Wireless Multi-User Lockout Interface Without Mechanical Keys
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Solution Overview
Problem
Conventional lockout/tagout devices and procedures are cumbersome and inefficient, particularly in large electrical power systems, due to the logistical challenges of managing and tracking numerous mechanical locks and keys, delays in key availability, and the need for coordinated efforts by multiple workers, leading to increased costs and downtime.
Innovation Solution
The implementation of electronically actuated multi-user locking mechanisms with wireless control interfaces, allowing workers to securely establish and remove safety lockout chains using electronic credentials, eliminating the need for physical keys and enabling remote participation, thus reducing the number of locks required and streamlining the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mechanical lockout/tagout devices are used, then worker safety is ensured through physical locking mechanisms, but the system becomes cumbersome and inefficient due to the need to manage and track numerous mechanical locks and keys
Solution Approach 1:
The patent replaces conventional mechanical locking mechanisms with an electronically actuated locking device that uses electronic credentials (RFID cards, key fobs, or mobile devices) to control access. The electronic lockout/tagout system eliminates the need for physical keys and mechanical lock management, while maintaining worker safety through electronic authentication and automated locking protocols
Solution Approach 2:
The system creates electronic copies of traditional lockout functionality through software-based authentication mechanisms. Instead of physical keys, workers use electronic credentials that can be digitally replicated and managed, allowing multiple access methods (RFID cards, mobile devices) to replace single physical keys without increasing physical lock inventory
2Reliability
If multiple workers use conventional mechanical locks, then safety is maintained through coordinated locking, but delays occur due to key availability issues and the need for coordinated efforts by multiple workers
Solution Approach 1:
The electronic locking device incorporates real-time feedback mechanisms that track the status of each worker's lockout credential. The system automatically monitors which workers have active lockout credentials, their current location, and the status of locked equipment. This feedback enables automatic coordination of lockout/release operations, eliminating the need for manual key coordination and reducing delays
Solution Approach 2:
Workers can independently manage their own lockout credentials using electronic devices. The system automatically handles authentication, lock engagement, and release coordination without requiring physical key exchange or manual coordination between workers. The electronic system self-manages the complex multi-worker coordination that previously required human intervention
3Reliability
If conventional mechanical locking systems are used in large electrical power systems, then safety isolation is achieved, but costs and downtime increase due to the number of locks required and management overhead
Solution Approach 1:
The electronic locking device serves multiple functions simultaneously: it acts as a lockout mechanism, an authentication system, a tracking device, and a communication interface. A single electronic device can replace numerous mechanical locks, providing universal access control across multiple locations and equipment types, thereby reducing the total number of locking devices needed and lowering overall system costs
Solution Approach 2:
The system changes the fundamental parameters of lockout management from physical to digital domain. Instead of managing physical lock inventory, key distribution, and mechanical maintenance, the system manages electronic credentials and software protocols. This parameter change dramatically reduces the resources required for lockout/tagout operations while maintaining or improving safety isolation effectiveness
Data Source
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AI summary
Lockout/tagout devices are configured to receive multi-user, electronically generated locking and unlocking commands over wireless interfaces to realize lockout safety chains of a desired length to assure worker safety in an industrial system. Electronically implemented systems and methods are also disclosed providing for enhanced worker safety, increased security, and improved lockout/tagout oversight involving a reduced number of locking devices and with fewer complications compared to conventional lockout/tagout devices, systems and processes.