CN106197288B - Self-calibration measuring device and method for large structure vertical displacement or deformation - Google Patents
Self-calibration measuring device and method for large structure vertical displacement or deformation Download PDFInfo
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- CN106197288B CN106197288B CN201610629370.0A CN201610629370A CN106197288B CN 106197288 B CN106197288 B CN 106197288B CN 201610629370 A CN201610629370 A CN 201610629370A CN 106197288 B CN106197288 B CN 106197288B
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
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Abstract
The invention discloses a kind of self-calibration measuring devices and method being used for large structure vertical displacement or deformation parameter,Including data processing centre,Imaging system,Benchmark parallel target,Hydrostatic level and no less than one measurement target drone,The hydrostatic level includes several sedimentation probes and fluid-through tube,The sedimentation probe and measurement target drone are fixed on side wall or the top of large structure,The benchmark parallel target is disposed therein certain and only settles on probe,And benchmark parallel target and measurement target drone are imaged on the different location of the sensitivity member of imaging system,After data processing centre obtains the measurement result of hydrostatic level and imaging system,It is popped one's head according to sedimentation,The measurement result of benchmark parallel target and measurement target drone,Displacement or the deformation parameter of measurement point is calculated,The present invention overcomes the displacements that measuring system is generated because imaging system is by the reasons such as load or the deformation of itself installation foundation,Eventually lead to the measurement error of system,Improve measurement accuracy.
Description
Technical field
The invention belongs to mechanical meaurement technical fields, are related to one kind and being used for large structure displacement and deformation measuring device,
The device and method of especially a kind of self-alignment long-range displacement or distortion measurement.
Background technology
Large structure includes bridge, dam, tunnel, slope and building construction etc., and deformation includes mainly static deformation
And dynamic deformation, static deformation refer to that ground sink, tilts and the very slow deformation of variations such as stress relaxation, dynamic deformation refer to by
Shortterm deflection caused by Yu Feng, temperature, earthquake, traffic load or site operation etc., parameter monitoring comment the safety of target
Estimate analysis to play an important role.
Traditional large structure such as bridge, the instrument of deformation detection have dial gauge, amesdial, accelerometer, spirit level,
Theodolite etc..Currently, these instruments are still widely used in bridge acceptance, periodic detection, but professional technician is needed,
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 measuring technique 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, the larger measurement for bridge large deformation of span cannot be met, 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 with image sensings such as CCD both at home and abroad
Device is medium, and image processing techniques is used for the research of bridge, beams of concrete deformation measurement.Application No. is 200820241096.0
Chinese patent " a kind of bridge moving displacement measuring device based on machine vision " disclose and a kind of passing through lasing light emitter and CCD is combined
The measuring device for measuring bridge dynamic deformation passes through the position of laser beam during bridge distal end records bridge deformation with CCD
Variation is set, the deformation parameter of bridge is calculated.Main problem is existing for current this kind of displacement sensor：Ccd image senses
Device needs are used in combination with alignment laser, increase the complexity of system.
Application No. is 201410145554.0 Chinese patents " a kind of Real-time Monitoring System of Bridges " to disclose a kind of bridge
Power-up target is held away from the fixation target of bridge by the remote measuring unit of dynamic displacement in use, and is needed in bridge
The place for monitoring displacement is equipped with CCD cameras so that target is imaged in the photosensitive members of CCD, passes through the target figure obtained in real time
As the position on CCD, the dynamic displacement on bridge tested point is calculated.This scheme the problem is that：When monitoring is
System is used in tunnel, in grotto etc. when occasions, since CCD cameras and measurement target drone can generate position with the influence of extraneous load
Shifting and deformation, and since the position of the two installation is different, the displacement of measurement target drone and CCD cameras caused by extraneous load is not
Together, cause measurement result larger error occur, affect measurement accuracy.
Invention content
The present invention proposes a kind of self-calibration measuring device and method for large structure vertical displacement or deformation,
For the self-calibration measuring device and method of large scale structure composition deformation or displacement parameter, increase on the basis of traditional measurement target
A benchmark parallel target and a hydrostatic level are added, and the benchmark parallel target is fixed on the sedimentation probe of hydrostatic level, by quiet
Power spirit level obtains the displacement absolute value of accurate benchmark parallel target, to be modified calibration to the positional value of measurement target drone, most
The precise displacement value of measurement point is obtained afterwards.
