A Detection System with Spider Web Coil-Based Wireless Charging and an Active Battery Management System

Abstract

The article presents a detection system with spider web coil-based wireless charging. Commonly available metal detectors are sold as handheld systems, which enable only progressive, lengthy, time-consuming search. Importantly, a part of the investigated area can thus be easily missed, and the probability that a metal object will not be found increases substantially. This problem, however, is eliminable via the automatic position tracking mode embedded in the solution obtained through our research. The proposed system facilitates using the spider web coil simultaneously for wireless charging and metal detection by pulse induction. The topology of the detector can emit variable pulse lengths, thus allowing the device to detect more types of metal and to adapt itself to the permeability of the soil. The coil has a branch in a relevant part of the winding to reduce undesirable electromagnetic interference during the charging. On the transmitting side of the topology, impedance matching is included to maintain the maximum spatial gap variability. By changing the position of the receiving side, the output voltage changes; therefore, a high efficiency DC/DC converter is employed. The individual battery cells demonstrate different internal resistances, requiring us to apply a new method to balance the cells voltage. The system can be utilized on self-guided vehicles or drones; advantageously, a GPS resending the coordinates to a mesh radio allows for accurate positioning. With the mesh topology, potential cooperation between the multiple systems is possible. The setup utilizes the same coil for wireless power transfer and detection.

Powering implanted sensors that monitor human activity using spider‐web coil wireless power transfer

“…As recommended in related papers [29, 38], a SWC was adopted in the proposed WPT–MRC–SWC design for the following reasons: The adopted SWC construction method involves many turns in a small area, resulting in a reduced coil size, which is critical, particularly in biomedical applications. Increasing coil turns increases the mutual inductance between the transmitter and the receiver of the SWC. Consequently, power performance and transfer power efficiency improve. The construction of the SWC reduces parasitic capacitance compared to other coil types [39]. However, when the parasitic capacitance decreases, the performance of the SWC improves. …”

“…The construction of the SWC reduces parasitic capacitance compared to other coil types [39]. However, when the parasitic capacitance decreases, the performance of the SWC improves.…”

Powering Implanted Devices Wirelessly Using Spider-Web Coil

“…However, the design employs a spider-web coil winding technique to charge the IBM battery wirelessly. Although slightly used in IBM charging designs, the S-WC winding technique offers low parasitic capacitance [23] and high inductance due to its large surface area. Experimental implementation and testing of the adopted in various values of loads (50, 100, and 150Ω) and transmission distances between both investigated spider-web coils (extending from 10-100 mm in 10-mm increments) were conducted.…”

Effect of inductor types and shapes on the characteristics of an inorganic EL driven by wireless power transfer

“…When looked at from the axial direction, the area of the conductor is the largest of all, and the air core size is the smallest. A spider coil, or a spider web coil 29,30) is wound around a star-shaped form that has an odd number of tubs as shown in Fig. 3(b).…”