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Human robot collaboration - using kinect v2 for ISO/TS 15066 speed and separation monitoring
Citation key rosenstrauch-2018-cats
Author Martin Jörg Rosenstrauch and Tessa Johanna Pannen and Jörg Krüger
Pages 183–186
Year 2018
ISSN 2212-8271
DOI 10.1016/j.procir.2018.01.026
Journal Procedia CIRP
Volume 76
Note 7th CIRP Conference on Assembly Technologies and Systems (CATS 2018)
Abstract The use of industrial robots within assembly workstations where human and robot should be able to collaborate or even cooperate involve high safety requirements. One out of four possibilities outlined in the current technical specification ISO/TS 15066 for ensuring safety is speed and separation monitoring. Here the robot motion speed in- or decreases dynamically depending on the distance between operator and robot. This paper introduces an approach of a speed and separation monitoring system with the help of a time of flight sensing. After introducing this safety ensuring method, a Microsoft Kinect V2 is used to continuously detect human worker within a shared workspace. With the help of the robots joint angles from the robot control it is possible to compute the distances between all robot joints and the human worker. The shortest distance, which is at the same the critical distance time, is determined and as a consequence the velocity and acceleration values of the robot were set to safe values according to ISO/TS 15066. As it is not necessary to visually detect also the robot, but only human workers, this approach is very resilient. Afterwards the introduced setup is tested by a real detected human in front of a Kinect and a simulated industrial robot (Universal Robot UR5) in the robot operating system ROS. Measurements show that depending on the position of the worker the robots speed adapts to recommended safety values up to a complete halt if necessary. Conclusively all results are discussed and an outlook for possible fields of applications is given.
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