Submillimeter precision ruler for measuring horizontal displacement based on collimation method

Abstract

The invention discloses a sub-millimeter precision ruler for measuring horizontal displacement based on a collimation line method. Scale lines are set on the front side of a ruler from the head end as a zero point to the tail end. A measuring point knob A is arranged at a middle position of the bottom edge of the ruler. A micrometer sliding block is clamped to the ruler, and slides along the ruler. The surface of the micrometer sliding block is provided with micro-metering division lines. A sighting board is vertically connected above the micrometer sliding block. The sighting board is provided with a hole. A convex lens group is installed at the front side of the hole. A glass plate is installed at the rear side of the hole. The inner surface of the glass plate is provided with a vertical or cross silk thread. The inner surface of the glass plate is located at a position which is within the focal length of a convex lens and approaches the focal length. It is ensured that the plane of the ruler is perpendicular to a collimation line and the back of the ruler is placed horizontally. Sub-millimeter measurement precision is achieved.

Description

technical field [0001] The invention relates to the field of construction engineering detection, in particular to a submillimeter precision ruler for measuring horizontal displacement based on the collimation method and a working method thereof. Background technique [0002] There are various deformations such as horizontal displacement, settlement and inclination in construction engineering, and horizontal displacement observation is an important task of deformation observation. The commonly used methods for horizontal displacement observation generally include line-of-sight method, angle-measuring intersection method or direction-difference intersection method, polar coordinate method, and small-angle measuring method. There will be errors in aiming at the target point, which will easily cause error accumulation. Therefore, the line-of-sight method is often used. [0003] The line of sight method is to use the observation instrument to give a fixed line of sight in the di...

AI Technical Summary

Problems solved by technology

[0005] 1. During long-distance observation, it is difficult to distinguish the scale of the ruler, resulting in aiming errors

[0006] 2. The back of the ulnar is only artificially placed horizontally, which is not accurate enough

[0007] 3. The vertical line of sight on the ruler surface is placed only by human feeling, and the measured displacement is often not vertical to the line of sight.

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