Schematic diagram of additional circuit for induced resonance.

The inductor symbol in the left OPAMP part of the drawing refers to the coil placed in the chest model, and the capacitor is a capacitor whose target resonance frequency is 34 kHz. The remainder on the right is the peak hold detector schematic.</p

Size and coils placement of chest manikin and defibrillator positioning paddle.

(a) chest manikin; (b) paddle.</p

Modeling and Implemented chest manikin.

(a) receiving coils array modeling using 3D CAD (b) fabricated chest manikin including receiving coils array.</p

Example of CPR training simulators.

(a) Laerdal–Anne; (b) BT–CPTA; Typical AED training devices are chest models and paddles as shown, which are mainly devices that include CPR and defibrillation related training functions.</p

Fabricated whole defibrillation simulator with function of position measurement system.

(a) demonstrate fabricated defibrillation simulator (b) display screen shows position measuring result.</p

Result graph of measured voltage at Fig 7 circuit output(ADC point).

Result graph of measured voltage at Fig 7 circuit output(ADC point).</p

Result graph of calculated position and error.

Red dotted line is ideal line and blue solid line (marked with circle) is reference versus calculated position result. And green solid line (marked with x) is position error compared with ideal position.</p

Contour graph to find errors.

It is the result of combining two single coil graphs separated by the same distance as the developed system.</p

Concept of position measurement system.

(a) arrangement of the receiving and transmitting coils; (b) concept of position measurement using inductance coupling.</p

Developed experimental device that is measured position detection performance.

(a) experimental device consist of manual milling machine, function generator, oscilloscope and auxiliary electrical circuitry (b) schematic diagram of system configuration (Fig 4a) (c) transmitting coil align with receiving coils (d) briefly drawn electrical circuit of experimental device.</p