时尚的变速自行车(图1)备受青少年的青睐,然而手动变速繁琐,难以有效控制。为此,我们研制了自行车变速的智能化控制装置。该装置由控制终端和变速箱两大部分构成,分别安装在前车把和后座处。控制终端装有一个液晶屏和两个不同颜色按钮(图2),告知骑行中的速度、坡面倾角、当 Fashionable speed bikes (Figure 1) are popular among young people, however, manual speed changes are cumbersome and difficult to control effectively. To this end, we developed a smart bicycle speed control device. The device consists of two parts of the control terminal and gearbox, respectively, installed in the front handlebar and the rear seat. Control terminal equipped with a LCD screen and two different color buttons (Figure 2), informing the speed of the ride, slope inclination, when