(Abstract) Pressure measurements are required in various industrial applications, including extremely harsh environments such as turbine engines, power plants and material-processing systems. Conventional sensors are often difficult to apply due to the high temperatures, highly corrosive agents or electromagnetic interference (EMI) noise that may be present in those environments. Fiber optic pr...

In and post a fire event, an accurate and real-time evaluation and monitoring of a structure’s performance can assist firefighters for efficient survivor rescuing, which significantly improve the fire rescuing safety both for fire fighters and the trapped survivors. However, due to the lack of durable sensors, the structural performance of steel structures in fire conditions is challenging to b...

In this work, a corrosion sensor based on an optical time domain reflectometer was presented. The first with bare tip used to measure the process of silica glass fiber. Another deposited silver layer for monitoring in nitric acid. both cases, reflectance at end fiber decreasing immersion time. Thus we can describe stage by level fresnel reflectance. maximum sensitivities analyzed sensors were a...

A novel probe-type FPI-based fiber optic hydrogen sensor with a graphene–Au–Pd sandwich structure film and FBG is proposed experimentally demonstrated in this study.

Splanchnic organs are particularly vulnerable to hypoperfusion. Currently, there is no technique that allows for the continuous estimation of splanchnic blood oxygen saturation (SpO(2)). As a preliminary to developing a suitable splanchnic SpO(2) sensor, a new reflectance fiber optic photoplethysmographic (PPG) sensor and processing system are developed. An experimental procedure to examine the...

We propose and demonstrate an optical voltage sensing scheme based on a macrobending optical fiber in a ratiometric power measurement system. This novel approach to sensing has not been utilized before and has the advantage that the sensor involves simple fabrication compared to existing fiberoptic voltage sensors. To prove the feasibility of such a fiber-optic sensor, a sensor for a voltage ra...

This paper presents the first prototype of a magnetic resonance imaging (MRI) compatible piezoelectric actuated robot integrated with a high-resolution fiber optic sensor for prostate brachytherapy with real-time in situ needle steering capability in 3T MRI. The 6-degrees-of-freedom (DOF) robot consists of a modular 3-DOF needle driver with fiducial tracking frame and a 3-DOF actuated Cartesian...

meter-thick optode membrane is a common problem in optic-fiber sensor design. Many methods have been published for slowing down the leaching process. Covalent binding of dye molecules on suitable matrices is one of the most efficient immobilization methods.1–7 Recently, we have described a new optic-fiber sensor for tetracycline antibiotics based on covalently immobilized anthracene.8 A distinc...