CN111551118A

CN111551118A - Bridge crack measuring device and method for municipal bridge engineering

Info

Publication number: CN111551118A
Application number: CN202010383624.1A
Authority: CN
Inventors: 欧高翔; 钟宏; 杨光辉
Original assignee: Sichuan Xianzhou Construction Engineering Co ltd
Current assignee: Sichuan Xianzhou Construction Engineering Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-08-18
Anticipated expiration: 2040-05-08
Also published as: CN111551118B

Abstract

The invention relates to a bridge crack measuring device for municipal bridge engineering, which comprises a horizontal cableway erected between adjacent piers and a trolley sliding on the cableway, wherein a rotating seat is horizontally and rotatably arranged on the top wall of the trolley, two cameras are arranged on the top wall of the rotating seat in parallel, and a linkage device for driving the two cameras to synchronously move away from and approach to each other is arranged on the rotating seat. The method comprises the steps that an operator drives the rotating seat to rotate, when the arrangement direction of the two cameras is approximately the same as the extension direction of the crack, the two cameras are driven to be away synchronously, a complete crack picture can be obtained on a remote computer, and the maximum length of the crack on the collected picture is combined with the actual proportion of the picture by the operator to be calculated, so that the actual length of the crack can be obtained.

Description

Bridge crack measuring device and method for municipal bridge engineering

Technical Field

The invention relates to the technical field of bridge construction engineering, in particular to a bridge crack measuring device and a bridge crack measuring method for municipal bridge engineering.

Background

The reinforced concrete bridge structure bears the load of a vehicle for a long time, the over-frequency and overload phenomena become more prominent along with the development of social economy, the fatigue damage of the beam structure is accumulated continuously, and concrete cracks are easy to appear on the bottom surface or the side surface of the bridge structure along with the degradation of materials and structural performance. Once concrete cracks occur, a corrosion channel is opened, corrosion media are invaded, then the reinforcing steel bars are subjected to corrosion fatigue and even breakage, the concrete cracks are continuously expanded under the coupling action of the environment and the load, and finally the structure is subjected to fatigue failure; and because of the sudden nature and the difficult predictability of fatigue failure, the crack of reinforced concrete bridge structures threatens the safety of the structures greatly. Therefore, the real-time monitoring and sensing of the cracking of the concrete cracks, the timely repairing of the cracks and the structural reinforcement are significant for guaranteeing the safety and the service life of the reinforced concrete beam. The key point is how to accurately and effectively know the specific cracking condition of the reinforced concrete beam.

Chinese patent application publication No. CN104568972A discloses a concrete bridge bottom crack detection device, which includes two parallel guide rail brackets, a guide rail, two camera devices, a wireless transmission device and a monitoring device; the two guide rail brackets are arranged between two adjacent piers and are transversely parallel to the bottom surface of the bridge; the guide rail is vertically arranged between the two guide rail brackets and can move along the guide rail brackets; the two camera devices are arranged on the guide rail and can move along the guide rail; first travel switches are respectively arranged between the two camera devices and the two guide rail brackets, and a second travel switch is arranged between the two camera devices; the camera equipment is provided with a rotatable support, the support is provided with a camera capable of swinging up and down and is used for shooting the bottom surface of the bridge, and images shot by the camera are wirelessly transmitted to the monitoring equipment through the wireless transmission equipment.

The above prior art solutions have the following drawbacks: because the crack shape on the bridge is different, the length direction of some cracks can form certain contained angle with the length direction of bridge, and current detection device can only be along bridge width direction crack lateral expansion to and along bridge length direction horizontal migration, make the crack image of shooing appear whole length and width great, and shoot incomplete condition.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a bridge crack measuring device for municipal bridge engineering, which has the effect of conveniently shooting cracks with different shapes.

The above object of the present invention is achieved by the following technical solutions:

a bridge crack measuring device for municipal bridge engineering comprises a horizontal cableway erected between adjacent piers along the length direction of a bridge and a trolley arranged on the cableway in a sliding manner, the trolley is provided with a driving device for driving the trolley to slide on the track, the top wall of the trolley is horizontally and rotatably provided with a rotating seat, the trolley is provided with a rotating device for driving the rotating seat to rotate, the top wall of the rotating seat is provided with two cameras facing the bottom wall of the bridge in parallel, the rotating seat is provided with a linkage device for driving the two cameras to synchronously move away from and close to each other along the radial direction of the rotating seat, the trolley is provided with a Bluetooth communication module which is in wireless communication with a user operating system, the trolley is provided with a processing center, the processing center is electrically connected with the camera and used for opening and closing the driving device and the linkage device and receiving data collected by the camera.

