Ray scanning apparatus

A ray scanning apparatus, comprising:

• a conveying device, for conveying an object under inspection to pass through a scanning area of the ray scanning apparatus;
• a ray source assembly, comprising a plurality of ray source modules, each ray source module comprising multiple ray source points each emitting a ray beam, wherein the plurality of ray source modules are arranged around the scanning area merely from three sides on an upper side of the conveying device, forming a U-shape with an opening toward a lower side of the conveying device, and the plurality of ray source modules are fixed in a plane perpendicular to a conveying direction of the object under inspection;
• and
• a detector assembly, for detecting rays transmitting through the object under inspection during scanning and comprising a plurality of detector sets, end portions of the plurality of detector sets being connected to each other to surround the scanning area from four sides in a closed shape, and the plurality of detector sets being fixed in a plane perpendicular to the conveying direction of the object under inspection,
• wherein the detector assembly is located between the ray source assembly and the scanning area in a direction perpendicular to the conveying direction of the object under inspection, the ray source assembly and the detector assembly are arranged to at least partially overlap with each other in the conveying direction of the object under inspection, and the plurality of ray source modules can be mounted and detached independently of each other.