Method and apparatus for accurately determing the location of signal transducers in a passive sonar or other transducer array system
First Claim
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1. A method for determining the two-dimensional relative physical locations of a plurality of sensors comprising the steps of:
- receiving first and second reference signals at said sensors from first and second sources, respectively, the locations of said first and second sources being unknown;
calculating delays associated with said first and second reference signals; and
analyzing said delays to determine the two-dimensional relative physical location of said sensors.
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Abstract
An apparatus and method for accurately determining the relative locations of sensors in a passive sonar or like monitoring system utilizes two non-parallel (but not necessarily orthogonal) calibrator signals to calculate the relative positions of sensors in a sensor array. Iteration, using a deformed line array constraint, permits reliable solution of the sensor position equations, even when the relative angle between the calibrator signals is initially unknown.
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Citations
22 Claims
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1. A method for determining the two-dimensional relative physical locations of a plurality of sensors comprising the steps of:
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receiving first and second reference signals at said sensors from first and second sources, respectively, the locations of said first and second sources being unknown; calculating delays associated with said first and second reference signals; and analyzing said delays to determine the two-dimensional relative physical location of said sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining the two-dimensional relative locations of a plurality of sensors comprising the steps of:
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determining distances between each sensor and a first reference source of unknown location; determining distances between each sensor and a second reference source of unknown location; determining bearings between said sensors and said references sources; and determining the two-dimensional relative locations of said sensors. - View Dependent Claims (12, 13)
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14. An apparatus for determining the two-dimensional relative locations of a plurality of sensors comprising:
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a sampler sampling signals received by said sensors, including first and second calibration signals received from sources of unknown location; and a computer adapted to analyze said first and second calibration signals to determine the two-dimensional relative locations of said sensors to an accuracy of better than about one tenth of the wavelength of the highest frequency convened by said sampler. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification