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Surveying device having a rotation mirror for optically scanning an environment

A technology of surveying equipment and rotating mirror, applied in the field of surveying equipment, can solve the problems of negative impact on measurement accuracy, increased stress risk of rotating mirror, threat of flatness of rotating mirror, etc., and achieves the effect of reducing stress risk and avoiding assembly errors

Active Publication Date: 2015-04-29
HEXAGON TECH CENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of gluing and the differential thermal expansion between the rotating mirror and holder also lead to an increased risk of stresses inside the rotating mirror in case of temperature changes
If the stresses do not become unduly great and this does not lead to fragmentation and detachment of the mirror, in the case of corresponding stresses the flatness of the rotating mirror is still compromised, which has a negative effect on the deflection of the transmitted beam as well as the received beam, thus has a negative impact on measurement accuracy

Method used

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  • Surveying device having a rotation mirror for optically scanning an environment
  • Surveying device having a rotation mirror for optically scanning an environment
  • Surveying device having a rotation mirror for optically scanning an environment

Examples

Experimental program
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Embodiment Construction

[0079] figure 1 A schematic diagram of a surveying device 1 according to the invention is shown, which is implemented as a laser scanner for optically scanning the environment of the surveying device 1 . The surveying device 1 has a measuring head with a housing 5 mounted on a base 3 rotatably about a base axis 4 . The base 3 is in turn mounted on a support 2, which is implemented here as a tripod.

[0080] The surveying device 1 has a cylindrical rotary unit 10 with a rotary mirror 22 driven to rotate about its cylinder axis 11 by an electric motor 15 arranged in a motor housing 14, as figure 1 indicated by dashed lines. as well figure 1 Schematically indicated by a dotted line, a light source 6 for generating an emitted light beam 13 is arranged in a part of the housing 5 opposite the rotary unit 10 , which is embodied in particular as a laser light source 6 and which is capable of emitting a modulated, in particular pulsed, laser beam . Furthermore, a photosensitive de...

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PUM

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Abstract

Some embodiments of the invention relate to a rotation unit for a surveying device, in particular a laser scanner for optically scanning an environment and such a surveying device. The surveying device has a rotation unit having a rotation mirror, for deflecting an emission light beam and a reception light beam, and a rotation body implemented as a cylinder having a on a beveled, free end. The rotation body is implemented as a hollow cylinder having a cylinder bottom and a beveled cylinder wall on its free end. The hollow cylinder is connected coaxially with respect to its cylinder axis in a rotationally-fixed manner to a motor-driven shaft via the cylinder bottom. The rotation mirror is fastened in the region of its free end to the cylinder wall of the hollow cylinder so it is supported thereby.

Description

technical field [0001] The invention relates to a surveying device, in particular a laser scanner for optically scanning an environment, and a swivel unit for such a surveying device. The surveying device has a swivel unit with a swivel mirror for deflecting the transmitted light beam and the received light beam, and a swivel body embodied as a cylinder with a beveled free end. Background technique [0002] Three-dimensional objects or surfaces are recorded using such surveying equipment. In this case, they continuously scan such a three-dimensional structure, for example that of a building, using laser pulses, and then calculate from the received returned reflected pulses a corresponding three-dimensional model describing the surface of the object. [0003] The device is implemented as a laser scanner for optically scanning an environment, typically comprising a measuring head mounted on a base, relative to which the measuring head is rotatable about a base rotation axis. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/00
CPCG01S7/4817G02B7/1821G02B26/105G01C15/002
Inventor K·H·普兰杰尔T·迈尔J·舍加
Owner HEXAGON TECH CENT GMBH
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