CN108534702A - A kind of deflection real-time measurement apparatus and method - Google Patents
A kind of deflection real-time measurement apparatus and method Download PDFInfo
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- CN108534702A CN108534702A CN201810684034.5A CN201810684034A CN108534702A CN 108534702 A CN108534702 A CN 108534702A CN 201810684034 A CN201810684034 A CN 201810684034A CN 108534702 A CN108534702 A CN 108534702A
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- 238000005259 measurement Methods 0.000 title claims abstract description 49
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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Abstract
The present invention discloses a kind of deflection real-time measurement apparatus and method,It is taken pictures by signal acquisition case remote observation,Realize remote contactless real-time deformation measurement,Signal acquisition case includes that two sets of camera guns combine,Using the nonstandard camera lens of high definition camera collocation,Optical magnification height and the image high definition of shooting,The deformation value precision higher obtained by calculating pixel number,The present invention uses double beam system,It is reliably fixed by babinet,Realize that object under test both ends measure simultaneously,Displacement is eliminated using the method for difference,Obtain accurate deflection,When two light paths of deviation while influence for thering is external interference to generate,This influence can be completely eliminated again because of difference operation,Systematic error is reduced to very little degree,To effectively reduce systematic error,Significantly improve the precision of deflection measurement.
Description
Technical field
The present invention relates to telemeasurement technical fields, more particularly to a kind of deflection real-time measurement apparatus and method.
Background technology
With the development of society, people are increasing to the demand of oil and products thereof, country builds up throughout the country
Many large-scale petroleum tank fields are storing this important strategic materials.
When fire occurs for oil tank, since the oil product of outflow burns, itself can be made and close on tank temperature rise, pressure inside the tank is fast
Speed increases, increasing to act on the power on metal tank skin, causes tank body to deform, and may finally explode.
Since the deflection that oil tank occurs in fire process is very small, and tank body nearby has fire when generation fire
The risk factors such as flame, dense smoke, ground trickling fire, steam, fire-fighting foams, tank body also have excessive, explosion of oil plant etc. possible, are unfavorable for
Close contact measures.
The deflection measurement method being currently known is mainly the following：
The first be testee surface attach foil gauge, when object occur miniature deformation when, foil gauge also therewith by
Power, electrical property are presented functional relation with deformation size, deformation quantity size can be deduced by measuring its electrical property.This side
Method requires testee surface deformation uniform, has ductility, generally metal material.Foil gauge need to reliably be tied with testee
It closes, generally takes the method for being bonded or welded, and foil gauge high temperature resistance is poor, generally can only achieve four or five hundred degrees Celsius.And it is oily
When fire occurs for tank, surface temperature is likely to be breached thousands of degrees Celsius, and has explosion danger at any time, it is difficult to close-in measurement.
It is for second the method for laser ranging, encountering object by recording laser reflects the time used, can push away
Actual range is calculated, to realize non-cpntact measurement.Civilian laser range finder precision is all relatively low, generally can only achieve decimetre
Grade, and our requirements to measurement accuracy will at least reach grade, the cost of such laser range finder will be very expensive, difficult
To realize application and popularize.
The third is the method for ultrasonic ranging, by record ultrasonic wave encounter body surface back reflection return echo when
Between, the distance in counting period.The measurement accuracy of this method is related to measurement distance, and distance is bigger, and precision is poorer.Such as to reach
The distance of grade measurement accuracy, measurement can only be just limited within one meter.It will be beside the oil tank that fire occurs within one meter
It is unpractical to look for a fixed installation point, and dangerous very big.
4th kind be 3-D scanning modeling method, use and large-scale the instrument that building is scanned can be built
The threedimensional model of object can analyze the variable quantity for calculating model by comparing the model built twice.This method is to big
It is longer the time required to type object scanning modeling, it is generally used for conservation of historic buildings and repairs work.In fast changing tank fire
Scene, data every second are required for refreshing, and it is unpractical to be measured by the method for scanning modeling.
