Gesture Interface Made by Conductive Rubber-based Sensors for Omnidirectional Platform Control

The paper presents the design and testing of a gesture interface that was accomplished by using conductive rubber sheet sensors. To test the material characteristics and operation condition, a system able to meet this purpose has been designed, as well. Also, to allow both the analog and digital data acquisition from the same sensor, an adaptive interface was implemented by a low-voltage operational amplifier, which produces digital output even if the input range dynamically modifies under different test conditions. This is possible via a PWM real-time input reference alteration that provides voltage adapting to the dynamical conditions. The conductive rubber electric resistance value has been compensated after testing, and the resulted data demonstrates the gesture interface is appropriate enough to be applied in such cases. The system includes three ESP32 connected in a Wi-Fi network, one being the access point, which also allows the data acquisition as PC interface, the second covers the gesture interface transmission requirements, the third ensures the mobile platform operation. Also, the system and strategy can be involved in the testing of after materials of this kind, or even different with certain small technical changes.