CN202102119U - Neutron streaming position survey meter - Google Patents
Neutron streaming position survey meter Download PDFInfo
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- CN202102119U CN202102119U CN201120221701XU CN201120221701U CN202102119U CN 202102119 U CN202102119 U CN 202102119U CN 201120221701X U CN201120221701X U CN 201120221701XU CN 201120221701 U CN201120221701 U CN 201120221701U CN 202102119 U CN202102119 U CN 202102119U
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- Prior art keywords
- camera
- neutron streaming
- scintillation screen
- neutron
- position sensing
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- 238000001514 detection method Methods 0.000 claims description 24
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Abstract
The utility model relates to the neutron streaming positioning technology, particularly to a neutron streaming position survey meter. The neutron streaming position survey meter structurally comprises a scintillation screen used for transforming a neutron image into a visible optical image. Two reflectors are arranged at the rear side of the scintillation screen used for reflecting the visible light to a camera, and the light, reflected by the reflectors, is gathered to a CCD camera via the lens, wherein the two reflectors are in parallel arrangement and form a certain included angle with the scintillation screen; the scintillation screen and a first reflector are arranged inside a detecting head chamber; a second reflector is arranged at the rear end of the detecting chamber; the lens and the CCD camera are arranged inside the camera chamber; and the detecting head chamber, the detecting chamber, and the camera chamber are sequentially connected and are jointly arranged upon a mobile platform. The neutron streaming position survey meter, with modularization design, can meet the space requirement of various measuring environments and substantially raise the positioning efficiency and security.
Description
Technical field
The utility model relates to the neutron streaming location technology, is specifically related to a kind of neutron streaming position sensing appearance.
Background technology
The neutron streaming intensity that reactor channel is drawn very big (10
5-10
10N/cm
2), therefore need accurately locate its flight path.Traditional detector that is used to locate neutron streaming has only position sensitive detector and hand-held neutron probe and film imaging.The position sensitive detector advantage is that beam intensity sensitivity is very high, but owing to receive electronics and the influence of measuring the dead time, can only measure＜10
5N/cm
2Neutron flux, optimal spatial is differentiated to be had only about 2mm.Commercial hand-held neutron probe is mainly used in the position of acquisition environment scattered neutron; Its advantage is the position (neutron is beaten on test surface just luminous) of visual neutron current very intuitively; But owing to receive handle restriction (15cm); Proximity detection intense beam stream will be abnormally dangerous, and regional limited (the about 3-5cm of size) of imaging.The method of film imaging is the most accurately differentiated can reach 0.1mm, but need carry out about 1 hour exposure and development time, and under the condition of unknown of therefore concrete beam position, location efficiency is lower.
The utility model content
The purpose of the utility model is the defective to prior art, provides a kind of CCD of employing neutron imaging method to come in real time the accurately detection instrument of the sub-line of location persistent erection, thereby significantly improves the efficient and the security of location.
The technical scheme of the utility model is following: a kind of neutron streaming position sensing appearance; Comprise the scintillation screen that is used for sub-image is changed into visible image; The scintillation screen rear side is provided with the catoptron that is used for visible light is refracted to camera, and the light of catoptron refraction converges to the CCD camera through camera lens, wherein; Described catoptron has two, and two catoptrons laterally arrange and form certain included angle with scintillation screen; The scintillation screen and first catoptron are arranged to be surveyed in the head cavity, and second catoptron is arranged on the rear end of detection cavity, and camera lens and CCD camera are positioned at the camera chamber; Detection head cavity, detection cavity, camera chamber connect in order, and are co-located on the mobile platform.
Further, aforesaid neutron streaming position sensing appearance wherein, between described detection head cavity and the detection cavity, and all is fastened and connected through groove and tongue between detection cavity and the camera chamber each other.
Further, aforesaid neutron streaming position sensing appearance wherein, all is 45 ° of angles between two catoptrons and the scintillation screen.
Further, aforesaid neutron streaming position sensing appearance wherein, surrounds with stereotype around the described CCD camera.
Further; Aforesaid neutron streaming position sensing appearance, wherein, described mobile platform comprises horizontal translation platform and vertical translation platform; Detection head cavity after the connection, detection cavity and camera chamber are arranged on the horizontal translation platform, and the horizontal translation platform is arranged on the vertical translation platform.
Further, aforesaid neutron streaming position sensing appearance, wherein, described horizontal translation platform adopts the form of driven by motor leading screw to carry out transmission; Described vertical translation platform is by constituting through mutual cross-coupled two bracing frames of rotating shaft; Bracing frame be respectively equipped with top board and base plate up and down; The bottom of two bracing frames is connected with rotating mode with base plate respectively; Being provided with motor-driven leading screw in the bottom surface of top board, realizes being threaded with leading screw in the top of one of them bracing frame.
