CN109632103A - High vacant building Temperature Distribution and surface crack remote supervision system and monitoring method - Google Patents
High vacant building Temperature Distribution and surface crack remote supervision system and monitoring method Download PDFInfo
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Abstract
High vacant building Temperature Distribution and surface crack remote supervision system and monitoring method, the tripod including supporting rotary head, data deconcentrator, slidably bracket, carrying image acquisition device and digital temperature sampler on rotary head；Laser range finder is used for the distance between precise measurement measured surface and observation point；Two kinds of camera lens tail portions are all connected with digital camera to observe, and short-focus lens are used for inspection high-altitude building surface, determine defect area, then be equipped with digital camera with telephoto lens and take pictures；Image procossing acquisition fracture length and width are carried out by sending data to computer；The method for obtaining building surface single point temperature value and carrying out surface temperature field reconstruction is progressively scanned by region, finally obtains the distribution situations of cracks and two-dimensional temperature field of building surface；High-altitude building surface reconstruction of temperature field and surface crack monitoring can be achieved at the same time, effectively raise the safety and efficiency of the detection of high-altitude building surface.
Description
Technical field
The invention belongs to high vacant building Temperature Distributions and surface crack monitoring technical field, in particular to vacant building temperature
Degree distribution and surface crack remote supervision system and detection method.
Background technique
During building engineering construction and operation maintenance, concrete surface crack is the most common disease, and reduction is built
Object usability and durability are built, is produced serious influence to its structural body safety.High-altitude building surface is detected, tradition
Contact Crack Detection low efficiency, it is at high cost, also there are some potential safety problemss by operating personnel.
High-altitude building surface is due to the difference by inside and outside all kinds of factors and structural body itself, so that inside and outside heat transfer rate
It is different, if building masonry wall surface, there are crack, cavity, metope bulk temperature is unevenly distributed, temperature near crack area
Difference will become more apparent.Traditional infrared thermal imaging system temperature-measuring range is excessively wide in range, and error is big, and it is accurate to carry out to fixed point position
Thermometric.
It is badly in need of a kind of contactless crack measuring device at a distance in current practical implementation, reduces testing cost,
Working efficiency is improved, and on this basis, realizes the measurement of structural body surface each point temperature, establish temperature field, can be building
The defect analysis on surface provides foundation, therefore the high vacant building Temperature Distribution of the invention patent and surface crack remote monitoring method
And system is able to solve this problem, and automation degree of equipment is high, and it is intelligentized to construction account to meet modern project detection
It is required that.
Summary of the invention
To overcome above-mentioned the deficiencies in the prior art, it is an object of that present invention to provide high vacant building Temperature Distributions splits with surface
Remote supervision system and monitoring method are stitched, can be achieved at the same time high-altitude building surface reconstruction of temperature field and remote surface crack
Monitoring effectively raises the safety and efficiency of the detection of high-altitude building surface.
To achieve the above object, The technical solution adopted by the invention is as follows:
High vacant building Temperature Distribution and surface crack remote supervision system include A-frame, A-frame support
Two Dimensional Rotating holder；Equipped with slidably bracket on Two Dimensional Rotating holder；On slidably bracket dispose image collecting device and
Digital temperature acquisition device；Image collecting device and digital temperature sampler pass through data line respectively and are connected with data deconcentrator；Number
It is connect according to deconcentrator with computer；
The image collecting device includes telephoto lens, short-focus lens, digital camera and laser range finder；
The digital temperature acquisition device includes Remote Non-touch high-precision infrared temperature probe and laser sight；
The computer is mounted with monitoring software, and monitoring software includes cradle head control module, Crack Detection module, surface
Reconstruction of temperature field module；
Computer software end cradle head control module controls Two Dimensional Rotating holder carrying image for sending control instruction
Acquisition device is observed, and carries out rotation or pause both horizontally and vertically according to tested building orientation；The surface
Reconstruction of temperature field module, first progress temperature adjustmemt, are established using regional temperature value combination spline method limited after amendment
Building surface two-dimensional temperature field.
The tail end of the telephoto lens, short-focus lens is all connected with digital camera, and short-focus lens tail end connects digital camera
For inspection, defect area is determined；Telephoto lens tail end connection digital camera takes pictures to defect area, passes through serial data
Acquired image is transmitted to computer terminal by line；The laser range finder is mounted on the coaxial outside of telephoto lens, for surveying
Discharge observation point is at a distance from tested blemish surface；The data deconcentrator is used for expanding USB interface, improves transmission speed.
The digital camera obtains focal length, the radial distortion, tangential distortion parameter of camera, utilization is abnormal by chessboard calibration
Variable element carries out distortion correction to the building surface image of shooting.
The digital temperature acquisition device is directed at position to be measured by laser aiming mode, and then utilizes Remote Non-touch
High-precision infrared temperature probe obtains the temperature value of building surface each point, is passed collected temperature data by data line
Transport to computer terminal.
The laser sight improves accuracy of measurement for aiming at building surface tested point；It is described long-range non-to connect
Touch high-precision infrared temperature probe is used to obtain the single point temperature value of building surface.
The Two Dimensional Rotating holder uses high-precision servo motor rotary head, and high-precision servo motor rotary head exists
The vertically rotation and positioning in (pitching) space and level (revolution) space, orientation angle in the vertical direction and the horizontal direction
Resolution ratio is 0.01 °, and repetitive positioning accuracy is 0.1 °, and vertical direction angle range is -60 °~70 °, horizontal direction angle model
Enclose is 0 °~300 °；The slidably bracket can laterally adjust the position of installation.
The Remote Non-touch high-precision infrared temperature probe, according to cement and concrete temperature range and transmitting
Rate is -10~150 DEG C according to temperature transducer, temperature-measuring range is chosen as parameter, and resolution ratio is 1 DEG C, distance coefficient 300:1,
Operating ambient temperature is -15~70 DEG C, and emissivity is 0.95 (fixation), and spectral region is 8~4um.
The Crack Detection module includes image pre-processing module, image mosaic, fracture profile extraction module, crack again
Parameter calculating module；
Image pre-processing module carries out distortion correction to the building surface image of shooting, and image enhancement removes movement mould
Paste, to restore the detailed information in crack and improve visual quality of images；
Image mosaic module carries out splicing to the surface image of pretreated each region and obtains whole building surface
Large scale complete image；
Fracture profile extraction module, is combined using morphology and region growing, and crack refines and connect, and is obtained complete
Crack strip extraction skeleton；
Fracture parameter calculation module, the actual physics length and width in combining camera parameter measurement building surface crack.
High vacant building Temperature Distribution and surface crack remote monitoring method, comprising the following steps:
Step 1, suitable observation point is chosen, A-frame is fixed, A-frame is adjusted to level；Rotary head is led to
The level meter crossing holder base installing hole to be mounted on tripod, and being carried by rotary head, is adjusted to level for rotary head；
Step 2, it will slidably bracket be mounted on holder top plate by top plate fixation hole, by image collecting device and number
Temperature sampler is placed on slidably bracket, and the digital camera one of telephoto lens tail end connection and telephoto lens outside are coaxial
Laser range finder passes through data line and connect with data deconcentrator, unified to connect computer；
Step 3, short-focus lens are used for inspection in image collecting device, determine defect area；Telephoto lens is used again, passes through rotation
Turn focusing ring adjustment lens focus shooting and obtains rift defect image；By data line by image transmitting to computer；
Digital temperature acquisition device is mounted on the coaxial outside of short-focus lens, using the Remote Non-touch of laser aiming mode
High-precision infrared temperature probe obtains building according to laser transmitting facula position on short-focus lens image picture
The temperature value of object surface each point；Temperature data is transmitted to computer by data line；
Step 4, computer handles the rift defect image and temperature data of acquisition, and specific process flow includes again
Following steps:
1), digital camera is demarcated, and is demarcated using Matlab camera calibration tool box, and digital camera one, digital camera are obtained
Two camera inside and outside parameter and distortion factor；
2), image collecting device will by collected building surface each region image data, digital temperature acquisition device
Collected building surface each region temperature data reaches in computer；
3), image pre-processing module carries out school to the building surface image of acquisition by the distortion parameter that calibration obtains
Just, interference in air flow causes wavefront distortion to seriously affect long-range image quality, with image enhancement, estimation fuzzy core, removes movement mould
Paste, obtains clear image；
4), image mosaic module, the clear image for building surface each region after pretreatment, using based on SIFT
