High-temperature high-precision casing-mounted optical sensors for in-situ measurement of blade vibration in rotating turbo machinery

1999 ◽  
Author(s):  
Michael M. Ross ◽  
Dennis Crommentuijn-Marsh
Keyword(s):  
High Temperature ◽  
High Precision ◽  
Optical Sensors ◽  
In Situ Measurement ◽  
Blade Vibration ◽  
Turbo Machinery

scholarly journals Development of EXAFS Apparatus for in-situ Measurement of High-Temperature Molten Materials.

1993 ◽  
Vol 32 (6) ◽  
pp. 444-446
Author(s):  
Kazuhiko Omote ◽  
Atsunori Kiku ◽  
Manabu Funahashi ◽  
Kazuyuki Tohji ◽  
Yoshio Waseda
Keyword(s):  
High Temperature ◽  
In Situ Measurement ◽  
Molten Materials

High-precision in situ measurement of speed of sound in hydraulic systems

2019 ◽  
Vol 234 (3) ◽  
pp. 299-313
Author(s):  
Nigel Johnston
Keyword(s):  
High Precision ◽  
Speed Of Sound ◽  
Pressure Transducer ◽  
In Situ Measurement ◽  
Frequency Domain Method ◽  
Hydraulic Systems ◽  
Mean Flow ◽  
Transducer Calibration ◽  
Mean Flow Velocity

An existing ISO standard frequency-domain method for measurement of speed of sound in a hydraulic pipeline is enhanced and extended in this article to include in situ measurement of pressure transducer calibration factors. Transducer mounting stresses are shown to cause variations in the calibration factors, and the proposed method can be used to eliminate these uncertainties, consequently improving the accuracy of the speed of sound. 95% confidence ranges in the speed of sound of less than ±0.1% have been achieved, and such high precision cannot be achieved by other practical methods. The method can also been extended to estimate viscosity and mean flow velocity, but accuracy is less good. Novel time-domain versions of the method are introduced. These may be valuable for real-time monitoring, and changes in speed of sound or calibration factor can be tracked with minimal delay. Some examples showing the effect of sudden aeration are presented; a sudden drop in speed of sound is apparent.

In situ measurement of high-temperature thermal diffusivity in a combustion-synthesized ceramic

2003 ◽  
Vol 33 (1) ◽  
pp. 31-39 ◽  
Author(s):  
D. Vrel ◽  
S. Dubois ◽  
E.M. Heian ◽  
N. Karnatak ◽  
M.-F. Beaufort
Keyword(s):  
High Temperature ◽  
Thermal Diffusivity ◽  
In Situ Measurement

scholarly journals A High Temperature Capacitive Pressure Sensor Based on Alumina Ceramic for in Situ Measurement at 600 °C

Sensors ◽  
2014 ◽  
Vol 14 (2) ◽  
pp. 2417-2430 ◽  
Author(s):  
Qiulin Tan ◽  
Chen Li ◽  
Jijun Xiong ◽  
Pinggang Jia ◽  
Wendong Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Pressure Sensor ◽  
Alumina Ceramic ◽  
In Situ Measurement ◽  
Capacitive Pressure Sensor

scholarly journals In-Situ Measurement of High-Temperature Proton Exchange Membrane Fuel Cell Stack Using Flexible Five-in-One Micro-Sensor

Sensors ◽  
2016 ◽  
Vol 16 (10) ◽  
pp. 1731 ◽  
Author(s):  
Chi-Yuan Lee ◽  
Fang-Bor Weng ◽  
Yzu-Wei Kuo ◽  
Chao-Hsuan Tsai ◽  
Yen-Ting Cheng ◽  
...  
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
In Situ Measurement ◽  
Fuel Cell Stack ◽  
Micro Sensor ◽  
Exchange Membrane
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