The present disclosure provides an opening and closing
radar protection device, comprising a mounting frame, a protective cover, a driving device and a guide device, the driving device and the guide device are arranged on the mounting frame, one end of the guide device is connected with the protective cover, the other end of the guide device is connected with the driving device, the driving device is used for driving the guide device to move so that the protective cover rotates at the opening end of the mounting frame; the protective cover is used for closing the opening end of the mounting frame. The present disclosure also provides a material level measuring
system. The present disclosure sets an opening and closing protection device to protect the scanning
radar, reduces the influence of dust and other impurities on the use of the scanning
radar, and improves the service life of the scanning radar and the measuring accuracy of the
system.