CN205333086U - Prism centering rod calibrator - Google Patents

Abstract

The utility model provides a prism centering rod calibrator, including the annular clamped board and the tripod of fixing terminal surface under the fixed plate, being provided with bearing frame and bearing on the fixed plate, the bearing frame is fixed on the fixed plate through three evenly distributed's adjusting bolt, and the bearing internal fixation has the hollow shaft. The beneficial effects of the utility model are that: the utility model has the advantages of simply, easy operation, the calibration is quick, the calibration accuracy is high.

Description

A prism centering rod calibrator

technical field

The invention belongs to the field of engineering measuring tools, in particular to a prism centering rod calibrator.

Background technique

With the development of modern surveying and mapping science and technology, the optical theodolite has been gradually replaced by the total station electronic speed measuring instrument (total station). The prism centering rod used with the total station is widely used because of its lightness and practicality. However, whether the centering rod is tilted or not is related to the accuracy of the measurement results. The traditional calibration method needs to be equipped with a total station, which is very cumbersome and difficult to operate, and requires the cooperation of multiple people outdoors.

Utility model content

The purpose of the utility model is to provide a prism centering rod calibration device that is simple, easy to operate, fast in calibration, high in calibration accuracy and only needs one person, and can be performed indoors and outdoors.

The utility model is achieved through the following measures: a prism centering rod calibrator, comprising an annular fixed plate and a tripod fixed on the lower end surface of the fixed plate, the fixed plate is fixed by three evenly distributed adjusting bolts A bearing seat and a bearing, a hollow shaft is fixed inside the bearing.

Wherein, a spring is arranged between the bearing seat and the fixing plate on the periphery of the adjusting bolt.

The side wall of the hollow shaft is provided with at least three bolt holes, and the bolt holes are equipped with fixing bolts.

A blind hole is provided on the upper end surface of the fixing plate, and a round blister is installed in the blind hole.

The beneficial effects of the utility model are: the utility model has the advantages of simplicity, easy operation, quick calibration and high calibration accuracy, wherein, the bearing seat is movable and fixed on the fixed plate through the round hole through the adjusting bolt matched with the bolt hole to facilitate adjustment The prism centering rod is kept vertical, which makes the operation quick and simple; when calibrating, the prism centering rod is fixed on the hollow shaft by fixing bolts, so as to ensure that the centering rod rotates with the hollow shaft during calibration, and there is no need to rotate the centering rod separately, reducing The mutual influence during the calibration work increases the calibration accuracy; the placement of the round water bubble on the fixed plate is conducive to timely observation and adjustment of the tripod at the level, making the calibration work faster. Calibration work is possible.

Description of drawings

Fig. 1 is a perspective view of an embodiment of the utility model.

Fig. 2 is the front view of the utility model embodiment.

Fig. 3 is a top view of the utility model embodiment.

Wherein, reference signs are: 1. fixed plate; 2. bearing seat; 3. bearing; 4. hollow shaft; 5. adjusting bolt; 6. fixing bolt; 7. round blister; 8. spring.

detailed description

In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementation modes.

Referring to Fig. 1, Fig. 2 and Fig. 3, the utility model is a prism centering rod calibrator, comprising an annular fixed plate 1 and a tripod fixed on the lower end surface of the fixed plate 1, and the fixed plate 1 is provided with a bearing seat 2 and a bearing 3. The bearing seat 2 is fixed on the fixed plate 1 through three evenly distributed adjusting bolts 5, the hollow shaft 4 is fixed inside the bearing 3, and the spring 8 is arranged between the outer bearing seat 2 of the adjusting bolt 5 and the fixed plate 1. The side wall of the shaft 4 is provided with at least 3 bolt holes, the bolt holes are equipped with fixing bolts 6, the upper end surface of the fixing plate 1 is provided with a blind hole, and a round blister 7 is installed in the blind hole. The tripod can be made with three 1.2m and 1.5m round steel bars each with a diameter of 10mm. When making, one end of each of the three 1.2m round steel bars is evenly fixed on the fixing seat to form three legs of the tripod. Three 1.5m round steel bars Each round steel bar is fixed horizontally and horizontally between every two legs of the tripod.

When calibrating the prism centering rod, fix the tripod and observe the circular blister 7. When the tripod is level, insert the prism centering rod from the hollow shaft 4 and tighten the fixing bolt 6 to fix the prism centering rod and adjust Adjust bolt 5 to center the circular level bubble, then turn the hollow shaft 4 to drive the centering rod to rotate 180°, if the bubble is not centered, adjust the calibration screw at the bottom of the circular level to move the bubble to the center position by half the offset distance. This method should be repeated 2 to 3 times until the centering rod is turned to any position and the bubbles are centered. It should be noted that before each calibration, the adjustment bolt 5 must be adjusted to center the circular level bubble, and then the centering rod should be rotated 180° to observe the position of the bubble.

This device does not require a total station, and is flexible and simple to operate, less time-consuming, and requires only one person. It can be performed indoors and outdoors, and is especially suitable for the calibration of single-pair center poles without feet.

The undescribed technical features of the utility model can be realized by or using the prior art, so they will not be repeated here. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary skilled persons within the essential scope of the present utility model shall also belong to the protection scope of the present utility model.

Claims (4)

1. a kind of prism centering rod calibrator, it is characterized in that, comprise the tripod of annular fixed plate and be fixed on described fixed plate lower end face, described fixed plate is provided with bearing seat and bearing, described bearing seat passes through three Evenly distributed adjusting bolts are fixed on the fixing plate, and a hollow shaft is fixed in the bearing. 2 . The prism centering rod calibrator according to claim 1 , wherein a spring is arranged between the bearing seat on the periphery of the adjusting bolt and the fixing plate. 3 . 3. The prism centering rod calibrator according to claim 1, wherein at least 3 bolt holes are provided on the side wall of the hollow shaft, and fixing bolts are arranged in the bolt holes. 4. The prism centering rod calibrator according to any one of claims 1-3, wherein a blind hole is arranged on the upper end surface of the fixing plate, and a round blister is installed in the blind hole.