CN111855670A - Municipal road crack detection device and detection method - Google Patents
Municipal road crack detection device and detection method Download PDFInfo
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- CN111855670A CN111855670A CN202010715563.4A CN202010715563A CN111855670A CN 111855670 A CN111855670 A CN 111855670A CN 202010715563 A CN202010715563 A CN 202010715563A CN 111855670 A CN111855670 A CN 111855670A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
The invention discloses a municipal road crack detection device and a detection method, and particularly relates to the technical field of road maintenance. The device reduces the shake energy to supplement light to the detection position in the process of shooting and detecting the road crack, is provided with a large display screen, can watch the condition of the shooting position in the moving process, can wirelessly transmit detection information, and is provided with a large-capacity power supply.
Description
Technical Field
The invention relates to the technical field of road maintenance, in particular to a municipal road crack detection device and a detection method.
Background
The method is to maintain and maintain the road, maintain the road and the structures and facilities on the road, keep the service performance of the road as much as possible, recover the damaged part in time, ensure the driving safety, comfort and smoothness, save the transportation cost and time, adopt correct technical measures, improve the engineering quality, prolong the service life of the road, and the maintenance and repair are complex, hard and simple and tedious work which is easy to ignore.
Chinese patent discloses a municipal road crack detection device, (No. CN208805476U), the technology of the patent covers the road in all aspects, the detection range of the detection device is enlarged, the bottom plate of the detection device is provided with four high-definition cameras, the coverage of the high-definition cameras is enhanced, the definition of pictures is improved, the crack detection precision is higher, however, most crack detection devices in the market are used for manually shooting and detecting the road cracks, the operation is inconvenient, the detected information is inconvenient to watch, and the hand-operated hand shakes during moving, which can cause the information detection to be inaccurate, most of the crack detection devices have no illuminating lamp, the light can not be supplemented to the detection part, the crack detection device is not favorable for the definition of shooting, the crack detection device can not be used in dark environment, most of the crack detection devices can not be conveniently watched, the direction of the detection device is inconvenient to adjust, and the cameras deviate from the crack detection position, most of the detection information can not be transmitted wirelessly, and the information is inconvenient to derive. Therefore, the person skilled in the art provides a municipal road crack detection device and a detection method to solve the problems in the background art.
Disclosure of Invention
The invention aims to provide a municipal road crack detection device and a detection method, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a municipal road crack detection device comprises a movable trolley, wherein a power box is arranged at the rear end of the upper surface of the movable trolley, a battery is arranged in the power box, an adapter is welded at the rear end of the upper surface of the power box, a display screen is rotatably arranged on the inner side of the adapter, a detection mechanism is arranged at the front end of the upper surface of the movable trolley, the upper end of the detection mechanism is provided with a control box, the lower surface of the control box is welded with a fixed plate, the lower surface of the fixed plate is provided with an air cylinder, the lower surface of the air cylinder is welded with a mounting plate, the lower surface of the mounting plate is provided with a camera, the lower surface of mounting panel closes on the position department of camera and installs the light, the notch has been seted up to the upper surface front end of travelling car, the upper surface front end of travelling car closes on the position department of notch and has seted up the fixed orifices.
As a further scheme of the invention: the rear end of the lower surface of the moving trolley is welded with a supporting plate, the lower end of the outer surface of one side of the supporting plate is provided with a hub motor, the upper surface of the front end of the moving trolley is provided with a bearing, a rotating handle is installed inside the bearing, the lower end of the rotating handle is welded with a connecting steel pipe, and the lower surface of the connecting steel pipe is welded with a steering wheel.
As a still further scheme of the invention: the utility model discloses a wireless transmission device, including control box, pilot lamp, control box, video analysis encoder, mainboard, wireless transmission module, wireless.
As a still further scheme of the invention: the display screen is rotatably installed at the rear end of the upper surface of the power box through the adapter, the control box is installed at the position of the upper surface of the movable trolley through the fixing plate, the detection mechanism penetrates through the upper surface of the fixing plate through the screw, the lower end of the screw rotates at the inner position of the fixing hole, and the mounting plate and the air cylinder penetrate through the notch and are located at the position of the lower surface of the movable trolley.
As a still further scheme of the invention: six, six are no less than to the light evenly distributed is in the lower surface position department of mounting panel, the camera is provided with two, two the camera correspondence is installed in the lower surface front and back position department of mounting panel.
As a still further scheme of the invention: the rotating handle is rotatably arranged at the front end of the upper surface of the movable trolley through a bearing, and the lower end of the rotating handle is welded at the upper surface of the connecting steel pipe.
As a still further scheme of the invention: the supporting plates and the hub motors are arranged in two groups, the supporting plates and the hub motors are correspondingly arranged at the left side position and the right side position of the rear end of the lower surface of the moving trolley, the number of the steering wheels is two, and the steering wheels are welded at one end position of the lower surface of the connecting steel pipe.
As a still further scheme of the invention: the output electrode of battery connects the input of mainboard, the output electrode connection control button of mainboard, pilot lamp, wireless transmission module, camera, light, cylinder, display screen and video analysis encoder's input.
As a still further scheme of the invention: a municipal road crack detection device and a detection method thereof are disclosed, wherein the detection method comprises the following steps:
s1, firstly, place the upper surface of travelling car to detection mechanism through the fixed plate, and the fixed plate is located the top position department of notch, run through the upper surface of fixed plate through the screw, the lower extreme of screw rotates the inside of fixed orifices, fix the upper surface of travelling car to detection mechanism, charge to the battery of power supply box inside, press down control button, through the inside mainboard control in control box in-wheel motor operation, handheld commentaries on classics handle, the lower extreme of commentaries on classics handle passes through the bearing and rotates at the upper surface of travelling car, drive the directive wheel through connecting the steel pipe and rotate, the travelling car moves, move the crack stop motion when the travelling car moves, the crack department is aimed at to detection mechanism' S lower extreme.
S2, then, rotate the display screen of opening the power supply box upper surface through the adaptor, press the control button, mainboard control cylinder operation, push down the mounting panel, make the camera reach and shoot the height, the camera is opened, corresponding pilot lamp lights, if when light is darker, the light operation is to the illumination of shooting department, the shooting information of camera shows on the display screen through the processing back of mainboard, the inside of shooting video entering video analysis encoder, through video analysis encoder analysis processing video information, show the display screen on processing data real-time, and the inside of mainboard is sent to the information after handling, the mainboard exports information through wireless transmission module, carry out information printing and save.
S3 and finally, detecting that the rear cylinder drives the mounting plate to contract, rotating through the adapter to close the display screen, holding the rotating handle, rotating the lower end of the rotating handle through the bearing on the upper surface of the moving trolley, driving the steering wheel to rotate through the connecting steel pipe, moving the moving trolley, moving the device to the storage position, and charging the battery inside the power box.
Compared with the prior art, the invention has the beneficial effects that: the crack detection device is provided with the movable trolley, the camera is fixed through the trolley, the shake is reduced in the process of shooting and detecting road cracks, the accuracy of information detection is improved, the illuminating lamp is arranged, light can be supplemented to the detection position, the shooting definition is improved, the device can be used in a dark environment, the large display screen is arranged, the condition of the shooting position can be watched in the moving process, the phenomenon that the shooting range deviates from the cracks is avoided, the detection information can be transmitted wirelessly, the information is convenient to derive, the large-capacity power supply is arranged, the device can run for a long time, and the direction can be adjusted conveniently in the moving process through the rotating device of the rotating handle.
Drawings
FIG. 1 is a schematic structural view of a town road crack detection device;
FIG. 2 is a schematic structural view of a moving trolley in the municipal road crack detection device;
FIG. 3 is a perspective view of a power supply box in a town road crack detection device;
FIG. 4 is a schematic view of the detection mechanism in a town road crack detection device;
FIG. 5 is a perspective view of a control box in a town road crack detection device.
In the figure: 1. moving the trolley; 2. a power supply box; 3. a detection mechanism; 4. a display screen; 5. a support plate; 6. a hub motor; 7. connecting the steel pipes; 8. a steering wheel; 9. turning a handle; 10. a bearing; 11. a notch; 12. a fixing hole; 13. a battery; 14. an adapter; 15. a control box; 16. a fixing plate; 17. mounting a plate; 18. a cylinder; 19. a camera; 20. an illuminating lamp; 21. a control key; 22. an indicator light; 23. a main board; 24. a video analysis encoder; 25. and a wireless transmission module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, in the embodiment of the invention, a municipal road crack detection device comprises a movable trolley 1, a power supply box 2 is installed at the rear end of the upper surface of the movable trolley 1, a battery 13 is installed inside the power supply box 2, an adapter 14 is welded at the rear end of the upper surface of the power supply box 2, a display screen 4 is rotatably installed inside the adapter 14, a detection mechanism 3 is installed at the front end of the upper surface of the movable trolley 1, a control box 15 is arranged at the upper end of the detection mechanism 3, a fixing plate 16 is welded at the lower surface of the control box 15, an air cylinder 18 is installed at the lower surface of the fixing plate 16, an installation plate 17 is welded at the lower surface of the air cylinder 18, a camera 19 is installed at the lower surface of the installation plate 17, an illuminating lamp 20 is installed at a position, which is close to the camera 19, a notch 11 is formed at the front end of the upper surface of the movable, the display screen 4 is rotatably installed at the rear end of the upper surface of the power box 2 through the adapter 14, the control box 15 is installed at the upper surface of the mobile trolley 1 through the fixing plate 16, the detection mechanism 3 penetrates through the upper surface of the fixing plate 16 through screws, the lower ends of the screws rotate at the inner positions of the fixing holes 12, the mounting plate 17 and the air cylinder 18 penetrate through the notch 11 and are located at the lower surface of the mobile trolley 1, the number of the lighting lamps 20 is not less than six, the six lighting lamps 20 are uniformly distributed at the lower surface of the mounting plate 17, two cameras 19 are arranged, the two cameras 19 are correspondingly installed at the front end and the rear end of the lower surface of the mounting plate 17, firstly, the detection mechanism 3 is placed on the upper surface of the mobile trolley 1 through the fixing plate 16, the fixing plate 16 is located at the upper position of the notch 11, the screws penetrate through the upper surface of the fixing, fixing detection mechanism 3 to the upper surface of travelling car 1, charge to the inside battery 13 of power supply box 2, move travelling car 1 to crack department out of service, detection mechanism 3's lower extreme is aimed at crack department, then, rotate through adaptor 14 and open the display screen 4 of power supply box 2 upper surface, control camera 19 through detection mechanism 3 and open, if when light is darker, light 20 moves and throws light on to the shooting department, data and video display after detection mechanism 3 handles are to display screen 4 on, finally, rotate through adaptor 14 and close display screen 4, move the device to the storage department, it can to the processing of charging to the inside battery 13 of power supply box 2.
In fig. 1, 2: the rear end of the lower surface of the movable trolley 1 is welded with a support plate 5, the lower end of the outer surface of one side of the support plate 5 is provided with an in-wheel motor 6, the upper surface of the front end of the movable trolley 1 is provided with a bearing 10, a rotating handle 9 is arranged inside the bearing 10, the lower end of the rotating handle 9 is welded with a connecting steel pipe 7, the lower surface of the connecting steel pipe 7 is welded with steering wheels 8, the rotating handle 9 is rotatably arranged at the front end of the upper surface of the movable trolley 1 through the bearing 10, the lower end of the rotating handle 9 is welded at the upper surface of the connecting steel pipe 7, the support plates 5 and the in-wheel motor 6 are provided with two groups, the two groups of support plates 5 and the in-wheel motor 6 are correspondingly arranged at the left side and right side positions of the rear end of the lower surface of the movable trolley 1, the two steering wheels 8 are both welded at one end position, drive directive wheel 8 through connecting steel pipe 7 and rotate, remove travelling car 1, move crack department shutdown when travelling car 1 moves, crack department is aimed at to detection mechanism 3's lower extreme, use the completion back, handheld commentaries on classics 9, the lower extreme of commentaries on classics 9 passes through bearing 10 and rotates at the upper surface of travelling car 1, drive directive wheel 8 through connecting steel pipe 7 and rotate, remove travelling car 1, move the device to the department of accomodating, to the inside battery 13 charge of power supply box 2 handle can.
In fig. 1, 4, 5: an indicator lamp 22 is installed at the upper end of the front surface of the control box 15, a control key 21 is installed at the position, below the indicator lamp 22, of the upper end of the front surface of the control box 15, a video analysis encoder 24 is installed at the lower surface of the interior of the control box 15, a main board 23 is installed at the position, above the video analysis encoder 24, of the interior of the control box 15, a wireless transmission module 25 is installed at the position, above the main board 23, of the interior of the control box 15, an output end electrode of the battery 13 is connected with an input end of the main board 23, an output end electrode of the main board 23 is connected with the control key 21, the indicator lamp 22, the wireless transmission module 25, the camera 19, the illuminating lamp 20, the air cylinder 18, the display screen 4 and an input end of the video analysis encoder 24, the control key 21 is pressed, the main board 23 controls the air cylinder 18 to operate, the mounting plate 17 is pressed, if when light is darker, the illumination of shooting department is lighted in the operation of light 20, camera 19's shooting information is shown on display screen 4 through the processing of mainboard 23, the inside of shooting video entering video analysis encoder 24, through video analysis encoder 24 analysis processing video information, show display screen 4 to the data processed in real time, and the inside of mainboard 23 is sent to the information after handling, mainboard 23 exports information through wireless transmission module 25, carry out information printing save.
