Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals
Patent
1959-11-25
1980-05-13
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
By combining or comparing signals
367126, 114 23, G01S 380
Patent
active
042031630
ABSTRACT:
6. In a target-detection and location system adaptable for the navigation an acoustic torpedo, having a first and a second alternating voltage signal emanating from the acoustic detection portion of said torpedo, the combination comprising: a phase-shifter adapted to delay the phase of said incoming first voltage signal 90 degrees; a phase-inverter driven by said phase-shifter the output of said phase-inverter being two voltages, one in-phase with and the other out-of-phase with the signal from said phase-shifter; a potentiometer having a variable arm electrically connected therewith, said potentiometer being connected across the output of said phase-inverter; means for combining the voltage at said variable arm with said second voltage signal; a first and a second limiting amplifier adapted to maintain a constant power output, said second voltage signal and the voltage present at said variable arm being applied to said second limiting amplifier, and said in-phase voltage from said phase-inverter being applied to said first limiting amplifier; a phase-sensitive detector connected to said first and second limiting amplifiers adapted to compare signals of said limiting amplifiers, the polarity of the output signal of said phase-sensitive detector being dependent on the phase-relationship of the output signal of said limiting amplifiers; and a servo motor system operationally associated with said potentiometer arm, the direction of rotation of said motor being controlled by the output of said phase-sensitive detector whereby said potentiometer arm is so oriented as to result in a zero signal input to said limiting amplifier, the orientation of said potentiometer arm being respectively proportional to the magnitude of said second voltage and indicative of its polarity.
REFERENCES:
patent: 2948970 (1960-08-01), Carruthers
Farley Richard A.
Hansen Henry
Sciascia R. S.
The United States of America as represented by the Secretary of
LandOfFree
Target-detection and location system 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-detection and location system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Target-detection and location system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-933125