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Related Concept Videos

Sound as Pressure Waves01:17

Sound as Pressure Waves

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Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
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This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
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Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
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To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
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A Non-Intrusive Pressure Sensor by Detecting Multiple Longitudinal Waves.

Hongliang Zhou1, Weibin Lin2, Xiaocheng Ge3

  • 1State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. zjuzhl@zju.edu.cn.

Sensors (Basel, Switzerland)
|August 17, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces a novel non-intrusive pressure sensor using ultrasonic waves. The new model improves accuracy by analyzing critically refracted longitudinal (LCR) waves and reflected waves, outperforming single-wave methods.

Keywords:
longitudinal wavesnon-intrusivepressure sensorultrasonic

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Ultrasonics

Background:

  • Pressure vessels are critical safety components in industrial applications, especially those handling hazardous materials.
  • Accurate pressure measurement is essential for operational management and safety.
  • Existing non-intrusive pressure sensors have limitations in accuracy.

Purpose of the Study:

  • To develop and evaluate a new non-intrusive pressure sensor design.
  • To improve the accuracy of pressure measurement in industrial vessels.
  • To utilize ultrasonic wave properties for enhanced sensor performance.

Main Methods:

  • A novel sensor model based on ultrasonic wave propagation was developed.
  • The model incorporates the travel-time changes of critically refracted longitudinal (LCR) waves and reflected longitudinal waves.
  • Experimental validation was performed by comparing the proposed model against existing models.

Main Results:

  • The proposed non-intrusive sensor model demonstrates improved accuracy in pressure measurement.
  • Analysis of both LCR waves and reflected longitudinal waves enhances predictive capabilities.
  • The new model shows superior performance compared to models relying on a single wave type.

Conclusions:

  • The developed ultrasonic non-intrusive pressure sensor offers a more accurate measurement solution.
  • This approach provides a reliable method for monitoring critical pressure in industrial vessels.
  • The findings suggest a significant advancement in non-intrusive sensing technology for safety-critical systems.