Outdoor calibration method for infrared range finder

Abstract

The invention discloses an outdoor calibration method for an infrared range finder, and relates to the technical field of range finder calibration. The method comprises the following steps: selectinga preset calibration site, and determining an initial point and a measurement direction; placing a laser ranging sensor at the initial point, determining a base line along the measurement direction bymatching with a reflecting plate, and setting a first base point with a preset distance from the initial point on the base line; using a theodolite and a benchmark instrument to measure and extend the base line in the measuration direction, setting a second base point-Nth base point at the extending part of the base line at intervals, and enabling the distance between every two adjacent base points to be smaller than or equal to the measuring limit of the laser distance measuring sensor; placing a measured infrared range finder at the initial point, setting a measurement point on the baselinealong the measurement direction, measuring the distance L of the measurement point by using the measured infrared range finder, and measuring the distance L' from the measurement point to the initialpoint based on the first base point to the Nth base point by using the laser range finding sensor; and subtracting the distance L from the distance L' to obtain an error value delta L of the measuredinfrared range finder.

Description

technical field [0001] The invention relates to the technical field of rangefinder calibration, in particular to an outdoor calibration method for an infrared rangefinder. Background technique [0002] Infrared rangefinder is a portable measuring instrument that uses laser as the carrier and is characterized by diffuse reflection measurement on the target surface. It uses pulse method, phase method and other methods to measure the short-range distance in space. Used in industrial measurement and control, mines, ports, military and other fields. [0003] At present, infrared range finders need to use standard steel tape devices (within 50m) or standard length baseline devices (50m ~ 200m) to perform indication error verification under laboratory conditions, but the 50m standard steel tape verification platform and standard length reference are generally There are no provincial-level metrology technical institutions, and the national-level metrological technical institutions ...

AI Technical Summary

Problems solved by technology

[0003] At present, infrared range finders need to use standard steel tape devices (within 50m) or standard length baseline devices (50m ~ 200m) to perform indication error verification under laboratory conditions, but the 50m standard steel tape verification platform and standard length reference are generally There are no provincial-level metrological technical institutions, and usually need to be submitted to national-level metrological technical institutions for inspection to complete traceability. In addition, there is still no effective method for calibration of indication errors above 200m, especially the lack of on-site calibration methods.

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