The technology contents of the present invention are as follows：
For the self-calibration measuring device of large structure vertical displacement or deformation, including data processing centre, imaging
System, benchmark parallel target, hydrostatic level and no less than one measurement target drone, the hydrostatic level include several sedimentations
Probe and fluid-through tube, the sedimentation probe and measurement target drone are fixed on side wall or the top of large structure, the benchmark
Target is disposed therein certain and only settles on probe, and benchmark parallel target and measurement target drone are in the different location of the sensitivity member 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 is calculated.
Above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, large structure is tunnel
Road, grotto, house or basement.
It is above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, the benchmark of hydrostatic level
The setting of sedimentation probe is in large structure external displacement or the insignificant region of deformation.
It is above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, benchmark parallel target and measurement target
It is designated as specific pattern or the power-up target of continuous work.
Above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, power-up target is to line up one
LED the or LD light bar of setting shape.
It is above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, hydrostatic level and imaging
System is transmitted measurement result to by wireless GPRS system, mobile radio network transmission module or optical cable transmission system at data
Reason center.
Above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, imaging system includes optics
Camera lens, imaging sensor, core control function unit, processing storage unit and remote communication unit；The imaging sensor
For CCD or cmos sensor, the core control function unit includes trigger signal detection module, image data acquiring mould
Block, image gray processing and Zoom module and target image feature extraction and identification module are used for the processing and identification of target image；
The processing storage unit is connected with core control function unit, is used for the storage and processing of image data；Described is long-range
Communication unit couples with processing storage unit, is used for the long-range transmission of image data.
It is above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, core control function unit
It is built by DSP.
Above-mentioned to be used in the self-calibration measuring device of large structure vertical displacement or deformation, imaging system is CCD pictures
Machine or cmos sensor.
For the self-calibration measurement method of large structure vertical displacement or deformation, include the following steps：
[1] it installs：Measurement target drone, benchmark parallel target, hydrostatic level, wherein 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 mounted on point to be measured
It sets, benchmark parallel target setting is on corresponding measurement sedimentation probe；
[2] it measures：Open imaging system so that benchmark parallel target and measurement target drone are in the different positions of the sensitivity member of imaging system
Imaging is set, hydrostatic level is opened, the height value of the measurement sedimentation probe where measuring basis target；
[3] it calibrates：Data processing is carried out to imaging system, obtains the shift value of benchmark parallel target and measurement target drone；To static(al)
Spirit level carries out data processing, and the shift value for measuring sedimentation probe is calculated；And according to the shift value pair for measuring 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
The real displacement value of measurement point where obtaining measurement target drone.
It is above-mentioned to be used in the self-calibration measurement method of large structure vertical displacement or deformation, the calibration step in rapid [3]
Suddenly include：
[3.1] according to the change in location value of measurement target drone, and the distance between measurement target drone and imaging system, imaging are combined
The shift value x1 of measurement target drone is calculated in the optical parameter of system；
[3.2] according to the change in location value of benchmark parallel target, and the distance between benchmark parallel target and imaging system, imaging are combined
The shift value x0 of benchmark parallel target is calculated in the optical parameter of system；
[3.3] according to the liquid level of benchmark sedimentation probe in hydrostatic level and measurement sedimentation probe, survey is calculated
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 present invention has are as follows：
1, the present invention increases one on the basis of the displacement measuring device that existing CCD cameras and measurement target drone form
Benchmark parallel target and hydrostatic level, and benchmark parallel target is arranged on a measurement sedimentation probe of hydrostatic level, by static(al)
Spirit level provides the absolute displacement values of measurement sedimentation probe；In installation and debugging so that benchmark parallel target and measurement target drone simultaneously at
Picture in data handling, the shift value of true measurement point is corrected according to the shift value of benchmark parallel target on CCD cameras,
To overcome the displacement that measuring system is generated because imaging system is by the reasons such as load or the deformation of itself installation foundation, improve
Measurement accuracy.
2, the hydrostatic level of the present invention includes the benchmark sedimentation probe and several measurement sedimentation spies that fluid-through tube is connected
Head, measures sedimentation probe and measurement target drone is fixed on side wall or the top of large structure, and benchmark parallel target is disposed therein certain only
It measures on sedimentation probe, benchmark sedimentation probe setting passes through base in large structure external displacement or the insignificant region of deformation
Relationship between quasi- sedimentation probe and measurement sedimentation probe, is calculated and measures the precise displacement that sedimentation is popped one's head in, while several
Multiple measurement points that sedimentation probe is distributed in measured tunnel are measured, is matched with several imaging systems, target, realizes tunnel
The distributed self-correcting locating tab assembly of road parameter.
3, core of the invention control function unit uses embedded system, compact-sized reliable, facilitates application；It sets simultaneously
It is equipped with telecommunication transmission unit, the result of measurement can be passed through wireless transmitting systems or the light such as gprs system, 3G wireless networks
The line transmission systems such as cable are transmitted to the duty room of distal end, meet long-range unattended round-the-clock field work requirement.
4,24 hours round-the-clock works may be implemented using LED the or LD light bar of power-up as target in target of the invention
Make, and have the characteristics that characteristic target extraction is convenient and accuracy is high, measurement accuracy also accordingly improves.
Description of the drawings
Fig. 1 is that self-calibration measuring device of the present invention monitors application principle schematic diagram in tunnel；
Fig. 2 is that measuring device measures 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 imaging system theory of constitution schematic diagram of the present invention；
Reference numeral is as follows：1-optical lens；2-imaging sensors；4-remote communication units；5-cores control work(
It can unit；6-processing storage units；11-large structures；12-imaging systems；13-measurement target drones；14-benchmark parallel targets；
16-measurement target drone images；17-benchmark parallel target images；18-display screens；20 --- data processing centre；21-benchmark are heavy
Drop probe；22-measure sedimentation probe；23-fluid-through tubes；24-deformation measurement regions；25-stability regions；
Specific implementation mode
The measuring system of the present invention is mainly used for the displacement of certain 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, the self-calibration measuring device of large structure vertical deformation or displacement parameter, packet are used for
Data processing centre 20, imaging system 12, benchmark parallel target 14, hydrostatic level and no less than one measurement target drone 13 are included, it is quiet
Power spirit level includes that the benchmark sedimentation probe 21 being connected by fluid-through tube 23 and several measure sedimentation probe 22.Data processing
The setting of the heart 20 is measuring distally, and imaging system 12 is mounted on the suitable position of large structure, measures 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 are imaged on the different location of the sensitivity member of imaging system 12, data processing centre
After the measurement result for obtaining hydrostatic level and imaging system, according to sedimentation probe, the measurement knot of benchmark parallel target and measurement target drone
Displacement or the deformation parameter of measurement point is calculated in fruit.
Since imaging system is fixed in measuring application on large structure, itself generates displacement and change also with basis
Shape leads to the inaccuracy of measurement result, in order to correct the error that imaging system itself is brought, present invention introduces benchmark parallel target,
And benchmark parallel target is fixed on a sedimentation probe of hydrostatic level, and base is obtained by the outcome measurement of hydrostatic level
The displacement parameter of quasi- target only needs to measure to obtain the relative displacement between benchmark parallel target and measurement target drone in this way, you can with
To the exact shift of measurement point, to itself calibrating to imaging system.
The operation principle of hydrostatic level is as shown in Figure 3 and Figure 4, and 1#, 2#, 3# and 4# probe, wherein 1# are given in figure
It pops one's head in as benchmark sedimentation probe 21, setting is arranged in large structure can in the displacement of large structure outside or inside or deformation
The stability region 25 ignored, and 2#, 3# and 4# probe as measure sedimentation probe 22 be then arranged top, the waist in tunnel etc. need to
The region to be measured, a measurement therein settles is fixed with benchmark parallel target 14 on probe.Imaging system 12 is by the base when measurement
Quasi- target and other measurement target drones in the region are imaged together, opposite between measurement target drone and benchmark parallel target to be calculated
Displacement.
Hydrostatic level is put down under initial static state by the fluid level of every measuring probe of fluid-through tube connection in Fig. 3
Together, i.e. H10=H20=H30=H40, when hydrostatic level is in 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, as the upper and lower position of measurement point rises and falls and liquid occur
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 that positive value indicates the measuring point Liquid storage container
Interior liquid level increases, and △ hi are that negative value indicates the reduction of the liquid level in the measuring point Liquid storage container.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 that positive value indicates the measuring point ground
It raises, △ Hi are that negative value indicates the measuring point settlement of foundation.If it is known that the horizontal distance L between two measuring points, then opposite between two measuring points
Inclined variation also obtains 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 the shift value for the benchmark parallel target being mounted on material sedimentation probe.
The imaging of measurement target drone 13 and benchmark parallel target 14 in the photosensitive members of CCD is as shown in figure 5,16,17 respectively survey in figure
Target image and benchmark parallel target image are measured, 18 be display screen.It is zero or displacement very little since 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 can make the image of measurement target drone 13 generate the displacement x 1 of upper and lower directions, form when load-carrying vehicle drives into bridge
As system CCD itself generate background displacement be exactly benchmark parallel target 14 displacement x O, it is deducted, accurate survey can be obtained
Amount point shift value.
As shown in Figure 6, imaging system includes optical lens 1, imaging sensor 2, core control function unit 5, handles and deposit
Storage unit 6 and remote communication unit 4；Imaging 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 extraction and identification mould
Block is used for the processing and identification of target image；Processing storage unit 6 is connected with core control function unit 5, is used for image data
Storage and processing；Remote communication unit 4 couples with processing storage unit 6, is used for the long-range transmission of image data.
Optical lens 1 aims at the target that is arranged in measured target, in the application the camera lens of optional varifocal, by difference away from
From on, different size of target imaging to imaging sensor, this working method has good adaptability to measuring target, and
Have the characteristics that measurement range is big, wherein imaging sensor 2 is CCD or cmos sensor, for obtaining measured target in real time
Image.
The target of the present invention can be the power-up target of the specific pattern or continuous work on target object.The present apparatus
It is of less demanding to target, if 24 hours round-the-clock works may be implemented as target using LED the or LD light bar of power-up
Make, and have the characteristics that characteristic target extraction is convenient and accuracy is high, measurement accuracy also accordingly improves.
Trigger control unit is used to provide the trigger signal needed for remote displacement sensor, and sensor does not work usually, only
Have when extraneous trigger signal arrives, displacement sensor is just started to work, and the pressure of data storage and data transmission is reduced.Far
Journey communication unit 4 couples with processing storage unit 6, is used for the long-range transmission of image data.
Remote communication unit 4, which can be the mobile radio networks transmission module or optical cable etc. such as wireless GPRS system, 3G, 4G, to be had
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 present invention is as follows for large structure vertical displacement or the specific measuring process of deformation parameter：
[1] it installs：Measurement target drone, benchmark parallel target, hydrostatic level, wherein 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 mounted on point to be measured
It sets, benchmark parallel target setting is on corresponding measurement sedimentation probe；
[2] it measures：Open imaging system so that benchmark parallel target and measurement target drone are in the different positions of the sensitivity member of imaging system
Imaging is set, hydrostatic level is opened, the height value of the measurement sedimentation probe where measuring basis target；
[3] it calibrates：Data processing is carried out to imaging system, obtains the shift value of benchmark parallel target and measurement target drone；To static(al)
Spirit level carries out data processing, and the shift value for measuring sedimentation probe is calculated；And according to the shift value pair for measuring 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
The real displacement value of measurement point where obtaining measurement target drone.
Calibration steps wherein in step [3] includes：
[3.1] according to the change in location value of measurement target drone, and the distance between measurement target drone and imaging system, imaging are combined
The shift value x1 of measurement target drone is calculated in the optical parameter of system；
[3.2] according to the change in location value of benchmark parallel target, and the distance between benchmark parallel target and imaging system, imaging are combined
The shift value x0 of benchmark parallel target is calculated in the optical parameter of system；
[3.3] according to the liquid level of benchmark sedimentation probe in hydrostatic level and measurement sedimentation probe, survey is calculated
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, since benchmark parallel target is provided in
It measures on sedimentation probe, then y0=x0+z (1) is indicated for basic target
For measurement target drone, true shift value x11=x1+z (2)
X11=x1+y0-x0 is calculated in formula (1) and (2) simultaneous；It is positive value that fetch bit, which is shifted to, in calculating, is downwards negative
Value.
Thus it overcomes because imaging system is mounted on inside large structure, because own foundation problem generates displacement or deformation
Influence to measurement result.
The present invention is applied in bridge displacement detection, and the range of measurable displacement is 10m grades at present, measurement accuracy
Up to 0.1mm grades, temporal resolution 100ms.
