High Frequency Transducer
High Frequency Transducer - Related Videos
08:12
Pressure Transducer: Calibration Using a Pitot-static Tube
0 Views •
2023
Source: Shreyas Narsipur, Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC Fluid pressure is an important flow characteristic that is required to determine the aerodynamics of a system. One of the oldest and still existing pressure measurement systems is the manometer due to its accuracy and simplicity of operation. The manometer is generally a U-shaped glass tube that is partially filled with liquid, as shown in Figure 1. The U-tube manometer requires no...
14:20
High-frequency Ultrasound Imaging of the Abdominal Aorta
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2023
Source: Amelia R. Adelsperger, Evan H. Phillips, and Craig J. Goergen, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana High-frequency ultrasound systems are used to acquire high resolution images. Here, the use of a state-of-the-art system will be demonstrated to image the morphology and hemodynamics of small pulsatile arteries and veins found in mice and rats. Ultrasound is a relatively inexpensive, portable, and versatile method for the noninvasive...
07:02
Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring
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2025
Here, we experimentally compare singly curved and straight piezoelectric transducers embedded in reinforced concrete structures for energy harvesting and structural health monitoring by evaluating their open-circuit voltage, power generation, power storage, and damage detection capability. Curved transducers have surpassed the straight ones, offering better performance for real-world applications.
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
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Cited by 4 •
2015
We describe the generation of far-infrared radiation using an optically pumped molecular laser along with the measurement of their frequencies with heterodyne techniques. The experimental system and techniques are demonstrated using difluoromethane (CH2F2) as the laser medium whose results include three new laser emissions and eight measured laser frequencies.
10:02
High-frequency Ultrasound Imaging of Mouse Cervical Lymph Nodes
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Cited by 6 •
2015
This protocol describes the application of high-frequency ultrasound (HFUS) for imaging mouse cervical lymph nodes. This technique optimizes visualization and quantification of cervical lymph node morphology, volume and blood flow. Image-guided biopsy of cervical lymph nodes and processing of lymph tissue for histological evaluation is also demonstrated.
FAQs
When the acoustic pressure is sufficient, bubbles form, grow, and collapse within the liquid. Their collapse produces localized mixing, heating, and other high-energy conditions rather than distributing energy uniformly throughout the chemical system. These localized effects can accelerate reactions and improve mass transfer, which helps explain the usefulness of ultrasound in sonochemical processes.
The piezoelectric ceramic or crystal couples the electrical input to mechanical motion. An alternating electric field repeatedly changes the element’s dimensions, producing rapid vibrations that are transmitted into the liquid as pressure waves. This conversion provides controlled delivery of ultrasound, allowing the chemical system to receive mechanical energy from an electrical source.
A sufficient intensity is necessary for cavitation, so the energy delivered to the liquid strongly influences the outcome. The chemical system must also provide a liquid medium through which pressure waves can travel. Together, acoustic intensity and energy coupling affect whether the process mainly produces vibration or generates bubble activity associated with mixing, heating, and high-energy conditions.
Bulk mixing distributes motion through the chemical system, whereas cavitation adds localized bubble formation and collapse. Those events create concentrated mixing, heating, and high-energy conditions that can improve mass transfer and accelerate reactions. Consequently, a high frequency transducer can contribute more than simple agitation when a process benefits from localized mechanical effects in a liquid.
A general workflow places the chemical system in a liquid medium, couples the transducer to that system, and applies an alternating electrical input to generate pressure waves. The delivered ultrasound is controlled at an intensity sufficient for the intended effect, such as cavitation, mixing, or heating. The resulting treatment can then support the selected chemical or analytical operation.
It is relevant when a reaction may benefit from improved mass transfer, localized mixing, or high-energy conditions produced by cavitation. In synthesis and sonochemistry, these effects can accelerate reactions within a liquid chemical system. The technique therefore serves as a way to deliver controlled mechanical energy while supporting reaction processing rather than relying solely on conventional chemical conditions.
The same ultrasound-based energy delivery supports emulsification, extraction, particle dispersion, and sample preparation. These uses rely on mechanical effects in a liquid, including localized mixing and improved transport between components. The approach also appears in materials processing and analytical workflows, where controlled treatment can help prepare or process chemical samples and dispersed materials.