Method and apparatus for accurately determing the location of signal transducers in a passive sonar or other transducer array system
AssigneeDiagnostic/Retrieval Systems, Inc.
InventorJack R. Williams
Life of this patent
Estimating the term…
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.
Claims22
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.
A method of determining the two-dimensional relative locations of a plurality of sensors comprising the steps of:
- 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.
An apparatus for determining the two-dimensional relative locations of a plurality of sensors comprising:
- 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.
Dependencies are inferred from the claim text.