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Optical Engineering • Open Access

Study of network topology effect on measurement accuracy for a distributed rotary-laser measurement system
Author(s): Siyang Guo; Jiarui Lin; Yongjie Ren; Linghui Yang; Jigui Zhu

Paper Abstract

The workshop Measurement Positioning System (wMPS) is a large-scale measurement system that better copes with the current challenges of dimensional metrology. However, as a distributed measuring system with multiple transmitters forming a spatial measurement network, the network topology of transmitters relative to the receiver exerts a significant influence on the measurement accuracy albeit one that is difficult to quantify. An evaluation metric, termed the geometric dilution of precision (GDOP), is introduced to quantify the quality of the network topology of the wMPS. The GDOP is derived from the measurement error model of wMPS and its mathematical derivation is expounded. Two significant factors (density and layout of the transmitter) affecting the network topology are analyzed by simulations and experiments. The experimental results show that GDOP is approximately proportional to the measurement error. More transmitters, and a relatively good layout thereof, can decrease the value of GDOP and the measurement error.

Paper Details

Date Published: 9 September 2017
PDF: 8 pages
Opt. Eng. 56(9) 094101 doi: 10.1117/1.OE.56.9.094101
Published in: Optical Engineering Volume 56, Issue 9
Show Author Affiliations
Siyang Guo, Tianjin Univ. (China)
Jiarui Lin, Tianjin Univ. (China)
Yongjie Ren, Tianjin Univ. (China)
Linghui Yang, Tianjin Univ. (China)
Jigui Zhu, Tianjin Univ. (China)

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