Patent Number: 
Section: claims

1. A container inspection equipment with the cobalt-60 γ-ray source or the cesium-137 γ-ray source and a cesium iodide or cadmium tungstate detector, comprising:a γ-ray source and a cask for shielding the source;a front collimator and a rear collimator;a detector and the related electronic circuit;a signal and image processing system; anda container trailer system and an automatic control system, wherein:the radiation source is a cobalt-60 γ-ray source or a cesium-137 γ-ray source;the detector is a cesium iodide or cadmium tungstate array detector;the cobalt-60 γ-ray source or the cesium-137 γ-ray source is equipped with a beam shutter configured to automatically open and close, the beam shutter is connected with the cask of the γ-ray source;the cesium iodide or cadmium tungstate array detector is a strip array constituted of blocks in series arrangement consisting cesium iodide or cadmium tungstate scintillator crystals each coupled to a silicon photodiode and an electrical circuit;the cask of the cobalt-60 γ-ray source or the cesium-137 γ-ray source, the beam shutter, and the front collimator are fixed on a first common chassis that is placed in a source room;the rear collimator, the cesium iodide or cadmium tungstate array detector and a radiation catcher are fixed on a second common chassis that is placed in a detector room; andbetween the source room and the detector room is a container inspection tunnel. 2. The container inspection equipment of claim 1, wherein the activity of the cobalt-60 γ-ray source is ≦20.35 TBq. 3. The container inspection equipment of claim 1, wherein the cask of the cobalt-60 γ-ray source or the cesium-137 γ-ray source consists of a tungsten alloy semi-sphere and a lead semi-sphere, being enveloped by a stainless steel case to form an integrated cask. 4. The container inspection equipment of claim 3, wherein the beam shutter is a swing type iron shutter, the shutter is opened or closed using an electromagnetic driver and a restoring spring, the open or close duration is less than 0.3 second, the beam shutter is connected with the tungsten alloy semi-sphere of the cask, a collimating slit between them is accurately aligned with a slit of the front collimator, and the slit width is 6˜8 mm. 5. The container inspection equipment of claim 4, wherein the front and the rear collimators are made of iron, lead and the alloys thereof, in the shape of a single dog leg line, the width of the slit is 6˜8 mm. 6. The container inspection equipment of claim 1, wherein the cesium iodide or cadmium tungstate array detector is a strip array constituted of blocks in series arrangement in the vertical direction consisting plurality of cesium iodide or cadmium tungstate scintillator crystals each coupled to a silicon photodiode and an electrical circuit. 7. The container inspection equipment of claim 1, wherein the cross section of the scintillation crystal is a strip of 10˜50 mm2, the length is ≦8cm. 8. The container inspection equipment of claim 1, wherein the container trailer system includes a detection trolley for carrying a container truck, a frequency control drive motor, a control system, a rail and a support rail beam. 9. The container inspection equipment of claim 1, wherein the signal and image processing system uses digital circuit and microcomputer and is located in a master control and image processing room which is remote from the cobalt-60 γ-ray source or the cesium-137 γ-ray source and the inspection tunnel. 10. The container inspection equipment of claim 1, wherein the automatic control system includes a master computer, programmable logic control, radiation dose monitoring, and position, temperature, and humidity sensors, and closed circuit TV for surveillance.