Scanning measuring device with thermally neutral axis

Abstract

The invention relates to a scanning measurement device with a thermal neutral axis, especially a laser scanner, a profiler, a total station or a tracker, the scanning measurement device at least includes: a base for placing the device; housing on a base; mounted in the housing so as to be rotatable about an axis of rotation and carrying the shaft of the beam deflection unit in a rotationally fixed manner; beam generation for generating the transmission beam emitted by the beam deflection unit into the environment unit; a beam receiving unit that receives a received beam reflected from the environment; a controllable positioning device for a drive shaft; wherein the shaft is supported by at least one pair of angular contact rolling bearings set in an O-shaped arrangement; and the angular contact rolling bearings are arranged on the shaft , so that the rolling contact lines of the associated angular contact rolling bearings substantially converge on the axis of rotation.

Description

technical field [0001] The invention relates to a scanning measuring device. Background technique [0002] In order to detect objects or surfaces, methods are often used which gradually scan the topography of structures such as buildings and record said topography in the process. In this case, such a topography constitutes a series of points which are consistent and describe the surface of the object or describe the corresponding model or describe the surface. The familiar method is scanning with the aid of a laser scanner, which in each case detects the physical position of the surface point: the distance to the target surface point is measured by the laser and this measurement is associated with angular information about the laser shot . From this distance and angle information, the physical positions of the respectively detected points can be determined and the surface can be continuously measured. Parallel to this purely geometric detection of the surface in many case...

AI Technical Summary

Problems solved by technology

These conventional mounts are complex in planning and construction, require more part and overall space, and do not provide optimal rigidity

[0008] Varying the preload over the operating temperature range is not desirable because measurements become inaccurate if the bearing clearance is amplified, and because with too high a bearing preload, friction increases resulting in a greater power demand, which is harmful to those with Battery-operated mobile measuring devices with limited capacity are particularly critical

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