Behind the scenes of subway operation, the maintenance garage plays a crucial role, determining whether each train can operate safely and on time. UWB (Ultra Wideband) personnel positioning technology is like an invisible "guardian", quietly entering the subway maintenance garage, making great contributions to optimizing its operation process and ensuring personnel safety.
UWB technology is based on ultra short pulse signals for positioning. By emitting ultra narrow pulses at the nanosecond or even picosecond level, it uses the round-trip time between the signal and the tag carried by the equipment and personnel to accurately calculate the distance. Combined with triangulation and multilateral positioning algorithms, it determines the real-time position of personnel in the maintenance warehouse with an accuracy of centimeter level. Compared with traditional GPS and Bluetooth positioning, UWB is not afraid of the complex environment of metal equipment and severe signal obstruction in the maintenance warehouse, with strong signal anti-interference and excellent penetration ability; And the positioning refresh rate is high, with multiple positioning updates per second, which can capture personnel dynamics in real time, like equipping maintenance personnel with a pair of precise "electronic eyes".
Dangerous area warning: There are many high-risk areas such as high-voltage electrical areas, track live areas, and large machinery operation areas in the maintenance workshop. After equipping employees with UWB positioning tags, the system can preset electronic fences for dangerous areas. Once personnel accidentally enter, an alarm will be triggered instantly, notifying management and relevant personnel in real time, nip the danger in the bud, and avoid accidents such as electric shock and mechanical injury. For example, when maintenance personnel approach the current collector (live equipment) of a train being operated and debugged, the warning system immediately responds to ensure personnel safety.
Emergency rescue support: In the event of an emergency situation such as a fire or collapse, with smoke and obstructed vision, traditional methods of finding people can be difficult. The UWB positioning system can quickly locate the location of trapped personnel, plan the optimal route for rescue teams, greatly save rescue time, and improve the survival rate of trapped personnel. Accurate positioning information is presented intuitively on the large screen of the command center, allowing rescue operations to proceed in an orderly manner.
Accurate personnel scheduling: The subway maintenance process is complex, and multiple types of workers such as electricians, fitters, and debuggers need to be coordinated at different times. With the help of UWB positioning data, dispatchers can know the real-time location, job types, and current task progress of each personnel, accurately dispatch suitable personnel to the work site, reduce personnel running and waiting time, and make the maintenance process compact and efficient, like creating an intelligent "dispatch hub" for maintenance operations.
Working hour statistics and performance evaluation: The system records in detail the duration and movement trajectory of each maintenance personnel in each work area, accurately calculating working hours and analyzing work efficiency based on this. On the one hand, it provides a reliable basis for salary accounting; On the other hand, it helps managers identify operational bottlenecks, improve processes and train employees in a targeted manner, and enhance overall maintenance efficiency.
The UWB personnel positioning system can be deeply integrated with the existing equipment management system and work order system of the subway maintenance depot. When maintenance personnel approach the faulty equipment, equipment information, maintenance history, and work order details will automatically pop up to assist in precise maintenance; It can also be integrated with the access control system to achieve precise control of personnel permissions, and unauthorized areas are prohibited from passing. In the future, by combining big data and artificial intelligence technology, we can further explore the value of positioning data, predict equipment failures and personnel safety hazards, and continuously empower subway maintenance and operation.
The introduction of UWB personnel positioning technology in the subway maintenance garage is not simply about location tracking, but about reshaping the safety management mode and optimizing the operation ecology in all aspects, laying a solid foundation for the smooth operation of the subway and helping the steady progress of urban rail transit.
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