The panoramic mosaic method for registering images of feature carries out positioning feature point using SIFT algorithm, by seeking the spy in the image of crack
Sign point and its description in relation to Scale and Orientation obtain feature and carry out image characteristic point Rapid matching, rough to spell
Each area image is connect, then splicing gap is eliminated using PCA changing image blending algorithm, obtains large scale and smoothly completely build
Object surface image；
5), fracture profile extraction module obtains complete building surface figure by the non-differential edge detection operator of Canny
As the marginal information in crack, mentioning for complete crack striped is realized using morphologic algebraic operation and algorithm of region growing
It takes, the crack wheel of single pixel wide then is obtained to complete crack strip extraction skeleton with Rosenfeld thinning algorithm
It is wide；
6), fracture parameter calculation module calculates fracture length, takes the half of fracture profile sum of all pixels m as picture
The physical length in crack is roughly calculated out using pixel equivalent w for fracture length under plain coordinate system,Wherein L is to split
Actual physics length is stitched, m is fracture profile sum of all pixels, and w is pixel equivalent；Fracture width is calculated, fracture profile skeleton is utilized
Vertical line intersection method on optional crack skeleton a little makees vertical line, hands over edge of crack in two o'clock P (x1,y1)、H(x2,y2), calculate two
Geometric distance between intersection pointIt is counted with this, chooses the crack as the crack of D maximum value
The developed width in crack is roughly calculated out using pixel equivalent for width, and W=Dw, wherein W is crack actual physics length, and D is
Fracture width under the pixel coordinate system of crack, w are pixel equivalent；
7) infrared measurement of temperature model is established according to the emissivity and Gaseous attenuation that are tested building surface, in different-waveband
Interior ir radiant power is directly proportional to the r power of dut temperature, obtains temperature adjustmemt fitting formulaWherein T is true temperature after amendment, ToTemperature, T are measured for infrared sensoreFor week
Environment temperature is enclosed, α is tested building surface material emissivity, and τ (x) is for service band apart from infrared measurement of temperature in 8~14um
Atmospheric transmissivity at sensor x；
8), the collected building surface single point temperature number of infrared temperature probe is corrected using temperature adjustmemt fitting formula
According to obtaining the corresponding actual temperature value of building surface each point；
9) more accurate temperature field, is established using revised finite region temperature value, is built using spline method
Build object surface two-dimensional temperature field.
Compared with prior art, the beneficial effects of the present invention are:
High vacant building Temperature Distribution of the present invention and surface crack remote monitoring method and system are closed by setting
Suitable erection point and corresponding observation scanning area, wait scanning survey to finish.It is taken by high-precision servo motor rotary head
It carries image collecting device and digital temperature sampler completes the acquisition of building surface image and temperature data.Utilize serial data
Acquired image and data are transmitted to computer by line, are divided by computer software end fracture image and temperature data
Analysis and calculating, are accurately obtained building surface distribution situations of cracks and two-dimensional temperature field, relative to traditional artificial detection side
Method, high degree of automation of the present invention, safety coefficient is high, the effective standard for improving the measurement of Remote Non-touch building surface crack
Exactness and efficiency.It can be realized remote collection high-altitude building surface image and temperature data, and obtain its fractue spacing simultaneously
Situation and temperature field.
Detailed description of the invention
Fig. 1 is the schematic diagram of present system.
Fig. 2 is the structural schematic diagram of image collecting device and digital temperature sampler part of the invention.
Fig. 3 is Crack Detection module workflow of the present invention.
In figure: 1- laser range finder, 2- telephoto lens, 3- focusing ring, 4- industrial camera C converting interface one, 5- digital camera
One, 6- short-focus lens, 7- laser sight, 8- infrared temperature probe, 9- industrial camera C converting interface two, 10- digital camera
Slidably bracket, 12- data deconcentrator, 13- computer, 14- holder top plate, 15- fixing bolt mouth, 16- top plate are solid by two, 11-
Determine hole, 17- Two Dimensional Rotating holder, 18- holder base installing hole, 19- holder pedestal, 20- fixing bolt nail.
Specific embodiment
The invention patent is described in further detail with reference to the accompanying drawing.
