Target tracking system for determining bearing of a target

Details Target tracking system for determining bearing of a target Target tracking system for determining bearing of a target

1990-09-14

1992-03-10

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

G01S 380

Patent

active

050954679

ABSTRACT:
A passive acoustic target tracking system includes three microphones arrayed respectively at corners of an equilateral triangle for sensing acoustic energy emitted by a target, such as a heavy vehicle, and generating separate streams of analog signals representative of the acoustic energy sensed at the triangle corners. Hardware of the tracking system receives the separate streams of analog signals from the microphones and conditions and converts the separate streams of analog signals from analog to digital form and outputs the separate streams as digital signals. Software of the tracking system receives the separate streams of digital signals and provides the bearing to the target emitting the sensed acoustic energy. The software includes a minimum residual correlation algorithm and a two-state kalman filter algorithm. The minimum residual correlation algorithm receives the separate streams of digital signals, performs correlations on the separate streams from pairs of the microphones, and produces a raw azimuth signal as a result of the correlation. The two-state kalman filter algorithm receives the raw azimuth signal, performs a two-state kalman filtering of the raw azimuth signal, and produces a smooth azimuth signal constituting the bearing to the target emitting the sensed acoustic energy.

REFERENCES:
patent: 4914642 (1990-04-01), Fraser et al.
Acoustic Tracking of Ground Vehicles, D. J. Shazeer et al., pp. 170-175, The Symposium on Ground Vehicle Signatures, Aug. 19-21, 1986, published by Keweenaw Research Center, Michigan Technological University, Houghton, Mich.

Affiliated with

Also associated with

Rating

Target tracking system for determining bearing of a target does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Target tracking system for determining bearing of a target, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Target tracking system for determining bearing of a target will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2289873