Temperature and displacement measurement system with fiber optic sensors for turbine blades

2006 ◽  
Author(s):  
Yutian Wang ◽  
Yongjing Zhu
Keyword(s):  
Measurement System ◽  
Fiber Optic ◽  
Turbine Blades ◽  
Fiber Optic Sensors ◽  
Displacement Measurement

Design and Experimental Characterization of a Non Intrusive Measurement System of Rotating Blade Vibration

1993 ◽  
Author(s):  
P. Nava ◽  
N. Paone ◽  
G. L. Rossi ◽  
E. P. Tomasini
Keyword(s):  
Measurement System ◽  
Fiber Optic ◽  
Experimental Tests ◽  
Data Acquisition System ◽  
Fiber Optic Sensors ◽  
Experimental Characterization ◽  
Blade Vibration ◽  
Rotating Blade ◽  
Strain Gauge Measurements

A measurement system for non-intrusive monitoring of rotating blade vibration in turbomachines based on fiber optic sensors is presented. The design of the whole system is discussed; the development of special purpose sensors, their interfacing to the data acquisition system and the signal processing are outlined. The processing algorithms are tested by software simulation for several possible blade vibrations. Experimental tests performed on different bladed rotors are presented. Results are compared to simultaneous strain gauge measurements.

scholarly journals Fatigue Behavior of Smart Composites with Distributed Fiber Optic Sensors for Offshore Applications

2021 ◽  
Vol 6 (1) ◽  
pp. 2
Author(s):  
Monssef Drissi-Habti ◽  
Venkadesh Raman
Keyword(s):  
Composite Structures ◽  
Large Scale ◽  
Fiber Optic ◽  
Fatigue Behavior ◽  
Turbine Blades ◽  
Mechanical Tests ◽  
Fiber Optic Sensors ◽  
Fatigue Tests ◽  
Offshore Wind ◽  
Smart Composites

Continuous inspection of critical zones is essential to monitor the state of strain within offshore wind blades, thus, enabling appropriate actions to be taken when needed to avoid heavy maintenance. Wind-turbine blades contain various substructures made of composites, sandwich panel, and bond-joined parts that need reliable Structural Health Monitoring (SHM) techniques. Embedded, distributed Fiber-Optic Sensors (FOS) are one of the most promising techniques that are commonly used for large-scale smart composite structures. They are chosen as monitoring systems for their small size, being noise-free, and low electrical risk characteristics. In recent works, we have shown that embedded FOSs can be positioned linearly and/or in whatever position with the scope of providing pieces of information about actual strain in specific locations. However, linear positioning of distributed FOS fails to provide all strain parameters, whereas sinusoidal sensor positioning has been shown to overcome this issue. This method can provide multiparameter strains over the whole area when the sensor is embedded. Nevertheless, and beyond what a sensor can offer as valuable information, the fact remains that it is a “flaw” from the perspective of mechanics and materials. In this article and through some mechanical tests on smart composites, evidence was given that the presence of embedded FOS influences the mechanical behavior of smart composites, whether for quasi-static or fatigue tests, under 3-point bending. Some issues directly related to the fiber-architecture have to be solved.

Design and Experimental Characterization of a Nonintrusive Measurement System of Rotating Blade Vibration

1994 ◽  
Vol 116 (3) ◽  
pp. 657-662 ◽  
Author(s):  
P. Nava ◽  
N. Paone ◽  
G. L. Rossi ◽  
E. P. Tomasini
Keyword(s):  
Measurement System ◽  
Fiber Optic ◽  
Experimental Tests ◽  
Fiber Optic Sensors ◽  
Experimental Characterization ◽  
Blade Vibration ◽  
Rotating Blade ◽  
Nonintrusive Measurement ◽  
Nonintrusive Monitoring

A measurement system for nonintrusive monitoring of rotating blade vibration in turbomachines based on fiber optic sensors is presented. The design of the whole system is discussed; the development of special purpose sensors, their interfacing to the data acquisition system, and the signal processing are outlined. The processing algorithms are tested by software simulation for several possible blade vibrations. Experimental tests performed on different bladed rotors are presented. Results are compared to simultaneous strain gage measurements.

Nursing Movement Monitoring System Utilizing Hetero-core Fiber Optic Sensors Embedded in Medical Thin Films

2018 ◽  
Vol 138 (12) ◽  
pp. 525-532
Author(s):  
Masahiko Ito ◽  
Yuya Koyama ◽  
Michiko Nishiyama ◽  
Emi Yanagisawa ◽  
Mariko Hayashi ◽  
...  
Keyword(s):  
Thin Films ◽  
Monitoring System ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Core Fiber ◽  
Movement Monitoring
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