Referring to fig. 2, Fig. 3, a kind of high vacant building Temperature Distribution and surface crack remote supervision system, including watch in high precision
Motor-driven rotary head 17 is taken, the tripod of rotary head is used to support, slidably bracket 11 is built in rotary head 17
On, image collecting device and digital temperature sampler are placed on slidably bracket, rotary head, image collecting device, number
Temperature sampler passes through serial port data line and is connected to data deconcentrator 12, unified to connect with computer 13；The rotation cloud
Platform uses Two Dimensional Rotating holder.17 bottom of rotary head is equipped with holder base installing hole 18；It is holder top at the top of rotary head 17
Plate 14, holder top plate 14 are equipped with top plate fixation hole 16；
The image collecting device includes telephoto lens 2, short-focus lens 6, digital camera 5 and laser range finder 1；Laser
Rangefinder 1 is fixed in telephoto lens 2；2 front of telephoto lens is equipped with focusing ring 3；
The digital temperature acquisition device includes Remote Non-touch high-precision infrared temperature probe 8, laser sight
7。
The computer is mounted with monitoring software, and monitoring software includes cradle head control module, Crack Detection module, surface
Reconstruction of temperature field module；
On the basis of above scheme, the telephoto lens 2,6 tail end of short-focus lens pass through industrial camera C transit respectively
One 4, industrial camera C transit 29 connects digital camera 1, digital camera 2 10；6 tail end of short-focus lens connects digital camera 10
For inspection, determine that defect area, 2 tail end of telephoto lens connection one 5 pairs of defect areas of digital camera are taken pictures, acquisition figure
Picture；
The telephoto lens has adjustable focus, adjusts lens focus by rotation focusing ring 3, the object to be shot is made to exist
Blur-free imaging on camera.
The laser range finder 1 is for measuring observation point at a distance from defect gap observation area；
The data deconcentrator 12 is used for expanding USB interface, by data line connect computer terminal and image collecting device,
Digital temperature acquisition device, rotary head 17, laser range finder 1；
On the basis of above scheme, the determining in the vertical direction and the horizontal direction of high-precision servo motor rotary head 17
Position angular resolution is 0.01 °, and repetitive positioning accuracy is 0.1 °, and vertical direction angle range is -60~70, horizontal direction angle
Spending range is 0 °~300 °；
On the basis of above scheme, non-contact type high-precision infrared temperature probe temperature-measuring range is -10~150 DEG C,
Resolution ratio is 1 DEG C, distance coefficient 300:1, and operating ambient temperature is -15~70 DEG C, and emissivity is 0.95 (fixation), spectral region
For 8~14um.
On the basis of above scheme, the cradle head control module at computer software end is for being arranged measured zone parameter, cloud
Platform rotates angle, sends the rotation of instruction control rotary head in the horizontal and vertical directions by cradle head control module；
The calibration of the digital camera one, digital camera two obtains the focal length of camera with chessboard calibration method, radial abnormal
Become, tangential distortion parameter, completes the calibration of digital camera inside and outside parameter；
Pixel equivalent is obtained according to camera imaging principle and camera parameterWherein w is object representated by unit pixel
It manages size (pixel equivalent), A, B are building surface two fixing points, and h is building surface A, the object in kind between two fixed point of B
Size is managed, n is A under the lower one 5 imaging pixel coordinate system of digital camera of telephoto lens 2, the number of pixels between B two o'clock；
Using laser sight, each tested point of building surface is accurately positioned；
Remote Non-touch high-precision infrared temperature probe is used to obtain the temperature value of building surface each point.
General embodiment of the invention is as follows:
Referring to Fig. 3, high vacant building Temperature Distribution and surface crack remote monitoring method, comprising the following steps:
Step 1, suitable observation point is chosen, determines respective scan area；A-frame is fixed, A-frame is adjusted to
It is horizontal；The level that rotary head 17 is mounted on tripod by holder base installing hole 18, and is carried by rotary head
Rotary head is adjusted to level by instrument；
Step 2, it will slidably bracket 11 be mounted on holder top plate 14 by top plate fixation hole 16, by image collecting device
It is placed on slidably bracket 11 with digital temperature sampler, the digital camera 1 and telephoto lens of the connection of 2 tail end of telephoto lens
The coaxial laser range finder 1 in 2 outsides is connect by data line with data deconcentrator 12, unified to connect computer 13；
Step 3, short-focus lens 6 are used for inspection in image collecting device, determine defect area；Telephoto lens is used again, is passed through
It rotates focusing ring 3 and adjusts lens focus shooting acquisition rift defect image；By data line by image transmitting to computer 13；
Digital temperature acquisition device is mounted on the coaxial outside of short-focus lens 6, using the long-range non-contact of laser aiming mode
Formula high-precision infrared temperature probe 8 is obtained according to laser transmitting facula position on 6 image picture of short-focus lens
The temperature value of building surface each point；Temperature data is transmitted to computer 13 by data line；
In the high vacant building Temperature Distribution and surface defect remote supervision system, 6 inspection of short-focus lens simultaneously,
It is mounted on the temperature acquisition of the completion of infrared temperature probe 8 to building surface in coaxial outside；
Slidably bracket 11 follows closely 20 lateral adjustments image collecting devices by side fixing bolt mouth 15 and fixing bolt
Installation site；
Step 4,13 pairs of the computer rift defect images acquired and temperature data are handled, and specific process flow is wrapped again
Include following steps:
1), the calibration of digital camera one, digital camera two is demarcated using Matlab camera calibration tool box, obtains number
Camera one, the camera inside and outside parameter of digital camera two and distortion factor；
2), image collecting device will by collected building surface each region image data, digital temperature acquisition device
Collected building surface each region temperature data reaches in computer 13；
3), image pre-processing module carries out school to the building surface image of acquisition by the distortion parameter that calibration obtains
Just, interference in air flow causes wavefront distortion to seriously affect long-range image quality, with image enhancement, estimation fuzzy core, removes movement mould
Paste, obtains clear image；
4), image mosaic module, the clear image for building surface each region after pretreatment, using based on SIFT
The panoramic mosaic method for registering images of feature carries out positioning feature point using SIFT algorithm, by seeking the spy in the image of crack
Sign point and its description in relation to Scale and Orientation (LDB) obtain feature and carry out image characteristic point Rapid matching,
Splice each area image roughly, then eliminates splicing gap using PCA changing image blending algorithm, it is smoothly complete to obtain large scale
Building surface image；
5), fracture profile extraction module obtains complete building surface figure by the non-differential edge detection operator of Canny
As the marginal information in crack, mentioning for complete crack striped is realized using morphologic algebraic operation and algorithm of region growing
It takes, the crack wheel of single pixel wide then is obtained to complete crack strip extraction skeleton with Rosenfeld thinning algorithm
It is wide；
6), fracture parameter calculation module calculates fracture length, takes the half of fracture profile sum of all pixels m as picture
The physical length in crack is roughly calculated out using pixel equivalent w for fracture length under plain coordinate system,Wherein L is to split
Actual physics length is stitched, m is fracture profile sum of all pixels, and w is pixel equivalent；Fracture width is calculated, fracture profile skeleton is utilized
Vertical line intersection method on optional crack skeleton a little makees vertical line, hands over edge of crack in two o'clock P (x1,y1)、H(x2,y2), calculate two
Geometric distance between intersection pointIt is counted with this, chooses the crack as the crack of D maximum value
The developed width in crack is roughly calculated out using pixel equivalent for width, and W=Dw, wherein W is crack actual physics length, and D is
Fracture width under image coordinate system, w are pixel equivalent；
7) infrared measurement of temperature model is established according to the emissivity and Gaseous attenuation that are tested building surface, in different-waveband
Interior ir radiant power is directly proportional to the r power of dut temperature, obtains temperature adjustmemt fitting formulaWherein T is true temperature after amendment, ToTemperature, T are measured for infrared sensoreFor week
Environment temperature is enclosed, α is tested building surface material emissivity, and τ (x) is for service band apart from infrared measurement of temperature in 8~14um
Atmospheric transmissivity at sensor x；
8), the collected building surface single point temperature number of infrared temperature probe is corrected using temperature adjustmemt fitting formula
According to obtaining the corresponding actual temperature value of building surface each point；
Step 9) establishes more accurate temperature field using revised finite region temperature value, using spline method weight
Build building surface two-dimensional temperature field.
High vacant building Temperature Distribution of the present invention and surface crack remote monitoring method and system are closed by setting
Suitable erection point and corresponding observation scanning area, wait scanning survey to finish.It is taken by high-precision servo motor rotary head
It carries image collecting device and digital temperature sampler completes the acquisition of building surface image and temperature data；It will using data line
Acquired image and data are transmitted to computer, by computer software end fracture image and temperature data carry out analysis with
It calculates, is accurately obtained building surface distribution situations of cracks and two-dimensional temperature field.
Claims (10)
1. high vacant building Temperature Distribution and surface crack remote supervision system, which is characterized in that include A-frame, triangle
Bracket supports Two Dimensional Rotating holder；Slidably bracket has been built on Two Dimensional Rotating holder；Slidably bracket is equipped with Image Acquisition
Device and digital temperature sampler；Image collecting device and digital temperature sampler pass through data line and data deconcentrator phase respectively
Even；Data deconcentrator is connect with computer；
The image collecting device includes telephoto lens, short-focus lens, digital camera and laser range finder；
The digital temperature acquisition device includes Remote Non-touch high-precision infrared temperature probe, laser sight；
The computer is mounted with monitoring software, and monitoring software includes cradle head control module, Crack Detection module, surface temperature
Field rebuilds module.
2. high vacant building Temperature Distribution according to claim 1 and surface crack remote supervision system, which is characterized in that
Computer software end cradle head control module controls Two Dimensional Rotating holder carrying image acquisition device for sending control instruction
It is observed, rotation or pause both horizontally and vertically is carried out according to tested building orientation；The surface temperature field weight
Block is modeled, first progress temperature adjustmemt, establishes building table using regional temperature value combination spline method limited after amendment
Face two-dimensional temperature field.
3. high vacant building Temperature Distribution according to claim 1 and surface crack remote supervision system, which is characterized in that
The tail end of the telephoto lens, short-focus lens is all connected with digital camera, and short-focus lens tail end connects digital camera and is used for inspection,
Determine defect area；Telephoto lens tail end connection digital camera takes pictures to defect area, will be acquired by serial port data line
The image transmitting arrived is to computer terminal；The laser range finder is mounted on the coaxial outside of telephoto lens, for measuring observation point
At a distance from tested blemish surface.
4. high vacant building Temperature Distribution according to claim 1 and surface crack remote supervision system, which is characterized in that
The digital camera obtains focal length, the radial distortion, tangential distortion parameter of camera, utilizes distortion parameter pair by chessboard calibration
The building surface image of shooting carries out distortion correction.
5. high vacant building Temperature Distribution according to claim 1 and surface crack remote monitoring method and system, special
Sign is that the digital temperature acquisition device is directed at position to be measured by laser aiming mode, and then high using Remote Non-touch
Precision infrared temperature probe obtains the temperature value of building surface each point, is transmitted collected temperature data by data line
To computer terminal.
6. high vacant building Temperature Distribution according to claim 1 and surface crack remote supervision system, which is characterized in that
The laser sight improves accuracy of measurement for aiming at building surface tested point；The Remote Non-touch is high-precision
Degree infrared temperature probe is used to obtain the single point temperature value of building surface.
7. high vacant building Temperature Distribution according to claim 1 and surface crack remote supervision system, which is characterized in that
The rotary head uses high-precision servo motor driven, and high-precision servo motor driven rotary head is in vertical space and water
Rotation and positioning in out of the void, orientation angle resolution ratio in the vertical direction and the horizontal direction is 0.01 °, resetting
Precision is 0.1 °, and vertical direction angle range is -60 °~70 °, and horizontal direction angle range is 0 °~300 °；It is described slidably
Bracket can laterally adjust the position of installation.
8. high vacant building Temperature Distribution according to claim 1 and surface crack remote supervision system, which is characterized in that
The Remote Non-touch high-precision infrared temperature probe, according to cement and concrete temperature range and emissivity as ginseng
Number is -10~150 DEG C according to temperature transducer, temperature-measuring range is chosen, and resolution ratio is 1 DEG C, distance coefficient 300:1, working environment
Temperature is -15~70 DEG C, emissivity 0.95, and spectral region is 8~4um.
9. high vacant building Temperature Distribution according to claim 1 and surface crack remote supervision system, which is characterized in that
The Crack Detection module includes image pre-processing module, image mosaic, fracture profile extraction module, fracture parameter calculation again
Module；
Image pre-processing module carries out distortion correction to the building surface image of shooting, and image enhancement removes motion blur, with
It restores the detailed information in crack and improves visual quality of images；
Image mosaic module carries out splicing to the surface image of pretreated each region and obtains the big ruler in whole building surface
Spend complete image；
Fracture profile extraction module, is combined using morphology and region growing, and crack refines and connect, and obtains complete crack
Strip extraction skeleton；
Fracture parameter calculation module, the actual physics length and width in combining camera parameter measurement building surface crack.
10. high vacant building Temperature Distribution and surface crack remote monitoring method, which comprises the following steps:
Step 1, suitable observation point is chosen, A-frame is fixed, A-frame is adjusted to level；Rotary head (17) are logical
The level meter crossing holder base installing hole (18) to be mounted on tripod, and being carried by rotary head, rotary head is adjusted to
It is horizontal；
Step 2, it will slidably bracket (11) be mounted on holder top plate (14) by top plate fixation hole (16), by image collector
Set and digital temperature sampler be placed on slidably bracket (11), the digital camera one (5) of telephoto lens (2) tail end connection with
Coaxial laser range finder (1) is connect by data line with data deconcentrator (12) on the outside of telephoto lens (2), unified connection meter
Calculation machine (13)；
3), short-focus lens (6) are used for inspection in image collecting device, determine defect area；Telephoto lens is used again, is adjusted by rotation
Jiao Huan (3) adjusts lens focus shooting and obtains rift defect image；By data line by image transmitting to computer (13)；
Digital temperature acquisition device is mounted on the coaxial outside of short-focus lens (6), using the Remote Non-touch of laser aiming mode
High-precision infrared temperature probe (8) is obtained according to laser transmitting facula position on short-focus lens (6) image picture
Take the temperature value of building surface each point；Temperature data is transmitted to computer (13) by data line；
Step 4, computer (13) handles the rift defect image and temperature data of acquisition, and specific process flow includes again
Following steps:
1), digital camera is demarcated, and is demarcated using Matlab camera calibration tool box, and digital camera one and digital camera two are obtained
Camera inside and outside parameter and distortion factor；
2), image collecting device will acquire collected building surface each region image data, digital temperature acquisition device
To building surface each region temperature data reach in computer (13)；
3), image pre-processing module is corrected the building surface image of acquisition by the distortion parameter that calibration obtains, gas
Draining off to disturb causes wavefront distortion to seriously affect long-range image quality, with image enhancement, estimation fuzzy core, removes motion blur, obtains
To clear image；
4), image mosaic module, the clear image for building surface each region after pretreatment, using based on SIFT feature
Panoramic mosaic method for registering images, using SIFT algorithm carry out positioning feature point, by seeking the characteristic point in the image of crack
And its description in relation to Scale and Orientation obtains feature and carries out image characteristic point Rapid matching, rough splicing is each
Then area image eliminates splicing gap using PCA changing image blending algorithm, obtains large scale smoothly complete building table
Face image；
5), fracture profile extraction module obtains complete building surface image by the non-differential edge detection operator of Canny and splits
The marginal information of seam realizes the extraction of complete crack striped using morphologic algebraic operation and algorithm of region growing, so
The fracture profile of single pixel wide is obtained to complete crack strip extraction skeleton with Rosenfeld thinning algorithm afterwards；
6), fracture parameter calculation module calculates fracture length, and the half of fracture profile sum of all pixels m is taken to sit as pixel
Fracture length under mark system, the physical length in crack is roughly calculated out using pixel equivalent w,Wherein L is that crack is real
Border physical length, m are fracture profile sum of all pixels, and w is pixel equivalent；Fracture width is calculated, fracture profile skeleton vertical line is utilized
Intersection method on optional crack skeleton a little makees vertical line, hands over edge of crack in two o'clock P (x1,y1)、H(x2,y2), calculate two intersection points
Between geometric distanceIt is counted with this, the crack as the crack for choosing D maximum value is wide
The developed width in crack is roughly calculated out using pixel equivalent for degree, and W=Dw, wherein W is crack actual physics length, and D is to split
The fracture width under pixel coordinate system is stitched, w is pixel equivalent；
7) infrared measurement of temperature model is established according to the emissivity and Gaseous attenuation that are tested building surface, it is red in different-waveband
External radiation power is directly proportional to the r power of dut temperature, obtains temperature adjustmemt fitting formulaWherein T is true temperature after amendment, ToTemperature, T are measured for infrared sensoreFor week
Environment temperature is enclosed, α is tested building surface material emissivity, and τ (x) is for service band apart from infrared measurement of temperature in 8~14um
Atmospheric transmissivity at sensor x；
8) the collected building surface single point temperature data of infrared temperature probe, are corrected using temperature adjustmemt fitting formula,
Obtain the corresponding actual temperature value of building surface each point；
9) more accurate temperature field, is established using revised finite region temperature value, building is rebuild using spline method
Surface two-dimensional temperature field.
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