A high-precision distance measurement method

Abstract

The invention discloses a high-precision distance measurement method. The specific steps are as follows: firstly, a laser ranging module is mounted on a linear motion displacement platform of a stepping motor, the moving direction of the displacement platform is adjusted to be perpendicular to the plane where the target is located, and the The target body is pasted on the surface of the leveled target body; after each laser ranging module completes the measurement, the controller completes the accurate control of the stepper motor to complete a single step; The distance value and the displacement platform moving distance value; the displacement platform moving data and the laser ranging result are analyzed by the algorithm of the micro-control circuit, and the accurate distance between the initial position of the laser ranging module and the target can be accurately obtained. Beneficial effects of the present invention: The present invention performs continuous ranging based on a stepping motor with high-precision step distance and the laser ranging sensor on the displacement platform, and can greatly improve the accuracy of laser ranging after algorithm fitting, and uses non-contact Method measurement, convenient measurement.

Description

technical field [0001] The invention relates to the technical fields of building detection, monitoring and engineering measurement, in particular to a high-precision distance measurement method. Background technique [0002] Among the commonly used distance measurement methods in the [1,200] meter section are: tape measure, extensometer, laser range finder, total station and so on. Among these distance measurement methods, the accuracy of the extensometer is the highest, and its theoretical accuracy can reach 0.01mm. However, because contact measurement is required, no obstructions are allowed in the middle of the line between the measuring points. Therefore, its on-site practical application is not very convenient, and it is difficult to adapt to the technical development direction of future automatic measurement. Measurement methods such as laser rangefinders and total stations have low accuracy, and their measurement accuracy can only reach the mm level, which is far fro...

AI Technical Summary

Problems solved by technology

Therefore, its on-site practical application is not very convenient, and it is difficult to adapt to the technical development direction of future automated measurement.

The accuracy of measurement methods such as laser range finder and total station is relatively low, and the measurement accuracy can only reach the mm level, which is far from the accuracy of 0.1mm required by the current deformation monitoring specifications for subways and tunnels.

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