摘要
为了揭示无线传感器信号在下水道内的传播规律,采用混合方法,把电磁波在下水道内的传播空间分为了近场区和远场区两个不同的区域,推导出了电磁波传播的信道模型。结果表明:下水道内的介电常数越大,衰减率越小;频率越高,电磁波衰减越小;半径越大,越有利于电磁波的传播。研究结果初步解决了信号在下水道内的传播规律,有助于污水流量计的进一步投入使用。
In order to study the propagation property of sensor signal in sewer,the space in sewer is divided into near field area and distant field area using a combined approach.Then a channel model is derived.The study results show that the greater the permittivity in sewer,the smaller the attenuation rate;the attenuation rate will become smaller when frequency increases;and the increase of sewer radii enhances the electromagnetic wave propagation.The findings of signal propagation in sewer will help the wide application of flow meter.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2010年第3期439-442,共4页
Journal of Liaoning Technical University (Natural Science)
基金
山西省自然科学基金资助项目(2009011059-15)
教育部博士点基金资助项目(20091402120006)
关键词
下水道
混合模型
电磁波
衰减率
sewer
hybrid model
electromagnetic wave
attenuation rate
