Double-layer vibration isolation device

Abstract

The invention discloses a double-layer vibration isolation device. The double-layer vibration isolation device comprises a first-stage static platform and a first-stage movable platform; the first-stage static platform is a base of the vibration isolation device, an isolation pad is arranged between the first-stage static platform and the first-stage movable platform, and the isolation pad, the first-stage static platform and the first-stage movable platform are connected through bolts; a second-stage movable platform is a mounting platform of the vibration isolation device and used for allowing equipment to be subjected to vibration isolation, namely the sea-air gravity sensor, to be arranged, a mounting connecting opening is formed in the upper portion of the second-stage movable platform, and a circular groove structure in the middle part of the second-stage movable platform is a weight reduction groove; a second-stage isolation pad is arranged between a second-stage static platformand the second-stage movable platform, the second-stage isolation pad, the second-stage static platform and the second-stage movable platform are connected through bolts, and the vibration isolationeffect is achieved; and meanwhile, the bolts are isolated from the second-stage static platform through bolt isolation pads so that elastic connection can be guaranteed, and the first-stage movable platform and the second-stage static platform are rigidly connected through stand columns. The double-layer vibration isolation device has the advantages that the vibration isolation device is applied to the gravity sensor, so that the attenuation efficiency of an interference vibration magnitude root-mean-square value input to the gravity sensor is improved to 96.2% from 50% or so of a common shockabsorber.

Description

technical field [0001] The invention belongs to a vibration isolation device for a gravity sensor, in particular to a double-layer vibration isolation device with a low cut-off frequency for a sea-air gravity sensor. Background technique [0002] The sea-air gravity sensor is a dynamic measurement. During the measurement process, the gravity acceleration measured by the sea-air gravity sensor includes the interference acceleration caused by the disturbance of the measurement carrier. Due to the influence of the interference acceleration, the gravity acceleration measured by the gravity sensor Therefore, a vibration isolation device is needed to weaken the influence of interference acceleration on the gravity sensor, so that the gravity sensor can meet the measurement accuracy requirements in a dynamic environment. The double-layer vibration isolation device provided by the invention can meet this requirement. Contents of the invention [0003] The purpose of the present i...

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Problems solved by technology

[0002] The sea-air gravity sensor is a dynamic measurement. During the measurement process, the gravity acceleration measured by the sea-air gravity sensor includes the interference acceleration caused by the disturbance of the measurement carrier. Due to the influence of the interference acceleration, the gravity acceleration measured by the gravity sensor Therefore, a vibration isolation device is needed to weaken the influence of interference acceleration on the gravity sensor, so that the gravity sensor can meet the measurement accuracy requirements in a dynamic environment

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