Accession Number : ADD006090

Title :   Surface Elevation Measuring Apparatus.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : McKecknie,John C

Report Date : 15 May 1979

Pagination or Media Count : 21

Abstract : A terrain probe for sensing the elevation of a terrain surface whose profile is being measured and followed. A two-phase induction motor will raise or lower the terrain probe in response to either an increase or decrease in the elevation of the terrain surface. A four arm bridge circuit, which has an arm enclosed within the terrain probe, in combination with a low frequency oscillator, a differential amplifier, and power amplifier generate a sinusoidal drive signal which controls the two-phase induction motor. (Author)

Descriptors :   *Patent applications, *Terrain, *Elevation, *Measuring instruments, Profiles, Probes(Electromagnetic), Positioning devices(Machinery), Induction motors, Potentiometers, Oscillators, Power amplifiers

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE