Photogrammetry control method and device based on laser galvanometer and electronic equipment

By using a laser galvanometer to form multiple gratings within a single camera exposure cycle and combining this with real-time deflection angles to calculate three-dimensional coordinates, the complexity and flexibility issues of calibration for fixed laser grating measurement systems are solved, enabling efficient and accurate three-dimensional measurement.

CN121632068APending Publication Date: 2026-03-10ZG TECH CO LTD
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Patent Information

Application Number
CN202511778754.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-28
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Existing photogrammetry techniques based on fixed laser gratings suffer from problems such as complex calibration, poor flexibility, low measurement efficiency, and difficulty in accurately measuring moving objects.

Method used

A laser galvanometer is used to deflect multiple laser gratings within a single camera exposure cycle. The three-dimensional coordinates are calculated by combining the real-time deflection angle and camera parameters. A path planning algorithm is then used to generate a scanning path that fits the object, enabling the acquisition of multiple grating data in a single exposure.

Benefits of technology

It improves the efficiency and accuracy of 3D measurement, simplifies the system calibration process, enhances adaptability to objects of different sizes and shapes, enables precise measurement of moving objects, and reduces system complexity and cost.

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Abstract

The invention provides a photogrammetry control method and device based on a laser galvanometer and electronic equipment, and belongs to the technical field of photogrammetry, and the method comprises the steps: controlling the laser galvanometer to deflect according to a preset scanning path in a single exposure period of a camera, so as to form n laser gratings in a single frame image collected by the camera; extracting feature information of each laser grating from the single-frame image, wherein the feature information comprises pixel coordinates in a space coordinate system; and calculating three-dimensional coordinate points of the surface of the object to be measured according to the real-time deflection angles of the laser galvanometer when the laser galvanometer projects the laser gratings, the feature information of the laser gratings and pre-calibrated camera parameters, and summarizing to generate three-dimensional point cloud data. According to the invention, the precision of photogrammetry is improved.
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