2Davis C, Mazzolini A, Murphy D. A new fibre-optic sensor for respiratory monitoring[ J ]. Australasian Physical & Engineering Sciences in Medicine,1997,20:214--219.
3Nitzan M, Babchenko A,Turinvenko S,et al. Assessment of breathing effort by means of a fiber optic sensor[ C]///San Jose: SPIE,1997:89 -93.
4Babchenko A, Maryles J. Graded-index plastic optical fiber for deformation sensoring[ J]. Optics and Lasers in Engineering,2007, 45:757 --760.
5Sienkiewicz F, Shukla A. Simple fiber optic sensor for use over a large displacement range [ J ]. Optics and Lasers in Engineering, 1997,28 (4) :293 --304.
6Lee A D. Fiber optic bending and positioning sensor with selected curved light emission surfaces : US ,5633494 [ P ]. 1997-05-27.
7Yang Jun, Yuan Libo, Zu Xiaoliang, et al. Twin-core fiber white light interferometeric bending sensor [ C ]//Perth : SPIE, 2008 : 70040Y-1-70040Y-4.
8Gander M J,Macrae D, Galliot E A C, et al. Two-axis bend measurement using multicore optical fiber [ J ]. Optics Communications ,2000,182 : 115-121.
9Yuan Libo,Wang Xue. Multi-parameters measurement by using a four-core fiber [ C ]//Harbin : SPIE,2007, 65952 Q-1---65952 Q-7.
10Wang Yiping, Rao Yunjiang. A novel long period fiber grating sensor measuring curvature and determining bend-direction simultaneously[ J]. IEEE Sensors Journal,2005,5 (5) :839 -843.