Results 41 to 50 of about 2,408,128 (414)
Journal of Physics: Conference Series, 2020 This study was a quasi-experimental study which aims to compare the increase in understanding of the concept of viscosity in a group that were assisted by a video tracker, ultrasonic sensor devices and manual observation.
S. Susilawati +3 more
semanticscholar +1 more source
Monolithic ultrasound fingerprint sensor. [PDF]
, 2017 This paper presents a 591×438-DPI ultrasonic fingerprint sensor. The sensor is based on a piezoelectric micromachined ultrasonic transducer (PMUT) array that is bonded at wafer-level to complementary metal oxide semiconductor (CMOS) signal processing ...
Boser, Bernhard E +7 more
core +1 more source
Journal of Fundamental and Applied Sciences, 2015 Ultrasonic waves are used extensively in nondestructive testing both for characterization of material properties, in this paper, we describe a fiber optic sensor suitable for detection of ultrasonic waves. This sensor is based on an extrinsic fiber optic
S. Benhamida, F. Rehouma
doaj +1 more source
Journal of Electrical Systems and Information Technology, 2017 The light weight of ultrasonic sensors makes them useful for collecting environment information from mobile robots. Ultrasonic sensors are generally used in a circular formation in surface-moving robots, but this is not suitable for small flying robots ...
Kazuya Nakajima +2 more
doaj +1 more source
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer, 2021 Hama burung pipit merupakan musuh petani dan sulit dikendalikan populasinya. Selama ini pengusirannya menggunakan cara mekanis dengan peralatan tertentu dan tenaga manusia.
Ali Khumaidi, Nur Hikmah
doaj +1 more source
Frequency response of underwater ultrasonic transducers in the near field using polarimetric polarization maintaining fiber sensors [PDF]
, 2010 Near-field ultrasonic response (50-2000 kHz) of an underwater 1-3 piezocomposite transducer is experimentally investigated using a polarimetric polarization maintaining fiber sensor.
Bennecer, Abdeldjalil +5 more
core +2 more sources
Securing Ultrasonic Sensors Against Signal Injection Attacks Based on a Mathematical Model
IEEE Access, 2019 Ultrasonic sensors are used across a variety of industrial areas, as they measure distance simply via calculating the difference of time between transmission and reception of signals. However, recently, attackers have been targeting ultrasonic sensors to
Sunwoo Lee, Wonsuk Choi, Dong Hoon Lee
doaj +1 more source
Degradation of acephate using combined ultrasonic and ozonation method
Water Science and Engineering, 2015 The degradation of acephate in aqueous solutions was investigated with the ultrasonic and ozonation methods, as well as a combination of both. An experimental facility was designed and operation parameters such as the ultrasonic power, temperature, and ...
Bin Wang +8 more
doaj +1 more source
Design of ultrasonic liquid level sensor for sealed container
Gong-kuang zidonghua, 2013 In view of problem that existing ultrasonic liquid level detection methods need to open door of container in process of installing, so as to damage the container structure and affect sound wave because of volatile medium, a non-contact ultrasonic liquid ...
LU Gui-rong, NI Peng-hao, CHEN Shu-yue
doaj +1 more source
Weed discrimination using ultrasonic sensors [PDF]
Weed Research, 2011 Andújar D, Escolà A, Dorado J & Fernández‐Quintanilla C (2011). Weed discrimination using ultrasonic sensors. Weed Research51, 543–547.SummaryA new approach is described for automatic discrimination between grasses and broad‐leaved weeds, based on their heights. An ultrasonic sensor was mounted on the front of a tractor, pointing vertically down in
Andújar, Dionisio +3 more
openaire +4 more sources