Results 21 to 30 of about 123,977 (300)

3D environment mapping and self-position estimation by a small flying robot mounted with a movable ultrasonic range sensor

open access: yesJournal 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

Frequency response of underwater ultrasonic transducers in the near field using polarimetric polarization maintaining fiber sensors [PDF]

open access: yes, 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

MODELLING OF EXTRINSIC FIBER OPTIC SAGNAC ULTRASOUND INTERFEROMETER USED FOR DISPLACEMENT MEASUREMENTS

open access: yesJournal 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

Partial discharge pattern recognition in GIS based on EFPI sensor

open access: yes电力工程技术, 2022
The extrinsic Fabry-Perot interferometer (EFPI) optical fiber ultrasonic sensor can be used for the detection and pattern recognition of the partial discharge ultrasonic signal inside the gas-insulated switchgear (GIS).
HAN Shijie   +5 more
doaj   +1 more source

Securing Ultrasonic Sensors Against Signal Injection Attacks Based on a Mathematical Model

open access: yesIEEE 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

RANCANG BANGUN PROTOTIPE PENGUSIR HAMA BURUNG MENGGUNAKAN SENSOR GERAK RCWL MICROWAVE BERBASIS INTERNET OF THINGS

open access: yesSimetris: 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

Degradation of acephate using combined ultrasonic and ozonation method

open access: yesWater 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

open access: yesGong-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

Design and implementation of a real-time autonomous navigation system applied to lego robots [PDF]

open access: yes, 2018
Teaching theoretical concepts of a real-time autonomous robot system may be a challenging task without real hardware support. The paper discusses the application of the Lego Robot for teaching multi interdisciplinary subjects to Mechatronics students.
Copot, Cosmin   +2 more
core   +1 more source

Towards Human Motion Tracking Enhanced by Semi-Continuous Ultrasonic Time-of-Flight Measurements

open access: yesSensors, 2021
Human motion analysis is a valuable tool for assessing disease progression in persons with conditions such as multiple sclerosis or Parkinson’s disease.
Silje Ekroll Jahren   +5 more
doaj   +1 more source

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