Place calibration of sonar receive array
AssigneeL-3 Communications Corporation
InventorColin W. Skinner
Life of this patent
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Abstract
The invention pertains to sonar receive arrays. More particularly, the invention pertains to a process for calibrating the amplitude, position and phase angle of an array of underwater receive hydrophones with respect to one another. The process requires projecting an acoustic test signal at a known frequency from a towed underwater acoustic projector toward an array of towed, underwater, interconnected, receive hydrophones; detecting and determining the response of the receive hydrophones to said test signal by signal processing means; and calibrating at least one parameter for the operation of the receive hydrophones resulting from the response. Calibrated parameters include the amplitude, position and phase angle of the receive hydrophones relative to one another.
Claims21
A process for calibrating an array of underwater receive hydrophones which comprises:
- (a) projecting an acoustic test signal at a known frequency from a towed underwater acoustic projector simultaneously towards a plurality of towed, underwater, interconnected, receive hydrophones arranged in an array, which projector is at a fixed position with respect to one end of the array;
- (b) detecting and determining the response of the plurality of receive hydrophones to said test signal by signal processing means;
- (c) calibrating at least one parameter for the operation of the plurality of receive hydrophones resulting from the response.
A system for calibrating an array of underwater receive hydrophones which comprises:
- (a) means for projecting an acoustic test signal at a known frequency from a towed underwater acoustic projector simultaneously towards a plurality of towed, underwater, interconnected, receive hydrophones arranged in an array which projector is at a fixed position with respect to one end of the array;
- (b) signal processing means for detecting and determining the response of the plurality of receive hydrophones to said test signal;
- (c) means for calibrating, at least one parameter for the operation of the plurality of receive hydrophones resulting from the response.
Dependencies are inferred from the claim text.