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滑坡等灾害发生后,如果可穿戴的无线呼救设备,在地面无线信号的激励下,可将被掩埋人员的身份等信息发送出来,进行定位与人数统计,有利于提高救援效率减少损失。根据天线辐射理论公式估算,开放的433MHz频率能够用于可穿戴无线呼救通信。据此选用Si4463和STM32F103系列芯片设计了无线搜呼救设备的模型,并设计了无线收发程序和防碰撞程序软件。相似性模拟实验表明,微型、低功率433MHz频段发收设备,岩土到地面的单程有效通信距离约为8.5m。
Landslide and other disasters, if wearable wireless distress devices, wireless signal ground stimulation, the identity of buried personnel can be sent out information for positioning and the number of people, help to improve the efficiency of rescue and reduce losses. According to the theoretical formula of antenna radiation, the open 433MHz frequency can be used for wearable wireless call-for-help communication. Based on this, the model of wireless search and rescue equipment was designed using Si4463 and STM32F103 chips, and the software of wireless transceiver and anti-collision software was designed. Similarity simulation experiments show that the miniature, low power 433MHz band transceiver equipment, geotechnical to ground one-way effective communication distance of about 8.5m.