scholarly journals A Study on the Development of Scour Monitoring System Using TDR

2018 ◽  
Vol 18 (5) ◽  
pp. 239-245
Author(s):  
Jung-Doung Yu ◽  
Jong-Sub Lee ◽  
Myeong-Ho Bae ◽  
Junghee Park ◽  
Hyung-Koo Yoon
Keyword(s):  
Monitoring System ◽  
Scour Monitoring

scholarly journals Web-based real time bridge scour monitoring system for disaster management

2014 ◽  
Vol 9 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Mirosław Skibniewski ◽  
Hui-Ping Tserng ◽  
Shen-Haw Ju ◽  
Chung-Wei Feng ◽  
Chih-Ting Lin ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Disaster Management ◽  
Bridge Scour ◽  
Web Based ◽  
Scour Monitoring

scholarly journals Densely distributed and real-time scour hole monitoring using piezoelectric rod sensors

2019 ◽  
Vol 22 (16) ◽  
pp. 3395-3411
Author(s):  
Morgan L Funderburk ◽  
Shieh-Kung Huang ◽  
Chin-Hsiung Loh ◽  
Kenneth J Loh
Keyword(s):  
Monitoring System ◽  
Fundamental Frequency ◽  
Polyvinylidene Fluoride ◽  
Three Dimensional ◽  
Piezoelectric Element ◽  
Direct Calculation ◽  
Thin Strip ◽  
Scour Depth ◽  
Scour Monitoring ◽  
Dry Conditions

This study aims to validate a piezoelectric driven-rod scour monitoring system that can sense changes in scour depth along the entire rod at its instrumented location. The proposed sensor is a polymeric slender rod with a thin strip of polyvinylidene fluoride that runs through its midline. Extraction of the fundamental frequency allows the direct calculation of the exposed length (or scour depth) of the slender rod undergoing fluid flow excitation. First, laboratory validation in dry conditions is presented. Second, hydrodynamic testing of the sensor system in a soil-bed flume is discussed. Each rod was installed using a three-dimensional-printed footing designed for ease of installation and stabilization during testing. The sensors were installed in a layout designed to capture symmetric scour conditions around a scaled pier. In order to analyze the system out of steady-state conditions, water velocity was increased in stages during testing to induce different degrees of scour. As ambient water flow excited the portion of the exposed rods, the embedded piezoelectric element outputted a time-varying voltage signal. Different methods were then employed to extract the fundamental frequency of each rod, and the results were compared. Further testing was also performed to characterize the relationship between frequency outputs and flow velocity, which were previously thought to be independent. In general, the proposed driven-rod scour monitoring system successfully captured changing frequencies under varied flow conditions.

Pier scour monitoring system by bed-level image tracking

2014 ◽  
Vol 29 (2) ◽  
pp. 269-277 ◽  
Author(s):  
Wen-Yi CHANG ◽  
Jihn-Sung LAI ◽  
Teng-Yi YU ◽  
Franco LIN ◽  
Lung-Cheng LEE ◽  
...  
Keyword(s):  
Monitoring System ◽  
Pier Scour ◽  
Image Tracking ◽  
Scour Monitoring
Sign in / Sign up

Export Citation Format

Share Document