scholarly journals Applications of ultrasound imaging system for measuring water-sand parameters during sediment transport process in hydraulic model experiments

2017 ◽  
Vol 20 (2) ◽  
pp. 410-423 ◽  
Author(s):  
Xianjian Zou ◽  
Chuanying Wang ◽  
Huan Song ◽  
Zengqiang Han ◽  
Zhimin Ma ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Flow Velocity ◽  
Ultrasound Imaging ◽  
Transport Process ◽  
Imaging System ◽  
Hydraulic Model ◽  
Space Distribution ◽  
Incipient Motion ◽  
Model Experiments ◽  
Sediment Incipient Motion

Abstract Moving particles and the topographic bed under muddy water or in sediment-laden flow are often clouded by suspended sediments, making it hard to detect or analyze for visualization. This paper concerns applications of ultrasound imaging measurement method for the visual measurement of related water-sand parameters during sediment transport process in hydraulic model experiments. We use a B-mode ultrasound imaging system to measure the related parameters of suspended sediment concentration (SSC), underwater topographic riverbed, flow velocity and sediment incipient motion, conducted at a water channel. A comprehensive measuring system for the visualization of multiple water-sand parameters is established. Results show that the measurement and analysis of SSC and its space distribution, topography bedform, flow velocity and flow field, and sediment incipient velocity can be realized. Ultrasound imaging measurements of SSC and their space distribution can be shown in real time, and also dynamic monitoring and analysis of sediment incipient motion and topography bedform during the sediment transport process. This method realizes the experimental visualization of the topographic bed and sediment-laden flow. Application of an ultrasound imaging measurement system has promoted the development of sediment movement law research and related hydraulic model experiment measurement technique.

Study on the Characteristics of Sediment Incipient Motion in Pressure Pipeline

2014 ◽  
Vol 1010-1012 ◽  
pp. 1028-1032
Author(s):  
Ming Hui Lei ◽  
Rui Hua Nie ◽  
Su Qin Yuan ◽  
Xing Nian Liu
Keyword(s):  
Experimental Data ◽  
Velocity Distribution ◽  
Critical Velocity ◽  
Incipient Motion ◽  
Generalized Model ◽  
Model Experiments ◽  
Pressure Pipeline ◽  
Recorded Data ◽  
Sediment Incipient Motion

The generalized model experiments were designed and conducted in the pressure pipeline to investigate the characteristic of sediment incipient motion. There were some differences between the measured sediment critical velocity and the predictive one which was calculated by traditional formulas. In this paper, the analyses of velocity distribution and its corresponding effect on the sediment incipient motion in the pressure pipeline are done. Then, a simple but available formula which is suitable for the prediction of sediment critical velocity in the pressure pipeline is proposed. Finally, this formula is verified by experimental data and good agreements are observed between the recorded data and predictions.

HYDRAULIC MODEL EXPERIMENTS ON THE INFLUENCE OF SUBMERGED BREAKWATERS ON THE LONGSHORE SEDIMENT TRANSPORT

2018 ◽  
Vol 74 (2) ◽  
pp. I_943-I_948
Author(s):  
Kenji NOGUCHI ◽  
Naoki FUKUHARA ◽  
Fuminori KATO ◽  
Takahiro IWASA ◽  
Masayoshi SHIRAYAMA ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Hydraulic Model ◽  
Model Experiments ◽  
Longshore Sediment Transport

HYDRAULIC MODEL EXPERIMENTS TO UNDERSTAND INFLUENCE OF UPCOAST STRUCTURES ON MEASURES AGAINST CLOGGING OF THE MOTOFUJI CALVERT

2019 ◽  
Vol 75 (2) ◽  
pp. I_541-I_546
Author(s):  
Masaki IKEDA ◽  
Hiroshige MATSUMOTO ◽  
Fumiaki ITO ◽  
Satoshi HENMI ◽  
Go ASANO
Keyword(s):  
Hydraulic Model ◽  
Model Experiments

scholarly journals Artificial Intelligence Application on Sediment Transport

2021 ◽  
Vol 9 (6) ◽  
pp. 600
Author(s):  
Hyun Dong Kim ◽  
Shin-ichi Aoki
Keyword(s):  
Sediment Transport ◽  
Numerical Models ◽  
Beach Nourishment ◽  
Hydraulic Model ◽  
Alternative Methods ◽  
Cross Sectional ◽  
Sand And Gravel ◽  
Incident Waves ◽  
Artificial Intelligence Application ◽  
Deep Learning Model

