CN206420798U - A kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis - Google Patents
A kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis Download PDFInfo
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- CN206420798U CN206420798U CN201720026698.3U CN201720026698U CN206420798U CN 206420798 U CN206420798 U CN 206420798U CN 201720026698 U CN201720026698 U CN 201720026698U CN 206420798 U CN206420798 U CN 206420798U
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- dimensional calibration
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Abstract
The utility model provides a kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis.The three-dimensional calibration measurement apparatus coordinates sample stage multifreedom motion first with spatial digitizer, and the scan image for the sample being positioned on sample stage is collected in computer, the threedimensional model of sample is set up.Then subnetting processing is carried out to threedimensional model, and unique mark is assigned to each grid.Manually or automatically pattern optional target gridding on threedimensional model, by the motion control program control sample stage motion installed in a computer, so that entrance slit is directed at the target gridding, simultaneously, diffraction pattern, collimater and neutron detector are moved to relevant position, neutron source given-ioff neutron beam, starts neutron diffraction stress measurement.Three-dimensional calibration measurement apparatus can realize the accurate three-dimensional calibration to sample, low to space requirement, it is not necessary to extra reference for installation spot light, it is to avoid introduce extra error, the positioning precision of test sample is up to 100 μm.
Description
Technical field
The utility model belongs to the neutron diffraction in-situ technique field of material structure and performance, and in particular to Yi Zhongyong
In the three-dimensional calibration measurement apparatus of neutron diffraction stress analysis.
Background technology
Mispairing/non-compatibility of the internal stress originating from material internal different zones or phase.Filled from materials synthesis to engineering
Each standby link may introduce internal stress.It is also referred to as remaining to answer due to being the residual action after applied load is cancelled
Power.Understand and control residual stress is engineering material research and development and the prerequisite applied.Neutron diffraction stress analysis technique is simultaneously
Engineering Oriented is applied and basic research.The technology is similar with X-ray analysis method, is to be calculated to answer according to the displacement of diffraction maximum
Become, be then converted to stress result.The latter is contrasted, neutron has substantially excellent in terms of penetration depth and differentiation adjacent element
Gesture, can meet the demand of integrated testability, be adapted to the internal stress of test large volume material in irregular shape or component.There is provided simultaneously can
The spatial discrimination of tune, it is allowed to the flexible operating of sample, the change of internal stress under environment loading environment can be monitored.Industry is generally recognized
It is the unique technical means of current polycrystalline material interior three-dimensional stress Non-Destructive Testing for neutron diffraction analsysis technology.In recent years, with
Going deep into for engineering and the increase of materials science applications demand and people's understanding, many neutron scattering experiment rooms set up it is special in
Sub- diffraction stress analysis spectrometer, neutron diffraction stress analysis technique is just received more and more attention.The technology belongs to accurate real
Technology category is tested, the positioning for being tested component or sample is most important, if deviation occurs for positioning, the consequence caused is neutron streaming
Inciding the region of sample surfaces will shift, and in turn result in experimental result inaccurate.In order to overcome this drawback, generally adopt
Neutron incoming position is determined with three-dimensional localization techniques.Traditional three-dimensional laser/infrared location technology needs three spot lights to provide
Origin reference location light, the mounting arrangement of three spot lights there are certain requirements to test sample surrounding space.If neutron diffraction should
The angle of departure of power spectrometer changes, and the position of spot light will also make corresponding adjustment, be readily incorporated extra error.
Currently, a kind of high-precision three-dimensional calibration measurement apparatus for neutron diffraction stress analysis is needed badly.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of three-dimensional calibration for neutron diffraction stress analysis
Measurement apparatus.
Three-dimensional calibration measurement apparatus of the present utility model for neutron diffraction stress analysis, is characterized in, described three
Dimension calibration measurement apparatus includes spatial digitizer, sample stage, computer, entrance slit, diffraction pattern, collimater and neutron detection
Device；
Sample is placed on described sample stage, and the neutron ray of neutron source transmitting is incident to sample through entrance slit, spreads out
Neutron ray after penetrating is incident to after collimater along diffraction pattern to be received by neutron detector, and entrance slit and diffraction pattern are in cloth
Glug angle is arranged；Described spatial digitizer scanning sample, and scan image is transmitted to computer；Described computer control
Sample stage is moved, and changes the measurement point position of the sample of spatial digitizer scanning, passes through the neutron diffraction stress point in computer
Analysis module realizes the three-dimensional calibration measurement of the neutron diffraction stress analysis of sample.
Described spatial digitizer includes optical grating projection instrument, video camera I and video camera II, optical grating projection instrument transmitting grating beam
To sample, the scan image of sample is obtained by the complementary measurement of video camera I and video camera II.
