对于“3000m障碍起跑线”划线方法的研究

Research on the Starting Line Mark Method for the 3000m steeplechases

3 000 m障碍等起跑线在直道上的不分道跑项目,其起跑线不应是一条“等半径的弧线”,现在普遍采用的“等半径划线法”使得处在同一起跑线上不同位置的运动员,在赛跑距离方面存在着明显的误差。误差的存在不仅影响了公平竞争的《田径竞赛规则》精神,而且与现代化的高科技手段在田径竞赛中的运用也不相适应。思考田径运动的文化属性和更高层次的公平竞争精神,应当采用新的无误差划线法。在简述了“等半径划线法”存在着误差并且提供了误差值的基础上,通过推理和计算提出了3种正确的划线方法:即“渐展切线延长线”划线法;“切线延长线量点法”;“坐标定点法”。以期改正现在普遍采用的“等半径划线法”,推广普及新的划线法,消除此类项目由于起跑线划线方法的错误,而导致运动员间赛跑距离的误差。

The start line of non-lane event 3000m steeplechase, which is usually marked as an equi-radius arced line and make the athletes stand at the different place seems to have an obvious error on race distance . The existence of the error not only has negative influence on the spirit of fair play which is required by the Rules of IAAF, but also cannot be coincident with the implementation of the modem high-tech in the competition of track and field. In order to ensure the cultural characteristics of track and field and the high-level fair play spirit, it is necessary to apply the new method of non-error mark. This paper simply analyses the main errors of equi-radius mark method, provides the error value. Based on the deduction and calculation, three correct mark methods were proposed as follows： expending the extending line of tangent; measure extended line of tangent; fixing point with coordinate in order to correct the errors of equi-radius mark method and implement the new mark method, thereby remove the errors in relation to mark methods that leads to athletes＇ race distance.