Apparatus and method for inspecting moving target

A fast imaging and inspection apparatus for a moving target, comprising:

• a passage for the moving target to pass therethrough;
• a scanning and imaging device, comprising a betatron for generating X-rays, and a detector for receiving X-rays penetrating through the moving target, wherein the betatron images the moving target by emitting the X-rays to the moving target passing through the passage;
• a first position sensor, disposed at a position away from and on one side of the scanning and imaging device and configured to output a sensing signal indicating whether the moving target begins to enter the passage;
• a second position sensor, disposed between the first position sensor and the scanning and imaging device, and configured to detect a type feature of the moving target, distinguish a protected part of the moving target from an unprotected part of the same, section the moving target, and output a sensing signal indicating whether the protected part of the moving target is passing or has already passed through a radiation scanning area;
• and
• a control unit, connected to the scanning and imaging device, the first position sensor and the second position sensor, and configured to power on the betatron to place it in a standby state upon receiving the sensing signal indicating that the moving target begins to enter the passage from the first position sensor, and control a beam emitting time-point and a beam emitting mode of the betatron to correspondingly inspect respective sections of the moving target when the second position sensor detects that the respective sections are passing through the radiation scanning area,
• wherein a distance between the first position sensor and the scanning and imaging device is set to be greater than a predetermined value, such that a time period from a moment when the first position sensor detects the moving target to a moment when the moving target begins to enter the radiation scanning area is longer than or equal to a time period by which the betatron is powered on to reach the standby state.