CN206223095U - For large structure vertical displacement or the self-calibration measurement apparatus of deformation - Google Patents
For large structure vertical displacement or the self-calibration measurement apparatus of deformation Download PDFInfo
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- CN206223095U CN206223095U CN201620833764.3U CN201620833764U CN206223095U CN 206223095 U CN206223095 U CN 206223095U CN 201620833764 U CN201620833764 U CN 201620833764U CN 206223095 U CN206223095 U CN 206223095U
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Abstract
The utility model discloses a kind of for large structure vertical displacement or the self-calibration measurement apparatus of deformation parameter,Including data processing centre,Imaging system,Benchmark parallel target,Hydrostatic level and the measurement target drone no less than,Described hydrostatic level includes some sedimentation probes and fluid-through tube,Described sedimentation probe and measurement target drone are fixed on side wall or the top of large structure,Described benchmark parallel target is disposed therein certain and only settles on probe,And benchmark parallel target and measurement target drone are imaged on the diverse location of the sensitivity unit of imaging system,After data processing centre obtains the measurement result of hydrostatic level and imaging system,Popped one's head according to sedimentation,The measurement result of benchmark parallel target and measurement target drone,It is calculated displacement or the deformation parameter of measurement point,The utility model overcomes the displacement that measuring system is produced because imaging system is subject to the reason such as load or the deformation of itself installation foundation,Ultimately result in the measurement error of system,Improve certainty of measurement.
Description
Technical field
The utility model belongs to mechanical meaurement technical field, is related to one kind to be filled for large structure displacement and distortion measurement
Put, the device and method of particularly a kind of self-alignment long-range displacement or distortion measurement.
Background technology
Including bridge, dam, tunnel, slope and building construction etc., its deformation mainly includes static deformation to large structure
And dynamic deformation, static deformation refers to that ground sink, inclines and the very slow deformation of the change such as stress relaxation, dynamic deformation refer to by
The shortterm deflection that Yu Feng, temperature, earthquake, traffic load or site operation etc. cause, its parameter monitoring is commented for the safety of target
Estimating analysis has important effect.
Traditional large structure such as bridge, the instrument of its deformation detection have dial gauge, amesdial, accelerometer, spirit level,
Theodolite etc..At present, these instruments are still widely used in bridge acceptance, periodic detection, however it is necessary that professional and technical personnel,
Time-consuming, laborious, human error is big, far can not realize online, real-time, automatic, intelligent measure.In recent years, information technology is fluffy
The exhibition of breaking out has driven the development of bridge deformation e measurement technology significantly, has emerged in large numbers many new technology and methods, such as laser amount of deflection
Method and GPS (Global Position System) positioning measurement method.Laser flexometer can realize the displacement measurement of submillimeter, but
It is that range is only capable of reaching several tens cm, it is impossible to meet the larger measurement for bridge large deformation of span, its vertical displacement is reachable
Meter level；Gps position measurement method can realize the large deformation of real-time online measuring bridge, but its precision intelligently reaches Centimeter Level, and
High cost, limits its popularization and application.
Since latter stage seventies solid state image sensor occurs, there are many scholars both at home and abroad with image sensings such as CCD
Device is medium, and image processing techniques is used for the research of bridge, beams of concrete deformation measurement.Application No. 200820241096.0
Chinese patent " a kind of bridge moving displacement measuring device based on machine vision " disclose and a kind of combined by lasing light emitter and CCD
Measure bridge dynamic deformation measurement apparatus, by bridge distal end with CCD record bridge deformation during laser beam position
Change is put, the deformation parameter of bridge is calculated.The subject matter of this kind of displacement transducer presence is at present：Ccd image is sensed
Device needs to be used in combination with alignment laser, increased the complexity of system.
A kind of Chinese patent " Real-time Monitoring System of Bridges " of Application No. 201410145554.0 discloses a kind of bridge
, be held away from power-up target in the fixed target of bridge in use by the remote measuring unit of dynamic displacement, and is needed in bridge
The place for monitoring displacement is provided with CCD cameras so that target is imaged in the photosensitive units of CCD, by the real-time target figure for obtaining
As the position on CCD, the dynamic displacement on bridge tested point is calculated.The problem that this scheme is present is：When monitoring is
System is used in tunnel, in grotto etc. during occasion, because CCD cameras and measurement target drone can produce position with the influence of extraneous load
Move and deformation, and because the position that the two is installed is different, the displacement of measurement target drone and CCD cameras that extraneous load causes is not
Together, cause measurement result to occur in that larger error, have impact on certainty of measurement.
Utility model content
The utility model proposes a kind of self-calibration measurement apparatus for large structure vertical displacement or deformation and
Method, for large scale structure composition deformation or the self-calibration measurement apparatus and method of displacement parameter, in the base of traditional measurement target
A benchmark parallel target and a hydrostatic level are increased on plinth, and the benchmark parallel target fixes the sedimentation probe of hydrostatic level
On, the displacement absolute value of accurate benchmark parallel target is obtained by hydrostatic level, so as to the positional value to measurement target drone is modified
Calibration, finally obtains the precise displacement value of measurement point.
Technology contents of the present utility model are as follows：
For large structure vertical displacement or the self-calibration measurement apparatus of deformation, including data processing centre, imaging
System, benchmark parallel target, hydrostatic level and the measurement target drone no less than, described hydrostatic level include some sedimentations
Probe and fluid-through tube, described sedimentation probe and measurement target drone are fixed on side wall or the top of large structure, described benchmark
Target is disposed therein certain and only settles on probe, and benchmark parallel target and measurement target drone are in the first diverse location of the sensitivity of imaging system
Upper imaging, after data processing centre obtains the measurement result of hydrostatic level and imaging system, according to sedimentation probe, benchmark parallel target
With the measurement result of measurement target drone, displacement or the deformation parameter of measurement point are calculated.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, large structure is tunnel
Road, grotto, house or basement.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, the benchmark of hydrostatic level
Sedimentation probe is arranged on large structure external displacement or deforms insignificant region.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, benchmark parallel target and measurement target
It is designated as the power-up target of specific pattern or continuous work.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, power-up target is to line up one
LED the or LD light bar of setting shape.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, hydrostatic level and imaging
System is transmitted measurement result at data by wireless GPRS system, mobile radio network transport module or optical cable transmission system
Reason center.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, imaging system includes optics
Camera lens, imageing sensor, core control function unit, treatment memory cell and remote communication unit；Described imageing sensor
It is CCD or cmos sensor, described core control function unit includes trigger signal detection module, image data acquiring mould
Block, image gray processing and Zoom module and target image feature lift and identification module, for the treatment and identification of target image；
Described treatment memory cell is connected with core control function unit, for the storage and treatment of view data；Described is long-range
Communication unit couples with treatment memory cell, for the long-range transmission of view data.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, core control function unit
Built by DSP.
In the above-mentioned self-calibration measurement apparatus for large structure vertical displacement or deformation, imaging system is CCD pictures
Machine or cmos sensor.
For large structure vertical displacement or the self-calibration measuring method of deformation, comprise the following steps：
[1] install：Measurement target drone, benchmark parallel target, wherein hydrostatic level, hydrostatic level are installed on large structure
Measurement sedimentation probe and measurement target drone be fixed on side wall or the top of large structure, measurement target drone is arranged on point position to be measured
Put, benchmark parallel target is arranged on corresponding measurement sedimentation probe；
[2] measure：Open imaging system so that benchmark parallel target and measurement target drone are in the different positions of the sensitivity unit of imaging system
Imaging is put, hydrostatic level is opened, the height value of the measurement sedimentation probe where measuring basis target；
[3] calibrate：Data processing is carried out to imaging system, the shift value of benchmark parallel target and measurement target drone is obtained；To static(al)
Spirit level carries out data processing, is calculated the shift value of measurement sedimentation probe；And according to the shift value pair of measurement sedimentation probe
The shift value of measurement target drone is modified calibration, deducts the measurement error that imaging system is brought by itself installation foundation displacement, obtains
Obtain the real displacement value of measurement point where measurement target drone.
In the above-mentioned self-calibration measuring method for large structure vertical displacement or deformation, the calibration step in rapid [3]
Suddenly include：
[3.1] the change in location value according to measurement target drone, and combine the distance between measurement target drone and imaging system, imaging
The optical parametric of system, is calculated the shift value x1 of measurement target drone；
[3.2] the change in location value according to benchmark parallel target, and combine the distance between benchmark parallel target and imaging system, imaging
The optical parametric of system, is calculated the shift value x0 of benchmark parallel target；
[3.3] according to benchmark sedimentation probe in hydrostatic level and the liquid level of measurement sedimentation probe, it is calculated survey
The shift value y0 of amount sedimentation probe；
[3.4] the displacement x 11=x1+y0-x0 of the measurement point where calibrated rear measurement target drone.
