An Efficient Method for Calibrating Piezoresistive Pressure Sensor

This paper presents an efficient calibration method for piezoresistive pressure sensors. We applied this method to calibrate 35 pressure sensors integrated into an e-textile insole, utilizing machine-measured pressure-resistance pairs within the pressure range of 1–10 N as reference values for error assessment. The efficient calibration process required only 15 minutes, resulting in an average relative error of 14.4%. In contrast, traditional calibration methods necessitated more than two hours, achieving a relative error of 12.1%. This method effectively addresses the calibration challenges of piezoresistive pressure sensors within practical device and time cost constraints, holding significant implications for the real-world application of pressure sensor products that require frequent calibration.