CN2762122Y - Portable flash x-ray inspection tester - Google Patents

Abstract

The utility model relates to a portable flashing X-ray detector which belongs to the technical field of radiation imaging. The utility model is composed of a portable flashing X-ray source, a portable image recorder and a notebook computer. Furthermore, a long integral CCD vidicon is used. Thus, multiple X-ray flashing can be obtained in one image. The utility model has the advantages that the image definition is improved, and the system penetrating power is enhanced. The utility model also has the advantages of small size, light weight, convenient operation and clear image. The utility model is particularly suitable for safety inspection and nondestructive detection in ambulatory places, and can also be used for departments, such as, public security, armed police, customs, etc.

Description

A kind of portable flash X-ray detector

Technical field

The utility model relates to a kind of portable flash X-ray detector, belongs to the radiant image technical field.

Background technology

Portable flash X-ray detector is in safety inspection, and great role has been brought into play in the Non-Destructive Testing field.Portable flash X-ray detector adopts digital imaging technology, can show resulting image in real time, has overcome the shortcoming of conventional film imaging.Simultaneously its volume is little, in light weight, need not the civil power support, in specific application scenario (the row bag in on-fixed place is checked explosive inspection, prohibited items inspection etc.), be traditional large-scale X machine can not compare.

Present widely used portable flash X-ray detector, its flash X-ray image receive mode is: the X ray scintillation screen is converted to visible images with radioscopic image, adopt the PAL-system ccd video camera that visible images is captured, the video image of ccd video camera outputting standard, transfer to notebook through concentric cable, by the PCMCIA image pick-up card that is inserted in notebook video image is converted to digital picture, carries out image and show, storage etc.The portable flash X-ray detector of this structure is owing to adopt the ccd video camera of standard P AL system, and its time shutter is certain, is 20ms.The pulsed frequency in portable flash X-ray source only is about 5Hz.In the piece image of ccd video camera, can only receive an X ray pulse like this.Improve signal noise ratio (snr) of image, can only reach by the multiple image stack, but such effect is not too obvious.The penetration capacity of the system of multiple image stack can not effectively raising the simultaneously.

The utility model has adopted the ccd video camera of long integration (the longest 2s), this ccd video camera has higher number of scanning lines, highly sensitive, and integral time can control, it can receive a plurality of (maximum 15) flash X-ray image in piece image, so just improve the signal to noise ratio (S/N ratio) of image greatly, also improved the penetration capacity of system simultaneously.

Summary of the invention

The utility model purpose is to provide a kind of piece image can receive the portable flash X-ray detector of a plurality of X ray flashes of light.The utility model contains:

The portable flash X-ray source;

The portable image registering instrument, contain:

The registering instrument case;

Scintillation screen is positioned at registering instrument case one side;

Catoptron, it becomes 38 degree angles with scintillation screen;

Ccd video camera, the time shutter can be set according to the object character that will check, and is the longest 2 seconds.It aims at the full visual field of scintillation screen;

Radiographic source and CCD exposure control circuit, the parallel port of its input end and following notebook is interconnected, and output terminal links to each other with the signal input end in above-mentioned Portable X-ray source, and another output terminal links to each other with ccd video camera exposure control end; It contains:

Monostable, its input end links to each other with the START of above-mentioned notebook parallel port;

With door, its input end links to each other with above-mentioned monostable output terminal, and another input end links to each other with the START signal by first reverser; Its output terminal links to each other with ccd video camera exposure control input end by second reverser;

N type triode, its base stage links to each other with the output terminal of door with above-mentioned;

P type triode, its base stage links to each other with the collector of above-mentioned N type triode, and its collector and emitter connects the charge circuit two ends in above-mentioned portable flash X-ray source respectively.

Power circuit, it provides power supply for ccd video camera and radiographic source and CCD exposure control circuit;

The notebook image pick-up card is pcmcia interface, and its input end links to each other with the signal of portable image registering instrument;

Notebook has pcmcia interface and parallel port.Its parallel port links to each other with the signal end of portable image registering instrument.

But the UM101 of this ccd video camera U.S. Uniq Vision company, 201,301,401 4 models.

Evidence, this system makes image definition and penetration capacity improve greatly because ccd video camera adopts long Integral Technology.This somascope volume is little, in light weight, easy to use, and clear picture is particularly suitable for the safety inspection and the Non-Destructive Testing in on-fixed place, can be widely used in departments such as public security, People's Armed Police, customs.

Description of drawings

Fig. 1 is a kind of portable flash X-ray detector structured flowchart.

Fig. 2 is the structural representation of image recorder.

Fig. 3 is radiographic source and CCD exposure control circuit theory diagram.

Fig. 4 is the START signal, the timing diagram between radiographic source charging signals and CCD exposure control signal.

Fig. 5 is the power circuit principle block diagram:

The 5-a:+5V voltage generation circuit,

5-b: voltage comparator circuit,

5-c: power supply status indicating circuit.