By adopting the technical scheme, an operator can transmit a signal to the linkage device through the processing center from the positions such as the top surface of the bridge and the like through remote Bluetooth communication and is in signal connection with the Bluetooth communication module on the trolley through the remote Bluetooth communication, then the linkage device is driven to synchronously retract the two cameras to proper positions, then the trolley is driven to move on the cableway through the driving device, when the camera acquires a crack of which the end part length extends out of the image acquisition range of the camera, the rotating device is started according to the crack gradient, the rotating seat is rotated, when the arrangement direction of the two cameras is approximately the same as the crack extension direction, the linkage device is started to drive the two cameras to synchronously move away, a complete crack picture can be acquired on the remote computer, and then the maximum length of the crack on the acquired picture is combined with the actual proportion of the picture by the operator for calculation, the actual length of the crack can be obtained, the number of collected pictures can be greatly reduced, the crack picture collection efficiency is accelerated, and the shooting is convenient.

The present invention in a preferred example may be further configured to: the driving device comprises a first motor, two friction rollers and two first gears, the first motor is fixedly arranged on the trolley, the two friction rollers are arranged on the trolley in a parallel rotating mode, the cableway penetrates through the two friction rollers, the side walls of the friction rollers are in rolling contact with the cableway, the two first gears are respectively and coaxially fixedly connected to the end faces of the two friction rollers on the same side, the two first gears are meshed with each other, and the output shaft of the first motor is coaxially and fixedly connected with any one first gear.

Through adopting above-mentioned technical scheme, after operating personnel rotated through the first motor of remote computer control, first motor drove a friction roller and rotates, through two first gears on two friction rollers, made two friction roller reverse rotations, and the effect of frictional force between rethread friction roller and the cableway drives the dolly and removes convenient operation on the cableway.

The present invention in a preferred example may be further configured to: the rotating device comprises a second motor, a second gear and a gear ring, the gear ring is coaxially and fixedly arranged on the bottom wall of the rotating seat, the second motor is fixedly arranged on the trolley, the second gear is coaxially and fixedly connected with an output shaft of the second motor, and the second gear is meshed with the gear ring.

Through adopting above-mentioned technical scheme, crack seam appears in camera shooting range, and when the crack length of spreading obviously deviated two cameras and arrange the direction, orders about the second motor and rotates, by second gear on the second motor with rotate the seat and go up ring gear mechanical transmission to it is rotatory to drive to rotate the seat, rotates two cameras to unanimous with crack length direction, conveniently gathers complete crack image.

The present invention in a preferred example may be further configured to: the linkage device comprises a third motor, two turntables, two toothed rings, a guide sleeve and a plurality of extension blocks, wherein the two turntables are rotationally arranged on the top wall of the rotating seat in a mirror image manner, the two toothed rings are respectively coaxially and fixedly sleeved on the outer walls of the two turntables in a fixed manner, the two toothed rings are meshed with each other, the plurality of extension blocks are sequentially hinged end to end, the hinged shafts at the two ends of the extension block are parallel to the rotating shaft of the turntable, one end part of the extension block is hinged with the turntable, the other end part of the extension block is fixedly connected with the camera, a plurality of extension blocks are wound on the turntable, the guide sleeve is fixedly arranged on one side of the rotary table along the radial direction of the rotary seat, the extension block penetrates through the guide sleeve, the guide sleeve is internally provided with a linkage mechanism which is used for fixing the extension blocks extending out of the guide sleeve mutually and enabling the extension blocks to move mutually when the extension blocks are taken in the reel.

Through adopting above-mentioned technical scheme, when operating personnel need order about two cameras and keep away from each other, start the third motor, order about arbitrary carousel and rotate, and mesh mutually through two rings, it is rotatory to drive another carousel, push into the guide cylinder with extension piece on the carousel, again by link gear, the extension piece that makes to stretch out from the guide cylinder is connected fixedly each other, keep the straight line, thereby push out the camera to the straight line in a distance, can significantly reduce when the camera state of withdrawing, install holistic size, and convenient for accomodate.

The present invention in a preferred example may be further configured to: link gear includes flexure strip, grafting piece and wedge, the flexure strip sets firmly the one end that is close to with the carousel pin joint at the extension piece, the grafting piece sets firmly on the flexure strip, it inserts the slot to offer on the outer wall of extension piece perpendicular to self articulated shaft to supply the grafting piece, the flexure strip is used for ordering about the grafting piece and deviates from the slot, the wedge sets firmly in guide sleeve, the closed angle of wedge is kept away from the one end of carousel towards guide sleeve, the diapire ability of wedge can contact with the roof of flexure strip, the closed angle of wedge towards guide sleeve can contact with the diapire of flexure strip.

Through adopting above-mentioned technical scheme, when the extension piece stretches out from the guide cylinder, the flexure strip on the extension piece is under the extrusion of wedge, insert the plug-in block in the slot on the extension piece, thereby limit each other between the extension piece and rotate, when the extension piece is withdrawed to the carousel from the guide cylinder, the diapire contact of the closed angle flexure strip of flexure strip and wedge, and drive the flexure strip and keep away from the extension piece with the plug-in block, make to connect between the extension piece and break away from, make things convenient for carousel rolling extension piece.

The present invention in a preferred example may be further configured to: and a magnetic sheet capable of being attracted with the bottom wall of the slot is fixedly arranged on the wall surface of the insertion block, which is far away from the elastic sheet.

Through adopting above-mentioned technical scheme, when the grafting piece inserts the slot on the extension piece in, the magnetic sheet on the grafting piece adsorbs with the diapire looks of slot to effectively avoid the grafting piece to deviate from the slot, improve the installation stability between the extension piece.

The present invention in a preferred example may be further configured to: the last compressing roller that is used for compressing tightly the extension piece on the carousel that is provided with of roating seat, compressing roller is articulated with the roating seat, the cover is equipped with the torsional spring that is used for ordering about compressing roller rotation butt extension piece on the articulated shaft of compressing roller, the one end and the roating seat fixed connection, the other end and compressing roller fixed connection of torsional spring.

Through adopting above-mentioned technical scheme, when carousel rolling extension piece, the pinch roller rotates and supports tightly on the extension piece outer wall that has received on the carousel under the torsional spring effect to extension piece is accomodate neatly on making the carousel, and can stably extrude convenient to use from guide sleeve.

The present invention in a preferred example may be further configured to: the utility model discloses a take-up reel, including camera, connecting wire, winding dish, connecting wire and processing center, be equipped with the wiring mouth on the camera, rotate on the roof of seat and be provided with the winding dish that is used for accomodating the connecting wire, be equipped with the wiring mouth in the winding dish, the one end of wiring mouth is located the lateral wall of winding dish, the other end is located the terminal surface of winding dish and is connected with the processing center electricity, the connecting wire is around establishing on the winding dish, the connecting wire is kept away from the one end of camera and is coiled the connector fixed connection on the lateral wall with the winding, it is provided.

Through adopting above-mentioned technical scheme, when the camera stretches out, the camera stimulates the connecting wire to drive the rolling dish and rotate and to the connecting wire unwrapping wire, withdraw the back at the camera, the rolling dish rotates and coils the connecting wire on the perisporium under the elastic component elastic action, and the holding device is whole clean and tidy, and the connecting wire is arranged in order.

The present invention in a preferred example may be further configured to: the elastic piece is a coil spring, one end of the coil spring is fixedly connected with the rotating seat, and the other end of the coil spring is fixedly connected with the winding disc.

Through adopting above-mentioned technical scheme, when the camera stretches out, drive the rolling dish and overcome the spring force rotation of wind spring to keep the connecting wire that camera and processing center are connected straight, withdraw the back at the camera, the wind spring drives the rolling dish and rotates under self elasticity effect, and the rolling connecting wire, in order to keep the connecting wire to accomodate neatly arrange in order.

Aiming at the defects in the prior art, the invention aims to provide a bridge crack measuring method for municipal bridge engineering.

a bridge crack measuring method for municipal bridge engineering comprises the bridge crack measuring device for the municipal bridge engineering, and comprises the following steps:

s1, installing a cableway fixing frame on the side wall, opposite to each other, of the adjacent bridge piers below the bridge, drawing a steel cable, enabling two ends of the steel cable to be firmly installed on the fixing frame between the adjacent bridge piers, and tensioning the steel cable;

s2, arranging the trolley sliding frame on the cableway, enabling the lens of the camera to face the bottom wall of the bridge, and rotating the rotating seat until the two cameras are arranged along the width direction of the bridge;

s3, the trolley is connected with a Bluetooth communication module on the trolley through Bluetooth communication of a remote computer to drive the trolley to advance along a cableway, and after a camera collects a picture of the bottom of the bridge, the picture is collected by a processing center and sent to the remote computer;

s4, after the bridge cracks are collected by the cameras, rotating the rotating seat to enable the two ends of the cracks extending out of the image collecting range of the cameras to be located on the outer side edge of the cameras in the sliding direction, driving the two cameras to be away synchronously, and collecting images at the tail ends of the cracks;

and S5, processing the pictures around the crack on a remote computer, cutting a long strip photo containing the crack, and calculating the length of the crack according to the proportion of the photo.

