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.

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.

Acoustic Emission in Laser Surface Cleaning for Real-Time Monitoring

1995 ◽  
Vol 34 (Part 2, No. 11B) ◽  
pp. L1557-L1560 ◽  
Author(s):  
Yong-Feng Lu ◽  
Yoshinobu Aoyagi
Keyword(s):  
Acoustic Emission ◽  
Real Time ◽  
Surface Cleaning ◽  
Laser Surface ◽  
Real Time Monitoring

scholarly journals Automated data collection and real-time data analysis suite for serial synchrotron crystallography

2019 ◽  
Vol 26 (1) ◽  
pp. 244-252 ◽  
Author(s):  
Shibom Basu ◽  
Jakub W. Kaminski ◽  
Ezequiel Panepucci ◽  
Chia-Ying Huang ◽  
Rangana Warshamanage ◽  
...  
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
Real Time ◽  
Analysis Software ◽  
Time Data ◽  
Automatic Data ◽  
Data Merging ◽  
Real Time Analysis ◽  
Initial Location ◽  
Automated Data Processing

At the Swiss Light Source macromolecular crystallography (MX) beamlines the collection of serial synchrotron crystallography (SSX) diffraction data is facilitated by the recent DA+ data acquisition and analysis software developments. The SSX suite allows easy, efficient and high-throughput measurements on a large number of crystals. The fast continuous diffraction-based two-dimensional grid scan method allows initial location of microcrystals. The CY+ GUI utility enables efficient assessment of a grid scan's analysis output and subsequent collection of multiple wedges of data (so-called minisets) from automatically selected positions in a serial and automated way. The automated data processing (adp) routines adapted to the SSX data collection mode provide near real time analysis for data in both CBF and HDF5 formats. The automatic data merging (adm) is the latest extension of the DA+ data analysis software routines. It utilizes the sxdm (SSX data merging) package, which provides automatic online scaling and merging of minisets and allows identification of a minisets subset resulting in the best quality of the final merged data. The results of both adp and adm are sent to the MX MongoDB database and displayed in the web-based tracker, which provides the user with on-the-fly feedback about the experiment.

scholarly journals Radiation Risk Assessment on Public in Motijheel Thana, Dhaka, Bangladesh

2021 ◽  
Vol 9 (1) ◽  
pp. 23-31
Author(s):  
Mohammed Belayet Hossain ◽  
Dr. Mohammad Sohelur Rahman ◽  
Dr. Mohammad Amir Hossain Bhuiyan ◽  
Selina Yeasmin
Keyword(s):  
Cancer Risk ◽  
Effective Dose ◽  
Real Time ◽  
Annual Effective Dose ◽  
Life Time ◽  
Radiation Monitoring ◽  
Radiation Hazard ◽  
Monitoring Device ◽  
The Real ◽  
Average Value

Objective: The pollution free environment is required for healthy life. The real-time radiation monitoring is very important for radiation hazard detection in the environment. The excess life-time cancer risk (ELCR) on public is to assess based on the real-time radiation monitoring data in the area. Methods: The real-time radiation monitoring was performed using portable digital radiation monitoring device. This real-time digital portable radiation monitoring device meets all European CE standards as well as the American “FCC 15 standard”. The real-time digital portable radiation monitoring device was placed at 1 meter above the ground on tripod and data collection time for each monitoring point (MP) was 1 hour. 27 MPs were chosen for collection of real-time radiation data at various outdoor environment in Motijheel Thana, Dhaka from May-August 2018.Results: The real-time radiation dose rates at Motijheel Thana due to natural radionuclides were ranged from 0.095 ± 0.041 µSv.h-1 to 0.185 ± 0.042 µSv.h-1 with an average of 0.147 ± 0.047 µSv.h-1. The annual effective dose to public from outdoor environmental radiation at Motijheel Thana were found to be 0.166 ± 0.066 mSv to 0.324 ± 0.061 mSv with an average of 0.257 ± 0.039 mSv. Excess Life-time Cancer Risk (ELCR) on public are also estimated based on annual effective dose that is ranged from 0.662 ×10-3 to 1.289 ×10-3 with an average value of 1.025 ×10-3, which is higher than world average value of 0.29×10-3. Conclusion: This type of study is required for detection of the radiation hazard arising from the natu-ral as well as man-made sources and also for generation of the baseline database. From this study, it is observed that there is no pose any radiation hazard in the study area due to man-made sources.

Real-time distortion monitoring during fused deposition modeling via acoustic emission

2019 ◽  
Vol 19 (2) ◽  
pp. 412-423 ◽  
Author(s):  
Feng Li ◽  
Zhonghua Yu ◽  
Zhensheng Yang ◽  
Xuanwei Shen
Keyword(s):  
Acoustic Emission ◽  
Real Time ◽  
Acoustic Emission Signal ◽  
Fused Deposition Modeling ◽  
Emission Signal ◽  
Fused Deposition ◽  
Modeling Process ◽  
Deposition Modeling ◽  
Part Distortion ◽  
Quality Diagnosis

Fused deposition modeling is a popular technique for three-dimensional prototyping since it is cost-effective, convenient to operate, and environment-friendly. However, the low quality of its printed products jeopardizes its future development. Distortion, also known as warping deformation, which is caused by many factors such as inappropriate process parameters and process drifts, is one of the most common defects in the fused deposition modeling process. Rapid detection of such part distortion during the printing process is beneficial for improving the production efficiency and saving materials. In this article, a real-time part distortion monitoring method based on acoustic emission is presented. Our work is to identify distortion defects and understand the condition of the distortion area through sensing and digital signal processing techniques. In our experiments, both the acoustic emission hits and original signals were acquired during the fused deposition modeling process. Then, the acoustic emission hits were analyzed. Ensemble empirical mode decomposition was utilized to eliminate noise and extract features from the original acoustic emission signal to further analyze the acoustic emission signal in the case of part distortion. Furthermore, the root mean square of the reconstructed signals was calculated, and the prediction results are strongly correlated with the ground truth printing states. This work provides a promising method for the quality diagnosis of printing parts.

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