Design of a Wearable Device for SpO2 Monitoring Using BLE
1 Department of Biomedical Engineering, South China University of Technology, Guangzhou 510006, China
2 No. 421 Hospital of PLA, Guangzhou 510318, China
3 Hospital of South China University of Technology, Guangzhou 510640, China
Abstract：In this paper, we designed a wearable device for oxygen saturation monitoring, which can achieve real-time detection of SpO2. We designed and implemented several key modules, including a clip-on photoelectric sensor, an interface module of solar cell, and a module of bluetooth low energy (BLE). The hardware design used energy efficient components and modules. Monitoring data were transferred to the application of cellphone by BLE technology. The software design adopted an optimized strategy of data transmission. The wearable device has features of low power, wearable, and reliable, and thus is suitable for outdoor activities and oxygen saturation monitoring for hypoxic diseases patients. Test results showed that the final error rate of the bluetooth communication was 0 and the pulse rate was 980%. Most importantly, the accuracy of the oxygen saturation was 979% when the output of simulator was above 75%. Moreover, we also designed a power supply module using solar cell, in which the machine standby current was 11 μA and the battery life at peak power was more than 18 h. The cell performance of our device was better than those of fingertip pulse oximeters.
［1］2020年健康医疗预测报告》发布［J］.上海医药,2015,36(7):22.
［2］赵锦萌. 面向家庭的无线式多参数监护网络通信技术研究［D］. 广州: 华南理工大学,2012.
［3］汪朝红,吴凯,吴效明. 穿戴式生理检测技术的研究及应用［J］. 中国组织工程研究与临床康复,2007,22:4384-4387.
［4］吴效明,吴凯,岑人经,等. 多参数心脏功能远程监测系统的研制［J］. 医疗卫生装备,2004,（4）:17-18，21.
［5］Magno M, Spagnol C, Benini L, et al. A low power wireless node for contact and contactless heart monitoring［J］. Microelectronics Journal, 2014, 45(12): 1656-1664.
［6］Chong JW, Dao DK, Salehizadeh SMA, et al. Photoplethysmograph signal reconstruction based on a novel hybrid motion artifact detection\|reduction approach. Part I: Motion and noise artifact detection［J］. Annals of Biomedical Engineering, 2014, 42(11): 2238-2250.
［7］孙守军,吴凯,吴效明. 基于蓝牙技术的无线移动监护系统［J］. 中国医疗器械杂志,2006（5）:349-351.
［8］Randrianarisaina A. Modélisation de la consommation d’énergie En vue de la conception conjointe (matériel/logiciel) des applications embarquées. Application aux réseaux de capteurs sans fil (wsn)［D］. Nantes: Universite De Nantes, 2015.
［9］吴凯,吴效明. 多生理参数远程虚拟检测仪的设计与实现［J］. 微计算机信息,2006,（1）:145-146，179.
［10］Gautham K, Raghav G, Krishnamurthy V, et al. Personnel security system using Bluetooth Low Energy (BLE) tag［J］. International Journal of Engineering and Technology (IJET), 2013,5: 1527-1534.
［11］路知远. 穿戴式健康监护及人机交互应用中若干关键技术研究［D］. 合肥: 中国科学技术大学,2014.
［12］Khessib B, Sankar S, Baek W, et al. Hardware management communication protocol: U.S. Patent 8,938,529［P］. 2015-01-20.
［13］Ho QD, LeNgoc T. An integrated wireless communication platform for endtoend and automatic wireless vital sign capture using personal smart mobile devices ［M］// Adibi S. Mobile Health.Berlin: Springer International Publishing, 2015: 917-945.
［14］张历. 基于iOS操作系统的无线脉搏血氧仪设计与实现［D］. 天津: 天津大学,2014.
［15］杨易华. 穿戴式生理参数检测模块设计及低功耗与微型化研究［D］. 广州: 华南理工大学,2010.
［16］Krehel M, Wolf M, Boesel LF, et al. Development of a luminous textile for reflective pulse oximetry measurements［J］. Biomedical optics express, 2014, 5(8): 2537-2547.
［17］Lee YH, Kim JS, Noh J, et al. Wearable textile battery rechargeable by solar energy［J］. Nano letters, 2013, 13(11): 5753-5761.
［18］Sugiyama K, Tanishima M, Ukawa T. Measurement data monitor for medical equipment and measurement data monitoring system for medical equipment: U.S. Patent Application 14/195,470［P］. 2014-3-3.
［19］Adibi S, Mobasher A, Tofigh T. LTE networking: extending the reach for sensors in mHealth applications［J］.
