Trajectory Display for Position Error Visualization
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Solution Overview
Problem
Existing display methods for motion programs fail to clearly depict errors between commanded and actual positions of control targets, making it difficult for users to accurately adjust programs and recognize error occurrence status.
Innovation Solution
A display device and method that acquires command and response positions, calculates position differences, and displays spatial trajectories with error thresholds, allowing users to easily recognize and adjust for errors by overlapping and enlarging relevant sections of the trajectories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the error component is enlarged at a large magnification to display the actual path, then the error visibility is improved, but the correspondence relationship between command position and actually measured position becomes difficult to recognize
Solution Approach 1:
The patent segments the trajectory display into multiple sections: the overall trajectory at normal magnification and enlarged portions at large magnification. This segmentation allows the error component to be viewed in detail while maintaining the ability to see the overall correspondence relationship between command position and actual position.
Solution Approach 2:
The patent adds a temporal dimension to the display by showing multiple frames or time points. The enlarged portion is displayed at a different time point or frame than the overall trajectory, allowing both views to coexist without overlapping confusion. This dimensional separation resolves the contradiction between detailed error viewing and overall correspondence recognition.
2Measurement precision
If the actual path is displayed overlapping the ideal path, then the error comparison is improved, but the display becomes difficult to understand when command position and actual position are distant
Solution Approach 1:
The patent divides the display into segmented portions: overall trajectory display and enlarged error portion display. By segmenting the visualization, the system maintains both the big-picture understandability and the detailed error comparison capability, avoiding the confusion that arises from displaying distant positions on a single scale.
Solution Approach 2:
The patent applies different display qualities to different parts of the trajectory. The overall trajectory is displayed at normal magnification for general understanding, while specific error-prone portions are displayed at enlarged magnification with enhanced visual properties. This local quality differentiation allows each portion to be displayed in the most appropriate manner for its specific needs.
Data Source
AI summary
A display device that displays an error between an instructed command position of a specific portion of a control target and a response position of the specific portion in a manner easily understandable to a user is described. The display device acquires a response position of the specific portion and calculates a difference in position of the command position and the response position. The display device displays a spatial trajectory based on the command position or a spatial trajectory based on the response position. The display device also displays each spatial trajectory in a mode where a portion of the spatial trajectory of the command position corresponding to the selected mark and a portion of the spatial trajectory of the response position corresponding to the relevant portion of the spatial trajectory of the command position are enlarged at a same magnification.