Lorenzo-López José, Juan-Llácer Leandro
Department of Information and Communications Technology, Polytechnic University of Cartagena, 30202 Cartagena, Spain.
Sensors (Basel). 2024 May 23;24(11):3356. doi: 10.3390/s24113356.
In recent years, communication systems, including RFID, have been used in intelligent beehives for beekeeping. RFID systems in the UHF frequency band offer reading distances of tens of centimetres, allowing the localisation and identification of the queen bee inside the hive. With this purpose, this work proposes an analysis of an environment of propagation that consists of a honeycomb frame, where the reader is placed within the frame, and the tag is placed in different positions over it. A honeycomb frame consists of a wooden box containing a honey wax panel, supported by metallic wires. The environment is modelled theoretically using its S-parameters and simulated in CST Studio. An analysis of these results and empirical measurements is performed. The results show that a periodicity in the received power of the tag is found with respect to the distance to the reader when the tag is located in a direction parallel to the wire, where local maximum and minimum values are found. Additionally, when the tag is placed over a wire of the frame, a higher received power is obtained compared to the case where the tag is placed between two wires. Furthermore, it has been observed that the reading range has increased with respect to free space, covering the full frame.
近年来，包括射频识别（RFID）在内的通信系统已被用于智能蜂箱的养蜂中。超高频（UHF）频段的RFID系统提供数十厘米的读取距离，可实现蜂巢内蜂王的定位和识别。为此，本文对一种传播环境进行了分析，该环境由一个蜂窝框架组成，阅读器放置在框架内，标签放置在框架上的不同位置。蜂窝框架由一个装有蜜蜡板的木箱组成，由金属线支撑。利用其S参数对该环境进行理论建模，并在CST Studio中进行模拟。对这些结果和实证测量进行了分析。结果表明，当标签位于与金属线平行的方向时，标签接收功率相对于到阅读器的距离呈现周期性，出现局部最大值和最小值。此外，当标签放置在框架的金属线上时，与放置在两根金属线之间的情况相比，可获得更高的接收功率。此外，还观察到与自由空间相比，读取范围有所增加，覆盖了整个框架。
