What is the purpose of theodolite?

Theodolite is a tool for measuring horizontal and vertical angles, which is mainly used for triangulation. It is an important tool in surveying and engineering work, especially in places where surveying is difficult to reach. But sometimes it is also used in meteorology and launching rockets.

Theodolite has a telescope. The mechanical part of the telescope enables the telescope to point in different directions. The theodolite has two perpendicular rotating shafts to adjust the azimuth and horizontal height of the telescope. This kind of bracket has simple structure and low cost, and is mainly used with ground telescopes (geodesy, bird watching, etc.). ). If it is used to observe celestial bodies, it is necessary to rotate two axes at the same time and change the rotation speed with time to track the celestial bodies. However, other celestial bodies in the field of view rotate relative to the target celestial bodies, and unless a mechanism to counteract the rotation of the field of view is added, it is not suitable for long-exposure celestial photography.

Structure of theodolite (main commonly used components):?

1, telescope brake screw?

2. Telescope?

3. The miniature screws of the telescope?

4. Horizontal braking?

5. Horizontal inch screw?

6, foot spiral

7. Optical sight?

8. Focusing objective?

9. Eyepiece focusing?

10, dial reading microscope focusing?

1 1, micro screw for vertical dial gauge tube liquid level?

12, optical centering device?

13, base wheel level?

14, instrument base

15, vertical dial

16, vertical lighting mirror?

17, aiming tube level

18, horizontal dial position change handwheel

The telescope is fixedly connected with the vertical disk and installed on the bracket of the instrument. This part is called the sighting part of the instrument and belongs to the upper part of the instrument. The telescope and the vertical disk can rotate around the horizontal axis in the vertical plane. The collimation axis of the telescope should be orthogonal to the horizontal axis, which should pass through the drawing center of the water tray. Several shafts of the sighting part (rotating shaft of sighting part) are inserted into the shaft sleeve of the instrument base, and the sighting part can rotate horizontally.