另一种是靶场周围只有两根相隔一定距离的直立标杆，可将红外传感器安装在标杆上，在两标杆之间的区域内形成能被传感器感应到的靶区。

The infrared sensors detects the shells when the fly across the plane. Another design is that there are only two upright poles in the shooting range, the infrared sensors can be fixed on the poles.

youdao

另一种是靶场周围只有两根相隔一定距离的直立标杆，可将红外传感器安装在标杆上，在两标杆之间的区域内形成能被传感器感应到的靶区。

The infrared sensors detects the shells when the fly across the plane. Another design is that there are only two upright poles in the shooting range, the infrared sensors can be fixed on the poles.

youdao