Target for close-range photogrammetry

Abstract

The invention discloses a target for close-range photogrammetry. The target comprises a wall hole, the close-range photogrammetry target comprises an abutting mechanism, a clamping mechanism and a fixing mechanism, the abutting mechanism comprises a screw rod arranged in the wall hole, and the outer surface of the screw rod is provided with a first arc abutting plate and a second arc abutting plate. A limiting rod is arranged at the joint of the first arc abutting plate and the second arc abutting plate, and when the threaded rod is in threaded connection with the first threads on the inner walls of the first arc abutting plate and the second arc abutting plate, the distance between the first arc abutting plate and the second arc abutting plate can be expanded through extrusion of the threaded rod. Limiting blocks at the two ends of the limiting rod can slide on the inner wall of a limiting groove in a limiting mode, so that the first arc abutting plate and the second arc abutting plate abut against the inner wall of the wall hole, the screw rod is located in the middle of the wall hole, and therefore when close-range photogrammetry is adopted for detection, the wall hole measurement and detection precision can be guaranteed, disassembly and assembly are more convenient, repeated use is achieved, the service life is prolonged, and high practicality is achieved.

Description

technical field [0001] The invention belongs to the technical field of steel structure manufacturing, and in particular relates to a target for close-range photogrammetry. Background technique [0002] Steel bridges are connected by bolts on site, and the hole-making accuracy will directly affect the linearity and size of the bridge. Therefore, the control of component hole-making accuracy is the key to in-factory production. Close-range photogrammetry is used for in-factory inspection of components. Under the existing technical conditions, it is impossible to complete the target-free digital recognition of the hole position. Even if the target-free recognition of the hole position is realized through the optimization of the software system, it may not be applied to the precise detection of bridge steel structures due to low precision. , close-range photogrammetry and spherical targets are used to detect the hole position. When using it, the target needs to be manually place...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a target for close-range photogrammetry to solve the problem of using close-range photogrammetry with a spherical target to detect the hole position proposed in the background technology. When using it, the target needs to be manually placed on the outer edge of the hole wall for measurement. This method is difficult to accurately ensure the accuracy of the hole position; and the artificial hand is sore for a long time; at the same time, it is not convenient to fix the close-range photogrammetry target, which leads to the problem of hole position deviation

Images