SEISMIC VIBRATOR CONTROLLED BY DIRECTLY DETECTING BASE PLATE MOTION

摘要

A seismic vibrator has a base platewith at least four isolators isolating a frame from thebase plate. Each of these isolators is offset from theplate's footprint on shelves to free up area on theplate's top surface. An accelerometer disposeddirectly on the base plate detects the acceleration impartedto the plate. To reduce flexing and bending, the platehas an increased stiffness and approximately the samemass of a plate for a comparably rated vibrator. Theaccelerometer disposes at a particular location of theplate that experiences transition between longitudinalflexing along the plate's length. This transitionlocation better represents the actual acceleration of theplate during vibration and avoids overly increasedand decreased acceleration readings that would beob-tained from other locations on the plate.