基于人体体征的作业人员安全预警系统

Safety early warning system for live working considering body signs

为避免带电作业人员在封闭的屏蔽服中因热应力而引发的事故,基于热应力理论,研发一套基于人体体征的作业人员安全预警系统。首先,分析人体状态参数,并将其设置为预警系统的阈值;然后,提出安全预警方法,并从电源、微处理器、无线上网(Wi Fi)通信、数据采集、报警等5个模块介绍安全预警系统的设计思路;最后,利用样机进行Wi Fi通信功能测试、心率检测功能测试以及电磁兼容试验。结果表明:该系统续航能力大于8 h,Wi Fi通信距离大于15 m,心率误差小于3%,可在300 kV高压环境下正常工作。

In order to avoid the accidents of working personnel caused by thermal stress in enclosed structure of shielding suit for live operation,a safety early warning system based on body signs was developed based on the thermal stress theory.Firstly,the state parameters of human body were analyzed and set as the threshold of the early warning system.Secondly,the safety warning method was proposed and the design idea was introduced from five module including power supply,microprocessor,Wireless Fidelity(WiFi)communication,data acquisition and alarm.Finally,the WiFi communication function test,the heart rate detecting function test and the high-voltage electric field experiment were carried out by using the sample machine.The results show that the proposed system's endurance capacity is greater than 8 h,that WiFi communication distance is greater than 15 m,that the heart rate error is less than 3%,and that it can work normally under 300 kV high pressure environment.