Passive blast pressure sensor

King, Michael J.; Sanchez, Roberto J.; Moss, William C.

Title: Passive blast pressure sensor

Patent · Tue Mar 19 00:00:00 EDT 2013

OSTI ID:1083040

King, Michael J.; Sanchez, Roberto J.; Moss, William C.

A passive blast pressure sensor for detecting blast overpressures of at least a predetermined minimum threshold pressure. The blast pressure sensor includes a piston-cylinder arrangement with one end of the piston having a detection surface exposed to a blast event monitored medium through one end of the cylinder and the other end of the piston having a striker surface positioned to impact a contact stress sensitive film that is positioned against a strike surface of a rigid body, such as a backing plate. The contact stress sensitive film is of a type which changes color in response to at least a predetermined minimum contact stress which is defined as a product of the predetermined minimum threshold pressure and an amplification factor of the piston. In this manner, a color change in the film arising from impact of the piston accelerated by a blast event provides visual indication that a blast overpressure encountered from the blast event was not less than the predetermined minimum threshold pressure.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC52-07NA27344

Assignee:: Lawrence Livermore National Security, LLC (Livermore, CA)

Patent Number(s):: 8,397,551

Application Number:: 12/770,983

OSTI ID:: 1083040

Country of Publication:: United States

Language:: English

References (28)

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