The beneficial effect of the utility model is following: the neutron streaming locating device that the utility model provided is the basis with CCD neutron imaging technology, is aided with the movable base of two dimension again, can be to 10
5N/cm
2Above neutron flux is measured, and bearing accuracy can reach 0.1mm, and the investigative range size can reach 15cm, and the time shutter was satisfied the in real time accurate positioning requirements of neutron intense beam stream fully in 1 minute.Whole device uses modular design, can satisfy the space requirement of different measuring environment.
Description of drawings
Fig. 1 is the schematic diagram of neutron streaming position sensing appearance;
Fig. 2 is the structural representation of neutron streaming position sensing appearance;
Fig. 3-1, Fig. 3-2, Fig. 3-3 are the multiple assembling mode synoptic diagram of neutron streaming position sensing appearance.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is carried out detailed description.
The principle of neutron streaming position sensing appearance is as shown in Figure 1; Neutron streaming shines on the scintillation screen 1, and scintillation screen 1 changes into visible image with middle sub-image, and scintillation screen 1 rear side is provided with the catoptron that is used for visible light is refracted to camera; Described catoptron has two; Two catoptrons 2,3 laterally arrange and form certain included angle with scintillation screen, and twice refraction can greatly reduce background, and the light of catoptron 2,3 refractions converges to CCD camera 5 through camera lens 4.
The concrete structure of neutron streaming position sensing appearance is as shown in Figure 2, and the scintillation screen 1 and first catoptron 2 are arranged to be surveyed in the head cavity 10, and second catoptron 3 is arranged on the rear end of detection cavity 20, and camera lens 4 is positioned at camera chamber 30 with CCD camera 5; Detection head cavity 10, detection cavity 20, camera chamber 30 connect in order, and are co-located on the mobile platform.The framework of three cavitys is the aluminium alloy extrusions of 2cm*2cm, and the thick aluminium skin of 1mm is coverd with on the surface.Being interlocked with tongue by the aluminum square groove between cavity is connected, and is convenient to modularization like this and builds.
Second catoptron, 3 sizes are identical with first catoptron 2 with effect.Be fixed on equally on the plane with 1 one-tenth 45 of scintillation screen.The design of two catoptrons can be lowered the influence of γ radiation background to camera greatly.
On the electronic horizontal translation platform that whole detection cavity is fixed on and can accurately locatees, stroke is 40cm, use web joint to connect, the horizontal translation platform adopts the form of driven by motor leading screw to carry out transmission.On the electronic vertical translation platform that the horizontal translation platform is fixed on and can accurately locatees, stroke is 20cm.The vertical translation platform is by constituting through mutual cross-coupled two bracing frames of rotating shaft; Bracing frame be respectively equipped with top board and base plate up and down; The bottom of two bracing frames is connected (as connecting through rotating shaft) with base plate with rotating mode respectively; Be provided with motor-driven leading screw in the bottom surface of top board, the top of one of them bracing frame and leading screw are realized being threaded, and change the distance between the bracing frame that the top board bottom surface intersects through motor-driven; Realize that the angle between the cross brace changes, thereby change the height of translation stage.
Because the utility model uses modular design, can realize different assembling modes like this, satisfies the requirement of different measurement environment to the space.Exemplary package assembly is not limited to represented assembling mode in above-mentioned three width of cloth accompanying drawings certainly shown in Fig. 3-1, Fig. 3-2, Fig. 3-3.Various assemblings can realize that operation is very easy through the mutual fastening of groove and tongue.
The calculating of the utility model Measuring Time is following:
The photon number that tested neutron produces on chip is:
n
pe＝η
0gη
Leη
CCDn
e/[4F(m+1)]
2/5＝3.3*10
5/[4F(m+1)]
2/5＝60
Wherein:
η
0gTwo specularly reflected rates get 0.82;
η
LeThe lens transmissivity gets 0.98;
η
CCDThe CCD quantum effect gets 0.9;
n
eScintillation screen absorbs the photon number that neutron sends in 4 π directions, gets 4.53*10
5
The F focal length of lens/diameter gets 1.8;
M minification (l
Obj/ l
CCD=m) get 100/27.6.
Photon number/the s of each pixel is on the CCD chip: Npe=I * D
2* η
S* n
Pe/ pixel/s
Wherein,
I is the line neutron flux, with 10
6N/cm
2/ s is an example;
The scintillation screen area size that D measures for each pixel is example with 10cm/1024;
η
SBeing the scintillation screen detection efficiency, is example with 15%;
Then on the CCD chip p.s. each pixel photon number Npe=860.Consider that every pictures pixel needs about 2000 countings, need 5 same pictures to carry out noise abatement and handle.So an experiment measuring time only needs 2000/860*5=12 second.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technology thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.
