Full Text:   <3222>

CLC number: TH741.4

On-line Access: 

Received: 2006-03-03

Revision Accepted: 2006-07-06

Crosschecked: 0000-00-00

Cited: 0

Clicked: 8516

Citations:  Bibtex RefMan EndNote GB/T7714

-   Go to

Article info.
1. Reference List
Open peer comments

Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.10 P.1772-1776


A laser shaft alignment system with dual PSDs

Author(s):  JIAO Guo-hua, LI Yu-lin, ZHANG Dong-bo, LI Tong-hai, HU Bao-wen

Affiliation(s):  Xi’ more

Corresponding email(s):   ghjiao@opt.ac.cn

Key Words:  Rotating machine, Shaft alignment, Laser alignment, Position sensing detector (PSD), Laser micro-displacement measurement

JIAO Guo-hua, LI Yu-lin, ZHANG Dong-bo, LI Tong-hai, HU Bao-wen. A laser shaft alignment system with dual PSDs[J]. Journal of Zhejiang University Science A, 2006, 7(10): 1772-1776.

@article{title="A laser shaft alignment system with dual PSDs",
author="JIAO Guo-hua, LI Yu-lin, ZHANG Dong-bo, LI Tong-hai, HU Bao-wen",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T A laser shaft alignment system with dual PSDs
%A JIAO Guo-hua
%A LI Yu-lin
%A ZHANG Dong-bo
%A LI Tong-hai
%A HU Bao-wen
%J Journal of Zhejiang University SCIENCE A
%V 7
%N 10
%P 1772-1776
%@ 1673-565X
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A1772

T1 - A laser shaft alignment system with dual PSDs
A1 - JIAO Guo-hua
A1 - LI Yu-lin
A1 - ZHANG Dong-bo
A1 - LI Tong-hai
A1 - HU Bao-wen
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 10
SP - 1772
EP - 1776
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.A1772

shaft alignment is an important technique during installation and maintenance of a rotating machine. A high-precision laser alignment system has been designed with dual PSDs (Position Sensing Detector) to change traditional manual way of shaft alignment and to make the measurement easier and more accurate. The system is comprised of two small measuring units (laser transmitter and detector) and a PDA (Personal Digital Assistant) with measurement software. The laser alignment system with dual PSDs was improved on a single PSD system, and yields higher measurement accuracy than the previous design, and has been successful for designing and implements actual shaft alignment. In the system, the range of offset measurement is ±4 mm, and the resolution is 1.5 μm, with accuracy being less than 2 μm.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


[1] Brommundt, E., Krämer, E., 2005. Instability and self-excitation caused by a gear coupling in a simple rotor system. Forschung im Ingenieurwesen, 70(1):25-37.

[2] Hamamatsu Photonics, 2001. Operating Principle and Features of PSD. Hamamatsu, Japan.

[3] Jiao, G.H., Li, Y.L., Hu, B.W., 2006. Development of the Laser Alignment System with PSD Used for Shaft Calibration. Proceedings of SPIE—The International Society for Optical Engineering, 6150:61500.

[4] Jin, G.F., Li, J.Z., 1998. Method of Laser Measurement. Science Press, Beijing, China, p.697-700 (in Chinese).

[5] Lee, G., 2004. Taking Accurate Vibration Measurements. Http://www.mt-online.com/articles/index.cfm

[6] Luedeking, A., 2003. Using Lasers to Align Cooling Tower Fans. Http://www.rsesjournal.com

[7] Luedeking, A., 2005. Laser Alignment Verification—On Site at the Largest Gas Turbine in the US. Http://www.ludeca.com/casestudy.htm

[8] Pan, H.J., Liu, Y., Chen, J., 2005. Analysis of the link state of a coupling. Mechanical Science and Technology, 24(8):894-897 (in Chinese).

[9] Perry, S., 1998. Dealing with positional change of on-line machinery. Maintenance Technology, 11(10):44-52.

[10] Perry, S., 2001. Alignment Monitoring and Correction of a Turbine Driven Feed Water Pump. Http://www.ludeca.com

[11] Piotrowski, J., 1995. Shaft Alignment Handbook (2nd Ed.). Marcel Dekker Inc., New York, p.67-69, 115-118.

[12] Studenberg, D., 2002. Precision Shaft Alignment: What’s the Right Method for You? Http://www.mt-online.com/articles/index.cfm

[13] Texas Instruments, 2002. Datasheet of MSC1210. Http://www.ti.com

[14] VibrAlign Inc., 2002. Dynamic Movement White Paper. Http://www.vibralign.com

Open peer comments: Debate/Discuss/Question/Opinion


Please provide your name, email address and a comment

Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE