Integrated capacitive-resistive multiplexing technology for achieving pressure-strain decoupling in dual-parameter flexible sensor

Flexible sensors are widely used in various fields but still encounter significant challenges (crosstalk of electromechanical signals, internal information monitoring) in monitoring complex environment. To address this challenge, we report a dual-parameter flexible pressure sensor based on a capacitive-resistive multiplexing architecture that ensures multiple parameter acquisition. The dual-parameter flexible sensor comprises a pressure-insensitive strain sensing unit (NR-CNT/GO) and a cross-response pressure sensing unit (PDMS/CNT porous structure). The sensor shows excellent stability and responsiveness with a pressure range of 0–1000 kPa or a strain range of 0–150 % under a single stimulus. Additionally, the sensor has excellent resolution under dual stimuli, and the deviation between the theoretical model decoupling and the experimental data of the pressure sensing unit with cross-response is less than 13 %. Finally, a monitoring system with the sensor embedded in the rubber wheel (broad temperature range environment) demonstrates the application potential of the designed sensor for multi-parameter sensing under complex conditions.