...., and also used to determine the locations of cracks or macro-failures. In order to analyze the source location of cracks, it is important to consider the elastic wave propagation velocity, arrival picking, source location analysis algorithm, and sensor array. However, the location of the sensor may...

... Abstract A new optic fiber sensor that enables identification of water presence and its phase change from liquid to solid (namely, from water to ice) at its tip is introduced. When light travelling through material 1 and reaches its boundary, a part of it is refracted and gets into Material 2...

... nickel ore sensor time series vertical axis horizontal axis Experimental Study of the Hydromechanical Response and Liquefaction Susceptibility of Nickel Ore to Maritime Transportation P. Bigarréa*, J.B. Kazmierczaka and S. Collignonb a National Institute for Industrial Environment and Risks...

... Abstract Piezo based transducers are considered smart sensors in contemporary structural health monitoring (SHM) technologies due to their dual functionality of both actuation and sensing. This function can be used to extract structural impedance in the form of electro-mechanical impedance...

... improvements. Some related laboratory and field experiments are introduced in this paper. Finally, the prospect of the mechanical methodology regarding its cost and application is discussed briefly. terashima deformation sensor Akutagawa construction deformation displacement relative displacement...

... the depressurization method. The 6 cm thickness of iron wall of the cell shades the interior from the X-ray CT or the other electric non-destructive inspections. Therefore, the acoustic tomography survey with explosion-proofed piezoelectric sensor was proposed. As a first step, we conducted a preliminary minimal...

... monitoring was developed by KIGAM. This system consists of sensor for seismic events, signal conditioner, operation software and acquisition system of signal data. This self-developed system was applied to the rock slope and deep tunnel. In the application of rock slope, AE system with waveguides was used...

... application leakage cable sensor production monitoring measurement technique borehole october 2014 Sapporo production logging asian rock mechanics symposium arms8 pipeline transport pipeline fibre optical Großwig 8th Asian Rock Mechanics Symposium ARMS8 14-16 October 2014, Sapporo, Japan...

... to large overburden. Upstream Oil & Gas field test asian rock mechanics symposium arms8 Reservoir Characterization ground surface drill pipe receiver p-wave velocity distribution seismic refraction survey tunnel face drill machine sensor drilling capacity yamagami 8th Asian Rock...

... Earthquake iwate-miyagi nairiku earthquake three-dimensional displacement Upstream Oil & Gas Ishibuchi Dam Shimizu monitoring point Nakashima gp displacement sensor deformation 8th Asian Rock Mechanics Symposium ARMS8 14-16 October 2014, Sapporo, Japan Displacement Monitoring of a Rockfill...

... construction method Takayama sensor renewable energy asian rock mechanics symposium arms8 completion excavation 8th Asian Rock Mechanics Symposium ARMS8 14-16 October 2014, Sapporo, Japan Information and Communications Technology for the Construction of Underground Powerhouse Cavern in the Kyogoku...

... and pore pressures inside a formation. Rock compression to mimic a fracture stimulation treatment is simulated by pressurizing one side of one of the rock layers. Accurate linear displacement sensors are used to sense rock layer motion; hence, compression and slip data can be recorded. Additionally...

... changes, its tendon changes its length, which then is transferred to the shift of light blocking metal shield panel. When the shield panel moves, the number of plastic optical fiber receiving sun light changes, from which an approximate values of the anchor force can be identified. Once this sensor is set...

... to the equipment. To overcome this fault, a new system for rock fall monitoring using photoelectric sensors was developed in this study. This technique allows the system to be functioned during long duration without repairs since the sensors can detect rock fall without any contact with rock fragments...

... A New Attempt for Measuring In Situ Strain in Open-Pit Slope under Blasting Loads with FBG Sensors Guoquan Xuab*, Daiyu Xiongb, Xiaoshuang Caob, Yun Duanb, Xin Zhangb aNortheastern University, Shenyan, China bBeijing General Research Institute of Mining&Metallurgy, Beijing, China *Corresponding...

... there is no system in place for continuous monitoring of roof health status of an underground Bord & Pillar coal mine to forecast roof fall events. This paper addresses a multi-hop wireless sensor network (MWSN) based solution for real time monitoring of roof health status in an underground Bord & Pillar...

... of light emitting sensors capable of (1) measuring data and (2) presenting them simultaneously by color of light using LED or other form of light emitting devices. Unlike in a conventional method of data acquisition, the use of these new devices enables real-time data processing and visualization on-site...

... Reservoir Characterization downhole sensor Upstream Oil & Gas rock bolt geophysics Reservoir Surveillance Engineering laboratory Completion Monitoring Systems/Intelligent Wells production monitoring resolution Wang rock mass deformation sensor Dusel fiberoptic sensor geology...

... of its height. The uniaxial cell enables the attachment g t ic sensor for AE measurement. As the acoustic sensor the pauges of type S 9223, produced by the Physical Acoustic Cor- qorallon, USA were used. They allowed measuring in the fre- guency range from 5 kHz up 10 300 k liz. The schematic dia- r...