The Advantageous Effects that the utility model has are as follows：
1st, the utility model increased on the basis of the displacement measuring device that existing CCD cameras and measurement target drone are constituted
One benchmark parallel target and hydrostatic level, and benchmark parallel target is arranged on a measurement sedimentation probe of hydrostatic level, by
Hydrostatic level provides the absolute displacement values of measurement sedimentation probe；In installation and debugging so that benchmark parallel target and measurement target drone are same
When be imaged on CCD cameras, and in data handling, shift value according to benchmark parallel target corrects the displacement of real measurement point
Value, so as to overcome the displacement that measuring system is produced because imaging system is subject to the reason such as load or the deformation of itself installation foundation,
Improve certainty of measurement.
2nd, the benchmark sedimentation probe and some measurements that hydrostatic level of the present utility model is connected including fluid-through tube are heavy
Drop probe, measurement sedimentation probe and measurement target drone are fixed on side wall or the top of large structure, and benchmark parallel target is disposed therein
Certain is only measured on sedimentation probe, and benchmark sedimentation probe is arranged on large structure external displacement or deforms insignificant region, leads to
The relation crossed between benchmark sedimentation probe and measurement sedimentation probe, is calculated the precise displacement of measurement sedimentation probe, if while
Dry measurement sedimentation probe is distributed in multiple measurement points in measured tunnel, is engaged with several imaging systems, target, realizes
The distributed self-correcting locating tab assembly of parameters for tunnel.
3rd, core control function unit of the present utility model uses embedded system, compact conformation reliability, convenient application；Together
When be provided with telecommunication transmission unit, the result that can be measured is by the wireless transmitting system such as gprs system, 3G wireless networks
Or the line transmission system such as optical cable, transmit to the night shift room of distal end, meeting long-range unattended round-the-clock field work will
Ask.
4th, target of the present utility model uses LED the or LD light bar of power-up as target, it is possible to achieve 24 hours round-the-clock
Work, and with characteristic target extract the convenient and degree of accuracy it is high the characteristics of, certainty of measurement is also accordingly improved.
Brief description of the drawings
Fig. 1 is that the utility model self-calibration measurement apparatus monitor application principle schematic diagram in tunnel；
Fig. 2 is that measurement apparatus measure schematic layout pattern in tunnel certain；
Fig. 3 is principle schematic of the hydrostatic level under initial static state；
Fig. 4 is principle schematic of the hydrostatic level under displacement measurement state；
Target and measurement target drone the image space schematic diagram on CCD pixels on the basis of Fig. 5；
Fig. 6 is the utility model imaging system theory of constitution schematic diagram；
Reference is as follows：1-optical lens；2-imageing sensor；3-trigger control unit；4-telecommunication list
Unit；5-core control function unit；6-treatment memory cell；11-large structure；12-imaging system；13-measurement target
Mark；14-benchmark parallel target；15-pole；16-measurement target drone image；17-benchmark parallel target image；18-display screen；
20 --- data processing centre；21-benchmark sedimentation probe；22-measurement sedimentation probe；23-fluid-through tube；24-deformation measurement
Region；25-stability region；
Specific embodiment
Measuring system of the present utility model is mainly used in the displacement of some key positions or distortion measurement on large structure,
Wherein large structure includes bridge, dam, tunnel, slope and building construction, below by taking tunnel as an example.
As depicted in figs. 1 and 2, for large structure vertical deformation or the self-calibration measurement apparatus of displacement parameter, bag
Data processing centre 20, imaging system 12, benchmark parallel target 14, hydrostatic level and the measurement target drone no less than 13 are included, it is quiet
Power spirit level includes the benchmark sedimentation probe 21 being connected by fluid-through tube 23 and some measurement sedimentation probes 22.Data processing
The heart 20 is arranged on measurement distal end, and imaging system 12 is arranged on the suitable position of large structure, measurement sedimentation probe 22 and measurement
Target 13 is fixed on side wall or the top of large structure 11, and benchmark parallel target 14 is disposed therein certain and only measures sedimentation probe 22
On, and benchmark parallel target 14 and measurement target drone 13 imaging, data processing centre on the diverse location of the sensitivity unit of imaging system 12
After obtaining the measurement result of hydrostatic level and imaging system, according to the measurement knot of sedimentation probe, benchmark parallel target and measurement target drone
Really, displacement or the deformation parameter of measurement point are calculated.
