Hybrid GPS RFID Tracking System for Underground Safety
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Solution Overview
Problem
Current systems fail to effectively monitor and alert workers in real-time about potential dangers from plant and machinery both above and below ground, particularly in underground environments where GPS systems are ineffective and radio frequency identification devices have limitations, leading to safety risks due to lack of direct line of sight and human error.
Innovation Solution
A computerized safety tracking and proximity warning system using a combination of RFID chips, GPS, and a mesh network for wireless communication, integrated into safety equipment like helmets or vests, providing a visual and auditory alert system with real-time location tracking and video imaging, enabling seamless monitoring above and below ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS systems are used for above ground monitoring, then worker location tracking is improved, but the system becomes useless in tunnels or below ground
Solution Approach 1:
The system employs multiple tracking technologies (GPS for above ground, RFID for below ground) that can function independently in different environments, allowing the same safety monitoring system to be universally effective both above and below ground without requiring separate systems
2Adaptability or versatility
If radio frequency identification devices are used below ground, then worker tracking is enabled, but the devices are inherently short range and require multiple nodes or beacons
Solution Approach 1:
The below ground tracking system is segmented into multiple RFID nodes or beacons distributed throughout the underground area, each handling local tracking while collectively providing comprehensive coverage of the entire workspace
3Ease of operation
If audible warning alarms are used to alert workers, then warning capability is improved, but the alarms can be muffled by workers wearing hearing protection
Solution Approach 1:
The system introduces visual display devices (such as LED lights or screen displays) as an intermediary warning mechanism that communicates alerts to workers through light or visual signals, which can be perceived even when workers are wearing hearing protection, thereby maintaining warning effectiveness
4Reliability
If human spotters are used to monitor workers, then direct monitoring is improved, but human error and absence of spotter crew reduce reliability
Solution Approach 1:
The system enables automated monitoring where the tracking and warning functions serve themselves without requiring human spotters, using electronic sensors, RFID tags, and automated alert systems to continuously monitor worker positions and provide warnings, thereby eliminating human error and availability issues while maintaining continuous monitoring
5Ease of operation
If mirrors are used on heavy machinery to expand operator view, then line of sight is improved, but the operator still cannot sight all areas of the plant
Solution Approach 1:
The system replaces mechanical visual aids (mirrors) with electronic tracking technology that uses RFID tags on workers and sensors on machinery to digitally track and display worker positions relative to equipment, providing comprehensive area coverage that mechanical mirrors cannot achieve
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures real-time tracking and alerting of workers' positions relative to plant and equipment, reducing the risk of injury or death by providing a comprehensive and accurate visual and auditory warning system that operates seamlessly across different levels, even without direct line of sight, and logs events for analysis.
Implementation Method 1
radio frequency identification devices can be used below ground but are inherently short range devices which require multiple nodes or beacons to activate associated transponders
Implementation Method 2
The wireless communication protocols include a mesh network of radio frequency identification (RFID) chips embedded in safety equipment worn by personnel and incorporated in plant and machinery detected by nodes/beacons
Implementation Method 3
While there are GPS systems for above ground monitoring
Implementation Method 4
The wireless communication protocols include a global positioning (GPS) system when operating above ground or in the open
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A computerized safety tracking and proximity warning method and system for personnel, plant and equipment operating both above and below the ground and moving therebetween comprising a computer adapted to receive wireless position information from transponders carried or worn by personnel, and affixed to plant or equipment via one or more wireless communication protocols to provide a seamless visual display of their relative positions whether above or below ground level or moving therebetween, and wherein an alarm is triggered to alert an operator or worker if the locations of the personnel and plant or equipment are within a predetermined and unsafe distance of each other.