Described sample stage is four-degree-of-freedom motion, and sample is driven in X, Y, Z-direction motion and level by motor
Rotation.
Communication between described spatial digitizer and computer is used in optical-fibre communications, serial communication or ethernet communication
One kind.
Communication between described sample stage and computer is using one kind in serial communication or ethernet communication.
Described entrance slit and the rectangular window that diffraction pattern window size scope is 0mm × 0mm to 20mm × 100mm
Mouthful.
Described collimater is one kind in radially aligned device or Soller collimaters.
In the detector array architecture that the structure of described neutron detector constitutes for multiwire proportional chamber structure or 3He pipes
It is a kind of.
Described neutron source is one kind in pile neutron source, pulsed reactor neutron source or spallation neutron target.
The course of work of three-dimensional calibration measurement apparatus of the present utility model for neutron diffraction stress analysis is as follows：First
Coordinate the multifreedom motion of sample stage using spatial digitizer, the appearance information for the sample being positioned on sample stage is collected
In computer, scan image is obtained, the threedimensional model of sample is set up.Then subnetting processing is carried out for the threedimensional model, and it is right
Each grid assigns unique mark.Followed by manually or automatically pattern on threedimensional model an optional target gridding, borrow
Help the motion control program control sample stage motion installed in a computer so that entrance slit is directed at the target gridding, meanwhile,
Diffraction pattern, collimater and neutron detector are moved to the position of Bragg angle, open the neutron streaming switch of neutron source, transmitting
Go out neutron ray, start neutron diffraction stress measurement.By the movement of sample stage, neutron diffraction stress spectrometer is by the every of sample
One small area completes stress distribution detection, and integration processing obtains stress value.Finally, the threedimensional model of sample is surveyed with it
The stress value for trying region is corresponded, and realizes stress distribution Three-dimensional Display.It is of the present utility model to be used for neutron diffraction stress analysis
The advantage of three-dimensional calibration measurement apparatus be that operating personnel are not required to GPRS image procossing, the phase of the multiple fields such as optical alignment
Close knowledge, it is only necessary to grasp spectrometer operational process.Three-dimensional calibration of the present utility model for neutron diffraction stress analysis is surveyed
The Sample location precision for the neutron diffraction stress measurement experiment that device is carried out is measured up to 100 μm, is reduced because manual operation is brought
Sample location error.
The operation principle of spatial digitizer is the grating fringe that coding is projected using optical grating projection instrument, is synchronously triggered into certain
The video camera I and video camera II of angle work, and gather the grating fringe after the corresponding modulation by scanned object surface topography,
The cloud data of sample surfaces are mutually obtained by solution, sample surface profiles are presented in the form of coordinate.Every time by video camera I and taking the photograph
Camera II obtains the data in two public area of visual field, for the data in the different visuals field, generally uses and measures public area twice
The common reference point in domain, and data splicing is realized that data coordinates are unified.Data acquiring mode based on structure light image, collection
Speed is fast, is especially suitable for data acquisition and the analysis of Irregular Boundary Surface.Pass through the IMAQ of the complete paired samples of spatial digitizer
After, three-dimensional modeling is completed in computer.Threedimensional model is placed in coordinate system, and each test point is endowed unique coordinate.
When being measured using spatial digitizer, the physics centering wasted time and energy to sample without supplementary means.Behaviour
The position and direction that author need to only lay sample tell computer by certain measurement and operation, just can realize quick and smart
True mathematics centering.By measuring the coordinate of each measurement point on reference element, computer is counted accordingly to data
Handle, it is possible to determines the Benchmark System of sample.Under the Benchmark System, then measure the point on actual tested element,
Then calculated and just obtain actual measurement result.Above-mentioned mathematics centering, exactly sets up the process of sample coordinate system.Correctly
Sample coordinate system of setting up quickly and accurately measure that work is most important for guarantee, otherwise this may result in mistake
Measurement result.
Neutron diffraction stress spectrometer obtains sample interior stress distribution situation by the way of blanket type sweep test.It is first
First, the threedimensional model for having collected the sample in computer, using mouse in its surface arbitrarily one region of selection（It is false
If plane domain size is 2mm × 2mm）As starting test zone, linked by control system, neutron ray will be directed at the area
Domain is tested.Then, since selected starting test zone, control test zone is moved along X/Y/Z directions successively, is coordinated
The rotation of sample stage, can be achieved the full surface scan to sample.Obtained stress data is pre-processed, that is, is translated into
Form and numerical value that neutron diffraction stress analysis module in computer can be recognized.By data inversion, stress is finally obtained
Distributed image.
