CN208505255U - Laser datum bridge single-point amount of deflection vision inspection apparatus - Google Patents
Laser datum bridge single-point amount of deflection vision inspection apparatus Download PDFInfo
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- CN208505255U CN208505255U CN201820805726.6U CN201820805726U CN208505255U CN 208505255 U CN208505255 U CN 208505255U CN 201820805726 U CN201820805726 U CN 201820805726U CN 208505255 U CN208505255 U CN 208505255U
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Abstract
The utility model provides a kind of laser datum bridge single-point amount of deflection vision inspection apparatus: including the transmission-type target irradiated for receiving laser light source being set on cabinet, target image acquisition and processing module are provided in the cabinet, target image acquisition and processing module include optical filter, camera lens, ccd image acquisition unit, the image processing unit of video decoding unit and for identification laser spot position, optical filter is set between transmission-type target and camera lens, ccd image acquisition unit is set on the transmission-type target imaging optical path of camera lens, video decoding unit is connected with described image processing unit and ccd image acquisition unit respectively.The utility model accurately and easily can obtain bridge deflection measurement as a result, the dynamic range of measurement is big, and the contradiction of solution high-precision and real-time ensure that the measuring precision and efficiency.
Description
Technical field
The utility model relates to the deflection detectors based on high-precision laser benchmark and photoelectric image identification, and in particular to
Laser datum bridge single-point amount of deflection vision inspection apparatus.
Background technique
The amount of deflection of bridge is the common metric parameter of bridge operation conditions, in the load evaluation of bridge, health monitoring, temperature
Extremely wide application is obtained in effect, stress loss, is the important parameter index of bridge health status evaluation, it can be to bridge
Bearing capacity assessed, instruct the maintenance and repair of bridge to work, therefore, it is necessary to its long term monitoring, it is ensured that bridge knot
Structure service reliability promotes its safety assurance ability.
Deflection metrology contactless at present includes: (1) photoelectronic imaging and CCD camera method: by setting up video camera alignment
Target records the Vibration Condition of image on target, obtains deflection data by computer.(2) photoelectricity spectroscopic imaging and high-speed line
Battle array CCD method: receiving the monochromatic light of luminescence target target specific wavelength using photoelectric converter, carries out A/D conversion, obtains measured value.
Both the above method is influenced by image identification and light source, and detection process is complicated, and real-time is poor, and detection accuracy is lower.For
This, is had been reported that using on the basis of laser, is detected using the 4 quadrant detector that point position is disposed to deflection of bridge span, but
It is that 4 quadrant detector detection dynamic range is limited, and position resolution precision is low, it is expensive, it has a single function, is unfavorable for pushing away extensively
Wide application.
Summary of the invention
The purpose of this utility model is to provide a kind of laser datum bridge single-point amount of deflection vision inspection apparatus.
In order to achieve the above objectives, the utility model uses following technical scheme:
The detection device include cabinet and be set on cabinet for receive laser light source (650nm) irradiation transmission
Formula target, target image acquisition and processing module are provided in the cabinet, and target image acquisition and processing module include filtering
Unit, camera lens, ccd image acquisition unit, video decoding unit and for identification in target image laser spot position figure
As processing unit, filter unit is set between transmission-type target and camera lens, and ccd image acquisition unit is set to the transmission of camera lens
On formula target imaging optical path, video decoding unit is connected with described image processing unit and ccd image acquisition unit respectively.
Preferably, the transmission-type target is selected from diffusing panel.
Preferably, the filter unit is selected from the narrow band filter that central wavelength is 650nm.
Preferably, the ccd image acquisition unit is selected from ultra low illumination camera.
Preferably, the video decoding unit includes the TVP51 for the signal of ccd sensor to be converted to digital signal
50AM chip.
Preferably, described image processing unit includes the two dimension for resolving laser spot center on transmission-type target image
The high performance DSP (for example, TMS320DM642) of coordinate information.
Preferably, the detection device further includes human-computer interaction and communication module, and human-computer interaction includes setting with communication module
The STC12C5A60S2 chip (can according to hot spot two-dimensional coordinate information calculate amount of deflection parameter) that is placed in cabinet and it is set to machine
The people's circle interactive interface (for example, display interface and key) being connected with STC12C5A60S2 chip and wireless telecommunications mould on case
Block, the target image acquisition and processing module (referring specifically to described image processing unit) are connected with STC12C5A60S2 chip.
Preferably, the detection device further includes that can use wireless communication module and target image acquisition and handle
The remote monitoring module of module communication.In order to simplify cabinet internal model block size and function, ccd image acquisition unit can be acquired
Signal, be directly transferred to remote monitoring module after decoded, by remote monitoring module complete image in spot center two dimension sit
Mark resolves and amount of deflection calculates, thus, it is possible to which the parts of images processing function omitted in cabinet (refers specifically to no longer carry out in hot spot
Heart two-dimensional coordinate resolves, and retains the function that data image signal is sent to remote monitoring module).
Preferably, the parallel collimation laser and transmission-type target that the laser light source issues are perpendicular.
The beneficial effects of the utility model are embodied in:
The utility model cleverly combines laser and image target, using target as light figure conversion element, by laser
The relative displacement of beam is converted to the movement of hot spot, is imaged by camera lens, through optical filtering, by the target image containing hot spot at
On picture to ccd detector, and image acquisition units are utilized, acquisition has the target image of laser facula, in conjunction with existing maturation
Image processing techniques and coordinate system transformation calibration technique, can be accurate and convenient in the measurement for being applied to deflection of bridge span parameter
Obtain deflection of bridge span result of variations, the dynamic range of deflection metrology is big (as long as hot spot is located on target, and target size tune
After whole, it is only necessary to which the adjustment camera lens of adaptability is at a distance from target, i.e. object distance).
Further, using narrow band filter, the influence that external environmental light recognizes laser facula can be effectively removed.
Further, by using human-computer interaction and communication module, remote monitoring module, can be applied to exploitation meet it is various
The network-enabled intelligent deflection metrology product of operating condition.
Detailed description of the invention
Fig. 1 is the hardware block diagram of the utility model.
Fig. 2 a is bridge load amount of deflection feature schematic diagram (easy single-span beam bridge model)；In figure: 16- line of deflection.
Fig. 2 b is bridge load amount of deflection feature schematic diagram the case where (bridge any external force of no receiving).
Fig. 2 c is bridge load amount of deflection feature schematic diagram (bridge receiving random load).
Fig. 3 is laser datum deflection of bridge span detection schematic diagram.
Fig. 4 is laser datum deflection parameter measuring apparatus functional block diagram.
Fig. 5 is Intelligent target structure of the detecting device schematic diagram；In figure: 1- diffuses optical target；2- optical filter；3- single-chip microcontroller
Show communication unit；4- wireless communication antenna；5- camera lens；6-DM642 image processing unit；7- cabinet.
Fig. 6 is monocular target surface coordinate system schematic diagram；In figure: 12- target plane.
Fig. 7 is DM642 image processing flow figure.
Fig. 8 is long-range monitoring subsystem structure chart；In figure: 8-STR30 wireless module；9-TTL turns usb circuit；
The computer terminal 10-；11- upper computer software.
Fig. 9 is that target surface installs heeling error schematic diagram.
Figure 10 is benchmark position excursion error schematic diagram.
Figure 11 is that atmospheric turbulance influences schematic diagram to laser beam；In figure: 13- laser beam, 14- light spot shape, 15- turbulent flow
Atmospheric medium.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1
The utility model proposes a kind of embedded bridge beam deflection image-type detection devices using laser datum, specifically set
The hardware circuit for having counted the measurement data Visual readings based on transmission-type target, analyze influence device measurement error it is main because
Element, and the precision of measurement is demonstrated by actual measurement.Package unit is applied to solve high-precision in the measurement of deflection of bridge span parameter
With the contradiction of real-time, the measuring precision and efficiency ensure that.
Referring to Fig. 1, the hardware circuit of the embedded bridge beam deflection image-type detection device using laser datum, mainly
Including video decoding circuit, the circuit, asynchronous communication circuit, decoding circuit, the human-computer interaction circuit that are handled in real time target image
And wireless communication line, complete the tasks such as deflection of bridge span detection, the display of result, mark fixed sum data transmission.Simultaneously in long-range electricity
Brain Terminal Design upper computer software shows and stores measurement data, realizes the remote wireless control of deflection of bridge span detection and exists in real time
Line monitoring.CCD camera collects target image, by TVP5150AM chip carry out video decoding, then in DM642 into
The high speed processing of row Measurement Algorithm, the change in location of laser facula in recognisable image, the data handled with
STC12C5A60S2 is to calculate deflection metrology result in the human-computer interaction and communicating circuit of core chips and show and send.
The factors such as load, environment temperature, beam body members contract can all cause bridge deflection, when bridge to scratch variable excessive
When, it will lead to beam body and generate crack and damage, influence the safety and normal use of bridge.By taking load as an example, as shown in Figure 2 a one
A easy single-span beam bridge model, ideally, bridge is deformed under the action of external force p, and beam body is curved along the y-axis direction
Qu Chengyi curve, this curve are known as the sag curve (line of deflection) of bridge, ybIndicate largest deformation amount, that is, amount of deflection of beam body
Maximum value.As shown in Figure 2 b, for bridge in the case where any external force of no receiving, bridge is solely subjected to the active force of own wt
And it is uniformly distributed in beam body, deflection equation of bridge under the action of own wt in beam body at the x of any point can indicate
Are as follows:
Wherein, L indicates beam body overall length, and q is bridge density, and EI is a constant, the i.e. product of elasticity modulus and the moment of inertia,
Indicate the bending stiffness of bridge.
Assuming that the active force that random load generates is P, beam body deforms under the action of being subjected only to external force P, such as Fig. 2 c
It is shown.Deflection equation when bridge bears random load in beam body at the x of any point is expressed as follows:
In the linear-elastic range of beam body, thereon at the x of any point scratch variable can be regarded as bridge own wt and
The external force that random load generates is superimposed and generates, so deflection equation can be calculated by the addition method, such as following formula:
Analysis mode (3), wherein beam body length L, tested point position x and a, b parameter value are it is known that pass through beam body after measurement load
The deflection value y of upper 3 different locations brings three groups of measured values into formula (3) simultaneous solution respectively, can acquire in formula not
The value of parameter P, q, EI are known, to obtain the deflection equation that beam body bears fixed load P.
Formula (3) indicates the sag curve equation of bridge load in the ideal case, in actual use situation ratio
It is more complex, other than load, the influence of the factors such as girder construction, temperature, contraction is also suffered from, then the actural deflection formula of bridge
It is expressed as follows:
fs=fp+fq+fT+fc+δe (4)
Wherein, fsVariable, f are actually scratched in expressionpIndicate receiving external world load action power P generation scratches variable, fqIndicate beam body
What own wt generated scratches variable, fTIndicate the variable of scratching of generation influenced by ambient temperature, fcIndicate that beam body material property influences to produce
Raw scratches variable, δeFor systematic error.
