A High-Resolution Film-Resistance Plantar Pressure Sensor

• Published in: IEEE sensors journal Vol. 23; no. 24; pp. 30213 - 30221
• Main Authors: Wang, Zhonghao, Zhao, Tiankai, Qu, Chunchun, Zhang, Rui, Li, Zhen, Bai, Xianxu, He, Zhizhu
• Format: Journal Article
• Language: English
• Published: New York IEEE 15-12-2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Biomedical monitoring; Bluetooth; Data acquisition; High resolution; High-resolution imaging; Immune system; Injury prevention; Insoles; intelligent insole system; Monitoring; piezoresistive principle; Plantar pressure; plantar pressure monitoring; Pressure sensors; Real time; Sensor arrays; Sensors; Surface resistance; Temperature sensors
• ISSN: 1530-437X; 1558-1748
• DOI: 10.1109/JSEN.2023.3329879

It is a crucial point to monitor real-time plantar pressure for application in physical condition assessment and sports injury diagnosis. In this work, we report a high-resolution (sensitive points number of 187) plantar pressure sensor (PPS) array based on the piezoresistive principle. It consists of a force-sensitive film (FSF) and a network of orthogonal conductive threads on both sides. The PPS could achieve a sensitivity of 0.124 kPa−1, a measurement range of up to 50 kPa, and excellent stability. An intelligent insole system consisting of a centimeter-level resolution PPS array, wireless Bluetooth transmitter data acquisition system, and wireless receiving terminal intelligent system is established to monitor and map the plantar pressure in real time. This intelligent insole system can identify various standing and sports positions, which is a terrific way to monitor health, avoid injuries, and train athletes.