研究目的
To establish a passive UHF RFID-based compression sensor with a referenced readout to compensate for multipath propagation effects and enable wireless sensing from any distance within the tag read range.
研究成果
The passive UHF RFID-based compression sensor with a referenced readout successfully demonstrated the ability to indicate compression levels wirelessly up to 2 meters, using minimal signal processing and fixed-frequency operation. This approach offers a maintenance-free sensing option for applications like structural health monitoring, with future work needed for optimization and environmental testing.
研究不足
The study is based on initial measurements; the robustness and accuracy of the compression indication need verification in various operational environments. The sensor tag's performance may be affected by materials and proximity coupling not fully considered in design.
1：Experimental Design and Method Selection:
The experiment involved designing a passive UHF RFID tag based on a split ring resonator antenna for compression sensing, with a reference tag for readout compensation. The methodology included wireless measurements in an anechoic chamber using an RFID measurement system to evaluate performance.
2：Sample Selection and Data Sources:
The sensor tag was fabricated using copper tape on an EPDM substrate, with an NXP UCODE G2iL RFID IC attached. A reference tag with a dipole antenna was used. Data were collected at various compression levels (6 cm to 1 cm apart).
3：List of Experimental Equipment and Materials:
Equipment included the Voyantic Tagformance RFID measurement system, an RFID reader, an anechoic chamber, copper tape, EPDM substrate, conductive silver epoxy, sponge material, plywood, and metallic bolts. Materials were selected for their properties in sensing and structural support.
4：Experimental Procedures and Operational Workflow:
The sensor platform was constructed with the split ring tag parts separated on a sponge, compressed to different distances. Wireless measurements were conducted to record threshold power and backscattered signal strength at frequencies from 0.8 to 1 GHz, specifically at 960 MHz for detailed analysis.
5：8 to 1 GHz, specifically at 960 MHz for detailed analysis.
Data Analysis Methods:
5. Data Analysis Methods: Data analysis involved calculating attainable read range using a formula based on wavelength, threshold power, and system constants. The relative difference in backscattered signal strength between the sensor and reference tags was used to identify compression levels, with statistical averaging and comparison to predefined ranges.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
