Testing device for coaxiality precision of forced centering measuring sign

Abstract

The invention discloses a testing device for coaxiality precision of a forced centering measuring sign, wherein the testing device comprises a dial gauge, a gauge bracket, a precise bearing and a base. The gauge bracket of the mounted dial gauge is fixedly connected with the outer ring of the precise bearing. The precise bearing is fixedly connected with the base through an inner ring. The central axis of a gauge bracket vertical rod is parallel with the axis of the inner ring of the precise bearing. In application, the dial gauge is driven to rotate around the forced centering measuring sign through rotating the outer ring of the bearing. A runout amount of the dial gauge which rotates by one cycle is tested and furthermore is compared with a calibrated value of the rotating axis of the precise bearing of a standard member, thereby obtaining a tested value of the coaxiality of the forced centering measuring sign. The testing device provided by the invention has advantages of simple structure, low manufacture cost, high convenience in use, and high testing precision.

Description

technical field [0001] The invention relates to an engineering measuring device, in particular to a detection device for the coaxiality precision of a forced centering measurement mark. Background technique [0002] The survey mark is a device for marking the position of ground survey control points or observation targets, and is a general term for marker stones, target marks and other marks with a clear center or top surface position. When measuring, use the optical plummet of the measuring instrument on the tripod to center the center of the ground measurement mark, so that the center of the measuring instrument and the center of the ground measurement mark are on the same plumb line and in the same plane position. The mandatory centering measurement mark is a special measurement mark that can be directly placed on the measuring instrument or a collimating prism to calibrate the position of the control point, and its purpose is to reduce the centering error of the erecting...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing technology cannot detect the coaxiality accuracy of the forced centering measurement mark, the present invention introduces a coaxiality accuracy detection device for the forced centering measurement mark, which interpolates the precision bearing of the forced centering measurement mark Combined with the dial indicator that touches the centering part of the forced centering measurement mark of the probe, the outer ring of the rotating bearing drives the dial indicator to rotate around the forced centering measurement mark, and detects the beating amount of the dial gauge probe that rotates one revolution, and obtains the forced The detection value of the coaxiality accuracy of the centering measurement mark

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