Invention Grant
US09239220B2 Determination of near surface geophyscial properties by impulsive displacement events 有权
通过脉冲位移事件确定近地表地球物理性质

Determination of near surface geophyscial properties by impulsive displacement events
Abstract:
The invention is an improved technique for measuring near surface attributes of the ground while conducting a seismic survey. The improved technique is enabled by an electric vibe using a number of linear electric motors that direct a rod or piston to contact the ground in a recurring fashion. By applying constant force on the rods of the linear electric motors against the ground, the penetration into the ground may be measured for both rate and overall deformation. This information provides an accurate indication of viscosity and stiffness. In addition shear velocity and compression velocity may be measured and in some conditions, even the type of prominent shear wave may be identified for the area.
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