CN2739677Y

CN2739677Y - Wide-vision foot x-ray video imaging safety check device

Info

Publication number: CN2739677Y
Application number: CN 200420080476
Authority: CN
Inventors: 常本康; 富容国; 钱芸生; 邱亚峰; 詹启海; 高频; 魏殿修
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2004-10-22
Filing date: 2004-10-22
Publication date: 2005-11-09
Anticipated expiration: 2014-10-22

Abstract

The utility model provides a wide-vision foot X-ray video imaging safety check device, comprising an X-ray source, a receiving system and a terminal display system. The wide-vision foot X-ray video imaging safety check device is characterized in that the receiving system is arranged in a sealed box body, one side face of the box body and the corresponding position between the X-ray source and the rare earth green sensing screen of the receiving system are provided with foot checking ports, the checked person only needs to lift feet higher than the normal walking to make the feet be extended into the foot checking ports and keep less than one second, and the system can quickly and accurately obtain the clear image of the feet under the case of not taking off shoes. The utility model has large receiving breadth face and is able to sufficiently cover all classes of big and small shoes, the wide-vision foot X-ray video imaging safety check device not only is able to check out the shapes of the hidden objects and also is able to judge the classes of the hidden objects, X-ray dosage and leaking dosage accord with the medical protection safety criterion, and the integral device can be optionally moved as required, having convenient use, and the device can be used for each department needing the safety check, such as airports, ports, customs, etc.

Description

Big visual field foot X ray video imaging safety check apparatus

One, technical field

The utility model relates to a kind of X ray video imaging safety check apparatus, particularly a kind ofly under the situation that tested personnel do not take off one's shoes whether its foot is hidden the big visual field foot X ray video imaging safety check apparatus that prohibited items carry out safety inspection.

Two, background technology

Attach great importance to a volume poison both at home and abroad, prevent probably being the safety inspection of purpose, as departments such as airport, harbour, customs.At present the inspection means that foot is generally adopted are to allow tested personnel inspections of taking off one's shoes: the inner case that adopts metal detector detection heel and sole, but this method can only check whether there are the metal implements, and can not differentiate its shape, can not find non-metal article as classes such as drugs; And this taking off one's shoes checked not only trouble, time-consuming, also is difficult to tacit agreement on cooperating.To can finishing method such as the x-ray imaging device that its foot is checked under the situation of not taking off one's shoes, but it needs wide-field x-ray imaging device to cover more fully the various large size footwear of being grown up; And traditional strong device of X line image mostly adopts 9 cun the visual field, and a spot of is 12 cun, is not suitable for the safety check of foot, and whole dependence on import, and price is very expensive, and the price that therefore also constitutes whole safety check apparatus is difficult to accept for safety check department.So to the inspection of tested personnel's foot, checking except taking off one's shoes, still do not have not only convenient but also check means completely, in the footwear, the nondestructive inspection of the prohibited items hidden of heel and even sole still exists leak and is the difficult problem that urgency is to be solved.

Three, summary of the invention

It is a kind of under the situation that tested personnel do not take off one's shoes that the purpose of this utility model is to provide, and can carry out safety inspection quick and precisely to its foot, and cheap, big visual field foot X ray video imaging safety check apparatus simply and easily.

The purpose of this utility model is achieved through the following technical solutions, big visual field foot X ray video imaging safety check apparatus, it comprises x-ray source, receiving system and terminal display system, it is characterized in that receiving system is made up of green screen of rare earth sense, varifocus objective, brightness of image booster, relay lens, ccd video camera, terminal display system is made up of image processor and display; On x-ray source, green screen of rare earth sense, varifocus objective, brightness of image booster, relay lens, ccd video camera are successively set on chassis in the casing along light path, have a foot examine oral in the side and the corresponding position between x-ray source and green screen of rare earth sense of casing; Ccd video camera is positioned at the focus place of relay lens, and its output terminal and image processor join, and the output of image processor connects display.The utility model in use, tested personnel only need than normal slightly high any the pin height of lifting of walking foot to be put in the foot examine oral of casing, the duration was no more than for 1 second, just can install terminal by this and show its foot distinct image.Detection principle of the present utility model is: send radiation exposure measured foot by x-ray source, behind green screen of rare earth sense, can be converted to visual picture with corresponding bright, by varifocus objective as required by electronic realization continuous vari-focus, change the visual field, press principle that the square distance inverse proportion decays as can be known according to the emission light intensity, the image that transmits has so far belonged to weak luminosity class scope, as directly receive the image that then can not obtain to have enough signal to noise ratio (S/N ratio)s with the ccd video camera television system.For the picture element that obtains to meet the demands, this device adopts the brightness of image booster that the brightness that image carries out 3 to 4 orders of magnitude is strengthened, the frame of X line is converted to has well-lit visible green image, by relay lens this image and ccd video camera are coupled again, after image processor video information is made digital noise reduction, frame adds up and is contrasted processing such as enhancing, at last show the interior details of tested foot and the image of profile, scout and judgement for the security staff by terminal.

The utility model compared with prior art its remarkable advantage is: 1, from audit function, the x-ray imaging principle of utilizing this device realizes the foot safety inspection of tested personnel under the situation of not taking off one's shoes, not only can find the shape of hiding article, can also judge its classification according to gradation of image, and can realize the big visual field; 2, from test mode and effect, the utility model technology only needs tested personnel than normal slightly high any the pin height of lifting of walking foot to be put in foot examine oral, and duration＜1 second just can obtain the foot image under the situation of not taking off one's shoes.Roentgen dose X＜the 3mA that uses meets the medical protection standard, and leaking dose meets relevant safety standard; 3, the utility model technology adopts the intensifying screen of large format, can fully cover adult's large size footwear.As pulley is installed, then can move single unit system down as required on the casing chassis, uses in each security check passage transposing easily.Clear picture, fast and convenient, needing can be widely used in all departments of safety inspection as airport, harbour, customs etc.

Concrete structure of the present utility model is provided by the following drawings and embodiment.

Four, description of drawings

Fig. 1 is the structural principle synoptic diagram of the big visual field described in the utility model foot X ray video imaging safety check apparatus.

Fig. 2 is the box shape synoptic diagram of big visual field foot X ray video imaging safety check apparatus.

Five, embodiment

With reference to the accompanying drawings concrete structure of the present utility model is described in further detail below.Referring to Fig. 1, according to the big visual field described in the utility model foot X ray video imaging safety check apparatus, it is made up of x-ray source 1, green screen of rare earth sense 2, varifocus objective 3, brightness of image booster 4, relay lens 5, ccd video camera 6, image processor 7 and display 8.X-ray source 1 adopts the X ray assembly of homemade medical XQ16-XA3, it is substrate that green screen of rare earth sense 2 adopts the thick alumina based material of 1mm, and under the prerequisite that does not increase phosphor powder layer thickness, increase its density, so that keeping under the high resolving power prerequisite, the output brightness of the green screen of sense is improved.Varifocus objective 3 adopts the special electric zoom lens, on x-ray source 1, green screen of rare earth sense 2, varifocus objective 3, brightness of image booster 4, relay lens 5, ccd video camera 6 are fixed on chassis 11 in the casing 9 successively along light path.Referring to Fig. 2, be provided with pulley 12 below the chassis 11, this sampling device can arbitrarily move as required.A side of casing 9 is near chassis place, and the correspondence position between x-ray source 1 and green screen of rare earth sense 2 has a foot examine oral 10, uses as the foot inspection of wearing footwear.Image processor 7 and display 8 are arranged in the observation ward, and the output of the input of image processor 7 and ccd video camera 6 is joined, and the input of the output of image processor 7 and display 8 is joined.

Claims

1, a kind of big visual field foot X ray video imaging safety check apparatus, it comprises x-ray source [1], receiving system and terminal display system, it is characterized in that: receiving system is made up of green screen of rare earth sense [2], varifocus objective [3], brightness of image booster [4], relay lens [5], ccd video camera [6], and terminal display system is made up of image processor [7] and display [8]; On x-ray source [1], green screen of rare earth sense [2], varifocus objective [3], brightness of image booster [4], relay lens [5], ccd video camera [6] are successively set on chassis [11] in the casing [9] along light path, have a foot examine oral [10] in the side and the corresponding position between x-ray source [1] and green screen of rare earth sense [2] of casing [9]; Ccd video camera [6] is positioned at the focus place of relay lens [5], and its output terminal and image processor [7] join, and the output of image processor [7] connects display [8].

2, the big visual field according to claim 1 foot X ray video imaging safety check apparatus, it is characterized in that: green screen of rare earth sense [2] adopts with the high brightness green screen of rare earth sense of alumina based material as substrate.

3, the big visual field according to claim 1 and 2 foot X ray video imaging safety check apparatus is characterized in that: be provided with pulley [12] below chassis [11].