Device for releasing falling body prism of absolute gravimeter

Abstract

The invention discloses a device for releasing a falling body prism of an absolute gravimeter, comprising a vacuum cabin, a lower bracket plate, a linear motor, an upper bracket plate, a latch chamber, an electromagnet, a spring, a steel ball, a hanging nail, the falling body prism, a guide rod, a buffer spring, a support vehicle and a perspective window mirror, wherein the electromagnet and the spring are contained in the latch chamber; the steel ball is arranged at the inner bottom of the latch chamber; the bottom of the latch chamber is a concave slope and an opening is arranged in the middle of the bottom of the latch chamber; the spring is clamped between the electromagnet and the steel ball; and the steel ball is in contact with the bottom of the latch chamber. The latch chamber, the spring, the steel ball and the electromagnets are used as clamps so as to play roles of clamping and releasing the falling body prism of the gravimeter; and the device is good in anti-fatigue characteristic, stable and rapid in releasing, durable, free of great interference of mechanical movement in the falling process of the falling body prism and beneficial to the high-precision gravity measurement.

Description

technical field [0001] The invention relates to a measuring device, in particular to a falling prism release device for a free-falling absolute gravimeter. Background technique [0002] The free-fall absolute gravimeter is a device for measuring the free gravitational acceleration of a falling prism in a vacuum state, and the stable release device of the falling prism is an important aspect that affects its measurement accuracy. A utility model patent (Patent No. ZL 200720086464.4) discloses a device for falling mass of an absolute gravimeter. The scheme of this patent is that the falling prism of an absolute gravimeter is clamped or released by a solenoid valve through an elastic chuck. The disadvantage is that : Long-term use, the elastic collet is prone to elastic fatigue, and the clamping force is symmetrically reduced, resulting in that the falling prism cannot be released or the release is not stable. (The so-called "falling body mass" in the patent No. ZL 20072008646...

AI Technical Summary

Problems solved by technology

A utility model patent (Patent No. ZL 200720086464.4) discloses a device for falling mass of an absolute gravimeter. The scheme of this patent is that the falling prism of an absolute gravimeter is clamped or released by a solenoid valve through an elastic chuck. The disadvantage is that : Long-term use, the elastic collet is prone to elastic fatigue, and the clamping force is symmetrically reduced, resulting in the drop prism not being released or not released smoothly

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