CN109299574A - A kind of structure noodle producing method and system - Google Patents
A kind of structure noodle producing method and system Download PDFInfo
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- CN109299574A CN109299574A CN201811302048.2A CN201811302048A CN109299574A CN 109299574 A CN109299574 A CN 109299574A CN 201811302048 A CN201811302048 A CN 201811302048A CN 109299574 A CN109299574 A CN 109299574A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/05—Geographic models
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
Present disclose provides a kind of structure noodle producing method and systems, are related to engineering geology and geotechnical engineering field.Wherein, a kind of structure noodle producing method, comprising: obtain the point cloud data and target area image of target area；It is compared using the shading value and colouring information of the point cloud data of target area with target area image, judges all potential structure faces in target area；The relevant parameter in all potential structure faces is measured, and establishes structural plane three-dimensional digitalization model；Structural plane three-dimensional digitalization model is imported into 3D printer, completes structural plane model printing.Which solve structural planes in traditional technology to sample difficult problem, realizes virtual data material object, has preferable operability and practicability.The present invention is sampled without field structural plane simultaneously, ensure that the integrality of rock mass structure.
Description
Technical field
The disclosure belongs to engineering geology and geotechnical engineering field more particularly to a kind of structure noodle producing method and system.
Background technique
Only there is provided background technical informations relevant to the disclosure for the statement of this part, it is not necessary to so constitute first skill
Art.
Structural plane refers to extremely low or not tensile strength discontinuity surface.Structural plane includes the separation of all geology
Face.Different structural planes, mechanical property is different, scale is different.
The presence of structural plane makes discontinuity and inhomogeneities on rock mass display structure.The mechanical property of rock mass is not only
Depending on rock mechanical property itself, the Spatial Coupling feelings of mechanical property of structural plane and structural plane are depended greatly on
Condition.The most important mechanical property of structural plane first is that shearing strength, in research structure face when the dimensional effect of shearing strength, due to
The sampling of protolith structural plane is difficult, need to usually make various sizes of structural plane model instead of protolith structural plane and carry out shearing strength examination
Test research.
At present domestic and foreign scholars by similarity surface make structural plane model, but inventor discovery due to protolith structural plane at
The complexity of cause and the uncertainty of structural plane configuration of surface, so that structural plane model is difficult to simulate true protolith structure completely
Face causes the experiment of machanics result of structural plane model not exclusively credible.
Summary of the invention
According to the one aspect of one or more other embodiments of the present disclosure, a kind of structure noodle producing method is provided, in fact
Virtual data material object is showed, there is preferable operability and practicability.
A kind of structure noodle producing method of the disclosure, comprising:
Obtain the point cloud data and target area image of target area；
It is compared, is judged with target area image using the shading value and colouring information of the point cloud data of target area
All potential structure faces in target area；
The relevant parameter in all potential structure faces is obtained, and establishes structural plane three-dimensional digitalization model；
Structural plane three-dimensional digitalization model is imported into 3D printer, completes structural plane model printing.
In one or more embodiments, it before the point cloud data and target area image for obtaining target area, also wraps
It includes:
Target target is uniformly furnished in target area, does the use of monitoring feature point.
In one or more embodiments, using target area point cloud data shading value and colouring information and target area
Before area image compares, further includes:
Whole splicing, coordinate conversion are carried out to the point cloud data of acquisition and reject point cloud data noise, finally retains mesh
Mark region precision point cloud data.
In one or more embodiments, include: to the process of the point cloud data progress coordinate conversion of acquisition
At least six stability contorting point is chosen in target area, finds out this 6 stability contorting points under cloud scan coordinate system
Coordinate；
It measures the coordinate under 6 stability contorting point earth coordinates and imports point cloud data system as reference data；
The point cloud data of each measurement point is uniformly converted into earth coordinates, for realizing the three-dimensional space of target area
Body is rebuild.
In one or more embodiments, entire scan is carried out to target area using three-dimensional laser scanning system, obtained
Point cloud data.
In one or more embodiments, when three-dimensional laser scanning system scanning target area, the weight of front and back twice sweep
Folded part accounts for the 20~30% of whole image.
If the ratio that the lap of front and back twice sweep accounts for whole image is excessive, three-dimensional laser scanning system is used
Quantity can increase, waste three-dimensional laser scanning system resource；If the lap of front and back twice sweep accounts for the ratio of whole image
Example is too small, then will appear scan blind spot, to influence to judge the accuracy in potential structure face in target area, cannot obtain all
Potential structure face.
In one or more embodiments, point cloud data is imported into CAD software, and then measures all potential structure faces
Relevant parameter.
In one or more embodiments, the relevant parameter of structural plane includes occurrence, length, spacing and connected ratio.
The disclosure additionally provides a kind of structural plane preparation system, realizes virtual data material object, has preferable behaviour
The property made and practicability, while being sampled without field structural plane, it ensure that the integrality of rock mass structure.
A kind of structural plane preparation system of the disclosure, comprising:
Processor is configured as following steps:
Obtain the point cloud data and target area image of target area；
It is compared, is judged with target area image using the shading value and colouring information of the point cloud data of target area
All potential structure faces in target area；
The relevant parameter in all potential structure faces is obtained, and establishes structural plane three-dimensional digitalization model；
3D printer is configured as:
Structural plane three-dimensional digitalization model data are received, structural plane model is printed.
In one or more embodiments, a kind of structural plane preparation system, further includes:
Three-dimensional laser scanning system is connected with processor, is configured as carrying out entire scan to target area to obtain
Point cloud data.
In one or more embodiments, the processor, is also configured to
Before the point cloud data and the target area image that obtain target area, target target is uniformly furnished in target area,
Do the use of monitoring feature point.
In one or more embodiments, the processor, is also configured to
It is right before being compared using the shading value and colouring information and target area image of the point cloud data of target area
The point cloud data of acquisition carries out whole splicing, coordinate conversion and rejects point cloud data noise, and it is accurate finally to retain target area
Point cloud data.
Compared with prior art, the beneficial effect of the disclosure is:
(1) disclosure is introduced directly into corresponding software processing, is had preferable by the point cloud data of acquisition target area
Operational and practical, solving existing geotechnical model structural plane production needs field structure surface sample, sampling difficulty, laboratory test week
Phase it is long and your the deficiencies of the problem of.
(2) disclosure also uses the point cloud data that three-dimensional laser scanning technique obtains target area, and then beats in conjunction with 3D
Print technology realizes virtual data material object, while being not required to carry out structural plane sampling in situ, ensure that the complete of rock mass structure
Property, there is stronger scientific research value and practical engineering value.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is an a kind of embodiment flow chart of structure noodle producing method of the disclosure.
Fig. 2 is a kind of another embodiment flow chart of structure noodle producing method of the disclosure.
Fig. 3 is a kind of example structure schematic diagram of structural plane preparation system of the disclosure.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Fig. 1 is an a kind of embodiment flow chart of structure noodle producing method of the disclosure.
As shown in Figure 1, a kind of structure noodle producing method of the offer of the present embodiment, comprising:
S110: the point cloud data and target area image of target area are obtained.
Predeterminable area in target area disposes three-dimensional laser scanning system, avoids the occurrence of scan blind spot, and be suitble to placement
Instrument obtains the point cloud data of target area to target area entirety fine scanning.
In specific implementation, in order to improve the precision and efficiency that data acquire, FARO is can be selected in three-dimensional laser scanning system
Focus3D x330 three-dimensional laser scanner.The main feature of the three-dimensional laser scanner has: scanning speed is fast, scanning range
Greatly, scanning maximum distance is up to 330m；Scanning accuracy is high, and the noise of generation is few；Can remotely be controlled by WLAN starting,
Stop, checking or download scanning.
It should be noted that according to actual needs, the three-dimensional laser of other models can also be used in three-dimensional laser scanning system
Scanner.
In specific implementation, when three-dimensional laser scanning system scanning target area, the lap of front and back twice sweep is accounted for
The 20~30% of whole image.
If the ratio that the lap of front and back twice sweep accounts for whole image is excessive, three-dimensional laser scanning system is used
Quantity can increase, waste three-dimensional laser scanning system resource；If the lap of front and back twice sweep accounts for the ratio of whole image
Example is too small, then will appear scan blind spot, to influence to judge the accuracy in potential structure face in target area, cannot obtain all
Potential structure face.
Specifically, using digital camera photographic subjects region, it can get target area image.
S120: being compared using the shading value and colouring information of the point cloud data of target area with target area image,
Judge all potential structure faces in target area.
Specifically, according to the structural plane of exposure in target area image, the point cloud data of corresponding position is found, according to corresponding
The shading value and color of position point cloud data judge potential structure face all in target area.
S130: the relevant parameter in all potential structure faces is obtained, and establishes structural plane three-dimensional digitalization model.
Point cloud data is imported into CAD software, and then measures the relevant parameter in all potential structure faces.
Wherein, the relevant parameter of structural plane includes occurrence, length, spacing and connected ratio.
S140: importing 3D printer for structural plane three-dimensional digitalization model, completes structural plane model printing.
Structural plane three-dimensional digital mould is established according to the structural plane relevant parameter of target area precision point cloud data and measurement
Type, structural plane three-dimensional digitalization model can be established before importing 3D printer, can also be established later.
Specifically, structural plane three-dimensional digitalization model is imported into 3D printer with the file format of .STL, in control software
Middle Unclosing structure face three-dimensional digitalization model adjusts optimal printing according to structural plane model size and model support surface condition
Position.Using analog material, 3D printer carries out layering processing to structural plane model, superposition forms, and structural plane model has printed
At.
Fig. 2 is a kind of another embodiment flow chart of structure noodle producing method of the disclosure.
As shown in Fig. 2, a kind of structure noodle producing method of the offer of the present embodiment, comprising:
S210: uniformly furnishing target target in target area, does the use of monitoring feature point.
Target target is equably furnished in target area, does the use of monitoring feature point, and guarantee that different times are ok
Accurate scan to monitoring target.
Wherein, the effect of monitoring feature point is: according to the changes in coordinates situation of the same monitoring feature point of different times, sentencing
Can the monitoring feature point be broken as the progress geodetic coordinates conversion of subsequent stability contorting point.
S220: the point cloud data and target area image of target area are obtained.
Predeterminable area in target area disposes three-dimensional laser scanning system, avoids the occurrence of scan blind spot, and be suitble to placement
Instrument obtains the point cloud data of target area to target area entirety fine scanning.
In specific implementation, in order to improve the precision and efficiency that data acquire, FARO is can be selected in three-dimensional laser scanning system
Focus3D x330 three-dimensional laser scanner.The main feature of the three-dimensional laser scanner has: scanning speed is fast, scanning range
Greatly, scanning maximum distance is up to 330m；Scanning accuracy is high, and the noise of generation is few；Can remotely be controlled by WLAN starting,
Stop, checking or download scanning.
It should be noted that according to actual needs, the three-dimensional laser of other models can also be used in three-dimensional laser scanning system
Scanner.
In specific implementation, when three-dimensional laser scanning system scanning target area, the lap of front and back twice sweep is accounted for
The 20~30% of whole image.
If the ratio that the lap of front and back twice sweep accounts for whole image is excessive, three-dimensional laser scanning system is used
Quantity can increase, waste three-dimensional laser scanning system resource；If the lap of front and back twice sweep accounts for the ratio of whole image
Example is too small, then will appear scan blind spot, to influence to judge the accuracy in potential structure face in target area, cannot obtain all
Potential structure face.
Specifically, using digital camera photographic subjects region, it can get target area image.
S230: carrying out whole splicing, coordinate is converted and reject point cloud data noise to the point cloud data of acquisition, final to protect
Stay target area precision point cloud data.
Specifically, during carrying out coordinate conversion to the point cloud data of acquisition, at least six is chosen in target area and is stablized
Control point.
In the present embodiment, for choosing 6 stability contorting points:
6 stability contorting points are chosen in target area, find out this seat of 6 stability contorting points under cloud scan coordinate system
Mark；
It measures the coordinate under this 6 stability contorting point earth coordinates and imports point cloud data system as reference data；
The point cloud data of each measurement point is uniformly converted into earth coordinates, for realizing the three-dimensional space of target area
Body is rebuild.
During rejecting point cloud data noise, according to noise Producing reason using different method removal point cloud numbers
Noise in retains the accurate point cloud data of target area.
S240: being compared using the shading value and colouring information of the point cloud data of target area with target area image,
Judge all potential structure faces in target area.
Specifically, according to the structural plane of exposure in target area image, the point cloud data of corresponding position is found, according to corresponding
The shading value and color of position point cloud data judge potential structure face all in target area.
S250: the relevant parameter in all potential structure faces is obtained, and establishes structural plane three-dimensional digitalization model.
Point cloud data is imported into CAD software, and then measures the relevant parameter in all potential structure faces.
Wherein, the relevant parameter of structural plane includes occurrence, length, spacing and connected ratio.
S260: importing 3D printer for structural plane three-dimensional digitalization model, completes structural plane model printing.
