CN108333057A - A kind of lever coal petrography long time creep test device - Google Patents
A kind of lever coal petrography long time creep test device Download PDFInfo
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- CN108333057A CN108333057A CN201810413926.1A CN201810413926A CN108333057A CN 108333057 A CN108333057 A CN 108333057A CN 201810413926 A CN201810413926 A CN 201810413926A CN 108333057 A CN108333057 A CN 108333057A
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- swing arm
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 abstract description 6
- 239000011435 rock Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 231100000749 chronicity Toxicity 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/16—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces applied through gearing
- G01N3/165—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces applied through gearing generated by rotation, i.e. centrifugal force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0037—Generation of the force using mechanical means involving a rotating movement, e.g. gearing, cam, eccentric, or centrifuge effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of lever coal petrography long time creep test device, the wherein upper surface of pedestal is installed with reaction frame, front support rod and back support rod side by side；The top surface of guide plate is provided with guide collar；The lower end of push rod is connected with piston；The lower end of piston is connected with polishing head；The upper end of first supporting vertical plate is equipped with driving gear by first bearing；The upper end of second supporting vertical plate is equipped with guide gear by second bearing；It is fixed with rack on the side of push rod；Mutually ratcheting connection between rack and driving gear；Back and front supporting bar is connected with forward and backward swing arm by forward and backward rotation axis respectively；Chain is connected after bypassing driving gear, guide gear successively with the front end of front swing arm；Circular hole is hung with scale pan by rope.The present invention provides a kind of experiment counterweight simplicity, multi-stag load structure, experiment load is reliable and stable, the test period shortens and the lever coal petrography long time creep test device of avoidable load offset.
Description
Technical field
The present invention relates to technical field of test equipment, and in particular to a kind of lever coal petrography long time creep test device.
Background technology
With the increasingly depleted of China's superficial part coal resources, exploitation of coal resources is gradually shifted to deep, and deep highland is answered
Coal and rock shows strong creep properties under force effect, causes roadway surrounding rock that rheology large deformation destruction easily occurs.Therefore, carry out deep
Coal and rock long time creep test is studied, and the creep rupture characteristic of coal petrography is probed into, for conscientious deep laneway surrounding rock Rheological Instability machine
Reason improves deep laneway surrounding rock stability control effect and has great importance.
Domestic and foreign scholars have carried out a large amount of laboratory test research to coal and rock creeping characteristic at present, due to rheological behavior of surrounding rocks
Chronicity and persistence, creep of rock experiment is generally time-consuming longer, when common rock servo test system is difficult to realize very long
Between guarantor carry, and it is also larger to the loss of testing equipment.Creep test device based on lever principle can be very good to overcome
Difficulty is stated, the concern and application of numerous domestic student has been obtained.
In the prior art, " a kind of lever creep testing machine " discloses a kind of lever creep testing machine, main to use
In the tensile test for carrying out sample, it is ensured that the long-time creep test of sample, but can by lever-loading principle
Know, when using lever-loading, with the increase of sample deformation, the phenomenon that the moving down of lever-loading point can lead to load offset, into
And test result is caused to generate large error, foregoing invention patent does not overcome this point, and foregoing invention uses primary lever,
It is limited to the amplification factor of load..
Invention content
A kind of experiment counterweight simplicity, the multi-stag load provided the invention aims to overcome the deficiencies in the prior art
Structure, experiment load is reliable and stable, the test period shortens and the lever coal petrography long time creep test dress of avoidable load offset
It sets.
In order to achieve the above objectives, the present invention adopts the following technical scheme that.
A kind of lever coal petrography long time creep test device of the present invention, including pedestal, reaction frame, front support rod, rear branch
Strut, hollow layer, the first supporting vertical plate, the second supporting vertical plate, fixing bolt, guide plate, guide collar, push rod, piston cylinder, experiment
It is platform, piston, polishing head, test specimen, driving gear, guide gear, first bearing, second bearing, rack, chain, preceding rotation axis, preceding
Swing arm, rear rotation axis, rear-swing arm, suppending hole, rope, scale pan and convex block, the upper surface of the pedestal are installed with side by side
Reaction frame, front support rod and back support rod；The lower part of the reaction frame is hollow layer；The upper surface of the reaction frame is fixed with
One supporting vertical plate and the second supporting vertical plate；The guide plate is connected to the top of the reaction frame by fixing bolt；It is described to lead
The top surface of plate is provided with guide collar；Push rod is installed in the guide collar；The lower end of the push rod is connected with piston；Institute
That states reaction frame is internally provided with piston cylinder；The piston is slidably mounted in the piston cylinder；The lower end of the piston connects
There is polishing head；It is provided with testing stand immediately below the piston cylinder；It is placed with test specimen on the testing stand；First support is vertical
The upper end of plate is equipped with driving gear by first bearing；The upper end of second supporting vertical plate is equipped with by second bearing leads
To gear；It is fixed with rack on the side of the push rod；Mutually ratcheting connection between the rack and the driving gear；Before described
Supporting rod is connected with front swing arm by preceding rotation axis；It is put after being connected with by rear rotation axis on the top of the back support rod
Arm；The chain is connected after bypassing driving gear, guide gear successively with the front end of front swing arm；Before the rear-swing arm passes through
The end bottom of the convex block and the front swing arm of end surface setting mutually agitates contact connectio；The end of the rear-swing arm is provided with
Circular hole；The circular hole is hung with scale pan by rope.
As a further improvement on the present invention, the height of second supporting vertical plate is more than the height of first supporting vertical plate
Degree, the height of the front support rod are more than the height of the back support rod.
As a further improvement on the present invention, the side wall of the front support rod and back support rod is both provided with arc cunning
The lower surface of rail, the front swing arm and rear-swing arm is both provided with arc lower sliding rail, the lower surface of the upper arc-shaped slide rail and lower arc
The mutual sliding contact in upper surface of shape sliding rail.
As a further improvement on the present invention, the diameter dimension of the guide gear is more than the diameter ruler of the driving gear
It is very little, and the guide gear is identical with the driving tooth pitch size of gear.
As a further improvement on the present invention, the convex block is semicircle spherical shape fulcrum.
Due to the application of the above technical scheme, effective effect that the present invention is brought：
(1) the technical program is on pedestal by using being arranged reaction frame and back and front supporting bar, and on front and back supporting rod
It is respectively provided with front and back swing arm, the end of front swing arm is mutually connected with the front end of rear-swing arm, thus may be implemented by having height
It spends two gears of difference and is driven by chain, then realize that the application to push rod and piston is permanent by the rack on push rod
The size of constant-pressure, pressure is then adjusted by adding counterweight weight on the scale pan of end, is had ingenious with lever principle
Constant applied force is generated, pressure, which applies, to be stablized and adjust easy advantageous effects；
(2) also by using guide plate guide collar is arranged, and be arranged on reaction frame and live in the technical program on guide plate
Plug cylinder and piston may be implemented to be oriented the push rod being fitted into this way, have be oriented to it is reliable and stable, avoid pressurization when it is inclined
Shift error, the advantageous effects for improving test result accuracy；
(3) the technical program is also mutually matched the upper arc being slidably connected cunning using on supporting rod and swing arm by setting
Rail and arc lower sliding rail, having can prevent front and back swing arm in the stabilization for testing the front and back supporting rod that shifts, ensures when pressurization
Advantageous effects；
(4) the technical program is the cooperation by lever and gear, on the one hand realizes and amplifies to the multistage of weight load, carries
The high amplification factor of load, the chain between another aspect lever and gear is flexible coupling when overcoming directly using lever-loading
Load offset problem, clear thinking of the present invention, operability is strong, for coal petrography long-term creep characteristic research provide it is important
Experimental rig has important theoretical significance.
Description of the drawings
Technical scheme of the present invention is further explained below in conjunction with the accompanying drawings.
Attached drawing 1 is the overall structure diagram of the present invention.
In figure：Pedestal 1, reaction frame 2, front support rod 3, back support rod 4, hollow layer 5, the support of the first supporting vertical plate 6, second
Riser 7, fixing bolt 8, guide plate 9, guide collar 10, push rod 11, piston cylinder 12, testing stand 13, piston 14, polishing head 15, examination
It is part 16, driving gear 17, guide gear 18, first bearing 19, second bearing 20, rack 21, chain 22, preceding rotation axis 23, preceding
Swing arm 24, rear rotation axis 25, rear-swing arm 26, suppending hole 27, rope 28, scale pan 29, convex block 30.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment invention is further described in detail.
As shown in Figure 1, a kind of lever coal petrography long time creep test device of the present invention, including it is pedestal 1, reaction frame 2, preceding
Supporting rod 3, hollow layer 5, the first supporting vertical plate 6, the second supporting vertical plate 7, fixing bolt 8, guide plate 9, is oriented to back support rod 4
Circle 10, push rod 11, piston cylinder 12, testing stand 13, piston 14, polishing head 15, test specimen 16, driving gear 17, guide gear 18, the
One bearing 19, rack 21, chain 22, preceding rotation axis 23, front swing arm 24, rear rotation axis 25, rear-swing arm 26, hangs at second bearing 20
The upper surface of hanging hole 27, rope 28, scale pan 29 and convex block 30, the pedestal 1 is installed with reaction frame 2, front support side by side
Bar 3 and back support rod 4；The lower part of the reaction frame 2 is hollow layer 5；It is vertical that the upper surface of the reaction frame 2 is fixed with the first support
Plate 6 and the second supporting vertical plate 7；The guide plate 9 is connected to the top of the reaction frame 2 by fixing bolt 8；The guide plate
9 top surface is provided with guide collar 10；Push rod 11 is installed in the guide collar 10；The lower end of the push rod 11 is connected with work
Plug 14；The reaction frame is internally provided with piston cylinder 12；The piston 14 is slidably mounted in the piston cylinder 12；The work
The lower end of plug 14 is connected with polishing head 15；The underface of the piston cylinder 12 is provided with testing stand 13；It is put on the testing stand 13
It is equipped with test specimen 16；The upper end of first supporting vertical plate 6 is equipped with driving gear 17 by first bearing 19；Second support
The upper end of riser 7 is equipped with guide gear 18 by second bearing 20；Rack 21 is fixed on the side of the push rod 11；It is described
Mutually ratcheting connection between rack 21 and the driving gear 17.
The front support rod 3 is connected with front swing arm 24 by preceding rotation axis 23；The top of the back support rod 4 passes through
Rotation axis 25 is connected with rear-swing arm 26 afterwards；The chain 22 bypass successively driving gear 17, after guide gear 18 with front swing arm 24
Front end be connected；The end bottom for the convex block 30 and the front swing arm 24 that the rear-swing arm 26 is arranged by front end surface
Mutually agitate contact connectio；The end of the rear-swing arm 26 is provided with circular hole 27；The circular hole 27 is hung with scale pan by rope
29。
The height of second supporting vertical plate 7 is more than the height of first supporting vertical plate 6, the height of the front support rod 3
Height of the degree more than the back support rod 4.
The side wall of the front support rod 3 and back support rod 4 is both provided with arc-shaped slide rail 31, the front swing arm 24 and rear pendulum
The lower surface of arm 26 is both provided with arc lower sliding rail 32, the upper table of the lower surface and arc lower sliding rail 32 of the upper arc-shaped slide rail 31
The mutual sliding contact in face.
The diameter dimension of the guide gear 18 is more than the diameter dimension of the driving gear 17, and the guide gear 18
It is identical with the driving tooth pitch size of gear 17.
The convex block 30 is semicircle spherical shape fulcrum.
The specific application example that the above is only the present invention, is not limited in any way protection scope of the present invention；All uses
Equivalent transformation or equivalent replacement and the technical solution formed, all fall within rights protection scope of the present invention.
Claims (5)
1. a kind of lever coal petrography long time creep test device, it is characterised in that：Including pedestal（1）, reaction frame（2）, front support
Bar（3）, back support rod（4）, hollow layer（5）, the first supporting vertical plate（6）, the second supporting vertical plate（7）, fixing bolt（8）, be oriented to
Plate（9）, guide collar（10）, push rod（11）, piston cylinder（12）, testing stand（13）, piston（14）, polishing head（15）, test specimen（16）、
Drive gear（17）, guide gear（18）, first bearing（19）, second bearing（20）, rack（21）, chain（22）, preceding rotation
Axis（23）, front swing arm（24）, rear rotation axis（25）, rear-swing arm（26）, suppending hole（27）, rope（28）, scale pan（29）With it is convex
Block（30）, the pedestal（1）Upper surface be installed with reaction frame side by side（2）, front support rod（3）And back support rod（4）；Institute
State reaction frame（2）Lower part be hollow layer（5）；The reaction frame（2）Upper surface be fixed with the first supporting vertical plate（6）With second
Supporting vertical plate（7）；The guide plate（9）Pass through fixing bolt（8）It is connected to the reaction frame（2）Top；The guide plate
（9）Top surface be provided with guide collar（10）；The guide collar（10）Push rod is inside installed（11）；The push rod（11）Under
End is connected with piston（14）；The reaction frame is internally provided with piston cylinder（12）；The piston（14）It is slidably mounted on described
Piston cylinder（12）It is interior；The piston（14）Lower end be connected with polishing head（15）；The piston cylinder（12）Underface be provided with
Testing stand（13）；The testing stand（13）On be placed with test specimen（16）；First supporting vertical plate（6）Upper end pass through first axle
It holds（19）Driving gear is installed（17）；Second supporting vertical plate（7）Upper end pass through second bearing（20）Guiding is installed
Gear（18）；The push rod（11）Side on be fixed with rack（21）；The rack（21）With the driving gear（17）It
Between mutually ratcheting connection；The front support rod（3）Pass through preceding rotation axis（23）It is connected with front swing arm（24）；The back support rod
（4）Top pass through rear rotation axis（25）It is connected with rear-swing arm（26）；The chain（22）Driving gear is bypassed successively（17）, lead
To gear（18）Afterwards with front swing arm（24）Front end be connected；The rear-swing arm（26）The convex block being arranged by front end surface
（30）With the front swing arm（24）End bottom mutually agitate contact connectio；The rear-swing arm（26）End be provided with circular hole
（27）；The circular hole（27）It is hung with scale pan by rope（29）.
2. a kind of lever coal petrography long time creep test device according to claim 1, it is characterised in that：Described second
Support riser（7）Height be more than first supporting vertical plate（6）Height, the front support rod（3）Height be more than it is described after
Supporting rod（4）Height.
3. a kind of lever coal petrography long time creep test device according to claim 1, it is characterised in that：The front support
Bar（3）And back support rod（4）Side wall be both provided with arc-shaped slide rail（31）, the front swing arm（24）And rear-swing arm（26）Under
Surface is both provided with arc lower sliding rail（32）, the upper arc-shaped slide rail（31）Lower surface and arc lower sliding rail（32）Upper surface
Mutual sliding contact.
4. a kind of lever coal petrography long time creep test device according to claim 1, it is characterised in that：The guiding tooth
Wheel（18）Diameter dimension be more than the driving gear（17）Diameter dimension, and the guide gear（18）With driving gear
（17）Tooth pitch size it is identical.
5. a kind of lever coal petrography long time creep test device according to claim 1, it is characterised in that：The convex block
（30）For semicircle spherical shape fulcrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413926.1A CN108333057B (en) | 2018-05-03 | 2018-05-03 | Lever type coal rock long-term creep test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413926.1A CN108333057B (en) | 2018-05-03 | 2018-05-03 | Lever type coal rock long-term creep test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108333057A true CN108333057A (en) | 2018-07-27 |
| CN108333057B CN108333057B (en) | 2024-02-02 |
Family
ID=62934575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810413926.1A Active CN108333057B (en) | 2018-05-03 | 2018-05-03 | Lever type coal rock long-term creep test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108333057B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112475214A (en) * | 2020-11-09 | 2021-03-12 | 浙江浦江伯虎链条股份有限公司 | Lever cutting integrated machine |
| CN114047076A (en) * | 2022-01-10 | 2022-02-15 | 江苏帝标工业科技有限公司 | Swing arm intensity detection device under car |
| CN114608935A (en) * | 2022-03-28 | 2022-06-10 | 武汉大学 | Rock multi-field coupling loading test system and method |
| CN115628976A (en) * | 2022-10-24 | 2023-01-20 | 陈松涛 | Building material strength detection system and detection method |
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| CN101493388A (en) * | 2008-12-30 | 2009-07-29 | 中国矿业大学(北京) | Gravity hydraulic dead load energy-saving equipment and true triaxial creep experiment system |
| CN103760027A (en) * | 2014-01-02 | 2014-04-30 | 重庆大学 | Continuous and constant pressure rheological test device for coal rocks |
| CN106969958A (en) * | 2017-04-24 | 2017-07-21 | 河南理工大学 | Coal and rock test specimen different angle structural plane cutting technique |
| CN107030899A (en) * | 2017-04-24 | 2017-08-11 | 河南理工大学 | Coal and rock test specimen different angle structural plane cutter device |
| CN107843502A (en) * | 2017-10-25 | 2018-03-27 | 辽宁工程技术大学 | A kind of energetic disturbance creep of rock testing machine and test method based on multi- scenarios method |
| CN208270341U (en) * | 2018-05-03 | 2018-12-21 | 山东科技大学 | A kind of lever coal petrography long time creep test device |
-
2018
- 2018-05-03 CN CN201810413926.1A patent/CN108333057B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493388A (en) * | 2008-12-30 | 2009-07-29 | 中国矿业大学(北京) | Gravity hydraulic dead load energy-saving equipment and true triaxial creep experiment system |
| CN103760027A (en) * | 2014-01-02 | 2014-04-30 | 重庆大学 | Continuous and constant pressure rheological test device for coal rocks |
| CN106969958A (en) * | 2017-04-24 | 2017-07-21 | 河南理工大学 | Coal and rock test specimen different angle structural plane cutting technique |
| CN107030899A (en) * | 2017-04-24 | 2017-08-11 | 河南理工大学 | Coal and rock test specimen different angle structural plane cutter device |
| CN107843502A (en) * | 2017-10-25 | 2018-03-27 | 辽宁工程技术大学 | A kind of energetic disturbance creep of rock testing machine and test method based on multi- scenarios method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112475214A (en) * | 2020-11-09 | 2021-03-12 | 浙江浦江伯虎链条股份有限公司 | Lever cutting integrated machine |
| CN114047076A (en) * | 2022-01-10 | 2022-02-15 | 江苏帝标工业科技有限公司 | Swing arm intensity detection device under car |
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| CN114608935A (en) * | 2022-03-28 | 2022-06-10 | 武汉大学 | Rock multi-field coupling loading test system and method |
| CN115628976A (en) * | 2022-10-24 | 2023-01-20 | 陈松涛 | Building material strength detection system and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108333057B (en) | 2024-02-02 |
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