Through adopting above-mentioned technical scheme, rotate two cameras into the state parallel with crack length direction, carry out the crack again and shoot, operating personnel can shoot the crack along its length direction, save whole picture shot volume to improve shooting efficiency.

In summary, the invention includes at least one of the following beneficial technical effects:

1. an operator drives the rotating seat to rotate, so that when the arrangement direction of the two cameras is approximately the same as the extension direction of the crack, the two cameras are driven to be away synchronously, a complete crack picture can be obtained on a remote computer, and then the maximum length of the crack on the collected picture is calculated by combining the actual proportion of the picture with the maximum length of the crack on the collected picture by the operator, so that the actual length of the crack can be obtained, the collection quantity of the pictures can be greatly reduced, the collection efficiency of the crack picture is accelerated, and the shooting is convenient;

2. when an operator needs to drive the two cameras to be away from each other, any one of the turntables is driven to rotate, the other turntable is driven to rotate through gear transmission, the extension blocks on the turntables are pushed into the guide cylinder, and the extension blocks extending outwards from the guide cylinder are connected and fixed with each other through the linkage mechanism to keep a straight line, so that the cameras are pushed out to be far straight lines, the size of the whole device can be greatly reduced when the cameras are in a retraction state, and the device is convenient to store;

3. when carousel rolling extension piece, the pinch roller rotates and supports tightly on the extension piece outer wall that has received on the carousel under the torsional spring effect to extension piece is accomodate neatly on making the carousel, and can stably extrude convenient to use from guide sleeve.

Drawings

Fig. 1 is a schematic view of the overall mounting structure of the present invention.

Fig. 2 is a schematic view of the mounting structure of the cart of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a partial sectional structural view of the rotary base of the present invention.

Fig. 5 is a partially enlarged schematic view of a portion B in fig. 4.

In the figure, 1, a cableway; 2. a trolley; 21. a drive device; 211. a first motor; 212. a rubbing roller; 213. a first gear; 3. a rotating seat; 31. a rotating device; 311. a second motor; 312. a second gear; 313. a ring gear; 4. a camera; 5. a linkage device; 51. a third motor; 52. a turntable; 53. a toothed ring; 54. a guide sleeve; 55. a lengthening block; 56. a linkage mechanism; 561. an elastic sheet; 562. an insertion block; 563. a wedge block; 564. a slot; 565. a magnetic sheet; 6. a Bluetooth communication module; 61. a processing center; 7. a pressure roller; 71. a torsion spring; 8. a connecting wire; 81. a winding disc; 82. a wiring port; 83. a coil spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the invention discloses a bridge crack measuring device for municipal bridge engineering, which comprises a cableway 1 and a trolley 2. The cableway 1 is arranged along the length direction of the bridge and is positioned between adjacent piers below the bridge. The wall surfaces opposite to the adjacent piers are respectively fixedly provided with a fixing frame through bolts, the cableway 1 is a steel cable and is erected between the two fixing frames, two ends of the cableway are respectively fixedly arranged with the steel cable, and a tensioning wheel is used for tensioning the steel cable. The cableways 1 are horizontally arranged in parallel at intervals in two groups along the width direction of the bridge and are symmetrically arranged on the center line of the bridge.

Referring to fig. 2, the bottom of the trolley 2 is provided with a mounting groove along the length direction thereof, and the cableway 1 is placed in the mounting groove. The trolley 2 is provided with a driving device 21 for driving the trolley 2 to move on the cableway 1, and the driving device comprises a first motor 211, two friction rollers 212 and two first gears 213. The first motor 211 is fixedly mounted on the trolley 2 through bolts and is a servo motor, and an output shaft of the servo motor is vertical. Two friction rollers 212 set up in the one end of dolly 2's mounting groove, and the axis of two friction rollers 212 is vertical, and both ends are all rotated and are installed on first dolly 2, the coaxial fixed connection of one end of the output shaft of first motor 211 and arbitrary friction roller 212. Two friction rollers 212 hold the runway 1 inside, with their outer walls in frictional contact with the outer walls of the runway 1. The two first gears 213 are respectively and fixedly installed coaxially with the two friction rollers 212, the two gears are both located on the same side of the two friction rollers 212, and the two gears are meshed with each other. The two friction rollers 212 synchronously rotate reversely, and the trolley 2 is driven to move on the cableway 1 under the action of friction force between the trolley and the cableway 1.

