Application of Infrared Method for Water Detection in Karst Tunnel

2013 ◽  
Vol 838-841 ◽  
pp. 1387-1392 ◽  
Author(s):  
Xin Ming Guo ◽  
Ge Cui ◽  
Ya Peng Fu ◽  
Yong Fang
Keyword(s):  
Infrared Detection ◽  
Karst Tunnel ◽  
Basic Principles ◽  
Great Opportunity ◽  
Water Detection ◽  
Detection Technology ◽  
Geological Conditions ◽  
Karst Areas ◽  
Geological Prediction ◽  
Infrared Method

Water rush and mud rush are two major problems during the process of tunnel construction, which can lead to big troubles. Advanced geological prediction should be carried out to prevent the emergency of water rush and mud rush during the construction in the karst and water-rich areas. Infrared detection technology is a way to detect the hidden water. In this paper, basic principles of model HY-304 infrared detection meter are described, and it is applied in Shuangbei Tunnel. By analyzing the predicted results and comparing it with the situation of excavation, the instrument is feasible as to water rush in karst areas and infrared detection technology has a great opportunity to be applied in the tunnel engineering under complex geological conditions.

scholarly journals Research progress of near-infrared fluorescence immunoassay

2019 ◽  
pp. 001-007
Author(s):  
Ma Ai Jin
Keyword(s):  
Rapid Detection ◽  
Near Infrared ◽  
Infrared Detection ◽  
Research Progress ◽  
Recent Improvement ◽  
Basic Principles ◽  
Detection Technology ◽  
Food Borne ◽  
Highly Sensitive ◽  
Application Potential

Near-infrared fl uorescence immunoassay has been widely studied in the bio analytical fi eld. This review mainly introduces the basic principles of near-infrared spectroscopy and near-infrared detection technology, and summarizes the properties, characteristics and recent improvement of optical properties and signal intensity of three near-infrared fl uorescence probes (i.e. organic fl uorophores, quantum dots and rare earth compounds). We describe the applications of near-infrared fl uorescence technology in immunoassay, and prospect the application potential of lateral fl ow assay (LFA) based on this probe in the rapid detection of pathogens. Our team intends to establish a new platform which has highly sensitive near-infrared fl uorescence probes (NIFPs) combined with portable and simple immunochromatographic test strips (ICTSs) for rapid detection of food borne viruses. This will provide technical support for a rapid detection on the port.

scholarly journals An Enhanced Approach to the Spatial and Statistical Analysis of Factors Influencing Spring Distribution on a Transboundary Karst Aquifer

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2133
Author(s):  
Veronika Iván ◽  
Stefania Stevenazzi ◽  
Licia C. Pollicino ◽  
Marco Masetti ◽  
Judit Mádl-Szőnyi
Keyword(s):  
Karst Aquifer ◽  
Statistical Technique ◽  
Decision Makers ◽  
Protection Measures ◽  
Factors Influencing ◽  
Contact Distance ◽  
Five Factors ◽  
Geological Conditions ◽  
Karst Areas ◽  
Terrain Elevation

Karst aquifers are indispensable, yet vulnerable, resources; therefore, they require a comprehensive protection strategy. Since springs are the terminal points of the karst flow systems, knowledge of their distribution is a key element for the better understanding of groundwater flow, availability and vulnerability. The present study aims to introduce a data-driven analysis by the application of a spatial statistical technique (Weights of Evidence (WofE)) for the evaluation of factors influencing spring distribution in karst areas. A workflow was developed for investigating two questions: where will the springs locate, and where will the permanent springs evolve? This workflow has the potential for application to unconfined karst areas. This enhanced approach was applied to an unconfined transboundary aquifer, the Gömör–Torna Karst (HU and SK). The roles of five factors was statistically investigated: terrain elevation, distance to faults, distance of the carbonate–non-carbonate rock contact, distance to sinkholes, and precipitation distribution. The validation procedures confirmed the effectiveness of the approach. The resulting predictive maps are useful for decision-makers to delineate areas holding potential karst springs and to address water availability problems and protection measures. In addition, the WofE technique improved the comprehension of the geological conditions favourable for the formation of the springs.

Research of Weak Signal Processing Circuit Based on Non-Dispersive Infrared Automobile Exhaust Sensor

2013 ◽  
Vol 336-338 ◽  
pp. 163-167
Author(s):  
Jun Xie ◽  
Yi Long Zhang ◽  
Yue Feng Yuan
Keyword(s):  
Light Source ◽  
Infrared Detection ◽  
Weak Signal ◽  
Gas Concentration ◽  
Automobile Exhaust ◽  
Detection Technology ◽  
Thermopile Sensor ◽  
Gas Chamber ◽  
Modulated Light ◽  
Processing Circuit

Based on the analysis of infrared detection technology and Lambert-Beer law a new kind of quad-channel non-dispersive infrared (NDIR) gas concentration analyzer is designed by applying the modulated IR light source and a quad thermopile sensor into automobile exhaust gases concentration detection. The emphasis is paid on the analysis of modulated light source, gas chamber, sensor and the acquisition and processing circuit of the signal. The result of simulation and analysis of the designed circuit proved the feasibility of the design.

