说明：  基于UML的汽车安全带提示控制系统建模. 设计要求： 若未系安全带，亮红灯提示； 车辆行驶速度小于10km/h，红灯不闪烁，蜂鸣器不发声；大于10km/h,红灯闪烁，蜂鸣器发声，但是行驶时间超过5分钟，则蜂鸣器停止发声，红灯亮，不闪烁。 倒车时，红灯灭 系上安全带，红灯灭
(UML-based control system modeling of vehicle seat belt tips. Design requirements: If you do not wear seat belts, red tips vehicle speed is less than 10km/h, the red light does not flash, the buzzer does not sound than 10km/h, red light flashes, the buzzer sound, but more than 5 minutes driving time, the buzzer sound stops, the red light, not blinking. Reversing turned off, wear seat belts, red light off)