Lee, SN You, BJ Lim, MS Oh, SR Han, SS Lee, SH 2024-01-19T15:38:37Z 2024-01-19T15:38:37Z 2022-03-07 2002 https://pubs.kist.re.kr/handle/201004/117631 When a construction company builds a high structure, many piles should be driven into the ground by a hammer whose weight is 7,000 Kg in order to make the ground under the structure safe and strong. So, it is essential to determine whether a pile is penetrated into the ground enough to support the weight of the structure since ground characteristics at different locations are different each other. This paper proposes a visual measurement system for pile rebound and penetration movement including vibration using a high-speed line-scan camera and a specially designed mark to recognize two-dimensional motion parameters of the mark using only a line-scan camera. A mark stacking white and black right-angled triangles is used for the measurement, and movement information for vertical distance, horizontal distance and rotational angle is determined simultaneously. Especially, by adopting a line-scan CCD camera whose line rate is 20 KHz, the measurement performance of dynamic characteristics of the pile at impact instant is improved dramatically. English IEEE Visual measurement of pile penetration and rebound movement using a high-speed line-scan camera Conference 1 19th IEEE International Conference on Robotics and Automation (ICRA), pp.4307 - 4312 19th IEEE International Conference on Robotics and Automation (ICRA) 4307 4312 US WASHINGTON, DC 2002-05-11 2002 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION, VOLS I-IV, PROCEEDINGS 000178573200682 2-s2.0-0036058499 Proceedings Paper