Real-Time Acquisition Circuit for Irregular Flexible Pressure Sensor Arrays

Abstract

Irregular flexible pressure sensor arrays face critical bottlenecks of poor layout adaptability, low scanning efficiency, and high implementation cost in dynamic pressure monitoring. To address these challenges, this paper proposes a low-cost, high-real-time data acquisition system based on STM32microcontroller.For hardware, a configurable row-column addressing circuit withCD4052/CD4051analog multiplexers is designed to match compact irregular arrays, enabling0~5000g wide-range pressure sensing. For algorithm, a novel"1+4"fast scanning strategy is developed to optimize dynamic pressure detection, delivering51%higher efficiency than traditional full-traversal scanning. A Qt multi-threaded host computer is built for10Hz real-time heatmap visualization. Experimental results demonstrate that the system achieves±0.5N measurement accuracy and ≤50ms end-to-end latency under72MHz clock and 12-bit ADC configuration. This work fills the technical gap in low-cost real-time monitoring for irregular flexible arrays, and provides a reliable solution for smart medical mattresses and industrial robotic tactile perception.