CN110487198A - A kind of monitoring device and method for bridge expanssion joint transversely deforming - Google Patents
A kind of monitoring device and method for bridge expanssion joint transversely deforming Download PDFInfo
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- CN110487198A CN110487198A CN201910859969.7A CN201910859969A CN110487198A CN 110487198 A CN110487198 A CN 110487198A CN 201910859969 A CN201910859969 A CN 201910859969A CN 110487198 A CN110487198 A CN 110487198A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 52
- 230000000007 visual effect Effects 0.000 claims abstract description 7
- 238000009408 flooring Methods 0.000 claims description 43
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of monitoring devices for bridge expanssion joint transversely deforming, comprising: the positioning plate equipped with Marking the cell line, on positioning plate；The laser of laser emitter, the laser emitter outgoing is beaten on positioning plate；Image capture device, visual field are parallel with positioning plate；Single-chip microcontroller monitors host computer, for obtaining location drawing picture information in real time by single-chip microcontroller, and is changed according to the relative position of location drawing picture information analysis laser beam.Its monitoring method is also disclosed, comprising steps of using the real-time acquisition position image information of image capture device, and it is transferred out by single-chip microcontroller in two sides installation positioning plate, laser emitter and the image capture device at expansion joint respectively；It monitors host computer and coordinate value of the laser beam in top plate is obtained according to location drawing picture information in real time, and monitor the situation of change at expansion joint.Monitoring device and method of the invention can pass through the deflection of automatic measurement bridge expanssion joint, accurate positioning, high degree of automation.
Description
Technical field
The present invention relates to engineering measuring technology field, in particular to a kind of monitoring for bridge expanssion joint transversely deforming fills
It sets and method.
Background technique
With the fast development of China's economic level, science of bridge building is widely applied in China, at present China's bridge construction
Beam is more than 800,000.Bridge has great influence to national economy, once great social shadow will be caused by safety accident occur
Loud and economic loss, the safety issue of bridge structure is paid attention to thus.Bridge expanssion joint displacement is to judge bridge safty
One of important parameter, always attract attention.The displacement of monitoring bridge expanssion joint mostly uses greatly guy type displacement meter, but bracing wire at present
Formula displacement meter can only monitor expansion joint in the relative displacement of bridge longitudinal (direction of traffic), and can not supervise to bridge lateral displacement
It surveys.In fact, certain lateral displacement can occur for bridge under the load actions such as traffic load, wind load, earthquake, and lateral position
Moving past will lead to greatly bridge floor and the serious safety accident such as topples.
Patent application document (ZL201910227191.8) discloses a kind of monitoring dress of super high-rise building story drift
It sets, including the laser emitter being arranged on the beam slab of upper layer, the locating circuit board being arranged on this layer of beam slab；The positioning circuit
It is provided with several laser pick-ofves laser pick-off head on plate and is connect with the position detecting device for detecting its coordinate.Pass through setting
On upper layer, the laser beam of beam slab laser transmitter projects beats the wherein laser pick-off head on locating circuit board, position detecting device
By connecting with laser pick-off head, the coordinate position of laser pick-off head hit by laser beam is judged；And further pass through technology
The change in location of laser beam, calculate building be horizontally oriented with the story drift on vertical direction, overcome in the prior art
Measurement error caused by equivalent measurement.
In above-mentioned patent application document, since the size of laser pick-off head itself is certain, between multiple laser pick-off heads
There certainly will be gap, when laser is beaten in gap, it may be difficult to be accurately positioned laser (laser beam) position；Furthermore laser pick-off head
Belong to Sensitive Apparatus, if astigmatism occurs in laser, will lead to multiple laser pick-off heads all while receiving laser signal, it is also difficult to essence
Certainly position laser position.
Summary of the invention
For overcome the deficiencies in the prior art, an object of the present invention is to provide a kind of for bridge expanssion joint laterally change
The monitoring device of shape, can be by the transversely deforming amount of laser emitter automatic measurement bridge expanssion joint, and laser positioning is smart
Standard, high degree of automation.
The second object of the present invention is to provide a kind of monitoring method for bridge expanssion joint transversely deforming, can pass through
The transversely deforming amount of laser emitter automatic measurement bridge expanssion joint, and laser positioning is accurate, high degree of automation.
In order to achieve the above object, the invention adopts the following technical scheme:
A kind of monitoring device for bridge expanssion joint transversely deforming, comprising:
Positioning plate is fixedly arranged on expansion joint to be measured wherein on the first floorings of side, and the positioning plate is equipped with grid mark
Know line；
Laser emitter is fixedly arranged on the second floorings of the expansion joint other side to be measured, and the laser emitter goes out
The laser penetrated is beaten on the positioning plate；
Image capture device is fixedly arranged on second floorings, falls in the positioning plate for acquiring laser beam in real time
On location drawing picture information, described image acquire equipment visual field it is parallel with the positioning plate；
Single-chip microcontroller is set on second floorings, is connect with described image acquisition equipment, to obtain the location drawing picture
Information；
Host computer is monitored, is connect with the single-chip microcontroller, for receiving the location drawing picture information, and according to the location drawing
As the relative position variation of information analysis laser beam, expansion joint transversely deforming monitoring is realized.
It further, further include the wireless transport module being connected between the single-chip microcontroller and the monitoring host computer, institute
Single-chip microcontroller is stated for the location drawing picture information to be transmitted to the monitoring host computer by the wireless transport module.
It further, further include circuit board, it is miniature camera that described image, which acquires equipment,；
The laser emitter, miniature camera, single-chip microcontroller and wireless transport module are integrally disposed in the circuit board
On, the circuit board is fixedly arranged on second floorings.
Further, the circuit board is equipped with several first grooves, the laser emitter and miniature camera difference
It is removably embedded in first groove.
Further, second floorings are equipped with the second groove, and the circuit board is removably embedded at described
In second groove.
Further, the depth of first groove is 8~12mm, and the depth of the second groove is 8~10mm.
Further, dismountable first enclosing is equipped with around the circuit board, first enclosing is towards bridge pier
One side opening.
Further, dismountable second enclosing is equipped with around the positioning plate, second enclosing is towards bridge pier
One side opening.
The invention also discloses a kind of monitoring methods for bridge expanssion joint transversely deforming, are filled using above-mentioned monitoring
It sets, includes the following steps:
S1: positioning plate is installed on the first floorings respectively, laser emitter and Image Acquisition are set on the second floorings
Equipment, and keep the visual field of described image acquisition equipment parallel with the positioning plate；
S2: image capture device acquires the location drawing picture information that laser beam is fallen on the positioning plate in real time, and will be described
Location drawing picture information is transferred out by single-chip microcontroller；
S3: the monitoring host computer receives the location drawing picture information and calculates laser beam according to the location drawing picture information
Coordinate value in top plate, to change the situation of change at real-time monitoring expansion joint according to coordinate value.
Further, the monitoring host computer receives the location drawing picture that the single-chip microcontroller is sent by wireless transport module and believes
Breath.
Compared with prior art, the invention has the benefit that
Monitoring device and monitoring method of the invention, by the way that laser emitter and positioning plate are divided into expansion joint two sides
On floorings, and acquire location drawing picture information of the laser beam on positioning plate in real time towards positioning plate using image capture device,
Location drawing picture information is then transferred to monitoring host computer using single-chip microcontroller and carries out image recognition analysis to obtain laser beam fixed
Position plate on change in location, by comparing laser beam front-rear position variation can real-time monitoring expansion joint situation of change.This hair
Bright monitoring device can variation real-time automatic monitoring to expansion joint, high degree of automation is easy to use operation；The prison simultaneously
Device is surveyed by the location drawing picture information of the acquisition laser beam of image capture device real-time and precise, by with image recognition analysis
The monitoring host computer of function can accurately know the position of laser beam, improve the accuracy of laser beam position positioning, Jin Erti
The high accuracy of monitoring device.
Detailed description of the invention
Now in conjunction with attached drawing, the invention will be further described with specific embodiment:
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the I--I cross-sectional view of Fig. 1.
Fig. 3 is the enlarged drawing of circuit board.
Fig. 4 is the II--II cross-sectional view of Fig. 1.
Fig. 5 is the enlarged drawing of positioning plate.
Description of symbols:
1, bridge pier, the 2, first floorings, the 3, second floorings, 4, positioning plate, 41, Marking the cell line；5, circuit board, 6, swash
Optical transmitting set, 7, miniature camera, 8, wireless transport module, 9, single-chip microcontroller, 10, monitoring host computer；11, the first enclosing, 12,
Two enclosings, 13, bolt connection assembly.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
As shown in Fig. 1~5, the present invention provides a kind of monitoring devices for bridge expanssion joint transversely deforming, comprising:
Positioning plate 4 is fixedly arranged on expansion joint to be measured wherein on the first floorings 2 of side, and positioning plate 4 is equipped with Marking the cell
Line 41；
Laser emitter 6 is fixedly arranged on the second floorings 3 of the expansion joint other side to be measured, and what laser emitter 6 was emitted swashs
Light is beaten on positioning plate 4；
Image capture device, is fixedly arranged on the second floorings 3, the position fallen on positioning plate 4 for acquiring laser beam in real time
Image information is set, the visual field of image capture device is parallel with positioning plate 4；
Single-chip microcontroller 9 is set on the second floorings 3, is separately connected with image capture device, to obtain the location drawing picture letter
Breath；
Host computer 10 is monitored, is connect with single-chip microcontroller 9, for receiving position image information, and according to location drawing picture information point
The relative position variation of laser beam is analysed, monitoring host computer 10 is connect with single-chip microcontroller 9, realizes expansion joint transversely deforming monitoring.
Monitoring device of the invention, by the floorings that laser emitter 6 and positioning plate 4 are divided into expansion joint two sides
On, and location drawing picture information of the laser beam on positioning plate 4 is acquired in real time towards positioning plate 4 using image capture device, then
Location drawing picture information the monitoring progress image recognition analysis of host computer 10 is transferred to using single-chip microcontroller 9 to position to obtain laser beam
Change in location on plate 4, by comparing laser beam front-rear position variation can real-time monitoring expansion joint situation of change.The present invention
Monitoring device can variation real-time automatic monitoring to expansion joint, high degree of automation is easy to use operation；The monitoring simultaneously
Device passes through the location drawing picture information of the acquisition laser beam of image capture device real-time and precise, by with image recognition analysis function
The monitoring host computer 10 of energy can accurately know the position of laser beam, improve the accuracy of laser beam position positioning, Jin Erti
The high accuracy of monitoring device.
Specifically, the first floorings 2 and the second floorings 3 are placed on bridge pier 1.
Marking the cell line 41 marks off several lattices on positioning plate 4, so that can meet simultaneously to expansion joint X-axis and Y
The measurement deformed in axis both direction.And it can adjust the size of lattice on 4 receiving plane of positioning plate to adjust the essence of monitoring device
Exactness, in general, Marking the cell line 41 is more intensive, i.e. the smaller measurement accuracy of lattice is higher.
It as one embodiment, further include the nothing being connected between single-chip microcontroller 9 and monitoring host computer 10 as shown in Fig. 1~5
Line transmission module 8, single-chip microcontroller 9 are used to that location drawing picture information to be transmitted to monitoring host computer 10 by wireless transport module 8.It utilizes
Wireless transport module 8 carries out the transmission of location drawing picture information, is convenient for remote data transmission.
