Study on 3-D Measurement Method in Shake Table Tests Using Image Processing Technique: 2nd Report - Measurement Accuracy in Actual Fracturing Test Using Full Scale Wooden House Model

2004 ◽  
Author(s):  
Satoshi Fujita ◽  
Osamu Furuya ◽  
Tadashi Mikoshiba
Keyword(s):  
Measurement System ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Three Dimensional ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Shake Table ◽  
Shake Table Tests ◽  
Wooden House ◽  
Three Dimensional Measurement

This study has been examined about a three-dimensional measurement method that can measure a position and an attitude of test object without any contact. Fundamental hardware and software in measurement system has been constructed until now. Moreover, the fundamental dynamic measurement accuracy and effectiveness of the proposed measurement system has been confirmed from the several shake table tests. This paper describes the effectiveness of the proposed system for the measurement in fracturing test using real scale wooden house model.

Study on 3-D Measurement Method in Shake Table Tests Using Image Processing Technique: 3rd Report, Examination of Upgrading for Measurement Accuracy in Actual Fracturing Test

2005 ◽  
Author(s):  
Satoshi Fujita ◽  
Osamu Furuya ◽  
Hiroki Mizuno
Keyword(s):  
Image Processing ◽  
Measurement System ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Three Dimensional ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Shake Table ◽  
Shake Table Tests ◽  
Dynamic Displacement

In recent years, the importance of the fracturing test using the full-scale model is recognized in order to upgrade an earthquake resistant design. It is, moreover, important to develop a new measurement method which can measure a complex three-dimensional behaviour in such fracturing test. This study has been doing research and development of three-dimensional measurement method using an image processing technique for a measurement of dynamic displacement in shake table test without any contact. This measurement system is a very convenient system because it can measure the three-dimensional dynamic displacement in the simple experimental condition that the several makers are only attached to the surface of an experimental structure. The system therefore is the most suitable measurement system for an evaluation of complex 3-dimensional behavior of test model. Fundamental hardware and software for the measurement system has been constructed until now. The fundamental dynamic measurement accuracy and effectiveness of the measurement system has been also confirmed from several shake table tests. This paper describes the examination of the upgrading for the measurement accuracy in actual fracturing test. Moreover, the shake table test results using actual wooden house model were also indicated.

Study on 3-D Measurement Method in Shake Table Tests Using Image Processing Technique: 1st Report - Verification of Synthetic Performance of the Measurement System

2004 ◽  
Author(s):  
Satoshi Fujita ◽  
Osamu Furuya ◽  
Yasushi Niitsu
Keyword(s):  
Measurement System ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Dynamic Measurement ◽  
Processing Technique ◽  
Shake Table Test ◽  
Image Processing Technique ◽  
Shake Table ◽  
Shake Table Tests ◽  
3 Dimensional

This study has been doing research and development of 3-dimensional measurement method using the image processing technique for the measurement of dynamic displacement in shake table test. This measurement system is a very convenient system because it can measure the three-dimensional dynamic displacement in shake table test in which the several makers are only attached to the surface of an experimental structure. The system therefore is the most suitable measurement system for an evaluation of complex 3-dimensional behavior of experimental model. Fundamental hardware and software for the measurement system have been constructed until now. The fundamental dynamic measurement accuracy and effectiveness of the measurement system have been also confirmed from several shake table tests. This paper describes the dynamic measurement accuracy in shake table test in with the experimental model has several rotational behaviors, and also summarizes the synthetic performance of the proposed measurement system.

Study on 3-D Measurement Method Using Image Processing Technique for Dynamic Displacement in Shake Table Tests

2003 ◽  
Author(s):  
Satoshi Fujita ◽  
Osamu Furuya ◽  
Yasushi Niitsu ◽  
Tadashi Mikoshiba ◽  
Daisuke Nakano
Keyword(s):  
Measurement System ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Dynamic Measurement ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Shake Table ◽  
Shake Table Tests ◽  
Dynamic Displacement ◽  
3 Dimensional

This study has been doing research and development of 3-dimensional measurement method using an image processing technique for a measurement of dynamic displacement in shake table test. This measurement system is a very convenient system because it can measure the 3-D dynamic displacement in shake table test in which the several makers are only attached to the surface of an experimental structure. The system therefore is the most suitable measurement system for an evaluation of complex 3-dimensional behaviour of test model. Fundamental hardware and software for the measurement system has been constructed until now. The fundamental dynamic measurement accuracy and effectiveness of the measurement system has been also confirmed from several shake table tests. In this paper, the dynamic measurement accuracy in three measurement units on the assumption of practical use is described from the results of shake table tests in National Research Institute for Earth Science and Disaster Prevention using the collapse building and the inverted pendulum model.

Study on 3-D Measurement Method in Shake Table Tests Using Image Processing Technique: 4th Report — Evaluation of Synthetic Measurement Performance

2006 ◽  
Author(s):  
Satoshi Fujita ◽  
Osamu Furuya ◽  
Hidetaka Hayashi
Keyword(s):  
Image Processing ◽  
Measurement System ◽  
Measurement Method ◽  
Three Dimensional ◽  
Processing Technique ◽  
Shake Table Test ◽  
Image Processing Technique ◽  
Shake Table ◽  
Shake Table Tests ◽  
Dynamic Displacement

In recent years, the importance of the fracturing test using the full-scale model is recognized in order to upgrade an earthquake resistant design. It is, moreover, important to develop a new measurement method which can measure a complex three-dimensional behavior in such fracturing test. This study has been doing research and development of three-dimensional measurement method using an image processing technique for a measurement of dynamic displacement in shake table test without any contact. This measurement system is a very convenient system because it can measure the three-dimensional dynamic displacement in the simple experimental condition that the several makers are only attached to the surface of an experimental structure. The system therefore is the most suitable measurement system for an evaluation of complex three-dimensional behavior of test model. The fundamental hardware and software for the measurement system has been constructed until now. The fundamental dynamic measurement accuracy and effectiveness of the measurement system has been also confirmed from several shake table tests. This paper describes the measurement results of shake table test using historical wooden structure and actual wooden house model in the largest shake table facilities at E-Defense, and evaluates synthetic measurement performance of the developed measurement system.

Research and Development of Measurement Method for Structural Fracturing Process in Shake Table Tests Using Image Processing Technique

2004 ◽  
Vol 126 (1) ◽  
pp. 115-121 ◽  
Author(s):  
Satoshi Fujita ◽  
Osamu Furuya ◽  
Tadashi Mikoshiba
Keyword(s):  
Image Processing ◽  
Measurement Method ◽  
Three Dimensional ◽  
Processing System ◽  
Steel Structure ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Shake Table ◽  
Shake Table Tests ◽  
Fracturing Process

The largest three-dimensional shake table is now being constructed in Hyogo prefecture, Japan for a solution of fracturing process of structures, buildings, and soils. However, it seems to be difficult to measure the fracturing processes of the structures during severe earthquake by using conventional methods and equipment, because the three-dimensional measurement of larger dynamic displacement in excess of elastic region of the structure will be the key to a solution and cannot be obtained by any of the vibration pick-ups such as displacement transducers and so on. In this study, R&D of the new measurement method to clarify the fracturing process of the structures by applying a so-called motion capture technique, which has been mainly studied for modeling of human actions and motions. This paper describes the concept of the system, the outline of the proto-type image processing system developed in the study and the results of the shake table test using five-story steel-structure model to investigate the measurable accuracy of the system.

Study on 3-D Measurement Method for Structural Dynamic Displacement in Shake Table Tests Using Image Processing

2002 ◽  
Author(s):  
Satoshi Fujita ◽  
Osamu Furuya ◽  
Yasushi Niitsu ◽  
Tadashi Mikoshiba ◽  
Hiroaki Yamazaki
Keyword(s):  
Image Processing ◽  
Measurement System ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Dynamic Measurement ◽  
Shake Table ◽  
Shake Table Tests ◽  
3 Dimensional ◽  
Building Model ◽  
Real Scale

This study has been examined about a 3-dimensional measurement method suitable for a fracturing test of real scale model using shake table test, and has proposed the measurement system using image processing. Although this measurement system is based on a simple theory of measurement, it is a very convenient system which only requires to install the markers on the object structure and it can be considered as the most suitable measurement system to evaluate the complex 3-dimensional behavior of real scale structure. Fundamental hardware and software in measurement system has been constructed until now. Moreover, the fundamental dynamic measurement accuracy and effectiveness of the proposed measurement system has been confirmed from the shake table tests using the 5-storey building model in elastic region. This paper describes the dynamic measurement accuracy, the effectiveness of the proposed system and the evaluation for practical use from the results of shake table tests using the collapse building model and the wooden house model.

Applications of High-Precise Three-Dimensional Measurement System

2011 ◽  
Vol 222 ◽  
pp. 62-65 ◽  
Author(s):  
Takeshi Hashimoto ◽  
Mitsuo Kaneko ◽  
András Rövid ◽  
Hiroaki Ohta ◽  
Akira Fukuda ◽  
...  
Keyword(s):  
Global Warming ◽  
Measurement System ◽  
Measurement Accuracy ◽  
Three Dimensional ◽  
Long Distance ◽  
Accuracy Measurement ◽  
Close Relationship ◽  
Three Dimensional Measurement ◽  
High Accuracy Measurement ◽  
Moving Speed

To reveal the influence of global warming on glaciers, highly accurate observations of glacier movement must continue every year. It is thought that there is a close relationship between glacier moving speed and global warming. Thus, there have been precise, detailed observations of the movement of the Perito Moreno glacier in Patagonia of the Argentine Republic over the past five years. The measurement method of using GPS and an optical measuring instrument is generally used to monitor glacier movement, but the measurement accuracy attained is not optimal because of the huge size of the glacier. The measurement system used for the Perito Moreno observations, however, could realize high accuracy measurement over long distance. The measurement system is based on the principle of stereo measurement using cameras. This paper describes the results of the Perito Moreno glacier observations of this year and considers the effectiveness of glacier observation using cameras.

Three-Dimensional Measurement System Based on Line Laser

2013 ◽  
Vol 333-335 ◽  
pp. 32-36
Author(s):  
Le Wen Yu ◽  
Da Zhang ◽  
Yuan Sheng Zhang
Keyword(s):  
Mathematical Model ◽  
Measurement System ◽  
Measurement Accuracy ◽  
Three Dimensional ◽  
Measurement Range ◽  
Laser Triangulation ◽  
Depth Information ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement ◽  
On Line

This paper puts forward a three-dimensional measurement system based on line laser, describing its operating principle. Extracted the light stripes center by image processing technology, and establishing mathematical model, detecting the depth information by the method of laser triangulation, and reconstructed the three-dimensional form of object. The experimental results indicate that measurement accuracy less than ±0.03mm when the measurement range between 0mm to 10mm.

scholarly journals An automated length measurement system for tilapia fish based on image processing technique

2021 ◽  
Vol 1088 (1) ◽  
pp. 012049
Author(s):  
Nor Salwa Damanhuri ◽  
Mohammad Faiz Mohammad Zamri ◽  
Nor Azlan Othman ◽  
Sarah Addyani Shamsuddin ◽  
Belinda Chong Chiew Meng ◽  
...  
Keyword(s):  
Image Processing ◽  
Measurement System ◽  
Processing Technique ◽  
Length Measurement ◽  
Image Processing Technique
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