Light supplementing system applied to camera displacement measurement system
The supplementary lighting system, which combines an active light source with a reflector, solves the problem of improper light source selection in photogrammetry, achieves uniform illumination and efficient supplementary lighting over a large field of view, improves the illuminance and flexibility of photogrammetry, and reduces energy consumption and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-20
AI Technical Summary
In existing photogrammetry techniques, the selection of light sources can result in poor light dispersion or inappropriate concentration, leading to poor lighting effects and an inability to achieve uniform illumination over a large field of view. Furthermore, traditional light sources require power connections or wiring, which involves a large amount of work and limits application scenarios and environmental friendliness.
The supplementary lighting system combines an active light source with a reflector. The active light source focuses the light through an optical converging component, while the reflector reflects the light without requiring a power supply. The light source is located in the camera array area, and the reflector is located in the target measurement point area, achieving efficient light convergence and uniform illumination.
It achieves uniform illumination over a large field of view, reduces power connection and wiring workload, improves the illuminance and flexibility of photogrammetry, reduces energy consumption and maintenance costs, and improves supplementary lighting efficiency.
Smart Images
Figure CN224020125U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photographic surveying technical field, concretely relates to a light supplement system for camera displacement measurement system. BACKGROUND
[0002] In photographic surveying, because the actual scene often needs larger field of view coverage, therefore uses multiple cameras to carry out field of view splicing, and constitutes camera array as the perception device of photographic surveying. In photographic surveying, light source plays a vital role to the measurement result and precision. At present, photographic surveying usually adopts the following several light source technologies:
[0003] (1) using passive light emitting mode, that is, illuminating target measuring point through ambient light (sunlight), but this method cannot be used at night, when ambient light is poor, and when ambient light changes significantly;
[0004] (2) using target measuring point (mark) active light emitting mode. This method passes through laying cable to energize target measuring point, then will cause larger wiring workload, and is limited by environment, some engineering conditions do not allow or do not have energization conditions, is not energy-saving and is not safe;It can also use battery power supply, but this way cannot carry out long-term power supply, and will cause unnecessary maintenance cost expenditure;
[0005] (3) using light supplement illumination to illuminate target measuring point (mark). The light supplement way commonly used in photographic surveying at present is mainly the area light source of a large number of light emitting diodes (LED) or the larger searchlight. The problem of the former is that light is too dispersed, the light source divergence angle is larger, and the imaging of the camera near the light source will be affected, and the light supplement distance is short, and the light supplement effect for the object at a long distance (60-100m) is poor;The light is too concentrated, the light source divergence angle is small, and the uniform illumination effect cannot be formed in a certain area;And the light angle is not parallel to the camera optical axis, only a small amount of reflected light can enter the camera lens, the light supplement efficiency is low, and the light supplement effect is poor. CONTENT OF THE UTILITY MODEL
[0006] The light supplement system for camera displacement measurement system designed in the utility model can at least partially solve the above problems.
[0007] The utility model discloses a light supplement system for camera displacement measurement system, which comprises an active light source capable of being arranged in the area where the camera array is located and a reflecting piece capable of being arranged in the area where the target measuring point is located.
[0008] In some embodiments, the light emitting component is a light emitting diode (LED).
[0009] In some embodiments, the optical converging component is one of a Fresnel lens and a convex lens.
[0010] In some embodiments, the light reflecting member comprises a mounting carrier and a light reflecting layer covering a first side of the mounting carrier, the light reflecting layer being a road traffic light reflecting film.
[0011] In some embodiments, the cameras in the camera array are arranged in a height direction, and the camera array forms a lower region and an upper region in the height direction, at least one of the active light emitting sources being arranged in the lower region, and at least one of the active light emitting sources being arranged in the upper region.
[0012] In some embodiments, the optical converging component of each of the active light emitting sources in the upper region has a higher light converging capability than the optical converging component of each of the active light emitting sources in the lower region.
[0013] In some embodiments, when the camera in the upper region and the lower region is a single camera, the angle between the optical axis of the optical converging component in the corresponding region and the horizontal plane is equal to the angle between the optical axis of the camera in the corresponding region and the horizontal plane; or when the cameras in the upper region and the lower region are two or more cameras, the angle between the optical axis of the optical converging component in the corresponding region and the horizontal plane is equal to the average of the angles between the optical axes of the cameras in the corresponding region and the horizontal plane.
