Robot Work System Velocity Synchronization via Visual Mark Detection
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Solution Overview
Problem
Existing robot systems that perform work on objects conveyed by a moving platform lack efficient methods to accurately calculate and synchronize with the conveying velocity, leading to potential breakage and inefficiencies in production lines.
Innovation Solution
A work system that includes a moving platform with a visual sensor to detect and process visual information of objects or marks, a calculating portion to determine the conveying velocity, and a drive control unit to drive the work portion using this velocity, ensuring precise synchronization and reduced impact during object handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a robot performs work on objects conveyed by a moving platform without accurate conveying velocity calculation, then the robot can operate, but object breakage increases and work precision deteriorates
Solution Approach 1:
The system uses a visual sensor to detect mark positions on the conveying apparatus, calculates conveying velocity based on these positions, and feeds this velocity information back to the drive control unit to adjust robot operations. This closed-loop feedback mechanism ensures accurate synchronization between robot work and object conveyance, preventing breakage while maintaining work stability
Solution Approach 2:
The patent replaces mechanical velocity sensing methods with a visual sensing system. Instead of using mechanical encoders or tachometers on the conveying apparatus, the system uses a camera to capture images of marks, processes these images to detect mark positions, and calculates velocity from these positional measurements. This substitution eliminates mechanical complexity and improves measurement accuracy
2Adaptability or versatility
If the visual sensor is secured to the moving platform to maintain fixed positional relationship with work portion, then work area coverage is improved, but the system complexity increases
Solution Approach 1:
The patent merges the visual sensor, mark detection function, velocity calculation function, and robot control function into an integrated system. The visual sensor is secured to the moving platform along with the robot, creating a unified mobile work unit. This merging eliminates the need for separate stationary sensing and control systems, reducing overall system complexity while improving work area adaptability
3Measurement precision
If the conveying velocity is calculated based on mark positions detected by visual sensor, then conveying velocity measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical velocity measurement devices with a visual sensing and calculation system. Instead of using tachometers, encoders, or other mechanical sensors on the conveying apparatus, the system uses a camera to capture images of marks, processes these images to detect mark positions, and calculates velocity from the positional changes over time. This substitution reduces device complexity while improving measurement precision
Solution Approach 2:
The patent introduces marks as intermediary objects on the conveying apparatus. These marks serve as reference points that the visual sensor can detect. By placing known-position marks on the moving conveying apparatus and tracking their positions, the system can calculate conveying velocity without directly measuring the motion of the apparatus itself, simplifying the measurement process
Data Source
AI summary
Provided is a work system including: a conveying apparatus that conveys an object; a moving platform that can be moved; a work portion that is secured to the moving platform and that performs work on the object being conveyed by the conveying apparatus; a visual sensor that is secured to the moving platform and that successively acquires visual information about the object being conveyed by the conveying apparatus or a mark formed on the conveying apparatus; a detecting portion that successively detects at least positions of the object or the mark by processing the visual information acquired by the visual sensor; a calculating portion that calculates a conveying velocity of the conveying apparatus on the basis of the positions of the object or the mark successively detected by the detecting portion; and a drive control unit that drives the work portion by using the conveying velocity.