Fiber-optic angle sensor based on an extrinsic Fabry-Perot cavity

被引：4

作者：

Lu, Tao ^{[1
,2
]}

Li, Zhengjia ^{[1
]}

Du, Qiujiao ^{[1
,2
]}

Bi, Jie ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Optoelect Sci & Engn, Wuhan 430074, Peoples R China

[2] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2008年 / 148卷 / 01期

关键词：

Fiber-optic sensors; Fabry-Perot cavity; Infinite angle; Linear region;

D O I：

10.1016/j.sna.2008.07.026

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The purpose of this study has been devoted to the presentation and demonstration of an extrinsic Fabry-Perot cavity (EFPC) fiber-optic angle sensor, which consists of a cam, linear displacement attenuators, and an EFPC. An angle can be transformed into a linear displacement that is subsequently attenuated by linear displacement attenuators to modulate the EFPC when the cam is driven to rotate by a rotary object, which causes the output intensity of EFPC to vary. In order to fully demonstrate the advantages of EFPC, based on the multi-period characteristics of EFPC output and cam rotation, it is shown that an infinite angle can be measured accurately and continuously by counting the number of fringes whereas a small angle can be measured in a locally linear region of response function of EFPC. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：83 / 87

页数：5

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