Robot Stop-Signal Logic for Reliable Motor Power Interruption
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Solution Overview
Problem
Existing robot control systems face challenges in improving safety due to the complexity and reliability issues associated with multiple power interruption sections, which increase the likelihood of failures during motor power interruption.
Innovation Solution
A robot control device with a logical operation circuit and a power interruption circuit that integrates multiple stop signals to securely interrupt power to the driving sections, using a duplexed signal approach to reduce redundancy and failure rates, while ensuring safety through independent control of power interruption based on various signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple power interruption sections are used to diversify the reference for determining power interruption, then the reliability of power interruption control is improved, but the device complexity and the number of potential failure points increase
Solution Approach 1:
The patent combines multiple power interruption sections into a single integrated power interruption section. This single section includes multiple stop signal input terminals that receive stop signals from different sources, and internally integrates the logic for determining when to interrupt power. By merging the previously separate power interruption sections into one unified component, the patent maintains the ability to diversify stop signal references while reducing the overall number of discrete components and potential failure points in the system.
2Adaptability or versatility
If multiple independent power interruption sections are used, then the diversity of power interruption references is improved, but the ease of authentication and design becomes more difficult
Solution Approach 1:
The patent integrates multiple power interruption references into a single power interruption section with multiple input terminals, thereby maintaining reference diversity while simplifying the overall system architecture. This unified design reduces the complexity of authentication and design processes compared to having multiple independent sections, as there is only one component to authenticate and integrate into the system rather than multiple separate components that must all be coordinated and verified.
Data Source
AI summary
A robot control device that controls operation of a robot including a robot arm, a driving section configured to drive the robot arm, and a driving control section configured to receive electric power supplied to the driving section and output power to the driving section based on an input control signal, the robot control device including a logical operation circuit configured to perform a logical operation about a stop signal and output an operation result and a power interruption circuit configured to interrupt, based on the operation result, the electric power supplied to the driving control section or the control signal input to the driving control section to thereby interrupt the power of the driving section.