Referring to Fig. 3, the detection of laser datum deflection of bridge span is the linear transmission principle using laser, using laser beam as measurement
Benchmark converts displacement of the hot spot in target face for the variable of scratching of bridge using the imaging target of transmission-type, further according at
Picture and image processing techniques calculate the spot center displacement of measured point, just obtain the deflection value of the point.In bridge when detection
Beam body chooses span centre L/2 point and is used as tested point, at this point by measurement target drone placement, while by reference laser generator (laser
Light source) it is placed in bridge pier fixed position, laser beam gets a laser facula on measurement target drone at this time, adjusts emergent pupil focal length
Laser facula is adjusted to suitable size.First measure to obtain laser facula on target to tested point before bridge does not load
Initial position co-ordinates (x0,y0), tested point is measured to obtain the position coordinates of laser facula again after bridge load
(x1,y1), then the facula position that the tested point of bridge measures twice is respectively as follows: Δ x along the difference of the distance in the direction image x and the direction y
=x1-x0With Δ y=y1-y0, it is hereby achieved that the deflection value (amount of deflection of being self-possessed of creeping without bridge) of corresponding tested point.Knot
Close the deflection value that measures at the L/4 point of span centre two sides 2, bring formula (3) into, so that it may obtain this across sag curve.
Referring to fig. 4, in order to make target complete laser datum deflection parameter measurement function in real time at tested point, intelligence is devised
Energy target, mainly by transmitted light target, CCD camera, optical filter, imaging lens, DSP image signal process plate, people
Machine is interactive and wireless transmission board group is at reference beam is radiated at one hot spot of formation, position on transmitted light target target surface first
CCD camera shooting in target rear has the target image of hot spot, the image of DSP image signal process plate acquisition camera
Signal, and be converted into data image signal and resolved, obtain the location information of hot spot, human-computer interaction and wireless transmission plate
Deflection value can be obtained according to location information.
Referring to Fig. 5, in the Intelligent target, target mode is converted using transmitted light image, optical target plane
Having a size of m × n.Optical target target surface is made of diffusion filter (such as diffusing panel), so as to wiping out background clutter image, from
And the signal-to-noise ratio of system is improved, improve the light plot quality on imaging plane, diffusing panel has preferable diffusion effect, and direct projection swashs
Radiant can become the light source of diffusion after diffusing reflection plate, use transmission-type diffusing panel as laser pick-off conversion equipment,
The uniform and stable irradiated region that diffuses can be obtained, so that the laser facula on target target surface be made uniformly to stablize.Target surface
Dispose CCD imaging device afterwards, optical filter 2 be installed before camera lens, imaging lens 5 to optical target (i.e. diffusion optical target 1) away from
From for d, optical target is imaged on imaging sensor (CCD) by imaging lens 5, obtains that symmetry is good, energy is uniform
Representation of laser facula.Scan picture circuit (i.e. DSP image signal process plate) and human-computer interaction are installed inside target and led to
News circuit (i.e. human-computer interaction and wireless transmission plate) complete target image handle in real time, show and data transmit.
Specifically, optical target target surface size are as follows: m × n=170m × 120mm, video camera select the W of Watec company
The pal mode video camera of AT902H2 ultra-low illumination, CCD size 1/2 ", image planes export 1Vpp- having a size of 6.4 × 4.8mm, video
75 Ω, valid pixel 752 (H) × 582 (V), signal-to-noise ratio 50dB, the interference of noise on image quality when shooting darker scene
It is smaller.The operating distance of target imaging system is about 100mm, therefore the amplification factor of camera lens is acquired using formula are as follows:
PMAG=6.4/170 ≈ 0.03764 (5)
The then focal length of camera lens are as follows:
F=0.03764 × 100/ (1+0.03764) ≈ 3.627mm (6)
Selectable lens focus has the standard specifications such as 4mm, 8mm, 12.5mm, 16mm under normal conditions, so selection is most
The camera lens that focal length close to calculated value is 4mm.Target plane, which is calculated, further according to lens focus arrives the distance between camera lens:
D=WD=(1+0.3.764) × 4/0.03764=110.27mm (7)
It is reference with the calculated results of target imaging system parameters, the minimal illumination of WAT902H2 is
0.0003Lux/F1.4, is equivalent to the illumination that no moonlight irradiation skylight generates on ground, thus no matter daytime or night
Video camera can work normally, and collect laser target image information, to guarantee no matter can be reliably completed round the clock
The detection of deflection of bridge span.
Referring to Fig. 6, Intelligent target system is monocular two-dimensional measurement system, and it is flat that video camera is mounted perpendicular to target work
Face, the position of video camera and inside and outside parameter are fixed, and are centered on the optical axis of video camera, and with the direction from video camera to target surface
Positive direction establishes coordinate system, target surface coordinate origin OwThe intersection point of optical axis center line and target surface plane, Z may be selectedwDirection and ZcSide
To identical.Then the outer ginseng matrix for having video camera is R=I, p=[0,0, d]T, d is optical axis center point OcTo the distance of target surface.?
On working face, target surface coordinate is represented by (xw,yw, 0), coordinate of the target surface point under video camera can be obtained are as follows:
Do not consider to distort, then intrinsic parameter uses four parameter camera models, for the two o'clock P on working face1=[xw1,
yw1, 0], P2=[xw2,yw2, 0], utilize (8) can obtain:
(u1,v1) it is P1Point image coordinate；(u2,v2) it is P2The image coordinate of point, kxd=kx/ d, kyd=ky/ d is calibration
Video camera parameter.
Referring to Fig. 7, the process of DM642 image procossing: the hot spot target of acquisition ccd sensor first (has hot spot
Target image) signal and it is translated into digital signal, the treatment processes such as then denoised, divided in core chips DM642
The pixel coordinate value for obtaining the spot center displacement of measurement target drone, the two-dimensional coordinate of spot center is calculated further according to calibration factor
Information is finally transmitted it out by interface circuit.
Using TMS320DM642 (abbreviation DM642) chip as core processor, target image core processing algorithm is completed, it is real
The precise positioning of spot center on existing target image.There is vision hardware resource abundant on DM642 chip, it can be soft comprising three
Video port VP0, VP1, VP2 of part configuration.DM642 chip arithmetic speed is fast and to store extended capability very strong, due to target
It needs to occupy a large amount of memory space in the acquisition and treatment process of logo image, so chip exterior extends mass storage device
SDRAM, to meet the memory requirement of image data.
The video decoding circuit, major function are that the target image analog signal of CCD camera output is passed through hardware
Circuit decoding, exports the digital video signal of YCbCr4:2:2 format.Using the TVP5150AM chip of TI company, PAL is supported
It is decoded with the video of NTSC format, the YCbCr4:2:2 digital picture that output format is 8.Pass through the I of DM642 chip2C is total
The read-write operation of line traffic control TVP5150AM chip is sent to by the decoded target image digital signal of TVP5150AM chip
The port VP0 of DM642 chip (i.e. DM642 chip connects C CD video camera by video decoding circuit).
The asynchronous communication circuit, function are to realize that the data between DM642 chip and single-chip microcontroller STC12C5A60S2 pass
It is defeated, the spot center two-dimensional coordinate information calculated is sent to single-chip microcontroller STC12C5A60S 2 by RS232 interface circuit.
Although the port the VP0 McBSP of DM642 chip can by software configuration at serial ports communication mode, the port VP0 by
Video acquisition occupies, so the serial ports of asynchronous communication transceiver expanded circuit must be utilized.Asynchronous communication circuit is using TI company
TL16C752B chip expansing serial interface, TL16C752B chip are configurable to RS232 R S485 communication mode,
The interface circuit of RS232 provides (i.e. DM642 chip passes through the interface circuit of asynchronous communication circuit connection RS232) by MAX3221.
The decoding circuit, being will fastly, so needing in DM642 chip exterior very fast according to the speed of design requirement decoding
Decoding is completed in the cooperation of PAL device.CPLD (Complex Programmable Logic Devices) is a kind of large-scale integrated circuit, and user can root
The digital integrated electronic circuit of constitutive logic function is programmed by Integrated Development software platform according to respective demand.CP LD device
Timing it is stringent, fast speed, flexible in programming, be very suitable to realize circuit fast decoding.In decoding circuit using
The EPM240 chip of altera corp, Resources on Chip include 240 macroelements, and 80 ports I/O, having can compile in system in real time
Cheng Xing.EPM240 chip by decoding circuit by a part of address space of CE1 be respectively mapped to FLASH, itself, realize circuit
Fast decoding, to make the peripheral circuits cooperating such as DM642 chip and asynchronous communication circuit and video decoding circuit.
