Accession Number : ADA299215

Title :   A Method of Identifying Supersonic Projectiles Using Acoustic Signatures.

Descriptive Note : Rept. for Apr 92-Aug 93,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Loucks, Richard B. ; Davis, Bradford S. ; Moss, Linda ; Pham, Tien ; Fong, Manfai

PDF Url : ADA299215

Report Date : SEP 1995

Pagination or Media Count : 223

Abstract : There was a need to investigate the feasibility of attaching a device to the existing Remote Equipment Target System (RETS) such that RETS would be able to identify the type of projectile that struck the target. A concept was developed to identify projectiles acoustically by measuring some characteristics of N-Wave produced from the projectile's sonic boom. High fidelity microphones were positioned to provide N-Wave profiles. The distance between the sonic boom's source and the microphone was the most important parameter. An array of six low-fidelity microphones was used to locate the projectile location. By utilizing the sonic boom arrival times and knowledge of the spatial locations of the low-fidelity microphones, the location of the projectile relative to the high-fidelity microphones was determined. The concept development was broken into three phases - feasibility, data collection, and finally validation and verification of the concept's functionality. A prototype unit called a Round Discrimination System (RDS) was fabricated and field tested in the validation verification phase. The RDS unit was transported to the 7th ATC in Germany for a demonstration. This report provides details of each phase of the development program and the results of the onsite demo in Germany.

Descriptors :   *TARGET RECOGNITION, *ACOUSTIC SIGNATURES, SPATIAL DISTRIBUTION, POSITION(LOCATION), VERIFICATION, VALIDATION, PROJECTILES, PROTOTYPES, DATA ACQUISITION, SUPERSONIC CHARACTERISTICS, MICROPHONES, REMOTE SYSTEMS, SONIC BOOM.

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE