Application of Slope Safety Automatic Monitoring Technology in the Project of Road No.1 in Republic of Congo

2012 ◽  
Vol 256-259 ◽  
pp. 1429-1433
Author(s):  
Pan Yang ◽  
Shu Dong Zhang ◽  
Jun Mei Guo ◽  
Cheng Xuan Ma ◽  
You Cheng Shen ◽  
...  
Keyword(s):  
Real Time ◽  
Slip Surface ◽  
Automatic Monitoring ◽  
Displacement Monitoring ◽  
Republic Of Congo ◽  
Local Climate ◽  
Wireless Data Transmission ◽  
Surface Prediction ◽  
Slope Displacement ◽  
Slope Safety

Slope safety has been well concerned by the society in recent years. Slope displacement monitoring is an important subject of slope safety and its research has been developing rapidly. In this article, we draw up a pilot slope safety automatic monitoring scheme for the project of Road No.1 in Republic of Congo, which depends on real-time displacement monitoring. This scheme uses fixed inclinometer as its main appliance and achieves wireless data transmission. During this process, we considered both local climate and the characteristics of high slopes along the road, and finished a series of work including monitoring position selection, critical slip surface prediction and finally monitoring system establishment. Our ultimate objective is to achieve real-time monitoring of slope situation, and furthermore set up the relationship among slope displacement, rainfall and time. With the derived relationship we would be able to forecast the development of slope deformation and possible danger caused by the slopes.

scholarly journals Acoustic emission instrumentation method for slope monitoring

2019 ◽  
Vol 92 ◽  
pp. 18010
Author(s):  
Bernardo Caicedo ◽  
Fernando Patino-Ramirez
Keyword(s):  
Acoustic Emission ◽  
Real Time ◽  
Slip Surface ◽  
Field Testing ◽  
Monitoring Device ◽  
Analysis Software ◽  
Laboratory Results ◽  
Slope Monitoring ◽  
Active Waveguide ◽  
Slope Displacement

Applications using acoustic emission techniques have shown promising results for slope monitoring. This study proposes a modified active waveguide slope monitoring device with AE measurement at either end of the device which is capable of calculating deformation profiles in real time besides its common use as an alarm method. The coupled calibration methodology allows the location of the slip surface and quantification of slope displacement accounting for the efficiency of the sensors and for attenuation due to distance between an event and the sensors. An analysis software is presented too, in order to propose the algorithms necessary to quantify deformation profiles in real time. The present study proposed some guidelines to perform further field testing based on the procedures and analysis algorithms proposed that showed promising laboratory results.

scholarly journals Real-Time Safety Evaluation for Slope during Construction Using Numerical Forecast and Sensor Monitoring Platform

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2978 ◽  
Author(s):  
Sherong Zhang ◽  
Dejun Hou ◽  
Chao Wang ◽  
Xuexing Cao ◽  
Fenghua Zhang ◽  
...  
Keyword(s):  
Numerical Model ◽  
Real Time ◽  
Evaluation System ◽  
Large Scale ◽  
Safety Evaluation ◽  
The Real ◽  
Study Results ◽  
Data Feedback ◽  
Numerical Forecast ◽  
Slope Safety

Geology uncertainties and real-time construction modification induce an increase of construction risk for large-scale slope in hydraulic engineering. However, the real-time evaluation of slope safety during construction is still an unsettled issue for mapping large-scale slope hazards. In this study, the real-time safety evaluation method is proposed coupling a construction progress with numerical analysis of slope safety. New revealed geological information, excavation progress adjustment, and the support structures modification are updating into the slope safety information model-by-model restructuring. A dynamic connection mapping method between the slope restructuring model and the computable numerical model is illustrated. The numerical model can be generated rapidly and automatically in database. A real-time slope safety evaluation system is developed and its establishing method, prominent features, and application results are briefly introduced in this paper. In our system, the interpretation of potential slope risk is conducted coupling dynamic numerical forecast and monitoring data feedback. The real case study results in a comprehensive real-time safety evaluation application for large slope that illustrates the change of environmental factor and construction state over time.

Design of Underground Displacement Monitoring Circuit Based on STC89C58

2014 ◽  
Vol 602-605 ◽  
pp. 1916-1919
Author(s):  
Ke Gang Hu ◽  
Yi Lian Zhou ◽  
Qing Li
Keyword(s):  
System Design ◽  
Real Time ◽  
Humidity Sensor ◽  
Experimental Results ◽  
Stable Operation ◽  
Displacement Monitoring ◽  
Acceleration Sensor ◽  
The Core ◽  
Hardware System ◽  
Working Principle

Using STC89C58 MCU as the core, through the acceleration sensor and a humidity sensor for the monitoring the displacement of underground conditions, to simply realize real-time monitoring function of the displacement of underground. Introduces the working principle and software/hardware system design. The experimental results show that, the system has stable operation, achieved the expected goals.

The Design of Landslide Hazard Remote Monitoring System Based on STM32 MCU and GPRS

2014 ◽  
Vol 599-601 ◽  
pp. 1115-1119 ◽  
Author(s):  
Jing Luo Cai ◽  
Guan Li ◽  
Xiang Li Bu ◽  
Xian Guo Liu ◽  
Hua Lu Xing
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Remote Monitoring ◽  
Landslide Hazard ◽  
Remote Monitoring System ◽  
Geological Disaster ◽  
Disaster Monitoring ◽  
Stable Performance ◽  
Slope Displacement ◽  
Landslide Disaster

By studying the occurrence and distribution of landslide disaster, remote monitoring system for landslide hazard was developed which using STM32 microcomputer and GPRS comunication technology. The changes of slope inclination, slope displacement and rainfall were acquained in real time. Experimental results showed that the use of the system on the slope of geological disaster monitoring is convenient and with stable performance.

Position-based impedance force controller with sensorless force estimation

2019 ◽  
Vol 39 (3) ◽  
pp. 489-496 ◽  
Author(s):  
Jianjun Yuan ◽  
Yingjie Qian ◽  
Liming Gao ◽  
Zhaohan Yuan ◽  
Weiwei Wan
Keyword(s):  
Real Time ◽  
External Force ◽  
Force Control ◽  
Impedance Control ◽  
Surface Shape ◽  
Force Estimation ◽  
Shape Information ◽  
Content Type ◽  
Generalized Inverse Matrix ◽  
Surface Prediction

Purpose This paper aims to purpose an improved sensorless position-based force controller in gravitational direction for applications including polishing, milling and deburring. Design/methodology/approach The first issue is the external force/torque estimation at end-effector. By using motor’s current information and Moore-Penrose generalized inverse matrix, it can be derived from the external torques of every joints for nonsingular cases. The second issue is the force control strategy which is based on position-based impedance control model. Two novel improvements were made to achieve a better performance. One is combination of impedance control and explicit force control. The other one is the real-time prediction of the surface’s shape allowing the controller adaptive to arbitrary surfaces. Findings The result of validation experiments indicates that the estimation of external force and prediction of surface’s shape are credible, and the position-based constant contact force controller in gravitational direction is functional. The accuracy of force tracking is adequate for targeted applications such as polishing, deburring and milling. Originality/value The value of this paper lies in three aspects which are sensorless external force estimation, the combination of impedance control and explicit force control and the independence of surface shape information achieved by real-time surface prediction.

scholarly journals Urban Emissions of CO2 from Davos, Switzerland: The First Real-Time Monitoring System Using an Atmospheric Inversion Technique

2013 ◽  
Vol 52 (12) ◽  
pp. 2654-2668 ◽  
Author(s):  
Thomas Lauvaux ◽  
Natasha L. Miles ◽  
Scott J. Richardson ◽  
Aijun Deng ◽  
David R. Stauffer ◽  
...  
Keyword(s):  
Real Time ◽  
Urban Areas ◽  
Atmospheric Model ◽  
Cold Wave ◽  
Local Climate ◽  
Diurnal Cycles ◽  
Mixing Ratios ◽  
Highly Correlated ◽  
The City ◽  
Atmospheric Inversion

AbstractAnthropogenic emissions from urban areas represent 70% of the fossil fuel carbon emitted globally according to carbon emission inventories. The authors present here the first operational system able to monitor in near–real time daily emission estimates, using a mesoscale atmospheric inversion framework over the city of Davos, Switzerland, before, during, and after the World Economic Forum 2012 Meeting (WEF-2012). Two instruments that continuously measured atmospheric mixing ratios of greenhouse gases (GHGs) were deployed at two locations from 23 December 2011 to 3 March 2012: one site was located in the urban area and the other was out of the valley in the surrounding mountains. Carbon dioxide, methane, and carbon monoxide were measured continuously at both sites. The Weather Research and Forecasting mesoscale atmospheric model (WRF), in four-dimensional data assimilation mode, was used to simulate the transport of GHGs over the valley of Davos at 1.3-km resolution. Wintertime emissions prior to the WEF-2012 were about 40% higher than the initial annual inventory estimate, corresponding to the use of heating fuel in the winter. Daily inverse fluxes were highly correlated with the local climate, especially during the severe cold wave that affected most of Europe in early February 2012. During the WEF-2012, emissions dropped by 35% relative to the first month of the deployment, despite similar temperatures and the presence of several thousand participants at the meeting. On the basis of composite diurnal cycles of hourly CO/CO2 ratios, the absence of traffic peaks during the WEF-2012 meeting indicated that change in road emissions is potentially responsible for the observed decrease in the city emissions during the meeting.

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