You can trigger the system in different ways, but one common way is by using a passive infared sensor, or a PIR sensor, which typically detects abrupt changes in heat in a coned area, then triggers the camera and flashes.

您可以通过不同的方式触发系统，但一种常见的方式是使用被动红外传感器或 PIR 传感器， 它通常会检测锥形区域中热量的突然变化， 然后触发相机并闪光。