CN106706676B - A kind of industry CT scan test method and pilot system - Google Patents
A kind of industry CT scan test method and pilot system Download PDFInfo
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- CN106706676B CN106706676B CN201510431502.4A CN201510431502A CN106706676B CN 106706676 B CN106706676 B CN 106706676B CN 201510431502 A CN201510431502 A CN 201510431502A CN 106706676 B CN106706676 B CN 106706676B
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Abstract
The invention discloses a kind of industry CT scan test method and pilot systems；This method specifically includes: meeting the Fluid pressure loading device of test demand according to the size preprocessing of sample；Sample is installed, the two is collectively disposed to the sample table of multiaxial motion turntable in the Fluid pressure loading device, and carries out the load of different directions load to the sample according to test demand；Ray needed for starting ray generating device transmitting scanned sample, controls the ray that ray generating device described in image acquisition device issues, and the imaging of the sample is completed according to the collected ray；Sample is loaded using Fluid pressure in this method, fluid can lesser self weight biggish loading force is provided, meet the needs of big number Geotechnical materials deformation failure test absolutely and loading device and sample be collectively disposed on the sample table of multiaxial motion turntable, can according to test demand during the scanning process in real time, continuously adjust the loading force that load cylinder is applied on ground class sample.
Description
Technical field
The present invention relates to sample scans technical field, in particular to a kind of industry CT scan test test method and test system
System.
Background technique
Industry CT (Computed Tomography) scanning technique provides effectively for analysis and research material internal structure
Experimental technique means are widely applied in related every field.
Current industry CT is usually rotary scanning to be carried out using X-ray penetrator body section and by high-performance computer
The reconstruction of system realization internal image.Its principle is to penetrate that tested object is later to be penetrated by specific detector measurement X-ray
Line intensity, the scanning motion being completed at the same time between X-ray production apparatus, detector and tested object, to obtain needed for CT image reconstruction
Partial data, finally go out the cross-section image of object using these data reconstructions according to certain algorithm.
But due to the essential characteristic of industry CT scanning technique, preferable resolving power, on the one hand needs as far as possible in order to obtain
Reduce beam focus size, which limits the penetration capacitys of ray；On the other hand it also needs to limit the size of sample simultaneously meticulously
Ensure that sample stablizes rotation during scanning, which limits the dimensions of sweep object.These limitations are largely
On affect application of the CT technology in mechanical analysis.Because experiment of machanics be unable to do without loading device, and general loading device
Usually there is the bigger scale of construction and weight, be difficult to be placed directly in Industrial CT Machine and be scanned.Therefore it generally adopts in the prior art
With external load, then the sample after load is placed on CT testing stand again.This loading method precision is relatively low, and one
Denier load is completed, and the loaded load of test sample is not adjustable.
For the simulation of the stress condition of Geotechnical materials, the load of simple single power be it is inadequate, often need to carry out
Repeated loading Uninstaller, therefore realization to loading device and control have higher requirement.
Therefore how a kind of industry CT scan test method is provided, which is conducive to load convenient for sample power, can mention
The test efficiency of high sample is those skilled in that art's technical problem urgently to be resolved.
Summary of the invention
It is an object of the present invention to provide a kind of industry CT scan test method and pilot system, which be can be realized
Real-time, the continuous load of test sample during the scanning process improves system model accuracy, and can realize that the multi-direction of sample adds
It carries, meets test demand.
In order to solve the above technical problems, the present invention provides a kind of industry CT scan test method, this method is specifically included:
Meet the Fluid pressure loading device of test demand according to the size preprocessing of sample；
Sample is installed in the Fluid pressure loading device, the two is collectively disposed to the sample table of multiaxial motion turntable, and
The load of different directions load is carried out to the sample according to test demand；
Ray needed for starting ray generating device transmitting scanned sample, controls the hair of ray described in image acquisition device
The ray that generating apparatus issues, and complete according to the collected ray imaging of the sample.
Optionally, it before sample being installed to the Fluid pressure loading device, follows the steps below:
The pipeline for being connected to the Fluid pressure loading device and route are placed in the surface of the sample table.
Optionally, during ray scanning, control synchronous rotating device and the sample table synchronization action, to make to connect
The pipeline and route that lead to the Fluid pressure loading device are always positioned at the surface of the sample table.
Optionally, before the Fluid pressure loading device being placed in the sample table, to sample table ray generating device
It is preheated and is calibrated, and adjusted sample table to estimating position according to test demand.
Optionally, before carrying out pressure-loaded to sample, fluid media (medium) is first full of medium pipeline, so as to will be in pipeline
Gas discharge, is then shut off oil return line, then carry out initial load load.
Optionally, preprocessing automatic winding device is gone back, the automatic winding device is installed on the sample before on-test
Immediately below platform, during ray scanning, the automatic winding device and the sample table synchronous rotary are driven, so as to by sample table
The pipeline of lower section is wound to the automatic winding device, or the pipeline being wound on the automatic winding device is unclamped.
Optionally, during ray scanning, believed according to the exterior line pressure for being connected to the Fluid pressure loading device
Number, sample strain stress signal, adjust the loading force that the Fluid pressure loading device is applied on the sample in real time so that
The loading force on the sample is applied to be in expected range.
The present invention also provides a kind of industry CT scan test system, including test base and it is supported in the test base
Multiaxial motion turntable, the ray generating device, image collecting device, Fluid pressure loading device, synchronous rotating device of seat, are also wrapped
Include control device；
The multiaxial motion turntable, equipped with the sample table for placing sample, the sample table can phase according to test demand
The test base is rotated or is moved along predetermined direction；
The ray generating device, for ray needed for emitting scanned sample；
Described image acquisition device is set to the opposite side of the ray generating device, occurs for acquiring the ray
The ray that device issues, and complete according to the collected ray imaging of the sample；
The Fluid pressure loading device carries out the real-time of different directions load to the sample according to test demand and adds
It carries, when being scanned experiment, each load cylinder and the sample are collectively disposed on the sample table of the multiaxial motion turntable；
The synchronous rotating device, and the sample table synchronization action, to make to be connected to the Fluid pressure loading device
Pipeline and route be always positioned at the surface of the sample table；
The control device, for controlling the multiaxial motion turntable, the ray generating device, described image acquisition dress
It sets, the movement of the Fluid pressure loading device, the synchronous rotating device.
Optionally, the Fluid pressure loading device includes ontology, and the body interior offers sample accommodating cavity, at least
One fluid media (medium) chamber, the inside of each fluid media (medium) chamber are equipped with piston, and the piston will the corresponding fluid media (medium) chamber
Two chambers are isolated into, wherein the oil communication external hydraulic medium that a chamber is arranged by the body interior, another chamber
It is connected to the sample accommodating cavity, and one end of each piston towards the sample accommodating cavity can extend to the sample accommodating cavity
It is internal.
Optionally, the quantity of the fluid media (medium) chamber is three, and three constitutes three-axis reference, and one of them is vertical
Setting.
Optionally, the synchronous rotating device includes fixed bracket, pole bracket, and the fixed pedestal lower end portion is supported in
On the test base, the support bracket fastened upper end is rotatablely connected along the vertical direction with the pole bracket；
Guide rail, the sliding block slided with guide rail cooperation and the driving sliding block are provided on the pole bracket along institute
State the driving part of guide rail movement；
The medium pipeline for being connected to the load cylinder is limited in the sliding block, and extends downwardly connection from the slide position
Positioned at the ontology of the sample table.
It optionally, further include the automatic winding device being set to below the sample table, the automatic winding device includes upper end
The lower end of threaded rod that portion is fixedly connected with the sample table, nut assembly, reel, the threaded rod passes through sample table
Threading hole extends downwardly；
The nut assembly includes nut and circumferentially limits the fixed frame of the nut and the multiaxial motion turntable
Positioning element, the nut have the internal screw thread cooperated with the external thread part of the threaded rod；The reel is sheathed on described
Threaded rod and the two are axially flexibly connected, and the reel is fixedly connected with the nut.
Optionally, the positioning element is separation in the guide rod of the threaded rod two sides and is sheathed on two guide rods
Slide plate, the slide plate are in axial sliding connection with the guide rod, and the slide plate is fixedly connected with the nut.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of industry CT scan test system in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of Fluid pressure loading device in a kind of specific embodiment of the present invention；
Fig. 3 is the structural schematic diagram of synchronous rotating device in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of pole bracket；
Fig. 5 is support bracket fastened structural schematic diagram；
Fig. 6 is the structural schematic diagram of runing rest；
Fig. 7 is the structural schematic diagram of automatic winding device in an embodiment of the present invention；
Fig. 8 is the assembling schematic diagram of automatic winding device and sample table；
Fig. 9 is the flow diagram of industry CT scan test method in an embodiment of the present invention.
Wherein, one-to-one relationship of the Fig. 1 into Fig. 8 between component names and appended drawing reference is as follows:
Ray generating device 1, high pressure generator 1b, multiaxial motion turntable 2,2e, image collecting device 3, Fluid pressure add
It carries and sets 4, ontology 41, first piston 42, first flange 43, second flange 44, the second connector 45, the first connector 46,
Two pistons 47, sample accommodating cavity 4a, fluid media (medium) chamber 4b, fabrication hole 4c, fluid media (medium) chamber 4d, channel 4e, synchronous rotating device
5, multi-channel synchronous high-pressure rotary device 5a, pole bracket 5b, runing rest 5c, fixed bracket 5d, crossbeam 5b1, end plate 5b2, the
Three supporting plate 5b3, guide rail 5b4, sliding block 5b5, lead screw 5b6, nut seat 5b7, vertical plate 5b10, bearing 5b11, round tube 5b12, column
5d1, bottom plate 5d2, floor 5d3, horizontal shelf 5d4, floor 5d5, newel 5c1, the second supporting plate 5c2, floor 5c3, gear
5c4, bearing 5c5, bearing 5c6, control device 6, automatic winding device 7, threaded rod 7a, nut 7b, sliding block 7c, reel 7d, axis
Hold 7e, guide rod 7f, yoke plate 7g, ess-strain acquisition device 8, test base 9, control panel 10.
