STEM与日常科技·英语30篇（6）

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压电地砖如何将行人脚步转化为电能

Piezoelectric floor tiles contain crystals like quartz or lead zirconate titanate that produce voltage when mechanically stressed.
Each step applies pressure that deforms the crystal lattice, separating positive and negative charges across its surface.
Energy harvesters convert these brief high-voltage pulses into stable low-voltage DC power for LED lighting.
Installations in Tokyo train stations and London airports demonstrate scalability under real-world foot traffic loads.
Efficiency depends on step frequency, weight distribution, and tile alignment to maximize cumulative deformation cycles.
Engineers embed capacitors to store intermittent energy until enough charge accumulates for useful output.
Unlike solar panels, piezoelectric systems generate power day and night wherever movement occurs consistently.
Material fatigue testing ensures tiles withstand ten million steps before performance declines by more than 10%.
These systems illustrate energy conversion principles linking mechanics, electromagnetism, and circuit design.
They transform passive infrastructure into active contributors to localized renewable energy networks.