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Device and method for determining changes of positions of 3D measuring head

A measuring head, 3D technology, applied in measuring devices, measuring instruments, radio wave measuring systems, etc., can solve problems such as inability to record spherically

Inactive Publication Date: 2015-07-22
AIMESS SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this last-mentioned method has the big drawback that it can only work in the case of objects with distinct features
Therefore, in principle, it is not possible to record on spheres
Consequently, the mathematically oriented methods known hitherto only work reliably within a very limited range of subjects.

Method used

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  • Device and method for determining changes of positions of 3D measuring head

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Embodiment Construction

[0025] figure 1 A device according to the invention for determining a change in position of a 3D measuring head is shown schematically.

[0026] In this embodiment, the device 100 comprises: a 3D measuring head; at least one sensor 120 connected to the 3D measuring head for detecting a position-dependent measured quantity; The quantity is used to determine the position change of the 3D measuring head relative to the starting position to the end position; wherein, the position change includes movement in space and rotation in space. In this embodiment, the 3D measuring head is configured as a laser scanner, for example. The sensor 120 can be a magnetometer for measuring the magnitude and direction of a defined, predetermined magnetic field at the location of the sensor. In this case, a unit 140 can optionally be provided for generating an inhomogeneous magnetic field, which is detected by a magnetometer. Finally, the detected measured values ​​can be transmitted to an evalua...

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Abstract

The invention relates to a device for determining changes of positions of a 3D measuring head. The device comprises a 3D measuring head, at least a sensor device connected with the 3D measuring head, and an assessment device. The sensor device is used to detect corresponding measuring quantities which rely on positions. The assessment device is used to determine position changes of the 3D measuring head relative to an initial position to a final position through at least a detected measuring quantity. The position changes comprise movement in a space and rotation in the space. In addition, the invention also relates to a corresponding method.

Description

technical field [0001] The invention relates to a device and a method for determining a change in position of a 3D measuring head. Background technique [0002] In order to record different images of an object with a 3D measuring head, according to the prior art, three different methods have hitherto been used. First, markers or geometries (such as spheres) can be applied to the objects to be measured, these markers or geometries can be re-identified based on their relative position or by explicit encoding on different images, and then compared with each other. record in between. Second, positioning systems (e.g. robotic arms, 3D coordinate measuring machines) can be used that can accurately determine the position of the measuring head in space. Thirdly, as a general approach, only software algorithms (for example ICP) can be used which attempt to superimpose the different measured point clouds in such a way that the point clouds are generated in a consistent coordinate sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C15/00
CPCG01S17/89G01S7/4972G01S7/4808G01B21/047G01D5/20
Inventor 恩斯特·魏登曼
Owner AIMESS SERVICES