Tsubasa Imaizumi, N. Koizumi, Ryosuke Kondo, Yu Nishiyama, Naoki Matsumoto
{"title":"Automatic fascia extraction and classification for measurement of muscle layer thickness","authors":"Tsubasa Imaizumi, N. Koizumi, Ryosuke Kondo, Yu Nishiyama, Naoki Matsumoto","doi":"10.1109/URAI.2018.8441877","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441877","url":null,"abstract":"In this report, we proposed a method of discriminating of fascia using Histograms of Oriented Gradients (HOG) and Support Vector Machine (SVM) in ultrasound images. In modern society, aging is progressing due to medical development. Along with that, the decline of muscle due to aging is regarded as a serious problem. To cope with this problem, we proposed a method of automatic fascia classification to visualize muscle thickness. Our method use SVM based on the texture of ultrasound images. In addition to this method, our method achieves about 90% Accuracy and Recall by considering that the fascia is a continuous tissue. Experimental results show the effectiveness of our proposed automatic fascia extraction method.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134080306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Force Sensor-less Compliant Control of Robot Based on Position-loon","authors":"Deli Zhang, Jimin Lu, Yubao Chen","doi":"10.1109/URAI.2018.8441866","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441866","url":null,"abstract":"Force control is needed in many robot operations. Force sensor can be used to precisely and rapidly estimate interaction forces, but may be expensive and affect the system's stiffness. Additional, there are robot resistances caused by friction and gravity making negative effects. A common approach is to establish a model and compensate and/or suppress the resistance in the motor input torque, but it may be not accessible to researchers due to the closure of motor drivers. A force sensor-less compliant control method for robot is proposed in this paper. Without force sensor, the external torques caused by force acting on the robot arm, is estimated through motor current. The resistance is addressed as part of the external torque, and then converted together into movement according to robot dynamic. A dither signal is also added to the position-loop to suppress the static friction at start-up. The control scheme is applied to flexible joint control and drag teaching control, which are simulated in MATLAB and experimentally validated on a mon-axial robot.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134123093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ji-Chul Kim, S. Yoo, Mingeuk Kim, Yeong-Jae Kim, Guen-Ho Lee
{"title":"Safety Control of Automatic Excavator for Swing Collision Avoidance","authors":"Ji-Chul Kim, S. Yoo, Mingeuk Kim, Yeong-Jae Kim, Guen-Ho Lee","doi":"10.1109/URAI.2018.8441774","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441774","url":null,"abstract":"The importance of safety for automated construction machinery is continuously increasing. Especially, excavators are frequently exposed to fatal accident because it works closely with human workers. Distance - based safety technique lacks the analysis of the braking ability of the excavator's hydraulic system and the dynamic motion of the object. In this study, we propose a collision avoidance safety algorithm to secure a consistent and reliable safe distance. By calculating relative velocity and rotational inertia in real-time, the proposed controller determines the exact braking time of swing motion. For this purpose, the object motion was tracked using a laser scanner sensor and the rotational inertia was calculated by inclinometer posture sensor. We carried out the experiment on the actual vehicle to evaluate the safety margin when stop control completed. The result shows a reliable performance of safety distance which satisfied desired margin with ± 0.25m error. It is expected that the proposed safety control technology can be extended to other equipment in various construction site.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116059055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fangli Mou, Shuang Wu, Xuan Xiao, Zhang Tao, O. Ma
{"title":"Control of a Space Manipulator Capturing a Rotating Object in the Three-dimensional Space","authors":"Fangli Mou, Shuang Wu, Xuan Xiao, Zhang Tao, O. Ma","doi":"10.1109/URAI.2018.8441888","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441888","url":null,"abstract":"For space robots accomplishing the overwhelming majority of on-orbit servicing(OOS) missions, capture of a target object is the primary task. Capture of a rotating object in orbit is an especially important and challenging task for OOS such as orbital debris removal. This paper studies the control strategy for capturing a fast rotating object by a space manipulator from a floating spacecraft in the three-dimensional space. First, in order to simulate the real contact condition as much as possible, a contact dynamics model considering the effect of the contact geometry of the capture interfaces is built. Second, the control strategy is proposed by a combination of a resolved motion rate control method and hybrid impedance control technique. The stability is proved by Lyapunov theorem. Finally, a simulation example of a 7-joint manipulator capturing a rotating target object in the unrestricted three-dimensional space is conducted to verify the feasibility and efficiency of the control strategy. In the effect of the control law, relative velocity at the contact spots is reduced, and thus the target object at an initial rotation speed of 12 deg/s (2 rpm) is captured successfully.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125478479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Ahmed, Dae Hwan Kim, Yongwon Hwang, Sung-Jun Park
{"title":"Treatment of Alzheimer's, Cognitive, Chronic Pain Rehabilitation, Depression and Anxiety disorders in One System for Elderly Using VR","authors":"B. Ahmed, Dae Hwan Kim, Yongwon Hwang, Sung-Jun Park","doi":"10.1109/URAI.2018.8441897","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441897","url":null,"abstract":"There is straightforwardly relation between the elderly developing populace and mental disorders all through the world particularly by those effected by Alzheimer's disease, cognitive issues, depression and anxiety and in addition chronic pain and it's turned into a test for medicinal services and social help administrations is also a serious concern for the medical practitioners. On the other hand, taking care of that demand for the serious game industry can essentially profit by the organization of creative, computer-based applications fit for tending to need, especially in the zone of psychological disorders and its recovery. In that specific situation, we have planned to help the restorative faculty, health care specialist and different guardian in enhancing the nature of every life activities people with psychological disorders and we present one 3D game using virtual reality VR tool. In this paper, the authors will talk about the practical idea of serious games for elderly patients. The main task of our study is to merge all other studies previously done and implemented in the form of various games, to bring them under one umbrella. The factors used to gain the retention of elderly in the game play for longtime training are discussed. In addition, efficient productive design criteria and formative methodologies will be discussed by which we made a game using VR tool.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127721588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Foreground Extraction Algorithm for Monocotyledonous Plants based on CNN and CRF","authors":"Sang-Wook Lee, Jun-Sik Kim","doi":"10.1109/URAI.2018.8441803","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441803","url":null,"abstract":"We aim at developing a foreground extraction method for automatic leaf identification in a monocotyledon image. In order to identify accurately all leaves in a two-dimensional plant image, it is critical to extract an exact plant region because accidental holes or breaks in the extracted foreground image may lead to wrong structural results in subsequent analysis steps. However, because monocotyledonous plants such as rice, wheat, and barley have many thin leaves and complex morphology, it is highly possible that their plant images have a lot of holes by self-occlusion between the leaves or by color change and image blurring. In addition, plant images usually have extremely thin regions caused by its thin shape. We propose a foreground extraction algorithm based on a fully convolutional neural network (CNN) and a dense conditional random field (CRF) to retain holes and breaks made by morphological characteristics of monocotyledonous plants and to eliminate the accidental holes and breaks. In our algorithm, a CNN plays a role in labeling pixels as foreground or not and a CRF strengthens connection between foreground pixels. By synergistic integration of both models, our proposed algorithm achieve a better foreground extraction accuracy for plant images. Experiments show that our proposed method effectively extracts foreground regions from a single 2-dimensional monocotyledonous plant image and is fast enough for high-throughput phenotyping.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127610405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of a Performance Test Platform of Direct-Drive Servo Valve Linear Force Motor","authors":"Hua-Chao Guo, Yuefeng Li, Xiang Zhang","doi":"10.1109/URAI.2018.8441779","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441779","url":null,"abstract":"In order to test the performance of liner force motor accurately, reliably as well as conveniently, with function as key element in direct-drive servo system, the platform for their characteristics test was developed, according to their structural features and performance characteristics with combination of sensor technology. Automatic and precise test for the profermance of liner force motor was realized. Practical test and analysis results of a specific liner force motor inidicate that, the system is convenient and safe to operate, and has advantages of stable as well as reliable test rasults. Accordingly, it can be suitable for the characteristics test of common linear motor.