Existing deflection measure device and method must close contact measurement, measurement accuracy it is low, and can not be real-time
Deflection is measured, however the deflection that oil tank occurs in fire process is very small, and also nearby there is tank body when generation fire
The risk factors such as flame, dense smoke, ground trickling fire, steam, fire-fighting foams, tank body also has excessive, explosion of oil plant etc. possible, in wink
The tank fire scene that breath ten thousand becomes, data every second are required for refreshing, it is necessary to the deflection of oil tank is known in real time, therefore,
Those skilled in the art are badly in need of a kind of deflection real-time measurement apparatus and method to realize large oil tank deflection in a fire
It measures in real time.
Invention content
The object of the present invention is to provide a kind of deflection real-time measurement apparatus and methods, remote contactless to realize
Real-time, high-precision deformation measurement.
To achieve the above object, the present invention provides following schemes：
A kind of deflection real-time measurement apparatus, including：Signal acquisition case, tripod and portable computer, the signal
Three Degree Of Freedom holder is provided between vasculum and the tripod, the Three Degree Of Freedom holder is for making the signal acquisition case
Rotation；
The signal acquisition case include babinet, the first camera lens, the first adapter ring, the first camera, the second camera lens, second turn
It is defeated to connect ring, the second camera, fixing axle, the first power module, second power supply module, the first signal output interface, second signal
Outgoing interface and AC power 220V interfaces；
First camera lens, first adapter ring, first camera, second camera lens, second switching
Ring, second camera, the fixing axle, first power module, the second power supply module may be contained within the case
Internal portion；First signal output interface, the second signal output interface and the AC power 220V interfaces are all provided with
It is placed on the babinet；
First camera lens is connect by first adapter ring with first camera, and the first camera lens-photograph is formed
Machine combines；Second camera lens is connect by second adapter ring with second camera, and the second camera lens-camera is formed
Combination, the first camera lens-camera combination are intersected with the second camera lens-camera combination and are fixed by the fixing axle
In the box house；First power module is separately connected first camera and the AC power 220V interfaces,
The second power supply module is separately connected second camera and the AC power 220V interfaces；The first signal output
Interface is connect with first camera, and the second signal output interface is connect with second camera；
The portable computer is separately connected first signal output interface and the second signal output interface, obtains
Take the image of first camera shooting of the first signal output interface output and the second signal output interface
The image of second camera shooting of output, and pass through the image of first camera shooting and second photograph
The image of machine shooting calculates deflection.
Optionally, the positive side face of the babinet includes transparent glass and metal edge frame, first camera lens and described second
Camera lens acquires external image by the transparent glass；Positive side described in the trailing flank face of the babinet, first signal
Output interface, the second signal output interface and the AC power 220V interfaces may be contained on the trailing flank；Institute
First power module is arranged in the left side position for stating the inside of babinet, and institute is arranged in the right side position of the inside of the babinet
State second power supply module.
Optionally, first camera and second camera are the single reflection of light for exporting 1080P and images above
Camera.
Optionally, the first camera lens-camera combination is located at upper and lower two with the second camera lens-camera combination
In a horizontal plane, and the intersecting angle of the first camera lens-camera combination and the second camera lens-camera combination passes through institute
Fixing axle is stated to fix.
Optionally, the fixing axle passes perpendicularly through the first camera lens-camera combination and the second camera lens-camera
The middle part of combination, the both ends of the fixing axle are individually fixed in the top and bottom of the babinet of the signal acquisition case.
A kind of deflection method for real-time measurement, including：
Obtain the left image PL0 of the first camera of the initial time shooting and right image PR0 of the second camera shooting；
The left image of first camera shooting of current time and subsequent time is continuously acquired by setting time interval
PL1 and PL2 and the right image PR1 and PR2 of second camera shooting；
Using the left image PL0 as home position, respectively by the left image PL1, the left image PL2 and the left figure
As PL0 progress images match, the coordinate position X2 of the coordinate position X1 and the left image PL2 of the left image PL1 are obtained；
Using the right image PR0 as home position, respectively by the right image PR1, the right image PR2 and the right side
Image PR0 carries out images match, obtains the coordinate position Y2 of the coordinate position Y1 and the right image PR2 of the right image PR1；
The determinand of the subsequent time and the current time is calculated according to formula Δ S=(Y2-Y1)-(X2-X1)
The coordinate difference of the coordinate difference of the deformation quantity of body, the deformation quantity is pixel quantity；
The deformed length of the object under test is calculated according to formula L=D*tan α, in the formula L=D*tan α, L
For the deformed length of the object under test, D is shooting distance, and α is 1/2 field angle；
Obtain the pixel sum for including in the deformed length of the object under test；
According to the deformed length of the object under test and pixel sum, single pixel point length is calculated；
According to the coordinate difference of the single pixel point length and the deformation quantity, the deflection of the object under test is calculated.
Optionally, the carry out images match, specifically includes：
Images match is carried out using image matching algorithm.
According to specific embodiment provided by the invention, the invention discloses following technique effects：Deformation disclosed by the invention
Real-time measurement apparatus and method are measured, is taken pictures by signal acquisition case remote observation, realizes remote contactless real-time change
Shape measurement, signal acquisition case include that two sets of camera guns combine, using the nonstandard camera lens of high definition camera collocation, optical amplifier
Multiple height and the image high definition of shooting so that the actual physical size smaller that each pixel in image represents passes through calculating
The deformation value precision higher that pixel number obtains, only shoots object under test one end, when to be measured relative to single light path system
When object tilts, inclined displacement will being recorded as dilatancy amount, the present invention uses double beam system,
It is reliably fixed by babinet, realizes that object under test both ends measure simultaneously, eliminated displacement using the method for difference, obtain accurately
Deflection, when have external interference generate deviation simultaneously influence two light paths when, it is this influence and can because of difference operation and by
It completely eliminates, systematic error is reduced to very little degree, to effectively reduce systematic error, significantly improve deformation
The precision of measurement.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structure composition figure of deflection real-time measurement apparatus embodiment of the present invention；
Fig. 2 is the vertical view of the signal acquisition case of deflection real-time measurement apparatus embodiment of the present invention；
Fig. 3 is the front view of the signal acquisition case of deflection real-time measurement apparatus embodiment of the present invention；
Fig. 4 is the rearview of the signal acquisition case of deflection real-time measurement apparatus embodiment of the present invention；
Fig. 5 is the flow chart of deflection method for real-time measurement embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of deflection real-time measurement apparatus and methods, remote contactless to realize
Real-time, high-precision deformation measurement.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention will be further described in detail.
Fig. 1 is the structure composition figure of deflection real-time measurement apparatus embodiment of the present invention.
Referring to Fig. 1, the deflection real-time measurement apparatus, including：Signal acquisition case 1, tripod 2 and portable computer 3,
Three Degree Of Freedom holder 4 is provided between the signal acquisition case 1 and the tripod 2, the Three Degree Of Freedom holder 4 is for making institute
State the rotation of signal acquisition case 1.
Signal acquisition case 1 by Three Degree Of Freedom holder 4 be mounted on tripod 2 on, portable computer 3 by data line with
Signal acquisition case 1 is connected.
The tripod 2 of expansion can be fixed at 50~100 meters of positions of object to be observed, and Three Degree Of Freedom holder 4 is solid
Due on the tripod 2 of expansion, signal acquisition case 1 is fixed on Three Degree Of Freedom holder 4, can be with the rotation of Three Degree Of Freedom holder 4
And rotate, the camera end of the signal acquisition case 1 need to shoot the image of the object under test towards the object under test, described
The angle of Three Degree Of Freedom holder 4 can be adjusted arbitrarily, and the angle by adjusting the Three Degree Of Freedom holder 4 makes the signal acquisition
1 symmetrical symmetry axis outline of case concentrates one's gaze on the top center of the object under test, and the signal acquisition case 1 is acquired at this time
Image is just the image of the both sides of the edge of the object under test.