It should be noted that: the device comprises an air cylinder 18 (model is AXWF32-50-W5), a camera 19 (model is M2ST130M-H), an in-wheel motor 6 (model is FLD302), a video analysis encoder 24 (model is HVAE-0100), a main board 23 (model is OPS-H110-CR1) and a wireless transmission module 25 (model is DTD 110F).
A municipal road crack detection device and a detection method thereof are disclosed, wherein the detection method comprises the following steps:
firstly, the detection mechanism 3 is placed on the upper surface of the movable trolley 1 through the fixing plate 16, the fixing plate 16 is located above the notch 11, the fixing plate penetrates through the upper surface of the fixing plate 16 through a screw, the lower end of the screw rotates inside the fixing hole 12, the detection mechanism 3 is fixed on the upper surface of the movable trolley 1, a battery 13 inside the power box 2 is charged, a control key 21 is pressed, the operation of the hub motor 6 is controlled through a main board 23 inside the control box 15, the handle 9 is held by hand, the lower end of the handle 9 rotates on the upper surface of the movable trolley 1 through the bearing 10, the steering wheel 8 is driven to rotate through the connecting steel pipe 7, the movable trolley 1 is moved, when the movable trolley 1 is moved to a crack to stop operation, and the lower end of the detection mechanism 3 is aligned to the crack.
Then, the display screen 4 on the upper surface of the power box 2 is turned on through the adapter 14, the control key 21 is pressed, the main board 23 controls the cylinder 18 to operate, the mounting plate 17 is pressed down, the camera 19 reaches the shooting height, the camera 19 is turned on, the corresponding indicator lamp 22 is turned on, if the light is dark, the illuminating lamp 20 operates to illuminate the shooting position, the shooting information of the camera 19 is processed through the main board 23 and then displayed on the display screen 4, the shot video enters the video analysis encoder 24, the video information is analyzed and processed through the video analysis encoder 24, the processed data is displayed on the display screen 4 in real time, the processed information is sent to the inside of the main board 23, and the main board 23 leads the information out through the wireless transmission module 25 for information printing and storage.
Finally, the detection rear cylinder 18 drives the mounting plate 17 to contract, the display screen 4 is turned off through the rotation of the adapter 14, the rotating handle 9 is held by a hand, the lower end of the rotating handle 9 rotates on the upper surface of the movable trolley 1 through the bearing 10, the steering wheel 8 is driven to rotate through the connecting steel pipe 7, the movable trolley 1 is moved to the containing position, and the battery 13 inside the power box 2 is charged.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a town road crack detection device, includes travelling car (1), its characterized in that, power supply box (2) are installed to the upper surface rear end of travelling car (1), the internally mounted of power supply box (2) has battery (13), the welding of the upper surface rear end of power supply box (2) has adaptor (14), the inboard rotation of adaptor (14) installs display screen (4), detection mechanism (3) are installed to the upper surface front end of travelling car (1), the upper end of detection mechanism (3) is provided with control box (15), the lower surface welding of control box (15) has fixed plate (16), the lower surface mounting of fixed plate (16) has cylinder (18), the lower surface welding of cylinder (18) has mounting panel (17), the lower surface mounting of mounting panel (17) has camera (19), the lower surface of mounting panel (17) closes on position department of camera (19) and installs light (20), notch (11) have been seted up to the upper surface front end of travelling car (1), fixed orifices (12) have been seted up to the upper surface front end of travelling car (1) and the position department that closes on notch (11).
2. The municipal road crack detection device according to claim 1, characterized in that a support plate (5) is welded at the rear end of the lower surface of the moving trolley (1), a hub motor (6) is installed at the lower end of the outer surface of one side of the support plate (5), a bearing (10) is installed on the upper surface of the front end of the moving trolley (1), a rotating handle (9) is installed inside the bearing (10), a connecting steel pipe (7) is welded at the lower end of the rotating handle (9), and a steering wheel (8) is welded at the lower surface of the connecting steel pipe (7).
3. The town road crack detection device according to claim 1, wherein an indicator lamp (22) is installed at the upper end of the front surface of the control box (15), a control key (21) is installed at the position, below the indicator lamp (22), of the upper end of the front surface of the control box (15), a video analysis encoder (24) is installed at the lower surface of the inside of the control box (15), a main board (23) is installed at the position, above the video analysis encoder (24), of the inside of the control box (15), and a wireless transmission module (25) is installed at the position, above the main board (23), of the inside of the control box (15).
4. The town road crack detection device according to claim 1, wherein the display screen (4) is rotatably mounted at the rear end of the upper surface of the power supply box (2) through an adapter (14), the control box (15) is mounted at the upper surface of the mobile cart (1) through a fixing plate (16), the detection mechanism (3) penetrates through the upper surface of the fixing plate (16) through a screw, the lower end of the screw is rotated at the inner position of the fixing hole (12), and the mounting plate (17) and the cylinder (18) penetrating notch (11) are located at the lower surface of the mobile cart (1).
5. The municipal road crack detection device according to claim 1, wherein the number of the lighting lamps (20) is not less than six, the six lighting lamps (20) are uniformly distributed on the lower surface of the mounting plate (17), the number of the cameras (19) is two, and the two cameras (19) are correspondingly mounted on the front and rear positions of the lower surface of the mounting plate (17).
6. The municipal road crack detection device according to claim 2, wherein the rotating handle (9) is rotatably mounted on the front position of the upper surface of the mobile cart (1) through a bearing (10), and the lower end of the rotating handle (9) is welded to the upper surface of the connecting steel pipe (7).
7. The municipal road crack detection device according to claim 2, wherein two sets of the support plates (5) and the hub motors (6) are arranged, the two sets of the support plates (5) and the hub motors (6) are correspondingly arranged at the left and right positions of the rear end of the lower surface of the movable trolley (1), two steering wheels (8) are arranged, and the two steering wheels (8) are welded at one end of the lower surface of the connecting steel pipe (7).
8. The municipal road crack detection device according to claim 3, wherein the output electrode of the battery (13) is connected to the input end of a main board (23), and the output electrode of the main board (23) is connected to the input ends of a control key (21), an indicator lamp (22), a wireless transmission module (25), a camera (19), a lighting lamp (20), a cylinder (18), a display screen (4) and a video analysis encoder (24).
9. The municipal road crack detection device and method according to any one of claims 1 to 8, characterized in that the detection method comprises the following steps:
s1, firstly, placing a detection mechanism (3) on the upper surface of a mobile trolley (1) through a fixing plate (16), positioning the fixing plate (16) above a notch (11), penetrating the upper surface of the fixing plate (16) through a screw, rotating the lower end of the screw to the inside of a fixing hole (12), fixing the detection mechanism (3) on the upper surface of the mobile trolley (1), charging a battery (13) inside a power supply box (2), pressing a control key (21), controlling a hub motor (6) to operate through a main board (23) inside a control box (15), holding a rotating handle (9), rotating the lower end of the rotating handle (9) on the upper surface of the mobile trolley (1) through a bearing (10), driving a steering wheel (8) to rotate through a connecting steel pipe (7), moving the mobile trolley (1), and stopping when the mobile trolley (1) moves to a crack, the lower end of the detection mechanism (3) is aligned to the crack.
S2, then, the display screen (4) on the upper surface of the power box (2) is turned on through the adapter (14), the control key (21) is pressed, the main board (23) controls the cylinder (18) to operate, the mounting plate (17) is pressed down, the camera (19) reaches the shooting height, the camera (19) is turned on, the corresponding indicator lamp (22) is lightened, if the light is dark, the illuminating lamp (20) operates to illuminate the shooting position, the shooting information of the camera (19) is displayed on the display screen (4) after being processed by the main board (23), the shot video enters the inside of the video analysis encoder (24), the video information is analyzed and processed by the video analysis encoder (24), the processed data is displayed on the display screen (4) in real time, the processed information is sent to the inside of the main board (23), the information is led out through the wireless transmission module (25) by the main board (23), and printing and storing the information.
S3, finally, detect that back cylinder (18) drive mounting panel (17) shrink, rotate through adaptor (14) and close display screen (4), handheld commentaries on classics handle (9), the lower extreme of commentaries on classics handle (9) passes through bearing (10) and rotates at the upper surface of removal dolly (1), drive directive wheel (8) through connecting steel pipe (7) and rotate, remove removal dolly (1), remove the device and accomodate the department, it can to battery (13) charging process inside power supply box (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010715563.4A CN111855670A (en) | 2020-07-22 | 2020-07-22 | Municipal road crack detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010715563.4A CN111855670A (en) | 2020-07-22 | 2020-07-22 | Municipal road crack detection device and detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200012A (en) * | 2022-01-07 | 2022-03-18 | 贵州省交通规划勘察设计研究院股份有限公司 | Road engineering is with inside crack detection device of all-round highway |
| CN117738076A (en) * | 2024-02-07 | 2024-03-22 | 山东方正公路工程监理咨询有限公司 | Crack detection device for municipal road and bridge |
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| CN117738076B (en) * | 2024-02-07 | 2024-04-19 | 山东方正公路工程监理咨询有限公司 | Crack detection device for municipal road and bridge |
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