Structural plane three-dimensional digital mould is established according to the structural plane relevant parameter of target area precision point cloud data and measurement
Type, structural plane three-dimensional digitalization model can be established before importing 3D printer, can also be established later.
Specifically, structural plane three-dimensional digitalization model is imported into 3D printer with the file format of .STL, in control software
Middle Unclosing structure face three-dimensional digitalization model adjusts optimal printing according to structural plane model size and model support surface condition
Position.Using analog material, 3D printer carries out layering processing to structural plane model, superposition forms, and structural plane model has printed
At.
Fig. 3 is a kind of example structure schematic diagram of structural plane preparation system of the disclosure.
As shown in figure 3, a kind of structural plane preparation system of the present embodiment, comprising:
(1) processor is configured as following steps:
Obtain the point cloud data and target area image of target area；
It is compared, is judged with target area image using the shading value and colouring information of the point cloud data of target area
All potential structure faces in target area；
The relevant parameter in all potential structure faces is obtained, and establishes structural plane three-dimensional digitalization model；
(2) 3D printer is configured as:
Structural plane three-dimensional digitalization model data are received, structural plane model is printed.
In one or more embodiments, structural plane preparation system, further includes:
(3) three-dimensional laser scanning system is connected with processor, is configured as carrying out entire scan to target area to obtain
Obtain point cloud data.
In specific implementation, in order to improve the precision and efficiency that data acquire, FARO is can be selected in three-dimensional laser scanning system
Focus3D x330 three-dimensional laser scanner.The main feature of the three-dimensional laser scanner has: scanning speed is fast, scanning range
Greatly, scanning maximum distance is up to 330m；Scanning accuracy is high, and the noise of generation is few；Can remotely be controlled by WLAN starting,
Stop, checking or download scanning.
It should be noted that according to actual needs, the three-dimensional laser of other models can also be used in three-dimensional laser scanning system
Scanner.
In specific implementation, when three-dimensional laser scanning system scanning target area, the lap of front and back twice sweep is accounted for
The 20~30% of whole image.
If the ratio that the lap of front and back twice sweep accounts for whole image is excessive, three-dimensional laser scanning system is used
Quantity can increase, waste three-dimensional laser scanning system resource；If the lap of front and back twice sweep accounts for the ratio of whole image
Example is too small, then will appear scan blind spot, to influence to judge the accuracy in potential structure face in target area, cannot obtain all
Potential structure face.
In one or more embodiments, the processor, is also configured to
Before the point cloud data and the target area image that obtain target area, target target is uniformly furnished in target area,
Do the use of monitoring feature point.
In one or more embodiments, the processor, is also configured to
It is right before being compared using the shading value and colouring information and target area image of the point cloud data of target area
The point cloud data of acquisition carries out whole splicing, coordinate conversion and rejects point cloud data noise, and it is accurate finally to retain target area
Point cloud data.
Specifically, during carrying out coordinate conversion to the point cloud data of acquisition, at least six is chosen in target area and is stablized
Control point.
In the present embodiment, for choosing 6 stability contorting points:
6 stability contorting points are chosen in target area, find out this seat of 6 stability contorting points under cloud scan coordinate system
Mark；
It measures the coordinate under this 6 stability contorting point earth coordinates and imports point cloud data system as reference data；
The point cloud data of each measurement point is uniformly converted into earth coordinates, for realizing the three-dimensional space of target area
Body is rebuild.
During rejecting point cloud data noise, according to noise Producing reason using different method removal point cloud numbers
Noise in retains the accurate point cloud data of target area.
The three-dimensional laser scanning technique that the disclosure uses is contactless high-rate laser measurement method, can quickly be obtained
The three-dimensional space data and image data of measured target, and three dimension laser scanning surreying is not influenced by time, space and environment,
Non-contact scanning will not destroy rock mass structure, compensate for the defect of traditional geological survey.The point cloud data of acquisition can be with simultaneously
It is introduced directly into analytical calculation in the professional softwares such as CAD or ANSYS.In addition, 3D printing technique is a kind of rapid shaping technique, with number
Based on word model file, with some materials, constructs object by layer-by-layer printing, realize that virtual data is in kind
Change.
The disclosure is introduced directly into corresponding software processing, has preferable behaviour by the point cloud data of acquisition target area
The property made and practical, solving existing geotechnical model structural plane production needs that field structure surface sample, sampling be difficult, the laboratory test period
It is long and your the deficiencies of the problem of.
