A laser measurement system with multi-degree-of-freedom

2008 ◽  
Author(s):  
Lingli Long ◽  
Liangen Yang ◽  
Xuanze Wang ◽  
Zhongsheng Zhai
Keyword(s):  
Measurement System ◽  
Degree Of Freedom ◽  
Laser Measurement ◽  
Laser Measurement System

scholarly journals Error Analysis and Compensation of a Laser Measurement System for Simultaneously Measuring Five-Degree-of-Freedom Error Motions of Linear Stages

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3833 ◽  
Author(s):  
Yindi Cai ◽  
Qi Sang ◽  
Zhi-Feng Lou ◽  
Kuang-Chao Fan
Keyword(s):  
Measurement System ◽  
Measurement Accuracy ◽  
Measurement Model ◽  
Degree Of Freedom ◽  
Linear Stage ◽  
Laser Measurement ◽  
Beam Spot ◽  
Error Sources ◽  
Laser Measurement System ◽  
Dual Beam

A robust laser measurement system (LMS), consisting of a sensor head and a detecting part, for simultaneously measuring five-degree-of-freedom (five-DOF) error motions of linear stages, is proposed and characterized. For the purpose of long-travel measurement, all possible error sources that would affect the measurement accuracy are considered. This LMS not only integrates the merits of error compensations for the laser beam drift, beam spot variation, detector sensitivity variation, and non-parallelism of dual-beam that have been resolved by the author’s group before, but also eliminates the crosstalk errors among five-DOF error motions in this study. The feasibility and effectiveness of the designed LMS and modified measurement model are experimentally verified using a laboratory-built prototype. The experimental results show that the designed LSM has the capability of simultaneously measuring the five-DOF error motions of a linear stage up to one-meter travel with a linear error accuracy in sub-micrometer and an angular error accuracy in sub-arcsecond after compensation.

A four-degree-of-freedom laser measurement system (FDMS) using a single-mode fiber-coupled laser module

2005 ◽  
Vol 125 (1) ◽  
pp. 100-108 ◽  
Author(s):  
Cuifang Kuang ◽  
Qibo Feng ◽  
Bin Zhang ◽  
Bin Liu ◽  
Shiqian Chen ◽  
...  
Keyword(s):  
Measurement System ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Degree Of Freedom ◽  
Laser Measurement ◽  
Laser Measurement System ◽  
Laser Module

scholarly journals Research on Laser Measurement System for Underground Unmanned Load-Haul-Dump

2015 ◽  
Vol 9 (1) ◽  
pp. 916-921
Author(s):  
Li Jianguo ◽  
Zhan kai ◽  
Li Hengtong ◽  
Guo Xin
Keyword(s):  
Data Processing ◽  
Measurement System ◽  
Processing System ◽  
Serial Port ◽  
Laser Measurement ◽  
Data Processing System ◽  
Laser Measurement System

A method of data processing for the laser measurement system (LMS) based on the software LABVIEW which is used for underground unmanned Load-Haul-Dump (LHD) is described. The background of the technology is recommended firstly, the characteristics of LABVIEW and LMS are introduced briefly. How to process the data from LMS using LABVIEW including the algorithm for decoding the data and the frame of programming thought is described in detail. The design of data processing system with a serial port debugging system is expounded. Finally, the system is applied on a model LHD and it is proved that the system has feasibility and wide applying prospects for unmanned LHD.

Study of an Reverse Fourier Laser Measurement System

2015 ◽  
Vol 52 (2) ◽  
pp. 021202
Author(s):  
王亚民 Wang Yamin ◽  
张婧雯 Zhang Jingwen
Keyword(s):  
Measurement System ◽  
Laser Measurement ◽  
Laser Measurement System

scholarly journals Using a laser measurement system for monitoring morphological changes on the Strug rock fall, Slovenia

2005 ◽  
Vol 5 (1) ◽  
pp. 143-153 ◽  
Author(s):  
M. Mikoš ◽  
A. Vidmar ◽  
M. Brilly
Keyword(s):  
Fixed Points ◽  
Cross Sections ◽  
Measurement System ◽  
High Performance ◽  
Morphological Changes ◽  
Ground Surface ◽  
Rock Fall ◽  
Laser Measurement ◽  
Laser Measurement System ◽  
Surface Changes

Abstract. A medium-ranged high performance handheld reflectorless laser measurement system, was used for a morphological survey on the Strug rock fall in W Slovenia in the period from August 2003 to August 2004. The purpose was to evaluate its potential for monitoring ground surface changes in rock fall source areas and to help evaluating morphological changes by measuring distance from fixed points. In the area, 21 fixed geodetic points have been established. Altogether, seven measurement sets with more than 5500 points have been gathered in the rock fall area. Choosing a point cloud with a density of less than 1 point per 10m2 on a very rough rock fall surface failed to be a good solution. The changes on larger areas were shown by displacements of selected significantly large-sized rock blocks with a volume of several m3. Because only smaller changes were observed between the single field series, the rock fall surface generally remained unchanged. Local surface changes of the order of 1 m or more, were clearly shown by measurements in the selected referenced cross sections. The usage of these cross sections gave a possibility to evaluate volumetric changes on the surface. The laser measurement system provided a good replacement for the classical terrestrial geodetic survey equipment, especially when performing remote monitoring of morphological changes in rock fall hazard zones, however, the case is different when fixed points are to be measured precisely.

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