Effects of Loading, Walking Speed, and Piezoelectric Position on Output Voltage as an Electric Generator on Shoes

Shoes are a suitable medium for applying piezoelectric sensors to generate voltage because humans always do daily activities such as walking or running, which can be a source of pressure that can be converted into electrical energy. This study analyzes the effect of loading, speed, and piezoelectric sensor placement configuration on the output voltage of the circuit. The variables in this study include user weight, user walking speed, and piezoelectric sensor placement on the shoe. The piezoelectric sensor placement consists of four designs: Design 1 places the piezoelectric sensor on the upper back of the shoe sole, Design 2 places it on the lower back of the shoe sole, Design 3 places it on the upper and lower back of the shoe sole, and Design 4 places it on the front and back of the shoe sole. Testing with body weight variables is done with a repetition step of ten times for each design, and testing with speed variables is done by measuring the voltage increase on the capacitor. From the test results and data analysis, body weight, speed, and piezoelectric sensor placement affect the output voltage of the prototype. The highest voltage obtained is 7.92 volts, and the highest voltage obtained is 7.92 volts.