The disclosure also uses the point cloud data that three-dimensional laser scanning technique obtains target area, and then combines 3D printing skill
Art realizes virtual data material object, while being not required to carry out structural plane sampling in situ, ensure that the integrality of rock mass structure, tool
There are stronger scientific research value and practical engineering value.
It should be understood by those skilled in the art that, embodiment of the disclosure can provide as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the disclosure
Formula.Moreover, the disclosure, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The disclosure be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random
AccessMemory, RAM) etc..
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (10)
1. a kind of structure noodle producing method characterized by comprising
Obtain the point cloud data and target area image of target area；
It is compared using the shading value and colouring information of the point cloud data of target area with target area image, judges target
All potential structure faces in region；
The relevant parameter in all potential structure faces is obtained, and establishes structural plane three-dimensional digitalization model；
Structural plane three-dimensional digitalization model is imported into 3D printer, completes structural plane model printing.
2. a kind of structure noodle producing method as described in claim 1, which is characterized in that in the point cloud data for obtaining target area
Before target area image, further includes:
Target target is uniformly furnished in target area, does the use of monitoring feature point.
3. a kind of structure noodle producing method as described in claim 1, which is characterized in that utilize the point cloud data of target area
Before shading value and colouring information and target area image compare, further includes:
Whole splicing, coordinate conversion are carried out to the point cloud data of acquisition and reject point cloud data noise, finally retains target area
Domain precision point cloud data.
4. a kind of structure noodle producing method as claimed in claim 3, which is characterized in that carry out coordinate to the point cloud data of acquisition
The process of conversion includes:
At least six stability contorting point is chosen in target area, finds out this seat of 6 stability contorting points under cloud scan coordinate system
Mark；
It measures the coordinate under 6 stability contorting point earth coordinates and imports point cloud data system as reference data；
The point cloud data of each measurement point is uniformly converted into earth coordinates, for realizing the three-dimensional space body of target area
It rebuilds.
5. a kind of structure noodle producing method as described in claim 1, which is characterized in that using three-dimensional laser scanning system to mesh
It marks region and carries out entire scan, obtain point cloud data.
6. a kind of structure noodle producing method as claimed in claim 5, which is characterized in that three-dimensional laser scanning system scans target
When region, the lap of front and back twice sweep accounts for the 20~30% of whole image.
7. a kind of structure noodle producing method as described in claim 1, which is characterized in that point cloud data is imported into CAD software, into
And measure the relevant parameter in all potential structure faces；
Or the relevant parameter of structural plane includes occurrence, length, spacing and connected ratio.
8. a kind of structural plane preparation system characterized by comprising
Processor is configured as following steps:
Obtain the point cloud data and target area image of target area；
It is compared using the shading value and colouring information of the point cloud data of target area with target area image, judges target
All potential structure faces in region；
The relevant parameter in all potential structure faces is obtained, and establishes structural plane three-dimensional digitalization model；
3D printer is configured as:
Structural plane three-dimensional digitalization model data are received, structural plane model is printed.
9. a kind of structural plane preparation system as claimed in claim 8, which is characterized in that further include:
Three-dimensional laser scanning system is connected with processor, is configured as carrying out entire scan to target area to obtain a cloud
Data.
10. a kind of structural plane preparation system as claimed in claim 8, which is characterized in that the processor is also configured to
Before the point cloud data and the target area image that obtain target area, target target is uniformly furnished in target area, is supervised
Characteristic point is surveyed to use；
Or the processor, it is also configured to
Before being compared using the shading value and colouring information and target area image of the point cloud data of target area, to acquisition
Point cloud data carry out whole splicing, coordinate conversion and reject point cloud data noise, it is final to retain target area precision point cloud
Data.
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| CN113252430A (en) * | 2020-02-12 | 2021-08-13 | 中国石油天然气股份有限公司 | Three-dimensional physical model manufacturing method and system |
| CN113252430B (en) * | 2020-02-12 | 2022-12-02 | 中国石油天然气股份有限公司 | Three-dimensional physical model making method and system |
| CN112304216A (en) * | 2020-09-30 | 2021-02-02 | 中电建冀交高速公路投资发展有限公司 | Rock mass information acquisition test system based on 3D printing model and verification method thereof |
| CN112304216B (en) * | 2020-09-30 | 2022-04-08 | 中电建冀交高速公路投资发展有限公司 | Rock mass information acquisition test system based on 3D printing model and verification method thereof |
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