It in the above-described embodiments, further include circuit board 5 as shown in Fig. 1~5, image capture device is miniature camera 7；
Laser emitter 6, miniature camera 7, single-chip microcontroller 9 and wireless transport module 8 are integrally disposed on circuit board 5,
Circuit board 5 is fixedly arranged on the second floorings 3.
Wherein, circuit board 5 is equipped with several first grooves, and laser emitter 6 and miniature camera 7 are removably embedding respectively
In the first groove.In one embodiment, the first groove is equipped with 2, is respectively used to place laser emitter 6 and miniature
Camera 7.The depth of first groove is in 8~12mm.In order to facilitate replacement laser emitter 6 and miniature camera 7 lithium battery,
The two is detachably connected with circuit board 5 respectively.
The second groove is offered on second floorings 3, circuit board 5 is removably embedded in the second groove.This second
The depth of groove is 8~10mm.
Likewise, also offering third groove on the first floorings 2, positioning plate 4 is removably embedded in third groove.
In the above-described embodiments, as shown in Figures 1 to 3, around circuit board 5 be equipped with dismountable first enclosing 11, first
A side opening of the enclosing 11 towards bridge pier 1.First enclosing 11 is bolted component 13 and is installed on the second floorings 3.
Dismountable second enclosing 12, a side opening of second enclosing 12 towards bridge pier 1 are equipped with around positioning plate 4.The
Component 13 is bolted respectively and is fixedly arranged on the floorings of expansion joint two sides for one enclosing 11 and the second enclosing 12.It can be daily
Play the role of waterproofing protection in use.In one embodiment, the first enclosing 11 and the second enclosing 12 are all made of metal material
Material is made.
The invention also discloses a kind of monitoring methods for bridge expanssion joint transversely deforming, use the above-mentioned prison of right
Device is surveyed, is included the following steps:
S1: positioning plate 4 is installed on the first floorings 2 respectively, laser emitter 6 and image are set on the second floorings 3
Equipment is acquired, and keeps the visual field of image capture device parallel with positioning plate 4；
S2: image capture device acquires the location drawing picture information that laser beam is fallen on positioning plate 4 in real time, and by location drawing picture
Information is transferred out by single-chip microcontroller 9；
S3: monitoring host computer 10 receives position image information and calculates laser beam in top plate according to location drawing picture information
Coordinate value, with according to coordinate value change real-time monitoring expansion joint situation of change.
Wherein, monitoring host computer 10 receives the location drawing picture information that single-chip microcontroller 9 is sent by wireless transport module 8.This hair
Bright monitoring method by the way that laser emitter 6 and positioning plate 4 to be divided on the floorings of expansion joint two sides, and utilizes image
It acquires equipment and acquires location drawing picture information of the laser beam on positioning plate 4 in real time towards positioning plate 4, it then will using single-chip microcontroller 9
Location drawing picture information is transferred to monitoring host computer 10 and carries out image recognition analysis to obtain position of the laser beam on positioning plate 4 and become
Change, by comparing laser beam front-rear position variation can real-time monitoring expansion joint situation of change.Monitoring device energy of the invention
Enough variation real-time automatic monitorings to expansion joint, high degree of automation are easy to use operation；The monitoring device passes through image simultaneously
The location drawing picture information of the acquisition laser beam of equipment real-time and precise is acquired, it is upper by the monitoring with image recognition analysis function
Machine 10 can accurately know the position of laser beam, improve the accuracy of laser beam position positioning, and then improve monitoring device
Accuracy.
Embodiment 1
As shown in Fig. 1~5, monitoring device of the invention includes positioning plate 4, circuit board 5, monitoring host computer 10, first encloses
Gear 11 and the second enclosing 12.Wherein positioning plate 4 and circuit board 5 are separately positioned on the floorings of expansion joint two sides, and two sides
Floorings are both placed on bridge pier 11.
Reserve respectively fluted on the floorings of two sides, the depth of the groove is appropriate, in 8~10mm.Circuit board 5 passes through spiral shell
It tethers connected components 13 to be removably embedded in groove, wherein bolt connection assembly 13 and the connection depth of floorings are appropriate, about
For 8~10mm.
