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Proceedings Paper

Study of blast event propagation in different media using a novel ultrafast miniature optical pressure sensor
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Paper Abstract

Traumatic brain injury (TBI, also called intracranial injury) is a high potential threat to our soldiers. A helmet structural health monitoring system can be effectively used to study the effects of ballistic/blast events on the helmet and human skull to prevent soldiers from TBI. However, one of the biggest challenges lies in that the pressure sensor installed inside the helmet system must be fast enough to capture the blast wave during the transient period. In this paper, an ultrafast optical fiber sensor is presented to measure the blast signal. The sensor is based on a Fabry-Pérot (FP) interferometeric principle. An FP cavity is built between the endface of an etched optical fiber tip and the silica thin diaphragm attached on the end of a multimode optical fiber. The sensor is small enough to be installed in different locations of a helmet to measure blast pressure simultaneously. Several groups of tests regarding multi-layer blast events were conducted to evaluate the sensors' performance. The sensors were mounted in different segments of a shock tube side by side with the reference sensors, to measure a rapidly increasing pressure. The segments of the shock tube were filled with different media. The results demonstrated that our sensors' responses agreed well with those from the electrical reference sensors. In addition, the home-made shock tube could provide a good resource to study the propagation of blast event in different media.

Paper Details

Date Published: 3 June 2011
PDF: 6 pages
Proc. SPIE 8028, Fiber Optic Sensors and Applications VIII, 802809 (3 June 2011); doi: 10.1117/12.887225
Show Author Affiliations
Xiaotian Zou, Univ. of Massachusetts Lowell (United States)
Nan Wu, Univ. of Massachusetts Lowell (United States)
Ye Tian, Univ. of Massachusetts Lowell (United States)
Hongtao Zhang, Univ. of Massachusetts Lowell (United States)
Christopher Niezrecki, Univ. of Massachusetts Lowell (United States)
Xingwei Wang, Univ. of Massachusetts Lowell (United States)

Published in SPIE Proceedings Vol. 8028:
Fiber Optic Sensors and Applications VIII
Stephen J. Mihailov; Henry H. Du; Gary Pickrell, Editor(s)

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