Because imaging system is fixed on large structure in application is measured, itself produces displacement and change also with basis
Shape, causes the inaccurate of measurement result, in order to correct the error that imaging system itself is brought, the basic target that the utility model is introduced
Mark, and benchmark parallel target is fixed on one of hydrostatic level sedimentation probe, and outcome measurement by hydrostatic level obtains
To the displacement parameter of benchmark parallel target, so only need to measure the relative displacement obtained between benchmark parallel target and measurement target drone, you can
To obtain the exact shift of measurement point, so as to itself calibrating to imaging system.
The operation principle of hydrostatic level gives 1#, 2#, 3# and 4# probe, wherein 1# as shown in Figure 3 and Figure 4, in figure
Probe as benchmark sedimentation probe 21, be arranged on large structure be arranged on the displacement of large structure outside or inside or deformation can
The stability region 25 ignored, and 2#, 3# and 4# probe are then arranged on the top in tunnel, waist etc. and need as measurement sedimentation probe 14
The region to be measured, benchmark parallel target 22 is fixed with measurement sedimentation probe therein.Imaging system 12 is by the base during measurement
Other measurement target drones in quasi- target and the region are imaged together, relative between measurement target drone and benchmark parallel target so as to be calculated
Displacement.
Hydrostatic level under initial static state, put down by the fluid level of the every measuring probe connected by fluid-through tube in Fig. 3
Together, i.e. H10=H20=H30=H40, when hydrostatic level is in the displacement measurement state shown in Fig. 4,1# probes are in steady
Region is determined, as datum level；And 2#, 3#, 4# are in measured zone, liquid is occurred in that as the upper-lower position of measurement point rises and falls
Face rises or falls.
According to the measuring principle of hydrostatic level, there are △ h1=H1-H10, △ h2=H2-H20, △ h3=H3-H30, △
H4=H4-H40 △ hi=Hi-Hi0.Wherein result of calculation：△ hi are on the occasion of the expression measuring point Liquid storage container
Interior liquid level is raised, and △ hi represent the liquid level reduction in the measuring point Liquid storage container for negative value.Point on the basis of elected location survey point 1, then
The vertical displacement (settling amount) of other each measuring point relative datum points is：△ H2=△ h1- △ h2, △ H3=△ h1- △ h3, △ H4
=△ h1- △ h4, △ Hi=△ h1- △ hi.Wherein result of calculation：△ Hi are on the occasion of the expression measuring point ground
Raise, △ Hi represent the measuring point settlement of foundation for negative value.If it is known that the horizontal range L between two measuring points, then relative between two measuring points
Inclined change is also obtained finally.It follows that poor by measuring the liquid level between sedimentation probe and benchmark sedimentation probe, you can
To the shift value of material sedimentation probe, and then also obtain being arranged on the shift value that the material settles the benchmark parallel target on probe.
The imaging of measurement target drone 13 and benchmark parallel target 14 in the photosensitive units of CCD is as shown in figure 5,16,17 respectively survey in figure
Amount target image and benchmark parallel target image, 18 is display screen.It is zero or displacement very little because benchmark parallel target 14 is in displacement
Near bridge pier, therefore its displacement is negligible, and measurement target drone 13 and imaging system 12 are in bridge middle part displacement and deformation most
Big region, when load-carrying vehicle sails bridge into, can cause that the image of measurement target drone 13 produces the displacement x 1 of above-below direction, form
As the background displacement that system CCD itself is produced is exactly the displacement x O of benchmark parallel target 14, it is deducted, can obtain accurately survey
Amount point shift value.
As shown in Figure 6, imaging system includes that optical lens 1, imageing sensor 2, core control function unit 5, treatment are deposited
Storage unit 6 and remote communication unit 4；Imageing sensor 2 is CCD or cmos sensor, and core control function unit 5 includes triggering
Signal detection module, image data acquiring module, image gray processing and Zoom module and target image feature lift and recognize mould
Block, for the treatment and identification of target image；Treatment memory cell 6 is connected with core control function unit 5, for view data
Storage and treatment；Remote communication unit 4 couples with treatment memory cell 6, for the long-range transmission of view data.
Optical lens 1 aims at the target set in measured target, the camera lens of optional varifocal in the application, by difference away from
On, different size of target imaging to imageing sensor, this working method has good adaptability to measurement target, and
With measurement range it is big the characteristics of, wherein imageing sensor 2 be CCD or cmos sensor, in real time obtain measured target
Image.
Target of the present utility model can be a specific pattern or the continuous power-up target for working on destination object.This
Device is less demanding to target, if using power-up LED or LD light bar as target, can realize 24 hours it is round-the-clock
The characteristics of working, and extract convenient high with the degree of accuracy with characteristic target, certainty of measurement is also accordingly improved.
The trigger signal that trigger control unit 3 is used for needed for providing remote displacement sensor, sensor does not work usually, only
Have when extraneous trigger signal arrives, displacement transducer is just started working, and reduces the pressure of data storage and data transfer.Far
Journey communication unit 4 couples with treatment memory cell 6, for the long-range transmission of view data.
Remote communication unit 4 can have for mobile radio network transport modules or optical cable etc. such as wireless GPRS system, 3G, 4G
Line Transmission system, transmits measurement result to the data processing centre 20 of distal end, meets long-range unattended round-the-clock open country
Outer job requirement.
The utility model is used for large structure vertical displacement or the specific measuring process of deformation parameter is as follows：
[1] install：Measurement target drone, benchmark parallel target, wherein hydrostatic level, hydrostatic level are installed on large structure
Measurement sedimentation probe and measurement target drone be fixed on side wall or the top of large structure, measurement target drone is arranged on point position to be measured
Put, benchmark parallel target is arranged on corresponding measurement sedimentation probe；
[2] measure：Open imaging system so that benchmark parallel target and measurement target drone are in the different positions of the sensitivity unit of imaging system
Imaging is put, hydrostatic level is opened, the height value of the measurement sedimentation probe where measuring basis target；
[3] calibrate：Data processing is carried out to imaging system, the shift value of benchmark parallel target and measurement target drone is obtained；To static(al)
Spirit level carries out data processing, is calculated the shift value of measurement sedimentation probe；And according to the shift value pair of measurement sedimentation probe
The shift value of measurement target drone is modified calibration, deducts the measurement error that imaging system is brought by itself installation foundation displacement, obtains
Obtain the real displacement value of measurement point where measurement target drone.
Calibration steps wherein in step [3] includes：
[3.1] the change in location value according to measurement target drone, and combine the distance between measurement target drone and imaging system, imaging
The optical parametric of system, is calculated the shift value x1 of measurement target drone；
[3.2] the change in location value according to benchmark parallel target, and combine the distance between benchmark parallel target and imaging system, imaging
The optical parametric of system, is calculated the shift value x0 of benchmark parallel target；
[3.3] according to benchmark sedimentation probe in hydrostatic level and the liquid level of measurement sedimentation probe, it is calculated survey
The shift value y0 of amount sedimentation probe；
[3.4] the displacement x 11=x1+y0-x0 of the measurement point where calibrated rear measurement target drone.
Its Computing Principle is as follows：
Assuming that shakiness synchronizing moving displacement z in imaging system gene basis in measurement process, because benchmark parallel target is provided in
On measurement sedimentation probe, then y0=x0+z (1) is indicated for basic target
For measurement target drone, its real shift value x11=x1+z (2)
Formula (1) and (2) simultaneous are calculated x11=x1+y0-x0；It is on the occasion of downward is negative that fetch bit is shifted in calculating
Value.
Thus overcome because imaging system is arranged on inside large structure, because own foundation problem produces displacement or deformation
Influence to measurement result.
The utility model is applied in bridge displacement detection, and the range of current measurable displacement is 10m grades, measurement
Precision reaches 0.1mm grades, and temporal resolution is 100ms.
