Steel cable center measuring target frame

Abstract

The invention discloses a steel cable central measuring target framework. The steel cable central measuring target framework consists of a universal connecting square frame of the target framework and a vertical rod arranged at the lower part, wherein the top of the universal connecting square frame is provided with a reflecting prism, and the lower edge of the universal connecting square frame is provided with a leveling round bubble; the lower edge of the universal connecting square frame is connected with the vertical rod through a universal joint; a hexagonal inner core steering shaft sleeve is arranged in the center of the universal connecting square frame; a hexagonal steel cable hole is formed in the center of the hexagonal inner core steering shaft sleeve; a steel cable penetrates through the hexagonal steel cable hole; an outer shaft sleeve is arranged outside the hexagonal inner core steering shaft sleeve; the hexagonal inner core steering shaft sleeve can rotate in the outer shaft sleeve; the outer shaft sleeve is connected with the universal connecting square frame by using a left bracket cross shaft and a right bracket cross shaft; the outer shaft sleeve is fixed by a left nut ejector pin; the hexagonal inner core steering shaft sleeve is fixed by a right nut ejector pin. In order to prevent the hexagonal inner core steering shaft sleeve from sliding out of the outer shaft sleeve, the two end parts of the hexagonal inner core steering shaft sleeve are provided with baffle plates. The steel cable central measuring target framework is suitable for measurement of three-dimensional coordinates of a suspension steel cable, and is particularly suitable for measurement of the steel cable of a suspension bridge.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to a steel cable center measuring target frame specially used for steel cable center measurement. Background technique [0002] At present, more and more suspension bridges are being built on large rivers, which are characterized by large spans and beautiful shapes. In the process of building bridges, the center measurement of the suspension cables has always been a difficult problem for construction and design units. The traditional method is to use a hexagonal frame, place the measuring instrument on it, calculate the error of the measurement point, and perform repeated measurements to calculate datum point. The disadvantages of this measurement method are: (1) It is labor-intensive and time-consuming. Repeated measurement requires a large number of measurement personnel to perform repeated measurements from various positions. (2) There is an error in the measurement. Because the meas...

AI Technical Summary

Problems solved by technology

The disadvantages of this measurement method are: (1) labor-intensive and time-consuming

Repeated measurement requires a large number of measurement personnel to perform repeated measurements from various positions

(2) There is an error in the measurement

Because the measured point is shaking during the measurement process, there will also be errors in calculating the datum point data during repeated measurements

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