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Related Concept Videos

Ultrasonography01:17

Ultrasonography

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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Ultrasound Velocity Measurement in a Liquid Metal Electrode
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Ultrasonic Transducers for In-Service Inspection and Continuous Monitoring in High-Temperature Environments.

Sevan Bouchy1,2, Ricardo J Zednik1,2, Pierre Belanger1,2

  • 1PULETS, École de Technologie Supérieure (ÉTS), Montréal, QC H3C 1K3, Canada.

Sensors (Basel, Switzerland)
|April 13, 2023
PubMed
Summary
This summary is machine-generated.

This study developed a heat-resistant ultrasonic transducer for real-time monitoring of high-temperature industrial structures. The new transducer enables continuous inspection, preventing failures and reducing costs associated with traditional methods.

Keywords:
bulk acoustic wave sensorscontinuous inspectionhigh temperaturein-service inspectionnondestructive evaluationpiezoelectrictransducerultrasonic sensorsultrasound

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Non-Destructive Testing

Background:

  • High-temperature industrial structures require continuous monitoring to prevent catastrophic failures.
  • Current non-destructive evaluation methods, like ultrasound during shutdowns, are costly and may miss developing corrosion.
  • There is a critical need for ultrasonic transducers capable of withstanding prolonged high-temperature exposure for real-time structural health monitoring.

Purpose of the Study:

  • To design and develop a novel heat-resistant ultrasonic transducer.
  • To enable continuous, real-time monitoring of remnant thicknesses in high-temperature industrial environments.
  • To address the limitations of calendar-based inspection methods.

Main Methods:

  • Detailed design considerations for a piezoelectric-based ultrasonic transducer, focusing on acoustic and thermal properties of materials (piezoelectric element, electrodes, backing, wires, casing).
  • Optimization of transducer design for a 3 MHz operating frequency.
  • Destructive testing of four manufactured transducers under various high-temperature conditions: prolonged high-temperature steps (up to 750 °C), thermal cycling (up to 500 °C), and continuous operation (>550 °C for 60 days).

Main Results:

  • Successful design and fabrication of four 3 MHz heat-resistant ultrasonic transducers.
  • Transducers were subjected to rigorous testing, including extended exposure to temperatures up to 750 °C and continuous operation above 550 °C.
  • Performance and degradation under thermal stress were evaluated, providing insights into the long-term effects of temperature on transducer properties.

Conclusions:

  • The developed heat-resistant ultrasonic transducer shows promise for real-time monitoring in high-temperature industrial applications.
  • The study provides valuable data on the performance and limitations of such transducers under extreme thermal conditions.
  • This technology can enhance safety and reduce operational costs in industries like energy and petrochemicals.