[0014] In some embodiments, the light supplementing system further comprises a fixed mounting member, a bottom end of the fixed mounting member having a connecting structure connected to the assembly carrier, and the camera array and the active light emitting sources being assembled on a vertical side of the fixed mounting member.
[0015] In some embodiments, the target measurement points are multiple, and the light reflecting members are multiple, each of the light reflecting members being arranged one-to-one with each of the target measurement points.
[0016] In some embodiments, the light emitting component and the optical converging component are assembled as a whole.
[0017] The light supplementing system applied to the camera displacement measurement system of the utility model:
[0018] On one hand, the active light-emitting light source emits light after being electrically connected with the power supply, and is arranged in a region where the camera array is located to meet the illumination requirement of the camera array accessory, and the passive light-reflecting member which is not electrically connected with the power supply is arranged in a region where the target measuring point is located, and can reflect the light emitted by the active light-emitting light source, thereby achieving the illumination of the target measuring point region, improving the illumination of the photogrammetry field of view of the camera array, and being passive light-emitting mode, without separately providing the power supply to supply power, without generating wiring workload, and being not limited by the engineering power supply condition, and being more energy-saving, environment-friendly and flexible in arrangement; on the other hand, the optical converging assembly which can converge the light emitted by the light-emitting assembly is arranged in the active light-emitting light source, thereby achieving the control of the light divergence angle, preventing the adverse effect on the camera imaging, and being capable of changing the light source coverage range and the light illumination in the region. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a layout schematic view of the light supplement system of the camera displacement measurement system of the embodiment of the utility model (containing a camera array).
[0020] In the drawing:
[0021] 1, active light-emitting light source; 11, light-emitting assembly; 12, optical converging assembly; 2, light-reflecting member; 3, fixed mounting member; 100, camera. DETAILED DESCRIPTION
[0022] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. In the drawings, the thicknesses of regions and layers are exaggerated for clarity. Like reference numerals may designate like elements, and "details" thereof will be omitted.
[0023] The described features, structures, or characteristics can be combined in any suitable manner in one or more implementations. In the following description, numerous specific details are provided to give a thorough understanding of implementations of the present application. One skilled in the relevant art will recognize, however, that the implementations of the present application can be practiced without one or more of the specific details, or with other methods, components, light-reflecting films, etc. In other instances, well-known structures, light-reflecting films, or operations have not been shown or described in detail to avoid obscuring aspects of the present application.
[0024] The following described embodiments are the application of the present application in camera displacement measurement system light supplement system, this example is only a part of the embodiments of the present application, but the protection scope of the present application is not limited to this. All other embodiments obtained by ordinary skilled in the art without making creative efforts should be covered within the protection scope of the present application.
[0025] Please refer to Figure 1 According to the embodiments of the present application, a light supplement system applied to a camera displacement measurement system is provided, which comprises an active light source 1 capable of being arranged in the area where the camera array (not marked in the figure) is located and a reflecting member 2 capable of being arranged in the area where the target measurement points (i.e. the area where the No. 1 measurement point, the No. 2 measurement point,..., and the No. n measurement point shown in the figure are located) are located. Figure 1 The active light source 1 comprises a light emitting component 11 and an optical converging component 12 located on the light emitting path of the light emitting component 11. The light emitted by the light emitting component 11 can be converged by the optical converging component 12 and then irradiated on the reflecting surface of the reflecting member 2. It can be understood that the aforementioned active light source 1 is a light source that emits light after being electrically connected with an external power supply, while the aforementioned reflecting member 2 does not need to be powered and can emit the light irradiated on its reflecting surface to form a passive light source.
[0026] In the technical solution, on the one hand, the active light source 1 emits light after being electrically connected with the power supply and is arranged in the area where the camera array is located to meet the illumination requirement of the camera array accessories. Meanwhile, the reflecting member 2 that does not need to be connected with the power supply is arranged in the area where the target measurement points are located and can reflect the light emitted by the active light source 1 to realize the illumination of the target measurement point area. In this way, the illumination of the camera array photogrammetry field of view is improved. Since it is a passive light mode, the power supply does not need to be separately provided for power supply, wiring workload is not needed, and it is not limited by the engineering power supply condition, which is more energy-saving, environmentally friendly, and flexible in arrangement. On the other hand, the optical converging component 12 capable of converging the light emitted by the light emitting component 11 is arranged in the active light source 1 to realize the control of the light divergence angle and prevent the adverse effects on the imaging of the camera 100. The light source coverage range and the light illumination in the area can be changed.
