CN2336381Y

CN2336381Y - Portable pulse digital X-ray imaging apparatus

Info

Publication number: CN2336381Y
Application number: CN 97242063
Authority: CN
Inventors: 王�义; 王奎禄; 王经瑾; 刘国治; 张元林; 曹锦云
Original assignee: Northwest Institute of Nuclear Technology
Current assignee: Northwest Institute of Nuclear Technology
Priority date: 1997-10-24
Filing date: 1997-10-24
Publication date: 1999-09-01
Anticipated expiration: 2007-10-24

Abstract

The utility model relates to a portable pulse digital X-ray imaging apparatus. A notebook computer (3) is connected with a portable pulse source (5) by a data acquisition and control interface (4) and is connected with a detector box (1) by an image collecting card (2). The detector case is caused to detect the radiation image of a measured object, and the image is sent to the notebook computer by the image collecting card. The utility model has the advantages of small size, portability, high image taking speed, and clear image.

Description

Portable pulse digit x-ray imaging device

The utility model relates to a kind of x-ray imaging device of portable pulse digitization.

At present X ray projection imaging device be mainly used in to storage thing in the container monitor, to metal object flaw detection or medical etc., concentrate on hospital, industry and safety detection place mostly.Existing X ray projection imaging device, it generally uses the continuous X-rays source, and volume is big and heavy, carries inconvenience, is unsuitable for the detection of field and some specific occasion.Existing Portable X-ray somascope is made up of portable x-ray source and X ray camera or television system, and the somascope volume that has television system is still huger, does not have portable advantage substantially.The device that has the X ray camera owing to adopt high performance egative film imaging, needs a plurality of pulses just can obtain than distinct image, and therefore, its image taking speed is low, and cost is also higher.In addition, the film image dynamic range is not high, is unfavorable for distinguishing the details of image, and image is difficult to handle again.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provides a kind of volume little, in light weight, clear picture and imaging speed is fast, cost is low, the portable pulse digit x-ray imaging device that dynamic range of images is high.

The purpose of this utility model can reach by following measure:

A kind of portable pulse digit x-ray imaging device, comprise computing machine, x-ray source and detector case (1), its special character is: described x-ray source is portable impulse source (5), described computing machine is the notebook (3) of band expansion cabinet, this notebook (3) obtains by data and control interface (4) is connected with portable impulse source (5), is connected with detector case (1) by image pick-up card (2).

Data of the present utility model obtain and control interface (4) can comprise electronic switch (15) and (16) that are connected with described portable impulse source (5) by socket (21), the logic control circuit (18) and the address decoding (19) that are connected with described notebook (3) by expanded slot of computer (20), described electronic switch (15) directly is connected with logic control circuit (18), described electronic switch (16) is connected with logic control circuit (18) through trigger (17), and described address decoding (19) also is connected with logic control circuit (18).

Socket of the present utility model (21) can adopt socket J ₂Described electronic switch (15), (16) can be adopted photoelectricity coupling and device U respectively ₁, U ₁₄Described trigger (17) is by the monostalbe trigger U that is connected ₁₁, U ₁₂Constitute monostalbe trigger U ₁₁Input termination logic control circuit (18), monostalbe trigger U ₁₂Output through not gate U ₁₃With photoelectricity coupling and device U ₁₄Join; Described address decoding (19) is by the eight bit comparator U that are connected to switch S and exclusion RP ₁₅Constitute; Described expanded slot of computer (20) is expansion slot J ₁Described logic control circuit (18) comprises and is connected to expanded slot of computer J ₁The impact damper U of IOR end ₃, its output warp or door U ₄Meet impact damper U ₅Control end, impact damper U ₅Output meet expanded slot of computer J ₁D ₀End, impact damper U ₂Input termination expanded slot of computer J ₁IOW end, impact damper U ₂Output through or the door U ₁₀With monostalbe trigger U ₁₁Join, meet expansion slot J ₁Or the door U ₆With comparer U ₁₅Output meet Sheffer stroke gate U respectively ₇, U ₈Input end, Sheffer stroke gate U ₇, U ₈Output through Sheffer stroke gate U ₉Connect or door U ₁₀Input end.

The accompanying drawing drawing is described as follows:

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is the structural representation of the utility model detector case;

Fig. 3 obtains for the utility model data and the theory diagram of control interface.

Fig. 4 obtains for the utility model data and the circuit theory diagrams of control interface.

