Design, study, and achievement of a fiber optic amplitude modulation sensor for angular position detection: application to an automotive steering sytem

Nicolas Javahiraly; Cédric Perrotton; Ayoub Chakari; Patrick Meyrueis

doi:10.1117/12.819936

29 April 2009 Design, study, and achievement of a fiber optic amplitude modulation sensor for angular position detection: application to an automotive steering sytem

Nicolas Javahiraly, Cédric Perrotton, Ayoub Chakari, Patrick Meyrueis

Author Affiliations +

Proceedings Volume 7314, Photonics in the Transportation Industry: Auto to Aerospace II; 731405 (2009) https://doi.org/10.1117/12.819936
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

The reliable, accurate and low cost measurement of angular position is an important challenge for numerous industries such as aerospace or automotive industries. We propose a new optical fiber angular position sensor connected to an automotive power steering column. This sensor allows the measurement of the angular position of a car steering wheel over a large range (± 3 turns of wheel). The wheel rotation induces micro-bending in the transducer part of the optical fiber sensing system. This system operates as an amplitude modulation sensor based on mode coupling in the transducing fiber in the case when all the modes are equally excited. We study the sensor's response both theoretically and experimentally with a multimode step index optical fiber [Rf (fiber radius) = 300μm; rc (core radius) = 50μm; n_c (core index) = 1,457; N.A. = 0, 22 and the wavelength is 632, 8 nm at the ambient Temperature (20°C)]. This sensor has been tested between (-3x360) and (+3x360) degrees with 0,147 sensitivity. We show that the sensitivity can be controlled as a function of the sensor's length and the study of the sensor's output power as a function of the angular position has been achieved. We compare modeling and experimental validation and we conclude by a perspective of what could be soon an industrial sensor.

Citation Download Citation

Nicolas Javahiraly, Cédric Perrotton, Ayoub Chakari, and Patrick Meyrueis "Design, study, and achievement of a fiber optic amplitude modulation sensor for angular position detection: application to an automotive steering sytem", Proc. SPIE 7314, Photonics in the Transportation Industry: Auto to Aerospace II, 731405 (29 April 2009); https://doi.org/10.1117/12.819936

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KEYWORDS

Sensors

Optical fibers

Amplitude modulation

Fiber optics

Fiber optics sensors

Position sensors

Aerospace engineering

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