Results 51 to 60 of about 123,971 (352)
Laser Ultrasound Inspection Based on Wavelet Transform and Data Clustering for Defect Estimation in Metallic Samples [PDF]
, 2019 Laser-generated ultrasound is a modern non-destructive testing technique. It has been investigated over recent years as an alternative to classical ultrasonic methods, mainly in industrial maintenance and quality control procedures.
Cojocaru, Crina +4 more
core +2 more sources
Omni-Directional Scanning Localization Method of a Mobile Robot Based on Ultrasonic Sensors
Sensors, 2016 Improved ranging accuracy is obtained by the development of a novel ultrasonic sensor ranging algorithm, unlike the conventional ranging algorithm, which considers the divergence angle and the incidence angle of the ultrasonic sensor synchronously.
Wei-Yi Mu +5 more
doaj +1 more source
AIP Advances, 2021 In order to effectively enhance the sensitivity and response range of optical fiber Fabry–Pérot (FP) ultrasonic sensors, this article proposes an implementation method of an optical fiber FP ultrasonic sensor with a controllable cavity length and ...
Long Li +6 more
doaj +1 more source
Single-mode fiber ultrasonic sensor [PDF]
IEEE Journal of Quantum Electronics, 1982 An acoustooptic ultrasonic sensor using a single-mode fiber is discussed. The sensor is based on acoustically induced modal birefringence which alters the polarization state of the optical beam.
DePaula, R. +3 more
openaire +3 more sources
Optical fiber sensor for ultrasonic detection at high temperature
Nihon Kikai Gakkai ronbunshu, 2017 Because of the stable material property of optical fiber up to 1000℃, fiber-optic Bragg grating (FBG) sensor is considered as one of possible ultrasonic sensors used at ultrahigh temperature.
Fengming YU, Yoji OKABE
doaj +1 more source
A Review of Transparent Sensors for Photoacoustic Imaging Applications
Photonics, 2021 Photoacoustic imaging is a new type of noninvasive, nonradiation imaging modality that combines the deep penetration of ultrasonic imaging and high specificity of optical imaging.
Danyang Ren +3 more
doaj +1 more source
A method of precise measurement of air speed in mine ventilatio
Gong-kuang zidonghua, 2014 In view of problem that it is hard to precisely measure time of pulse arriving at receiving sensor due to presence of start-up process when ultrasonic sensor receives ultrasonic pulse signal, the paper proposed a method of precise measurement of air ...
SA Xianchun, CAO Juan, WANG Ning
doaj +1 more source
Sensors, 2023 Reconstruction of the acoustic relaxation absorption curve is a powerful approach to ultrasonic gas sensing, but it requires knowledge of a series of ultrasonic absorptions at various frequencies around the effective relaxation frequency.
Kun Shen +4 more
doaj +1 more source
Acoustical Ranging Techniques in Embedded Wireless Sensor Networked Devices [PDF]
, 2013 Location sensing provides endless opportunities for a wide range of applications in GPS-obstructed environments; where, typically, there is a need for higher degree of accuracy.
Jha, Sanjay +4 more
core +2 more sources
The high frequency flexural ultrasonic transducer for transmitting and receiving ultrasound in air [PDF]
, 2020 Flexural ultrasonic transducers are robust and low cost sensors that are typically used in industry for distance ranging, proximity sensing and flow measurement.
Dixon, Steve M. +2 more
core +3 more sources