High temperature monitoring using a novel fiber optic ultrasonic sensing system

This paper presents a novel fiber optic ultrasonic sensing system to measure high temperature in the air. Traveling velocity of sound in a medium is proportional to medium’s temperature. The fiber optic ultrasonic sensing system was applied to measure the change of sound velocity. A fiber optic ultrasonic generator and a Fabry-Perot fiber sensor were used as the signal generator and receiver, respectively. A carbon black- Polydimethylsiloxane (PDMS) material was utilized as the photoacoustic material for the fiber optic ultrasonic generator. A water cooling system was applied to cool down the photoacoustic material. A test was performed at lab furnace environment (up to 700 ℃). The sensing system survived 700℃. It successfully detect the ultrasonic signal and got the temperature measurements. The test results agreed with the reference sensor data. The paper validated the high temperature measurement capability of the novel fiber optic ultrasonic sensing system. The fiber optic ultrasonic sensing system could have broad applications. One example is that it could serve as acoustic pyrometers for 3D temperature distribution reconstruction in an industrial combustion facility

[1]  Nan Wu,et al.  Ultrasound generation from an optical fiber sidewall , 2016, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[2]  Matthew O'Donnell,et al.  Broadband all-optical ultrasound transducers , 2007 .

[3]  Bowei Zhang,et al.  High-Temperature Resistance Fiber Bragg Grating Temperature Sensor Fabrication , 2007, IEEE Sensors Journal.

[4]  C L Chen,et al.  Optical fiber Fabry-Perot sensors. , 1988, Applied optics.

[5]  Lei Zhai,et al.  Structural Evolution of Polymer-Derived Amorphous SiBCN Ceramics at High Temperature , 2011 .

[6]  B. Dong,et al.  Multiplexed high temperature sensing with sapphire fiber air gap-based extrinsic Fabry-Perot interferometers. , 2010, Optics letters.

[7]  Xiaotian Zou,et al.  Fiber optic ultrasound transmitters and their applications , 2016 .

[8]  E. Salerno,et al.  An acoustic pyrometer system for tomographic thermal imaging in power plant boilers , 1996 .

[9]  Nan Wu,et al.  Ultrasound generation from side wall of optical fibers , 2017, 2017 16th International Conference on Optical Communications and Networks (ICOCN).

[10]  Nan Wu,et al.  Ultrasonic temperature measurements with fiber optic system , 2016, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[11]  Christopher Niezrecki,et al.  Ultrafast Fabry-Perot fiber-optic pressure sensors for multimedia blast event measurements. , 2013, Applied optics.

[12]  Xiaotian Zou,et al.  High-efficiency optical ultrasound generation using one-pot synthesized polydimethylsiloxane-gold nanoparticle nanocomposite , 2012 .

[13]  Xun Gong,et al.  Characterization of high-temperature ceramic materials at microwave frequencies for MEMS applications , 2009, 2009 IEEE 10th Annual Wireless and Microwave Technology Conference.

[14]  Nan Wu,et al.  Water temperature measurement using a novel fiber optic ultrasound transducer system , 2015, 2015 IEEE International Conference on Information and Automation.

[15]  Chengying Xu,et al.  Making Bulk Ceramics from Polymeric Precursors , 2010 .

[16]  Xiaotian Zou,et al.  A novel Fabry-Perot fiber optic temperature sensor for early age hydration heat study in Portland ce , 2013 .