Specific implementation

The utility model has designed a kind of novel portable flash X-ray detector, and this somascope is by the portable flash X-ray source, and portable image registering instrument and notebook are formed.Structured flowchart such as Fig. 1.System work process is: setting UM201 type 4 time shutter of ccd video camera is 1 second, it is to set according to the parcel size that will check, provide time width pulse in 1 second by notebook parallel port 5, this pulse is connected the charging circuit in portable flash X-ray source 1, radiographic source sends a plurality of X ray flashes of light, this pulse enable CCD begins exposure simultaneously, and the time shutter is 1 second.X ray passes the scintillation screen that inspected object is got to image recorder, is converted to fluoroscopic image, forms video image in CCD, and notebook PCMCIA image pick-up card 6 is with the video image digitizing.On notebook 7, show the image that was photographed.2 is radiographic source and ccd video camera exposure control circuit among Fig. 1, and 3 is power circuit.Notebook PCMCIA image pick-up card is with the video image digitizing of CCD output, and image pixel is 768 * 576,256 grades of gray scales.This somascope has adopted the ccd video camera of long integration, in piece image, can obtain a plurality of X ray flashes of light, increased the effective quantum number of image so greatly, reduced the quantum noise of image, improved the signal to noise ratio (S/N ratio) of image, make image definition be greatly enhanced, owing to the increase of quantum number, the penetration capacity of system also improves simultaneously.

Fig. 2 is the structural representation of image recorder.Image recorder is made up of X ray scintillation screen 8, catoptron 9, ccd video camera 4, radiographic source and CCD exposure control circuit 2 and power circuit 3.X ray scintillation screen 8 is positioned at a side of registering instrument case 10, catoptron 9 and 38 ° of angles of its folder.Ccd video camera 4 is fixed in the registering instrument case 10, by regulating camera lens, can make the full visual field of camera alignment scintillation screen 8.Radiographic source and CCD exposure control circuit 2 place in the registering instrument case 10, and its input links to each other with four-core joint on the registering instrument case, export an end and link to each other with the signal input end in Portable X-ray source, and another output terminal and the CCD control end that exposes links to each other.Notebook starts x-ray source by radiographic source and CCD exposure control circuit 2, also starts CCD simultaneously and begins exposure.Ccd video camera and each circuit power are powered by power circuit.The inner blacking of image recorder case reduces the scattering of light.

Fig. 3 is radiographic source and CCD exposure control circuit theory diagram.Contain: monostable, its input end links to each other with the START of above-mentioned notebook parallel port; With door, its input end links to each other with above-mentioned monostable output terminal, and another input end links to each other with the START signal by first reverser; Its output terminal links to each other with ccd video camera exposure control input end by second reverser; N type triode, its base stage links to each other with the output terminal of door with above-mentioned; P type triode, its base stage links to each other with the collector of above-mentioned N type triode, and its collector and emitter connects the charge circuit two ends in above-mentioned portable flash X-ray source respectively.

The START signal, sequential relationship such as Fig. 4 between radiographic source charging signals XRAYSRC and the CCD exposure control signal INTGR, when START signal rising edge comes, monostable output becomes high level, but because the designature of START is a low level, so with door output be low level still, have only the START signal to become low level after, export with door and just to become high level.Be that XRAYSC becomes high level, x-ray source is started working, and INTGR becomes low level simultaneously, and ccd video camera begins integration.Width T has promptly determined the time shutter of radiogenic working time and ccd video camera.After the START signal became high level, radiographic source quit work, and ccd video camera also stops integration simultaneously.The effect of sending START signal as shown in Figure 4 by parallel port is the false triggering that causes to system for fear of such as computer starting, shutdown etc.

Fig. 5 is the power circuit principle block diagram.Working battery is 12 volts, the nickel-hydrogen chargeable cell of 4AH.Fig. 5-a is+5 volts of voltage generation circuits, LM7805 chip wherein is converted to 12V+and 5 volts.Fig. 5-b is a voltage comparator circuit, has the voltage comparing function; Fig. 5-c is the power supply status indicating circuit, when cell voltage is higher than 10 volts, and two-color diode Q1 green light, system can operate as normal; And when cell voltage was lower than 10 volts, Q1 glowed, and system can't operate as normal.

This somascope volume is little, in light weight, clear picture, and penetration power is strong.

Claims (2)

1, a kind of portable flash X-ray detector is characterized in that, it contains:

The portable flash X-ray source;

The portable image registering instrument, contain:

The registering instrument case;

Scintillation screen is positioned at registering instrument case one side;

Catoptron, it becomes 38 degree angles with scintillation screen;

Ccd video camera, the time shutter is less than or equal to 2 seconds, its full visual field of alignment lens scintillation screen;

Radiographic source and CCD exposure control circuit, the parallel port of its input end and following notebook is interconnected, and output terminal links to each other with the signal input end in above-mentioned Portable X-ray source, and another output terminal links to each other with ccd video camera exposure control end;

Power circuit, it provides power supply for above-mentioned ccd video camera and radiographic source and CCD exposure control circuit;

The notebook image pick-up card is pcmcia interface, and its input end links to each other with the output signal of above-mentioned portable image registering instrument;

Notebook has pcmcia interface and parallel port, and pcmcia interface links to each other with above-mentioned notebook image collection card output terminal, and the signal end of its parallel port and portable image registering instrument is interconnected.

2, a kind of portable flash X-ray detector according to claim 1 is characterized in that, described radiographic source and CCD exposure control circuit contain:

Monostable, its input end links to each other with the START of above-mentioned notebook parallel port;

With door, its input end links to each other with above-mentioned monostable output terminal, and another input end links to each other with the START signal by first reverser; Its output terminal links to each other with ccd video camera exposure control input end by second reverser;

N type triode, its base stage links to each other with the output terminal of door with above-mentioned;

P type triode, its base stage links to each other with the collector of above-mentioned N type triode, and its collector and emitter connects the charge circuit two ends in above-mentioned portable flash X-ray source respectively.

Images