Three-dimensional calibration measurement apparatus of the present utility model for neutron diffraction stress analysis, its core component includes one
Sample stage and a high-precision three-dimensional scanner with multifreedom motion ability, the two is used cooperatively, it is possible to achieve to sample
The accurate three-dimensional calibration of product, three-dimensional calibration measurement apparatus is low to space requirement, it is not necessary to extra reference for installation spot light, it is to avoid
Extra error is introduced, to the positioning precision of test sample up to 100 μm.
Brief description of the drawings
Fig. 1 is the three-dimensional structural representation for calibrating measurement apparatus of the present utility model for neutron diffraction stress analysis；
Fig. 2 is the spatial digitizer in the three-dimensional calibration measurement apparatus of the present utility model for neutron diffraction stress analysis
Structural representation.
In figure, the diffraction pattern of 1. spatial digitizer, 2. sample stage, 3. computer, 4. entrance slit, 5. sample 6.
7. the video camera II of 10. video camera of collimater 8. neutron detector, 9. optical grating projection instrument I 11..
Dotted line in figure represents neutron ray.
Embodiment：
The utility model is described in further details below in conjunction with the accompanying drawings.
As shown in Figure 1, 2, the three-dimensional calibration measurement apparatus of the present utility model for neutron diffraction stress analysis includes three
Tie up scanner 1, sample stage 2, computer 3, entrance slit 4, diffraction pattern 6, collimater 7 and neutron detector 8；
Sample 5 is placed on described sample stage 2, and the neutron ray of neutron source transmitting is incident to sample through entrance slit 4
5, the neutron ray after diffraction is incident to after collimater 7 along diffraction pattern 6 to be received by neutron detector 8, entrance slit 4 and diffraction
Slit 6 is arranged in Bragg angle；The described scanning sample 5 of spatial digitizer 1, and scan image is transmitted to computer 3；It is described
Computer 3 control sample stage 2 move, change spatial digitizer 1 scan sample 5 measurement point position, by computer 3
Neutron diffraction stress analysis module realize sample 5 neutron diffraction stress analysis three-dimensional calibration measurement.
Described spatial digitizer 1 includes optical grating projection instrument 9, video camera I 10 and video camera II 11, and optical grating projection instrument 9 is sent out
Grating beam is penetrated to sample 5, the scan image of sample 5 is obtained by the complementary measurement of video camera I 10 and video camera II 11.
Described sample stage 2 is four-degree-of-freedom motion, and sample 5 is driven in X, Y, Z-direction motion and water by motor
Flat rotation.
Communication between described spatial digitizer 1 and computer 3 uses optical-fibre communications, serial communication or ethernet communication
In one kind.
Communication between described sample stage 2 and computer 3 is using one kind in serial communication or ethernet communication.
Described entrance slit 4 and the rectangular window that the window size scope of diffraction pattern 6 is 0mm × 0mm to 20mm × 100mm
Mouthful.
Described collimater 7 is one kind in radially aligned device or Soller collimaters.
In the detector array architecture that the structure of described neutron detector 8 constitutes for multiwire proportional chamber structure or 3He pipes
One kind.
Described neutron source is one kind in pile neutron source, pulsed reactor neutron source or spallation neutron target.
Embodiment 1
The course of work of three-dimensional calibration measurement apparatus of the present utility model for neutron diffraction stress analysis is as follows：First
Coordinate the multifreedom motion of sample stage using spatial digitizer, the appearance information for the sample being positioned on sample stage is collected
In computer, scan image is obtained, the threedimensional model of sample is set up.Then subnetting processing is carried out for the threedimensional model, and it is right
Each grid assigns unique mark.Followed by manually or automatically pattern on threedimensional model an optional target gridding, borrow
Help the motion control program control sample stage motion installed in a computer so that entrance slit is directed at the target gridding, meanwhile,
Diffraction pattern, collimater and neutron detector are moved to the position of Bragg angle, open the neutron streaming switch of neutron source, transmitting
Go out neutron ray, start neutron diffraction stress measurement.By the movement of sample stage, neutron diffraction stress spectrometer is by the every of sample
One small area completes stress distribution detection, and integration processing obtains stress value.Finally, the threedimensional model of sample is surveyed with it
The stress value for trying region is corresponded, and realizes stress distribution Three-dimensional Display.It is of the present utility model to be used for neutron diffraction stress analysis
The advantage of three-dimensional calibration measurement apparatus be that operating personnel are not required to GPRS image procossing, the phase of the multiple fields such as optical alignment
Close knowledge, it is only necessary to grasp spectrometer operational process.Three-dimensional calibration of the present utility model for neutron diffraction stress analysis is surveyed
The Sample location precision for the neutron diffraction stress measurement experiment that device is carried out is measured up to 100 μm, is reduced because manual operation is brought
Sample location error.
Three embodiments, three samples, three rectangle minimums arrive maximum 20*100, the equipment and equipment knot for arranging in pairs or groups different
Structure, draws three precision within 100 μm.
