CN208283293U - Light compensating apparatus for Tunnel testing image capture apparatus - Google Patents
Light compensating apparatus for Tunnel testing image capture apparatus Download PDFInfo
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- CN208283293U CN208283293U CN201820037201.2U CN201820037201U CN208283293U CN 208283293 U CN208283293 U CN 208283293U CN 201820037201 U CN201820037201 U CN 201820037201U CN 208283293 U CN208283293 U CN 208283293U
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Abstract
The utility model proposes a kind of light compensating apparatus for Tunnel testing image capture apparatus, which includes several light filling units；Several described light filling units are evenly distributed on bracket, and the bracket is parallel with tunnel section；The light source group and image capture apparatus installation are on the bracket；The light filling unit includes light source group and image capture apparatus, and the side of described image acquisition equipment is arranged in the light source group；The light source group is equipped with lampshade；The light filling unit is in the distribution of 1/4 circular arc on the bracket.Illumination and overexposure problem when the illumination light compensating apparatus for being used for Tunnel testing image capture apparatus can effectively solve at present under tunnel environment to image capture.
Description
Technical field
The present invention relates to one kind to be 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 technique
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. that often detect discovery in time and processing tunnel, currently, the structure detection of subway tunnel
Rely primarily on artificial detection means, artificial detection speed is slow, low efficiency, 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 using 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 be it is fixed, i.e., no matter brighter or than under darker ambient brightness, light filling intensity is all
It is identical, it will lead to gradation degree in this way and contrast be bad, 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.
Summary of the invention
The invention proposes one kind for Tunnel testing image capture apparatus illumination light compensating apparatus, can effectively solve at present
Illumination and overexposure problem when under tunnel environment to image capture.
In order to solve the above-mentioned technical problem, the technical scheme is that this is used for Tunnel testing image capture apparatus
Illumination light compensating apparatus includes the illumination light filling unit that several are used for Tunnel testing image capture apparatus；Several are described for tunnel
The illumination light filling unit of road detection image acquisition equipment is evenly distributed on bracket, and the bracket is parallel with tunnel section；It is described
Light source group and image capture apparatus installation are on the bracket；Light filling unit includes light source group and image capture apparatus, the light
The side of described image acquisition equipment is arranged in source group；The light source group is equipped with lampshade；The light filling unit is in the bracket
It is upper to be distributed in 1/4 circular arc, and the light filling unit can be rotated along the bracket on the bracket, pass through fixing lock after rotation
Latched position.By adopting the above technical scheme, image is shot in tunnel needs camera to have very high sensitivity, so needing using big
The high-sensitivity camera of pixel；In the horizontal direction, the side of described image acquisition equipment is arranged in light source group, by installing
Lampshade, after the light that the light source of light source group can be made to emit projects tunnel wall, the light being reflected back enters camera, in camera sense
What is formed on optical chip is the photo of brightness uniformity, no local excessive exposure；It solves under dark condition, when camera shoots photo
Exposure problems；Several light source groups are arranged according to certain tilt angle, and tilt angle is calculated according to object distance, visual field
Determining value, while lampshade shape is rationally designed, so that the overlapping region of formation is just slightly larger than after light beam projects tunnel wall
The field range of video camera；The part that illumination intersects is exactly most bright part, then is the region of mutually confidential shooting, to realize institute
It takes a picture no overexposure phenomenon.
Further improvement lies in that the bracket includes first support and second support, the first support and second support
It is arranged in parallel, the light source group is mounted in the first support, and described image acquisition equipment is installed on the secondary support bracket.
Further improvement lies in that the front side or rear side of described image acquisition equipment is arranged in the light source group；The light source
Group includes at least one light source.The front side or rear side that image capture apparatus is arranged in light source group can be made to the overlapping region of light
It is more overlapped, light source will not be wasted, the energy can be saved.
Further improvement lies in that the light source group and the setting of described image acquisition equipment are in the same horizontal line.Work as light source
When group is comprising a light source, then light source group and image capture apparatus are arranged in the 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；It is connected between the upper opening and 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% mirror surface is anti-
It penetrates, 30% diffusing reflection, reflection diffusion full-shape is 50 °.
Further improvement lies in that the light source group tilts 10 ~ 50 ° to described image acquisition equipment direction.Light source group is to figure
As tilting 10 ~ 50 ° in terms of acquisition equipment, it can preferably realize that light projection enters image to the light that tunnel wall back reflection returns and catches
Device is obtained, what is formed on image capture apparatus sensitive chip is the photo of brightness uniformity, no local excessive exposure；It solves black
Under dark condition, image capture apparatus shoots exposure problems when photo.
Further improvement lies in that the front side or rear side of the second support is arranged in the first support；Described image is caught
Device is obtained with the second support in being detachably connected, the light source group and the first support are in be detachably connected.
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 light source groups according to certain inclination angle
Degree arrangement, the value for the determination that tilt angle is calculated according to object distance, visual field, while lampshade shape is rationally designed, so that light beam
After projecting tunnel wall, the overlapping region of formation is just slightly larger than the field range of video camera；The part that illumination intersects is exactly most
Bright part, while brightness uniformity, then be the region of mutually confidential shooting, to realize no overexposure phenomenon of taking a picture.
Detailed description of the invention
Fig. 1 is the structure under the illumination light filling unit 1.6m visual field for Tunnel testing image capture apparatus of the invention
Figure；
Fig. 2 is the structure chart of the lampshade of the illumination light filling unit for Tunnel testing image capture apparatus of the invention；
Fig. 3 is structure chart of the embodiment of the present invention 3 for the illumination light compensating apparatus of Tunnel testing image capture apparatus；
Fig. 4 is image capture of the embodiment of the present invention 4 for the illumination light compensating apparatus of Tunnel testing image capture apparatus
Structure chart of the device on bracket；
Fig. 5 is the camera imaging schematic diagram of the illumination light compensating apparatus for Tunnel testing image capture apparatus of the invention；
Fig. 6 is that light source group of the embodiment of the present invention 5 for the illumination light compensating apparatus of Tunnel testing image capture apparatus exists
Structure chart on bracket；
Wherein: 1- light source group；2- image capture apparatus；3- lampshade；301- upper opening；302- under shed；303- arc panel；
4- bracket；401- first support；402- second support；403- mounting rod.
Specific embodiment
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: this is used for the illumination light filling unit of Tunnel testing image capture apparatus, including a light source group 1 and figure
As acquisition equipment 2, the side of described image acquisition equipment 2 is arranged in the light source group 1；Lampshade is installed in the light source group 1
3；The light source group 1 and the setting of described image acquisition equipment 2 are in the same horizontal line；The light source group 1 includes at least one light
Source；The light source is all made of LED light, and the lampshade 3 is reflector, and the lampshade 3 includes upper opening 301 and under shed 302, institute
It is rectangular for stating upper opening 301 and under shed 302；It is connected between the upper opening 301 and under shed 302 by arc panel 302
It connects；The light source is fixed in upper opening 301, is passed light through under shed 302 and is projected outward；The light source group 1 is to described image
2 direction of acquisition equipment tilts 10 ~ 50 °, and wherein image capture apparatus uses camera, and shooting image needs camera to have very high in tunnel
Sensitivity, so needing the high-sensitivity camera using big pixel；Lampshade 3 is aluminum reflector, and the inner surface of lampshade is plating
Aluminium film, after anodic oxidation and matte management, reflectivity reaches 85% or more on surface, wherein 70% mirror-reflection, 30% is unrestrained anti-
It penetrates, reflection diffusion full-shape is 50 °, and the under shed 302 of lampshade is having a size of 96*90mm, between upper opening 301 and under shed 302
Distance is 96mm；In the horizontal direction, the front side of described image acquisition equipment 2 is arranged in light source group 1, by installing upper lamp shade 3,
After the light that the light source of light source group 1 can be made to emit projects tunnel wall, the light being reflected back enters camera, in the photosensitive core of camera
What on piece was formed is the photo of brightness uniformity, no local excessive exposure；It solves under dark condition, camera shoots exposure when photo
Optical issue.
Embodiment 2: difference from Example 1 is that the rear side of described image acquisition equipment 2 is arranged in light source group 1；Tool
Body: this is used for the illumination light filling unit of Tunnel testing image capture apparatus, including a light source group 1 and image capture apparatus 2,
The side of described image acquisition equipment 2 is arranged in the light source group 1；Lampshade 3 is installed in the light source group 1；The light source group 1
In the same horizontal line with the setting of described image acquisition equipment 2；The light source group 1 includes at least one light source；The light source is equal
Using LED light, the lampshade 3 is reflector, and the lampshade 3 includes upper opening 301 and under shed 302,301 He of upper opening
Under shed 302 is rectangular；It is connected between the upper opening 301 and under shed 302 by arc panel 302；The light source is solid
It is scheduled in upper opening 301, passes light through under shed 302 and project outward；The light source group 1 is to 2 direction of described image acquisition equipment
10 ~ 50 ° of inclination, wherein image capture apparatus uses camera, and shooting image needs camera to have very high sensitivity in tunnel, so
Need the high-sensitivity camera using big pixel；Lampshade 3 is aluminum reflector, and the inner surface of lampshade is aluminizer, and surface is passed through
After anodic oxidation and matte management, reflectivity reaches 85% or more, wherein 70% mirror-reflection, 30% diffusing reflection, reflection diffusion full-shape
It is 50 °, for the under shed 302 of lampshade having a size of 96*90mm, the distance between upper opening 301 and under shed 302 are 96mm；In water
Square upwards, the rear side of described image acquisition equipment 2 is arranged in light source group 1, by install upper lamp shade 3, light source group 1 can be made
After the light of light source transmitting projects tunnel wall, the light being reflected back enters camera, and what is formed on camera sensitive chip is bright
Spend uniform photo, no local excessive exposure；It solves under dark condition, camera shoots exposure problems when photo.
Embodiment 3: using the light filling unit of embodiment 1, this is used for the illumination light filling dress of Tunnel testing image capture apparatus
Set the illumination light filling unit that Tunnel testing image capture apparatus is used for including 7；Several described Tunnel testing images that are used for are caught
The illumination light filling unit for obtaining device is evenly distributed on bracket 4, and the bracket 4 is parallel with tunnel section；It is arranged on the bracket 4
There are several mounting rods 403, perpendicular to the section in tunnel, the bracket 4 includes first support in the direction that the mounting rod 403 is arranged
401 and second support 402, the first support 401 front side of the second support is set；The light source group 1 is mounted on institute
It states in first support 401, described image acquisition equipment 2 is mounted in the second support 402；Described image acquisition equipment 2 with
By mounting rod 403 and bolt in being detachably connected, the light source group 1 passes through the second support 402 with the fore-stock 401
Mounting rod 403 and bolt are in be detachably connected；The quantity of the illumination light filling unit for Tunnel testing image capture apparatus
It is 7, correspondingly, the quantity of described image acquisition equipment is 7；Described image acquisition equipment 2 is camera；It is total in camera side
11 light sources are set altogether；The light source is all made of LED light, and LED light is stroboscopic lamp, flash time 80us, 20Hz；Image capture
Device is 2.2m with a distance from tunnel wall, several light source groups 1 are arranged according to certain tilt angle, and tilt angle is according to object
Value away from the determination that, visual field is calculated, while lampshade shape is rationally designed, so that after light beam projects tunnel wall, formation
Overlapping region is just slightly larger than the field range of video camera；The part that illumination intersects is exactly most bright part, then is mutually confidential bat
The region taken the photograph；In shooting process, over-exposed band is because of reflection, and brightness low area is because of diffusion；Therefore it is being designed for
When the illumination light filling unit of Tunnel testing image capture apparatus, increase lamp and camera distance and inclination angle, makes the whole into camera
For diffused light, reflective tape is outside field range, thus realize that is formed on camera sensitive chip is the photo of brightness uniformity, it is real
Now exposed without local excessive.
Embodiment 4: using the light filling unit of embodiment 2, this is used for the illumination light filling dress of Tunnel testing image capture apparatus
Set the illumination light filling unit that Tunnel testing image capture apparatus is used for including 3；Several described Tunnel testing images that are used for are caught
The illumination light filling unit for obtaining device is evenly distributed on bracket 4, and the bracket 4 is parallel with tunnel section；The light filling unit exists
It is distributed on the bracket 4 in 1/4 circular arc, and the light filling unit can rotate on the bracket 4 along the bracket 4, rotation
Pass through fixing lock latched position afterwards；Several mounting rods 403 are provided on the bracket 4, the direction that the mounting rod 403 is arranged is hung down
Directly in the section in tunnel, the bracket 4 includes first support 401 and second support 402, and the first support 401 is arranged in institute
State the front side of second support；The light source group 1 is mounted in the first support 401, and described image acquisition equipment 2 is mounted on institute
It states in second support 402；Described image acquisition equipment 2 and the second support 402 pass through mounting rod 403 and bolt in detachable
Connection, the light source group 1 are in be detachably connected by mounting rod 403 and bolt with the fore-stock 401；It is described to be examined for tunnel
The quantity of the illumination light filling unit of altimetric image acquisition equipment is 3, and correspondingly, the quantity of described image acquisition equipment is 3；Institute
Stating image capture apparatus 2 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 light source groups 1 are arranged according to certain tilt angle, tilt angle
According to the value for the determination that object distance, visual field are calculated, while lampshade shape is rationally designed, so that after light beam projects tunnel wall,
The overlapping region of formation is just slightly larger than the field range of video camera；The part that illumination intersects is exactly most bright part, then is phase
The region of confidential shooting；In shooting process, over-exposed band is because of reflection, and brightness low area is because of diffusion；Therefore it is setting
When meter is used for the illumination light filling unit of Tunnel testing image capture apparatus, increase lamp and camera distance and inclination angle, makes to enter camera
All diffused lights, reflective tape is outside field range, to realize that formed on camera sensitive chip is brightness uniformity
Photo is realized and is exposed without local excessive.
Embodiment 5: using the light filling unit of embodiment 2, this is used for the illumination light filling dress of Tunnel testing image capture apparatus
Set the illumination light filling unit that Tunnel testing image capture apparatus is used for including 5；Several described Tunnel testing images that are used for are caught
The illumination light filling unit for obtaining device is evenly distributed on bracket 4, and the bracket 4 is parallel with tunnel section；The light filling unit exists
It is distributed on the bracket 4 in 1/4 circular arc, and the light filling unit can rotate on the bracket 4 along the bracket 4, rotation
Pass through fixing lock latched position afterwards；Several mounting rods 403 are provided on the bracket 4, the direction that the mounting rod 403 is arranged is hung down
Directly in the section in tunnel, the bracket 4 includes first support 401 and second support 402, and the first support 401 is arranged in institute
State the front side of second support；The light source group 1 is mounted in the first support 401, and described image acquisition equipment 2 is mounted on institute
It states in second support 402；Described image acquisition equipment 2 and the second support 402 pass through mounting rod 403 and bolt in detachable
Connection, the light source group 1 are in be detachably connected by mounting rod 403 and bolt with the fore-stock 401；It is described to be examined for tunnel
The quantity of the illumination light filling unit of altimetric image acquisition equipment is 5, and correspondingly, the quantity of described image acquisition equipment is 5；Institute
Stating image capture apparatus 2 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 light source groups 1 are arranged according to certain tilt angle, tilt angle
According to the value for the determination that object distance, visual field are calculated, while lampshade shape is rationally designed, so that after light beam projects tunnel wall,
The overlapping region of formation is just slightly larger than the field range of video camera；The part that illumination intersects is exactly most bright part, then is phase
The region of confidential shooting；In shooting process, over-exposed band is because of reflection, and brightness low area is because of diffusion；Therefore it is setting
When meter is used for the illumination light filling unit of Tunnel testing image capture apparatus, increase lamp and camera distance and inclination angle, makes to enter camera
All diffused lights, reflective tape is outside field range, to realize that formed on camera sensitive chip is brightness uniformity
Photo is realized 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 0.4mm 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 4120*2830, 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；The range that 7 cameras need to shoot is 12m, and the field range of an average camera is wanted
Greater than 2m；The chip size 24.83mm*26.88mm of camera；Relationship between viewing field of camera, distance and focal length as shown in figure 4,
Lens focus, 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- subject is wide
Degree；Distance of the L- subject to camera lens；H- picture altitude refers to the image height on subject to CCD；H- subject is high
Degree；When L is constant, and H or W increase, f becomes smaller, and when H or W are constant, and L increases, f increases.
Guaranteeing that precision (on the basis of details is differentiated to 0.4mm), calculates focal length, select camera lens.
| Distance (D) | 2.2m |
| Visual field size/field angle | 2.2m/42º |
| Focal length | 24.9mm |
| Precision | 0.329mm |
If selecting 24mm camera lens 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 lens, can reach single camera visual field size is 2.4 meters, it is only necessary to which 6 cameras can be completed
Shooting.
Quantity about LED light source: it in order to take clearly image in dim environment, needs sufficiently strong
Illumination light, therefore select 22 illuminations be respectively symmetrically erected at camera both sides, illuminate the part (most bright region) of intersection
It is exactly the region of mutually confidential shooting；If 16 illuminations of every side are evenly distributed, every 12 degree of a set of illuminations of arrangement, the hair of illumination
Scattered angle is about 40 degree, so the illumination for being intended to shooting area is all superimposed out, can satisfy the requirement to illumination intensity.Each view
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, 43 ° of viewing field of camera angle, lampshade visual angle is designed as slightly larger than 43 °；In horizontal direction, 32 ° of viewing field of camera angle,
Lampshade visual angle is designed as slightly larger than 32 °.Due to the decaying of light be it 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 is exactly light beam
Energy；Attenuation coefficient is about 10-6/km, 20 ~ 20cm of the depth of field to light in air, therefore optical attenuation is negligible；Wherein LED light
COB light source light-emitting surface having a size of 60*60mm, the maximum power of output is 1000W, and bright maximum intensity can reach light-emitting surface and be
22000lm must trigger mode 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 in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of light compensating apparatus for Tunnel testing image capture apparatus, which is characterized in that including several light filling units；Institute
Stating light filling unit includes light source group and image capture apparatus, and the side of described image acquisition equipment is arranged in the light source group；If
The dry light filling unit is evenly distributed on bracket, and the bracket is parallel with tunnel section；The light source group and described image
Acquisition equipment is installed on the bracket；The light source group is equipped with lampshade；The light filling unit is in 1/4 circle on the bracket
Arc distribution；The light filling unit rotation connection is on the bracket；And the light filling unit can be on the bracket along described
Bracket rotation, passes through fixing lock latched position after rotation；The bracket includes first support and second support, the first support
It is arranged in parallel with second support, the light source group is mounted in the first support, and described image acquisition equipment is mounted on second
On bracket；The front side or rear side of described image acquisition equipment is arranged in the light source group；The light source group includes at least one
Light source.
