Robot Arm Axis Calibration Using Integrated Signal Detection
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Solution Overview
Problem
Conventional methods for calibrating robot arms require dedicated tools, leading to potential errors from mounting and removing these tools and involving complex manual procedures.
Innovation Solution
A method that uses a sensor-equipped robot arm to detect changes in signal strength caused by a reference mark, allowing for automatic determination of the original point of the axis without the need for dedicated calibration tools, using either discrete or continuous signal patterns to identify the center or extremity of signal fluctuations as the typical position for calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated calibrating tools are used for robot arm calibration, then calibration accuracy can be improved, but the complexity of the calibration process increases due to mounting and removing tools
Solution Approach 1:
The patent extracts the calibration function from dedicated external tools and integrates it into the robot arm itself through sensors and reference marks. The robot arm's own components are used for calibration, eliminating the need for separate calibration tools and their associated mounting/removal procedures.
Solution Approach 2:
The robot arm is given dual functionality: it performs both operational tasks and self-calibration. The sensors and reference marks equipped on the robot arm enable it to serve as both the work tool and the calibration instrument, reducing process complexity.
2Reliability
If dedicated calibrating tools are mounted on the robot arm, then calibration can be performed, but potential errors are introduced from mounting and removing these tools
Solution Approach 1:
The robot arm performs calibration on itself using integrated sensors and reference marks. This self-service approach eliminates the need for external tools that would require mounting and removal, thereby eliminating the source of mounting errors and improving calibration reliability.
3Measurement precision
If manual calibration procedures are used, then calibration can be performed, but the time required for calibration increases
Solution Approach 1:
The patent implements automatic feedback-based calibration where sensors continuously monitor the position of reference marks and automatically adjust calibration parameters. This closed-loop feedback system maintains calibration precision while eliminating manual intervention, significantly reducing calibration time.
Solution Approach 2:
Manual mechanical calibration procedures are replaced with an automatic sensor-based system. The sensors and automated control system substitute for manual operations, maintaining precision while reducing the time required for calibration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy and effective calibration of robot arms without dedicated tools, reducing errors and allowing for automatic calibration processes, thus improving the convenience and accuracy of the calibration procedure.
Implementation Method 1
receiving, during a movement of the robot arm in an axis of the robot arm, a signal collected by a sensor equipped at a frame of the robot arm; detecting a change in strength of the received signal, the change being caused by an offset between a position of a reference mark equipped at the robot arm and a position of the sensor
Data Source
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AI summary
A method for managing a robot arm (150) is provided. In the method, during a movement of the robot arm in an axis (130, 140) of the robot arm, a signal collected by a sensor (310) equipped at a frame (312) of the robot arm is received. A change in strength of the received signal (330, 360) is detected, where the change is caused by an offset between a position of a reference mark (320) equipped at the robot arm and a position of the sensor. An original point of the axis of the robot arm is determined based on the detected change. Further, an apparatus for managing the robot arm, a system for managing a robot arm, a computer readable medium, a robot system and a robot managing system are provided. The original point of the axis of the robot arm may be determined in a much easy and effective way without a dedicated calibrating tool, and then the robot arm may be calibrated based on the original point accurately.