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研究无线信号在生猪养殖环境中的传播特性,可以对无线传感器网络的路径损耗进行预测,从而为网络的部署奠定基础。研究采用ZigBee无线传感网络技术,通过在生猪养殖场中实际测试了有障碍物情况下,无线信号的丢包率和接收信号的功率强度,进而得出路径损耗值,以及障碍物的衰减因子,并进行了回归分析。研究表明,墙体衰减因子随墙壁数量增加而增大,植株衰减因子随天线架设高度升高而减小。最终模型的路径损耗参数为2.02,路径损耗的基础损耗为63.602,以混凝土墙为障碍物时,其衰减因子大小为2.64。将障碍物的衰减因子综合添加在经验模型中,可以有效的预测路径损耗值。
Studying the propagation characteristics of wireless signals in pig breeding environment can predict the path loss of wireless sensor networks and lay the foundation for the network deployment. The research uses ZigBee wireless sensor network technology, through the actual test in an hog farm with obstacles, the packet loss rate of the wireless signal and the received signal power intensity, and then get the path loss value, as well as the obstacle attenuation factor , And conducted regression analysis. The research shows that the wall attenuation factor increases with the increase of wall number, and the plant attenuation factor decreases with the height of the antenna. The final model has a path loss parameter of 2.02 and a base loss of path loss of 63.602. When the concrete wall is an obstacle, its attenuation factor is 2.64. Integrating the obstacle attenuation factor into the empirical model can effectively predict the path loss value.