Referring to fig. 4, the top wall of the cart 2 is horizontally and rotatably mounted with a rotating base 3, and the cart 2 is provided with a rotating device 31 for driving the rotating base 3 to rotate, which includes a second motor 311, a second gear 312 and a gear ring 313. The bottom wall of the rotating seat 3 is provided with a mounting groove coaxial with the rotating seat, and the gear ring 313 is an inner gear ring 313 and is coaxially embedded in the mounting groove in an interference manner. The second motor 311 is fixedly arranged in the trolley 2, the axis of the second motor is vertical, the second gear 312 is coaxially and fixedly connected to the output shaft of the second motor 311, and the second gear 312 is meshed with the gear ring 313. The second motor 311 is a servo motor and can rotate the rotary shaft back and forth.

Two cameras are further arranged above the rotating base 3, and a linkage mechanism 56 for driving the two cameras to be synchronously far away from and close to each other along the radial direction of the rotating shaft is arranged on the rotating base 3 and comprises a third motor 51, two rotating discs 52, two toothed rings 53, a guide sleeve 54 and a plurality of extension blocks 55. Two motors are all installed on the roof of rotating seat 3 in the rotation, and the axis is parallel with the axis of rotating seat 3 to arrange with the axis mirror image of rotation axis. The toothed rings 53 are coaxially sleeved on the outer wall of the rotating discs 52, and the toothed rings 53 on the two rotating discs 52 are meshed with each other.

Referring to fig. 4 and 5, the extension block 55 is a rectangular parallelepiped component, the end of the extension block 55 is hinged in sequence to form a chain, the hinge shafts at the two ends of the extension block 55, the hinge shafts between the extension block 55 and the turntable 52, and the central axis of the turntable 52 are parallel to each other, one end of the chain formed by the extension block 55 is hinged to the side wall of the turntable 52, and the other end of the chain is fixedly connected to the side wall of the camera 4. A guide sleeve 54 is fixed on the top wall of the rotating seat 3, the guide sleeve 54 is positioned on one side of the rotating disc 52 far away from the other rotating disc 52, the axis of the guide sleeve 54 is perpendicular to the axis of the rotating disc 52, and the guide sleeves 54 on the two sides of the two rotating discs 52 are coaxially arranged. The extension block 55 passes through the guide sleeve 54, and a linkage mechanism 56 is arranged in the guide sleeve 54, wherein the extension block 55 extends out from the guide sleeve 54 to one end far away from the rotating disc 52 to connect and fix the extension blocks 55, and when the extension block 55 passes through the guide sleeve 54 and retracts onto the rotating disc 52, the extension blocks 55 are hinged.

The linkage 56 includes a resilient tab 561, a plug block 562, and a wedge block 563. The elastic sheet 561 is made of a steel sheet, the cross section of the insertion block 562 is square, the insertion block 562 is welded on the bottom wall of the elastic sheet 561, and the elastic sheet 561 is located at one end of the extension block 55 far away from the turntable 52 and extends out to the top of the next extension block 55. A square slot 564 is formed in one end, close to the rotary disc 52, of the upper plane of the extension block 55 of the insertion block 562, and an iron sheet is fixedly embedded in the inner bottom wall of the slot 564. The wall surface of the insertion block 562 far away from the elastic sheet 561 is fixedly adhered with a magnetic sheet 565, the insertion block 562 can be inserted and matched with the slot 564, and the magnetic sheet 565 and the iron sheet on the bottom wall of the slot 564 are mutually adsorbed. An inclined lug is extended from the end, far away from the extension block 55, of the elastic sheet 561 to the left and right of the insertion block 562, the wedge block 563 is fixed on the inner wall of the guide sleeve 54, and the sharp angle of the wedge block 563 faces to the end, far away from the rotary disc 52, of the guide sleeve 54. When the extension 55 extends toward the side of the guide sleeve 54 away from the rotating disk 52, the wedge 563 contacts the top wall of the resilient piece 561, pressing the plug 562 down into the slot 564. When the extension block 55 is retracted toward the rotation disk 52, the upper wall surface of the sharp corner of the wedge 563 contacts the lower edge of the tab of the resilient tab 561, tilting the resilient tab 561 and disengaging the insertion block 562 from the slot 564.

