Time-Domain Reflectometry (TDR) in mapping soil temperature and humidity [PDF]
E3S Web of Conferences, 2019 The article presents the possibilities of using time-domain reflectometry (TDR) to determine the temperature and moisture content of mineral soil. The TDR method is based on measuring the time of an electromagnetic impulse’s flow between the source and ...
Sikora Jakub +4 more
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In-situ evaluation of collapsible loess through time-domain reflectometry
Yantu gongcheng xuebao, 2022 It is urgent to propose a new technique for the in-situ evaluation of collapsible loess, as the existing methods are time- and cost-consuming, and may lead to inevitable sampling disturbance.
MU Qing-yi 1, 2, 4, ZHENG Jian-guo 3, 4, YU Yong-tang 3, 4, MENG Long-long 1, LIU Fen-liang 1
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Time domain reflectometry applied to MMIC passive component modeling [PDF]
, 1989 The time domain facilities of a network analyzer, combined with the tools of network synthesis, were recently used for experimental modeling of discontinuities in an S-parameter measurement set, so as to allow the instrument calibration directly to the ...
C. Beccari +5 more
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A multiplexed CW Brillouin system for precise interrogation of a sensor array made from short discrete sections of optical fibre [PDF]
, 2008 A novel configuration for precise temperature sensing in an array of optical fibre sections is reported. The sections are chosen to have different Brillouin shifts, to enable separation of scattered light signals in the frequency domain, rather than the ...
Dakin, J. P. +7 more
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Low-Error Soil Moisture Sensor Employing Spatial Frequency Domain Transmissometry
Sensors, 2022 A new type of soil moisture sensor using spatial frequency domain transmissometry (SFDT) was evaluated. This sensor transmits and receives ultrawideband (1 to 6 GHz) radio waves between two separated antennas and measures the propagation delay time in ...
Tadaomi Saito +8 more
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Optical Frequency Domain Reflectometry Based on Multilayer Perceptron
Sensors, 2023 We proposed an optical frequency domain reflectometry based on a multilayer perceptron. A classification multilayer perceptron was applied to train and grasp the fingerprint features of Rayleigh scattering spectrum in the optical fiber.
Guolu Yin +6 more
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Hands-on-Detection based on Time Domain Reflectometry
, 2022 This paper presents a method for spatial hands-on detection, which not only allows the recognition of the hands-on the steering wheel, but also at which location and strength the driver is gripping the wheel allowing a classification if the grip complies
Thomas Brugger (13933482) +3 more
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A Reevaluation of Time Domain Reflectometry Propagation Time Determination in Soils
Vadose Zone Journal, 2014 Time domain reflectometry (TDR) is an established method for the determination of apparent dielectric permittivity and water content in soils. Using current waveform interpretation procedures, signal attenuation and variation in dielectric media ...
R.C. Schwartz +3 more
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High temporal and spatial resolution distributed fiber Bragg grating sensors using time-stretch frequency-domain reflectometry [PDF]
, 2016 A novel interrogation technique for fully distributed linearly chirped fiber Bragg grating (LCFBG) strain sensors with simultaneous high temporal and spatial resolution based on optical time-stretch frequency-domain reflectometry (OTS-FDR) is proposed ...
Wang, Chao +4 more
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Phase-sensitive optical time-domain reflectometry: concept and applications
, 2022 We provide an overview of the basic concepts, state of the art performances and applications of phase-sensitive optical time-domain reflectometry.10.13039/501100004837-Spanish Ministry of Science and Innovation (Grant Number: PLEC2021-007875,MCIN/AEI/10 ...
Fernández-Ruiz, María R. +3 more
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