Support-free leveling rod

Abstract

The invention relates to the technical field of engineering measurement articles, and particularly relates to a support-free leveling rod. The support-free leveling rod comprises a leveling rod body,fixed pieces, sliding pieces and adjustment devices, wherein one side of the leveling rod body is a scale surface; the fixed pieces are cylindrical and are provided with a rectangular bayonet respectively; the rectangular bayonets are fixedly connected with non-scale surfaces of the leveling rod body; one sliding hole is formed in each of the side surfaces of the fixed pieces; one annular groove is formed in each of the sliding holes; one end of each sliding piece is mutually meshed with the each annular groove and is connected with the each annular groove in a sliding manner; the other end ofthe each sliding piece penetrates out of the each sliding hole and is fixedly connected with the each adjustment device; the each adjustment device comprises a spherical hinge and a support rod; spherical shells of the spherical hinges are fixedly connected with sliding pieces; spherical bodies of the spherical hinges are fixedly connected with the support rod. According to the support-free leveling rod disclosed by the invention, the support-free leveling rod does not need to be supported manually during measurement, micro-adjustment also can be carried out, measurement data is accurate, andan original bench mark of a wall side can be measured.

Description

technical field [0001] The invention relates to the technical field of engineering surveying supplies, in particular to a support-free leveling rod. Background technique [0002] In surveying and mapping work, the level is one of the indispensable tools. It is used to transmit the elevation, so as to establish a coordinated elevation system; in the construction industry, from the early site leveling, foundation pit excavation, to the later main body construction, Levels play an important role until the end of the entire project. The leveling rod is an instrument for measuring the height difference between two points on the ground according to the principle of leveling. At present, most leveling rods are mostly made of wood, aluminum or fiberglass, and the length of the ruler is mostly 3 meters. Two are a pair and are used on both sides. [0003] At present, the use of leveling rods is very common in leveling surveys, especially when conducting large-scale leveling surveys,...

AI Technical Summary

Problems solved by technology

[0003] At present, the use of leveling rods is very common in leveling surveys, especially when conducting large-scale leveling surveys, a large number of stations need to be set up, and each station needs to read the front sight and the back sight twice. , it is necessary to manually support the ruler. First, place the bottom center of the leveling ruler on the leveling origin, and hold the leveling ruler with both hands to prevent it from shaking. Because the leveling ruler has a certain height and is heavy, it often occurs when supporting the leveling ruler. Shaking, even slight shaking can cause deviations in measurement data and reduce accuracy

Although there are support-free leveling rods on the market at present, some leveling points are built close to the wall, which makes it impossible to place such leveling points on the leveling point; it is difficult to adjust the current leveling level to be accurate when it is vertically adjusted, and it can only be adjusted by Swing the leveling rod for rough adjustment, so the positioning cannot be completely accurate, and the error will accumulate step by step. Finally, when processing the data, the reading may exceed the limit. Once the reading exceeds the limit, it has to be re-measured. quality, and re-measurement will delay manpower and material resources

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