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声表面波射频识别与温度传感一体化系统
资料介绍
在物联网的多应用场合中需要同时实现识别和传感功能,这是声表面波技术的优势之一。采用脉冲时延结合相位编码方案设计了编码容量近三百万的声表面波标签,分析了标签的一体化识别与测温原理。采用射频直接欠采样数字正交解调方案设计了相应的阅读器,以提高识别和测温的准确性与稳定性。在柔性电路板上设计制作了小型化折叠偶极子天线,从而拓展了应用领域。实际测试结果表明,搭建的系统在-20~60℃能正常工作,在距离2m内不仅能实现准确识别,而且测温精度可达0.6℃。
In the multi-application of the Internet of Things (IoT), it is necessary to realize the identification and sensing functions simultaneously, which is one of the advantages of surface acoustic wave (SAW) technology. A SAW tag with encoding capacity of nearly 3 million is designed by using the scheme of combining the pulse time delay and phase encoding, and the principle of integrated identification and temperature measurement is analyzed. In order to improve the accuracy and stability of identification and temperature measurement, a digital orthogonal demodulation scheme based on radio frequency direct under-sampling is used to design the corresponding reader.A miniaturized folded dipole antenna is designed and fabricated on the flexible circuit board, which expands the application field. The actual test results show that the built-up system can work normally in the temperature range of -20~ 60 ℃, and can not only realize accurate identification within 2 m, but also reach the temperature measurement precision of 0.6 ℃.
部分文件列表
| 文件名 | 大小 |
| 声表面波射频识别与温度传感一体化系统.pdf | 2M |
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