The utility model is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1, be detected object 6 between portable impulse source 5 and detector case 1.Open the power switch of portable impulse source 5, notebook 3 sends " collection " instruction, data are obtained and the electronic switch conducting of control interface 4, start 5 work of portable impulse source, begin charging, discharge after being charged to certain high pressure, electronics is got to positive plate target, emit a beam X-ray pulse, after X ray passed and is detected object 6, detector case 1 obtained being detected the radiation image of object 6.Simultaneously, the synchronizing signal log-on data of portable impulse source 5 is obtained and control

interface

4, and 3 pulses of notice notebook are about to emit.Notebook 3 starts image pick-up card 2 work, gathers the image of being sent here by detector case 1, and the image that will adopt is delivered to notebook 3 more then.The 120-1 type impulse source that portable impulse source 5 can adopt Kedian High Technology Co., Beijing to produce.This impulse source utilizes the direct-flow storage battery charging, has removed heavy high-voltage power supply, and volume is little, and is in light weight, is easy to carry.The utility model also can adopt the impulse source of other model that possesses this characteristic.Each duration of pulse is 50-100 nanosecond, and every pulsed X-ray dosage is about 4 milliroentgens, 1 pulse of the about per second of frequency.There is a charging signals Vc who represents charging process in portion within it, and its magnitude of voltage progressively is increased to about 30 volts, about 1 second of duration of charging by zero.It is 12 volts that this signal is delayed the amplitude of being shaped as, and pulse width is 10 milliseconds numeration signal Vd.In order to obtain synchronizing signal, the utility model has removed numeration signal Vd, and data are obtained and control interface 4 and directly Vc is connected to as synchronizing signal.In addition, 12 volts direct supplys of also having drawn the supply controller power source that main frame comes from control mouth power for the CCD camera the detector case 1.Simultaneously, adopted electronic shutter.The connection of four colored lead-in wires and other parts is in the impulse source control socket:

Red line: from the anode lead-in wire-socket J of the next supply 12V controller power source of impulse source main frame ₂1 pin and the power positive end of video camera 14.

White line: ground wire---camera power supply negative terminal and socket J ₂9 pin.

Green line: the 12V power lead that makes the relay work of impulse source 5---socket J ₂6 pin.

Yellow line: the charging signals Ve of impulse source---socket J ₂5 pin.

Referring to Fig. 2, detector case 1 outside is a detector casing 10, and it can adopt 45 ^#Other metal such as steel or plastics, nonmetallic materials.Video camera 14 passes through support 9 support fixation in detector casing 10.The MTV-1881EX B that video camera 14 can adopt Taiwan Min Tong company to produce.Detector casing 10 is provided with the output signal cable 7 and the power lead 8 of video camera 14.The focal length of video camera 14 front end camera lenses 11 is 6 millimeters, and the aperture index is 1.4.Video camera mirror 11 right detector casing 10 be provided with back up pad 12, back up pad can adopt the light tight flat boards of low-density such as polyvinyl chloride, less to guarantee X-ray is absorbed, its Pasting is fixed on the detector casing 10.X line intensifying screen 13 is arranged on the inside surface of back up pad 12, specifically can adopt non-aggressive, low-density glue.During work, X ray passes back up pad 12 and is incident upon on the intensifying screen 13, and intensifying screen 13 sends visible light, after video camera 14 photographed visible images, exports picture signal to image pick-up card 2 by output signal cable 7.The used intensifying screen 13 of the utility model is good with the high speed intensifying screens of sensitivity more than 400.

Image pick-up card 2 of the present utility model can adopt the meteor black and white card of Canadian metrox company, adopts pci bus, and other A/D slewing rate all can greater than black and white or the coloured image card of 10MB/S.During use, can directly insert the PCI groove of computing machine.Its chief component comprises 8 A/D converters of one tunnel high speed, interface between demoder and digital video and computer PCI bus, itself is not with frame memory, and the A/D slewing rate is greater than 40MHz, and the data after the conversion are directly delivered to internal memory through the pci bus of computing machine.Can connect the input of 4 road videos, switch between four the tunnel during work and gather.The utility model is only imported its excess-three road sky with the first via wherein.

Notebook 3 can adopt the notebook with external expansion cabinet, as the Hengsheng board notebook in Taiwan, dominant frequency is 166MHz, internal memory 32Mb, operating system is Windows95, and data are obtained and control interface 4 is into the Computer I that a goes out/O interface circuit.Insert in the expansion slot 20 of Computer I ESA bus, be made up of synchronizing signal input and electronic switch two parts, its theory diagram is seen Fig. 3.Synchronizing signal will be sent into logic control circuit 18 through electronic switch 15 by the signal of impulse source 5 by socket 21, send into logic control circuit 18 by the instruction that computing machine 3 sends through expansion slot 20.Address decoding 19 joins by address bus and computing machine 3, and address decoding 19 joins with logic control circuit 18.The output of logic control circuit 18 starts trigger 17, and it is logical that electronic switch 16 is sought, then impulse source 5 energized charging.

Referring to Fig. 4, socket 21 is J ₂9 pin ground connection, 5 pin connect the Vc signal of

impulse source

5,1,6 pin connect red line and the green line in impulse source 5 socket controllers respectively, all the other pins are all unsettled.Synchronizing signal is by socket J ₂5 pin inputs, by resistance R ₃Dividing potential drop, when voltage after partial during greater than 2 volts, electronic switch 15 is photoelectricity coupling and device U ₁The level of output is low by hypermutation, is cached in three-state buffer U ₅In, when computing machine 3 sends read port 260h when instruction for comparer U ₁₅" P=Q ", its 19 pin output low level, as: 6,7 of switch S disconnects, and all the other closures are then worked as J ₁When address wire A0～A7 is 60h, comparer U ₁₅Output low level, then Sheffer stroke gate U ₇The output high level is again because expanded slot of computer J ₁A ₅Pin is low, A ₉Pin is high, and the ANE pin is low, makes or door U ₆Be output as low, Sheffer stroke gate U then ₈Be output as height, so Sheffer stroke gate U ₉Output low level.Other is expanded slot of computer J ₁The IOR pin be low, make impact damper U ₃Be output as low, again because Sheffer stroke gate U ₉Output also is low, then impact damper U ₅Allow computer data line D ₀Be low level.The electronic switch part course of work is: computing machine 3 sends write port 260h instruction, and is the same, Sheffer stroke gate U ₉Be output as low, simultaneous computer expansion slot J ₁The IOW pin be low, so just started monostalbe trigger 1 ₇, monostalbe trigger 17 is by U ₁₁, U ₁₂Constitute its U ₁₂Export a positive pulse, through not gate U ₁₃Become negative pulse, electronic switch 16 is photoelectricity coupling and device U ₁₄The output terminal conducting, make the relay of impulse source 5 connect the 12V power supply and start working that impulse source 5 begins charging, by the regulating impulse width, can make impulse source 5 be charged to certain high pressure and emit X ray, the monostalbe trigger U in the present embodiment ₁₁Outer meeting resistance R ₁, capacitor C ₁The width of decision rising edge output signal, monostalbe trigger U ₁₂Outer meeting resistance R ₂, capacitor C ₂Decision output signal width.U ₁₁, U ₁₂Can adopt one 74221 integrated; Photoelectricity coupling and device U ₁, U ₁₄Can adopt integrated an of TLP-521; RP is an exclusion; Comparer U ₁₅Can adopt 74LS688,74LS138 etc.; Impact damper U ₂, U ₃, U ₅Can adopt a slice 74LS125; Sheffer stroke gate U ₇～U ₉Can adopt integrated an of 74LS10; Or door U ₄, U ₆, U ₁₀Can adopt integrated an of 74LS32.

The utility model compared with prior art has following advantage:

1, utilize notebook directly to show, memory image and transmitting image, volume is little, in light weight, Be easy to carry.

2, notebook pci bus speed can guarantee that generally much larger than 42MB/S A/D output data exist Be sent in the notebook process and can not lose.

3, adopt digitizing technique, image taking speed improves nearly two magnitudes than the X ray camera, also falls simultaneously Low cost.

4, adopt ccd video camera, its sensitivity is also far above film, thereby imaging required pulse number can be greatly Reduce.

5, the digitized image dynamic range is higher than film image, and can carry out the processing again of image.

6, aspect medical, utilize computer network, also can realize the strange land expert consultation.

7, the specific targets of this device: imaging area can reach 30cm*40cm, and image pixel number is 768*576, and spatial resolution is less than 1mm, and signal to noise ratio (S/N ratio) is greater than 10.

Claims

1, a kind of making taken formula pulse digit x-ray imaging device, comprise computing machine, x-ray source and detector case (1), it is characterized in that: described x-ray source is portable impulse source (5), described computing machine is the notebook (3) of band expansion cabinet, this notebook (3) obtains by data and control interface (4) is connected with portable impulse source (5), is connected with detector case (1) by image pick-up card (2).

2, portable pulse digit x-ray imaging device as claimed in claim 1, it is characterized in that: described data obtain and control interface (4) comprises electronic switch (15) and (16) that are connected with described portable impulse source (5) by socket (21), the logic control circuit (18) and the address decoding (19) that are connected with described notebook (3) by expanded slot of computer (20), described electronic switch (15) directly is connected with logic control circuit (18), described electronics is opened U.S. (16) and is connected with logic control circuit (18) through trigger (17), and described address decoding (19) also is connected with logic control circuit (18).

3, portable pulse digit x-ray imaging device as claimed in claim 2 is characterized in that: described socket (21) is socket J ₂Described electronic switch (15), (16) are adopted photoelectricity coupling and device U respectively ₁, U ₁₄Described trigger (17) is by the monostalbe trigger U that is connected ₁₁, U ₁₂Constitute monostalbe trigger U ₁₁Input termination logic control circuit (18), monostalbe trigger U ₁₂Output through not gate U ₁₈With photoelectricity coupling and device U ₁₄Join; Described address decoding (19) is by the eight bit comparator U that are connected to switch S and exclusion RP ₁₅Constitute; Described expanded slot of computer (20) is expansion slot J ₁Described logic control circuit (18) comprises and is connected to expanded slot of computer J ₁The impact damper U of IOR end ₈, its output warp or door U ₄Meet impact damper U ₅Control end, impact damper U ₅Output meet expanded slot of computer J ₁D ₀End, impact damper U ₂Input termination expanded slot of computer J ₂IOW end, impact damper U ₂Output through or the door U ₁₀With monostalbe trigger U ₁₁Join, meet expansion slot J ₁Or the door U ₆With comparer U ₁₅Output meet Sheffer stroke gate U respectively ₇, U ₈Input end, Sheffer stroke gate U ₇, U ₈Output through Sheffer stroke gate U ₉Connect or door U ₁₀Input end.