Coded measuring rod and method of use thereof

Abstract

The invention relates to a coding measuring rod and a using method thereof. The coding measuring rod comprises a control marker rod and a spherical target which sleeves the control marker rod and is capable of moving up and down along the control marker rod, wherein the rod body of the control marker rod is divided into a plurality of sections of different lengths through paint of different colors or different materials. The coding measuring rod disclosed by the invention can be used for measuring of single scanner which can be used for observing the coding measuring rod for many times, and then comparing the data, and is applied to deformation monitoring; the coding measuring rod also can be used for a condition of measuring through a plurality of scanners, and is used for registering multi-station scanned data. The coding measuring rod can be used for solving the problem that a target plane visual angle is limited and a precision control problem for multi-time repeated observation; a working process of the scanners is combined to solve the control problem in practical measuring, register and compare the continuously observed point cloud data; the workload for distributing the target is reduced.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a coded measuring rod and a using method thereof. Background technique [0002] The ground laser scanner is a surveying and mapping instrument that emits and receives laser signals for measurement. It is widely used in surveying and mapping, mining, urban, water conservancy, cultural conservation and other fields, and can quickly produce a large amount of high-precision point cloud data. [0003] When the terrestrial laser scanner collects data, similar to the traditional total station, it is necessary to set the scanning station, and then use the control point (or target) information to register the multi-site cloud data, so as to obtain the complete point of the measured target. cloud data. This process has become a standard process for terrestrial laser point cloud data collection. [0004] The existing point cloud scanning data registration method mainly uses ...

AI Technical Summary

Problems solved by technology

This method of using multiple control target extraction centers has great difficulties for applications such as deformation monitoring

[0005] In addition, in the laser scanning work, the current general-purpose spherical and planar targets all use points as the main feature for data registration, and the target layout in field work is more troublesome; on the other hand, in some deformation monitoring processes, the It may move with the measured object, which will cause the failure of deformation monitoring; moreover, the data registration result with the target as the control point is not conducive to the comparison of geometric data changes in continuous observation; the traditional target is mostly flat, and the actual scanning During the process, there is a deviation of the scanning angle facing the target plane, and the coordinate fitting quality of the target center is often not guaranteed

Images