Claims (10)
1. the self-calibration measuring device for large structure vertical displacement or deformation, it is characterised in that：Including several prisons
It includes imaging system (12), benchmark parallel target (14), hydrostatic level to survey unit and data processing centre (20), each monitoring unit
No less than one measurement target drone (13), the hydrostatic level include the benchmark sedimentation probe (21) that fluid-through tube is connected
Sedimentation probe (22) is measured with several, measurement sedimentation probe (22) and measurement target drone (13) are fixed on large structure
(11) side wall or top, the benchmark parallel target (14) setting is settled in corresponding measurement on probe (22), and benchmark parallel target
(14) it is imaged on the different location of the sensitivity member 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 to the result of measurement target drone carry out calibration correction after, surveyed
Measure displacement or the deformation parameter of point.
2. the self-calibration measuring device according to claim 1 for large structure vertical displacement or deformation, special
Sign is：The large structure (11) is tunnel, grotto, house, basement or bridge.
3. the self-calibration measuring device according to claim 1 for large structure vertical displacement or deformation, special
Sign is：Benchmark sedimentation probe (21) setting of the hydrostatic level can in the displacement of large structure outside or inside or deformation
The stability region ignored.
4. the self-calibration measuring device according to claim 1 for large structure vertical displacement or deformation, special
Sign is：The benchmark parallel target (14) and measurement target drone (13) is specific pattern or the power-up target of continuous work.
5. the self-calibration measuring device according to claim 4 for large structure vertical displacement or deformation, special
Sign is：The power-up target is LED the or LD light bar for lining up definite shape.
6. the self-calibration measuring device according to claim 1 for large structure vertical displacement or deformation, special
Sign is：The hydrostatic level and imaging system passes through wireless GPRS system, mobile radio network transmission module or optical cable
Transmission system transmits measurement result to data processing centre (20).
7. the self-calibration measuring device according to claim 1 for large structure vertical displacement or deformation, special
Sign is：The imaging system includes optical lens (1), imaging sensor (2), core control function unit (5), handles and deposit
Storage unit (6) and remote communication unit (4)；The imaging sensor (2) is CCD or cmos sensor, the core control
Functional unit (5) processed includes trigger signal detection module, image data acquiring module, image gray processing and Zoom module and target
Image characteristics extraction and identification module are used for the processing and identification of target image；The processing storage unit (6) and core control
Functional unit (5) processed is connected, and is used for the storage and processing of image data；The remote communication unit (4) and processing storage are single
First (6) connection, is used for the long-range transmission of image data.
8. the self-calibration measuring device according to claim 1 for large structure vertical displacement or deformation, special
Sign is：The imaging system (12) is CCD cameras or cmos sensor.
9. the self-calibration measurement method for large structure vertical displacement or deformation, which is characterized in that include the following steps：
[1] it installs：Measurement target drone, benchmark parallel target, hydrostatic level, the wherein survey of hydrostatic level are installed on large structure
Amount sedimentation probe and measurement target drone are fixed on side wall or the top of large structure, and measurement target drone is mounted on to be measured position,
Benchmark parallel target setting is on corresponding measurement sedimentation probe；
[2] it measures：Open imaging system so that benchmark parallel target and measurement target drone are on the different location of the sensitivity member of imaging system
Hydrostatic level is opened in imaging, the height value of the measurement sedimentation probe where measuring basis target；
[3] it calibrates：Data processing is carried out to imaging system, obtains the shift value of benchmark parallel target and measurement target drone；To static level
Instrument carries out data processing, and the shift value for measuring sedimentation probe is calculated；And according to the shift value of measurement sedimentation probe to measuring
The shift value of target is modified calibration, deducts the measurement error that imaging system is brought by itself installation foundation displacement, is surveyed
The real displacement value of measurement point where measuring target.
10. the self-calibration measurement method according to claim 9 for large structure vertical displacement or deformation, special
Sign is that the calibration steps in the step [3] includes：
[3.1] according to the change in location value of measurement target drone, and the distance between measurement target drone and imaging system, imaging system are combined
Optical parameter, the shift value x1 of measurement target drone is calculated；
[3.2] according to the change in location value of benchmark parallel target, and the distance between benchmark parallel target and imaging system, imaging system are combined
Optical parameter, the shift value x0 of benchmark parallel target is calculated；
[3.3] according to the liquid level of benchmark sedimentation probe in hydrostatic level and measurement sedimentation probe, it is heavy that measurement is calculated
The shift value y0 of probe drops；
[3.4] the displacement x 11=x1+y0-x0 of the measurement point where calibrated rear measurement target drone.
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