TOWED ARRAY STRAIN-SENSING NOISE CANCELLER
Assignee
US Government
Filed as: UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
Filed
Sep 9, 1981
Granted
Jul 2, 1996
Location
CLINTON MD US
Abstract
Method and apparatus are disclosed for reducing breathing-wave induced no in a liquid-filled elongate hose housing a hydrophone array. The arrangement involves sensing radial strain induced in the hose wall by the breathing waves (created as the hose is drawn longitudinally through water) and subtracting a multiple of the sensed value thereof from the array hydrophone output. Arrangements for measuring the breathing-wave-induced wall strains include (1) relative phase shifts in light passing through the sensing arm of an optical fiber interferometer, and (2) signal currents generated from piezolectric polymer both of which are disposed inside the hose wall surrounding a hydrophone.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 17, 1982
Rescinded
Oct 27, 1995
Duration
13 years, 7 months
Inventor
- 1ROBERT J. HANSEN
Record Details
- Patent number
- US 5532979
- Application
- 06304417
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
Browse by Assignee
US GovernmentMore from this assignee
ENERGETIC FLUORONITRO PREPOLYMER
US Government
PULSE SAMPLED OPTICAL FIBER HYDROPHONE ARRAY (U)
US Government
ELASTOMERIC IMPULSE ENERGY STORAGE AND TRANSFER SYSTEM
US Government
MONITORING SYSTEM AND METHOD FOR NUCLEAR WEAPONS EFFECTS DETECTION AND DAMAGE ASSESSMENT
US Government
ANALOG VIDEO PROCESSOR
US Government
SIGNAL PROCESSOR
US Government
Related by domain
AIRBORNE RADAR JAMMING SYSTEM
BOEING, COMPANY, THE
METHOD AND APPARATUS FOR THE DETECTION OF OBJECTS USING ELECTROMAGNETIC WAVE ATTENUATION PATTERNS
JG TECHNOLOGIES LLC
DUAL INFRARED BAND OBJECTIVE LENS
OPTICAL NIGHT VISION DEVICE WITH STANDARD LIGHT INTENSIFIER
THOMSON-CSF SEXTANT
MULTIPLE INFRARED MISSILE JAMMER
LOCKHEED SANDERS INC, A DELAWARE CORPORATION
BANDGAP RADIATION DETECTOR