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Article

High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings

1
Los Alamos National Laboratory, DARHT Experiments and Diagnostics, MS P940, Los Alamos, NM 87545, USA
2
Los Alamos National Laboratory, Advanced Engineering Analysis, MS A142, Los Alamos, NM 87545, USA
3
Lawrence Livermore National Laboratory, Environmental Test Group, L-125, Livermore, CA 94550, USA
4
Los Alamos National Laboratory, Dynamic Structure Design and Engineering, MS P942, Los Alamos, NM 87545, USA
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(20), 5935; https://doi.org/10.3390/s20205935
Received: 28 September 2020 / Revised: 13 October 2020 / Accepted: 15 October 2020 / Published: 20 October 2020
(This article belongs to the Special Issue Fiber Bragg Grating Based Sensors and Systems)
Dynamic elastic strain in ~1.8 and 1.0 m diameter containment vessels containing a high explosive detonation was measured using an array of fiber Bragg gratings. The all-optical method, called real-time localized strain measurement, recorded the strain for 10 ms after detonation with additional measurements being sequentially made at a rate of 1.7 MHz. A swept wavelength laser source provided the repetition rate necessary for such high-speed measurements while also providing enough signal strength and bandwidth to simultaneously measure 8 or more unique points on the vessel’s surface. The data presented here arethen compared with additional diagnostics consisting of a fast spectral interferometer and an optical backscatter reflectometer to show a comparison between the local and global changes in the vessel strain, both dynamically and statically to further characterize the performance of the localized strain measurement. The results are also compared with electrical resistive strain gauges and finite element analysis simulations. View Full-Text
Keywords: fiber Bragg grating; fiber sensing; high-speed interrogation; dynamic strain fiber Bragg grating; fiber sensing; high-speed interrogation; dynamic strain
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MDPI and ACS Style

Gilbertson, S.; Pickrell, M.; Castano, D.; Salazar, G.; Beery, T.; Stone, S.; Gibson, J. High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings. Sensors 2020, 20, 5935. https://doi.org/10.3390/s20205935

AMA Style

Gilbertson S, Pickrell M, Castano D, Salazar G, Beery T, Stone S, Gibson J. High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings. Sensors. 2020; 20(20):5935. https://doi.org/10.3390/s20205935

Chicago/Turabian Style

Gilbertson, Steve, Mark Pickrell, Dario Castano, Gary Salazar, Tom Beery, Samuel Stone, and Joshem Gibson. 2020. "High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings" Sensors 20, no. 20: 5935. https://doi.org/10.3390/s20205935

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