Accession Number : ADD018643

Title :   Isolated Sensing Device Having an Isolation Housing

Descriptive Note : Patent Applications, Filed 1 Oct 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Dubois, Neil J

PDF Url : ADD018643

Report Date : 01 Oct 1997

Pagination or Media Count : 10

Abstract : An isolation housing is used to isolate a sensor, such as a hydrophone, from pressure fluctuations or other adverse conditions caused by fluid flow in a fluid environment. The isolation housing includes a cap portion that receives the sensor and fluid from the fluid environment. The isolation housing further includes a mounting portion that mounts the housing to a structure disposed in the fluid environment. When the sensor is a hydrophone, the cap portion is made from a material having an acoustic impedance that matches the surrounding fluid environment. The cap portion further includes one or more apertures allowing gas bubbles to escape from within the cap portion. The isolation housing further includes a retaining device, such as a resilient member, that retains the sensor centrally within the cap portion and isolates the sensor from structural vibrations or other adverse effects caused by the structure.

Descriptors :   *PATENT APPLICATIONS, *HYDROPHONES, VIBRATION, STRUCTURAL PROPERTIES, ISOLATION, PRESSURE MEASUREMENT, ADVERSE CONDITIONS, UNDERWATER ACOUSTICS, FLUID FLOW, ACOUSTIC IMPEDANCE

Subject Categories : Machinery and Tools
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE