科学素养与生活应用·英语30篇（1）

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压电地砖如何将地铁站行人脚步转化为电能

Piezoelectric floor tiles contain crystals that produce small electric charges when compressed.
Each step applies pressure that deforms the crystal lattice and releases electrons.
The energy generated is collected via embedded wiring and stored in nearby batteries.
Tokyo’s Shibuya Station uses hundreds of such tiles to power digital signage and LED lights.
Though one step yields only milliwatts, high-traffic areas accumulate meaningful power daily.
Efficiency improves with consistent footfall patterns and optimized tile placement.
Engineers tune the crystal composition to balance durability, sensitivity, and output voltage.
Unlike solar panels, these tiles work indoors and require no sunlight to function.
They’re part of a broader trend toward ambient energy harvesting in smart cities.
Future versions may integrate sensors to monitor crowd density and flow in real time.