Robot State Monitoring with Time-Synced I/O Signal Correlation
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Solution Overview
Problem
Existing robot monitoring systems fail to clarify the correlation between the operating state of a robot and the states of its input and output signals.
Innovation Solution
A state monitoring apparatus that captures images of an industrial machine, associates the video data with input/output signals along a time axis, and plays the video to show changes in both states, allowing for simultaneous observation and correlation clarification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If video data of the robot is recorded and displayed separately from controller signals, then the robot's motion can be monitored, but the correlation between robot operating state and input/output signal states cannot be clarified
Solution Approach 1:
The patent combines video data from the imaging device with input/output signal data from the robot controller into a single integrated display. The video playback unit simultaneously shows robot motion images and the corresponding signal states (input signals DI1-DI4 and output signals DO1-DO4) on the same timeline, allowing operators to directly observe correlations between mechanical movements and electrical signals without needing separate monitoring systems.
2Loss of time
If separate monitoring systems are used for robot motion and controller signals, then each can be monitored independently, but the time-synchronized correlation between them cannot be easily clarified
Solution Approach 1:
The patent adds a temporal dimension to the monitoring display by synchronizing video playback with signal state display along a common time axis. The display shows video frames, input signals, and output signals all aligned to the same timestamp, enabling operators to analyze time-correlated events (such as which signal changes correspond to specific robot movements) without complex post-processing or separate timing instruments.
Data Source
AI summary
A robot state monitoring device 2 comprises: a camera which captures an image of a robot 3 under the control of a controller; a moving image generation unit which associates video data of the robot 3 acquired by the camera with input/output signals DO[1], AO[1], DI[1], and AI[1] of the controller along a time axis 830, and generates a moving image showing a state change of the robot 3 and the input/output signals DO[1], AO[1], DI[1], and AI[1]; and a moving image playback device which plays back the moving image generated by the moving image generation unitThe moving image generation unit acquires the values of the input/output signals DO[1], AO[1], DI[1], and AI[1] at the recording time of each frame under the same cycle as the frame rate of the video data.