基于微流体的无源自传感RFID标签研究

The self-sensing RFID tag, which could permit to achieve information about target without the need of additional electronics or sensors, enables to detect the target and transmit the information through the radio at the same time. The advantages of passive, low cost and batch-readable make it fit in well with market demand as large quantities, low cost, wireless micro sensor node. However, only limited targets are available for present self-sensing RFID tags and the new self-sensing tags rely strongly on the adoption of new materials which makes the pre-work complicated and slow. In respect of the issues above, this project will integrate microfluidics into the self-sensing RFID tags and take advantages of the characteristics of fluid and RFID communication to realize the detection and transmission of the target information. The sensing mechanisms, design method, performance analyses, indicator computation, fabrication and measurement of the microfluidics-based self-sensing RFID tags will have a complete confer in this project. The research results of this project will provide new solutions for the design and application of self-sensing tags, contribute to enhance the design freedom of the tags and expand more types of sensing targets, which forecasts a vast potential of the microfluidics-based self-sensing RFID tags for future development in the construction of the wireless sensor network.

自传感RFID标签是无需加载传感器或其他检测装置，自身即可实现对目标的传感的RFID标签。它集成了目标检测与射频识别功能，可以在检测目标信息的同时将信息通过射频信号传输出去；继承了传感器和无源RFID标签的优点，非常符合无线传感网络中大批量、低成本、无线通讯的微型传感器节点的需求。目前的自传感RFID标签所能传感的目标类型较少，新型自传感标签发展较为缓慢。针对以上问题，本项目将微流体集成到无源自传感RFID标签中，以微流体为载体，利用流体自身具有的特性和RFID系统通讯实现对目标信息的检测与传输，对基于微流体的无源自传感RFID标签的传感机制、设计方法、标签性能、传感计算、加工工艺和测试方案等进行全面深入研究。本项目的研究成果将为自传感标签的设计与应用提供新的解决方案，有助于增加自传感RFID标签设计的自由度、拓展可传感信息类型，在物联网无线传感网络的构建中有着广阔的发展前景。

自传感RFID标签是自身即可实现对目标的传感的RFID标签。它集成了目标检测与射频识别功能，可以在检测目标信息的同时将信息通过射频信号传输出去；同时继承了传感器和无源RFID标签的优点，非常符合无线传感网络中大批量、低成本、无线通讯的微型传感器节点的需求。本项目将微流体集成到无源自传感RFID标签中，以微流体为载体，利用流体自身具有的特性和RFID系统通讯实现对目标信息的检测与传输，对基于微流体的无源自传感RFID标签的传感机制、设计方法、标签性能、传感计算、加工工艺和测试方案等进行了全面深入研究。.项目的主要研究内容包括：在传感机制、材料特性和结构选型的基础上，通过等效电路解析和全波仿真等完成标签及微流结构的设计与分析；通过对通讯性能与传感性能的权衡，确定标签的通讯距离和传感范围，对标签天线匹配状态进行调整，进一步优化传感范围内的通讯性能；研究基于微流体的自传感RFID标签喷墨印刷加工工艺流程，并在分析计算的基础上改进测试方案以简化测试计算、减少损耗对结果的影响；在传感方案的基础上完成基于微流体的超高频无源自传感RFID标签的设计、加工及测试。.本项目的研究成果可以为自传感标签的设计与应用提供新的解决方案，有助于增加自传感RFID标签设计的自由度、拓展可传感信息类型，在物联网无线传感网络的构建中有着广阔的发展前景。