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Sensors 2012, 12(8), 10001-10013; doi:10.3390/s120810001

Research on a Novel Low Modulus OFBG Strain Sensor for Pavement Monitoring

* ,
School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
* Author to whom correspondence should be addressed.
Received: 25 June 2012 / Revised: 16 July 2012 / Accepted: 17 July 2012 / Published: 25 July 2012
(This article belongs to the Section Physical Sensors)
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Because of the fatigue and deflection damage of asphalt pavement, it is very important for researchers to monitor the strain response of asphalt layers in service under vehicle loads, so in this paper a novel polypropylene based OFBG (Optical Fiber Bragg Gratings) strain sensor with low modulus and large strain sensing scale was designed and fabricated. PP with MA-G-PP is used to package OFBG. The fabrication techniques, the physical properties and the sensing properties were tested. The experimental results show that this kind of new OFBG strain sensor is a wonderful sensor with low modulus (about 1 GPa) and good sensitivity, which would meet the needs for monitoring some low modulus materials or structures.
Keywords: OFBG; strain measuring; low modulus; asphalt concrete OFBG; strain measuring; low modulus; asphalt concrete
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wang, C.; Hu, Q.; Lu, Q. Research on a Novel Low Modulus OFBG Strain Sensor for Pavement Monitoring. Sensors 2012, 12, 10001-10013.

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