Robot Base Position Correction Using Stored Stop Deviation
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Solution Overview
Problem
Existing automated guided vehicles face challenges in making precise adjustments at target positions, often requiring detours or returning to the starting point due to limitations in accurate movement mechanisms.
Innovation Solution
A robot system with a base, robot arm, movement mechanism, input unit, control unit, detection unit, and memory unit that allows for precise positioning by detecting differences between the stop position and target position, and adjusting the set target position based on stored information to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the automated guided vehicle uses a conventional movement mechanism to reach the target position, then the vehicle can move to the target position, but the vehicle cannot make fine adjustment of the position after arriving at the target position
Solution Approach 1:
The patent divides the movement process into two distinct phases: a rough movement phase using the conventional movement mechanism to reach the vicinity of the target position, and a fine adjustment phase using a separate fine adjustment mechanism to achieve precise positioning. This segmentation allows each mechanism to be optimized for its specific function without requiring the entire system to be overly complex.
Solution Approach 2:
The patent introduces a fine adjustment mechanism that can be dynamically activated after the vehicle reaches the target position. This dynamic approach allows the system to switch from the primary movement mechanism to the fine adjustment mechanism only when needed, maintaining simplicity for most operations while enabling high precision when required.
2Measurement precision
If the automated guided vehicle takes a detour to make fine adjustment of the position, then the vehicle can achieve better positioning accuracy, but the movement time increases
Solution Approach 1:
The patent equips the vehicle with a fine adjustment mechanism that is prepared in advance and can be immediately activated upon reaching the target position. This preliminary preparation eliminates the need for time-consuming detours, as the fine adjustment capability is already integrated and ready to use, allowing immediate correction of positioning errors.
Solution Approach 2:
The fine adjustment mechanism acts as an intermediary between the conventional movement mechanism and the target position. Instead of requiring the main movement mechanism to perform complex detour maneuvers, the fine adjustment mechanism serves as a mediator that handles small-scale positioning corrections efficiently and directly.
3Measurement precision
If the automated guided vehicle returns to the start point to move again for accurate positioning, then the vehicle can achieve better positioning accuracy, but the productivity decreases
Solution Approach 1:
The patent enables the vehicle to perform self-correction of positioning errors through the integrated fine adjustment mechanism. Instead of requiring the vehicle to return to the start point and repeat the entire movement process, the system allows the vehicle to autonomously make precise adjustments at the destination, significantly improving work efficiency while maintaining high positioning accuracy.
Solution Approach 2:
The patent implements a feedback mechanism where the vehicle detects its actual position at the target position and uses this information to activate the fine adjustment mechanism for correction. This closed-loop feedback approach allows the vehicle to achieve accurate positioning in a single trip rather than requiring multiple attempts, thereby maintaining high productivity.
Data Source
AI summary
A robot system includes a base, a robot arm coupled to the base, a movement mechanism that moves the base, an input unit to which a target position of the base is input, a control unit that controls actuation of the movement mechanism based on the target position input to the input unit, a detection unit that detects a difference between a stop position of the base after the movement of the base by the movement mechanism is completed and the target position, and a memory unit that stores information on the difference detected by the detection unit. When the base is moved, the control unit sets a set target position where the base should stop according to the information already stored in the memory unit.