Results 31 to 40 of about 1,828,003 (344)
The Acoustic Field Distribution Inside the Ultrasonic Ring Array
Archives of Acoustics, 2018 This paper presents and analyses the results of a simulation of the acoustic field distribution in sectors of a 1024-element ring array, intended for the diagnosis of female breast tissue with the use of ultrasonic tomography.
Wiktor STASZEWSKI +2 more
doaj +1 more source
Applied Sciences, 2022 Non-destructive testing of the cracks on the in-service bolt’s shank with size M18 is a challenging technical problem. Due to the weak echo energy of cracks with large buried depths, the conventional phased array ultrasonic sector scan imaging has a low ...
Jingxing Huang +5 more
doaj +1 more source
Flexible ultrasonic array for breast-cancer diagnosis based on a self-shape-estimation algorithm.
Ultrasonics, 2020 Breast cancer is a very common malignant tumour that typically occurs in women aged 35-70 years (accounting for 85% of patients). Recently, it has been appearing in younger women as well.
Junjie Chang +5 more
semanticscholar +1 more source
An annular array with fiber composite microstructure for far field NDT imaging applications [PDF]
, 2009 This paper describes the design and fabrication of a reduced element count annular array for far field NDT imaging applications, built with a random fiber piezoelectric composite microstructure.
P. D. Wilcox +11 more
core +1 more source
Prototyping Airborne Ultrasonic Arrays
, 2022 Focused ultrasound is the base mechanism for mid-air tactile feedback generation, acoustic levitation, wireless power transfer, directional audio and other emerging applications. The basic required set-up is an ultrasonic emitter with the capability of focusing its acoustic power at a target point. Ideally, a multi-emitter phased array is used since it
openaire +2 more sources
Simulation of the influence of hydrophones used for the characterization of pressure field distribution in low frequency, high power ultrasonic reactor vessels [PDF]
, 2007 This paper describes the use of a finite element (FE) modeling approach to investigate the influence of different hydrophone designs in laboratory scale reactor vessels.
R.L. O'Leary +5 more
core +1 more source
High-precision robust broadband ultrasonic location and orientation estimation [PDF]
, 2009 This paper presents an indoor broadband ultrasonic system for estimation of a mobile device’s 3-D location and three-axis orientation using beacons. It presents the first implementation and characterization of a real frequency hopping spread spectrum ...
J. R. Gonzalez +3 more
core +2 more sources
Energies, 2019 Previous studies have indicated that a basic frost layer negatively affects the heat-transfer efficiency and is difficult to remove using a single ultrasonic transducer.
Haihui Tan +4 more
doaj +1 more source
, 2020 Frost dramatically deteriorates the operating performance of an air source heat pump unit and leads to additional energy consumption. Results of our previous study show that intermittent ultrasonic vibration can greatly improve the coefficient of ...
Haihui Tan +4 more
semanticscholar +1 more source
Phased array ultrasonic testing of micro-flaws in additive manufactured titanium block
Materials Research Express, 2020 While titanium components manufactured by additive manufacturing have been widely used in direct molding of complex components, their performance is strongly affected by existing internal flaws generated in the unique manufacturing process.
Xiaohui Wang +6 more
doaj +1 more source