Specific embodiment
Core of the invention is to provide a kind of industry CT scan test method and pilot system, the pilot system can be realized
The real-time loading of test sample improves system model accuracy, and can realize the multi-direction load of sample, meets test demand.
In order to make those skilled in the art more fully understand technical solution of the present invention, a kind of specific work is integrated herein
Industry CT scan pilot system, test method, the present invention is described in further detail for the drawings and specific embodiments.
Referring to FIG. 1, Fig. 1 is the structural schematic diagram of industry CT scan test system in an embodiment of the present invention.
The present invention provides a kind of industry CT scan test system, which includes test base 9 and is supported in test
Multiaxial motion turntable 2, ray generating device 1, image collecting device 3, Fluid pressure loading device 4, control device on pedestal 9
6.Wherein, multiaxial motion turntable 2 is equipped with the sample table for placing sample, and sample table can be according to test demand relative test base
9 rotation of seat is moved along predetermined direction, and predetermined direction described herein can be for along principal ray Shu Fangxiang, i.e. front-rear direction be transported
It is dynamic, or perpendicular to principal ray Shu Fangxiang in horizontal plane, i.e. left and right directions moves, or perpendicular to master in vertical plane
Beam direction, i.e. up and down direction；Similarly, the rotation of sample table can be the rotation around vertical direction, generally, in order to realize
Above-mentioned rotation, different directions linear motion function, multiple sample tables can be set, i.e. sample table can specifically include rotation
Sample table, front-rear direction mobile platform, left and right directions mobile platform, up and down direction mobile platform.The movement of each sample table can be with
It is driven by motor, motor connects control device 6 by control line (power supply line and signal wire), and operator passes through operation control dress
6 control motors are set, and then realize the corresponding actions of sample table.
The type that ray generating device 1 issues ray at present is generally X-ray, naturally it is also possible to other class rays are used,
Introduce technical solution by taking X-ray as an example herein, ray generating device 1 may include ray tube, high pressure generator 1b, control cabinet,
It because X-ray has radiation, therefore is typically placed inside screened room, ray tube passes through high-tension cable, control line and high pressure generator 1b
And control cabinet connection, control cabinet are connect by cable with control device 6, adjustable voltage, the electric current for generating ray of control device 6
Etc. parameters, and carry out instruction machine and calibration.For the security consideration of testing crew, X-ray control cabinet goes out beam control switch and screen
Cover room lead door trigger and indicator light connection, it is ensured that when divergent-ray, indicator light is lighted, and lead door will not divergent-ray when opening.
Image collecting device 3 is set to the opposite side of the ray generating device 1, for acquiring the ray generating device
1 ray issued, and complete according to the collected ray imaging of the sample；Image collecting device 3 can wrap
Flat panel detector, mobile platform are included, flat panel detector is fixed on a mobile platform, and mobile platform can along the principal ray beam direction of the launch
Relative test pedestal 9 is mobile, to realize the imaging of different enlargement ratios.Wherein, the movement of mobile platform can be driven by motor
It realizes, naturally it is also possible to realize movement for other component driving.
Mobile platform can use the components such as aluminium alloy extrusions processing and fabricating, including two root posts, crossbeam, floor, as long as
It is able to achieve the secure support of flat panel detector, the movement of mobile platform can be realized by the cooperation of guide rail and sliding block.Plate is visited
It surveys device to purchase by required model, the parameters such as effective area, pixel quantity, gray level select according to demand.
It should be noted that ray detector is not limited to above-mentioned flat panel detector in image collecting device 3, or
Other kinds of detector, as long as being able to achieve above-mentioned function.
Fluid pressure loading device 4 completes the real-time loading that different directions load is carried out to sample according to test demand, and
And when being scanned experiment, Fluid pressure loading device and sample are collectively disposed on the sample table of multiaxial motion turntable 2.Fluid
It can be liquid, i.e. hydraulic oil or water etc., or gas.Fluid pressure loading device 4 may include at least one load
Cylinder, load cylinder realize the load of sample pressure.
Sample described herein can be ground class sample, or other kinds of sample.Herein with ground class
It is tested for sample, the technical effect of pilot system provided by detailed description.
Referring to FIG. 9, Fig. 9 is the flow diagram of industry CT scan test method in an embodiment of the present invention, herein also
A kind of industry CT scan test method of above-mentioned pilot system is given, specific as follows:
S1, the Fluid pressure loading device for meeting test demand according to the size preprocessing of sample；
The two is collectively disposed at the sample table of multiaxial motion turntable in the Fluid pressure loading device by S2, installation sample,
And the load of different directions load is carried out to the sample according to test demand；
Ray needed for S3, starting ray generating device transmitting scanned sample, controls and penetrates described in image acquisition device
The ray that line generating device issues, and complete according to the collected ray imaging of the sample.
