CN104914118A - System for measuring displacement field in reconstructed material component based on CT - Google Patents
System for measuring displacement field in reconstructed material component based on CT Download PDFInfo
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- CN104914118A CN104914118A CN201510313932.6A CN201510313932A CN104914118A CN 104914118 A CN104914118 A CN 104914118A CN 201510313932 A CN201510313932 A CN 201510313932A CN 104914118 A CN104914118 A CN 104914118A
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Abstract
The invention discloses a system for measuring a displacement field in a reconstructed material component based on CT. The system comprises an experiment platform, a CT machine main body, a to-be-measured material component, iron sand particles, a substance identification and image processing computer, a control computer matched with a CT machine, a CT machine display control platform and a data analysis computer, wherein the CT machine is used for acquiring CT scanning data of the to-be-measured material component; the substance identification and image processing computer is used for carrying out three-dimensional reconstruction on the CT scanning data of the to-be-measured material component to obtain a three-dimensional position distribution diagram of iron sand particles of each moment; and the data analysis computer is used for carrying out image processing on the three-dimensional position distribution diagram of the iron sand particles, carrying out whole-field matching on positions of all the iron sand particles at different phases, and determining the position change of all the iron sand particles at the different moments to form the whole displacement field. The measurement system is simple to operate and has high precision; the influences on the mechanical property of the to-be-measured material component are small and the measurement of the whole displacement field in the material component is realized.
Description
Technical field
The present invention relates to a kind of measuring system of material members internal displacement field, be specifically related to a kind of measuring system based on CT reconstruction biomaterials component inside displacement field.
Background technology
Social production and life activity all be unable to do without by the application of various material, and these materials of scientific and reasonable application be unable to do without the research of the mechanical property to these materials.The measurement of material members internal displacement field is an important content in material mechanical performance research, therefore measures material members internal displacement field and has great importance.
The method of current measurement material members internal displacement measures internal displacement mainly with burying displacement measurement probe underground, these class methods are contact type measurement, can only obtain material members some measuring point place inner displacement and be difficult to obtain the Displacements Distribution of the material internal whole audience, troublesome poeration, measuring point probe layout can affect the mechanical property of detected materials component.
Summary of the invention
For the deficiency that prior art exists, the object of the invention is to provide a kind of measuring system based on CT reconstruction biomaterials component inside displacement field, non-contact measurement, simple to operate, result lasting accuracy is high, little to the Effect on Mechanical Properties of measured material component, achieves the measurement of the inner whole displacement field of material members.
To achieve these goals, the present invention realizes by the following technical solutions:
A kind of measuring system based on CT reconstruction biomaterials component inside displacement field of the present invention, comprise experiment table, be arranged on the CT owner body on experiment table, be placed on the detected materials component of the measurement ring inside on CT owner body, added to before detected materials structure manufacture is shaping in its material for following the trail of the iron sand particle indicating the internal displacement field change under load action of detected materials component, be connected and the Object Classification supporting with CT machine and pattern process computer with CT owner body, computer for controlling for control CT owner running body supporting with CT machine, CT machine display console and the Data Analysis Computer of the detected materials component of iron sand particle is contained for operating the CT machine scanning different experiments stage, CT owner body is for gathering the CT scan data of detected materials component, Object Classification and pattern process computer carry out to CT scan data the three-dimensional position distribution plan that three-dimensional reconstruction can obtain iron sand particle each moment, Data Analysis Computer carries out graphics process to three-dimensional position distribution plan, and to carry out whole audience coupling to the position of different phase all iron sand particle (be known whole audience matching process, repeat no more herein), thus determine not in the same time, the change in location of each iron sand particle be linked to be whole displacement field.
Above-mentioned computer for controlling is for the transmitted intensity of control CT owner body and sweep frequency.
Above-mentioned CT machine display console, can in real time reading scan result figure and control CT machine with screen and button.
By comparing the three-dimensional position distribution plan of two adjacent moment iron sand particles, after carrying out whole audience coupling, just can obtain the displacement that each iron sand particle occurred in adjacent two moment, thus determine not in the same time, the change in location of each iron sand particle be linked to be whole displacement field.
Above-mentioned Data Analysis Computer adopts PaintShop to carry out graphics process to three-dimensional position distribution plan, and that PaintShop specifically adopts is Photoshop or origin.
Beneficial effect of the present invention is as follows:
(1) be no matter that transparent material or non-transparent material all can measure its displacement field under load action, but not the shift value of limited the discontinuous measuring point measured by classic method, really realize the measurement of the whole displacement field of material internal; (2) the method principle is simple, and result of calculation is stablized, and measuring accuracy is high; (3) the method has only added a small amount of iron sand particle in detected materials component, and the particle diameter of iron sand particle is very little, can not affect the mechanical property of detected materials; (4) the method process is simple, and little to detected materials disturbance, measuring accuracy is high, substantially increases the level of material test.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of measuring system based on CT reconstruction biomaterials component inside displacement field of the present invention.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
See Fig. 1, a kind of measuring system based on CT reconstruction biomaterials component inside displacement field of the present invention comprises experiment table 1, the CT owner body 2 be arranged on experiment table 1, the detected materials component 3 be placed on experiment table, the inner prepositioned iron sand particle 4 of detected materials component 3, to be connected with CT owner body 2 and the Object Classification supporting with CT machine and pattern process computer 5, computer for controlling 6, CT machine display console 7 and the Data Analysis Computer 8 supporting with CT machine.
