Accession Number : ADD014149

Title :   Acoustic Pinger for Use in High Speed Water Entry Test Bodies.

Descriptive Note : Patent, Filed 29 Feb 88, patented 9 May 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hunsaker, Glen L

Report Date : 09 May 1989

Pagination or Media Count : 5

Abstract : Tracking and location of a high speed water reentry vehicle is assured by the inclusion of an acoustic source. An acoustic generator in the form of a piezoelectric transducer is potted in polyurethane and fills a volume aft of a disc-shaped wall in the reentry vehicle. The potting compound couples the acoustic generator to the metal skin to enable acoustic transmission from the vehicle to the tracking range. Optionally, a layer of material is interposed between the potting compound and the vehicle's metal skin to aid in acoustically coupling the generator's output to the metal skin. No structural modifications of the entry vehicle are required yet the pinger is capable of sustaining re-entry shock. Patents. (jhd)

Descriptors :   *PATENTS, *PINGERS, *REENTRY VEHICLES, *ACOUSTIC TRACKING, *WATER ENTRY, ACOUSTIC EQUIPMENT, COUPLING(INTERACTION), LAYERS, MATERIALS, MODIFICATION, NOISE(SOUND), OUTPUT, PIEZOELECTRIC TRANSDUCERS, POLYURETHANE RESINS, POTTING COMPOUNDS, SHOCK, SOUND GENERATORS, SOUND TRANSMISSION, SOURCES, STRUCTURAL PROPERTIES, SKIN(STRUCTURAL)

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE