Obliquity rod suspension type gravity gradient former

Abstract

The present invention discloses an obliquity rod suspension type gravity gradient former. The former comprises a probe, an upper quality inspection, an upper obliquity rod, a cross bar, a lower obliquity rod, a reed, a rotary table, a capacitive displacement sensing module, an electrostatic feedback module and an analog-digital conversion circuit. The reed is in rigid connection with the middle portion of the cross bar, one end of the upper obliquity rod is in rigid connection with one end of the cross bar, one end of the lower obliquity rod is in rigid connection with the other end of the cross bar; the other end of the upper obliquity rod, is connected with the upper quality inspection; the other end of the lower obliquity rod, is connected with the upper quality inspection in the probe; and the upper obliquity rod and the lower obliquity rod are arranged in parallel, and the control end of the probe is connected with the output end of the electrostatic feedback module. The obliquity rod suspension type gravity gradient former only needs an apparatus to complete the measurement of the gravity gradient changing, the entirety of obliquity rod is a central symmetry structure and is insensitive for the ground vibration, the two sides, opposite to the polar plate, of the upper obliquity rod, the lower obliquity rod and the upper quality inspection, the two sides corresponding to the upper quality inspection, the left polar plate and the right polar plate are mutually parallel so as to improve the machinery sensitivity; and through changing of the angle of the obliquity rods and the cross bar the obliquity rod suspension type gravity gradient former can measure the diagonal tensor and the full tensor of the gravity gradient.

Description

technical field [0001] The invention belongs to the field of gravity gradient measuring instruments, and more specifically relates to a gravity gradient instrument suspended on an inclined rod. Background technique [0002] Gravity gradient measurement is of great significance to earth science and space science, and it is also one of the effective means of resource exploration. It has important application value for basic geological survey and research, oil and gas deposits and other resource exploration. Gravity gradiometers are divided into torsion balance-based gravity gradiometers and differential accelerometer-based gravity gradiometers. The former has a torsion balance gravity gradiometer, and the latter has a rotating accelerometer gravity gradiometer, a superconducting gravity gradiometer, an electrostatic gravity gradiometer, and an atomic interference gravity gradiometer. [0003] The basic principle of the torsion balance gravity gradiometer is to use a suspensio...

AI Technical Summary

Problems solved by technology

However, such instruments are generally expensive, difficult to manufacture, and complex in structure.

For example, superconducting gravity gradiometers need to work at low temperatures, which puts forward high requirements for advanced low-temperature equipment; atomic interference gravity gradiometers are bulky, which is not conducive to field measurements

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