Robot Teaching Point Validation for Abrupt Motion Detection

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Solution Overview

Problem

Existing robot operation systems lack an efficient method to determine whether the traveling distances and angle changes between teaching points in a robot operation program exceed the allowable limits, potentially leading to abrupt movements or singular points during robot operation.

Innovation Solution

A robot operation determination device that calculates the traveling distances and angle changes between adjacent teaching points in a robot operation program and compares them to allowable limits, displaying any exceedances to the operator.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If teaching positions are set frequently in the operation program, then the robot operation becomes more precise and controllable, but the traveling amount between teaching points increases and may exceed allowable limits causing abrupt movements

Engineering Contradiction:
Improverobot operation precisionVSAvoidabrupt movement
Core Design Contradiction:
Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary calculation of traveling amounts between teaching points before actual robot execution. By calculating the distance and angle changes in advance and comparing them against allowable limits, the system identifies problematic teaching point combinations before they cause abrupt movements, allowing preventive correction of the operation program

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system provides feedback by displaying information about teaching points that exceed allowable traveling amounts. This feedback mechanism allows operators to review and adjust the operation program to eliminate abrupt movements while maintaining necessary operational precision

Inventive Principle:
Principle #23Feedback

2Productivity

If the number of teaching points is reduced, then the operation program becomes simpler and faster to execute, but the robot may pass through singular points or unreachable positions

Engineering Contradiction:
Improveoperation speedVSAvoidrobot operation safety
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The system performs preliminary simulation and calculation to check whether reduced teaching point configurations would cause the robot to pass through singular points or unreachable positions. By validating the operation program before execution, the system ensures that fewer teaching points do not compromise operational safety

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system provides feedback information about potential singular points and unreachable positions when teaching points are reduced. This allows operators to make informed decisions about optimizing the operation program while maintaining safety constraints

Inventive Principle:
Principle #23Feedback

3Manufacturing precision

If teaching positions are set with small intervals, then the robot operation becomes smoother and more accurate, but the total traveling amount increases and operation time extends

Engineering Contradiction:
Improvepositioning accuracyVSAvoidoperation time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The system calculates and compares traveling amounts against allowable limits to determine optimal teaching point spacing. By analyzing the relationship between interval size, traveling amount, and operation time, the system helps identify the optimal parameter configuration that balances positioning accuracy with operational efficiency

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS20250128413A1Robot operation determination device, operation determination method, and operation determination program
Publication Date: 2025.04.24 FANUC LTD
  • US20250128413A1 patent drawing
  • US20250128413A1 patent drawing
  • US20250128413A1 patent drawing

AI summary

This robot operation determination device includes: an input unit for inputting position information of at least two teaching points of an operation program for operating a robot; a storage unit that stores an allowable movement amount; a calculation unit that calculates a movement amount between adjacent teaching points in the operation program on the basis of the position information input into the input unit; a determination unit that determines whether the movement amount calculated by the calculation unit is larger than the allowable movement amount stored in the storage unit; and a display unit that, when the determination unit determines that the movement amount is larger than the allowable movement amount, performs a display to that effect.