The human-computer interaction circuit major function is (by the interface circuit for connecting RS232) to receive RS232 interface transmission
Spot center two-dimensional coordinate information, bridge is then calculated scratches variable element, shows on human-computer interaction interface, and lead to
Cross the remote data transmission that wireless communication line realizes detection device and computer terminal.User can be by human-computer interaction circle simultaneously
The working condition and measurement zero point of the key setting detection system in face.Human-computer interaction circuit using STC12C5A60S2 as core at
Chip is managed, the Resources on Chip of the chip includes two mutually indepedent serial ports, and second serial can be exported by programmed configurations
Pin can be achieved at the same time the data transmission between DM642 chip, wireless communication line.Human-computer interaction interface is for showing
The function setting of the amount of deflection information and detection system of bridge.Its display circuit using two 5 charactrons show respectively along
The hot spot two-dimensional coordinate displacement information in the direction image x and the direction y.Its key circuit includes that three function buttons are respectively used to be arranged
Working state of system, measurement zero point and zero point reset.
The wireless communication line scratches bridge for realizing the remote data transmission between test side and computer terminal
Degree information sends computer terminal to.Detection device uses STR30 type micropower wireless transport module, supports a variety of serial ports bauds
Rate can be realized intelligent transportation control, only need to can without writing extra program from the direct sending and receiving data of communication interface
By transmission range 300-4000m.The UART interface and STC12C5A60S2 chip second serial of STR30 module are directly connected to conduct
Data sending terminal.
Referring to Fig. 8, long-range monitoring refers to the remote wireless control and real time on-line monitoring for realizing amount of deflection detection.Including STR3
0 wireless module 8, TTL turn USB electric level interface circuit 9 and computer terminal 10.STR30 wireless module turns USB level by TTL and connects
Mouth circuit is connect with computer terminal, for realizing the wireless data transmission between remote terminal and test side.It writes computer terminal
Upper computer software 11 is used to receive the bridge deflection information of measurement end, and simulative display target video information simultaneously records measurement data.
The upper computer software is made a software using Java language, different D is received using socket and multithreading
The deflection of bridge span data information transfer that TU is sent directly acquires the data of deflection of bridge span by software, according to upload to software
Data creating goes out the risk map of deflection of bridge span, there is corresponding alarm when reaching warning value.
Referring to Fig. 9, ideally target plane during the installation process should perpendicular to reference beam, but actually due to
Installing reason, always there is a certain error, i.e., target surface installs heeling error.Assuming that target plane has one during the installation process
Fixed tiltangleθ, when assuming displacement of the amount of flexibility on vertical position for h when middle span deflexion in this way, due to target and base
Collimated light beam out of plumb, the actual displacement value that Intelligent target measures will be h ', can be obtained by the set relation illustrated:
H=h ' cos θ (13)
Relative error δ can be obtainedhAre as follows:
By formula (14) it is found that this error also belongs to systematic error, mounting inclination angle degree error is smaller, and relative error is got over
It is small, so to guarantee that target plane and spaning middle section are vertical, as far as possible during the installation process to reduce this error.
Referring to Figure 10, the single hole across footpath of Very Large Bridge has generally been above 100 meters, therefore is mounted on the target of span centre and swashs
The distance of light a reference source is also longer, if distance is l, it is assumed that laser datum source is in the measurements since external influence produces drift angle
α and displacement δd(base position drift error), then since reference laser beam drifts in the actual displacement generated on target surface are as follows:
δp=δd±l×tanα≤|δd|+l×tanα (15)
Known to formula (15) when α and l increases, this error increases.According to error propagation principles when l is larger, α variation
The amount of very little can also cause δpA biggish variation is generated, therefore, influence of the latter error to error is most important.It is setting
High-precision two-dimentional dip measuring device is mounted in meter on laser generator (laser) ontology, since l is in specific bridge
Therefore Liang Zhongwei by setup parameter it is known that can eliminate the influence of this error.
Referring to Figure 11, atmospheric turbulance influences laser beam to be that atmospheric turbulance phenomenon can interfere the aerial biography of light beam
Defeated, especially laser can be obvious with influence when receiving the distance between target farther out, causes laser facula on target
Occurs phenomena such as hot spot shake, scintillation, beam spread when imaging.When turbulent flow size L is much larger than laser beam spot sizes D,
It will lead to the phenomenon that laser generates offset in communication process, the laser spot position on target is made to drift about；Assuming that laser
Propagation path is uniform when propagating in an atmosphere, composes turbulent flow according to Kolmogrov, caused laser beam shake may be expressed as:
WhereinFor atmospheric refraction structural constant, unit is m-2/3, R is initial transmissions radius；D is transmission range.Light beam
The degree of drift can be indicated with the difference of two squares of hot spot center of gravity.
Intelligent target is demarcated on high-precision two-dimensional optical platform, laser is placed on Intelligent target when calibration
Preceding fixation adjusts emergent pupil focal length, so that spot size about 3mm, model machine is placed on two-dimentional digital display mobile platform, respectively along
Both vertically as well as horizontally moving target mark, platform move 2mm every time, calculate spot center coordinate using gravity model appoach.
2mm is moved along a direction is every, measures the pixel number moved on CCD, takes 5 groups therein as shown in table 1, utilizations
Data therein are averaged, and can acquire k using formula (9) and (10)xd=2.499；kyd=2.304.
1. pixel displacement value of table
Then calibration coefficient k caused by 0-45 ° of deflection angle is tilted in measurement target dronexd、kydBetween error.
Embodiment 2
Compared with Example 1, the hot spot target signal of ccd sensor is acquired first and is translated into digital signal, so
By DM642 chip, asynchronous communication circuit, it is transmitted to single-chip microcontroller STC12C5A60S2, is then carried out through wireless communication line remote
Number of passes receives the data image signal for calculating deflection of bridge span information according to transmission, by computer terminal.
Claims (17)
1. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus, it is characterised in that: the detection device include cabinet (7) with
And it is set to the transmission-type target irradiated for receiving laser light source on cabinet (7), target figure is provided in the cabinet (7)
As acquisition and processing module, target image acquisition and processing module include filter unit, camera lens (5), ccd image acquisition unit,
The image processing unit of laser spot position, filter unit are set in video decoding unit and for identification target image
It penetrates between formula target and camera lens (5), ccd image acquisition unit is set on the transmission-type target imaging optical path of camera lens (5), video
Decoding unit is connected with described image processing unit and ccd image acquisition unit respectively.
2. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: described
It penetrates formula target and is selected from diffusing panel.
3. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: the filter
Light unit is selected from the narrow band filter (2) that central wavelength is 650nm.
4. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: described
Ccd image acquisition unit is selected from ultra low illumination camera.
5. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: the view
Frequency decoding unit includes the chip for the signal of ccd sensor to be converted to digital signal.
6. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: the figure
As processing unit includes the dsp chip for resolving the two-dimensional coordinate information of laser spot center on transmission-type target image.
7. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: the inspection
Surveying device further includes human-computer interaction and communication module, and human-computer interaction and communication module include being set in cabinet (7)
STC12C5A60S2 chip and the people's circle interactive interface being connected with STC12C5A60S2 chip and the nothing being set on cabinet (7)
Line communication module, the target image acquisition and processing module are connected with STC12C5A60S2 chip.
8. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: the inspection
Surveying device further includes the remote monitoring module communicated with target image acquisition and processing module.
9. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 1, it is characterised in that: described to swash
The laser and transmission-type target that radiant issues are perpendicular.
10. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus, it is characterised in that: the detection device includes cabinet (7)
And it is set to the transmission-type target irradiated for receiving laser light source on cabinet (7), target is provided in the cabinet (7)
Image Acquisition and processing module, target image acquisition and processing module include filter unit, camera lens (5), ccd image acquisition unit
And video decoding unit, filter unit are set between transmission-type target and camera lens (5), ccd image acquisition unit is set to
On the transmission-type target imaging optical path of camera lens (5), video decoding unit is connected with ccd image acquisition unit.
11. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 10, it is characterised in that: described
Transmission-type target is selected from diffusing panel.
12. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 10, it is characterised in that: described
Filter unit is selected from the narrow band filter (2) that central wavelength is 650nm.
13. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 10, it is characterised in that: described
Ccd image acquisition unit is selected from ultra low illumination camera.
14. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 10, it is characterised in that: described
Video decoding unit includes the chip for the signal of ccd sensor to be converted to digital signal.
15. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 10, it is characterised in that: described
Detection device further includes human-computer interaction and communication module, and human-computer interaction and communication module include being set in cabinet (7)
STC12C5A60S2 chip and the people's circle interactive interface being connected with STC12C5A60S2 chip and the nothing being set on cabinet (7)
Line communication module, the target image acquisition and processing module are connected with STC12C5A60S2 chip.
16. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 10, it is characterised in that: described
Detection device further includes the remote monitoring module communicated with target image acquisition and processing module.
17. a kind of laser datum bridge single-point amount of deflection vision inspection apparatus according to claim 10, it is characterised in that: described
The laser and transmission-type target that laser light source issues are perpendicular.
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| CN110500989A (en) * | 2019-08-29 | 2019-11-26 | 郑州大学 | A kind of girder bridge deflection test error control method |
| CN111537127A (en) * | 2020-05-13 | 2020-08-14 | 西北工业大学 | Full-range calibration method of X-ray stress gauge |
| CN111665006A (en) * | 2020-06-06 | 2020-09-15 | 河南交院工程技术有限公司 | Deflection measurement method of bridge |
| CN111895963A (en) * | 2020-06-30 | 2020-11-06 | 同恩(上海)工程技术有限公司 | Small deformation member deflection monitoring method and system based on rigidity fitting and storage medium |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500989A (en) * | 2019-08-29 | 2019-11-26 | 郑州大学 | A kind of girder bridge deflection test error control method |
| CN111537127A (en) * | 2020-05-13 | 2020-08-14 | 西北工业大学 | Full-range calibration method of X-ray stress gauge |
| CN111665006A (en) * | 2020-06-06 | 2020-09-15 | 河南交院工程技术有限公司 | Deflection measurement method of bridge |
| CN111665006B (en) * | 2020-06-06 | 2021-12-14 | 河南交院工程技术集团有限公司 | Deflection measurement method of bridge |
| CN111895963A (en) * | 2020-06-30 | 2020-11-06 | 同恩(上海)工程技术有限公司 | Small deformation member deflection monitoring method and system based on rigidity fitting and storage medium |
| CN113176054A (en) * | 2021-04-19 | 2021-07-27 | 广西交科集团有限公司 | Bridge steel pipe arch rib deformation displacement monitoring system |
| CN113176054B (en) * | 2021-04-19 | 2024-04-26 | 广西交科集团有限公司 | Bridge steel pipe arch rib deformation displacement monitoring system |
| CN113155038A (en) * | 2021-05-11 | 2021-07-23 | 深圳安锐科技有限公司 | Two-dimensional displacement real-time measurement system based on laser spot position identification |
| CN117053718A (en) * | 2023-10-11 | 2023-11-14 | 贵州黔程弘景工程咨询有限责任公司 | Beam bottom linear model generation method based on beam bottom linear measurement |
| CN117053718B (en) * | 2023-10-11 | 2023-12-12 | 贵州黔程弘景工程咨询有限责任公司 | Beam bottom linear model generation method based on beam bottom linear measurement |
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