bed detector

例句：

1. 1. The bed detector detected ahidden intruder in the room.
   床探测器在房间里发现了一个隐藏的入侵者。
2. 2. The new mattress is equipped with abuilt-in bed detector to prevent sleepers from rolling off the bed.
   新床垫内置了床探测器，以防止睡眠者从床上滚落。
3. 3. The bed detector wasdesigned to alert users when they were sleeping, preventing accidents caused by falling asleep whiledriving.
   床探测器设计用来在用户睡觉时提醒他们，防止因开车睡着而发生的事故。