Study on Rice Transplanter Experiment Based on Virtual Reality

2013 ◽  
Vol 336-338 ◽  
pp. 1356-1360
Author(s):  
Yong Xian Yue ◽  
Zhong Xiang Zhu ◽  
Rui Juan Chi
Keyword(s):  
Virtual Reality ◽  
Collision Detection ◽  
Process Simulation ◽  
Virtual Reality Environment ◽  
Working Process ◽  
Virtual Testing ◽  
Motion Equations

Similar to other machinery products, numerous analysis and tests would consume large amount of manpower and resources before paddy machinery putting into the mass markets. A method to establish the Virtual Proving Ground (VPG) for paddy machinery is proposed. Parameters stored with model nodes are obtained by collision detection between machine and scene. Motion equations of transplanting mechanism are derived with some simple transformations referring to a rice transplanter. Then working process simulation of the rice transplanter in virtual reality environment is realized by calling functions encapsulated in Vega Prime in a VC++ environment. Moreover some solutions for researching virtual testing are proposed.

Understanding industrial robot programming by aid of a virtual reality environment

2018 ◽  
Vol 47 (2) ◽  
pp. 135-155 ◽  
Author(s):  
Evgenia Manou ◽  
George-Christopher Vosniakos ◽  
Elias Matsas
Keyword(s):  
Virtual Reality ◽  
Collision Detection ◽  
Inverse Kinematics ◽  
Industrial Robot ◽  
Robotic Arm ◽  
Industrial Equipment ◽  
Virtual Reality Environment ◽  
Pick And Place ◽  
Detection Capabilities ◽  
Structured Questionnaire

This paper reports on the construction of a virtual environment on top of a commercially available authoring platform that simulates an industrial robotic arm in pick-and-place movement scenarios. The user interface constructed follows in functionality the well-known teach pendants but exploits just a normal PC keyboard. However, both forward and inverse kinematics is served allowing the user to command movements in either the joint or the tool coordinate system. Perception pertaining to picking and placing movements and in particular the subtle docking positions was enhanced by adding so-called perceptual aids consisting of auxiliary objects with collision detection capabilities. The application was put to test by a group of practitioner-trainees who reported favourably, using a structured questionnaire, on its merits in enhancing their understanding of the robot’s capabilities, its kinematics, as well as the task performance strategy. Thus, confidence is increased regarding the ability of Virtual Reality – based platforms to contribute to successful training regarding programming and manipulation of industrial equipment.

Top-Down Processing and Visual Reorientation Illusions in a Virtual Reality Environment

2004 ◽  
Vol 63 (3) ◽  
pp. 143-149 ◽  
Author(s):  
Fred W. Mast ◽  
Charles M. Oman
Keyword(s):  
Virtual Reality ◽  
Visual Processing ◽  
Line Length ◽  
Perceptual Cues ◽  
Virtual Reality Environment ◽  
Top Down ◽  
Test Conditions ◽  
The Subject ◽  
Processing Mechanisms

The role of top-down processing on the horizontal-vertical line length illusion was examined by means of an ambiguous room with dual visual verticals. In one of the test conditions, the subjects were cued to one of the two verticals and were instructed to cognitively reassign the apparent vertical to the cued orientation. When they have mentally adjusted their perception, two lines in a plus sign configuration appeared and the subjects had to evaluate which line was longer. The results showed that the line length appeared longer when it was aligned with the direction of the vertical currently perceived by the subject. This study provides a demonstration that top-down processing influences lower level visual processing mechanisms. In another test condition, the subjects had all perceptual cues available and the influence was even stronger.

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