scholarly journals Design of Powering Wireless Medical Sensor Based on Spiral-Spider Coils

Designs ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 59
Author(s):  
Mustafa F. Mahmood ◽  
Sadik Kamel Gharghan ◽  
Saleem Latteef Mohammed ◽  
Ali Al-Naji ◽  
Javaan Chahl
Keyword(s):  
Heart Rate ◽  
Measurement Accuracy ◽  
Measurement Unit ◽  
Operating Voltage ◽  
Power Transfer ◽  
Wireless Power ◽  
Biomedical Sensors ◽  
Battery Capacity ◽  
Resonance Coupling ◽  
Rate Sensor

Biomedical sensors help patients monitor their health conditions and receive assistance anywhere and at any time. However, the limited battery capacity of medical devices limits their functionality. One advantageous method to tackle this limited-capacity issue is to employ the wireless power transfer (WPT) technique. In this paper, a WPT technique using a magnetic resonance coupling (MRC-WPT)-based wireless heart rate (WHR) monitoring system—which continuously records the heart rate of patients—has been designed, and its efficiency is confirmed through real-time implementation. The MRC-WPT involves three main units: the transmitter, receiver, and observing units. In this research, a new design of spiral-spider coil was designed and implemented for transmitter and receiver units, respectively, to supply the measurement unit, which includes a heart rate sensor, microcontroller, and wireless protocol (nRF24L01) with the operating voltage. The experimental results found that an adequate voltage of 5 V was achieved by the power component to operate the measurement unit at a 20 cm air gap between the receiver and transmitter coils. Further, the measurement accuracy of the WHR was 99.65% comparative to the benchmark (BM) instrument. Moreover, the measurements of the WHR were validated based on statistical analyses. The results of this study are superior to those of leading works in terms of measurement accuracy, power transfer, and Transfer efficiency.

scholarly journals Hybrid Coils-Based Wireless Power Transfer for Intelligent Sensors

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2549
Author(s):  
Mustafa F. Mahmood ◽  
Saleem Lateef Mohammed ◽  
Sadik Kamel Gharghan ◽  
Ali Al-Naji ◽  
Javaan Chahl
Keyword(s):  
Heart Rate ◽  
Power Efficiency ◽  
Wireless Power Transfer ◽  
Power Measurement ◽  
Measurement Unit ◽  
Resistive Load ◽  
Power Transfer ◽  
Wireless Power ◽  
Harvesting Technique ◽  
Rate Sensor

Most wearable intelligent biomedical sensors are battery-powered. The batteries are large and relatively heavy, adding to the volume of wearable sensors, especially when implanted. In addition, the batteries have limited capacity, requiring periodic charging, as well as a limited life, requiring potentially invasive replacement. This paper aims to design and implement a prototype energy harvesting technique based on wireless power transfer/magnetic resonator coupling (WPT/MRC) to overcome the battery power problem by supplying adequate power for a heart rate sensor. We optimized transfer power and efficiency at different distances between transmitter and receiver coils. The proposed MRC consists of three units: power, measurement, and monitoring. The power unit included transmitter and receiver coils. The measurement unit consisted of an Arduino Nano microcontroller, a heart rate sensor, and used the nRF24L01 wireless protocol. The experimental monitoring unit was supported by a laptop to monitor the heart rate measurement in real-time. Three coil topologies: spiral–spiral, spider–spider, and spiral–spider were implemented for testing. These topologies were examined to explore which would be the best for the application by providing the highest transfer power and efficiency. The spiral–spider topology achieved the highest transfer power and efficiency with 10 W at 87%, respectively over a 5 cm air gap between transmitter and receiver coils when a 200 Ω resistive load was considered. Whereas, the spider–spider topology accomplished 7 W and 93% transfer power and efficiency at the same airgap and resistive load. The proposed topologies were superior to previous studies in terms of transfer power, efficiency and distance.

scholarly journals Ultrasound Sensor-Based Wireless Power Transfer for Low-Power Medical Devices

2019 ◽  
Vol 9 (3) ◽  
pp. 20 ◽  
Author(s):  
Mustafa F. Mahmood ◽  
Saleem Latteef Mohammed ◽  
Sadik Kamel Gharghan
Keyword(s):  
Heart Rate ◽  
Low Power ◽  
Power Unit ◽  
Medical Devices ◽  
Wireless Power Transfer ◽  
Measurement Unit ◽  
Power Transfer ◽  
Rate Measurement ◽  
Wireless Power ◽  
Heart Rate Measurement

Ultrasonic power transfer (UPT) is a promising method for wireless power transfer technology for low-power medical applications. Most portable or wearable medical devices are battery-powered. Batteries cannot be used for a long time and require periodic charging or replacement. UPT is a candidate technology for solving this problem. In this work, a 40-KHz ultrasound transducer was used to design a new prototype for supplying power to a wearable heart rate sensor for medical application. The implemented system consists of a power unit and heart rate measurement unit. The power unit includes an ultrasonic transmitter and receiver, rectifier, boost converter and super-capacitors. The heart rate measurement unit comprises measurement and monitoring circuits. UPT-based transfer power and efficiency were achieved using 1-, 4- and 8-Farad (F) super-capacitors. At 4 F, the system achieved 69.4% transfer efficiency and 0.318 mW power at 4 cm. In addition, 97% heart rate measurement accuracy was achieved relative to the benchmark device. The heart rate measurements were validated with statistical analysis. Our results show that this work outperforms previous works in terms of transfer power and efficiency with a 4-cm gap between the ultrasound transmitter and receiver.

scholarly journals Development of wireless charging system along with power line communication used in Electric Vehicles

2019 ◽  
Vol 87 ◽  
pp. 01021
Author(s):  
Sai Varun Alapati ◽  
Indusaiteja Nadella ◽  
Phaneendra Babu Bobba ◽  
Madhur Deo Upadhayay
Keyword(s):  
Magnetic Resonance ◽  
Electric Vehicles ◽  
Wireless Power Transfer ◽  
Power Line ◽  
Simulation Software ◽  
Power Line Communication ◽  
Power Transfer ◽  
Wireless Power ◽  
Charging System ◽  
Resonance Coupling

Charging an Electric Vehicle wirelessly is the latest technology being developed for the electric vehicles replacing the traditional way of plugging to the supply. In this paper, authors explained how to integrate Power Line Communication along with wireless power transfer in EV. The entire system is implemented in ADS simulation software. We are adapting to magnetic resonance coupling method for wireless power transfer in EV. The overall ideology of the project is to design an innovative system which involves higher power transfer and implement smart communication system between vehicle and the grid while following the latest magnetic resonance charging standards.,

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