CN207802160U - Illumination light compensating apparatus for Tunnel testing - Google Patents
Illumination light compensating apparatus for Tunnel testing Download PDFInfo
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- CN207802160U CN207802160U CN201820037062.3U CN201820037062U CN207802160U CN 207802160 U CN207802160 U CN 207802160U CN 201820037062 U CN201820037062 U CN 201820037062U CN 207802160 U CN207802160 U CN 207802160U
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Abstract
It includes illumination light filling units that several are used for Tunnel testing image capture apparatus that the utility model, which discloses a kind of illumination light compensating apparatus for Tunnel testing image capture apparatus,；Several described illumination light filling units for Tunnel testing image capture apparatus are evenly distributed on holder, the holder includes fore-stock, middle holder and after-poppet, and the fore-stock, middle holder and after-poppet are sequentially being arranged in order each parallel to tunnel section and before, during and after；The first light source group is mounted on the fore-stock, and the second light source group is mounted on the after-poppet, and described image acquisition equipment is mounted on the middle holder, and the light filling unit is in that 1/4 circular arc is distributed on the bracket；The light filling unit includes first light source group, second light source group and image capture apparatus, and the first light source group is separately positioned on the both sides of described image acquisition equipment with second light source group；It is mounted on lampshade in the first light source group and the second light source group.
Description
Technical field
The present invention relates to one kind being used for Tunnel testing technical field, more particularly to a kind of for Tunnel testing image capture dress
The illumination light compensating apparatus set.
Background technology
In recent years, with the fast development of urban construction, the continuous expansion of city size, city underground traffic is peculiar with its
Advantage be rapidly developed, subway tunnel to operation security require it is high, in subway tunnel operation management and maintenance processes,
The fault of construction such as crackle, percolating water etc. for finding and handling tunnel in time is often detected, currently, the structure detection of subway tunnel
Rely primarily on artificial detection means, artificial detection speed is slow, efficiency is low, more and more inadaptable modern subway tunnel detection window when
Between short feature therefore cause the attention of various countries to the research of subway tunnel structure defect fast automatic detecting technology.
When for carrying out fault of construction detection in subway tunnel, using based on camera-shooting scannings such as camera, lasers
Measuring technique, and high-definition image is obtained, by the model calculation to image coordinate to space coordinate, to accurately determine tunnel
The defects of leakage, cracking.And at present the photographic devices such as existing video camera or digital camera when shooting, can utilize light compensating lamp into
Row luminance compensation.The light compensating lamp can be always on when photographic device is photographed, to increase the brightness of environment.But it mends
The luminous intensity that light lamp is exported is fixed, i.e., no matter brighter or than under dark ambient brightness, light filling intensity is all
It is identical, gradation degree and contrast can be caused bad in this way, user's expected effect cannot be reached, seriously affected
The quality of image absorbed.Especially in this dark surrounds in tunnel, and it is even more important for the light filling of image capture apparatus.
Therefore, it is necessary to develop a kind of illumination light filling unit and light compensating apparatus for Tunnel testing image capture apparatus.
Invention content
The present invention proposes one kind and illuminating light compensating apparatus for Tunnel testing image capture apparatus, can effectively solve at present
Illumination when under tunnel environment to image capture and overexposure problem.
In order to solve the above-mentioned technical problem, the technical proposal of the invention is realized in this way：This is used for Tunnel testing image
The illumination light compensating apparatus of acquisition equipment includes the illumination light filling unit that several are used for Tunnel testing image capture apparatus；Several
The illumination light filling unit for Tunnel testing image capture apparatus is evenly distributed on holder；The holder includes preceding branch
Frame, middle holder and after-poppet, the fore-stock, middle holder and after-poppet are each parallel to tunnel section and before, during and after suitable
Sequence is arranged in order；The first light source group is mounted on the fore-stock, and the second light source group is mounted on the after-poppet,
Described image acquisition equipment is mounted on the middle holder, and the light filling unit is in that 1/4 circular arc is distributed on the bracket；It is described
Light filling unit includes first light source group, second light source group and image capture apparatus, the first light source group and second light source component
It is not arranged in the both sides of described image acquisition equipment；It is mounted on lampshade in the first light source group and the second light source group.
Shooting image using above-mentioned technical proposal, in tunnel needs camera to have very high sensitivity, so needing the height using big pixel
Sensitivity camera；In the horizontal direction, first light source group is arranged with second light source group in the both sides of described image acquisition equipment, leads to
Installation upper lamp shade is crossed, the light source of first light source group and the light of the light source transmitting of second light source group can be made to project tunnel wall
Afterwards, the light being reflected back enters camera, and what is formed on camera sensitive chip is the photo of brightness uniformity, and no local excessive exposes
Light；It solves under dark condition, camera shoots exposure problems when photo；Several first light source groups and second light source group according to
Certain angle of inclination arrangement, the value for the determination that angle of inclination is calculated according to object distance, visual field, while rationally designing lamp cover shaped
Shape so that after light beam projects tunnel wall, the overlapping region of formation is just slightly larger than the field range of video camera；What illumination intersected
Part is exactly most bright part, then is the region of mutually confidential shooting, to realize no overexposure phenomenon of taking a picture.
Further improvement lies in that described image acquisition equipment is in be detachably connected with the middle holder, the first light source
Group is in be detachably connected with the after-poppet with the fore-stock and the second light source group.Such setting is both so that image
The angle and first light source group and the angle of second light source group of acquisition equipment can be adjusted, while convenient for the repair of spare and accessory parts
With replacement.
Further improvement lies in that the first light source group is symmetricly set on described image acquisition equipment with second light source group
Both sides；The first light source group and the second light source group include at least one light source.By first light source group and second light source
The both sides that group is symmetricly set on image capture apparatus can be such that the overlapping region of light more overlaps, and will not waste light source, Ke Yijie
Save the energy.
Further improvement lies in that the first light source group, the second light source group and the setting of described image acquisition equipment exist
In same horizontal line.
Further improvement lies in that the lampshade is reflector, the lampshade includes upper opening and under shed, the upper opening
It is rectangular under shed；The upper opening is connected between under shed by arc panel.Lampshade is aluminum reflector, lampshade
Inner surface be aluminizer, after anodic oxidation and matte management, reflectivity reaches 85% or more on surface, wherein 70% minute surface is anti-
It penetrates, 30% diffusing reflection, reflection diffusion full-shape is 50 °.
Further improvement lies in that the first light source group and the second light source group are to described image acquisition equipment direction
Tilt 10 ~ 50 °.10 ~ 50 ° are tilted in terms of image capture apparatus by the way that first light source group and second light source group is arranged, it can be with
Preferably realize that the light that light projection is returned to tunnel wall back reflection enters image capture apparatus, in image capture apparatus sensitive chip
Upper formation be brightness uniformity photo, the exposure of no local excessive；It solves under dark condition, image capture apparatus shoots photo
When exposure problems.
Further improvement lies in that the quantity of the illumination light filling unit for Tunnel testing image capture apparatus is 3 ~ 20
A, correspondingly, the quantity of described image acquisition equipment is 3 ~ 20.
Further improvement lies in that described image acquisition equipment is camera.
Compared with prior art, of the invention to have the advantages that：Several first light source groups and second light source group
It is arranged according to certain angle of inclination, the value for the determination that angle of inclination is calculated according to object distance, visual field, while rationally designing lamp
Hood shape so that after light beam projects tunnel wall, the overlapping region of formation is just slightly larger than the field range of video camera；Illumination is handed over
The part of fork is exactly most bright part, while brightness uniformity, then is the region of mutually confidential shooting, to realize no mistake of taking a picture
Degree exposure phenomenon.
Description of the drawings
Fig. 1 is the structure under the illumination light filling unit 1.6m visual fields for Tunnel testing image capture apparatus of the present invention
Figure；
The structure chart of the lampshade of the illumination light filling unit for Tunnel testing image capture apparatus of the positions Fig. 2 present invention；
Fig. 3 is the structure chart of the illumination light compensating apparatus for Tunnel testing image capture apparatus of the present invention；
Fig. 4 is the visual field structure of the camera of the illumination light compensating apparatus for Tunnel testing image capture apparatus of the present invention
Figure；
Wherein：1- first light source groups；2- second light source groups；3- image capture apparatus；4- lampshades；It is open on 401-；402-
Under shed；403- arc panels；5- holders；501- fore-stocks；Holder in 502-；503- after-poppets；504- mounting rods.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present invention figure, technical solution in the embodiment of the present invention carries out clear
Chu, complete description.
Embodiment 1：As Figure 1-Figure 4, the illumination light filling unit for being used for Tunnel testing image capture apparatus, including the
One light source group 1, second light source group 2 and image capture apparatus 3, the first light source group 1 are separately positioned on institute with second light source group 2
State the both sides of image capture apparatus 3；It is mounted on lampshade 4 in the first light source group 1 and the second light source group 2；Described
One light source group 1 is symmetricly set on the both sides of described image acquisition equipment 3 with second light source group 2；It is the first light source group 1, described
Second light source group 2 and the setting of described image acquisition equipment 3 are in the same horizontal line；The first light source group 1 and second light
Source group 2 includes at least one light source；The light source is all made of LED light, and the lampshade 4 is reflector, and the lampshade 4 includes upper
Opening 401 and under shed 402, the upper opening 401 and under shed 402 are rectangular；The upper opening 401 and under shed 402
Between be connected by arc panel 403；The light source is fixed in opening 401, is passed light through under shed 402 and is projected outward；
The first light source group 1 and the second light source group 2 tilt 10 ~ 50 °, wherein image to 3 direction of described image acquisition equipment
Acquisition equipment uses camera, and shooting image in tunnel needs camera to have very high sensitivity, so needing the height using big pixel
Sensitivity camera；Lampshade 4 is aluminum reflector, and the inner surface of lampshade is aluminizer, and anodic oxidation and matte management are passed through in surface
Afterwards, reflectivity reaches 85% or more, wherein 70% mirror-reflection, 30% diffusing reflection, reflection diffusion full-shape is 50 °, the under shed of lampshade
402 sizes are 96*90mm, and upper opening the distance between 401 and under shed 402 are 96mm；In the horizontal direction, first light source group
1 is symmetricly set on the both sides of described image acquisition equipment 3 with second light source group 2, by installing upper lamp shade 4, can make the first light
After the light source of source group 1 and the light of the light source transmitting of second light source group 2 project tunnel wall, the light being reflected back enters camera,
What is formed on camera sensitive chip is the photo of brightness uniformity, no local excessive exposure；It solves under dark condition, camera is clapped
Take the photograph exposure problems when photo.
Embodiment 2：The illumination light compensating apparatus for being used for Tunnel testing image capture apparatus includes 7 and is used for Tunnel testing figure
As the illumination light filling unit of acquisition equipment；Several described illumination light filling units for Tunnel testing image capture apparatus are uniform
It is distributed on holder 5, the holder 5 is parallel with tunnel section；Several mounting rods 504, the installation are provided on the holder 5
The direction that bar 504 is arranged includes fore-stock 501, middle holder 502 and after-poppet 503 perpendicular to the section in tunnel, the holder 5,
The fore-stock 501, middle holder 502 and after-poppet 503 are sequentially being arranged successively each parallel to tunnel section and before, during and after
Row；The first light source group 1 is mounted on the fore-stock 501, and the second light source group 2 is mounted on the after-poppet 503,
Described image acquisition equipment 3 is mounted on the middle holder 502；Described image acquisition equipment 3 passes through peace with the middle holder 502
Dress bar 504 and bolt are in be detachably connected, the first light source group 1 and the fore-stock 501 and the second light source group 2 and institute
It is in be detachably connected by mounting rod 504 and bolt to state after-poppet 503；The photograph for Tunnel testing image capture apparatus
The quantity of visible subsidy light unit is 7, and correspondingly, the quantity of described image acquisition equipment is 7；Described image acquisition equipment 3 is
Camera；In camera both sides, 32 light sources are set in total；The light source is all made of LED light, and LED light is stroboscopic lamp, and flash time is
80us, 20Hz；Image capture apparatus is 2.2m with a distance from tunnel wall, several first light source groups 1 and second light source group 2 according to
Certain angle of inclination arrangement, the value for the determination that angle of inclination is calculated according to object distance, visual field, while rationally designing lamp cover shaped
Shape so that after light beam projects tunnel wall, the overlapping region of formation is just slightly larger than the field range of video camera；What illumination intersected
Part is exactly most bright part, then is the region of mutually confidential shooting；In shooting process, over-exposed band is because reflection, bright
Low area is spent because of diffusion；Therefore in the illumination light filling unit designed for Tunnel testing image capture apparatus, increase lamp with
Camera distance and inclination angle make all diffused lights into camera, and reflective tape is photosensitive in camera to realize outside field range
What is formed on chip is the photo of brightness uniformity, realizes and is exposed without local excessive.
Embodiment 3：The illumination light compensating apparatus for being used for Tunnel testing image capture apparatus includes 3 and is used for Tunnel testing figure
As the illumination light filling unit of acquisition equipment；Illumination light filling unit described in 3 for Tunnel testing image capture apparatus is uniformly divided
For cloth on holder 5, the holder 5 is arc-shaped in 1/4, and can be rotated along a semi-circular track；It is provided on the holder 5
Several mounting rods 504, the direction that the mounting rod 504 is arranged perpendicular to the section in tunnel, the holder 5 include fore-stock 501,
Middle holder 502 and after-poppet 503, the fore-stock 501, middle holder 502 and after-poppet 503 each parallel to tunnel section and according to
Before, during and after be sequentially arranged in order；The first light source group 1 is mounted on the fore-stock 501, and the second light source group 2 is pacified
On the after-poppet 503, described image acquisition equipment 3 is mounted on the middle holder 502；Described image acquisition equipment 3
With the middle holder 502 by mounting rod 504 and bolt in being detachably connected, the first light source group 1 and the fore-stock 501
It is in be detachably connected by mounting rod 504 and bolt with the second light source group 2 and the after-poppet 503；It is described to be used for tunnel
The quantity of the illumination light filling unit of road detection image acquisition equipment is 3, and correspondingly, the quantity of described image acquisition equipment is 3
Platform；Described image acquisition equipment 3 is camera；The light source is all made of LED light, and LED light is stroboscopic lamp, flash time 80us,
20Hz；Image capture apparatus is 2.2m with a distance from tunnel wall, several first light source groups 1 are with second light source group 2 according to certain
Angle of inclination arrangement, the value for the determination that angle of inclination is calculated according to object distance, visual field, while rationally designing lampshade shape,
So that after light beam projects tunnel wall, the overlapping region of formation is just slightly larger than the field range of video camera；Illuminate the portion intersected
Point it is exactly most bright part, then is the region of mutually confidential shooting；In shooting process, over-exposed band is because of reflection, brightness
Low area is because of diffusion；Therefore in the illumination light filling unit designed for Tunnel testing image capture apparatus, increase lamp and phase
Machine distance and inclination angle make all diffused lights into camera, and reflective tape is outside field range, to realize in the photosensitive core of camera
What on piece was formed is the photo of brightness uniformity, realizes and is exposed without local excessive.
In addition, needing camera to have very high sensitivity the image capture apparatus for shooting image in tunnel, so needing
Using the high-sensitivity camera of big pixel；Precision prescribed reaches 0.5mm when photographic subjects, can be subtracted using the camera of big resolution ratio
The sum of few camera, enormously simplifies the difficulty that equipment mounting frame is set.Thus the camera selected is CL2000, and resolution ratio can reach
To 5120*3840, Pixel size 7um；After camera determines, mirror is selected according to shooting distance, visual field size and required precision
Head；The distance of camera to wall is 2.2m；7 cameras need the ranging from 12m shot, the field range of an average camera to want
More than 2m；The chip size 35.84mm*26.88mm of camera；Relationship between viewing field of camera, distance and focal length is as follows, mirror
Head focal length, visual field size and camera lens are as follows to object distance calculation formula：
f=wL/W； f=hL/H
Wherein：F --- lens focus；W --- picture traverse refers to imaging width of the subject on CCD；W --- quilt
Take the photograph object width；Distance of L --- the subject to camera lens；H --- picture altitude, refer on subject to CCD at image height
Degree；H --- subject height；When L is constant, and H or W increase, f becomes smaller, and when H or W are constant, and L increases, f increases.
Ensureing precision（Details is differentiated to 0.5mm）On the basis of, focal length is calculated, camera lens is selected.
| Distance (D) | 2.2m |
| Visual field size/field angle | 2.2m/53º |
| Focal length | 35.9mm |
| Precision | 0.429mm |
If selecting 35mm camera lenses according to calculating, it is contemplated that need certain fusion band, at least need 7 cameras that could expire
Foot requires.If selecting 28mm camera lenses, can reach single camera visual field size is 2.5 meters, it is only necessary to which 6 cameras can be completed
Shooting.
Quantity about LED light source：In order to take clearly image in dim environment, need sufficiently strong
Illumination light, therefore select 32 illuminations be respectively symmetrically erected at camera both sides, illuminate the part of intersection（Most bright region）
It is exactly the region of mutually confidential shooting；If 16 illuminations per side are evenly distributed, every 13 degree of a set of illuminations of arrangement, the hair of illumination
Scattered angle is about 50 degree, so the illumination for being intended to shooting area is all superimposed out, disclosure satisfy that the requirement to illumination intensity.Each regard
Single field areas is formed by stacking by three-beam, and two rows of lights project the same area by certain inclination angle, and a total of 6 beam is folded
Add；In vertical direction, 54 ° of viewing field of camera angle, lampshade visual angle is designed as being slightly larger than 54 °；In horizontal direction, 42 ° of viewing field of camera angle,
Lampshade visual angle is designed as being slightly larger than 42 °.Since the decaying of light is linear, formula is I '=Ie^ (- μ d), and wherein I is luminous intensity,
μ is the linear attenuation coefficient of light in the medium, and d is light path, and e is the natural logrithm truth of a matter.ε is photon energy, and I ε are exactly light beam
Energy；Attenuation coefficient is about 10-6/km, 20 ~ 30cm of the depth of field to light in air, therefore optical attenuation is negligible；Wherein LED light
COB light source light-emitting surface size be 60*60mm, the maximum power of output is 1000W, and bright maximum intensity can reach light-emitting surface and be
23000lm must trigger pattern in TTL when work, cannot be always on work, therefore be set as dodging frequency lamp since power is excessive, when
When setting flash time is 80us, when flash frequency is 20Hz, COB light source actual power is less than 2W.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to restrict the invention, all essences in the present invention
With within principle, any modification, equivalent substitution, improvement and etc. done should all be included in the protection scope of the present invention god.
Claims (10)
1. a kind of illumination light compensating apparatus for Tunnel testing image capture apparatus, which is characterized in that this is used for Tunnel testing figure
As the illumination light compensating apparatus of acquisition equipment includes the illumination light filling unit that several are used for Tunnel testing image capture apparatus；Illumination
Light filling unit is evenly distributed on holder, and the light filling unit includes first light source group, second light source group and image capture apparatus,
The first light source group is separately positioned on the both sides of described image acquisition equipment with second light source group.
2. the illumination light compensating apparatus according to claim 1 for Tunnel testing image capture apparatus, which is characterized in that institute
It includes fore-stock, middle holder and after-poppet to state holder, and the fore-stock, middle holder and after-poppet each parallel to tunnel section and are pressed
It is sequentially being arranged in order according to before, during and after；The first light source group is mounted on the fore-stock, the second light source group installation
In the rear on holder, described image acquisition equipment is mounted on the middle holder, and the light filling unit is on the bracket
1/4 circular arc is distributed.
3. the illumination light compensating apparatus according to claim 1 or 2 for Tunnel testing image capture apparatus, feature exists
In being mounted on lampshade in the first light source group and the second light source group.
4. the illumination light compensating apparatus according to claim 2 for Tunnel testing image capture apparatus, which is characterized in that institute
It is in be detachably connected that image capture apparatus, which is stated, with the middle holder, the first light source group and the fore-stock and second light
Source group is in be detachably connected with the after-poppet.
5. the illumination light compensating apparatus according to claim 1 for Tunnel testing image capture apparatus, which is characterized in that institute
It states first light source group and is symmetricly set on the both sides of described image acquisition equipment with second light source group；The first light source group and described
Second light source group includes at least one light source.
6. the illumination light compensating apparatus according to claim 2 for Tunnel testing image capture apparatus, which is characterized in that institute
State first light source group, the second light source group and the setting of described image acquisition equipment in the same horizontal line.
7. the illumination light compensating apparatus according to claim 3 for Tunnel testing image capture apparatus, which is characterized in that institute
It is reflector to state lampshade, and the lampshade includes upper opening and under shed, and the upper opening and under shed are rectangular；It is opened on described
Mouth is connected between under shed by arc panel.
8. the illumination light compensating apparatus according to claim 1 for Tunnel testing image capture apparatus, which is characterized in that institute
It states first light source group and the second light source group and tilts 10~50 ° to described image acquisition equipment direction.
9. the illumination light compensating apparatus according to claim 1 for Tunnel testing image capture apparatus, which is characterized in that institute
The quantity for stating the illumination light filling unit for Tunnel testing image capture apparatus is 3~20, correspondingly, described image capture dress
The quantity set is 3~20.
10. the illumination light compensating apparatus according to claim 1 for Tunnel testing image capture apparatus, which is characterized in that
Described image acquisition equipment is camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820037062.3U CN207802160U (en) | 2018-01-10 | 2018-01-10 | Illumination light compensating apparatus for Tunnel testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820037062.3U CN207802160U (en) | 2018-01-10 | 2018-01-10 | Illumination light compensating apparatus for Tunnel testing |
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| Publication Number | Publication Date |
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| CN207802160U true CN207802160U (en) | 2018-08-31 |
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ID=63278571
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| CN201820037062.3U Active CN207802160U (en) | 2018-01-10 | 2018-01-10 | Illumination light compensating apparatus for Tunnel testing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894429A (en) * | 2018-01-10 | 2018-04-10 | 南京火眼猴信息科技有限公司 | A kind of light compensating apparatus for Tunnel testing image capture apparatus |
| CN109581644A (en) * | 2018-11-20 | 2019-04-05 | 中国航发贵州黎阳航空动力有限公司 | One kind being used for the microscopical light filming apparatus of three-dimensional digital |
-
2018
- 2018-01-10 CN CN201820037062.3U patent/CN207802160U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894429A (en) * | 2018-01-10 | 2018-04-10 | 南京火眼猴信息科技有限公司 | A kind of light compensating apparatus for Tunnel testing image capture apparatus |
| CN109581644A (en) * | 2018-11-20 | 2019-04-05 | 中国航发贵州黎阳航空动力有限公司 | One kind being used for the microscopical light filming apparatus of three-dimensional digital |
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