The not selection of relation precision, is directly write as " can also be using serial communication or ethernet communication " later.
Embodiment 2
The present embodiment and the embodiment of embodiment 1 are essentially identical, and the main distinction is, sample 2, rectangle 2, different sets
Standby and device structure, draws the precision 2 within 100 μm.
Embodiment 3
The present embodiment and the embodiment of embodiment 1 are essentially identical, and the main distinction is, sample 2, rectangle 2, different sets
Standby and device structure, draws the precision 2 within 100 μm.
Claims (8)
1. a kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis, it is characterised in that described three-dimensional calibration is surveyed
Measuring device includes spatial digitizer（1）, sample stage（2）, computer（3）, entrance slit（4）, diffraction pattern（6）, collimater（7）
And neutron detector（8）；
Sample（5）It is placed on described sample stage（2）On, the neutron ray of neutron source transmitting is through entrance slit（4）It is incident to sample
Product（5）, neutron ray after diffraction is along diffraction pattern（6）It is incident to collimater（7）Afterwards by neutron detector（8）Receive, it is incident
Slit（4）And diffraction pattern（6）Arranged in Bragg angle；Described spatial digitizer（1）Scan sample（5）, and by scanning figure
As transmitting to computer（3）；Described computer（3）Control sample stage（2）It is mobile, change spatial digitizer（1）The sample of scanning
Product（5）Measurement point position, pass through computer（3）In neutron diffraction stress analysis module realize sample（5）Neutron diffraction
The three-dimensional calibration measurement of stress analysis.
2. the three-dimensional calibration measurement apparatus according to claim 1 for neutron diffraction stress analysis, it is characterised in that：Institute
The spatial digitizer stated（1）Including optical grating projection instrument（9）, video camera I（10）With video camera II（11）, optical grating projection instrument（9）Hair
Grating beam is penetrated to sample（5）, pass through video camera I（10）With video camera II（11）Complementary measurement obtain sample（5）Scanning figure
Picture.
3. the three-dimensional calibration measurement apparatus according to claim 1 for neutron diffraction stress analysis, it is characterised in that：Institute
The sample stage stated（2）For four-degree-of-freedom motion, sample is driven by motor（5）In X, Y, Z-direction motion and horizontal rotation.
4. the three-dimensional calibration measurement apparatus according to claim 1 or 2 for neutron diffraction stress analysis, its feature exists
In：Described spatial digitizer（1）With computer（3）Between communication use optical-fibre communications, serial communication or ethernet communication
In one kind.
5. being used for the three-dimensional calibration measurement apparatus of neutron diffraction stress analysis according to claim 1 or 3, its feature exists
In：Described sample stage（2）With computer（3）Between communication using one kind in serial communication or ethernet communication.
6. the three-dimensional calibration measurement apparatus according to claim 1 for neutron diffraction stress analysis, it is characterised in that：Institute
The entrance slit stated（4）And diffraction pattern（6）Window size scope is 0mm × 0mm to 20mm × 100mm rectangular window.
7. the three-dimensional calibration measurement apparatus according to claim 1 for neutron diffraction stress analysis, it is characterised in that：Institute
The collimater stated（7）For one kind in radially aligned device or Soller collimaters.
8. the three-dimensional calibration measurement apparatus according to claim 1 for neutron diffraction stress analysis, it is characterised in that：Institute
The neutron detector stated（8）The detector array architecture that is constituted for multiwire proportional chamber structure or 3He pipes of structure in one kind.
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| CN201720026698.3U CN206420798U (en) | 2017-01-11 | 2017-01-11 | A kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis |
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| CN201720026698.3U CN206420798U (en) | 2017-01-11 | 2017-01-11 | A kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770402A (en) * | 2017-01-11 | 2017-05-31 | 中国工程物理研究院核物理与化学研究所 | A kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis |
| CN111474192A (en) * | 2020-03-24 | 2020-07-31 | 上海交通大学 | Neutron diffraction measurement method and system for tracking second-order stress distribution of specific orientation |
-
2017
- 2017-01-11 CN CN201720026698.3U patent/CN206420798U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770402A (en) * | 2017-01-11 | 2017-05-31 | 中国工程物理研究院核物理与化学研究所 | A kind of three-dimensional calibration measurement apparatus for neutron diffraction stress analysis |
| CN106770402B (en) * | 2017-01-11 | 2023-08-04 | 中国工程物理研究院核物理与化学研究所 | Three-dimensional calibration measuring device for neutron diffraction stress analysis |
| CN111474192A (en) * | 2020-03-24 | 2020-07-31 | 上海交通大学 | Neutron diffraction measurement method and system for tracking second-order stress distribution of specific orientation |
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