Circuit board 5 is equipped with laser emitter 6, miniature camera 7, single-chip microcontroller 9, wireless transport module 8,5 He of circuit board
The connection of component 13 is bolted in floorings, wherein appropriate, the about 8~10mm that connects depth with floorings of circuit board 5；
Circuit board 5 is opened there are two the first groove, and depth is appropriate, about 8~12mm, laser emitter 66 and miniature camera
77 are installed in respectively in the first groove.In order to facilitate the lithium battery of replacement laser emitter 6 and miniature camera 7, the two and electricity
The connection of road plate 5 can be freely disassembled.To play waterproof, protection circuit plate 5 and positioning plate 4 are from damaging simultaneously, in circuit board 5
Metal enclosing is added with the periphery of positioning plate 4.
The installation of above-mentioned monitoring device and monitoring method are as follows:
Floorings in expansion joint two sides to be measured reserve groove, and depth is appropriate, about 8~10mm.
Circuit board 5 is placed in the reserved groove of expansion joint side floorings, and the connection of component 13 is bolted；In electricity
Fixed laser transmitter 6 and miniature camera 7 in the groove of road plate 53, and miniature camera 77 is connected with 9 pin of single-chip microcontroller,
Single-chip microcontroller 9 and wireless transmission connection.
Component 13 is bolted with positioning plate 4 in the floorings of the expansion joint other side to connect, installation connection depth
Suitably, about 8~10mm.To guarantee that positioning plate 4 can smoothly receive the laser beam of laser emitter 6, laser emitter 6 and fixed
The central axes of position plate 4 are in the same horizontal position.
It is waterproof and protection circuit plate 5 and positioning plate 4 from damaging, metal enclosing is installed additional by its periphery and is protected.
The laser beam of original state laser emitter 6 is beaten on positioning plate 4, is taken pictures by miniature camera 7
Record；Photo is transmitted to 9 module of single-chip microcontroller by miniature camera 7, and picture is sent to monitoring host computer by wireless transport module 8
10.The program of operation image identification technology in monitoring host computer 10, to the laser beam of laser emitter 6 positioning plate 4 just
Beginning position is demarcated, and X is denoted as1、Y1。
Under outer load action, bridge expanssion joint is laterally deformed, and the laser beam of laser emitter 6 is in positioning plate 4
It changes, is photographed to record by miniature camera 7；Photo is transmitted to 9 module of single-chip microcontroller by miniature camera 77, passes through nothing
Picture is sent to monitoring host computer 10 by line transmission module 8.The program of operation image identification in monitoring host computer 10, to laser
The laser beam of transmitter 6 is demarcated in the position of positioning plate 4, is denoted as X2、Y2。
After host computer 10 to be monitored carries out processing analysis to monitoring data, bridge expanssion joint transverse direction both direction X can be obtained
With the displacement dx and dy of Y.It is specific as follows:
Dx=∣ X2-X1∣；Dy=∣ Y2-Y1∣
Measurement accuracy is related with the rectangular partition quantity of positioning plate 44, and it is higher to divide the smaller measurement accuracy of rectangle.
The invention is not limited to above embodiment, if not departing from the present invention to various changes or modifications of the invention
Spirit and scope, if these modification and variations belong within the scope of claim and equivalent technologies of the invention, then this hair
It is bright to be also intended to encompass these changes and change.
