CN116201093A - Roadbed compactness check out test set - Google Patents
Roadbed compactness check out test set Download PDFInfo
- Publication number
- CN116201093A CN116201093A CN202310206451.XA CN202310206451A CN116201093A CN 116201093 A CN116201093 A CN 116201093A CN 202310206451 A CN202310206451 A CN 202310206451A CN 116201093 A CN116201093 A CN 116201093A
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- roadbed
- detection device
- compacting
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- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 238000005056 compaction Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000002344 surface layer Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention belongs to the field of road construction, and particularly relates to roadbed compactness detection equipment, which comprises a base arranged on a roadbed surface to be detected, wherein a compacting mechanism comprises a test groove arranged on the base, and a compacting plate is arranged in the test groove; the driving hammer mechanism is controlled to fall downwards or rise upwards through the work of the pulley mechanism, the falling impact force of the driving plate is enabled to be uniformly acted on the compacting plate to impact through the auxiliary guiding of the upright post and the reduction of contact friction, the compaction degree data value conversion is carried out after the feedback of the receiving force of the measuring instrument arranged on the driving plate is received, the steps are repeated for carrying out multiple measurement, the average value of the multiple data is taken as the final data of the compaction degree detection, and the problem that errors are easy to occur in manual measurement is solved; the design of the calibration mechanism can analyze the distance of the compaction plate sinking into the roadbed surface layer under single impact through the high-point position change of the calibration piece of the front photo and the rear photo, and provide displacement reference data except the force feedback data of the tester.
Description
Technical Field
The invention relates to the field of road construction, in particular to roadbed compactness detection equipment.
Background
The roadbed compactness is one of key indexes for detecting the construction quality of roadbed and pavement, the density condition after the on-site compaction is represented, the higher the compactness is, the higher the density is, the overall performance of the material is, the traditional inspection generally adopts a ring cutter method, a sand filling method, a nuclear densimeter method and the like, the road base layer is required to be sampled so as to cause on-site damage, the limitation is large, the novel spectrum type roadbed compactness rapid tester utilizes the impact of a drop hammer to enable soil body to generate rebound force, and utilizes low frequency to measure the moisture content of the soil body response value, so that the tester for the roadbed compactness can be obtained, and the roadbed damage to a detection area is small.
The prior art has the following problems:
1. when roadbed compactness is checked through a spectrum roadbed compactness rapid tester, the degree of compaction of the plate is required to be balanced every time when the plate is impacted, the number of times of hammering is not less than three, the existing hammering device is mostly used for manually falling down the plate, and the falling force and the falling direction have offset hidden dangers, so that the detected data error is larger, and the judgment of the compactness of workers is affected;
2. the impact plate piece makes its appearance of pressing down in roadbed layer department at impact compaction plate, in subsequent detection, because of impact plate piece interval increase of falling, leads to compaction plate contact impact force unbalanced, and the data error of measurement is great, influences the judgement of staff to the compactness.
Disclosure of Invention
Object of the invention
In order to solve the technical problems in the background art, the invention provides roadbed compactness detection equipment, which is used for assisting in guiding in the action of a striking plate falling hammer, ensuring that a single point position hammer is used for improving the accuracy of detection data, setting a calibration mechanism to obtain the displacement distance of the compacting plate so as to obtain the compaction amplitude reference quantity of the compactness, assisting in controlling the falling distance of the striking plate to ensure the balance of compaction impact force, and has the characteristics of convenience in use and accuracy in measurement.
(II) technical scheme
In order to solve the technical problems, the invention provides roadbed compactness detection equipment, which comprises a base arranged on a roadbed surface to be detected, wherein a compacting mechanism comprises a test groove arranged on the base, and a compacting plate is arranged in the test groove;
a through upright post is arranged above the test groove, a guide table is arranged at the corner of the upright post, a chute is arranged on the inner wall of the guide table, and a raised convex edge strip is formed on the side edge of the chute;
the pulley mechanism comprises a suspension frame arranged above the upright post, a fixed pulley is arranged at the lower part of the suspension frame, a convex rope hook is arranged at the lower part of the fixed pulley, a movable pulley is arranged below the fixed pulley, a hanging bracket is arranged at the bottom of the fixed pulley, a wheel disc shaft bracket arranged on the base is arranged at one side of the movable pulley, a winding wheel disc is arranged in the wheel disc shaft bracket, a rope shaft penetrates through the wheel disc shaft bracket, one end of the rope shaft is connected to the output end of the driving device, and a rope sequentially penetrating through the fixed pulley and the movable pulley is coiled on the outer wall of the rope shaft;
the hammer mechanism comprises a hanging plate arranged at the bottom of the hanging frame, a striking plate is arranged below the hanging plate, a measuring instrument is arranged at the top of the striking plate, a protruding bearing frame is arranged at the corner of the hanging plate, and a rotatable bearing is arranged in the bearing frame.
Preferably, the striking plate, the upright post and the compacting plate are arranged in parallel, and each structure is centrosymmetric.
Preferably, the edge of the bearing is attached to the sliding groove and the convex edge strip clamping surface, and the bearing slides relative to the sliding groove.
Preferably, the end of the rope remote from the rope shaft is fixed to the rope hook.
Preferably, the movable pulley ascends or descends synchronously with winding and unwinding of the rope, and the falling distance of the movable pulley relative to the fixed pulley is an impact distance.
Preferably, a notch is formed in the side wall of the upright post, and the specification of the notch is larger than that of the compacting plate.
Preferably, the compacting mechanism further comprises a calibration support formed at the edge of the compacting plate, and a calibration piece for assisting calibration is formed at the top of the calibration support.
Preferably, the calibration mechanism comprises a distance-adjusting track arranged on the base, a sliding piece is slidably arranged in the distance-adjusting track, a high-speed camera is arranged at the top of the sliding piece, and an optical lens is formed on the end face of the high-speed camera, facing the upright post notch.
Preferably, protruding limiting pieces are symmetrically arranged on two sides of the high-speed camera, and the high-speed camera and the movable end face of the distance adjusting rail are locked through the limiting pieces.
Preferably, the terminal device connected with the high-speed camera in a wireless way is in communication connection with the driving device.
The technical scheme of the invention has the following beneficial technical effects:
1. through pulley mechanism's work, control hammer mechanism falls downwards or rise upwards, through the auxiliary direction of stand and reduce contact friction, make the impact plate piece drop impact force balanced effect compact board impact, carry out compaction degree data numerical conversion after the feedback of the apparatus receiving force of installation on the impact plate piece, repeat above-mentioned step and carry out a lot of measurement, get the mean value of a lot of data as the final data that compaction degree detected, solve the problem that the error easily appears in manual measurement.
2. The design of the calibration mechanism can analyze the distance of the compaction plate sinking into the roadbed surface layer under single impact through the high-point position change of the calibration piece of the front photo and the rear photo, and provide displacement reference data except the force feedback data of the tester;
3. through displacement reference data's change, send the instruction to drive arrangement and carry out the rope unreeling, make the striking piece of gallows below and compaction board at every turn strike the time interval the same, guarantee to strike the board and drop impact force and be in invariable, prevent to lead to impact distance change to influence impact force because of the compaction board subsidence, make the data that the apparatus survey keep accurate.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a portion of the structure of the present invention;
FIG. 3 is a schematic view of the mating structure of the compaction mechanism and the column of the present invention;
FIG. 4 is a schematic view of the compacting plate and base separation structure of the present invention;
FIG. 5 is a schematic diagram of a calibration mechanism separation structure of the present invention;
FIG. 6 is a schematic diagram of an embodiment of the present invention.
Reference numerals:
1. a base; 2. a column; 21. a guide table; 22. a chute; 23. a flange strip; 31. a test slot; 32. compacting the plate; 33. calibrating a support; 34. a calibration member; 41. a suspension; 42. a fixed pulley; 43. rope hook members; 44. a movable pulley; 45. a hanging bracket; 46. a rope; 47. a wheel disc shaft bracket; 48. a winding wheel disc; 49. a driving device; 51. a suspension plate; 52. a measuring instrument; 53. striking a plate; 54. a bearing bracket; 55. a bearing; 61. a distance-adjusting track; 62. a slider; 63. a limiting piece; 64. a high-speed camera; 65. an optical lens.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
Example 1
As shown in fig. 1-6, the roadbed compactness detection device provided by the invention comprises a base 1 arranged on a roadbed surface to be detected, a compacting mechanism comprises a test groove 31 arranged on the base 1, and a compacting plate 32 is arranged in the test groove 31;
a through upright post 2 is arranged above the test groove 31, a guide table 21 is arranged at the corner of the upright post 2, a chute 22 is arranged on the inner wall of the guide table 21, and a convex flange strip 23 is formed on the side edge of the chute 22;
the pulley mechanism comprises a suspension 41 arranged above the upright post 2, a fixed pulley 42 is arranged at the lower part of the suspension 41, a convex rope hook piece 43 is arranged at the lower part of the fixed pulley 42, a movable pulley 44 is arranged at the lower part of the fixed pulley 42, a hanging bracket 45 is arranged at the bottom of the fixed pulley 42, a wheel disc shaft bracket 47 arranged on the base 1 is arranged at one side of the movable pulley 44, a winding wheel disc 48 is arranged in the wheel disc shaft bracket 47, a rope shaft penetrates through the wheel disc shaft bracket 47, one end of the rope shaft is connected to the output end of a driving device 49, a rope 46 sequentially penetrating through the fixed pulley 42 and the movable pulley 44 is coiled on the outer wall, and one end of the rope 46 far away from the rope shaft is fixed on the rope hook piece 43;
the hammer mechanism comprises a suspension plate 51 arranged at the bottom of the hanging bracket 45, a striking plate 53 is arranged below the suspension plate 51, a measuring instrument 52 is arranged at the top of the striking plate 53, a protruding bearing bracket 54 is arranged at the corner of the suspension plate 51, and a rotatable bearing 55 is arranged in the bearing bracket 54.
It should be noted that: the striking plate 53, the upright post 2 and the compacting plate 32 are arranged in parallel, the striking plate 53 slides downwards along the inner cavity of the upright post 2, the falling striking plate 53 acts on the surface of the compacting plate 32 to perform downward impact, and the contact points are stressed uniformly because of the central symmetry of the structures.
In this embodiment, the hammer mechanism is controlled to fall down or rise up by the operation of the pulley mechanism, and the following falling process is taken as an example: the rope 46 coiled on the rope shaft in the winding wheel disc 48 is loosened, the movable pulley 44 moves towards one end far away from the fixed pulley 42 under the action of the rope 46, the hammer mechanism connected with the hanging frame 45 on the movable pulley 44 starts to fall, the hanging plate 51 is matched with the top opening specification of the upright post 2, the inner cavity of the upright post 2 is entered in the falling, at the moment, the bearing 55 arranged on the bearing bracket 54 at the corner of the hanging plate 51 enters the guide table 21, the edge of the bearing 55 is attached to the clamping surface of the sliding groove 22 and the convex edge strip 23, the bearing 55 rotates along the bearing bracket 54 in the process of contacting with the sliding groove 22 and slides relative to the sliding groove 22, in the falling process, the friction force at the contact position of the hanging plate 51 and the upright post 2 is rotationally dispersed by the bearing 55, so that the impact force at the bottom impact plate 53 keeps constant impacts the compacting plate 32, the compacting plate 32 falls to the roadbed testing layer along the testing groove 31, after the feedback of the receiving force of the tester 52 arranged on the impact plate 53, the steps are repeated, and the average value of the compaction data is measured for a plurality of times, and the average value of times is taken as final data of the compaction detection.
As shown in fig. 1-2, the movable pulley 44 ascends or descends in synchronization with winding and unwinding of the rope 46, and the falling distance of the movable pulley 44 relative to the fixed pulley 42 is an impact distance; when the fixed pulley and the movable pulley are assembled into the pulley block for use, the number of ropes 46 bypassing the movable pulley 44 can be increased, so that the resistance can be shared to more strands of ropes 46, thereby realizing the purpose of saving labor, and the plate hitting piece 53 can be conveniently lifted in a labor-saving state, and the following needs to be described: the impact plate member 53 is allowed to strike the compacting plate 32 at a constant pitch without being affected by the fixed sheave 42 when the movable sheave 44 is dropped.
As an example of the installation of the compacting plates 32 within the test slots 31: the side wall of the upright post 2 is provided with a notch, and the specification of the notch is larger than that of the compacting plate 32; the compacting plates 32 are placed into the test grooves 31 at the contact positions of the bottoms of the upright posts 2 and the base 1 along the notch positions of the upright posts 2, and the auxiliary compacting plates 32 are contacted with the roadbed surface layer.
Example two
As shown in fig. 3-6, the compacting mechanism further comprises a calibration support 33 formed at the edge of the compacting plate 32, the top of the calibration support 33 being formed with a calibration piece 34 for assisting calibration;
the calibration mechanism comprises a distance adjusting rail 61 arranged on the base 1, a sliding piece 62 is slidably arranged on the distance adjusting rail 61, a high-speed camera 64 is arranged on the top of the sliding piece 62, and an optical lens 65 is formed on the end face of the high-speed camera 64, facing the notch of the upright post 2.
In another embodiment, the calibration support 33 at the edge of the compacting plate 32 is provided with the calibration piece 34 for capturing images by the high-speed camera 64, and the optical lens 65 of the high-speed camera 64 can capture the height change of the calibration piece 34 on the compacting plate 32 before and after the impact through the notch of the upright post 2, so that the distance that the compacting plate 32 is sunk into the roadbed surface layer under the single impact can be analyzed through the high-point position of the calibration piece 34 of the front and rear photos, and displacement reference data besides the force feedback data of the measuring instrument 52 can be provided.
In an alternative embodiment, the high speed camera 64 is communicatively coupled between the wireless connected terminal device and the drive device 49; the reference data of the front and back displacement of the calibration piece 34 on the compacting plate 32 shot by the high-speed camera 64 are obtained through comparison of terminal equipment, the obtained displacement difference is transmitted to the controller of the driving device 49, the controller sends an instruction to the driving device 49 to unwind the rope 46, the distance between the striking plate 53 below the hanging bracket 45 and the compacting plate 32 is always the same, the falling impact force of the striking plate 53 is ensured to be constant, the impact force is prevented from being influenced by the impact distance change caused by the front and back falling of the compacting plate 32, and the data measured by the measuring instrument 52 is ensured to be accurate.
It should be noted that, the high-speed camera 64 is movably disposed on the base 1 and can be slidably mounted along the distance-adjusting track 61, and is close to or far away from the notch portion of the upright post 2, so that when the included angle between the optical lens 65 and the calibration member 34 is about 30 °, the average error in the front-back photographing plane is minimum, the fed back compacting plate 32 falls into the roadbed, the front-back distance difference is most accurate, and before each impact of the compacting plate 32, the included angle between the optical lens 65 and the calibration member 34 is adjusted to be about 30 °, so as to ensure the accuracy of displacement reference data.
In order to facilitate the positioning of the high-speed camera 64 after sliding, further, protruding limiting pieces 63 are symmetrically installed on two sides of the high-speed camera 64, and the movable end surfaces of the high-speed camera 64 and the distance adjusting rail 61 are locked through the limiting pieces 63.
Wherein, the locating part 63 of this application is the magnetism and inhales the structure, and the locating part 63 adsorbs the upper wall at the roll adjustment track 61, need not to add bolt structure, grafting structure and fixed knot structure and can carry out the position definition of high-speed camera 64.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (10)
1. The roadbed compactness detection device is characterized by comprising a base (1) arranged on a roadbed surface to be detected, wherein the compaction mechanism comprises a test groove (31) formed in the base (1), and a compaction plate (32) is arranged in the test groove (31);
a through upright post (2) is arranged above the test groove (31), a guide table (21) is arranged at the corner of the upright post (2), a chute (22) is formed in the inner wall of the guide table (21), and a convex flange strip (23) is formed on the side edge of the chute (22);
the pulley mechanism comprises a suspension frame (41) arranged above the upright post (2), a fixed pulley (42) is arranged at the lower part of the suspension frame (41), a convex rope hook piece (43) is arranged at the lower part of the fixed pulley (42), a movable pulley (44) is arranged below the fixed pulley, a hanging bracket (45) is arranged at the bottom of the fixed pulley (42), a wheel disc shaft bracket (47) arranged on the base (1) is arranged at one side of the movable pulley (44), a winding wheel disc (48) is arranged in the wheel disc shaft bracket (47), a rope shaft penetrates through the wheel disc shaft bracket, one end of the rope shaft is connected to the output end of a driving device (49), and a rope (46) sequentially penetrating through the fixed pulley (42) and the movable pulley (44) is coiled on the outer wall of the pulley;
the hammer mechanism comprises a hanging plate (51) arranged at the bottom of the hanging frame (45), a striking plate (53) is arranged below the hanging plate (51), a measuring instrument (52) is arranged at the top of the striking plate (53), a protruding bearing frame (54) is arranged at the corner of the hanging plate (51), and a rotatable bearing (55) is arranged in the bearing frame (54).
2. The roadbed compactness detection device according to claim 1, wherein the striking plate (53), the upright (2) and the compacting plate (32) are arranged in parallel, and the structures are centrosymmetric.
3. Roadbed compactness detection device according to claim 1, characterized in that the edge of the bearing (55) is attached to the clamping surface of the chute (22) and the flange strip (23), and the bearing (55) slides relative to the chute (22).
4. A subgrade compactness detection device according to claim 1, in which the end of the rope (46) remote from the rope axis is fixed to the rope hook (43).
5. The roadbed compactness detecting device according to claim 1, wherein the movable pulley (44) ascends or descends in synchronization with winding and unwinding of the rope (46), and the falling distance of the movable pulley (44) relative to the fixed pulley (42) is an impact distance.
6. The roadbed compactness detection device according to claim 1, wherein the side wall of the upright post (2) is provided with a notch, and the specification of the notch is larger than that of the compacting plate (32).
7. A roadbed compactness detection device according to claim 6, characterized in that the compacting means further comprise a calibration support (33) formed at the edge of the compacting plate (32), the top of the calibration support (33) being formed with a calibration piece (34) assisting in calibration.
8. The roadbed compactness detection device according to claim 7, wherein the calibration mechanism comprises a distance adjusting rail (61) arranged on the base (1), a sliding piece (62) is slidably arranged in the distance adjusting rail (61), a high-speed camera (64) is arranged at the top of the sliding piece (62), and an optical lens (65) is formed on the end face, facing the notch of the upright post (2), of the high-speed camera (64).
9. The roadbed compactness detection device according to claim 8, wherein protruding limiting pieces (63) are symmetrically arranged on two sides of the high-speed camera (64), and the high-speed camera (64) and the movable end face of the distance-adjusting rail (61) are locked through the limiting pieces (63).
10. A road bed compactness detection device according to claim 9, characterized in that the terminal device of the high-speed camera (64) is connected in a wireless communication with the driving means (49).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310206451.XA CN116201093A (en) | 2023-03-06 | 2023-03-06 | Roadbed compactness check out test set |
| NL2036750A NL2036750A (en) | 2023-03-06 | 2024-01-04 | Subgrade compactness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310206451.XA CN116201093A (en) | 2023-03-06 | 2023-03-06 | Roadbed compactness check out test set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116201093A true CN116201093A (en) | 2023-06-02 |
Family
ID=86519002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310206451.XA Pending CN116201093A (en) | 2023-03-06 | 2023-03-06 | Roadbed compactness check out test set |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116201093A (en) |
| NL (1) | NL2036750A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116397614A (en) * | 2023-06-08 | 2023-07-07 | 中国水利水电第七工程局有限公司 | Automatic location compactness nondestructive test car |
| CN116793864A (en) * | 2023-06-27 | 2023-09-22 | 郑晓明 | Roadbed compactness detection method for road detection |
-
2023
- 2023-03-06 CN CN202310206451.XA patent/CN116201093A/en active Pending
-
2024
- 2024-01-04 NL NL2036750A patent/NL2036750A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116397614A (en) * | 2023-06-08 | 2023-07-07 | 中国水利水电第七工程局有限公司 | Automatic location compactness nondestructive test car |
| CN116397614B (en) * | 2023-06-08 | 2023-08-29 | 中国水利水电第七工程局有限公司 | Automatic location compactness nondestructive test car |
| CN116793864A (en) * | 2023-06-27 | 2023-09-22 | 郑晓明 | Roadbed compactness detection method for road detection |
| CN116793864B (en) * | 2023-06-27 | 2024-04-02 | 郑晓明 | Roadbed compactness detection method for road detection |
Also Published As
| Publication number | Publication date |
|---|---|
| NL2036750A (en) | 2024-02-27 |
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