From the above, it can be seen that using Fluid pressure to sample in industry CT scan test method provided in this article
Loaded, fluid can lesser self weight biggish loading force is provided, meet number Geotechnical materials deformation failure test big absolutely
Demand, i.e., compared with prior art, under the premise of providing identical power, Fluid pressure loading device volume herein is smaller,
It is self-possessed smaller.In addition, loading device and sample are collectively disposed on the sample table of multiaxial motion turntable 2 in this test method, it can
With according to test demand during the scanning process in real time, continuously adjust load cylinder and be applied to loading force on ground class sample, be not necessarily to
Sample is removed into sample table, improves test efficiency.
Also, the load of sample different directions power may be implemented according to the quantity of setting load cylinder, such as setting two add
Carry cylinder, it can be achieved that sample both direction power load；Three load cylinders, which are arranged, can realize three different directions of sample, such as can be real
The simulated experiment that existing three-axis reference power is recorded.
Referring to Figure 2, Fig. 2 is the structural representation of Fluid pressure loading device in a kind of specific embodiment of the present invention
Figure；Wherein, both direction load is illustrated only in Fig. 2, vertically and horizontally.
Specifically, Fluid pressure loading device 4 includes ontology 41 in a specific embodiment, in above-mentioned steps S1
Increase following steps: opening up sample accommodating cavity 4a, at least one fluid media (medium) chamber inside ontology 41, sample accommodating cavity 4a is for holding
It receives and fixes sample；The inside of each fluid media (medium) chamber is respectively provided with piston, and corresponding fluids dielectric cavity is isolated into two chambers by piston,
Wherein a chamber is by the oil communication external hydraulic medium that is arranged inside ontology 41, another chamber sample accommodating cavity 4a,
And one end of each piston towards sample accommodating cavity 4a can extend to inside sample accommodating cavity 4a；Fluid media (medium) chamber and piston, which are formed, to be added
Carry cylinder.
Sample is placed in the inside of the ontology 41 of loading device when carrying out power load to sample by the embodiment first,
Then fluid media (medium) is filled to the intracavitary portion of fluid media (medium) inside ontology 41 in driving external agency source, in incoming fluid dielectric cavity fluid
Under the promotion of medium, the piston for being placed in the intracavitary portion of fluid media (medium) is mobile towards sample accommodating cavity 4a, with the continuous note of fluid media (medium)
Enter, piston is against sample and applies certain power in sample.Operator can be according to the pressure of fluid media (medium), piston in pipeline
The power that area, calculating are applied on sample, to realize the load of sample power.
The sample power loading method provides the pressure of different directions by embedded load cylinder, by taking liquid medium as an example, pressure
Power can achieve 200Mpa, and can realize three axis, two axis, uniaxial loading test, and loading device is relatively simple for structure, and volume can
Match sample design.
Wherein, ontology 41 can be manufactured using high-strength light aluminum alloy materials, both met big load and recorded lower body 41
Intensity requirement has the requirement that ray penetrates when meeting CT scan, also reduces tank body self weight to meet turntable to scanned copy weight
The requirement of limitation.
When the power being applied on sample is two dimension mutually vertical forces (two axis), the corresponding quantity of fluid media (medium) chamber is
Two, respectively first fluid dielectric cavity 4b and second fluid dielectric cavity 4d, the corresponding piston is specially 42 He of first piston
Second piston 47, first piston 42 are placed in the inside of first fluid dielectric cavity 4b, and second piston 47 is placed in second fluid dielectric cavity
The inside of 4d, and 42 axial direction of first piston and the axially vertical arrangement of second piston 47.First piston 42 herein is along level side
To second piston 47 is axial along the vertical direction, and certainly, the axial direction of first piston 42 and second piston 47 can be according to actual loaded
The demand of power is arranged.
When simulating three-axis force, further processing constitutes axial coordinate in the step S1 of above-mentioned process fluid pressure loading device
It is three fluid media (medium) chambers, and one of them described fluid media (medium) chamber is vertically arranged.I.e. fluid media (medium) chamber further includes third
Fluid media (medium) chamber, the inside of the third fluid media (medium) chamber are also equipped with third piston, and axial, described the second of the third piston
The axial of axial, the described first piston of piston constitutes three-axis reference.Though not providing the signal of third fluid media (medium) chamber herein
Figure, but according to the verbal description of this paper, those skilled in that art are readily appreciated that and carry out implementing the technical solution.
It further, can be by piston in order to obtain the bigger loading force of sample with lesser load cylinder interior pressure
It is designed as variable cross-section, i.e. cross sectional dimensions of the cross sectional dimensions of the first end face of piston greater than second end face, the first end
Face is the end face towards fluid media (medium) end, and the second end face is the end face towards the end sample accommodating cavity 4a.
In actual tests, the operating pressure for loading cylinder interior is smaller, and the pressure of oil pipe connection and pump is easier full
Enough, it is bigger to be added to the pressure in sample, biggish loading force is easy to implement, particularly with Z-direction (vertical direction) portion
Dividing, which does not influence ray, penetrates, for size without particular/special requirement.
In addition, for X, the load of Y both direction under the premise of guaranteeing loading force size, will also reduce as far as possible ray and wear
The influence generated when thoroughly to sample, therefore the outer dimension of ontology 41 wants sufficiently small, but it has to be ensured that its experiment load, because
This work in-process, ontology 41 use asymmetrical loading mode, i.e., in longitudinal section, the wall of fluid media (medium) chamber side is arranged in ontology 41
Thickness is greater than the wall thickness of opposite side.It can also be seen that 41 thickness of ontology of the setting side first fluid dielectric cavity 4b is greater than phase from Fig. 2
The thickness of opposite side ontology 41.
Following steps can also be increased in above-mentioned steps S1: fabrication hole is set on the ontology 41 opposite with fluid media (medium) chamber
The radial dimension of 4c, the fabrication hole 4c are less than the radial dimension of fluid media (medium) chamber, and fabrication hole 4c can reduce fluid media (medium) chamber
Difficulty of processing.Certainly, when carrying out power loading experiment, fabrication hole 4c is needed with blocking.
In addition, in order to ensure fluid media (medium) cavity wall machining accuracy, in order to guarantee influence of the loading oil circuit to ray, connection
The hydraulic fluid port of external hydraulic medium is all set in the upper surface of ontology 41, is connected to each fluid media (medium) chamber by inner passage, using
Vent line is directly processed in ontology, it in this way can be to avoid the influence because of external oil pipe to ray.
For the ease of sample from the inside for being arranged in sample accommodating cavity 4a outside, ontology 41 is additionally provided with connection lower surface and institute
The channel 4e of sample accommodating cavity 4a is stated, so that the sample is placed in from the channel 4e inside of the sample accommodating cavity 4a, and
And the arrival end of channel 4e is additionally provided with blocking.
For the ease of the installation and assembly of ontology 41, flange can also be arranged in the upper and lower ends portion of ontology 41, and connector is logical
Cross the flange for being bolted 41 both ends of ontology.Lower end is that first flange 43 and the first connector 46 are cooperatively connected, upper end
It is cooperatively connected for second flange 47 and the second connector 45.
In addition, it is also provided with seal member therebetween in order to guarantee the sealing between piston and fluid media (medium) chamber,
Seal member can be sealing ring, be machined with mounting groove on the peripheral wall of piston, sealing ring is placed in the inside of mounting groove.
Sample table in the various embodiments described above can be moved or be rotated relative to test base 9, that is to say, that above-mentioned each reality
The ontology 41 in example is applied during the test also with 9 relative motion of test base.Therefore in order to guarantee the external oil for being connected to ontology 41
The interference of the pipeline on road can be arranged as follows with further progress.
In the various embodiments described above, before sample is installed to the Fluid pressure loading device, i.e. carried out before step S2
Following steps:
S12, the surface that the pipeline for being connected to the Fluid pressure loading device and route are placed in the sample table.
Fig. 3 to Fig. 6 is please referred to, Fig. 3 is the structural schematic diagram of synchronous rotating device in an embodiment of the present invention；Fig. 4 is
The structural schematic diagram of pole bracket；Fig. 5 is support bracket fastened structural schematic diagram；Fig. 6 is the structural schematic diagram of runing rest.
In industry CT scan test method in the various embodiments described above, preprocessing synchronous rotating device is gone back in step sl,
The synchronous rotating device is installed on to the top of the sample table before on-test, connects the Fluid pressure loading device
Pipeline be limited in the synchronous rotating device；
During ray scanning, i.e. following movement is also carried out in step S3 simultaneously: control the synchronous rotating device and
The sample table synchronization action, to make the pipeline for being connected to the Fluid pressure loading device and route be always positioned at the sample
The surface of platform.
Synchronous rotating device 5 may include fixed bracket 5d, pole bracket 5b, and pole bracket 5b is placed in the upper of load cylinder
Side, the fixed lower end bracket 5d are supported on test base 9, and the upper end of fixed bracket 5d and pole bracket 5b are along the vertical direction
Rotation connection, i.e. pole bracket 5b can be rotated around vertical direction relative to fixed bracket 5d.
The sliding block 5b5 and driving sliding block 5b5 of guide rail 5b4 and guide rail 5b4 cooperation are provided on pole bracket 5b along guide rail
The driving part of 5b4 movement；The medium pipeline of connection load cylinder is limited on sliding block 5b5, so that medium pipeline can be with sliding block
5b5 opposite rail 5b4 sliding, and the load cylinder that connection is located at sample table is extended downwardly from the position sliding block 5b5.In ray scanning
In the process, control device 6 can control driving part movement, make sliding block 5b5 and sample table synchronization action, in this way can be according to not
With the difference of sample table position under the sample of size, different enlargement ratio, the position real-time adjusting slider 5b5 makes medium pipeline begin
Eventually perpendicular to load cylinder, avoids pipeline and load the generation of cylinder wrapping phenomena, ensure the regular event of load cylinder.
