CN104936366A - Optical path restriction slit structure for preventing X ray leakage and improving imaging quality - Google Patents
Optical path restriction slit structure for preventing X ray leakage and improving imaging quality Download PDFInfo
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- CN104936366A CN104936366A CN201510297703.XA CN201510297703A CN104936366A CN 104936366 A CN104936366 A CN 104936366A CN 201510297703 A CN201510297703 A CN 201510297703A CN 104936366 A CN104936366 A CN 104936366A
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Abstract
The invention discloses an optical path restriction slit structure for preventing X ray leakage and improving imaging quality. The structure comprises a base plate, side plates and enclosing plates, wherein the base plate is provided with a slit, the base plate, the side plates and the enclosing plates are fixed through bolts, and the base plate, the side plates and the enclosing plates are made of steel materials. Through arrangement of the width of the slit and relative arrangement between a light source of X rays and a channel, a ray incident source is controlled, radiation leakage is controlled within a certain scope, the slit has a collimating effect on an optical path, the influence of irrelevant stray light is greatly reduced, the imaging quality of images is improved, the extraction and detection sensitivity of foreign matter signals is improved, the structure has great significance on improvement of the whole-machine performance, at the same time, lead is not used in protection measures, and the technical difficulty, the whole-machine weight and unnecessary lead pollution are reduced.
Description
Technical field
The present invention relates to extraordinary detection field, particularly a kind of light path restriction narrow slit structure preventing X ray leakage and raising image quality.
Background technology
As the extraordinary detection means of one, it is strong that X ray has penetration capacity, due to can detecting object internal structure feature and be widely used in all trades and professions.But due to the naked eyes invisibility of X ray and the irreversibility to human injury, the every country that is applied in of the equipment of X ray has strict administrative provisions and the strict market access limitation.One of them very important index is exactly the restriction of radiation leaks dosage, and at present in the world, except the U.S. limits 5 μ Sv/h, other countries all limit radiation dose leakage rate and are less than 1 μ Sv/h.Equipment a lot of at present adopts lead protection, and so weight not only increasing complete machine, adds the difficulty of process aspect, but also introduces the pollution of virose heavy metal lead.
Closely, the method improving now picture quality mainly contains for the detection sensitivity of special equipment and the relationship between quality of imaging: improve the power of light source, use the higher detector of resolution and the impact reducing scattered light etc. instead.
Summary of the invention
The invention provides a kind of light path restriction narrow slit structure preventing X ray leakage and raising image quality, when using X ray to detect, effectively preventing X ray from revealing; Also serve collimating effect to light path, greatly reduce the impact of irrelevant stray light, improve image image quality, to the extraction of foreign matter signal and the raising of detection sensitivity, and even the raising of overall performance is all significant.
The technical solution used in the present invention is:
Prevent X ray from revealing and improve a light path restriction narrow slit structure for image quality, comprising base plate, side plate and coaming plate, described base plate has slit, described base plate, to be bolted between side plate and coaming plate.
As preferably, described base plate, side plate and plate material are the metal material heavier to radiation absorption of steel or other nonhazardous.
Preferably, when the radiographic source maximum working voltage of transmitting X ray is 80 keV, the thickness of base plate, side plate and coaming plate is at least 16mm; When the radiographic source maximum working voltage of transmitting X ray is 100keV, the thickness of base plate, side plate and coaming plate is at least 20mm; When the radiographic source maximum working voltage of transmitting X ray is 160keV, the thickness of base plate, side plate and coaming plate is at least 40mm.
As preferably, the light source distance that described slot distances sends X ray is L1, the width of the slit of light path restriction narrow slit structure is W1, being used for receiving the X ray distance of carrying out between the linear array detector of imaging and light source is L2, the width of the rectangular perform hole down through X ray of material channel is at least (L2/L1) * W1, and length is conveyer belt width.
Further, that is close to the light source sending X ray above described side plate goes out critical point, is fixed on hollow out on optical branch support below described base plate, and hollow out slit width direction is parallel to conveyer belt direction.
Preferably, described optical branch support has certain tolerance and regulate moving range, ensure the adjustment of light source, slit, rectangular perform hole, hollow out and linear array detector on a vertical line.
Further, below described base plate, material channel is set, the top and bottom of described material channel are provided with material channel top panel slot and material channel lower panel slot, described material channel top panel slot and material channel lower panel slot all use the more weak resin material of radiation absorption or plastic seal, prevent dust from entering cabinet.
