Thermotag: item-level temperature sensing with a passive RFID tag
Thermotag: item-level temperature sensing with a passive RFID tag
复制标题
DOI：
10.1145/3458864.3467879
复制
发表时间：
2021-06
期刊：
影响因子：
--
通讯作者：
Xingyu Chen;Jia Liu;Fu Xiao;Shigang Chen;Lijun Chen
中科院分区：
文献类型：
--
作者：
Xingyu Chen;Jia Liu;Fu Xiao;Shigang Chen;Lijun Chen
温度传感在消防安全和冷链监控等各种应用中，在维护质量保证和满足法规合规性方面发挥着重要作用。然而，现有的温度测量设备体积庞大，成本高昂，或电池供电，使得物品级感测和智能成本高昂。在本文中，我们提出了一种新的基于标签的温度计称为Thermotag，它使用一个共同的无源RFID标签来感测温度，具有低成本，无电池，对环境条件的鲁棒性的竞争优势。Thermotag的基本思想是标签芯片中半导体二极管的电阻对温度敏感。通过反向极化二极管测量放电周期，可以间接估计温度。我们提出了一个符合标准的测量方案，通过使用标签的易失性存储器的放电周期和温度之间的映射模型建立准确和可靠的温度传感。我们使用商业现成的RFID系统实现Thermotag，无需任何固件或硬件修改。大量的实验表明，该测温仪具有0 ℃ ~ 85 ℃的大量程，平均误差为2.7 ℃
Temperature sensing plays a significant role in upholding quality assurance and meeting regulatory compliance in a wide variety of applications, such as fire safety and cold chain monitoring. However, existing temperature measurement devices are bulky, cost-prohibitive, or battery-powered, making item-level sensing and intelligence costly. In this paper, we present a novel tag-based thermometer called Thermotag, which uses a common passive RFID tag to sense the temperature with competitive advantages of being low-cost, battery-free, and robust to environmental conditions. The basic idea of Thermotag is that the resistance of a semiconductor diode in a tag's chip is temperature-sensitive. By measuring the discharging period through the reverse-polarized diode, we can estimate the temperature indirectly. We propose a standards-compliant measurement scheme of the discharging period by using a tag's volatile memory and build a mapping model between the discharging period and temperature for accurate and reliable temperature sensing. We implement Thermotag using a commercial off-the-shelf RFID system, with no need for any firmware or hardware modifications. Extensive experiments show that the temperature measurement has a large span ranging from 0 °C to 85 °C and a mean error of 2.7 °C.