Industrial Robot Backup Safety Circuit Delay Mechanism
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Solution Overview
Problem
Existing industrial robot control safety systems face a common mode failure issue where both primary and backup safety circuits age synchronously, leading to potential simultaneous failure and wasteful redundant designs.
Innovation Solution
Incorporating a delay system within the backup safety circuit that introduces a time delay before responding to a warning signal, allowing the primary safety circuit to respond first, thereby preventing simultaneous failure and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two safety circuits are substantially the same and work at the same time, then redundancy is provided, but the redundant design of two systems may lead to waste of energy and materials
Solution Approach 1:
The patent reduces energy waste by dynamically controlling the power state of the backup safety circuit. During normal operation, the backup circuit remains inactive or in a low-power state, consuming minimal energy. Only when the primary circuit fails does the backup circuit activate and consume full power, thus eliminating continuous energy waste while maintaining redundancy for safety purposes.
Solution Approach 2:
The patent extracts the backup safety circuit from the active operational state and places it in a standby or inactive state during normal operation. This separation allows the system to maintain the redundancy capability while removing the unnecessary energy consumption associated with having both circuits fully operational simultaneously, thus taking out the harmful energy waste element.
Data Source
AI summary
The present disclosure provides an industrial robot safety control system, a back-up safety circuit and a safety module. The safety module includes a first safety circuit and a second safety circuit. The first safety circuit and the second safety circuit receive a warning signal at a same time. The first safety circuit is configured to respond to the warning signal. The second safety circuit include a delay system and an event response circuit. The delay system sets a time delay when receiving the warning signal, wherein, when the delay system does not receive a first control signal indicating that the first safety circuit has responded to the warning signal during the time delay, the delay system controls the event response circuit to respond to the warning signal. The present disclosure may help avoid the problem of common mode failure of the back-up safety mechanism.