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#1Y. F. Xu (UC: University of Cincinnati)H-Index: 6
Abstract A photogrammetry-based experimental modal analysis (EMA) method is developed, where a single-point laser shines a laser beam to a surface of a test object and an exterior feature is added to the test object in the form of a high-contrast laser spot. A three-dimensional kinematic model is developed to derive the kinematic relation between the laser spot and its associated image target on an image plane of a camera. A point-tracking technique is proposed to determine two-dimensional pixel...
Abstract The identification for the operational cycles of underground haul trucks is considered in the paper. In previous works related to LHD (Load Haul Dump) vehicles and haul trucks, a hydraulic pressure signal was used. In this paper, it is shown how to determine operational cycles when the pressure sensor in the unloading mechanism is either not available or damaged. The virtual sensor for the identification of operational cycles is based on logical conditions that include standard signals ...
#1Yong Gao (Beihang University)
#2Yanrong Wang (Beihang University)
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Abstract This work aims to investigate the thermal-mechanical behavior of a carbon fiber reinforced silicon carbide (C/SiC) structure under 1600°C high temperature environment. In this test, both the contact and non-contact measurement are used. Four laser vibrometers were used for non-contact measurement. The laser reflection characteristics of C/SiC surface under high temperature were tested. The fiber Bragg grating sensor (FBG) sensor network measures both strain and temperature of the test p...
#1Muammer Burç (İnönü University)
#2Süleyman Köytepe (İnönü University)H-Index: 13
Last.Turgay Seçkin (İnönü University)H-Index: 17
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Abstract In this work, for low level detection of paracetamol (PA) a voltammetric sensor was obtained. Polyimide-multiwall carbon nanotube (PI-MWCNT) composite film was used for modification of platinum (Pt) electrode as selective membrane. Firstly, this PI-MWCNT film was synthesized with 2,5-diaminopyridine (DAP), 4,4′-oxydiphthalic anhydride (ODPA) and MWCNT as a reinforcement by thermal imidization technique. The morphology, micro and chemical structures of the obtained composite film were st...
Abstract By the end of 2018, the Galileo constellation consisted of four in-orbit validation (IOV) satellites and 22 full operational capability (FOC) satellites. Except for GPS and GLONASS, the FOC of Galileo has not been reached. In 2018, four Galileo FOC satellites were launched. With these launches, most of the Galileo FOC has been reached. In this paper, the latest contribution of the Galileo constellation to GPS+GLONASS combined Multi-GNSS precise point positioning (PPP) solutions is analy...
#1Qian Feng (CEA: China Earthquake Administration)H-Index: 8
#2Ming Tang (HUST: Huazhong University of Science and Technology)
Last.Jinping Ou (HIT: Harbin Institute of Technology)H-Index: 40
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Abstract A monolithic all-solid multicore fiber based smart sensing system has been proposed and demonstrated in this paper. This technology enables the monitoring of multiple parameters of interest simultaneously, by spatially multiplexing specific sensing mechanisms seamlessly through different cores. The Raman distributed temperature sensor (RDTS), polarization detection based vibration sensor (PVS) and fiber Bragg grating (FBG) sensor are successfully integrated via a 7-core fiber for vibrat...
#1Mohammed Awadallah (Khalifa University)
#2Ameen El-Sinawi (Khalifa University)H-Index: 8
Abstract Undetected micro-cracks in wind turbine blades lead to failure and costly repairs. Effective remedies depend on proactive measures taken to detect such cracks at early stages. Defects and cracks cause certain shifts in resonant peaks amplitude and frequency (spectral shifts) of the blade depending on the location and dimensions of the crack or damage. Precise location of the crack is difficult to ascertain due to its small dimensions and random causes. This study developed a special Kri...
#1Houria Haneche (USTHB: University of Science and Technology Houari Boumediene)
#2Bachir Boudraa (USTHB: University of Science and Technology Houari Boumediene)H-Index: 6
Last.Abdeldjalil Ouahabi (French Institute of Health and Medical Research)H-Index: 9
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Abstract We propose a novel speech enhancement approach based on compressed sensing. The method performs noise subtraction in the measurement domain in addition to sparse recovery. Dictionary learning, using K-singular value decomposition algorithm, is performed to create an overcomplete dictionary. The noise in the measurement domain is estimated during pauses. Voice activity detection (VAD) is used to classify speech/silence frames. Based on the VAD output, a mask function is created, and appl...
#1Pin Li (UC: University of Cincinnati)H-Index: 3
#2Xiaodong Jia (UC: University of Cincinnati)H-Index: 22
Last.Jay Lee (UC: University of Cincinnati)H-Index: 41
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Abstract Bandsaw machines are widely used in the rough machining stage to cut various materials into required dimensions. Deterioration on the blade, which is a critical component of the bandsaw machine, not only causes a waste of cutting material but also represents a major portion of the operation & maintenance cost for the machine user. Although non-high-end manufactures put as much emphasis on the accuracy of the cuts as high-end manufacturers, non-high-end bandsaw machine users are not as e...
#2Frank Keller (German National Metrology Institute)
Last.Martin Stein (German National Metrology Institute)H-Index: 2
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Abstract The influence of CMM geometric errors on 3D gear measurements is still unclear as the requirement for a gear measurement standard with ideal geometry cannot be fulfilled. To solve this issue, the authors have proposed and developed a software program named Me2Ge to simulate 3D gear measurements with CMMs. This allows a systematic analysis of how gear deviations are affected by geometric errors of a CMM, and how the influence can be reduced. A large gear ring measurement standard and a l...
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