Global to push GA events into
skip to main content

Title: Fiber optic sensor employing successively destroyed coupled points or reflectors for detecting shock wave speed and damage location

A shock velocity and damage location sensor providing a means of measuring shock speed and damage location is disclosed. The sensor consists of a long series of time-of-arrival ``points`` constructed with fiber optics. The fiber optic sensor apparatus measures shock velocity as the fiber sensor is progressively crushed as a shock wave proceeds in a direction along the fiber. The light received by a receiving means changes as time-of-arrival points are destroyed as the sensor is disturbed by the shock. The sensor may comprise a transmitting fiber bent into a series of loops and fused to a receiving fiber at various places, time-of-arrival points, along the receiving fibers length. At the ``points`` of contact, where a portion of the light leaves the transmitting fiber and enters the receiving fiber, the loops would be required to allow the light to travel backwards through the receiving fiber toward a receiving means. The sensor may also comprise a single optical fiber wherein the time-of-arrival points are comprised of reflection planes distributed along the fibers length. In this configuration, as the shock front proceeds along the fiber it destroys one reflector after another. The output received by a receiving means from this sensor maymore » be a series of downward steps produced as the shock wave destroys one time-of-arrival point after another, or a nonsequential pattern of steps in the event time-of-arrival points are destroyed at any point along the sensor. 6 figs.« less
Inventors:
Issue Date:
OSTI Identifier:
100985
Assignee:
Dept. of Energy, Washington, DC (United States) SNL; SCA: 440600; PA: EDB-95:131608; SN: 95001445701
Patent Number(s):
US 5,446,278/A/
Application Number:
PAN: 8-172,304
Contract Number:
AC04-76DP00789
Resource Relation:
Other Information: PBD: 29 Aug 1995
Research Org:
AT&T Corporation
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; SHOCK WAVES; VELOCITY; MEASURING INSTRUMENTS; DESIGN; FIBER OPTICS; OPTICAL EQUIPMENT; MEASURING METHODS; VISIBLE RADIATION

Similar records in DOepatents and OSTI.GOV collections: