STEM与日常科技·英语30篇（7）

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电梯为何能自动选择楼层

Elevator control systems use destination dispatch algorithms to group passengers heading to similar floors.
Riders enter their desired floor at lobby panels before boarding, not inside the cab.
The system assigns each person to the most efficient elevator based on current position and direction.
This reduces wait times and improves energy use by minimizing unnecessary stops.
Sensors detect cabin weight and door obstructions to ensure safe operation every cycle.
Machine learning adjusts scheduling during peak hours using historical traffic patterns.
Modern elevators communicate wirelessly with building management systems for predictive maintenance.
Regenerative drives capture braking energy and feed it back into the building’s power grid.
Touchless call buttons use capacitive sensing or facial recognition in high-hygiene environments.
Emergency protocols automatically reroute elevators to the nearest exit floor during fire alarms.