Synchronous rotating device 5 can also include the multichannel high-pressure rotary device 5a being connected with sliding block 5b5, the rotation of multichannel high pressure
Turn device 5a and specifically include the fixing end pipe fitting and round end pipe fitting being connected to by inner passage, fixing end pipe fitting passes through oil
Pipe is connected to driving source, round end pipe fitting connection load cylinder.Round end pipe fitting can be rotated synchronously with the rotation of sample stage,
It will not hinder the rotation of load cylinder.
In the various embodiments described above, the driving part in synchronous rotating device 5 may include motor, lead screw 5b6 and lead screw 5b6
Thread head cooperation nut seat 5b7, in the internal thread hole of nut seat 5b7, the other end is solid for the thread head of lead screw 5b6
Connection sliding block 5b5, motor driven lead screw 5b6 rotation are determined, to realize that lead screw 5b6 band movable slider 5b5 is moved back and forth.
Wherein, the synchronous rotating device 5 of the various embodiments described above can also include being set to fixed bracket 5d and pole bracket
Runing rest 5bc between 5b, fixed bracket 5d includes column 5d1, and the bottom column 5d1 is supported in test base 9, column 5d1
Upper end be additionally provided with horizontal shelf 5d4；It can be in order to increase the reliability of connection, between horizontal shelf 5d4 and column 5d1
Increase floor 5d5, bottom plate 5d2 can also be arranged in the lower end of column 5d1, increase floor 5d3 between bottom plate 5d2 and column 5d1.
Runing rest includes newel 5c1, the lower end of newel 5c1 and the upper end suit of column 5d1 and circumferentially leads to
Bearing 5c5 rotation connection is crossed, gear 5c4 is further fixed on newel 5c1, further includes the motor of sliding tooth wheel rotation, motor is solid
Due to horizontal shelf 5d4, motor drives newel 5c1 to rotate relative to column 5d1 by gear 5c4；The upper end of newel 5c1
It is fixed with the second supporting plate 5c2, pole bracket is fixed on the second supporting plate 5c2.
It, can also be between newel and the second supporting plate 5c2 for the reliability that the second supporting plate 5c2 and newel are fixed
Increase floor 5c3, while in order to increase newel 5c1 rotation flexibility, the upper end newel 5c1 can also add positioning bearing
5c6。
Pole bracket include the horizontal-extending two crossbeams 5b1 and end plate 5b2 for being connected to two ends the crossbeam 5b1,
Third supporting plate 5b3, the driving part are set to above the third supporting plate 5b3, and the third supporting plate 5b3 and fixed bracket 5d
Rotation connection, the guide rail 5b4 are set to two upper surfaces the crossbeam 5b1.
The rear end of the crossbeam 5b1 is additionally provided with two parallel vertical plate 5b10, is also connected between two parallel vertical plate 5b10
Round tube 5b12, round tube 5b12 vertical plate 5b10 parallel with two are rotatablely connected by bearing 5b11, and pipeline is taken in the surface round tube 5b12, when
When sliding block slides back and forth, pipeline can be rolled with round tube 5b12, reduce frictional force between the two.
In order to accurately obtain the loading force that load cylinder is applied on sample, it can further be arranged on test base 9 and answer
Stress-strain acquisition device 8, for acquiring the ess-strain parameter on the sample different directions；The control device 6 is according to institute
State the pressure of fluid media (medium) in Fluid pressure loading device 4 described in ess-strain state modulator.Wherein ess-strain acquisition device 8
Including sensor and signal acquisition equipment, sensor is set on ontology, and signal acquisition equipment is being generally positioned at sample stage just
On the test base 9 of lower section, by the connection such as signal wire between signal acquisition equipment and sensor, in order to avoid sample stage rotation
When signal wire wind, also carried out arranged below, be described in detail below herein.
Fig. 7 and Fig. 8 are please referred to, Fig. 7 is the structural schematic diagram of automatic winding device in an embodiment of the present invention；Fig. 8 is certainly
The assembling schematic diagram of dynamic winder and sample table.
Industrial CT scanning method in the various embodiments described above is gone back preprocessing automatic winding device simultaneously in step sl, is being tried
The automatic winding device is installed on immediately below the sample table before testing beginning, during ray scanning, is driven described automatic
Winder and the sample table synchronous rotary, so that the pipeline below sample table is wound to the automatic winding device, or will twine
It is unclamped around to the pipeline on the automatic winding device.
Automatic winding device 7 may include threaded rod 7a, nut 7b component, reel 7d, when installation, the upper end of threaded rod 7a
Portion is fixedly connected with sample table, and the threading hole that lower end passes through multiaxial motion turntable 2 extends downwardly, and nut 7b component includes nut
7b and the positioning element for circumferentially limiting the fixed frame of nut 7b and multiaxial motion turntable 2, nut 7b is set on the outer of threaded rod 7a
Threaded portion, reel 7d is sheathed on threaded rod 7a and the two is axially flexibly connected, and reel 7d is fixedly connected with nut 7b.
