scholarly journals Design, Fabrication and Testing of a High-Sensitive Fibre Sensor for Tip Clearance Measurements

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2610 ◽  
Author(s):  
Gaizka Durana ◽  
Josu Amorebieta ◽  
Ruben Fernandez ◽  
Josu Beloki ◽  
Eneko Arrospide ◽  
...  
Keyword(s):  
Optical Sensor ◽  
Fibre Bundle ◽  
Single Mode ◽  
Measurement Range ◽  
Tip Clearance ◽  
Experimental Program ◽  
Linear Calibration ◽  
Distance Measurements ◽  
Reflected Light ◽  
Highly Sensitive

A highly sensitive fibre bundle-based reflective optical sensor has been designed and fabricated for Tip Clearance measurements in a turbine rig. The sensor offers high spatial and temporal resolution. The sensor probe consists of a single-mode transmitting fibre and two concentric rings of receiving multimode fibres that collect reflected light in a differential detection gain configuration, yielding a highly linear calibration curve for distance measurements. The clearance measurement range is approximately 2 mm around the central point fixed at 3.2 mm from the probe tip, and the sensitivity of the probe is 61.73 mm−1. The fibre bundle has been designed to ensure that the distance security specifications required for the experimental program of the turbine are met. The optical sensor has operated under demanding conditions set by the blade and casing design. The experimental results obtained so far are promising and lead us to think that the optical sensor has great potential for online clearance measurements with high precision.

scholarly journals Review of a Custom-Designed Optical Sensing System for Aero-Engine Applications

2021 ◽  
Vol 6 (1) ◽  
pp. 3
Author(s):  
Rubén Fernández ◽  
Josu Amorebieta ◽  
Iker García ◽  
Gotzon Aldabaldetreku ◽  
Joseba Zubia ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Optical Sensor ◽  
Fibre Bundle ◽  
Tip Clearance ◽  
Experimental Program ◽  
Optical Technology ◽  
Sensing System ◽  
Aero Engine ◽  
Aero Engines ◽  
Transonic Wind Tunnel

Fibre bundle-based reflective optical sensors are good candidates for parameter monitorisation in aero engines. Tip clearance is one of those parameters of great concern that is necessary to monitor. Within this optical technology, the evolution experienced by a custom-designed optical sensor is presented from its first configuration up to the fifth one. The performance of the last configuration is compared with those of other two optical sensors that are also based on a fibre bundle design. The comparison has been carried out in an experimental program in a transonic wind tunnel for aero engines. The proven high resolution and sensitivity of the last configuration of the optical sensor opens up the possibility to detect blade defects, cracks, etc. that could otherwise be hard to track.

scholarly journals Performance Comparison of Three Fibre-Based Reflective Optical Sensors for Aero Engine Monitorization

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2244 ◽  
Author(s):  
Rubén Fernández-Bello ◽  
Josu Amorebieta ◽  
Josu Beloki ◽  
Gotzon Aldabaldetreku ◽  
Iker García ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Fibre Bundle ◽  
Performance Comparison ◽  
Tip Clearance ◽  
Experimental Program ◽  
Optical Technology ◽  
Aero Engine ◽  
Aero Engines ◽  
Transonic Wind Tunnel ◽  
Interesting Alternative

Among the different available optical technologies, fibre bundle-based reflective optical sensors represent an interesting alternative for parameter monitorization in aero engines. Tip clearance is one of the parameters of great concern for engine designers and engineers. In the framework of this optical technology, three fibre-based reflective optical sensors have been compared. Two of them are custom designed and based on the same geometrical fibre arrangement, whereas the third one is commercially available and relies on a different geometrical arrangement of the fibres. Their performance has been compared in clearance measurements carried out during an experimental program followed at a transonic wind tunnel for aero turbines. The custom-designed solution that operates in the most sensitive part of its response curve proved to be by far the most reliable tool for clearance measurements. Its high resolution opens up the possibility to detect small blade features such as cracks, reflectivity changes, etc. that otherwise could not be tracked. These results show that the detection of unexpected features on blade tips may have an important effect on how the clearance is calculated, ultimately giving rise to corrective actions.

Highly sensitive digital optical sensor with large measurement range based on the dual-microring resonator with waveguide-coupled feedback

2014 ◽  
Vol 23 (3) ◽  
pp. 034206 ◽  
Author(s):  
Xing-Ye Xiang ◽  
Kui-Ru Wang ◽  
Jin-Hui Yuan ◽  
Bo-Yuan Jin ◽  
Xin-Zhu Sang ◽  
...  
Keyword(s):  
Optical Sensor ◽  
Measurement Range ◽  
Microring Resonator ◽  
Highly Sensitive ◽  
Large Measurement

scholarly journals Compact omnidirectional multicore fiber-based vector bending sensor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Josu Amorebieta ◽  
Angel Ortega-Gomez ◽  
Gaizka Durana ◽  
Rubén Fernández ◽  
Enrique Antonio-Lopez ◽  
...  
Keyword(s):  
Single Mode ◽  
High Accuracy ◽  
Single Mode Fiber ◽  
Wavelength Shift ◽  
Short Segment ◽  
Light Power ◽  
Highly Sensitive ◽  
Bending Sensor ◽  
Asymmetric Multicore ◽  
Multicore Fiber

AbstractWe propose and demonstrate a compact and simple vector bending sensor capable of distinguishing any direction and amplitude with high accuracy. The sensor consists of a short segment of asymmetric multicore fiber (MCF) fusion spliced to a standard single mode fiber. The reflection spectrum of such a structure shifts and shrinks in specific manners depending on the direction in which the MCF is bent. By monitoring simultaneously wavelength shift and light power variations, the amplitude and bend direction of the MCF can be unmistakably measured in any orientation, from 0° to 360°. The bending sensor proposed here is highly sensitive even for small bending angles (below 1°).

scholarly journals Highly sensitive and selective liquid crystal optical sensor for detection of ammonia

2017 ◽  
Vol 25 (12) ◽  
pp. 13549 ◽  
Author(s):  
Xiaofang Niu ◽  
Yuanbo Zhong ◽  
Rui Chen ◽  
Fei Wang ◽  
Dan Luo
Keyword(s):  
Liquid Crystal ◽  
Optical Sensor ◽  
Highly Sensitive

Highly Sensitive Nanoscale Optical Sensor Based on Plasmonic Nanocavity Array

2020 ◽  
Author(s):  
Yunjie Shi ◽  
Guangyuan Li ◽  
Guoquan Liu ◽  
Liang Zhang ◽  
Degui Sun ◽  
...  
Keyword(s):  
Optical Sensor ◽  
Highly Sensitive
Sign in / Sign up

Export Citation Format

Share Document