Composite twistless compound pendulus rod

Abstract

The invention relates to a compound swing bar without twist. It takes the structure of three-lay composite sandwich, and the aperture of middle layer is less than that of outer, which thickness is 0.2~0.3 mm in control. So that the line contact between hole on the rocker and top edge of the prism is changed into the point contact on the midpoint of hole to make the rocker hang in a vertical state, eliminate twisting, save time and reduce measure error and cost.

Description

1. Technical field [0001] The invention relates to a compound pendulum in a physical experiment instrument, in particular to a compound pendulum pendulum bar capable of eliminating twisting. 2. Background technology [0002] Presently known compound pendulum is made of two parts: the one, fork, the 2nd, support, and wherein the profile of fork is a rectangular metal plate, and dozens of circular through holes are distributed along the longitudinal center line on the plate. In the experiment, the hole of the swing rod is set on a triangular prism arranged horizontally above the bracket, and the top of the hole of the swing rod is combined with the edge above the triangular prism. When the lower end of the swing rod is pulled away from the equilibrium position and released, the swing rod begins to swing. According to the experimental principle, this swing must be a smooth swing in a vertical plane, so that the error of the acceleration of gravity measured by this will tend to...

AI Technical Summary

Problems solved by technology

The important thing is that this contact point is not at the center of the hole top of the swing rod, but at a certain end of the hole top. In this case, the suspended swing rod cannot be in a vertical state, so once it swings, it will Significant twisting inevitably occurs, resulting in large measurement errors

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