【摘要】 本系统是为行人在雨天环境下提供一种非接触式的窨井探测工具。本设计通过超声波换能器采集积水深度,并由单片机对超声波换能器回波信息进行分析,计算出积水深度,当其超过预设阈值时,即判断存在窨井盖错位或遗失,而控制发出声光报警,以达到帮助行人暗夜或雨天避险的目的。通过模拟雨天和无水环境下的对比实验,结果表明,本系统测量准确,探测误差在5cm以内,最深探测距离约5.6m,能够稳定地实现故障窨井的探测和预警功能。更多还原

【Abstract】 The system will play a contactless implement for manholes detector in the rainfall.In the design the rainfall depth will be calculated by SCM from ultrasonic transducer echo signals,so that it will keep an alarm to the people avoid those risks in the darkness or rainfall that means a default or loss of manholes cover while the detector value is more than the preset value.The simulated experimentation results showed that the system has about 5.6 mdeepest distance and less 5cm error,so can be used steady as the warning detector for the city manhole.更多还原