The invention has the beneficial effects as follows:
The present invention adopts Steel material to make structure with slit, from the Sources controlling of ray incidence, radiation leaks is controlled in certain scope, the present invention also serves collimating effect to light path, greatly reduce the impact of irrelevant stray light, improve image image quality, to the extraction of foreign matter signal and the raising of detection sensitivity, and even the raising of overall performance is all significant, simultaneously, in safeguard procedures of the present invention, do not use lead, reduce the difficulty of technique, the weight of complete machine and decrease unnecessary lead contamination.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is a kind of light path restriction narrow slit structure cutaway view preventing X ray leakage and raising image quality of the present invention.
Fig. 2 is a kind of light path restriction narrow slit structure schematic diagram preventing X ray leakage and raising image quality of the present invention.
Fig. 3 is the light path geometric representation of conveyer belt transmission direction section of the present invention.
Fig. 4 is the light path geometric representation of vertical conveyors transmission direction section of the present invention.
Fig. 5 is embodiment of the present invention front view.
Fig. 6 is embodiment of the present invention end view.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As depicted in figs. 1 and 2, the present invention discloses a kind of light path restriction narrow slit structure preventing X ray leakage and raising image quality, comprise base plate 100, side plate 102 and coaming plate 103, described base plate 100 has slit 101, described base plate 100, to be bolted between side plate 102 and coaming plate 103, described base plate 100, side plate 102 and coaming plate 103 all use Steel material to make, and are convenient to protect ray.
When the radiographic source maximum working voltage of transmitting X ray is 80 keV, the thickness of base plate 100, side plate 102 and coaming plate 103 is at least 16mm; When the radiographic source maximum working voltage of transmitting X ray is 100keV, the thickness of base plate 100, side plate 102 and coaming plate 103 is at least 20mm; When the radiographic source maximum working voltage of transmitting X ray is 160keV, the thickness of base plate 100, side plate 102 and coaming plate 103 is at least 40mm.
As shown in Figure 3, the light path geometric representation of conveyer belt transmission direction section of the present invention.Send the luminous point emergent ray 200 of the light source of X ray, the beam of ray 200 only has slit 101 position to pass through, remaining is all absorbed by Steel material, beam is successively by the rectangular perform hole 204 in below below the rectangular perform hole of top panel 203 of the hollow out of light source bracing frame 3, material channel, material channel conveyer belt afterwards, finally arrives linear array detector 205.If light source 200 is L1 to the distance of slit 101, the width w1 of slit, light source 200 is to the distance L2 of linear array detector 205, the width of the rectangular perform hole of material channel top panel and the rectangular perform hole of material channel lower panel is at least (L2/L1) * w1, because slit 101 width only has 1 ~ 2mm, and light source is to the distance L1 of slit 101 and detector to the distance L2 of light source, relation L2 approximates 2.5*L1, according to simple geometrical relationship, light source 200 is from the ray of slit 101 outgoing, until be detected the maximum width being parallel to the direction of conveyer belt of device reception also only have 2.5 ~ 5mm, this just requires slit 101, slot 203, slot 204 and hollow out 3 will be aimed at, in order to avoid block ray, two slots 203 up and down of middle material channel, slot 204 can do larger, then with the resin material sealing more weak to radiation absorption, but the width of the photodetector element of linear array detector 205 only has about 1.5mm, it is more difficult to aim at, this just requires slit 101, slot 203, slot 204 and hollow out 3 must be strict aligning point-blank, otherwise ray may be caused to be blocked, even linear array detector 205 cannot receive light.In linear array detector 205, photodetector element is accurately fixed on the complete machine support of the center below material channel conveyer belt below slot 204 afterwards, tries one's best in top.And light source 200 has certain adjustable range relative to slit 101, prevent light source from not aiming at slit.
As shown in Figure 4, slit 101 light path is limited in just can cover linear array detector 205 and conveyer belt width on, make image-capture field cover whole conveyer belt width.
As shown in Figure 5 and Figure 6, X-ray source 200, light path restriction narrow slit structure 101, the supporting construction 3 of light source is placed from top to bottom successively, the ray of X-ray source 200 outgoing of the fan-shaped bright dipping that the angle of divergence is different is in two perpendicular direction through light path restriction narrow slit structure 101, again through light source bracing frame 3, again by after material channel 6, incide ray detector 205, light on conveyer belt direction of transfer is restricted in very narrow scope through light path restriction narrow slit structure 101 by the ray that light source 200 of the present invention sends, to the Qianmen 9 of material channel 6 and enter, the radiation protection difficulty of discharging opening reduces greatly, entering of shown material channel 6, outlet is all hung and is imported and exported plumbous curtain suspension 7, protection ray is revealed.Steel plate protection owing to there is multilayer below linear array detector 205 below conveyer belt 8 does not have problems.Such the present invention adopts and controls from the source of ray, use light path restriction narrow slit structure 101 dexterously, prevent the larger radiation leaks that the ray had nothing to do causes, and collimating effect is served to light path, greatly reduce the impact of irrelevant stray light, improve image image quality, to the extraction of foreign matter signal and the raising of detection sensitivity, and even the raising of overall performance is all significant, moreover owing to avoiding use heavy metal lead in the process, solve the pollution problem carrying out lead in radiation protection with lead in the past, simultaneously, weight and the cost of manufacture decreasing complete machine of the present invention, reduce technology difficulty.
