一种防失足讲台探测器的设计

Design of the platform edge detector to prevent slipping down

为解决师生上下讲台时容易发生摔倒或讲课时失足崴脚等问题,设计了一种基于超声波的讲台探测器。该探测器由主控板和探测子板组成。每个探测子板具有对应的探测区域,探测区域靠近讲台的边沿放置,用来向对应的探测区域发射探测信号,以获取探测区域内人体距离的变化信息。主控板与每个探测子板通过RS485总线联网,主控板根据收到的距离信息判断人体是否到达讲台边沿,给予及时提醒。测试表明该设计能够适时对讲台边沿的人体活动进行探测,预防失足事故发生。

When teachers and students walk up and down to the platform,it is easy to fall down. To prevent such accidents,a kind of platform detector is designed on the base of ultrasonic wave sensor,which includes the main control boards and detector boards.Each detector subboard deals with the corresponding detection area near the platform edge. It can emit ultrasonic waves constantly to obtain the varying distance information when the human body walks up to the platform edge. The main control board is connected to each detector subboard via the bus of RS485. The main control board is used to determine whether a human body reaches the edge of the platform according to the distance information,and send out a warning. The test shows that the design can detect the human activity of the platform edge in time so as to avoid the occurrence of the accident.