A portable electrical impedance tomography based pressure mapping sensor and force localisation validation system

被引：0
作者：
Ellingham, Richie [1 ]
Holder-Pearson, Lui [2 ]
Pretty, Chris [1 ]
Giffney, Tim [1 ]
机构：
[1] Canterbury Univ, Mech & Mechatron Engn Dept, Christchurch 8041, Canterbury, New Zealand
[2] Canterbury Univ, Elect & Elect Engn Dept, Christchurch 8041, Canterbury, New Zealand
来源：
HARDWAREX | 2025年 / 21卷
关键词：
Soft sensor; Pressure mapping; Artificial skin; Portable; Electrical impedance tomography; Research and development kit; COMPOSITES; RECONSTRUCTION; SKIN;
D O I：
10.1016/j.ohx.2025.e00628
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This work presents portable, low-cost hardware for pressure mapping using EIT-based soft sensors. An important part of developing these EIT-based pressure sensors is the sensor characterisation. Therefore, this work also provides the design of a system for characterising and validating the spatial, pressure, and temporal performance of different soft sensor material domains. The system is capable of driving soft EIT-based sensors using a range of sensing materials, shapes, and configurations. The hardware allows for the wireless transmission of EIT data to a remote device. A data capture frame rate of 12.7 Hz allows for the analysis of dynamic events. The maximum current drive voltage is +/- 22 V and a voltage read resolution of +/- 0.3 mu V allowing for a range of sensing domain sizes, thicknesses, and materials. A Cartesian force applicator device has been developed for the automated pressure mapping sensor characterisation which can apply and sense loads from 0 to 100 N with a resolution of +/- 50 mN at rates of 0- 800 mm/min. Loads can be applied with an error of +/- 0.01 mm. A standardised method has been provided for researchers to experiment with a range of different sensing domain materials and shapes. The system described in this work is suitable for both research and practical applications, making it a valuable tool for advancing the field of EIT-based soft pressure mapping sensor technology.
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页数：21
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