Method for short-distance calibration of laser plummet device

Abstract

The invention discloses a method for short-distance calibration of laser plummet device. A vertical and upward laser beam is converted to a horizontal laser beam in an indoor small region by a pentagonal prism and a planar mirror, the total optical distance of the beam is same as conventional calibration distance, a beam ending point can fall into a target near to equipment, an operator is convenient to directly observe, measure and adjust, a single person can rapidly complete operation, and the problems of labor and time waste, high check cost and the like of a conventional method are also solved; the method has the advantages of accuracy, safety, high efficiency, environmental friendliness and labor saving, random verification can be performed, the device is low in cost, is simple to maintain and can be repeatedly used, and the calibration accuracy conforms to national technological specification requirement.

Description

technical field [0001] The invention belongs to the field of verification and calibration of measuring instruments, in particular to a method for calibrating a laser plumb instrument in a short distance. Background technique [0002] The plummet is mainly used in the construction of high-rise buildings, chimneys, and high towers, the installation of large-scale cylindrical machinery, and military manufacturing and other construction projects for the point transfer of plumb lines. It needs to be calibrated and adjusted during its delivery and use. , in order to provide a reliable standard for construction. At present, the plummets used in engineering construction generally need to be sent to professional verification institutions for calibration. [0003] The calibration of the plummet is required to determine the relationship between the indicated value of the plummet and the standard value under specified conditions. At present, there is no unified statutory vertical inst...

AI Technical Summary

Problems solved by technology

[0007] 1) Method 1: The outdoor calibration laser is transmitted vertically. The non-uniform changes in atmospheric temperature and humidity at different altitudes will cause the laser image to shake, and the strong outdoor light will cause detection errors and affect the calibration accuracy;

[0008] 2) Method 1 requires personnel to cooperate in high-altitude operations, which increases the safety risk of high-altitude operations;

[0009] 3) Method 2 requires repeated dismantling and installation of the vertical gauge calibration accessories, which is cumbersome to operate, takes a long time, and the calibration efficiency is low;

[0010] 4) Method 2 has extremely high requirements on the site and devices of the device, the installation, commissioning and maintenance procedures of the calibration device are complicated, the device is expensive, and the popularity is not high;

[0011] 5) The above methods are limited by objective conditions such as weather and region, and cannot be checked at any time;

[0012] In the above methods, the calibration work requires the close cooperation of multiple people, takes a long time, and the calibration cost is high.

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