[0027] In some embodiments, the light emitting component 11 is a light emitting LED (Light Emitting Diode). Specifically, the specific model of the light emitting LED can be reasonably selected according to the actual requirement of the photogrammetry site, and specifically, it is an LED lamp bead or an LED array.
[0028] In the technical solution, the light emitting LED is used as the light emitting component 11, which has the characteristics of small power consumption and large illumination, and is more energy-saving and environmentally friendly.
[0029] In one specific embodiment, the optical converging assembly 12 is one of a Fresnel lens, a convex lens, in which the technical solution adopts a conventional lens on the market as the optical converging assembly 12, which can simplify the manufacturing cost of the light supplement system.
[0030] In some embodiments, the light emitting assembly 11 and the optical converging assembly 12 are assembled as a whole, and specifically, the light emitting assembly 11 and the optical converging assembly 12 are both surrounded by a light-tight shell (not labeled in the figure) to ensure that the light emitted by the light emitting assembly 11 can be emitted after being converged by the optical converging assembly 12 with high flux. In the technical solution, the light emitting assembly 11 and the optical converging assembly 12 are assembled as a whole, which can facilitate the efficient assembly of the active light source 1 in the photogrammetric field and improve the work efficiency.
[0031] In some embodiments, the light-reflecting member 2 includes a mounting carrier (not shown, not labeled in the figure) and a light-reflecting layer (not shown, not labeled in the figure) covering the first side of the mounting carrier, and the light-reflecting layer is a road traffic light-reflecting film. In a specific embodiment, the aforementioned road traffic light-reflecting film can be a road traffic IV light-reflecting film in accordance with the GB / T18833-2012 standard, so as to reflect the incident light as much as possible, that is, the reflected light is nearly parallel to the incident light, and the use of converging light can make the light source light emission direction (i.e. the light source optical axis) and the camera optical axis remain parallel as much as possible.
[0032] Specifically referring to Figure 1 , the cameras 100 in the camera array are arranged at intervals in the height direction, and the camera array forms a lower region (i.e. the region where the two cameras 100 below in Figure 1 are located) and a higher region (i.e. the region where the two cameras 100 above in Figure 1 are located) along the height direction, and at least one active light source 1 is arranged in the lower region, and at least one active light source 1 is arranged in the higher region.
[0033] In the technical solution, at least one active light source 1 is arranged in the higher region and the lower region respectively, so as to further improve the coverage range of the light emitted by the light source.
[0034] In one specific embodiment, the light converging capability of the optical converging assembly 12 of each active light source 1 in the higher region is higher than the light converging capability of the optical converging assembly 12 of each active light source 1 in the lower region.
[0035] In the technical solution, the upper two layers of cameras 100 cover a region (i.e., a higher region) far from the measuring point, so as to avoid the brightness of the measuring point being too dark. Therefore, the optical convergence assembly 12 with stronger convergence ability is selected to improve the illumination. Since the upper and lower light sources supplement light to different regions respectively, and the lower light source has a large divergence angle and the upper light source has a small divergence angle, the design of the technical solution compensates for the defect that the supplement of light to the measuring point far away is not good, and reduces the uneven distribution of illumination in the photogrammetric measurement region.
[0036] In some embodiments, the light supplement system further comprises a fixed mounting member 3, the bottom end of the fixed mounting member 3 has a connecting structure connected with an assembly carrier, and the camera array and the active light source 1 are assembled on the vertical side surface of the fixed mounting member 3. The fixed mounting member 3 can be a steel frame column, and the assembly carrier can be, for example, the ground (the ground surface), a mobile platform (such as a motor vehicle, etc.).
[0037] In the technical solution, the camera array and each active light source 1 are assembled on the fixed mounting member 3, which can ensure the accuracy of the relative positions of each camera 100 and each active light source 1, and can also assemble each camera 100 and the active light source 1 in advance to improve the efficiency of on-site operation.
[0038] In order to further ensure the uniformity of the illumination in the photogrammetric measurement region and the light supplement effect, the target measuring point has a plurality of target measuring points, and the light reflecting member 2 has a plurality of light reflecting members 2. Each light reflecting member 2 is arranged in one-to-one correspondence with each target measuring point.
