开门信号
enabling signal
自动门的开门信号是触点信号，微波雷达和红外传感器是常用的两种信号源：
The open door signal of automatic door is contact signal, and microwave radar and infrared sensor are two common signal sources.
微波雷达是对物体的位移反应，因而反应速度快，适用于行走速度正常的人员通过的场所，它的特点是一旦在门附近的人员不想出门而静止不动后，雷达便不再反应，自动门就会关闭，对门机有一定的保护作用。
Microwave radar is a response to the displacement of objects, so it has a fast response speed. It is suitable for the places where people with normal walking speed pass through. Its characteristic is that once the people near the door do not want to go out and remain still, the radar will no longer react, and the automatic door will be closed, which has a certain protective effect on the door crane.
红外传感器对物体存在进行反应，不管人员移动与否，只要处于传感器的扫描范围内，它都会反应即传出触点信号。缺点是红外传感器的反应速度较慢，适用于有行动迟缓的人员出入的场所。
Infrared sensors respond to the presence of objects. Whether people move or not, as long as they are within the scanning range of sensors, they will respond and send out contact signals. The disadvantage is that the reaction speed of infrared sensor is slow, and it is suitable for the places where people with slow movement enter and exit.
另外，如果自动门接受触点信号时间过长，控制器会认为信号输入系统出现障碍。而且自动平移门如果保持开启时间过长，也会对电气部件产生损害。由于微波雷达和红外传感器并不了解接近自动门的人是否真要进门，所以有些场合更愿意使用按键开关。
In addition, if the automatic door takes too long to receive the contact signal, the controller will think that there is an obstacle in the signal input system. Moreover, if the automatic translation door is kept open for too long, it will also cause damage to electrical components. Because microwave radar and infrared sensors don't know whether people close to automatic doors really want to enter, they prefer to use button switches in some situations.