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Research on Wireless Passive Ultrasonic Thickness Measurement Technology Based on Pulse Compression Method.
Sensors (Basel)
December 2024
SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao 266000, China.
Fixed-point thickness measurement is commonly used in corrosion detection within petrochemical enterprises, but it suffers from low detection efficiency for localized thinning, limitations regarding measurement locations, and high equipment costs due to insulation and cooling layers. To address these challenges, this paper introduces a wireless passive ultrasonic thickness measurement technique based on a pulse compression algorithm. The research methodology encompassed the development of mathematical and circuit models for single coil and wireless energy transmission, the proposal of a three-terminal wireless energy mutual coupling system, and the establishment of a finite element model simulating the ultrasonic body wave thickness measurement and wireless energy transmission system.
View Article and Find Full Text PDFAssessment of Corrosion and Cavitation Resistance of Laser Remelted GX40CrNiSi25-20 Cast Stainless Steel.
Materials (Basel)
December 2024
Department of Materials and Fabrication Engineering, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timișoara, Romania.
This paper explores the enhancement of cavitation and corrosion resistance in cast stainless steel through laser beam surface remelting. The influence of laser treatment on material properties was assessed by analyzing the microstructure using optical microscopy, electron microscopy, and X-ray diffraction. Cavitation erosion was evaluated in tap water using an ultrasonic vibration setup, following ASTM G32-2016 standards.
View Article and Find Full Text PDFComparison of Phacoemulsification and Aspiration Parameters in Cataract Surgery: Metal Tip vs. Hybrid Tip.
Bioengineering (Basel)
November 2024
Center for Society-Academia Collaboration, Research Promotion Headquarters, Fujita Health University, Toyoake, Aichi 470-1192, Japan.
Various tips are available for phacoemulsification in cataract surgery. Evidence-based data can inform ophthalmologists, especially inexperienced ones, on tip selection. We retrospectively evaluated the energy efficiency and other parameters of two ultrasonic phacoemulsification and aspiration tips across different nuclear hardness grades in 342 cataract patients (342 eyes) with nuclear hardness grades II to IV.
View Article and Find Full Text PDFNon-Invasive Monitoring of Cerebral Edema Using Ultrasonic Echo Signal Features and Machine Learning.
Brain Sci
November 2024
State Key Laboratory of Ultrasound in Medicine and Engineering, Chongqing Medical University, Chongqing 400016, China.
Objectives: Cerebral edema, a prevalent consequence of brain injury, is associated with significant mortality and disability. Timely diagnosis and monitoring are crucial for patient prognosis. There is a pressing clinical demand for a real-time, non-invasive cerebral edema monitoring method.
View Article and Find Full Text PDFRole of P × receptor during focused ultrasound induced blood brain barrier modulation.
Sci Rep
January 2025
Department of Neurosurgery and Brain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
Although low-intensity focused ultrasound (LiFUS) with microbubbles is used to temporally open the blood-brain barrier (BBB), the underlying mechanism is not fully understood. This study aimed to analyze BBB-related alterations in the brain microenvironment after LiFUS, with a focus on the involvement of the purinergic P × receptor. Sprague-Dawley rats were sonicated with LiFUS at 0.
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