CN209802348U - A level gauge capable of accurate readings - Google Patents

Abstract

The utility model discloses a leveling ruler capable of accurate readings. The body of the ruler is equipped with circular leveling air bubbles, and the elongated ruler surface is drawn with zigzag equal interval markings and zigzag equal interval marking E characters. There are digital marks drawn next to the equally spaced markings, and the vertical distance above and below the sawtooth is equal; there are also short markings drawn on the elongated scale surface, and the height of the short markings is half of the equally spaced markings. The utility model can achieve finer scales, and is convenient for surveyors to read on the leveling rod more quickly and accurately. At the same time, the leveling surface also takes care of the surveyors who are used to the original scale surface, so the new scale surface designed and improved on the basis of the original scale surface can not only take care of the habits of most surveyors, but also improve the reading accuracy.

Description

A level gauge capable of accurate readings

technical field

The utility model belongs to the technical field of level gauges, in particular to a level gauge capable of accurate readings.

Background technique

The basic principle of leveling measurement: To measure the height difference between two points, erect leveling rods on the two points respectively, use the horizontal line of sight provided by the leveling instrument, read the readings on the leveling rods erected on the two points, and obtain the two points The elevation difference between them can be used to calculate the elevation of the unknown point from the elevation of the known point.

Optical leveling is currently the most widely used leveling method that can meet various levels. When measuring, optical levels and equal-spaced marking standards are used. When measuring with an optical level, first fix the level on the installed tripod, level the level according to the tube level bubble of the level, then aim at the level, and adjust the focus until the level is clearly observed by the level, and then the level According to the position of the middle wire on the leveling rod on the reticle, read the large reading part of the height according to the digital meter, and then read the small reading part according to the relative distance marked by the middle wire and the leveling rod. The height difference is calculated according to the mid-filament readings of the leveling rod at different points. According to the readings of the upper wire and the lower wire on the reticle of the level gauge, the distance between the level rod and the level gauge is calculated according to the principle of similar triangles.

In the actual leveling work, optical leveling is mainly read manually, so the measurement results will bring errors caused by surveyors, especially for long leveling routes, there is a problem of surveyor rotation, due to the estimation of each person There are differences, so it will affect the accuracy of the leveling results to a certain extent. In addition, factors such as sunlight and long-term observation will also cause deviations in the estimated reading when the surveyor reads.

Utility model content

In view of the above shortcomings, the purpose of this utility model is to provide a leveling rod capable of accurate reading. The leveling rod can achieve a finer scale, which is convenient for the surveyor to read on the leveling rod more quickly and accurately.

In order to achieve the above object, the technical solution of the present utility model is: a leveling ruler capable of accurate reading, which is characterized in that a circular level bubble is installed on the ruler body, and jagged equal-spaced markings are formed on the elongated ruler surface. There are numbers marked next to the equal interval markings, and the vertical distance above and below the saw teeth is equal; there are also short markings on the elongated ruler surface, and the short markings On one side of the letter E, the vertical distance between the short strokes is equal, and the height of the short strokes is half that of the equally spaced strokes.

The utility model can achieve finer scales, and is convenient for surveyors to read on the leveling rod more quickly and accurately. At the same time, the leveling surface also takes care of the surveyors who are used to the original scale surface, so the new scale surface designed and improved on the basis of the original scale surface can not only take care of the habits of most surveyors, but also improve the reading accuracy.

Compared with the prior art, the utility model has the following advantages:

1. The structure of the utility model is simple, and the design is novel and reasonable.

2. Aim at the big ones first, and quickly estimate and read according to the small partitions, quickly and accurately.

3. The leveling surface also takes care of the surveyors who are used to using the original scale surface, and the design improvement is carried out on the basis of the original scale surface, which not only takes into account the habits of most surveyors, but also improves the reading accuracy.

Description of drawings

Fig. 1 is the structural representation of leveling rod of the present utility model.

Explanation of reference signs: ruler body 1; equal interval scoring 2; short scoring 3; axis 4; circular level bubble 5; E word 6.

Detailed ways

As shown in Figure 1, the utility model is a leveling ruler capable of accurate readings. The ruler body 1 is made of elongated, non-deformable materials, such as indium steel and glass fiber reinforced plastics. The low-precision leveling ruler can be made of high-quality wood or aluminum Made of alloy and other materials. The ruler body 1 is equipped with a circular level bubble 5, and the elongated ruler surface is drawn with jagged equally spaced engravings 2 and jagged equally spaced engraved E characters 6, and there are numbers beside the equidistant engravings, The digital marking indicates the height of a certain edge of a certain line of the equally spaced marking 2, using Arabic numerals, and the large reading of the leveling can be obtained through the digital marking.

The middle of the equally spaced marking 2 and the equally spaced marking E word 6 is zigzag, and the vertical distance above and below the zigzag is equal. For the convenience of reading, there are also short scratches 3 drawn on the elongated scale surface. The short scratches 3 are located on one side of the letter E. The vertical distances between the short scratches 3 are equal. The height of the short scratches 3 is half of equally spaced 2.

When performing leveling measurement, the first step is to install the instrument, first set up the tripod, and then install the leveling rod on the tripod; the second step is to roughly level, adjust the foot screw to center the circular level bubble 5, so that the vertical axis of the instrument Roughly plumb; the third step is to aim at the leveling rod, and turn the eyepiece focusing screw to make the reticle image in the telescope very clear; the fourth step is to accurately level, turn the slightly inclined screw, and adjust until the bubbles of the leveling tube are closely matched (centered). When the line of sight is level; the fifth step of reading is to use the cross hair to read, and obtain the large reading of leveling through digital marking, and then use the equal interval marking 2 and short marking 3 to mark the relative distance between the middle wire and the leveling rod, and read For the small reading part, the leveling data can be obtained by combining the large and small reading parts, and the height difference between different points can be calculated according to the readings of the middle wire of the leveling rod at different points.

The marking on the left side of the axis of symmetry 4 of the utility model can also be made on the right side of the axis of symmetry 4, and can also be read, but the appearance is different.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should be covered within the protection scope of the present utility model.

Claims (1)

1. A leveling rod capable of accurately reading is characterized in that a rod body (1) is provided with round leveling bubbles (5), sawtooth-shaped equal-interval ruling (2) and sawtooth-shaped equal-interval ruling E words (6) are drawn on the surface of a strip-shaped rod, digital marks are drawn beside the equal-interval ruling, and the vertical distances above and below the sawteeth are equal; short scribes (3) are further drawn on the surface of the long strip-shaped ruler, the short scribes (3) are located on one side of the E-shaped ruler, the vertical distances between the short scribes (3) are equal, and the heights of the short scribes (3) are half of those of the scribes (2) with equal intervals.