sensor Technology
  • Acoustic Physics

Background:

  • Downhole applications require reliable real-time pressure monitoring.
  • Traditional sensors face challenges in harsh downhole environments.
  • Surface Acoustic Wave (SAW) devices offer potential for robust sensing.

Purpose of the Study:

  • To develop and characterize a passive SAW pressure sensor for downhole applications.
  • To evaluate the sensor's sensitivity, linearity, and suitability for harsh environments.
  • To validate experimental findings with analytical and numerical methods.

Main Methods:

  • Development of a passive SAW pressure sensor utilizing a SAW resonator and a metal diaphragm.
  • Measurement of sensor frequency response to applied pressure.
  • Validation of experimental data using hybrid analytical-numerical analysis.
  • Assessment of sensor design and packaging for harsh environments.

Main Results:

  • The SAW pressure sensor demonstrated a sensitivity of 8.3 kHz/bar.
  • High linearity was achieved, with a measured value of 0.999.
  • Experimental results were successfully validated by hybrid analytical-numerical analysis.
  • The sensor's robust design is suitable for harsh industrial conditions.

Conclusions:

  • The developed passive SAW pressure sensor is a promising technology for real-time downhole pressure monitoring.
  • The sensor exhibits excellent sensitivity and linearity.
  • Its robust design and packaging make it suitable for demanding industrial applications.