U.S. Army Communications-Electronics Command Acquisition Center -- Washington Operations Office, 2461 Eisenhower Ave., Alexandria, VA 22331-0700

A -- AN ACOUSTIC/LASER DOPPLER VIBROMETER TECHNOLOGY FOR LAND MINE DETECTION DUE 090999 POC Simone Johnson, 703-325-2602 WEB: Click here to connect to the interagency business opportuninty, acbop.monmouth.army.mil. E-MAIL: Click here to contact the contract specialist., sjohns@hoffman-issaa2.army.mil. The US Army CECOM Acquisition Center-Washington intends to negotiate on a sole source basis with the University of Mississippi, National Center for Physical Acoustics in University, MS, a contract for an Acoustic/Laser Doppler Vibrometer Mine Detection Technology Demonstration. This requirement is for a 36-month contract effort and is under the technical direction of the US Army CECOM Night Vision Electronic Sensors Directorate. This effort transitions the current proof-of-concept brassboard configuration to a prototype demonstrator through a continuation of developing and testing efforts. Specific areas of development and test include using an incoherent optical speckle interferometric technique to accurately measure surface vibrations and speed up the scan rates; integrating the breadboard system onto a vehicular platform; and evaluating the acoustic/speckle interferometer concept for vehicle/soldier mounted both as a scanning sensor and a confirmation sensor. The acoustic technology uses an airborneacoustic source to excite vibrations in the vicinity of buried land mines, which is then measured using a co-mounted laser Doppler vibrometer. The acoustic source preferentially excite the Biot Type II or slow wave at an intensity level sufficient to penetrate several tens of centimeters at 100Hz. The Doppler vibrometer measures the surface particle velocity of the induced ground vibrations in the insonified region. Particle velocity maps or images of the ground surface velocity are used to determine shapes and sizes of mines. Relationships between soil characteristics and the measured signal are defined in sufficient detail to allow predictions of system performance to all conditions. The vibrometer must be acoustically isolated from the airborne sound field and the speaker platform. The sound source and laser are mounted on a stand alone mobile platform. See Numbered Note 22. Posted 07/26/99 (W-SN359000). (0207)

Loren Data Corp. http://www.ld.com (SYN# 0002 19990728\A-0002.SOL)