BATTERY-POWERED DEVICE FOR MONITORING PHYSICAL DISTANCING THROUGH WIRELESS TECHNOLOGY

One method for preventing the spread of the coronavirus and other contagious diseases is through social distancing. Therefore, creating a tool to measure and quickly discover the precise distance is necessary. In order to prevent physical contact between individuals, this study aimed to detects individuals’ physical distance, through an inaugurated battery-powered device that monitors physical distance through wireless technology. Specifically, in public or crowded areas, to lessen the spread of the virus. This study focuses on detecting people’s physical distance in the region of interest utilizing an Ultrasonic and VL53L0X sensors and determining the significant difference between the two sensors in monitoring physical distance. This study employs an applied experimental research design. The efficiency of both sensors in measuring physical distance was evaluated through analysis. The Ultrasonic and VL53L0X sensors underwent 15 tests. Furthermore, the researchers effectuated a t-test to determine the significant difference between the two sensors. Data gathered revealed that the sensors’ combined mean in terms of measuring physical distance indicates that the ultrasonic sensor performed better than VL53L0X, measuring 134.7 cm, notwithstanding 99.8 cm for the VL53L0X sensor. Complementary to this, the results of the t-test show that the VL53L0X sensor and Ultrasonic sensor have a significant difference in terms of distance precision

Efficiency Performance Optimization of Wireless Power Transfer System with Magnetic Resonance

Electrical EngineeringWireless Power Transfer (WPT) system has attracted people???s attention for a kind of power transfer mechanism. This technology provides energy to communication devices or electrical devices without the power connection. The concept of Wireless Power Transfer (WPT) can be traced back to the early 20th century when Nikola Tesla patented several techniques related to transmitting power over air. However, there was not demanded due to the lack of portable electrical devices. Recently, the usage of mobile devices such as cell phones, PDAs, laptops, tablets, and other handheld gadgets equipped with rechargeable batteries has been widely spreading. That???s why this technology has been attracting a lot of attention of scientists and R&D firms around the world to remove recharge cables. Wireless Power Transfer (WPT) system supports the usability to supply power for electrical devices without any connecting to power source directly. The point of requirement of the applications using Wireless Power Transfer (WPT) system is transfer efficiency for reducing energy loss. Also, resonator size is important factor to apply real applications. In this thesis, technology to improve the system performance of Wireless Power Transfer (WPT) in magnetic resonance based scheme is described. Also, optimal efficiency conditions are derived and used to design optimal adaptive matching technique.ope