The deflection real-time measurement apparatus is securable at 50~100 meters of positions of object to be observed, by remote
Observation, which is taken pictures, realizes non-contact measurement, and solving can not be by contactless telemetering relatively remote (herein referring to be more than 50 meters)
Mode obtain in real time large oil tank in a fire deformation data the technical issues of, can be apart from 50 meters of oil tank by the device
Obtain the deflection of oil tank in fire in real time in addition, it is remote apart from oil tank, it can ensure the safety of survey crew.
Fig. 2, Fig. 3, Fig. 4 are the vertical view of the signal acquisition case of deflection real-time measurement apparatus embodiment of the present invention, face
Figure, rearview.
Referring to Fig. 2, Fig. 3 and Fig. 4, the signal acquisition case 1 include babinet 101, the first camera lens 102, the first adapter ring 103,
First camera 104, the second camera lens 105, the second adapter ring 106, the second camera 107, fixing axle 108, the first power module
109, second power supply module 110, the first signal output interface 111, second signal output interface 112 and AC power 220V connect
Mouth 113.First camera 104 and second camera 107 are the single reflection of light phase for exporting 1080P and images above
Machine.
First camera lens 102, first adapter ring 103, first camera 104, second camera lens 105,
Second adapter ring 106, second camera 107, the fixing axle 108, first power module 109, described
Two power modules 110 may be contained within inside the babinet 101；First signal output interface 111, second signal output
Interface 112 and the AC power 220V interfaces 113 may be contained on the babinet 101.
The positive side face of the babinet 101 includes transparent glass 114 and metal edge frame 115, first camera lens 102 and described
Second camera lens 105 acquires external image by the transparent glass 114；Positive side described in the trailing flank face of the babinet 101,
First signal output interface 111, the second signal output interface 112 and the AC power 220V interfaces 113 are equal
It is set on the trailing flank；First power module 109 is arranged in the left side position of the inside of the babinet 101, described
The second power supply module 110 is arranged in the right side position of the inside of babinet 101.
First camera lens 102 is connect by first adapter ring 103 with first camera 104, forms first
Camera lens-camera combination；Second camera lens 105 is connect by second adapter ring 106 with second camera 107,
The second camera lens-camera combination is formed, the first camera lens-camera combination is intersected with the second camera lens-camera combination
And it is fixed on inside the babinet 101 by the fixing axle 108；First camera lens-the camera combination and second mirror
Head-camera combination is located in two horizontal planes up and down, and the first camera lens-camera combination and second mirror
The intersecting angle of head-camera combination is fixed by the fixing axle 108；The fixing axle 108 passes perpendicularly through first mirror
The both ends at the middle part of head-camera combination and the second camera lens-camera combination, the fixing axle 108 are individually fixed in institute
State the top and bottom of the babinet 101 of signal acquisition case 1；First power module 109 is separately connected first camera
104 and the AC power 220V interfaces 113, the second power supply module 110 be separately connected second camera 107 and institute
State AC power 220V interfaces 113；First signal output interface 111 is connect with first camera 104, and described second
Signal output interface 112 is connect with second camera 107.
The portable computer 3 is separately connected first signal output interface 111 and second signal output connects
Mouth 112 obtains the image for first camera shooting that first signal output interface 111 exports and second letter
The image for second camera shooting that number output interface 112 exports, and by image that first camera is shot with
And the image of the second camera shooting calculates deflection.
Fig. 5 is the flow chart of deflection method for real-time measurement embodiment of the present invention.
Referring to Fig. 5, the deflection method for real-time measurement, including：
Step 501：Obtain the left image PL0 of the first camera of initial time shooting and the right figure of the second camera shooting
As PR0.
Step 502：First camera shooting of current time and subsequent time is continuously acquired by setting time interval
Left image PL1 and PL2 and second camera shooting right image PR1 and PR2.
Step 503：Using the left image PL0 as home position, respectively by the left image PL1, the left image PL2 with
The left image PL0 carries out images match, obtains the coordinate of the coordinate position X1 and the left image PL2 of the left image PL1
Position X2.
Step 504：Using the right image PR0 as home position, respectively by the right image PR1, the right image PR2
Images match is carried out with the right image PR0, obtains the seat of the coordinate position Y1 and the right image PR2 of the right image PR1
Cursor position Y2.
The carry out images match in the step 503,504, specifically includes：
Images match is carried out using image matching algorithm.
Step 505：The subsequent time and the current time are calculated according to formula Δ S=(Y2-Y1)-(X2-X1)
Object under test deformation quantity coordinate difference, the coordinate difference of the deformation quantity is pixel quantity.
Step 506：The deformed length of the object under test, the formula L=D* are calculated according to formula L=D*tan α
In tan α, L is the deformed length of the object under test, and D is shooting distance, and α is 1/2 field angle.
Step 507：Obtain the pixel sum for including in the deformed length of the object under test.
Step 508：According to the deformed length of the object under test and pixel sum, it is long to calculate single pixel point
Degree.
Step 509：According to the coordinate difference of the single pixel point length and the deformation quantity, the object under test is calculated
Deflection.
Intersect the camera placed equipped with two sets in signal acquisition case of the present invention, can thus shoot oil tank both ends simultaneously
Image, to obtain the coordinate value at oil tank both ends.Intersect to place and can save installation space, reduces case and look in the distance mirror body in level
Size on direction.Two sets of cameras and camera lens are individually placed to up and down in two horizontal planes, due to its placement angle difference, from upper
Look down the effect for just being formed and being intersected, the angles of this two sets of cameras be in shooting process it is fixed, in shooting process not
Very important person is the angle for changing two sets of cameras, and since two sets of cameras are fixed in babinet, its angle of no human intervention is solid
Fixed, because fixing axle is with two sets of cameras, there are larger frictional resistance, pull unless there are larger outer force effect or artificially,
What the angle during normal photographing between two sets of cameras was no variation in, then this two sets of cameras are clapped in synchronization
The distance of the two images taken the photograph in the horizontal direction is exactly a fixed value, Triangle Principle is similar to, when isosceles triangle
Two waists and apex angle determine, then this isosceles triangle also determines that, then bottom edge length also determines that, that is,
It says in two images and is remained unchanged as the distance between pixel on some angle of coordinate reference points.Assuming that a certain moment two
The coordinate at object both ends to be measured is respectively X1 and Y1 in two images captured by camera, shoots institute after a period of time again
The object both ends coordinate of acquisition is X2 and Y2, then the variable quantity (the namely deflection of object) of object both ends distance is exactly
(Y2-Y1)-(X2-X1), because reference axis is unified, therefore X2-X1 is negative value, and length should be-(X2-X1), total
Deflection is exactly (Y2-Y1)-(X2-X1).This is a general formula, and the calculated result of this formula can intuitively reflect
The size of deformation of body amount, result are positive value, illustrate that object becomes larger；As a result it is negative value, illustrates that object becomes smaller.As a result exhausted
It is the numerical value of variation to value.
