Releasing device of falling prism of free falling gravimeter

Abstract

The invention discloses a releasing device of a falling prism of a free falling gravimeter, relating to a gravity measuring apparatus. The apparatus is composed of a vacuum cabin (1), a lower bracket plate (2), a linear motor (3), a cantilever (4), an upper bracket plate (5), a recessed spherical surface groove (6), a ball (7), a through hole (8), a hanging rod (9), a falling prism (10), a guide rod (11) and a perspective window mirror (12). An upper surface of the cantilever has the recessed spherical surface groove; the central bottom of the recessed spherical surface groove has the throughhole; the hanging rod traverses the through hole; an upper end of the hanging rod is connected with the ball; the falling prism is hung at a lower end of the hanging rod; the ball can freely move in the recessed spherical surface groove; and the falling prism is slideably connected with the guide rod. The releasing device of the falling prism, employing the recessed spherical surface groove and the ball for releasing in a hanging manner, has good antifatigue characteristic, and is durable in use. Further, the releasing device of the falling prism has good vertical characteristic when the falling prism is released, so as to be beneficial for high precision gravity measuring.

Description

technical field [0001] The invention relates to a gravimetric measuring device, in particular to a free-falling gravimeter falling prism releasing device. Background technique [0002] The free-fall gravimeter (free-fall gravimeter is generally called the classic absolute gravimeter) is the main precision measuring instrument developed internationally to directly measure the acceleration of gravity. Its basic principle is to use the Michelson laser interferometer method at high Under vacuum conditions, measure the time and distance experienced by the object (measuring the falling prism) in the vertical direction, and calculate the gravity value according to Newton's second law. The stable release device of the falling prism is an important aspect affecting its measurement accuracy. A utility model patent (Patent No. ZL 200720086464.4) discloses a falling mass drop device for a free-falling gravimeter. The scheme of the patent is: the falling prism of the free-falling gravim...

AI Technical Summary

Problems solved by technology

A utility model patent (Patent No. ZL 200720086464.4) discloses a falling mass drop device for a free-falling gravimeter. The scheme of the patent is: the falling prism of the free-falling gravimeter is clamped or released by the solenoid valve through the elastic chuck, and its The disadvantages are: 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 smooth. , "falling prism" is easier to understand)

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