SU1413424A1 - Theodolite - Google Patents

Abstract

The invention relates to geodetic instrumentation and improves the accuracy of the device. In theodolite, the horizontal angle measurement unit is an electric motor 2, on the shaft of which a disk 3 is fixed. On both sides of the disk 3 there are two pairs of light sources 4, 5 diametrically located relative to the vertical axis of rotation. The measured horizontal angle is determined by the position of the photodetectors 6 after they are rotated on the alidade part 8. Sources 4 are optically coupled to a pair of photodetectors 6 mounted on the stand 1. The vertical angles are measured by projecting the image of the light sources 5 on the end of the horizontal axis 9, where the photodetectors 7 are located, electrically connected to the recording unit 16. 1 il. Yu tilL :, (L 00 1C 4

Description

The invention relates to instrumentation, in particular to electronic theodolites, total stations, used in geodesy.

The purpose of the invention is to improve accuracy.

The drawing shows a schematic diagram of a theodolite.

The device contains a stationary stand 1, a unit for measuring horizontal angles, made in the form of an electric motor 7., on the shaft of which a disk 3 with two pairs of optocouplers is mounted, consisting of light sources 4, 5 and photodetectors 6.

LEDs or miniature lamps with masks can be used as light sources.

c on the circumference of rotation of the photodetectors 7 with the lens 15, i.e. at the end of the horizontal axis 9. When the horizontal axis 9 rotates, the pulse counter in the electronic unit 16 turns on, while the number of pulses is directly proportional to the angle of rotation of the horizontal axis 9 relative to the main direction set by the light source 5 and the photodetector 6 mounted on the column alidade 8. The results of measuring the angles of the electronic unit 16 outputs a digital indicator, a magnetic tape, etc.

The use of optocouplers mounted on an alidade and indicating the measured direction in the measurement of horizontal angles to denote

Half of the elements of the optocoupler - photo-20 of the main direction in the measurement

receivers 6, 7 are fixed respectively on the stand of the alidade part 8 and on the end of the horizontal axis 9, in which the viewing tube 10 is located.

The photodetectors 7 constitute a unit for measuring vertical angles.

An image transfer unit is installed on the theodolite column, containing mirrors 11–13, an optical component. The nent 14, which mates with the lens of the photoreceiver 15, the electronic unit 16 for recording angular information by the time method, is connected with the KOTopbiM photodetectors.

The column rotates on a hollow vertical axis 17.

The device works as follows.

After mounting the stand 1 on the stand and turning on the device, the electric motor 2 rotates the disk 3 with the light sources 4 and 5. The main direction for measuring horizontal angles is determined by the optocouplers on the stand. Measured horizontal. the angle is determined by the position of the photodetectors 6 after the rotation of the alidade part 8 on the hollow axis 17. The main direction for measuring the vertical angles is determined by the optocoupler 5, 6.

When aiming the telescope 10 with the horizontal axis 9 rotating, the image of the light sources 5 (half of the optocoupler) along the entire circumference is transmitted by the mirror 11 to the mirror 12, the optical power component 14 and the mirror 13 projects 25

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Claims (1)

vertical angles, allows the use of one electronic unit for processing angular information for both horizontal and vertical angles, i.e. twice reduce the number of boards and electronics. Invention Formula A theodolite containing a telescope, a vertical and horizontal axis of rotation, units for measuring horizontal and vertical angles, a recording unit, an image transfer unit, an alidade part and a stand, characterized in that, in order to make the accuracy, the unit for measuring horizontal angles is an electric motor, associated with the first and second pairs of heights separated in height diametrically located relative to the vertical axis of rotation of the light sources mounted for rotation relative to the base The first pair of diametrically located photoreceivers, optically conjugated with the first pair of light sources, is attached to the first pair of photodetectors, optically conjugated to the second pair of light sources, mounted on the alidade part, the unit of measuring the vertical angles is made as the third pair diametrically located photodetectors rigidly fastened to the horizontal axis of rotation and optically conjugated to one of two pairs of light sources, each of the photoreceivers being electrically connected to the unit gistratsii five 0 five 0 five 0 five vertical angles allows the use of a single electronic unit for processing angular information for both horizontal and vertical angles, i.e. twice reduce the number of boards and electronics. Invention Formula A theodolite containing a telescope, a vertical and horizontal axis of rotation, blocks for measuring horizontal and vertical angles, a recording unit, an image transfer unit, an alidade part and a stand, characterized in that, in order to improve accuracy, the unit for measuring horizontal angles is in the form of an electric motor, associated with the first and second pairs of heights separated by height diametrically located relative to the vertical axis of rotation of the light sources mounted for rotation relative to the substrates mounted on the first pair of diametrically located photodetectors optically conjugated with the first pair of light sources, the second pair of photodetectors optically conjugated to the second pair of light sources mounted on the alidade part, the unit for measuring the vertical angles is a third pair of diametrically arranged photodetectors rigidly fastened to the horizontal axis of rotation and optically coupled to one of two pairs of light sources, each of the photodetectors electrically connected to the unit p Registration