When installing first, the signal wire on sample table in loading device is wound in the surface reel 7d, passes through signal wire
Other connecting components are transferred to after reel 7d surface wrap.In this way when sample table rotates, threaded rod 7a is also same with sample table
Step rotation, because nut 7b is circumferentially fixed, therefore opposite thread bar 7a is moved upwardly or downwardly, and then the reel fixed with nut 7b
7d is also moved upwardly or downwardly with nut 7b, and the signal wire come in this way from the outflow of the edge through-hole of rotating sample is also with turntable one
Rotation is played, to will also rotate around reel 7d, signal wire is moved up and down relative to reel 7d in rotation, forms spiral
Signal wire, is wound on the surface reel 7d automatically by movement, and avoiding signal wire from knotting in sample table rotation influences loading device
Rotation.
In a kind of specific embodiment, positioning element can be separation in the guide rod 7f and set of the two sides threaded rod 7a
The slide plate 7c being slidably connected on two guide rod 7f and with guide rod 7f, nut 7b are fixed on slide plate 7c.This is relatively simple for structure, just
In the setting of nut 7b.
Further, the end of two guide rod 7f is also connected with yoke plate 7g, and bearing 7e is provided on yoke plate 7g, threaded rod 7a's
Free end passes through bearing 7e connection yoke plate 7g；The free end of threaded rod 7a also relative limit, is conducive to screw thread in the structure
The stability of bar 7a rotation.
In the various embodiments described above, following steps can be further increased in step S3: during ray scanning, according to even
Exterior line pressure signal, the sample strain stress signal of through-flow body pressure loading device, adjust the Fluid pressure in real time and add
The loading force set and be applied on sample is carried, is in expected range so as to be applied to the loading force on the sample.
Specifically, control panel 10 can also be further set in screened room, and control panel 10 can by touch screen interface
The parameter of loading device is arranged and shows the loaded load of sample, to complete the load to sample.Specific control panel
Structure can refer to existing equipment, and it is not described here in detail.
Before the Fluid pressure loading device is placed in the sample table, i.e. also sample table ray is sent out before step S2
Generating apparatus is preheated and is calibrated, and is adjusted sample table to estimating position according to test demand.Specifically, ray generating device
Preheating, calibration specific means can refer to the prior art, this will not be repeated here.
Before carrying out step S2, i.e., before carrying out pressure-loaded to sample, fluid media (medium) is first full of medium pipeline,
So that the gas in pipeline to be discharged, it is then shut off oil return line, then carry out initial load load.For fluid media (medium) be liquid and
Air discharge in pipeline is conducive to increase the accuracy of loaded load by speech in advance.
It should be noted that the upper and lower equal nouns of locality described herein are with the position between component each in Fig. 1-Fig. 8
Relationship defines for reference, merely to description technique scheme is succinct, should not limit the protection scope of this paper.
A kind of industry CT scan test system provided by the present invention is described in detail above.It is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand originally
The method and its core concept of invention.It should be pointed out that for those skilled in the art, not departing from this hair
, can be with several improvements and modifications are made to the present invention under the premise of bright principle, these improvement and modification also fall into power of the present invention
In the protection scope that benefit requires.
Claims (10)
1. a kind of industry CT scan test method, which is characterized in that this method specifically includes:
Meet the Fluid pressure loading device of test demand according to the size preprocessing of sample；
Sample is installed in the Fluid pressure loading device, the two is collectively disposed to the sample table of multiaxial motion turntable, and according to
Test demand carries out the load of different directions load to the sample；
Ray needed for starting ray generating device transmitting scanned sample, controls ray described in image acquisition device and fills
The ray of sending is set, and completes the imaging of the sample according to the collected ray；Sample is installed to the fluid pressure
Before force loading device, follow the steps below:
The pipeline for being connected to the Fluid pressure loading device and route are placed in the surface of the sample table；In ray scanning mistake
Cheng Zhong, control synchronous rotating device and the sample table synchronization action, to make to be connected to the pipe of the Fluid pressure loading device
Road and route are always positioned at the surface of the sample table；
Wherein, the synchronous rotating device includes fixed bracket, pole bracket, and the fixed pedestal lower end portion is supported in test base
On seat, the support bracket fastened upper end is rotatablely connected along the vertical direction with the pole bracket；
It is provided with guide rail on the pole bracket, is led described in the sliding block of guide rail cooperation sliding and the driving sliding block
The driving part of rail movement；
The medium pipeline for being connected to the load cylinder of the Fluid pressure loading device is limited in the sliding block, and from the sliding block position
It sets and extends downwardly the load cylinder that connection is located at the sample table.
