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

IF 2 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

HardwareX Pub Date : 2025-02-12 DOI:10.1016/j.ohx.2025.e00628

Richie Ellingham , Lui Holder-Pearson , Chris Pretty , Tim Giffney

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引用次数: 0

Abstract

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

\pm 0.3 μ 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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一种便携式电阻抗断层成像压力映射传感器和力定位验证系统

这项工作提出了便携式、低成本的硬件，用于使用基于eit的软传感器进行压力映射。开发这些基于eit的压力传感器的一个重要部分是传感器的特性。因此，这项工作还提供了一个系统的设计，用于表征和验证不同软传感器材料域的空间、压力和时间性能。该系统能够使用一系列传感材料、形状和配置驱动基于软eit的传感器。硬件允许无线传输EIT数据到远程设备。12.7 Hz的数据捕获帧率允许动态事件的分析。最大电流驱动电压为±22 V，电压读取分辨率为±0.3μV，适用于各种传感域尺寸、厚度和材料。已经开发了一种用于自动压力映射传感器特性的笛卡尔力施加器装置，该装置可以以0 - 800 mm/min的速率应用和检测0至100 N的负载，分辨率为±50 mN。负载的应用误差为±0.01 mm。为研究人员提供了一种标准化的方法来实验一系列不同的传感领域材料和形状。该系统具有良好的研究和实际应用价值，是推动基于eit的软压力映射传感器技术发展的重要工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

HardwareX Engineering-Industrial and Manufacturing Engineering

CiteScore

4.10

自引率

18.20%

发文量

124

审稿时长

24 weeks

期刊介绍： HardwareX is an open access journal established to promote free and open source designing, building and customizing of scientific infrastructure (hardware). HardwareX aims to recognize researchers for the time and effort in developing scientific infrastructure while providing end-users with sufficient information to replicate and validate the advances presented. HardwareX is open to input from all scientific, technological and medical disciplines. Scientific infrastructure will be interpreted in the broadest sense. Including hardware modifications to existing infrastructure, sensors and tools that perform measurements and other functions outside of the traditional lab setting (such as wearables, air/water quality sensors, and low cost alternatives to existing tools), and the creation of wholly new tools for either standard or novel laboratory tasks. Authors are encouraged to submit hardware developments that address all aspects of science, not only the final measurement, for example, enhancements in sample preparation and handling, user safety, and quality control. The use of distributed digital manufacturing strategies (e.g. 3-D printing) is encouraged. All designs must be submitted under an open hardware license.