Accession Number : ADD010846

Title :   Triaxial Deflection Meter.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Lytle,J D ; Combs,J M

Report Date : 05 Sep 1978

Pagination or Media Count : 8

Abstract : An apparatus for conducting measurements of displacement, deflection, tilting, and/or rotation of structures such as floodwalls, retaining walls, dam piers, buildings, embankments and the like is disclosed. The apparatus of this invention has the capability of simultaneously making measurements in two planes, parallel and perpendicular, with respect to an axis or other predetermined reference. Further, the apparatus of this invention includes means for determining the azimuthal bearing of the apparatus relative to the axis of other predetermined reference when the aforementioned measurements are conducted. The apparatus of this invention includes a measuring unit having a housing that houses first and second servo-accelerometers; first, second and third amplifiers; and a rotational variable differential transformer. The amplifiers are electrically coupled to a meter by means of a cable having electrical conductors. Measurements can be obtained with the measuring unit a fixed mount orientation or in an orientation where the measuring unit is moved vertically through a tube or casing.

Descriptors :   *Patents, *Deflection, Structures, Tilt, Measuring instruments, Accelerometers, Servomechanisms

Subject Categories : Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE