CN112224116A - Bridge detects machine - Google Patents

Bridge detects machine Download PDF

Info

Publication number
CN112224116A
CN112224116A CN202011255504.XA CN202011255504A CN112224116A CN 112224116 A CN112224116 A CN 112224116A CN 202011255504 A CN202011255504 A CN 202011255504A CN 112224116 A CN112224116 A CN 112224116A
Authority
CN
China
Prior art keywords
rod
bridge
lantern ring
fixedly connected
inspection machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011255504.XA
Other languages
Chinese (zh)
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cen Tuxiu
Original Assignee
Cen Tuxiu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cen Tuxiu filed Critical Cen Tuxiu
Priority to CN202011255504.XA priority Critical patent/CN112224116A/en
Publication of CN112224116A publication Critical patent/CN112224116A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60PVEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P3/00Vehicles adapted to transport, to carry or to comprise special loads or objects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/10Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
    • E01D19/106Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/95Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/181Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R2300/00Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
    • B60R2300/10Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of camera system used
    • B60R2300/105Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of camera system used using multiple cameras

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Signal Processing (AREA)
  • Public Health (AREA)
  • Transportation (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention belongs to the technical field of bridge detection, and particularly relates to a bridge detector which comprises an electric vehicle main body, wherein a cab and an observation room are arranged in the electric vehicle main body, an installation block is fixedly connected to the front side of the electric vehicle main body, detection rods are respectively installed on the left side and the right side of the installation block, each detection rod comprises a first fixing rod, a central rod and a second fixing rod, a lantern ring is movably sleeved on the outer wall of the central rod, a camera is fixedly installed on the lower side of the outer ring of the lantern ring, a screw rod is fixedly connected to one side opposite to each of the two first fixing rods, and screw holes are formed in the opposite sides; the electric motor car main part stops at the intermediate position on bridge road surface, when the length of measuring rod was not enough, adds two measuring rods again to with the screw rod of its relative one side respectively with two screw threaded connection installed, the measuring rod length after up to the concatenation keeps unanimous with bridge road surface width, and the electric motor car main part moves forward, can make a video recording and inspection each department of road surface through the camera.

Description

Bridge detects machine
Technical Field
The invention relates to the technical field of bridge detection, in particular to a bridge detection machine.
Background
In recent years, the construction of roads and bridges in China keeps a good state of continuous development, the number and the mileage of the roads and bridges are rapidly increased, bridge engineering is an important project for the coordinated development of the society and the economy, the bridges inevitably generate various structural damages in the long-term operation process, the bearing capacity and the durability of the bridge structure are gradually reduced, and the detection and the maintenance of the roads and the bridge equipment become urgent.
At present, the road surface quality of a bridge has great influence on the traffic trip of people, and the following problems are caused in the detection of the road surface quality of the bridge: 1. a great deal of labor and time are needed to check each corner of the road surface, and the service life is long; 2. the statistics on the number of the damaged bridge pavements is not perfect.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a bridge detection machine which has the characteristic of saving time and is convenient for counting the number of damaged bridge pavements.
In order to achieve the purpose, the invention provides the following technical scheme: a bridge detector comprises an electric vehicle main body, wherein a cab and an observation room are arranged in the electric vehicle main body from front to back, an installation block is fixedly connected to the front side of the electric vehicle main body, detection rods are respectively installed on the left side and the right side of the installation block, each detection rod comprises a first fixing rod, a central rod and a second fixing rod, one sides, opposite to the first fixing rods and the second fixing rods, of the central rods are respectively and fixedly connected with the two ends of the central rods, lantern rings are movably sleeved on the outer walls of the central rods, cameras are fixedly installed on the lower sides of outer rings of the lantern rings, screw rods are respectively and fixedly connected to the sides, opposite to the two first fixing rods, of the two second fixing rods, and screw holes matched with the screw rods;
the bottom of the inner wall of the observation chamber is detachably connected with a mounting plate through a bolt, the upper end face of the mounting plate is fixedly connected with a supporting column, the upper end of the supporting column is rotatably connected with a computer through a universal shaft, the rear end face of the computer is provided with a display screen and a switch, and the computer is in signal connection with a camera.
In order to conveniently adjust the orientation angle of the camera, the bridge detector is preferably provided with a knob above the lantern ring, the lower end surface of the knob is fixedly connected with a rotating shaft, the lower end of the rotating shaft penetrates through the lantern ring and extends into the lantern ring, and the lower end of the rotating shaft is fixedly connected with a pressing plate.
In order to fix the position of the camera, the bridge detection machine is preferably configured such that the pressing plate is made of elastic rubber, and the lower end surface of the pressing plate is provided with anti-slip threads.
In order to facilitate the installation of the detection rod on the outer side of the electric vehicle, the bridge detection machine is preferably provided with installation grooves on the left side and the right side of the installation block, and the opposite ends of the two screw rods are respectively in threaded connection with the two installation grooves.
In order to prevent the collar from sliding out of the end of the fixing rod, it is preferable that the diameter of each of the first fixing rod and the second fixing rod is larger than that of the central rod.
In order to improve the use comfort of the detection personnel, as an optimal choice of the bridge detection machine, a seat is fixedly arranged on the inner wall of the observation chamber, and the seat is positioned behind the computer.
In order to adjust the height of the computer according to the height of the detected person, the support is preferably of a telescopic rod structure;
in order to facilitate the rotation of the camera on the outer side of the central rod, it is preferable that the diameter of the outer ring of the lantern ring is larger than the diameters of the first fixing rod and the second fixing rod.
Compared with the prior art, the invention has the beneficial effects that:
1. this kind of bridge detects machine, stop the intermediate position on bridge road surface with electric motor car main part, then install two measuring sticks respectively in the left and right sides of installation piece, when the length of measuring stick is not enough, add two measuring sticks again, and with the screw rod of its relative one side respectively with two screw threaded connection installed, and then increase the whole length of measuring stick, measuring stick length after up to the concatenation keeps unanimous with bridge road surface width, the driver can move forward at the driver's cabin driving electric motor car main part, because every measuring stick middle part all installs the camera, consequently can make a video recording and inspection each department of road surface.
2. This kind of bridge detects machine, when the electric motor car main part slowly moved ahead, the live computer of uploading to the observation room in road surface that a plurality of cameras will shoot simultaneously, then observed the road surface situation by the staff in the observation room, the automatic image of saving shooting of computer when observing is for reinspection.
