crystal video detector

例句：

1. 1.The crystal video detector was used to detect the intruder's location.
   晶体视频探测器被用来探测入侵者的所在地。
2. 2.The crystal video detector is highly sensitive and can detect small movements.
   晶体视频探测器非常敏感，可以探测微小的运动。
3. 3. The crystal video detector was installed at the entrance of the building to prevent any unauthorized access.
   在建筑物的入口处安装了晶体视频探测器，以防止未经授权的进入。