A high-precision photoelectric detection device axis angle calibration method and system

By establishing a unified spatial rectangular coordinate system and trigonometric function calculations, the problems of uncertain installation posture and reference dependence in the calibration of the axial angle of photoelectric detection devices are solved. High-precision and unique axial angle calibration and rotation change calculation are achieved. It has a self-verification function and is suitable for calibration of multiple devices.

CN122149361APending Publication Date: 2026-06-05XIAN INST OF OPTICS & PRECISION MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN INST OF OPTICS & PRECISION MECHANICS CHINESE ACAD OF SCI
Filing Date
2026-01-13
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing methods for calibrating the axial angle of photoelectric detection devices suffer from uncertainties in the device's installation posture and reliance on references, leading to large measurement errors and non-unique results.

Method used

A high-precision photoelectric detection device axis angle calibration method is adopted. By establishing a unified spatial rectangular coordinate system, using the mutual aiming measurement of the autocollimating theodolite and the cube mirror, and combining trigonometric functions to calculate the angle, systematic errors are eliminated, and the independence of the benchmark and the uniqueness of the result are achieved.

Benefits of technology

It achieves high-precision and unique inter-axis angle calibration, can simultaneously calculate the relative rotational changes between photoelectric detection devices, and has a self-calibration function, reducing debugging difficulty and human error, and is suitable for multi-device calibration.

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Abstract

The present application relates to a kind of relative pose calibration method between devices, specifically relates to a kind of high-precision photoelectric detection device axis angle calibration method and system, purpose is to solve the problem of the measurement error caused by the existing calibration method due to device installation posture uncertainty, strict dependence on reference selection, resulting in calibration result is not unique.The method of the present application comprises: fixing cube on two devices to be calibrated respectively;Using four self-collimating theodolites are self-collimated with the mutually perpendicular reflection surface of two cubes respectively, record the pitch angle;Through the mutual sighting of reference theodolite and other three theodolites, record the azimuth angle;Establish a unified space rectangular coordinate system with reference theodolite as center;Based on the recorded pitch angle and mutual sighting azimuth angle, calculate the unit normal vector of each reflection surface;Finally, the space included angle between the axes of two devices is obtained by included angle operation.The present application has the advantages of unique calibration result, high precision and simple operation.
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