Robotic Arm Teaching Control With Threshold-Based Mode Switching
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Solution Overview
Problem
Existing robotic arm teaching methods require frequent shifting of the operator's line of sight between the robotic arm and the teaching device, leading to decreased efficiency and accuracy, particularly in fine-tuning operations.
Innovation Solution
A control method for robotic arms utilizing a detection circuit, comparing circuit, and switching circuit to automatically switch between discontinuous and continuous motion modes based on threshold comparisons of detected signals, such as force, displacement, or speed, allowing operators to teach the arm without constant visual attention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation of teaching device with multiple buttons is used, then the robotic arm can be controlled to move in X/Y/Z directions, but the operator's line of sight must frequently shift between the robotic arm and teaching device, deteriorating teaching efficiency
Solution Approach 1:
The patent replaces manual button operations with force sensor-based intuitive manipulation. The teaching device detects forces applied to the robotic arm through force sensors, automatically converting physical manipulation into control commands without requiring the operator to manually operate multiple buttons or switch between view modes.
2Ease of operation
If force sensors on 6 axes are used for intuitive teaching, then manual dragging becomes more intuitive, but fine-tuning precision (such as 1 mm pitch) cannot be achieved as manual dragging may easily overdo and cannot be precisely positioned
Solution Approach 1:
The patent implements a feedback mechanism where force sensors continuously detect the operator's manipulation forces, and the system provides real-time feedback by controlling the robotic arm's movement in response to detected forces. This closed-loop control enables both intuitive operation and precise positioning by automatically adjusting movement based on the applied force magnitude.
3Adaptability or versatility
If teaching device provides more operation settings, then more control functions are available, but the operation becomes complicated and the teaching device becomes heavy
Solution Approach 1:
The teaching device automatically detects the operator's intended movements through force sensors and autonomously determines the appropriate control commands without requiring manual selection of operation modes or settings. The system serves itself by converting physical manipulation directly into executed movements, eliminating the need for complex interfaces, multiple buttons, or mode switching.
Data Source
AI summary
A control method of a robotic arm is provided. The control method includes: setting a detection circuit, a comparing circuit and a switching circuit. The detection circuit detects the motion of the robotic arm to generate a detection signal. The comparing circuit compares the detection signal with a low threshold region and compares the detection signal with a high threshold region to generate a comparison signal. The switching circuit switches the robotic arm to a first motion mode or a second motion mode according to the comparison signal.