2. industry CT scan test method as described in claim 1, which is characterized in that set the Fluid pressure loading device
Before the sample table, sample table ray generating device is preheated and calibrated, and according to test demand by sample table tune
It is whole to estimating position.
3. industry CT scan test method as described in claim 1, which is characterized in that before carrying out pressure-loaded to sample,
Fluid media (medium) is first full of medium pipeline, so that the gas in pipeline to be discharged, is then shut off oil return line, then carry out initial load
Load.
4. industry CT scan test method as described in any one of claims 1 to 3, which is characterized in that also preprocessing automatically around
The automatic winding device is installed on immediately below the sample table by line device before on-test, during ray scanning, driving
The automatic winding device and the sample table synchronous rotary, so that the pipeline below sample table is wound to the automatic winding
Device, or the pipeline being wound on the automatic winding device is unclamped.
5. industry CT scan test method as described in any one of claims 1 to 3, which is characterized in that in ray scanning process
In, according to exterior line pressure signal, the sample strain stress signal for being connected to the Fluid pressure loading device, institute is adjusted in real time
The loading force that Fluid pressure loading device is applied on the sample is stated, so that the loading force being applied on the sample is in pre-
It counts in range.
6. a kind of industry CT scan test system, which is characterized in that including test base and be supported in the test base
Multiaxial motion turntable, ray generating device, image collecting device, Fluid pressure loading device, synchronous rotating device further include control
Device processed；
The multiaxial motion turntable, equipped with the sample table for placing sample, the sample table can opposite institute according to test demand
It states test base rotation or is moved along predetermined direction；
The ray generating device, for ray needed for emitting scanned sample；
Described image acquisition device is set to the opposite side of the ray generating device, for acquiring the ray generating device
The ray issued, and complete according to the collected ray imaging of the sample；
The Fluid pressure loading device carries out the real-time loading of different directions load according to test demand to the sample, when
When being scanned experiment, each cylinder that loads is collectively disposed on the sample table of the multiaxial motion turntable with the sample；
The synchronous rotating device, and the sample table synchronization action, to make to be connected to the pipe of the Fluid pressure loading device
Road and route are always positioned at the surface of the sample table；
The control device, for control the multiaxial motion turntable, the ray generating device, described image acquisition device,
The movement of the Fluid pressure loading device, the synchronous rotating device；
The synchronous rotating device includes fixed bracket, pole bracket, and the fixed pedestal lower end portion is supported in the test base
On seat, the support bracket fastened upper end is rotatablely connected along the vertical direction with the pole bracket；
It is provided with guide rail on the pole bracket, is led described in the sliding block of guide rail cooperation sliding and the driving sliding block
The driving part of rail movement；
The medium pipeline for being connected to the load cylinder is limited in the sliding block, and extends downwardly connection from the slide position and be located at
The load cylinder of the sample table.
7. industry CT scan test system as claimed in claim 6, which is characterized in that the Fluid pressure loading device includes
Ontology, the body interior offer sample accommodating cavity, at least one fluid media (medium) chamber, and the inside of each fluid media (medium) chamber is equal
It is equipped with piston, the corresponding fluid media (medium) chamber is isolated into two chambers by the piston, wherein a chamber passes through in the ontology
The oil communication external hydraulic medium of portion's setting, sample accommodating cavity described in another chamber, and each piston are towards institute
The one end for stating sample accommodating cavity can extend to inside the sample accommodating cavity.
8. industry CT scan test system as claimed in claim 7, which is characterized in that the quantity of the fluid media (medium) chamber is three
A, three constitutes three-axis reference, and one of them is vertically arranged.
9. industry CT scan test system as claimed in claim 7, which is characterized in that further include being set under the sample table
Side automatic winding device, the automatic winding device include upper end be fixedly connected with the sample table threaded rod, nut assembly,
Reel, the threading hole that the lower end of the threaded rod passes through sample table extend downwardly；
The nut assembly includes nut and the positioning that circumferentially limits the fixed frame of the nut and the multiaxial motion turntable
Component, the nut have the internal screw thread cooperated with the external thread part of the threaded rod；The reel is sheathed on the screw thread
Bar and the two are axially flexibly connected, and the reel is fixedly connected with the nut.
10. industry CT scan test system as claimed in claim 9, which is characterized in that the positioning element is separation in institute
It states the guide rod of threaded rod two sides and is sheathed on the slide plate of two guide rods, the slide plate is in axial sliding connection with the guide rod,
The slide plate is fixedly connected with the nut.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042989A (en) * | 2010-10-27 | 2011-05-04 | 中国矿业大学(北京) | Remote controllable loading method and equipment with fluid CT (Computed Tomography) scanning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042989A (en) * | 2010-10-27 | 2011-05-04 | 中国矿业大学(北京) | Remote controllable loading method and equipment with fluid CT (Computed Tomography) scanning |
Non-Patent Citations (1)
| Title |
|---|
| 基于工业CT力学实验平台的建立及应用;毛灵涛 等;《CT 理论与应用研究》;20150331;第24卷(第2期);第271-282页 * |
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