Accession Number : AD0165028

Title :   Distance Measuring Device and Method.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Sochard,Irving I.

Report Date : 10 JUL 1973

Pagination or Media Count : 6

Abstract : The patent describes a distance measuring device using a source of acoustic signals of at least a predetermined wavelength which is transmitted to a reference surface and the reflected acoustic signal is received in a detector. The transmitted and received signals are phase-mixed in a mixer to provide a signal responsive to the distance between the distance measuring device and the reflecting surface irrespective of the presence of a non-rigid intervening media, such as foliage, which obstructs the desired reflecting surface. An envelope detector and a threshold device provide a utilization signal when the distance between the distance measuring device and the reflecting surface reaches a predetermined value.

Descriptors :   *Echo ranging, *Patents, *Distance measuring equipment, *Ordnance, Acoustic equipment, Foliage, Penetration

Subject Categories : Acoustic Detection and Detectors
      Aerial Bombs
      Fire Control and Bombing Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE