Static Strain Modelling, Calibration, and Measurements for High-Temperature Wireless SAW Resonator Operation

Journal Article · Mon Sep 07 00:00:00 EDT 2020 · IEEE International Ultrasonics Symposium (IUS)

DOI:https://doi.org/10.1109/ius46767.2020.9251613· OSTI ID:2290244

Jilani, Syeda Fizzah ^[1]; Leff, David ^[2]; Maskay, Anin ^[3]; Lad, Robert J. ^[2]; da Cunha, Mauricio Pereira ^[2]

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1. University of Maine, Orono, ME (United States); University of Maine
2. University of Maine, Orono, ME (United States)
3. Environetix Technologies Corporation, Orono, ME (United States)

Static strain measurements are relevant for Integrated System Health Monitoring of civil structures, aircrafts, power plants and advanced manufacturing equipment, with implications for safety, process efficiency, and maintenance costs. Wireless strain sensing is highly desirable where the presence of wires poses significant safety concerns, increases maintenance, and thus overall costs, or where they are not feasible, such as in applications which contain moving parts. This paper presents wireless interrogation of surface acoustic wave resonators (SAWRs) fabricated on langasite (LGS) along Euler angles (0°, 138.5°, 32.9°) and aimed at the detection of static strain at hightemperature (HT, above 100°C). Both commercial HT strain gauges and finite element analysis (FEA Abaqus software) were used and compared for SAWR strain calibration from room temperature (RT) to HT. In addition, this work investigated a compromise between high temperature operation vs. sensitivity based on the thickness of ceramic adhesive used. For instance, a reduction in the adhesive thickness from about 150 μm to 135 μm, resulted in a 39% increase in sensitivity at RT. It was also observed that the sensitivity dropped up to 34% from RT to 200°C. Furthermore, wireless operation, calibration, and increase in sensitivity constitute important advances in the use of LGS SAW devices to monitor static stress in high-temperature harsh environments.

• Research Organization: University of Maine, Orono, ME (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy and Carbon Management (FECM)
• Grant/Contract Number: FE0031550
• OSTI ID: 2290244
• Journal Information: IEEE International Ultrasonics Symposium (IUS), Journal Name: IEEE International Ultrasonics Symposium (IUS); ISSN 1948-5719
• Publisher: IEEE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
harsh-environment
high-temperature
passive strain sensor component
wireless static strain monitoring