Coriolis acceleration is generally recognized as the key and difficult teaching point in theoretical mechanics .How to figuratively display Coriolis acceleration is always the goal that scholars and college teachers are pursuing .For this problem ,a perfect combination of rotation and linear motion for the ball can be achieved skillfully at the globe in line with the shape of the globe .Accordance to the theory of Coriolis acceleration ,a linear motion device with different speed settings can be set up on a platform , which is rotary with adjustable speeds .The ball moves in straight line on the rotary platform ,which is affected by Coriolis force .At the initial state ,the steel ball installed within the movement device is in e-quilibrium .Then at the working stage ,the spring becomes deformed under the compression by the steel ball because of Coriolis force .The transmission mechanism composed of a pulley ,a wire and a displace-ment compensation wire rod transmits the amount of spring deformation to a display device ,which re-veals the presence and the magnitude of Coriolis acceleration .Different from the existing Coriolis accel-eration test devices ,the proposed device has a novel structure ,which can attract students to understand deeply and grasp the concept of Coriolis acceleration .%科氏加速度是理论力学中公认的教学重点和难点,如何将科氏加速度形象地展示出来一直是学者与高校老师追求的目标.针对这一知识点,结合地球仪的外形,巧妙地实现了小球在科氏地球仪上旋转运动和直线运动的完美结合.根据科氏加速度理论,设计转速可调的旋转平台,在平台上设置能实现不同速度的直线运动装置,小球在旋转平台上作直线运动,从而受到科氏力的作用.初始状态时,安装在运动装置内的钢球处于平衡状态;工作时,由于科氏力的作用,钢球压迫弹簧,弹簧发生变形,利用滑轮、引线和位移补偿丝杆组成的传递机构,将弹簧变形量传递到显示装置,从而显示科氏加速度的存在.与现有科氏加速度验证实验装置所不同的是,此装置结构新颖,能吸引学生深入理解和掌握科氏加速度的概念.
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