Referring to fig. 2 and 4, in order to prevent the extending block 55 wound on the rotating disc 52 from being loosened when the extending block 55 is retracted and retracted, a pressing roller 7 for pressing the extending block 55 on the rotating disc 52 is disposed on the top wall of the rotating base 3 and located on one side of the rotating disc 52, and the pressing roller 7 includes a rotating roller capable of being attached to the side wall of the extending block 55 and a torsion spring 71 for driving the pressing roller 7 to rotate so that the rotating roller presses the extending block 55. The torsion spring 71 is sleeved on the rotating shaft of the compression roller 7, and one end of the torsion spring is fixedly connected with the rotating seat 3, and the other end of the torsion spring is fixedly connected with the compression roller 7. The plurality of pressure rollers 7 are provided at regular intervals in the circumferential direction of the turntable 52.

Referring to fig. 2 and 3, the trolley 2 is provided with a bluetooth communication module 6 and a processing center 61, and the processing center 61 is electrically connected with the first motor 211, the second motor 311, the third motor 51 and the two cameras 4 respectively, and is used for controlling the start and stop of the three motors, the forward and reverse rotation of the three motors, and collecting picture contents shot by the cameras 4. The bluetooth communication module 6 is electrically connected with the processing center 61, so that an operator can control the operation of each motor and receive the picture content shot by the camera 4 through a remote computer.

Referring to fig. 2 and 3, a connection line 8 is provided between the camera 4 and the processing center 61 so that the camera 4 can be electrically connected to the processing center 61 when moving. In order to keep the connecting wire 8 neatly stored in the moving process of the camera 4, a winding disc 81 is rotatably mounted on the top wall of the rotating shaft. The axis of rolling dish 81 is on a parallel with the axis of rotating seat 3, is equipped with wiring mouth 82 in the rolling dish 81, and on the lateral wall of rolling platform was located to the one end of wiring mouth 82, the other end was located the top of rolling dish 81 to rotate the setting with rolling dish 81. The wiring port 82 at the top of the winding disc 81 is electrically connected with the processing center 61, the connecting wire 8 is wound on the winding disc 81, one end of the connecting wire is fixedly connected with the wiring port 82 at the side surface of the winding disc 81, and the other end of the connecting wire is fixedly connected with the camera 4. An elastic piece for driving the rolling disc 81 to rotate and keeping the connecting wire 8 tensioned is further arranged on the rotating seat 3, the elastic piece is a coil spring 83, and one end of the coil spring is fixedly connected with the rotating seat 3 while the other end of the coil spring is fixedly connected with the rolling disc 81.

The implementation principle of the embodiment is as follows: the operating personnel passes through the bluetooth communication function of remote computer, from positions such as bridge top surface, through long-range bluetooth communication, with 6 signal connection of bluetooth communication module on the dolly 2. Then, the signal is transmitted to the first motor 211 through the processing center 61, and the first motor 211 drives the friction roller 212 on the trolley 2 to rotate, so that the trolley 2 is driven to move on the cableway 1 under the action of the friction force between the friction roller 212 and the cableway 1. In the moving process of the trolley 2, the camera 4 collects the picture information of the bottom wall of the bridge and transmits the picture information to the remote computer.

When the camera 4 collects the crack of which the end part length extends out of the image collecting range of the camera 4, the second motor 311 is started to rotate the rotating seat 3 according to the inclination of the crack. When the arrangement direction of the two cameras 4 is approximately the same as the crack extension direction, the second motor 311 is stopped, and the third motor 51 is started to drive the two rotating discs 52 to synchronously rotate in the opposite directions. When the rotary disc 52 rotates, the extension block 55 extends outwards from the guide sleeve 54 to push the two cameras 4 to be away from each other synchronously, and when the two cameras pass through the guide sleeve 54, the wedge block 563 presses the elastic piece 561 downwards, the plug-in block 562 is inserted into the groove on the other extension block 55, and the two extension blocks 55 cannot rotate relatively any more. The two cameras 4 can be used for shooting linearly along the length direction of the crack, and a complete crack picture can be obtained on a remote computer. And then, the maximum length of the cracks on the collected picture is combined with the actual proportion of the picture by an operator for calculation, so that the actual length of the cracks can be obtained, the collection quantity of the pictures can be greatly reduced, the collection efficiency of the cracks and the pictures is improved, and the shooting is convenient.