2. the light compensating apparatus according to claim 1 for Tunnel testing image capture apparatus, which is characterized in that the light
Source group and the setting of described image acquisition equipment are in the same horizontal line.
3. the light compensating apparatus according to claim 2 for Tunnel testing image capture apparatus, which is characterized in that the lamp
Cover is reflector, and the lampshade includes upper opening and under shed, and the upper opening and under shed are rectangular；The upper opening with
It is connected between under shed by arc panel.
4. the light compensating apparatus according to claim 3 for Tunnel testing image capture apparatus, which is characterized in that the light
Source group tilts 10~50 ° to described image acquisition equipment direction.
5. the light compensating apparatus according to claim 4 for Tunnel testing image capture apparatus, which is characterized in that described
The front side or rear side of the second support is arranged in one bracket；Described image acquisition equipment is in detachably to connect with the second support
It connects, the light source group and the first support are in be detachably connected.
6. the light compensating apparatus according to claim 5 for Tunnel testing image capture apparatus, which is characterized in that the photograph
The quantity of visible subsidy light unit is 3~20, and correspondingly, the quantity of described image acquisition equipment is 3~20.
7. the light compensating apparatus according to claim 6 for Tunnel testing image capture apparatus, which is characterized in that the figure
As acquisition equipment is camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820037201.2U CN208283293U (en) | 2018-01-10 | 2018-01-10 | Light compensating apparatus for Tunnel testing image capture apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820037201.2U CN208283293U (en) | 2018-01-10 | 2018-01-10 | Light compensating apparatus for Tunnel testing image capture apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4043693A4 (en) * | 2019-10-08 | 2023-10-11 | Shanghai Oriental Maritime Engineering Technology Co., Ltd. | Image acquisition device for tunnel inspection, tunnel inspection system, and tunnel inspection method |
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- 2018-01-10 CN CN201820037201.2U patent/CN208283293U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4043693A4 (en) * | 2019-10-08 | 2023-10-11 | Shanghai Oriental Maritime Engineering Technology Co., Ltd. | Image acquisition device for tunnel inspection, tunnel inspection system, and tunnel inspection method |
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Effective date of registration: 20220329 Address after: 055350 west of Fuyang street and south of Baoxin logistics in Longyao County Economic Development Zone (North District), Xingtai City, Hebei Province Patentee after: Kuanyan (Hebei) Intelligent Equipment Co.,Ltd. Address before: No. 5014-112, floor 5, No. 36, Haidian Street, Haidian District, Beijing 100080 Patentee before: Kuanyan (Beijing) Technology Development Co.,Ltd. |
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Denomination of utility model: Complementary light device for tunnel detection image capture device Effective date of registration: 20220805 Granted publication date: 20181225 Pledgee: Hebei Xingtai Rural Commercial Bank Co., Ltd. Longyao Sub-branch Pledgor: Kuanyan (Hebei) Intelligent Equipment Co.,Ltd. Registration number: Y2022320000438 |
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Date of cancellation: 20230829 Granted publication date: 20181225 Pledgee: Hebei Xingtai Rural Commercial Bank Co.,Ltd. Longyao Sub branch Pledgor: Kuanyan (Hebei) Intelligent Equipment Co.,Ltd. Registration number: Y2022320000438 |
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Denomination of utility model: A supplementary light device for tunnel detection image capture device Effective date of registration: 20230901 Granted publication date: 20181225 Pledgee: Hebei Xingtai Rural Commercial Bank Co.,Ltd. Longyao Sub branch Pledgor: Kuanyan (Hebei) Intelligent Equipment Co.,Ltd. Registration number: Y2023320000444 |