Time-domain reflectometry–based real-time slope stability monitoring in opencast mines: A review

2020 ◽  
pp. 095745652092481
Author(s):  
Ajay Kumar
Keyword(s):  
Slope Stability ◽  
Real Time ◽  
Time Domain ◽  
Slope Failure ◽  
Low Cost ◽  
Mining Area ◽  
Time Domain Reflectometry ◽  
Stability Monitoring ◽  
Opencast Mines ◽  
Failure Conditions

Time-domain reflectometry plays a crucial role in slope stability. Slope stability factors are an important parameter in the mining regions over opencast mine slope failure. Conventional methods are oldest as well as poorest risk assessments for monitoring and predication over slope failure conditions. Time-domain reflectometry application has been used among various fields of research at different areas of interest. But, it is implemented in mining area at opencast mines for phonographic review over slope failure conditions. This is a recent technology with low cost, which uses a wireless transmission system for high-risk assessment over slope stability measurement by received signal strength indicator. Moreover, this research is more suitable for monitoring of slope stability as well as less complex about time-domain reflectometry application of installation and real-time slope stability monitoring. The review case of time-domain reflectometry application is linked into the mining area. So, this result is best suitability of time-domain reflectometry and the Internet of things for real-time slope stability monitoring in opencast mines.

scholarly journals Potential of time domain reflectometry as early warning system in slope stability monitoring project: A review

2016 ◽  
Author(s):  
Nur S. M. A. Wahab ◽  
Ng W. K. ◽  
Nor H. H. Abdullah ◽  
Anas Ibrahim ◽  
Mohd R. A. Majid ◽  
...  
Keyword(s):  
Slope Stability ◽  
Time Domain ◽  
Early Warning ◽  
Early Warning System ◽  
Warning System ◽  
Time Domain Reflectometry ◽  
Stability Monitoring

scholarly journals A Review of Modern CMOS Transimpedance Amplifiers for OTDR Applications

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1073 ◽  
Author(s):  
Agata Romanova ◽  
Vaidotas Barzdenas
Keyword(s):  
Time Domain ◽  
Figure Of Merit ◽  
Low Cost ◽  
Performance Comparison ◽  
Time Domain Reflectometry ◽  
Basic Principles ◽  
Transimpedance Amplifiers ◽  
Concise Review ◽  
Optical Time Domain Reflectometry ◽  
Optical Time

The work presents a review of modern CMOS transimpedance amplifiers (TIAs) in the context of their application for low-cost optical time-domain reflectometry (OTDR). After introducing the basic principles behind the OTDR, the requirements for a suitable CMOS TIA are presented and discussed. A concise review of several basic TIA topologies is provided with a brief overview of their main properties. A detailed discussion is given on a representative set of approaches reported in the literature and the figure of merit (FOM) is introduced as a unified basis for performance comparison. Limitations of a single FOM as a basis for comparison are pointed out. Based on the provided discussion, some suggestions are made on the suitability of the TIA topologies for OTDR applications.

scholarly journals Intraoperative imaging based on common-path time-domain reflectometry for brain tumor surgery

2020 ◽  
Vol 50 (2) ◽  
Author(s):  
Jae-Ho Han ◽  
Jaepyeong Cha
Keyword(s):  
Brain Tumor ◽  
Real Time ◽  
Time Domain ◽  
Near Infrared ◽  
Intraoperative Imaging ◽  
Tumor Resection ◽  
Time Domain Reflectometry ◽  
Optical Path ◽  
Fiber Probe ◽  
Common Path

Minimally invasive intraoperative imaging plays a crucial role in delicate microsurgeries for precise operation monitoring in which fiber optic imaging can be considered as an endoscopy and surgical proximity guidance tool due to its compactness. This paper presents a near-infrared time-domain reflectometric common-path optical coherence tomography imaging technique using a bare-fiber probe mounted directly on a scanning galvanometer. The common-path setup allows the use of a freely adjustable optical path length and a disposable fiber probe, as well as eliminating the need for an additional dedicated reference optical path. Experimental results demonstrate clear discrimination between the brain tumor tissue and the normal tissue for mouse brains with the images acquired in real-time over a wide area. The proposed method enables real-time and in situ visualization of tumor resection for intraoperative imaging, and this study demonstrates the feasibility of its application to microsurgical interventions.

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