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How Automatic Doors Sense Your Approach at Supermarkets
超市自动门如何感知你走近
精读先不看文字,完整听一遍。
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Many supermarket doors open without you touching them.许多超市的门无需触碰即可自动打开。
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They use infrared sensors that detect body heat and movement.它们使用红外传感器来探测人体热量和移动。
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When you walk within two meters, the sensor sends a signal to the motor.当你走进两米范围内时,传感器会向电机发送信号。
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The door then slides smoothly sideways in less than one second.门随即在不到一秒内平稳侧滑开启。
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This system works even if you carry shopping bags or push a cart.即使你提着购物袋或推着购物车,这套系统依然有效。
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It saves energy by staying closed when no one is nearby.无人靠近时,门保持关闭以节省能源。
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Maintenance staff clean the sensor lens weekly to keep it accurate.维修人员每周清洁一次传感器镜头,确保其精准。
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Some doors pause briefly if a child walks through slowly.有些门在儿童缓慢通过时会短暂暂停。
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You can see a small red light near the frame when it’s active.门框附近会亮起一小颗红灯,表示正在运行。
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Try waving your hand gently — the door will often respond right away.试着轻轻挥手——门通常会立即响应。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- Many supermarket doors open without you touching them. 许多超市的门无需触碰即可自动打开。
- They use infrared sensors that detect body heat and movement. 它们使用红外传感器来探测人体热量和移动。
- Some doors pause briefly if a child walks through slowly. 有些门在儿童缓慢通过时会短暂暂停。
④ 懂 · 选一选
⑤ 今天会说这一句
Many supermarket doors open without you touching them.
⑥ 跟读并录音
Many supermarket doors open without you touching them.
第一版:录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达,自己说一句。
例子:Many supermarket doors open without you touching them.
已记下。连续天数以后会显示在课表里。
陈老师指导
课程开发中,敬请期待。成人和孩子都可以先自学听读、精读。
这边的讲解音轨还在做。想先跟着老师走完固定 30 课,可以去陈老师带读社(和自学通行不是同一份会员)。
课程开发中,敬请期待。