Above-described mode of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (7)
1. prevent X ray from revealing and improve a light path restriction narrow slit structure for image quality, it is characterized in that, comprise base plate, side plate and coaming plate, described base plate has slit, described base plate, to be bolted between side plate and coaming plate.
2. prevent X ray from revealing according to claim 1 and improve the light path restriction narrow slit structure of image quality, it is characterized in that, described base plate, side plate and plate material are the metal material heavier to radiation absorption of steel or other nonhazardous.
3. according to claim 1 or 2, prevent X ray from revealing and improve the light path restriction narrow slit structure of image quality, it is characterized in that, when the radiographic source maximum working voltage of transmitting X ray is 80 keV, the thickness of base plate, side plate and coaming plate is at least 16mm; When the radiographic source maximum working voltage of transmitting X ray is 100keV, the thickness of base plate, side plate and coaming plate is at least 20mm; When the radiographic source maximum working voltage of transmitting X ray is 160keV, the thickness of base plate, side plate and coaming plate is at least 40mm.
4. prevent X ray from revealing according to claim 1 and improve the light path restriction narrow slit structure of image quality, it is characterized in that, the light source distance that described slot distances sends X ray is L1, the width of the slit of light path restriction narrow slit structure is W1, being used for receiving the X ray distance of carrying out between the linear array detector of imaging and light source is L2, the width of the slot down through X ray of material channel is at least (L2/L1) * W1, and length is conveyer belt width.
5. prevent X ray from revealing according to claim 1 and improve the light path restriction narrow slit structure of image quality, it is characterized in that, that is close to the light source sending X ray above described side plate goes out critical point, be fixed on hollow out on optical branch support below described base plate, hollow out Width is parallel to conveyer belt direction.
6. prevent X ray from revealing according to claim 4 and improve the light path restriction narrow slit structure of image quality, it is characterized in that, described optical branch support has certain tolerance and regulate moving range, ensure the adjustment of light source, slit, rectangular perform hole, hollow out and linear array detector on a vertical line.
7. according to claim 1 or 4, prevent X ray from revealing and improve the light path restriction narrow slit structure of image quality, it is characterized in that, below described base plate, material channel is set, the top and bottom of described material channel are provided with the rectangular perform hole of material channel top panel and the rectangular perform hole of material channel lower panel, the rectangular perform hole of described material channel top panel and the rectangular perform hole of material channel lower panel all use the more weak resin material of radiation absorption or plastic seal, prevent dust from entering cabinet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510297703.XA CN104936366A (en) | 2015-06-03 | 2015-06-03 | Optical path restriction slit structure for preventing X ray leakage and improving imaging quality |
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| CN201510297703.XA CN104936366A (en) | 2015-06-03 | 2015-06-03 | Optical path restriction slit structure for preventing X ray leakage and improving imaging quality |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105372268A (en) * | 2015-11-26 | 2016-03-02 | 安徽宜桐机械有限公司 | Leakage device with X-ray effective radiation proof dose |
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| CN205124102U (en) * | 2015-06-03 | 2016-03-30 | 合肥泰禾光电科技股份有限公司 | Prevent that X ray from revealing and improving light path restriction slit structure of image quality |
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| CN101329923A (en) * | 2007-06-21 | 2008-12-24 | 同方威视技术股份有限公司 | Dual-purpose collimating device with seam |
| CN201199235Y (en) * | 2008-05-12 | 2009-02-25 | 丁青 | Novel X-ray channel type safety-check system structure |
| CN202119416U (en) * | 2011-05-16 | 2012-01-18 | 清华大学 | Alignment mechanism used for convexity instrument |
| CN202119732U (en) * | 2011-05-24 | 2012-01-18 | 深圳市鑫源通电子有限公司 | Channel type X-ray security inspector |
| CN103064127A (en) * | 2013-01-04 | 2013-04-24 | 合肥希贝爱斯光电科技有限公司 | Digitization radiography (DR) and liquid spot (LS) and Compton back scattering (CBS) compound type X-ray passageway type security inspection device |
| CN205124102U (en) * | 2015-06-03 | 2016-03-30 | 合肥泰禾光电科技股份有限公司 | Prevent that X ray from revealing and improving light path restriction slit structure of image quality |
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| CN105372268A (en) * | 2015-11-26 | 2016-03-02 | 安徽宜桐机械有限公司 | Leakage device with X-ray effective radiation proof dose |
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Application publication date: 20150923 |
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