Phase I Design of a Surface Discharge Low Frequency Acoustic Source

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 27821
Amount: $99,679.00
Phase: Phase I
Program: SBIR
Awards Year: 1995
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
3663 Syracuse Court, San Diego, CA, 92122
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Allen Ramrus
 (619) 453-2640
Business Contact
Phone: () -
Research Institution
Pulsed power technology, which calls upon the rapid discharge of capacitively stored electrical energy, can replace explosives in many applications. Mining metal forming, and echo ranging are examples. This proposal is for the design of a pulsed power sonobuoy suitable for use in a three-element array, to provide, the acoustic output effectively equivalent to that from a 4-pound sound underwater source (SUS) charge. A preliminary design is presented which takes into account the major sub-systems for an A-sized sonobuoy. The acoustic source is an underwater spark discharge which propagates along the surface of a ceramic insulator. The spark is driven by a low inductance pulsar consisting of a capacitor and a gas-pressurized spark-gap. While the capacitor is being charged the spark-gap insulates the capacitor from the ceramic insulator. A rapid movement of a relay contact triggers the spark-gap and initiates the surface discharge along the ceramic insulator. A compact switching-type power supply charges the capacitor in less than 10 s. A 48 V battery storing 1000 Watt-hours (3.5 MJ) provides power to the sonobuoy. A compact control unit equipped with a fiber-optic input permits communication between the submerged sonobuoys and a surface control unit.

* Information listed above is at the time of submission. *

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