3. This kind of bridge detects machine, accomplish the back with a plurality of gauge sticks concatenation, rotate the lantern ring in the well core rod outside, and then adjust the position of camera, then the spiral is twisted and is moved the knob and can drive the pivot and move towards lantern ring inside, and then make the clamp plate of rubber system hug closely with well core rod outer wall to the position of fixed camera avoids the electric motor car to remove the in-process camera and rocks.
In summary, the following steps: a bridge detects machine has the characteristics of saving time, is convenient for simultaneously make statistics of bridge road surface damage quantity.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a structural diagram of a bridge inspection machine according to the present invention;
FIG. 2 is a right side view of a bridge inspection machine of the present invention;
FIG. 3 is a view of the construction of the test stick of the present invention;
FIG. 4 is a mounting block diagram of the present invention;
FIG. 5 is a cross-sectional view of the collar and camera head of the present invention;
FIG. 6 is a diagram of a computer structure according to the present invention.
In the drawings, 1, an electric vehicle main body; 101. a cab; 102. an observation room; 103. a seat; 2. mounting blocks; 201. mounting grooves; 3. a detection lever; 4. a first fixing lever; 401. a screw; 5. a center pole; 6. a second fixing bar; 601. a screw hole; 7. a camera; 701. a collar; 702. a knob; 703. a rotating shaft; 704. pressing a plate; 8. a computer; 801. a display screen; 802. a switch; 9. a pillar; 901. and (7) mounting the plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1-6, the present invention provides the following technical solutions: a bridge detector comprises an electric vehicle main body 1, a cab 101 and an observation chamber 102 are arranged in the electric vehicle main body 1 from front to back, an installation block 2 is fixedly connected to the front side of the electric vehicle main body 1, detection rods 3 are respectively arranged on the left side and the right side of the installation block 2, each detection rod 3 comprises a first fixing rod 4, well core rod 5 and second dead lever 6, one side that first dead lever 4 and second dead lever 6 are relative respectively with well core rod 5's both ends fixed connection, the lantern ring 701 has been cup jointed in well core rod 5's outer wall activity, the downside fixed mounting of lantern ring 701 outer lane has camera 7, the equal fixedly connected with screw rod 401 in two one sides that first dead lever 4 is relative, two second dead levers 6 one side mutually on the back of the body all seted up with screw rod 401 assorted screw 601, mounting groove 201 has all been seted up to the left and right sides of installation piece 2, two one ends that screw rod 401 is relative respectively with two mounting groove 201 threaded connection.
In this embodiment: stop electric motor car main part 1 at the intermediate position on bridge road surface, then install two measuring poles 3 respectively in the left and right sides of installation piece 2, when measuring pole 3's length is not enough, add two measuring poles 3 again, and with the screw rod 401 of its relative one side respectively with two screw 601 threaded connection installed, and then increase measuring pole 3's overall length, measuring pole 3 length and bridge road surface width after the concatenation keep unanimous, the driver can drive electric motor car main part 1 and move forward in driver's cabin 101, because camera 7 is all installed at every measuring pole 3 middle part, consequently can make a video recording and inspection each department of road surface.
As a technical optimization scheme of the invention, the bottom end of the inner wall of the observation chamber 102 is detachably connected with a mounting plate 901 through a bolt, the upper end surface of the mounting plate 901 is fixedly connected with a support column 9, the upper end of the support column 9 is rotatably connected with a computer 8 through a universal shaft, the rear end surface of the computer 8 is provided with a display screen 801 and a switch 802, and the computer 8 is in signal connection with a camera 7.
In this embodiment: when the electric vehicle main body 1 slowly moves forward, the plurality of cameras 7 simultaneously upload the shot road surface real conditions to the computer of the observation room 102, then the staff in the observation room observes the road surface conditions, and the computer automatically stores the shot images for rechecking during observation.
As a technical optimization scheme of the invention, a knob 702 is arranged above a lantern ring 701, a rotating shaft 703 is fixedly connected to the lower end face of the knob 702, the lower end of the rotating shaft 703 penetrates through the lantern ring 701 and extends into the lantern ring 701, a pressing plate 704 is fixedly connected to the lower end of the rotating shaft 703, the pressing plate 704 is made of elastic rubber, and anti-skid grains are arranged on the lower end face of the pressing plate 704.
In this embodiment: after accomplishing the concatenation of a plurality of detection poles 3, rotate the lantern ring 701 in the 5 outsides of well core rod, and then adjust the position of camera 7, then the knob 702 is twisted to the spiral and to be moved can drive pivot 703 towards lantern ring 701 inside removal, and then make the clamp plate 704 of rubber system hug closely with well core rod 5 outer wall, thereby the position of fixed camera 7, avoid electric motor car to remove in-process camera 7 and rock, can increase the frictional force between clamp plate 704 and well core rod 5 through setting up anti-skidding line, can further fix the position of camera 7.
As a technical optimization scheme of the present invention, the diameters of the first fixing rod 4 and the second fixing rod 6 are both larger than the diameter of the central rod 5, and the outer ring diameter of the collar 701 is larger than the diameters of the first fixing rod 4 and the second fixing rod 6.
In this embodiment: the diameter through setting up well core 5 is less, and then at the in-process of rotating lantern ring 701, and the lantern ring 701 is blockked by the first dead lever 4 and the second dead lever 6 of both sides to avoid appearing the phenomenon that the lantern ring 701 slips from the dead lever end.
As a technical optimization scheme of the invention, a seat 103 is fixedly arranged on the inner wall of the observation chamber 102, the seat 103 is positioned at the rear of the computer 8, and the support 9 is of a telescopic rod structure.
In this embodiment: the staff in the observation room 102 can sit on the seat 103 to check the computer, and due to the telescopic rod structure of the support 9, the height of the computer can be automatically adjusted according to the height of the staff, so that the comfort level of the staff is further improved.
The working principle and the using process of the invention are as follows: the electric vehicle main body 1 is stopped at the middle position of a bridge road surface, then the two detection rods 3 are respectively installed at the left side and the right side of the installation block 2, when the length of the detection rods 3 is not enough, the two detection rods 3 are added, the screw rods 401 at the opposite sides of the detection rods are respectively in threaded connection with the two installed screw holes 601, the whole length of the detection rods 3 is further increased, the length of the detection rods 3 after splicing is consistent with the width of the bridge road surface, a driver can drive the electric vehicle main body 1 to move forwards in the cab 101, the shot road surface is uploaded to a computer of the observation chamber 102 by the cameras 7 simultaneously, and then the road surface condition is observed by workers in the observation chamber.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a bridge detects machine, includes electric motor car main part (1), its characterized in that: the electric vehicle main body (1) is internally provided with a cab (101) and an observation chamber (102) from front to back, the front side of the electric vehicle main body (1) is fixedly connected with an installation block (2), the left side and the right side of the installation block (2) are both provided with a detection rod (3), the detection rod (3) comprises a first fixed rod (4), a central rod (5) and a second fixed rod (6), one side of the first fixed rod (4) opposite to one side of the second fixed rod (6) is respectively and fixedly connected with the two ends of the central rod (5), a lantern ring (701) is movably sleeved on the outer wall of the central rod (5), a camera (7) is fixedly mounted on the lower side of the outer ring of the lantern ring (701), a screw rod (401) is fixedly connected to one side of each of the two first fixing rods (4) opposite to each other, and a screw hole (601) matched with the screw rod (401) is formed in one side of each of the two second fixing rods (6) opposite to each other;
the bottom of observation room (102) inner wall can be dismantled through the bolt and be connected with mounting panel (901), the up end fixedly connected with pillar (9) of mounting panel (901), the upper end of pillar (9) is rotated through the cardan shaft and is connected with computer (8), display screen (801) and switch (802) are installed to the rear end face of computer (8), computer (8) and camera (7) signal connection.
2. The bridge inspection machine of claim 1, wherein: a knob (702) is arranged above the lantern ring (701), a rotating shaft (703) is fixedly connected to the lower end face of the knob (702), the lower end of the rotating shaft (703) penetrates through the lantern ring (701) and extends into the lantern ring (701), and a pressing plate (704) is fixedly connected to the lower end of the rotating shaft (703).
3. The bridge inspection machine of claim 2, wherein: the pressing plate (704) is made of elastic rubber, and anti-skid grains are arranged on the lower end face of the pressing plate (704).
4. The bridge inspection machine of claim 1, wherein: mounting groove (201) have all been seted up to the left and right sides of installation piece (2), two the one end that screw rod (401) is relative respectively with two mounting groove (201) threaded connection.
5. The bridge inspection machine of claim 1, wherein: the diameters of the first fixing rod (4) and the second fixing rod (6) are larger than that of the central rod (5).
6. The bridge inspection machine of claim 1, wherein: a seat (103) is fixedly mounted on the inner wall of the observation chamber (102), and the seat (103) is located behind the computer (8).
7. The bridge inspection machine of claim 1, wherein: the support (9) is of a telescopic rod structure.
8. The bridge inspection machine of claim 1, wherein: the diameter of the outer ring of the lantern ring (701) is larger than the diameters of the first fixing rod (4) and the second fixing rod (6).
CN202011255504.XA 2020-11-11 2020-11-11 Bridge detects machine Pending CN112224116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011255504.XA CN112224116A (en) 2020-11-11 2020-11-11 Bridge detects machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011255504.XA CN112224116A (en) 2020-11-11 2020-11-11 Bridge detects machine

Publications (1)

Publication Number Publication Date
CN112224116A true CN112224116A (en) 2021-01-15

Family

ID=74123404

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011255504.XA Pending CN112224116A (en) 2020-11-11 2020-11-11 Bridge detects machine

Country Status (1)

Country Link
CN (1) CN112224116A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032725A1 (en) * 1997-12-22 1999-07-01 The Roads And Traffic Authority Of New South Wales Road pavement deterioration inspection system
CN103266552A (en) * 2013-05-09 2013-08-28 江苏科技大学 Depth image based pavement detection system
CN104313986A (en) * 2014-09-11 2015-01-28 交通运输部公路科学研究所 Pavement roughness detection system and method
CN104878680A (en) * 2015-06-23 2015-09-02 江苏中路工程技术研究院有限公司 Road surface detection device
CN210341576U (en) * 2019-05-30 2020-04-17 广州冠粤路桥检测有限公司 On-spot testing arrangement of road surface engineering
CN210567328U (en) * 2019-07-08 2020-05-19 福瑞森图像技术(上海)有限公司 Monitoring device for flexible plate production line

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032725A1 (en) * 1997-12-22 1999-07-01 The Roads And Traffic Authority Of New South Wales Road pavement deterioration inspection system
CN103266552A (en) * 2013-05-09 2013-08-28 江苏科技大学 Depth image based pavement detection system
CN104313986A (en) * 2014-09-11 2015-01-28 交通运输部公路科学研究所 Pavement roughness detection system and method
CN104878680A (en) * 2015-06-23 2015-09-02 江苏中路工程技术研究院有限公司 Road surface detection device
CN210341576U (en) * 2019-05-30 2020-04-17 广州冠粤路桥检测有限公司 On-spot testing arrangement of road surface engineering
CN210567328U (en) * 2019-07-08 2020-05-19 福瑞森图像技术(上海)有限公司 Monitoring device for flexible plate production line

Similar Documents

Publication Publication Date Title
CN111811870B (en) Construction detection soil sampling system in engineering supervision
CN218097567U (en) Road flatness detection device for highway engineering construction
CN116298172A (en) Bridge steel construction fillet weld detection device
CN116479952A (en) Bridge foundation settlement deformation monitoring device and monitoring method
CN112224116A (en) Bridge detects machine
CN117513116A (en) Bituminous paving flatness detection device and application method thereof
CN219624751U (en) Bridge bottom level detector convenient to observe
CN112505066A (en) Tunnel acceptance device
CN116214545A (en) Landslide potential safety hazard investigation robot
CN114674662B (en) Early cracking resistance test device for concrete and application method thereof
CN217359742U (en) Tunnel lining cavity detection device
CN216410907U (en) Device for rapidly detecting compaction degree of road filling foundation
CN112065274B (en) Engineering supervision auxiliary device
CN213516912U (en) Pavement damage detection device based on Beidou positioning and FPGA
CN210225604U (en) Hand-held type highway bridge and culvert detection video acquisition device
CN211478153U (en) Tunnel lining quality safety inspection device
CN209856663U (en) Road and bridge construction monitoring installation device convenient to adjust
CN219992189U (en) Highway bridge detects machine with mark function
CN221725261U (en) Urban and rural planning monitoring management device
CN206486785U (en) Deck crack detection means based on acquisition technology
CN220231381U (en) Road roller earth and stone side filler particle size detecting system
CN221038338U (en) Roadbed structure strength measuring device
CN216517268U (en) Quick splicing device for construction based on superproject control
CN219157351U (en) Pavement rut detection ruler
CN219348571U (en) Highway road surface permeability detects instrument

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210115

RJ01 Rejection of invention patent application after publication