Camera lens and camera in signal acquisition case of the present invention are docked by adapter ring, and optical magnification is high, can be incited somebody to action
About 60 times of the object under test image zoom that 100 meters or so of distance because the amplification factor of optical lens used reached 40 to
60 times, existing camera standard configuration camera lens is difficult to reach this requirement, so using nonstandard camera lens, it is necessary to adapter ring ability of arranging in pairs or groups
Shooting.The image is filmed by high definition camera (output 1080P and the single-lens reflex camera of images above), is stored as picture text
Part, because using high definition camera, high certainty of measurement, optical magnification height and image high definition allow for each picture in image
The actual physical size that vegetarian refreshments represents wants smaller, just has higher by calculating the deformation value that pixel number obtains in this way
Precision.By the way that data line to be connected on signal output interface, then the other end connects portable computer, and high definition is taken a picture
The picture file of machine shooting is by data line transfer to portable computer.Portable computer is by running special image processing
Software carries out analyzing processing to the picture file that camera is sent using Boundary Recognition and simple plus and minus calculation, can will scheme
The coordinate of picture calculates, and the process for calculating image coordinate mainly uses image matching algorithm in the prior art.Due to number
The image that camera is generated is digital picture, and many pixels that piece image is determined by horizontal and vertical coordinate form, often
A pixel all carries all multi informations such as different coordinates, brightness, color.One object is by several continuous in the picture
Pixel forms, these pixels carry metastable information, and according to certain mode permutation and combination.If choosing in advance
A part of region on earnest body, and the information characteristics value for the pixel for forming the region is recorded, then being subjected to displacement in object
Afterwards, as long as camera site and angle are constant, so that it may identical as record information characteristics value before to be searched in shot image afterwards
Or similar region, it is considered that the maximum region of similarity is exactly selected before region.In this way, comparing object before movement
Afterwards on characteristic area certain point (generally selecting the point on some angle) coordinate value, the picture that object moves in the picture can be calculated
Vegetarian refreshments quantity, then by the length after shooting distance, field angle and deformation of body, utilize formula L=D*tan α, i.e. deformation of body
Length afterwards=shooting distance * tan (1/2 field angle), so that it may to determine the distance represented between pixel, to extrapolate object
The distance of body movement.For selected single-lens reflex camera, field angle is fixed, is had been given in technical parameter, shooting
The methods of laser ranging can be used to obtain for distance, and the length after deformation of body can be thus found out by above-mentioned formula.And
In the image taken, the object photographed is made of thousands of a pixels, these pixels are uniformly distributed, and are often gone
The pixel number of each column is it is known that so using L (length after deformation of body) divided by forming the pixel on object length direction
Number is exactly the distance represented between pixel.The problem of so the problem of deflection, just becomes seeking number of pixels.
Two sets of camera guns are arranged in signal acquisition case of the present invention to combine, forms double beam system, shoots object respectively
Left and right ends.For monochromatic light road, systematic error is reduced.First, single light path system only shoots object one end, works as object
When tilting, inclined displacement will be recorded as dilatancy amount, and can not eliminate.The present invention is using double light
Road system, object both ends measure simultaneously, eliminate displacement using the method for difference, obtain accurate deflection.Secondly, monochromatic light
Road system is using the earth as coordinate reference points, and default system is completely fixed with the earth, when by wind, gravity deformation, temperature deformation etc.
When factor influences, generated measurement error is interfered to be even more than the practical distortion amount of object.The present invention uses double light path
System is reliably fixed by babinet, since the deviation that external interference generates can influence two light paths simultaneously, and this influence meeting
It is completely eliminated because of difference operation, systematic error is reduced to very little degree.
Deflection real-time measurement apparatus disclosed by the invention and method are taken pictures by signal acquisition case remote observation, real
Now remote contactless real-time deformation measurement, signal acquisition case include that two sets of camera guns combine, and are shone using high definition
The image high definition of the nonstandard camera lens of camera collocation, optical magnification height and shooting so that each pixel in image represented
Actual physical size smaller, the deformation value precision higher obtained by calculating pixel number, relative to single light path system
Only shooting object under test one end will record inclined displacement as dilatancy amount when object under test tilts
Get off, the present invention uses double beam system, is reliably fixed by babinet, realizes that object under test both ends measure simultaneously, utilizes difference
Method eliminate displacement, obtain accurate deflection, when have external interference generate deviation simultaneously influence two light paths when, this
Kind influences to be completely eliminated because of difference operation again, and systematic error is reduced to very little degree, to effectively subtract
Small systematic error significantly improves the precision of deflection measurement.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For method disclosed in embodiment
For, since it is corresponding with system disclosed in embodiment, so description is fairly simple, related place is defended oneself referring to Account Dept
It is bright.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of deflection real-time measurement apparatus, which is characterized in that including：Signal acquisition case, tripod and portable computer,
Three Degree Of Freedom holder is provided between the signal acquisition case and the tripod, the Three Degree Of Freedom holder is for making the letter
The rotation of number vasculum；
The signal acquisition case includes babinet, the first camera lens, the first adapter ring, the first camera, the second camera lens, the second switching
Ring, the second camera, fixing axle, the first power module, second power supply module, the first signal output interface, second signal output
Interface and AC power 220V interfaces；
First camera lens, first adapter ring, first camera, second camera lens, second adapter ring, institute
The second camera, the fixing axle, first power module, the second power supply module is stated to may be contained in the babinet
Portion；First signal output interface, the second signal output interface and the AC power 220V interfaces may be contained within
On the babinet；
First camera lens is connect by first adapter ring with first camera, and the first camera lens-photograph unit is formed
It closes；Second camera lens is connect by second adapter ring with second camera, and the second camera lens-photograph unit is formed
It closes, the first camera lens-camera combination is intersected with the second camera lens-camera combination and is fixed on by the fixing axle
The box house；First power module is separately connected first camera and the AC power 220V interfaces, institute
It states second power supply module and is separately connected second camera and the AC power 220V interfaces；The first signal output connects
Mouth is connect with first camera, and the second signal output interface is connect with second camera；
The portable computer is separately connected first signal output interface and the second signal output interface, obtains institute
State image and the second signal output interface output of first camera shooting of the first signal output interface output
Second camera shooting image, and pass through first camera shoot image and second camera clap
The image taken the photograph calculates deflection.
2. deflection real-time measurement apparatus according to claim 1, which is characterized in that the positive side face of the babinet includes saturating
Bright glass and metal edge frame, first camera lens and second camera lens acquire external image by the transparent glass；It is described
Positive side described in the trailing flank face of babinet, first signal output interface, the second signal output interface and described
AC power 220V interfaces may be contained on the trailing flank；Left side position setting first electricity of the inside of the babinet
The second power supply module is arranged in the right side position of source module, the inside of the babinet.
3. deflection real-time measurement apparatus according to claim 1, which is characterized in that first camera and described
Two cameras are the single-lens reflex camera for exporting 1080P and images above.
4. deflection real-time measurement apparatus according to claim 1, which is characterized in that the first camera lens-photograph unit
It closes and is located in two horizontal planes up and down with the second camera lens-camera combination, and the first camera lens-camera combination
It is fixed by the fixing axle with the intersecting angle of the second camera lens-camera combination.
5. deflection real-time measurement apparatus according to claim 1, which is characterized in that the fixing axle passes perpendicularly through described
The middle part of first camera lens-camera combination and the second camera lens-camera combination, the both ends of the fixing axle are individually fixed in
The top and bottom of the babinet of the signal acquisition case.
6. a kind of deflection method for real-time measurement applied to claim 1 described device, which is characterized in that including：
Obtain the left image PL0 of the first camera of the initial time shooting and right image PR0 of the second camera shooting；
Continuously acquired by setting time interval first camera shooting of current time and subsequent time left image PL1 and
PL2 and the right image PR1 and PR2 of second camera shooting；
Using the left image PL0 as home position, respectively by the left image PL1, the left image PL2 and the left image
PL0 carries out images match, obtains the coordinate position X2 of the coordinate position X1 and the left image PL2 of the left image PL1；
Using the right image PR0 as home position, respectively by the right image PR1, the right image PR2 and the right image
PR0 carries out images match, obtains the coordinate position Y2 of the coordinate position Y1 and the right image PR2 of the right image PR1；
The subsequent time and the object under test at the current time are calculated according to formula Δ S=(Y2-Y1)-(X2-X1)
The coordinate difference of the coordinate difference of deformation quantity, the deformation quantity is pixel quantity；
The deformed length of the object under test is calculated according to formula L=D*tan α, and in the formula L=D*tan α, L is institute
The deformed length of object under test is stated, D is shooting distance, and α is 1/2 field angle；
Obtain the pixel sum for including in the deformed length of the object under test；
According to the deformed length of the object under test and pixel sum, single pixel point length is calculated；
According to the coordinate difference of the single pixel point length and the deformation quantity, the deflection of the object under test is calculated.
7. deflection method for real-time measurement according to claim 6, which is characterized in that the carry out images match, specifically
Including：
Images match is carried out using image matching algorithm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006599A (en) * | 2019-10-30 | 2020-04-14 | 东北大学 | Object surface micro-scale measurement method based on pixel grating and computer vision |
| CN112057057A (en) * | 2020-08-11 | 2020-12-11 | 上海掌门科技有限公司 | Method and apparatus for adjusting pulse measurement device and measuring pulse signal |
| CN113048888A (en) * | 2021-03-05 | 2021-06-29 | 杭州国翌科技有限公司 | Binocular vision-based remote three-dimensional displacement measurement method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163129A (en) * | 2011-04-26 | 2011-08-24 | 宇龙计算机通信科技(深圳)有限公司 | Method and device for implementing icon deformation |
| US20130063570A1 (en) * | 2011-08-02 | 2013-03-14 | John G. Michopoulos | System and Method for Remote Full Field Three-Dimensional Displacement and Strain Measurements |
| CN104200474A (en) * | 2014-09-04 | 2014-12-10 | 华中科技大学 | Digital image analysis method for obtaining object deformation quantity |
| CN104864819A (en) * | 2015-01-19 | 2015-08-26 | 华中科技大学 | Digital speckle-based high-speed three-dimensional strain measurement method |
| CN107643071A (en) * | 2016-07-20 | 2018-01-30 | 陈进益 | Mobile distance measuring device and distance measuring method thereof and land area measuring method |
-
2018
- 2018-06-28 CN CN201810684034.5A patent/CN108534702A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163129A (en) * | 2011-04-26 | 2011-08-24 | 宇龙计算机通信科技(深圳)有限公司 | Method and device for implementing icon deformation |
| US20130063570A1 (en) * | 2011-08-02 | 2013-03-14 | John G. Michopoulos | System and Method for Remote Full Field Three-Dimensional Displacement and Strain Measurements |
| CN104200474A (en) * | 2014-09-04 | 2014-12-10 | 华中科技大学 | Digital image analysis method for obtaining object deformation quantity |
| CN104864819A (en) * | 2015-01-19 | 2015-08-26 | 华中科技大学 | Digital speckle-based high-speed three-dimensional strain measurement method |
| CN107643071A (en) * | 2016-07-20 | 2018-01-30 | 陈进益 | Mobile distance measuring device and distance measuring method thereof and land area measuring method |
Non-Patent Citations (1)
| Title |
|---|
| 吕商羽: "火灾条件下固定顶油罐罐体形变量测量方法研究", 消防技术与产品信息, vol. 31, no. 1, pages 25 - 29 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006599A (en) * | 2019-10-30 | 2020-04-14 | 东北大学 | Object surface micro-scale measurement method based on pixel grating and computer vision |
| CN111006599B (en) * | 2019-10-30 | 2021-07-20 | 东北大学 | Object surface micro-scale measurement method based on pixel grating and computer vision |
| CN112057057A (en) * | 2020-08-11 | 2020-12-11 | 上海掌门科技有限公司 | Method and apparatus for adjusting pulse measurement device and measuring pulse signal |
| CN113048888A (en) * | 2021-03-05 | 2021-06-29 | 杭州国翌科技有限公司 | Binocular vision-based remote three-dimensional displacement measurement method and system |
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