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122928010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A FastSLAM Based on the Smooth Variable Structure Filter for UAVs","authors":"Yang Liu, Congqing Wang","doi":"10.1109/URAI.2018.8441876","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441876","url":null,"abstract":"Three-dimensional (3-D) simultaneous localization and mapping (SLAM) is an effective technique of autonomous navigation for the Unmanned Aerial Vehicles (UAVs), in which the UAV can estimate the vehicle's pose and build a map in GPS-denied environments simultaneously. FastSLAM algorithm can solve the quadratic computational complexity and single-hypothesis data association problem of the classical EKF-SLAM algorithm, in which the SLAM problem can be factored into a product of a UAV's path posterior estimated by the particle filter (PF) and independent landmark posteriors estimated by the extended Kalman filter (EKF). But the FastSLAM algorithm suffers from lower map accuracy introduced by ignoring correlation information of landmarks. A SVSF-FastSLAM algorithm for UAVs is presented, in which the SVSF is adopted to estimate the landmarks' position. The simulation results are given to show the effectiveness of the proposed algorithm. Compared with the conventional FastSLAM algorithm, the SVSF-FastSLAM algorithm shows that a more accurate estimation of trajectory and environment can be achieved.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123224882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Circular Path Based Trajectory Blending Algorithm Considering Time Synchronization of Position and Orientation Trajectories","authors":"Ho-Sang Kwon, Kuk‐Hyun Ahn, Jae-Bok Song","doi":"10.1109/URAI.2018.8441777","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441777","url":null,"abstract":"It is important to generate an appropriate traj ectory in task space in the traj ectory planning of industrial robots. Many industrial robots blend linear and circular traj ectories in their traj ectory generation with several advantages. However, it does not provide a detailed method for the smooth motion of position and orientation of the blending traj ectory. This study proposes a circular path based traj ectory blending algorithm considering time synchronization of position and orientation of the blending traj ectory. This algorithm can generate a more smooth and natural motion by matching the duration time of position and orientation of the blending trajectory using a simple geometric shape based equations. The proposed algorithm was evaluated using a 7 DOF industrial manipulator. The experimental results show that the proposed algorithm can operate stably for various cases.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115219247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seongjae Jeong, Byung-Gak Kim, Sumin Park, Eugene Park, Alexander Spinos, Devin Carroll, Thulani Tsabedze, Yulai Weng, Taewon Seo, Mark H. Yim, F. Park, Jongwon Kim
{"title":"Variable Topology Truss: Hardware Overview, Reconfiguration Planning and Locomotion","authors":"Seongjae Jeong, Byung-Gak Kim, Sumin Park, Eugene Park, Alexander Spinos, Devin Carroll, Thulani Tsabedze, Yulai Weng, Taewon Seo, Mark H. Yim, F. Park, Jongwon Kim","doi":"10.1109/URAI.2018.8441880","DOIUrl":"https://doi.org/10.1109/URAI.2018.8441880","url":null,"abstract":"The variable topology truss (VTT) system is a new type of modular platform that enables control over both the shape and topology of a truss, bringing both the efficiency of variable geometry trusses and the flexibility of self-reconfigurable robots. A VTT has the capability to enter a disaster site and shore damaged structures to assist with rescue work. This paper presents a revised overview of the VTT hardware design, enhanced from our previous works. We propose an active VTT spherical joint, which can address the hardware-related issues and also simplify the VTT software. Additionally, reconfiguration and locomotion planning algorithms for VTT are presented. We propose a retraction-based RRT method especially suitable for VTT and show our algorithm is superior to basic RRT in a practical 21-member VTT scenario. The locomotion algorithm implements a rolling gait under kinematic constraints; simulation results for a 21-member VTT show our algorithm yields accurate trajectory tracking.","PeriodicalId":347727,"journal":{"name":"2018 15th International Conference on Ubiquitous Robots (UR)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115525160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}