STEM与日常科技·英语30篇（7）

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智能插座为何在电器关闭时仍上报能耗数据

Smart plugs monitor standby power draw — often called 'vampire load' — even when connected devices appear switched off.
They contain current-sensing chips that detect tiny flows as low as 0.1 watt through internal transformers.
This helps identify inefficient electronics like older game consoles or cable boxes that leak energy constantly.
Data uploads hourly to cloud dashboards showing cumulative idle consumption over weeks.
Some models send alerts if standby usage exceeds preset thresholds for specific outlets.
The plug’s own LED indicator dims but stays active to maintain network connectivity and sensing capability.
Engineering choices prioritize ultra-low-power components so monitoring adds less than 0.3 watts to total draw.
Users can schedule automatic cutoffs during sleeping hours to eliminate phantom loads entirely.
Regulatory standards now require such visibility to support national energy-saving initiatives.
Understanding hidden consumption empowers smarter choices about device replacement and usage habits.