【摘要】 高层建筑是城市发展的必然产物,随之而来的是儿童意外坠楼安全事故频频发生,主要原因是儿童独自在家且缺少家长的监护,其中窗台是最易酿成坠楼事故的高危地带。对此,文章设计出一套家用儿童防坠楼监护系统。该系统运用超声波的渡越时间检测法和三球定位算法来实时检测儿童与窗台的位置,并设立两级预警机制。当二次警报触发时,即儿童离窗台太近时,激发执行机构及时封闭窗台。此外,从空气温度、湿度以及两者距离三个角度来分析超声波系统工作的误差并将之解决。更多还原

【Abstract】 High-rise buildings mushroom as cities grow, followed by the frequent children fall accidents. Children stay home lonely and lack of parental care, and they probably fall down from the windowsill. In order to prevent children from falling, we design a home monitoring system which utilizes the ultrasonic time-of-flight method and three-ball intersection positioning algorithm. Our system can detect the position of children in real time and set up two-level early warning mechanism. If the second-level warning is triggered, the system can make an automatic response and close the windowsill. In addition, we analysis and solve some issues of the system from three perspectives, i.e., air temperature, air humidity, and the distance.更多还原