Claims (8)
1. the self-calibration measurement apparatus of large structure vertical displacement or deformation are used for, it is characterised in that：Including several prisons
Unit and data processing centre (20) are surveyed, each monitoring unit includes imaging system (12), benchmark parallel target (14), hydrostatic level
Benchmark sedimentation probe (21) being connected including fluid-through tube with the measurement target drone (13) no less than, described hydrostatic level
With some measurements sedimentation probe (22), described measurement sedimentation probe (22) and measurement target drone (13) are fixed on large structure
(11) side wall or top, described benchmark parallel target (14) are arranged on corresponding measurement sedimentation probe (22), and benchmark parallel target
(14) it is imaged on the diverse location of the sensitivity unit of imaging system (12) with measurement target drone (13), data processing centre (20) obtains
After the measurement result of hydrostatic level and imaging system (12), and after carrying out calibration correction to the result of measurement target drone, surveyed
Measure displacement or the deformation parameter of point.
2. according to claim 1 for large structure vertical displacement or the self-calibration measurement apparatus of deformation, it is special
Levy and be：Described large structure (11) is tunnel, grotto, house, basement or bridge.
3. according to claim 1 for large structure vertical displacement or the self-calibration measurement apparatus of deformation, it is special
Levy and be：Benchmark sedimentation probe (21) of the hydrostatic level is arranged on the displacement of large structure outside or inside or deformation can
The stability region ignored.
4. according to claim 1 for large structure vertical displacement or the self-calibration measurement apparatus of deformation, it is special
Levy and be：Described benchmark parallel target (14) and measurement target drone (13) is pattern or the power-up target of continuous work.
5. according to claim 4 for large structure vertical displacement or the self-calibration measurement apparatus of deformation, it is special
Levy and be：Described power-up target is LED the or LD light bar for lining up definite shape.
6. according to claim 1 for large structure vertical displacement or the self-calibration measurement apparatus of deformation, it is special
Levy and be：Described hydrostatic level and imaging system pass through wireless GPRS system, mobile radio network transport module or optical cable
Transmission system transmits measurement result to data processing centre (20).
7. according to claim 1 for large structure vertical displacement or the self-calibration measurement apparatus of deformation, it is special
Levy and be：Described imaging system includes that optical lens (1), imageing sensor (2), core control function unit (5), treatment are deposited
Storage unit (6) and remote communication unit (4)；Described imageing sensor (2) is CCD or cmos sensor, described core control
Functional unit (5) processed includes trigger signal detection module, image data acquiring module, image gray processing and Zoom module and target
Characteristics of image lifts and identification module, for the treatment and identification of target image；Described treatment memory cell (6) and core control
Functional unit (5) processed is connected, for the storage and treatment of view data；Described remote communication unit (4) is single with treatment storage
First (6) connection, for the long-range transmission of view data.
8. according to claim 1 for large structure vertical displacement or the self-calibration measurement apparatus of deformation, it is special
Levy and be：Described imaging system (12) is CCD cameras or cmos sensor.
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| CN201620833764.3U CN206223095U (en) | 2016-08-03 | 2016-08-03 | For large structure vertical displacement or the self-calibration measurement apparatus of deformation |
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ID=58780855
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197288A (en) * | 2016-08-03 | 2016-12-07 | 西安敏文测控科技有限公司 | Self-calibration measurement apparatus and method for large structure vertical displacement or deformation |
| CN107255467A (en) * | 2017-06-30 | 2017-10-17 | 上海建工集团股份有限公司 | Linear automatic measurement system and method for concrete continuous girder bridge segmental construction |
-
2016
- 2016-08-03 CN CN201620833764.3U patent/CN206223095U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197288A (en) * | 2016-08-03 | 2016-12-07 | 西安敏文测控科技有限公司 | Self-calibration measurement apparatus and method for large structure vertical displacement or deformation |
| CN106197288B (en) * | 2016-08-03 | 2018-10-02 | 西安敏文测控科技有限公司 | Self-calibration measuring device and method for large structure vertical displacement or deformation |
| CN107255467A (en) * | 2017-06-30 | 2017-10-17 | 上海建工集团股份有限公司 | Linear automatic measurement system and method for concrete continuous girder bridge segmental construction |
| CN107255467B (en) * | 2017-06-30 | 2019-12-03 | 上海建工集团股份有限公司 | Linear automatic measurement system and method for concrete continuous girder bridge segmental construction |
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