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High Temperatures Health Monitoring of the Condensed Water Height in Steam Pipe SystemsUltrasonic probes were designed, fabricated and tested for high temperature health monitoring system. The goal of this work was to develop the health monitoring system that can determine the height level of the condensed water through the pipe wall at high temperature up to 250 deg while accounting for the effects of surface perturbation. Among different ultrasonic probe designs, 2.25 MHz probes with air backed configuration provide satisfactory results in terms of sensitivity, receiving reflections from the target through the pipe wall. A series of tests were performed using the air-backed probes under irregular conditions, such as surface perturbation and surface disturbance at elevated temperature, to qualify the developed ultrasonic system. The results demonstrate that the fabricated air-backed probes combined with advanced signal processing techniques offer the capability of health monitoring of steam pipe under various operating conditions.
Document ID
20150007419
Document Type
Conference Paper
External Source(s)
Authors
Lih, Shyh-Shiuh (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bar-Cohen, Yoseph (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lee, Hyeong Jae (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Badescu, Mircea (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bao, Xiaoqi (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sherrit, Stewart (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Takano, Nobuyuki (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ostlund, Patrick (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Blosiu, Julian (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 6, 2015
Publication Date
March 10, 2013
Subject Category
Fluid Mechanics and Thermodynamics
Meeting Information
SPIE Smart Structures and Materials/NDE Symposium(San Diego, CA)
Distribution Limits
Public
Copyright
Other
Keywords
High Temperatures (HT)
fluid height monitoring
sensors
health monitoring
monitoring steam condensation
HT piezoelectric transducers