s1, installing a fixing frame of the cableway 1 on the side wall of the bridge pier opposite to the adjacent bridge pier below the bridge, pulling the steel cable, firmly installing two ends of the steel cable on the fixing frame between the adjacent bridge piers, and tensioning the steel cable;

s2, arranging the trolley 2 on the cableway 1 in a sliding mode, enabling the lens of the camera 4 to face the bottom wall of the bridge, and rotating the rotating seat 3 until the two cameras 4 are arranged along the width direction of the bridge;

s3, the trolley 2 is driven to advance along the cableway 1 through the connection with the Bluetooth communication module 6 on the trolley 2 through the Bluetooth communication of the remote computer, and after the pictures of the bottom of the bridge are collected by the camera 4, the pictures are collected by the processing center 61 and sent to the remote computer;

s4, after the camera 4 collects the bridge crack, rotating the rotating seat 3 to enable the two ends of the crack extending out of the image collecting range of the camera 4 to be positioned on the outer edge of the sliding direction of the camera 4, driving the two cameras 4 to be away synchronously, and collecting the image of the tail end of the crack;

The operating personnel orders about two cameras 4 again through ordering about two camera 4 rotatory to with the crack length direction angle of arranging of unanimity basically, order about two cameras 4 and keep away from, can gather out complete crack image fast to make things convenient for later stage measurement operation.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a bridge crack measuring device for municipal bridge engineering which characterized in that: comprises a horizontal cableway (1) erected between adjacent piers along the length direction of a bridge and a trolley (2) arranged on the cableway (1) in a sliding manner, wherein the trolley (2) is provided with a driving device (21) for driving the trolley (2) to slide on a track, the top wall of the trolley (2) is horizontally and rotatably provided with a rotating seat (3), the trolley (2) is provided with a rotating device (31) for driving the rotating seat (3) to rotate, the top wall of the rotating seat (3) is provided with two cameras (4) facing the bottom wall of the bridge in parallel, the rotating seat (3) is provided with a linkage device (5) for driving the two cameras (4) to be radially and synchronously far away from and close to the rotating seat (3), the trolley (2) is provided with a Bluetooth communication module (6) in wireless communication with a user operation system, and the trolley (2) is provided with a processing center (61), the processing center (61) is electrically connected with the camera (4), and the processing center (61) is used for opening and closing the driving device (21) and the linkage device (5) and receiving data collected by the camera (4).

2. The bridge crack measuring device for municipal bridge engineering according to claim 1, characterized in that: the driving device (21) comprises a first motor (211), two friction rollers (212) and two first gears (213), the first motor (211) is fixedly arranged on the trolley (2), the two friction rollers (212) are arranged on the trolley (2) in a parallel rotating mode, the cableway (1) penetrates through the two friction rollers (212), the side wall of each friction roller (212) is in rolling contact with the cableway (1), the two first gears (213) are respectively and coaxially fixedly connected to the end faces of the two friction rollers (212) on the same side, the two first gears (213) are meshed with each other, and the output shaft of the first motor (211) is coaxially and fixedly connected with any one first gear (213).

3. The bridge crack measuring device for municipal bridge engineering according to claim 1, characterized in that: the rotating device (31) comprises a second motor (311), a second gear (312) and a gear ring (313), the gear ring (313) is coaxially and fixedly arranged on the bottom wall of the rotating seat (3), the second motor (311) is fixedly arranged on the trolley (2), the second gear (312) is coaxially and fixedly connected with an output shaft of the second motor (311), and the second gear (312) is meshed with the gear ring (313).

4. The bridge crack measuring device for municipal bridge engineering according to claim 1, characterized in that: the linkage device (5) comprises a third motor (51), two turntables (52), two toothed rings (53), a guide sleeve (54) and a plurality of extension blocks (55), wherein the two turntables (52) are arranged on the top wall of the rotating seat (3) in a rotating mode in a mirror image mode, the two toothed rings (53) are respectively and fixedly sleeved on the outer walls of the two turntables (52) in a coaxial mode, the two toothed rings (53) are meshed with each other, the extension blocks (55) are sequentially hinged end to end, hinge shafts at two ends of each extension block (55) are parallel to a rotating shaft of the corresponding turntable (52), one end of each extension block (55) is hinged to the corresponding turntable (52), the other end of each extension block (55) is fixedly connected with the corresponding camera (4), the extension blocks (55) are wound on the corresponding turntables (52), the guide sleeve (54) is fixedly arranged on one side of the corresponding turntable (52) along the radial direction of the rotating seat (3), the extension block (55) penetrates through the guide sleeve (54), and a linkage mechanism (56) which is used for fixing the extension blocks (55) extending out of the guide sleeve (54) mutually and enabling the extension blocks (55) to move mutually when the extension blocks (55) are retracted into a reel is arranged in the guide sleeve (54).

5. The bridge crack measuring device for municipal bridge engineering according to claim 4, wherein: the linkage mechanism (56) comprises an elastic sheet (561), an inserting block (562) and a wedge-shaped block (563), the elastic piece (561) is fixedly arranged at one end of the extension block (55) close to the hinged point with the rotating disc (52), the insertion block (562) is fixedly arranged on the elastic sheet (561), the outer wall of the extension block (55) which is vertical to the self-hinged shaft is provided with a slot (564) for the insertion of the insertion block (562), the elastic piece (561) is used for driving the plug-in block (562) to be separated from the slot (564), the wedge-shaped block (563) is fixedly arranged in the guide sleeve (54), the sharp angle of the wedge-shaped block (563) faces to one end of the guide sleeve (54) far away from the rotating disc (52), the bottom wall of the wedge-shaped block (563) can be contacted with the top wall of the elastic sheet (561), the wedge block (563) can contact with the bottom wall of the elastic sheet (561) towards the sharp corner of the guide sleeve (54).

6. The bridge crack measuring device for municipal bridge engineering according to claim 5, wherein: the wall surface of the insertion block (562) far away from the elastic sheet (561) is fixedly provided with a magnetic sheet (565) which can be attracted with the bottom wall of the slot (564).

7. The bridge crack measuring device for municipal bridge engineering according to claim 4, wherein: rotate and be provided with compressing roller (7) that are used for compressing tightly extension piece (55) on carousel (52) on seat (3), compressing roller (7) are articulated with rotating seat (3), the cover is equipped with torsional spring (71) that is used for ordering about compressing roller (7) rotation butt extension piece (55) on the articulated shaft of compressing roller (7), the one end and the rotating seat (3) fixed connection of torsional spring (71), the other end and compressing roller (7) fixed connection.

8. The bridge crack measuring device for municipal bridge engineering according to claim 1, characterized in that: connecting wire (8) have set firmly on camera (4), it is provided with rolling dish (81) that are used for accomodating connecting wire (8) to rotate on the roof of rotation seat (3), be equipped with wiring mouth (82) in rolling dish (81), the one end of wiring mouth (82) is located the lateral wall of rolling dish (81), the other end is located the terminal surface of rolling dish (81) and is connected with treatment center (61) electricity, connecting wire (8) are around establishing on rolling dish (81), camera (4) was kept away from in connecting wire (8) one end and the connector fixed connection on rolling dish (81) lateral wall, be provided with the elastic component that is used for ordering about rolling dish (81) rolling connecting wire (8) on rotation seat (3).

9. The bridge crack measuring device for municipal bridge engineering according to claim 8, wherein: the elastic piece is a coil spring (83), one end of the coil spring (83) is fixedly connected with the rotating seat (3), and the other end of the coil spring is fixedly connected with the winding disc (81).

10. A bridge crack measuring method for municipal bridge engineering, comprising the bridge crack measuring device for municipal bridge engineering of any one of claims 1 to 9, characterized by comprising the steps of:

s1, installing a fixing frame of the cableway (1) on the side wall of the bridge pier opposite to the adjacent bridge pier below the bridge, pulling the steel cable, firmly installing two ends of the steel cable on the fixing frame between the adjacent bridge piers, and tensioning the steel cable;

s2, arranging the trolley (2) on the cableway (1) in a sliding mode, enabling the lens of the camera (4) to face the bottom wall of the bridge, and rotating the rotating seat (3) until the two cameras (4) are arranged along the width direction of the bridge;

s3, the trolley (2) is driven to move forward along the cableway (1) through the connection of a Bluetooth communication module (6) on the trolley (2) through the Bluetooth communication of a remote computer, and after the pictures of the bottom of the bridge are collected by a camera (4), the pictures are collected by a processing center (61) and sent to the remote computer;

s4, after the camera (4) collects the bridge crack, rotating the rotating seat (3) to enable the two ends of the crack extending out of the image collecting range of the camera (4) to be located on the outer edge of the sliding direction of the camera (4), driving the two cameras (4) to be away from each other synchronously, and collecting the image of the tail end of the crack;