Claims (8)
1. neutron streaming position sensing appearance; Comprise the scintillation screen (1) that is used for sub-image is changed into visible image; Scintillation screen (1) rear side is provided with the catoptron (2,3) that is used for visible light is refracted to camera; The light of catoptron refraction converges to CCD camera (5) through camera lens (4), and it is characterized in that: described catoptron has two, and two catoptrons (2,3) laterally arrange and form certain included angle with scintillation screen (1); Scintillation screen (1) and first catoptron (2) are arranged to be surveyed in the head cavity (10), and second catoptron (3) is arranged on the rear end of detection cavity (20), and camera lens (4) and CCD camera (5) are positioned at camera chamber (30); Detection head cavity (10), detection cavity (20), camera chamber (30) connect in order, and are co-located on the mobile platform.
2. neutron streaming position sensing appearance as claimed in claim 1 is characterized in that: between described detection head cavity (10) and the detection cavity (20), and all be fastened and connected each other through groove and tongue between detection cavity (20) and camera chamber (30).
3. according to claim 1 or claim 2 neutron streaming position sensing appearance is characterized in that: all be 45 ° of angles between two catoptrons (2,3) and the scintillation screen (1).
4. neutron streaming position sensing appearance as claimed in claim 1 is characterized in that: surround with stereotype around the described CCD camera.
5. neutron streaming position sensing appearance as claimed in claim 1; It is characterized in that: described mobile platform comprises horizontal translation platform (6) and vertical translation platform (7); Detection head cavity after the connection, detection cavity and camera chamber are arranged on the horizontal translation platform (6), and horizontal translation platform (6) is arranged on the vertical translation platform (7).
6. neutron streaming position sensing appearance as claimed in claim 5 is characterized in that: described horizontal translation platform (6) adopts the form of driven by motor leading screw to carry out transmission.
7. neutron streaming position sensing appearance as claimed in claim 5; It is characterized in that: described vertical translation platform (7) is by constituting through mutual cross-coupled two bracing frames of rotating shaft; Bracing frame be respectively equipped with top board and base plate up and down; The bottom of two bracing frames is connected with rotating mode with base plate respectively, is provided with motor-driven leading screw in the bottom surface of top board, realizes being threaded with leading screw in the top of one of them bracing frame.
8. neutron streaming position sensing appearance as claimed in claim 1 is characterized in that: described scintillation screen (1) is Li
6F or ZnS material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120221701XU CN202102119U (en) | 2011-06-28 | 2011-06-28 | Neutron streaming position survey meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120221701XU CN202102119U (en) | 2011-06-28 | 2011-06-28 | Neutron streaming position survey meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202102119U true CN202102119U (en) | 2012-01-04 |
Family
ID=45388124
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120221701XU Expired - Fee Related CN202102119U (en) | 2011-06-28 | 2011-06-28 | Neutron streaming position survey meter |
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| Country | Link |
|---|---|
| CN (1) | CN202102119U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279409A (en) * | 2011-06-28 | 2011-12-14 | 中国原子能科学研究院 | Neutron Beam Position Detector |
| CN109884094A (en) * | 2019-04-09 | 2019-06-14 | 北京中百源国际科技创新研究有限公司 | A kind of neutron non-destructive testing device |
-
2011
- 2011-06-28 CN CN201120221701XU patent/CN202102119U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279409A (en) * | 2011-06-28 | 2011-12-14 | 中国原子能科学研究院 | Neutron Beam Position Detector |
| CN102279409B (en) * | 2011-06-28 | 2013-06-12 | 中国原子能科学研究院 | Neutron Beam Position Detector |
| CN109884094A (en) * | 2019-04-09 | 2019-06-14 | 北京中百源国际科技创新研究有限公司 | A kind of neutron non-destructive testing device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Dongfeng Inventor after: Wei Guohai Inventor after: Wu Liqi Inventor after: Li Junhong Inventor after: Xiao Hongwen Inventor after: Li Meijuan Inventor after: Wu Zhanhua Inventor after: Liu Yuntao Inventor after: He Linfeng Inventor after: Wang Hongli Inventor after: Han Songbai Inventor after: Hao Lijie Inventor after: Wu Meimei Inventor after: Sun Kai Inventor after: Wang Yu Inventor before: He Linfeng Inventor before: Wu Liqi Inventor before: Han Songbai Inventor before: Wang Hongli Inventor before: Hao Lijie Inventor before: Wu Meimei Inventor before: Wang Yu Inventor before: Wei Guohai Inventor before: Chen Dongfeng Inventor before: Liu Yuntao |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HE LINFENG HAN SONGBAI WANG HONGLI HAO LIJIE WU MEIMEI WANG YU WEI GUOHAI CHEN DONGFENG LIU YUNTAO WU LIQI TO: CHEN DONGFENG LIU YUNTAO HE LINFENG WANG HONGLI HAN SONGBAI HAO LIJIE WU MEIMEI SUN KAI WANG YU WEI GUOHAI WU LIQI LI JUNHONG XIAO HONGWEN LI MEIJUAN WU ZHANHUA |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20140628 |
|
| EXPY | Termination of patent right or utility model |