Claims (10)
1. a kind of monitoring device for bridge expanssion joint transversely deforming characterized by comprising
Positioning plate is fixedly arranged on expansion joint to be measured wherein on the first floorings of side, and the positioning plate is equipped with Marking the cell line；
Laser emitter is fixedly arranged on the second floorings of the expansion joint other side to be measured, the laser emitter outgoing
Laser is beaten on the positioning plate；
Image capture device is fixedly arranged on second floorings, is fallen on the positioning plate for acquiring laser beam in real time
Location drawing picture information, the visual field that described image acquires equipment are parallel with the positioning plate；
Single-chip microcontroller is set on second floorings, is connect with described image acquisition equipment, to obtain the location drawing picture letter
Breath；
Host computer is monitored, is connect with the single-chip microcontroller, is believed for receiving the location drawing picture information, and according to the location drawing picture
The relative position variation of breath analysis laser beam, realizes expansion joint transversely deforming monitoring.
2. monitoring device according to claim 1, which is characterized in that further include being connected to the single-chip microcontroller and the monitoring
Wireless transport module between host computer, the single-chip microcontroller are used for the location drawing picture information through the wireless transport module
It is transmitted to the monitoring host computer.
3. monitoring device according to claim 2, which is characterized in that further include circuit board, described image acquisition equipment is
Miniature camera；
The laser emitter, miniature camera, single-chip microcontroller and wireless transport module are integrally disposed on the circuit board, institute
Circuit board is stated to be fixedly arranged on second floorings.
4. monitoring device according to claim 3, which is characterized in that the circuit board is equipped with several first grooves, institute
Laser emitter and miniature camera is stated removably to be embedded at respectively in first groove.
5. monitoring device according to claim 4, which is characterized in that second floorings are equipped with the second groove,
The circuit board is removably embedded in second groove.
6. monitoring device according to claim 5, which is characterized in that the depth of first groove be 8~12mm, second
The depth of groove is 8~10mm.
7. monitoring device according to claim 3, which is characterized in that be equipped with dismountable first around the circuit board
Enclosing, a side opening of first enclosing towards bridge pier.
8. monitoring device according to claim 7, which is characterized in that be equipped with dismountable second around the positioning plate
Enclosing, a side opening of second enclosing towards bridge pier.
9. a kind of monitoring method for bridge expanssion joint transversely deforming, which is characterized in that using any in claim 1~8
Monitoring device described in, includes the following steps:
S1: installing positioning plate on the first floorings respectively, laser emitter and image capture device be arranged on the second floorings,
And keep the visual field of described image acquisition equipment parallel with the positioning plate；
S2: image capture device acquires the location drawing picture information that laser beam is fallen on the positioning plate in real time, and by the position
Image information is transferred out by single-chip microcontroller；
S3: the monitoring host computer receives the location drawing picture information and calculates laser beam according to the location drawing picture information and pushing up
Coordinate value on plate plate, to change the situation of change at real-time monitoring expansion joint according to coordinate value.
10. monitoring method according to claim 9, which is characterized in that in step s3, the monitoring host computer passes through nothing
Line transmission module receives the location drawing picture information that the single-chip microcontroller is sent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910859969.7A CN110487198A (en) | 2019-09-11 | 2019-09-11 | A kind of monitoring device and method for bridge expanssion joint transversely deforming |
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| CN201910859969.7A CN110487198A (en) | 2019-09-11 | 2019-09-11 | A kind of monitoring device and method for bridge expanssion joint transversely deforming |
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| CN111174720A (en) * | 2020-03-18 | 2020-05-19 | 福州市规划设计研究院 | Bridge expansion joint width distributed monitoring device and method based on binocular vision |
| CN112815824A (en) * | 2020-12-31 | 2021-05-18 | 深圳市天健工程技术有限公司 | Bridge safety three-dimensional monitoring device based on Beidou positioning system |
| CN112815824B (en) * | 2020-12-31 | 2022-10-21 | 深圳市天健工程技术有限公司 | Bridge safety three-dimensional monitoring device based on Beidou positioning system |
| CN112880544A (en) * | 2021-01-13 | 2021-06-01 | 马洲 | Bridge expansion joint alarm device for road engineering |
| CN112880544B (en) * | 2021-01-13 | 2022-09-09 | 马洲 | Bridge expansion joint alarm device for road engineering |
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