Biometric Lockout HMI for Secure Industrial Power Isolation
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Solution Overview
Problem
Existing remote low-voltage lockout systems lack enhanced safety, reliability, security, audit capabilities, and operator convenience in industrial equipment maintenance.
Innovation Solution
An electronic safety function lock-unlock system utilizing redundant 3D cameras for facial and gesture recognition, combined with voice recognition and touchscreen inputs, to control power switch units in industrial equipment, ensuring secure and reliable lockout and tagout operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical padlocks and printed tags are used for lockout and tagout operations, then the system meets safety standards and provides reliable power disconnection, but the system lacks enhanced audit capabilities, biometric verification, and operator convenience
Solution Approach 1:
The patent replaces physical padlocks and printed tags with an electronic system that uses facial recognition technology, touchscreens, and voice commands. The HMI device captures facial images, processes biometric data, and electronically controls power switch units, eliminating the need for mechanical locking devices and physical tags while maintaining safety standards compliance.
Solution Approach 2:
The patent introduces a human-machine interface (HMI) device as an intermediary between the operator and the power switch unit. The HMI device mediates the lockout and tagout operations by capturing facial biometrics, verifying operator identity, and electronically controlling the power disconnection, providing both safety and enhanced audit capabilities through digital logging.
2Ease of operation
If remote low-voltage lockout systems are used to eliminate physical padlocks and tags, then operator convenience is improved, but the system lacks redundant biometric verification and enhanced security features
Solution Approach 1:
The patent implements redundant facial recognition verification as a preliminary safety measure before allowing power disconnection or reconnection. The system captures and verifies facial biometrics in advance, ensuring that only authorized operators can perform lockout or tagout operations, thereby cushioning against unauthorized access or accidental reactivation.
Solution Approach 2:
The patent incorporates feedback mechanisms where the HMI device provides real-time visual and audio feedback to operators during lockout and tagout operations. The system displays verification status, confirms power disconnection state, and logs all operations with timestamps and operator identity, providing continuous feedback that enhances security and audit capabilities.
3Device complexity
If traditional lockout systems are used with physical padlocks and tags, then the system provides simple and reliable power disconnection, but the system lacks biometric verification, gesture recognition, and voice recognition capabilities
Solution Approach 1:
The patent transforms the HMI device into a multi-functional system that combines facial recognition, gesture recognition, voice recognition, touchscreen interaction, and electronic power control. This universal device performs multiple functions that were previously requiring separate systems, including biometric verification, operator authentication, and power switch unit control, thereby increasing adaptability while maintaining manageable complexity.
Data Source
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AI summary
An electronic safety function lock-unlock system includes a human-machine interface (HMI) device. The HMI device includes a touchscreen display for touch input and one or more cameras for capturing gesture input data and operator facial image data. The HMI device is operatively connected to a power switch unit or similar device for selectively interrupting conduction of electrical power to industrial equipment for safety. An operator initiates a lock operation with respect to the equipment using first touchscreen or first gesture input to perform a lock operation to disconnect the industrial equipment from electrical power. An operator initiates an unlock operation or condition (to remove a lock condition) with respect to the equipment using second touchscreen input or second gesture input. The HMI optionally require vocal confirmation from an operator of a requested lock or unlock operation. The HMI can compare a captured image of the operator's face to a database of authorized facial images to determine if the operator is authorized to initiate a lock operation and initiates the lock operation only if the operator is authorized. The power switch unit is set to conduct electrical power to the industrial equipment only if the number of active lock conditions equals zero.