Experimental Investigation on Temperature Monitoring Capability Of Ni-Ti-Cu Shape Memory Alloy Coated Optical Fiber in Oil

Abstract

Real-time oil temperature monitoring in hydraulic systems is challenging and needs robust technology to survive the noisy environment. In this work the performance of Shape Memory Alloy coated Single-mode optical fiber has been investigated for in-situ oil temperature monitoring. With the increase in Oil temperature, significant optical intensity changes have been recorded within the phase-transition range of Shape Memory Alloy. An accuracy of &#x00B1

1.351 and a sensitivity of 16mV/&#x00B0

C has been obtained with good precision. The influence of coating thickness was analyzed, and improved results were obtained for the thick sample. Moreover, the impact of oil viscosity has been explored by considering the Mineral, Edible, and Hydraulic Oil for testing. The sensitivity was not much affected by the oil viscosity. However, the accuracy was reduced in the less viscous Mineral oil. The technology proposed is robust and can leverage oil monitoring with remote sensing capabilities at low cost and easy employability. IEEE