A visual displacement measurement system and its measurement method

Abstract

The invention provides a vision displacement measurement system comprising a reference board, a laser device arranged on a far end basis and a movable acquisition device. Laser beams emitted by the laser device are arranged in the reference board. The movable acquisition device comprises an image acquisition lens, and a measurement basis frame, a coordinate direction mark point and an information code are arranged on the surface of the reference board. A calibration grid is distributed in the basis frame, the information code is a bar code or a two-dimensional code, and corresponding reference board specification data and ID recognition information are set in the information code; the laser device and the mobile acquisition device are connected with a server terminal through electric signals. The system has the advantages that the whole system is low in manufacturing cost, and a lot of cost is reduced; displacement changes of a detected object can be measured more accurately by measuring changes of relative displacement, and accuracy is high; meanwhile, compared with existing fixed measurement, multi-angle multi-direction photographing control can be achieved, and the measurement and use range is wider.

Description

technical field [0001] The invention belongs to the technical field of displacement monitoring, in particular to a measurement system for displacement changes in the construction field. Background technique [0002] As time goes by, the displacement of the building will change silently. In order to better detect the new safety performance of the building, it is necessary to monitor the displacement change. Existing detection methods generally use displacement sensors to measure vertically or horizontally, and manually calculate and compare multiple measurements to obtain the displacement change. But it is easy to cause inaccurate measurement data. At the same time, when the existing method is manually measured, the measurement points are different, which will inevitably cause measurement errors before and after. Existing machine vision must use special industrial cameras and special acquisition equipment. The price is relatively expensive and the interface is complicated. ...

AI Technical Summary

Problems solved by technology

However, it is easy to cause inaccurate measurement data

At the same time, when the existing method is manually measured, the measurement points are different, which will inevitably cause measurement errors before and after

Existing machine vision must use special industrial cameras and special acquisition equipment, the price is relatively expensive, the interface is complicated, and it is only suitable for industrial production environments. Many engineering sites do not have installation conditions, so the application in the construction field is limited.

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