Patent ID: 6928141

Claim:
A relocatable security inspection system, comprising: a frame having first and second leg sections spaced apart from one another, the frame defining an inspection area and wherein the frame is movable along a dimension of the object; an X-ray source disposed on the frame for generating an X-ray beam into the inspection area toward the object; a detector disposed on the frame distally from the X-ray source for receiving the X-ray beam after the X-ray beam passes through the object, and for producing an output signal representative of the objects and contents thereof; an image processor for converting the output signal into a visual image of the object and contents thereof; and a self-propelling drive attached to the frame for moving the frame wherein the self-propelling drive further comprises: a light source that emits a light beam representing the desired path of travel of the frame, the light source being positioned to one side of the frame; a light sensor mounted to the frame and that receives light from the light source and that detects whether the frame is straying from the desired path of travel; and a processor to provide instructions to the frame to correct its path of travel based on information from the light sensor.