CN-224201427-U - Multi-machine-image acquisition device for building bridge structure prefabricated part three-dimensional model

CN224201427UCN 224201427 UCN224201427 UCN 224201427UCN-224201427-U

Abstract

The utility model discloses a multi-camera image acquisition device for building a three-dimensional model of a bridge structure prefabricated part, which comprises a portal steel frame and a track assembly, wherein the portal steel frame comprises truss columns respectively positioned at two sides of the bridge structure prefabricated part and truss girders positioned above the bridge structure prefabricated part, the truss girders are arranged at the tops of the two truss columns, cameras are arranged on the truss columns and the truss girders at intervals to form a camera matrix with fixed relative positions and used for acquiring image data of the bridge structure prefabricated part, the track assembly comprises sliding tracks respectively corresponding to the two truss columns, the sliding tracks are parallel to the length direction of the bridge structure prefabricated part, and the truss columns are arranged on the corresponding sliding tracks in a sliding fit manner. The multi-image acquisition device for building the bridge structure prefabricated part three-dimensional model is used for fusing image data acquired by each camera through fixing the position relation among the cameras so as to build the bridge structure prefabricated part three-dimensional model.

Inventors

ZHANG PAN
DU JU
REN JIE
HAN ZHENG
YU MING
Sun Luwu
CHEN GEN

Assignees

中铁十一局集团第五工程有限公司

Dates

Publication Date: 20260505
Application Date: 20250625

Claims (10)

1. The multi-image acquisition device for building the three-dimensional model of the bridge structure prefabricated part is characterized by comprising a portal steel frame and a track assembly, wherein the portal steel frame comprises truss columns positioned at two sides of the bridge structure prefabricated part and truss girders positioned above the bridge structure prefabricated part, and the truss girders are arranged at the tops of the two truss columns; The rail assembly comprises sliding rails which are respectively and correspondingly arranged with the two truss columns, the sliding rails are parallel to the length direction of the bridge structure prefabricated part, and the truss columns are installed on the corresponding sliding rails in a sliding fit mode.
2. The multi-camera image acquisition device for building the three-dimensional model of the bridge structure prefabricated part according to claim 1, wherein in the camera matrix, the overlapping degree of two adjacent cameras on image data acquired by the bridge structure prefabricated part is more than or equal to 80%.
3. The multi-camera image acquisition device for building the three-dimensional model of the bridge structure prefabricated part according to claim 1, wherein a light supplementing lamp is arranged beside each camera.
4. A multi-machine image acquisition device for building a three-dimensional model of a bridge structure prefabricated part according to any one of claims 1 to 3, wherein the truss column and the truss girder are assembled by using chord members and web members.
5. The multi-camera image acquisition device for building the three-dimensional model of the bridge structure prefabricated part according to claim 4, wherein the chord member comprises a connecting section and a component section, a connecting tenon for connecting the component section and the web member is arranged on the connecting section, and a connecting jack is arranged in the connecting tenon.
6. A multi-machine image acquisition device for three-dimensional modeling of prefabricated elements of bridge construction according to claim 5, wherein said connection tenon comprises a first tenon for connecting said element segments and a second tenon for connecting said web members.
7. The multi-camera image acquisition device for building a three-dimensional model of a prefabricated bridge structure of claim 6, wherein the first rabbet comprises a parallel rabbet parallel to the longitudinal direction of the truss column or truss girder and a perpendicular rabbet perpendicular to the longitudinal direction of the truss column or truss girder.
8. The multi-camera image acquisition device for building a three-dimensional model of a bridge construction prefabricated unit according to claim 7, wherein the second tenon is arranged obliquely relative to the parallel tenon, and an included angle between the second tenon and the parallel tenon is 30 degrees.
9. The multi-camera image acquisition device for building a three-dimensional model of a prefabricated member of a bridge structure according to claim 5, wherein a counter-pulling screw is arranged between the connecting tenon and the corresponding member segment or web member.
10. The multi-machine-position image acquisition device for building the three-dimensional model of the bridge structure prefabricated part according to claim 9, wherein a first connecting hole is formed in the connecting tenon, the axis of the first connecting hole is perpendicularly intersected with the axis of the connecting jack, a second connecting hole is formed in the end portion of the part section and the web member, the axis of the second connecting hole is perpendicularly intersected with the axis of the part section or the web member where the second connecting hole is located, and the opposite-pulling screw rod is arranged in the first connecting hole and the second connecting hole in a penetrating mode.