When erosion occurs, sand beaches cannot maintain sufficient sand width, foreshore slopes become steeper due to frequent erosion effects, and beaches are trapped in a vicious cycle of vulnerability due to incident waves. Accordingly, beach nourishment can be used as a countermeasure to simultaneously minimize environmental impacts. However, beach nourishment is not a permanent solution and requires periodic renourishment after several years. To address this problem, minimizing the period of renourishment is an economical alternative. In the present study, using the Tuvaluan coast with its cross-sectional gravel nourishment site, four different test cases were selected for the hydraulic model experiment aimed at discovering an effective nourishment strategy to determine effective alternative methods. Numerical simulations were performed to reproduce gravel nourishment; however, none of these models simultaneously simulated the sediment transport of gravel and sand. Thus, an artificial neural network, a deep learning model, was developed using hydraulic model experiments as training datasets to analyze the possibility of simultaneously accomplishing the sediment transport of sand and gravel and supplement the shortcomings of the numerical models.

Single-element Ultrasound Imaging System based on Mirror Scanning

2020 ◽  
Author(s):  
Seongwook Choi ◽  
Jin Young Kim ◽  
Hae Gyun Lim ◽  
Jin Woo Baik ◽  
Hyung Ham Kim ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Imaging System ◽  
Single Element

scholarly journals Validation of Scolioscan Air-Portable Radiation-Free Three-Dimensional Ultrasound Imaging Assessment System for Scoliosis

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2858
Author(s):  
Kelly Ka-Lee Lai ◽  
Timothy Tin-Yan Lee ◽  
Michael Ka-Shing Lee ◽  
Joseph Chi-Ho Hui ◽  
Yong-Ping Zheng
Keyword(s):  
Ultrasound Imaging ◽  
Imaging System ◽  
Outcome Measurement ◽  
Three Dimensional ◽  
3D Ultrasound ◽  
Mean Difference ◽  
Assessment System ◽  
Absolute Difference ◽  
Data Sets ◽  
Low Profile

To diagnose scoliosis, the standing radiograph with Cobb’s method is the gold standard for clinical practice. Recently, three-dimensional (3D) ultrasound imaging, which is radiation-free and inexpensive, has been demonstrated to be reliable for the assessment of scoliosis and validated by several groups. A portable 3D ultrasound system for scoliosis assessment is very much demanded, as it can further extend its potential applications for scoliosis screening, diagnosis, monitoring, treatment outcome measurement, and progress prediction. The aim of this study was to investigate the reliability of a newly developed portable 3D ultrasound imaging system, Scolioscan Air, for scoliosis assessment using coronal images it generated. The system was comprised of a handheld probe and tablet PC linking with a USB cable, and the probe further included a palm-sized ultrasound module together with a low-profile optical spatial sensor. A plastic phantom with three different angle structures built-in was used to evaluate the accuracy of measurement by positioning in 10 different orientations. Then, 19 volunteers with scoliosis (13F and 6M; Age: 13.6 ± 3.2 years) with different severity of scoliosis were assessed. Each subject underwent scanning by a commercially available 3D ultrasound imaging system, Scolioscan, and the portable 3D ultrasound imaging system, with the same posture on the same date. The spinal process angles (SPA) were measured in the coronal images formed by both systems and compared with each other. The angle phantom measurement showed the measured angles well agreed with the designed values, 59.7 ± 2.9 vs. 60 degrees, 40.8 ± 1.9 vs. 40 degrees, and 20.9 ± 2.1 vs. 20 degrees. For the subject tests, results demonstrated that there was a very good agreement between the angles obtained by the two systems, with a strong correlation (R2 = 0.78) for the 29 curves measured. The absolute difference between the two data sets was 2.9 ± 1.8 degrees. In addition, there was a small mean difference of 1.2 degrees, and the differences were symmetrically distributed around the mean difference according to the Bland–Altman test. Scolioscan Air was sufficiently comparable to Scolioscan in scoliosis assessment, overcoming the space limitation of Scolioscan and thus providing wider applications. Further studies involving a larger number of subjects are worthwhile to demonstrate its potential clinical values for the management of scoliosis.

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