[0039] In actual installation, the light supplement system should refer to the pose of each camera 100 in the camera array carrying the light supplement system, when the camera 100 in the higher area and the lower area is single, the included angle between the optical axis of the optical converging assembly 12 in the corresponding area and the horizontal plane is equal to the included angle between the optical axis of the camera 100 in the area and the horizontal plane, or when the camera 100 in the higher area and the lower area is two or more, the included angle between the optical axis of the optical converging assembly 12 in the corresponding area and the horizontal plane is equal to the average of the included angles between the optical axes of the cameras 100 in the area and the horizontal plane, for example, the upper two layers of cameras in the camera array cover a farther area, so the average value calculated according to the actual pitch angles (i.e. the included angles between the optical axes of the cameras and the horizontal plane) of the two layers of cameras is taken as the pitch angle (i.e. the included angle between the optical axis of the light source and the horizontal plane) of the upper light source, to ensure that the included angles between the optical axis of the light source and the optical axes of the cameras on both sides are as small as possible, so as to obtain the best light supplement effect, since the upper two layers of cameras cover a farther area from the light source, in order to avoid that the brightness of the far measuring point is too dark, therefore, the optical converging assembly 12 with stronger converging capacity is needed to be selected to improve the illumination, the lower two layers of cameras cover a closer area, so the average value calculated according to the actual pitch angles of the two layers of cameras is taken as the pitch angle of the lower light source, to ensure that the included angles between the optical axis of the light source and the optical axes of the cameras on both sides are as small as possible, so as to obtain the best light supplement effect, since the lower two layers of cameras cover a closer area from the light source, therefore, the optical converging assembly 12 with weaker converging capacity can be selected.
[0040] When the light supplement system works, the light emitted by the light source (i.e. the active light source 1) is reflected by the reflecting piece 2 at each measuring point and then enters the camera 100 to form the original data of photogrammetry after imaging.
[0041] Those skilled in the art can understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.
[0042] The above is only the preferred embodiment of the present application and is not used to limit the present application, and the present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A supplementary lighting system for use in a camera displacement measurement system, characterized in that, It includes an active light source (1) that can be set in the area where the camera array is located and a reflector (2) that can be set in the area where the target measurement point is located. The active light source (1) includes a light-emitting component (11) and an optical converging component (12) located in the light emission path of the light-emitting component (11). The light emitted by the light-emitting component (11) can be converged by the optical converging component (12) and then irradiate the reflective surface of the reflector (2).
2. The supplementary lighting system according to claim 1, characterized in that, The light-emitting component (11) is a light-emitting LED.
3. The supplementary lighting system according to claim 1, characterized in that, The optical converging component (12) is one of a Fresnel lens or a convex lens.
4. The supplementary lighting system according to claim 1, characterized in that, The reflective element (2) includes a mounting carrier and a reflective layer covering a first side of the mounting carrier, wherein the reflective layer is a reflective film for road traffic.
5. The supplemental lighting system according to claim 1, characterized in that, Each camera (100) in the camera array is spaced apart along the height direction, and the camera array forms a lower region and a higher region along the height direction. At least one active light source (1) is provided in the lower region, and at least one active light source (1) is provided in the higher region.
6. The supplementary lighting system according to claim 5, characterized in that, The light-gathering capability of the optical converging component (12) of each active light source (1) located in the higher region is higher than that of the optical converging component (12) of each active light source (1) located in the lower region.
7. The supplementary lighting system according to claim 5, characterized in that, When there is only one camera (100) in the higher region and the lower region, the angle between the optical axis of the optical converging component (12) in the corresponding region and the horizontal plane is equal to the angle between the optical axis of the camera (100) in the region and the horizontal plane; or, when there are two or more cameras (100) in the higher region and the lower region, the angle between the optical axis of the optical converging component (12) in the corresponding region and the horizontal plane is equal to the average value of the angle between the optical axis of each camera (100) in the region and the horizontal plane.
8. The supplementary lighting system according to claim 1, characterized in that, It also includes a fixing component (3), the bottom end of which has a connection structure for connecting with the assembly carrier, and the camera array and the active light source (1) are assembled on the vertical side of the fixing component (3).
9. The supplementary lighting system according to claim 1, characterized in that, There are multiple target measuring points and multiple reflective elements (2), and each reflective element (2) is set in a one-to-one correspondence with each target measuring point.
10. The supplementary lighting system according to claim 1, characterized in that, The light-emitting component (11) and the optical converging component (12) are assembled into a whole.