Description

Multi-machine-image acquisition device for building bridge structure prefabricated part three-dimensional model Technical Field The utility model belongs to the technical field of three-dimensional scanning of bridge structure prefabricated parts, and particularly relates to a multi-machine-image acquisition device for building a bridge structure prefabricated part three-dimensional model. Background The existing bridge three-dimensional model building technology is mainly based on two types of image information and laser scanning information. The laser scanning technology needs to purchase special instruments, has higher equipment cost, and the technology based on the image information can use cheaper cameras for image acquisition, thereby being more economical. Existing image acquisition can be broadly divided into two categories, fixed cameras and unmanned aerial vehicles. The unmanned aerial vehicle is suitable for image acquisition and three-dimensional scanning of an actual engineering structure, but is limited by route planning and the requirement on clear distance between the unmanned aerial vehicle and an object to be measured, and the accuracy is difficult to control. The image acquisition of the fixed camera is more controllable, but the problem that the relative position relation between the cameras is difficult to effectively determine when the fixed camera acquires different positions still exists. Disclosure of utility model In view of the above, the present utility model aims to provide a multi-image capturing device for building a three-dimensional model of a bridge structure prefabricated part, which can conveniently perform fusion processing on image data captured by each camera by fixing the positional relationship between the cameras, so as to build the three-dimensional model of the bridge structure prefabricated part. In order to achieve the above purpose, the present utility model provides the following technical solutions: The multi-image acquisition device for building the three-dimensional model of the bridge structure prefabricated part comprises a portal steel frame and a track assembly, wherein the portal steel frame comprises truss columns positioned at two sides of the bridge structure prefabricated part and truss beams positioned above the bridge structure prefabricated part, and the truss beams are arranged at the tops of the two truss columns; The rail assembly comprises sliding rails which are respectively and correspondingly arranged with the two truss columns, the sliding rails are parallel to the length direction of the bridge structure prefabricated part, and the truss columns are installed on the corresponding sliding rails in a sliding fit mode. Further, in the camera matrix, the overlapping degree of the two adjacent cameras on the image data acquired by the bridge structure prefabricated part is more than or equal to 80%. Further, a light supplementing lamp is arranged beside each camera. Further, the truss column and the truss girder are assembled by adopting chord members and web members. Further, the chord member comprises a connecting section and a member section, wherein a connecting tenon used for connecting the member section and the web member is arranged on the connecting section, and a connecting jack is arranged in the connecting tenon. Further, the connecting tenon includes a first tenon for connecting the member segments and a second tenon for connecting the web members. Further, the first tenon includes a parallel tenon parallel to the longitudinal direction of the truss column or the truss girder and a perpendicular tenon perpendicular to the longitudinal direction of the truss column or the truss girder. Further, the second tenon is obliquely arranged relative to the parallel tenon, and an included angle between the second tenon and the parallel tenon is 30 degrees. Further, a split screw is provided between the connecting tenon and the corresponding member segment or web member. Further, a first connecting hole is formed in the connecting tenon, the axis of the first connecting hole is perpendicularly intersected with the axis of the connecting insertion hole, a second connecting hole is formed in the end portion of the member section and the web member, the axis of the second connecting hole is perpendicularly intersected with the axis of the member section or the web member where the second connecting hole is located, and the opposite-pulling screw rod is arranged in the first connecting hole and the second connecting hole in a penetrating mode. The utility model has the beneficial effects that: The multi-image acquisition device for building the three-dimensional model of the bridge structure prefabricated part comprises a portal steel frame, wherein truss columns positioned at two sides of the bridge structure prefabricated part and truss beams positioned above the bridge structure prefabricated part are utilized to form a planetary semi-surro