Acoustic direction finder
First Claim
1. An acoustic signal direction finder comprisinga. at least two dipole electro-acoustic transducer means disposed in quadrature,b. a pair of differential amplifiers, each connected to a respective transducer means for providing a pair of dipole resultant signals related to the acoustic pressure difference of the acoustic signal detected along each of the dipoles,c. integrating means connected to the output of the differential amplifiers,d. means for providing a common sum signal of the signal received by both transducer means in phase,e. a pair of first multiplying means to provide a pair of display deflection signals connected to the integrating means, the individual integrated signals being applied to the respective multiplying means, and further including means for applying the common signal to both of the multiplying means, andf. means for applying the deflection signals to deflection circuitry of a display device.
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Accused Products
Abstract
An acoustic direction finder which identifies and displays bearing of an underwater received signal without the requirement of scanning the ambient space. The output signals of hydrophones at the ends of a pair of orthogonally located dipoles are applied to differential amplifiers to provide orthogonal dipole response characteristics, and an in-phase sum of the signal at the center of the dipoles is obtained. The differential amplifier output signals are integrated and the resultant signals are applied to individual multiplying means with the sum signal whereby a pair of X and Y coordinate deflection signals are obtained, which are applied to a display device.
12 Citations
5 Claims
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1. An acoustic signal direction finder comprising
a. at least two dipole electro-acoustic transducer means disposed in quadrature, b. a pair of differential amplifiers, each connected to a respective transducer means for providing a pair of dipole resultant signals related to the acoustic pressure difference of the acoustic signal detected along each of the dipoles, c. integrating means connected to the output of the differential amplifiers, d. means for providing a common sum signal of the signal received by both transducer means in phase, e. a pair of first multiplying means to provide a pair of display deflection signals connected to the integrating means, the individual integrated signals being applied to the respective multiplying means, and further including means for applying the common signal to both of the multiplying means, and f. means for applying the deflection signals to deflection circuitry of a display device.
Specification