An automatic calibration system of a five-point laser module precision test board

By acquiring multi-source monitoring data and performing analysis on optical axis offset, support disturbance, and target surface drift, the optical axis offset is dynamically compensated, solving the automatic calibration problem of the five-point laser module precision test stand and improving the reliability and accuracy of the measurement results.

CN122042216BActive Publication Date: 2026-07-14XIAN TIANHE LASER INSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN TIANHE LASER INSTR CO LTD
Filing Date
2026-04-20
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The existing five-point laser module precision testing platform lacks a dynamic and self-consistent automatic correction mechanism for the platform's own spatial attitude reference. This causes the optical axis reference, support attitude reference, and target surface spatial reference to gradually drift in the operating environment, making it impossible to monitor and automatically correct in real time, resulting in the accumulation of measurement errors.

Method used

The data acquisition unit acquires multi-source monitoring data, including optical axis reference information, target surface laser point position information, support posture data, and test platform temperature data. Combined with optical axis offset analysis, support disturbance analysis, and target surface drift analysis, a dynamic compensation factor is determined to dynamically compensate for optical axis offset in order to achieve automatic calibration.

Benefits of technology

This effectively avoids the accumulation of systematic errors, improves the reliability and accuracy of the five-point laser module measurement results, and ensures the long-term stability of the test bench.

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Abstract

The present application relates to the field of optical precision measurement and automation detection technology, and particularly relates to an automatic calibration system of a five-point laser module precision test table, comprising: a data acquisition unit for acquiring multi-source monitoring data; an optical axis offset analysis unit for determining an optical axis reference offset non-stability index and determining the sensitivity of optical axis offset to the measurement error of the five-point laser module; a support disturbance analysis unit for determining the unexpected disturbance coefficient of attitude and temperature, and combining the unexpected disturbance coefficient and the sensitivity of optical axis offset to the measurement error of the five-point laser module to determine the sensitivity index of the test table geometric reference disturbance to the measurement error; a target surface drift analysis unit for determining the target surface space reference drift index; and a calibration unit for combining the target surface space reference drift index and the sensitivity index of the test table geometric reference disturbance to the measurement error to determine the dynamic compensation factor of the optical axis of the test table during automatic calibration, and dynamically compensating the optical axis offset.
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