Application Research of Geological Radar in Volcanic Lava in the Geological Survey

2012 ◽  
Vol 226-228 ◽  
pp. 2093-2097
Author(s):  
Qiao Lin Xiao ◽  
Fen Lü
Keyword(s):  
Radar Signal ◽  
Wave Group ◽  
Geological Interpretation ◽  
Detection Technology ◽  
Image Characteristics ◽  
Geological Conditions ◽  
Volcanic Lava ◽  
Change Trend ◽  
Effective Use ◽  
Design And Construction

Aiming at the Hainan volcanic lava the geological characteristics, the application of geological radar detection technology in the geological environment of signal respond, combined with the added drilling data is compared, established the goal of geological radar image characteristics of geology, summarized the poor geological conditions in the area of geological radar signal response law. Field test shows that the radar reflected wave group of wave characteristic in volcanic lava can distinguish different geological layer reflection wave group, and via studying their relationship and change trend, to achieve the purpose of geological interpretation, and determine the adverse lava geology development stages , for design and construction to provide the reliable foundation material, effective use of survey for the design and construction of the guidance function.

scholarly journals The Application of Tunnel Reflection Tomography in Tunnel Geological Advanced Prediction Based on Regression Analysis

2015 ◽  
Vol 9 (1) ◽  
pp. 805-810
Author(s):  
Jun Li ◽  
Zong-lin Wang
Keyword(s):  
Regression Analysis ◽  
Complex Dynamics ◽  
Water Inrush ◽  
Karst Water ◽  
Geological Conditions ◽  
Geological Prediction ◽  
Influence Degree ◽  
Reflection Tomography ◽  
Complex Geology ◽  
Mountain Tunnel

In the tunnel construction, due to the limitation of the survey and design and the complex dynamics of tunnel surrounding rock geological conditions, so it is difficult for complex geology with the microscopic accurate grasp, often which caused by geological exploration data do not tally with the actual situation, often encountered in karst water inrush, large deformation in weak rock, cave-in subsidence, geological hazards, such as gas outburst, rock burst cause person casualties, delays, in order to minimize geological disaster influence degree, advanced geological prediction before construction is very necessary. Using regression analysis, based on engineering vault subsidence and horizontal convergence has carried on the regression analysis, research results can be reference for related engineering design and construction. Detailed introduces the principle, methods and outstanding characteristic of tunnel reflection tomography advanced prediction system, and take Jianfengling mountain tunnel of Darui line railway as an example, the prediction results are analyzed in detailed processing, and on-site validation, finally points out the problem for further study the technology.

Design of Intelligent System for Soccer Goal Detection Based on Opto-Electronic Technology

2013 ◽  
Vol 717 ◽  
pp. 585-587
Author(s):  
Qing Lai Zhang ◽  
Xin Ming Tian ◽  
Zhan Ling Meng
Keyword(s):  
High Speed ◽  
Intelligent System ◽  
High Technology ◽  
Infrared Detection ◽  
World Cup ◽  
Detection Technology ◽  
The World ◽  
Goal Detection ◽  
The Moment

With the continuous development of football games, more and more football matches are hold in the world. From the World Cup to the big league, the erroneous decisions of the goals by referee always became the focus of the games. Federation International de Football Association (FIFA) is discussing now to introduce high technology to the football games to assist the judgment of the referee. In this paper, an advanced detection technology for soccer goal is proposed. This goal detection technology is based on the optical principle, high speed camera, as long as infrared detection devices. By detecting the change of electronic signal in the moment of goal, which can cut off the laser beam, the goal can be detected. In addition, the detection results and in-situ video are transmitted in real time to the arbitrators, which can reduce the goal disputes and make the game of football more fair.

Research on the Construction Technique of Super-Large Diameter Rock-Socketed Piles in Karst Areas

2012 ◽  
Vol 446-449 ◽  
pp. 1486-1490
Author(s):  
Hao Feng Xing ◽  
Ming Hui Meng ◽  
Wan Xue Long ◽  
Guan Bao Ye ◽  
Wen Yong He
Keyword(s):  
Relative Density ◽  
Clay Soil ◽  
Large Diameter ◽  
Soil Layer ◽  
Guizhou Province ◽  
Geological Condition ◽  
Construction Technique ◽  
Research Results ◽  
Geological Conditions ◽  
Karst Areas

It is difficult for the large diameter pile to bore the hole and ensure its quality under the complicated geological condition in karst areas. In order to get the feasible construction method, the construction technique of super-large diameter rock-socketed piles in karst areas was explored in this paper on the basis of Hezhang Super Maior Bridge project in Guizhou province. The adaptability of the construction plan at this site was expounded firstly; and then the technologies for dealing with the problems of buried hammer, inclined hole, slurry leakage, which often occur during the process of boring pile hole under complicated geological conditions, were deeply researched. The research results show that it is effective to use the slurry with the relative density of 1.30 to 1.35 to prevent the pebble soil layer from collapsing, to prevent the pile hole from inclining by backfilling rubble in tilted stratum, to treat the slurry leakage problem by backfilling rubble, clay soil and bagged cement; and to handle the hammer stuck through the skills of underwater blasting, salvaging with pothook and light pounding with small hammer. It is proved that the method of light pounding with small hammer is preferable to handle the stuck hammer occured in backfill hole. The study provides the theoretical guidance and reference for similar projects.

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