基于近场通信技术的无线无源体温传感器

Wireless Passive Body Sensor for Temperature Monitoring Using Near Field Communication Technology

该文设计了一种无线体温传感器(WBTS),无需单独电源供电,使用时只需将WBTS与具有近场通信(NFC)功能的手机贴近即可在应用程序上实现体温数据的实时采集。WBTS主要由数字体温探头(d-BTP)、NFC模块和天线三部分组成。d-BTP采用单片芯片实现体温数据的采集和处理,NFC模块和天线实现NFC手机和WBTS之间的无线能量传输和数据通信。d-BTP和NFC模块之间采用通用异步传输收发器通信协议,并采用数据压缩技术提高传输效率和降低功耗。经过测试,在(32~42)℃范围内,WBTS的误差为±0.1℃。WBTS具有精度高、功耗低、抗干扰能力强、无需独立电源供电等特点,可以集成到可穿戴设备中用于体温监护和健康管理。

In this study, we designed a wireless body temperature sensor （WBTS） based on near field communication （NFC） technology. Just attaching the WBTS to a mobile phone with NFC function, the real-time body temperature of human subjects can be acquired by an application program without seperate power supply. The WBTS is mainly composed of a digital body temperature probe （d-BTP）, a NFC unit and an antenna. The d-BTP acquires and processes body temperature data through a micro controller, and the NFC unit and antenna are used for wireless energy transmission and data communication between the mobile phone and WBTS. UART communication protocol is used in the communication between the d-BTP and NFC unit, and data compression technique is adopted for improving transmission efficiency and decreasing power loss. In tests, the error of WBTS is ±0.1℃, in range of 32 ℃ to 42℃. The WBTS has advantages of high accuracy, low power loss, strong anti-interference ability, dispensation with independent power supply etc., and it can be integrated into wearable apparatuses for temperature monitoring and health management.