Time baseline parallax method resolving method suitable for oblique photography based on cooperative change of optical axis and control plane

Abstract

The invention discloses a time baseline parallax method based on cooperative change of an optical axis and a control plane. Under the condition that the optical axis is kept perpendicular to the control plane, the purpose of monitoring dynamic deformation of a bridge is achieved to a certain extent when the bridge plane is not perpendicular to the optical axis of the camera or even under the condition of small acute angle monitoring. The time baseline parallax method based on cooperative change of the optical axis and the control plane has high precision. The method is of great significance in understanding and mastering the overall dynamic deformation mechanism of the bridge under the action of external force such as vehicle dynamic load, further improving and perfecting the bridge structure design theory and reducing the occurrence of bridge safety accidents.

Description

technical field [0001] The invention belongs to the technical field of instantaneous dynamic deformation monitoring of large-scale buildings (structures) such as bridges, and specifically relates to a time baseline parallax method solution method based on the coordinated change of the optical axis and the control plane, which is suitable for oblique photography. Background technique [0002] At present, the research status of safety monitoring or deformation monitoring of large-scale buildings (structures) (bridges, towers, etc.) mainly focuses on the following aspects: [0003] (1) Research status of conventional methods in bridge dynamic deformation monitoring [0004] (1) Automatic Total Station [0005] The dynamic deformation monitoring of bridges and the automation of deformation monitoring can be realized by using automatic total stations, but automatic total stations are generally suitable for single-point dynamic deformation monitoring. When multiple automatic tot...

AI Technical Summary

Problems solved by technology

[0009]The current commonly used deformation measurement technology still has some deficiencies in the dynamic deformation monitoring of bridges. static deformation monitoring; automatic total station is suitable for single-point dynamic tracking measurement; when GPS technology is used for high-frequency dynamic deformation monitoring, its measurement error is relatively large, and receivers / GPS signal reception need to be arranged at each point antenna

The monitoring frequency of 3D laser scanning technology is too low, and some sensor technologies often need to be in contact with bridges. The packaging technology, compensation technology, and installation requirements of sensors are relatively strict, requiring high cost funds

Although IBIS-S can monitor the small deformation of bridges, etc., the IBIS radar only obtains the one-dimensional displacement change information in the direction of electromagnetic wave propagation, and cannot obtain the real three-dimensional position change of the target point.

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