Wherein, iron sand particle 4 in detected materials component 3 is before structure manufacture is shaping, add detected materials component 3, can be mixed into uniformly in sandstone aggregate before building for concrete component iron sand particle, can directly be mixed in soil for soil test specimen iron sand, can add when plastics are in liquid form for plastic member iron sand.The method of this interpolation iron sand also determines this measuring method and can not be applicable to all material members, because some component cannot add iron sand particle in inside, such as natural timber just cannot add iron sand particle in inside.Notice that particle diameter and the quantity of interpolation iron sand particle 4 are suitable, the mechanical characteristic of detected materials can not be affected, also will ensure the continuity measuring displacement field.
Concrete measuring method is as follows:
When detected materials component 3 is shaping reach can carry out the requirement tested time, the measurement ring this component being placed on CT owner body 2 is inner, then Installation and Debugging experimental provision.
Control release loading speed, carries out the mechanical property tests of detected materials component 3.Operate CT machine by CT machine display console 7 simultaneously, scan the detected materials component that the different experiments stage contains iron sand particle.
After experiment terminates, material members CT scan data different phase collected carry out three-dimensional reconstruction on the supporting Object Classification of CT machine and pattern process computer 5.Because iron sand particle presents different indicating characteristics from detected materials under x-ray bombardment, the material members CT scan data of collection can obtain the three-dimensional position distribution plan of iron sand particle after carrying out CT three-dimensional reconstruction.
The iron sand particle three-dimensional location map of different phase that in Object Classification supporting for CT machine and pattern process computer 5, Three-dimensional Gravity has been built up is imported in Data Analysis Computer 8 and carries out pattern analysis, choose a coordinate system, calculate each iron sand particle coordinate in the coordinate system.
In Data Analysis Computer 8, the coordinate of all for different phase iron sand is carried out whole audience coupling, determines not in the same time, the change in location of each iron sand particle be linked to be whole displacement field.
The present invention really can realize the measurement of the inner whole displacement field of multiple material, and measuring process is simple, and little to detected materials disturbance, measuring accuracy is high, substantially increases the measurement level of material test.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. the measuring system based on CT reconstruction biomaterials component inside displacement field, it is characterized in that, comprise experiment table (1), be arranged on the CT owner body (2) on experiment table (1), be placed on the detected materials component (3) of the measurement ring inside on CT owner body (2), shaping adding to before in its material for following the trail of the iron sand particle (4) indicating detected materials component (3) internal displacement field change under load action is made at detected materials component (3), be connected with CT owner body (2) and the Object Classification supporting with CT machine and pattern process computer (5), the computer for controlling (6) that for control CT owner body (2) run supporting with CT machine, CT machine display console (7) and the Data Analysis Computer (8) of the detected materials component (3) of iron sand particle (4) is contained for operating the CT machine scanning different experiments stage,
Described CT owner body (2) is for gathering the CT scan data of detected materials component (3);
Described Object Classification and pattern process computer (5) carry out to CT scan data the three-dimensional position distribution plan that three-dimensional reconstruction can obtain iron sand particle (4) each moment;
Described Data Analysis Computer (8) carries out graphics process to three-dimensional position distribution plan, and whole audience coupling is carried out to the position of all iron sand particles (4) of different phase, thus determine not in the same time, the change in location of each iron sand particle (4) be linked to be whole displacement field.
2. the measuring system based on CT reconstruction biomaterials component inside displacement field according to claim 1, is characterized in that, described computer for controlling (6) is for the transmitted intensity of control CT owner body (2) and sweep frequency.
3. the measuring system based on CT reconstruction biomaterials component inside displacement field according to claim 1, is characterized in that, described CT machine display console (7), can in real time reading scan result figure and control CT machine with screen and button.
4. the measuring system based on CT reconstruction biomaterials component inside displacement field according to claim 1, it is characterized in that, by comparing the three-dimensional position distribution plan of two adjacent moment iron sand particles (4), after carrying out whole audience coupling, just can obtain the displacement that each iron sand particle (4) occurred in adjacent two moment, thus determine not in the same time, the change in location of each iron sand particle (4) be linked to be whole displacement field.
5. the measuring system based on CT reconstruction biomaterials component inside displacement field according to claim 1, it is characterized in that, described Data Analysis Computer (8) adopts PaintShop to carry out graphics process to three-dimensional position distribution plan, and that described PaintShop specifically adopts is Photoshop or origin.
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| CN201510313932.6A CN104914118A (en) | 2015-06-09 | 2015-06-09 | System for measuring displacement field in reconstructed material component based on CT |
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| CN201510313932.6A CN104914118A (en) | 2015-06-09 | 2015-06-09 | System for measuring displacement field in reconstructed material component based on CT |
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Cited By (3)
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| CN110847250A (en) * | 2019-11-01 | 2020-02-28 | 同济大学 | Visual test model and method considering influence of seepage loading on rail transit |
| CN110849722A (en) * | 2019-11-01 | 2020-02-28 | 同济大学 | Visual test device and method for influence of loading and unloading on rail transit |
| CN111238961A (en) * | 2020-01-16 | 2020-06-05 | 西安交通大学 | Soft matter discontinuous strain field measuring method based on multi-particle tracking technology |
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