Accession Number : ADD012205

Title :   Shock-Hardened Hydrophone.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Tims,Allan C ; Henriquez,Theodore A

Report Date : 01 Oct 1985

Pagination or Media Count : 6

Abstract : A shock-hardened hydrophone comprising a sensor electrically connected to a low output-impedance preamplifier by a circuitboard. The sensor includes two metal cups, each cup with a piezoelectric ceramic disk positioned therein for generating a potential difference between the first and second surfaces of the disk. The cups are bolted together with the circuitboard positioned between the disks. The second surfaces of the disk are in pressure contact with a first electrode disposed on both sides of the circuitboard. A wire connects one of the metal cups to a second electrode disposed on either side fo the circuitboard thereby completing the electrical connection of the disks to the electrodes on the circuitboard. The preamplifier is mounted on the circuitboard where the input to the preamplifier is the voltage difference between the first and second electrodes. (Author)

Descriptors :   *PATENTS, *HYDROPHONES, ELECTRODES, DISKS, PREAMPLIFIERS, CERAMIC MATERIALS, PIEZOELECTRIC MATERIALS, HARDENING, LOW LEVEL, OUTPUT, IMPEDANCE, METALS, INPUT, SURFACES

Subject Categories : Electrical and Electronic Equipment
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE