A novel weight measurement method based on birefringence in fiber Bragg gratings

doi:10.1007/s12200-008-0071-8

Front Optoelec Chin

2008, Vol. 1

Issue (3-4) : 226-230 https://doi.org/10.1007/s12200-008-0071-8

Research Article

A novel weight measurement method based on birefringence in fiber Bragg gratings

Yong ZHAO^1,2(

), Huawei ZHAO¹, Jian YANG²

1. College of Information Science and Engineering, Northeastern University; 2. Department of Automation, Tsinghua University

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Abstract

Unlike the usual wavelength modulation principle of fiber Bragg grating (FBG) sensors, a novel weight sensor based on birefringence in FBG is proposed in this paper. The creation of the birefringence is based on the different stresses of the two orthogonal directions in the fiber core cross-section. If weight is applied on an FBG in the radial direction, two reflection spectra with different polarization states which can be observed by an optical spectrum analyzer will occur. An experimental prototype is set up and the measurement principle is described in this paper. Preliminary experimental results indicate that the proposed measurement method is very suitable for the application of heavy weight measurement in the range of 20 tons, especially for vehicle load monitoring in highway charge-by-weight systems. The sensitivity of weight measurement is be estimated to be about 5 kg.

Keywords fiber Bragg grating (FBG) birefringence vehicle weighing charge-by-weight

Corresponding Author(s): ZHAO Yong,Email:zhaoy18@tsinghua.edu.cn

Issue Date: 05 September 2009

Cite this article:

Yong ZHAO,Huawei ZHAO,Jian YANG. A novel weight measurement method based on birefringence in fiber Bragg gratings[J]. Front Optoelec Chin, 2008, 1(3-4): 226-230.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-008-0071-8
https://academic.hep.com.cn/foe/EN/Y2008/V1/I3-4/226

Fig0 Principle of weight measurement

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