Development of a Printed Coil for Wirelessly Charging a Tracking Elderly Patch  

作　　者：Bouchta Hajjine Christophe Escriba Samuel Charlot Anne Hemeryck Julien Roux Sabeha Fettouma Zedek Jean-Yves Fourniols Bouchta Hajjine;Christophe Escriba;Samuel Charlot;Anne Hemeryck;Julien Roux;Sabeha Fettouma Zedek;Jean-Yves Fourniols(CNRS, LAAS, Toulouse, France;Univ. de Toulouse, INSA, Toulouse, France)

机构地区：[1]CNRS, LAAS, Toulouse, France [2]Univ. de Toulouse, INSA, Toulouse, France

出　　处：《Wireless Engineering and Technology》2016年第2期83-95,共13页无线工程与技术（英文）

摘　　要：Monitoring systems for elderly require a compromise between reduced size and operational autonomy. The latter to get a system as independent as possible and to fit with our application needs for daily use. Our patch is developed as a surveillance system for old people;we chose to equip it with a wireless charging system for greater ease of use, imperceptible in the everyday life and waterproofing. This paper presents the development of a printed receiver coil to be integrated in a wireless charger to be used in an elderly tracking patch. The proposed design is validated using simulation that presents a good agreement with measurement results: Simulation (@150 KHz: L = 10.74 μH;R = 3 Ω) and Measurement (@150 KHz: L = 10.8 μH;R = 3.16 Ω). The receiver coil is elaborated on a polyimide substrate in the cleanroom of our laboratory LAAS-CNRS (Laboratory for Analysis and Architecture of Systems-National Center for Scientific Research) and a PCB (Printed Circuit Board) charger prototype is fabricated to test its performances before the integration of the wireless charging property in the tracking patch. The proposed coil presents a good compromise between small size and efficiency. For a charging current of 7.5 mA, this coil can ensure the recharging of the patch up to a distance of 4.8 mm between the Qi transmitter and receiver which is more than enough for our application.Monitoring systems for elderly require a compromise between reduced size and operational autonomy. The latter to get a system as independent as possible and to fit with our application needs for daily use. Our patch is developed as a surveillance system for old people;we chose to equip it with a wireless charging system for greater ease of use, imperceptible in the everyday life and waterproofing. This paper presents the development of a printed receiver coil to be integrated in a wireless charger to be used in an elderly tracking patch. The proposed design is validated using simulation that presents a good agreement with measurement results: Simulation (@150 KHz: L = 10.74 μH;R = 3 Ω) and Measurement (@150 KHz: L = 10.8 μH;R = 3.16 Ω). The receiver coil is elaborated on a polyimide substrate in the cleanroom of our laboratory LAAS-CNRS (Laboratory for Analysis and Architecture of Systems-National Center for Scientific Research) and a PCB (Printed Circuit Board) charger prototype is fabricated to test its performances before the integration of the wireless charging property in the tracking patch. The proposed coil presents a good compromise between small size and efficiency. For a charging current of 7.5 mA, this coil can ensure the recharging of the patch up to a distance of 4.8 mm between the Qi transmitter and receiver which is more than enough for our application.

关 键 词：Wireless Charger Receiving Coil Tracking Patch Cleanroom Process 

分 类 号：TN9[电子电信—信息与通信工程]