动态零电流法可降低可穿戴电子低阻值电阻式传感器阵列测量误差。

Dynamic Zero Current Method to Reduce Measurement Error in Low Value Resistive Sensor Array for Wearable Electronics.

机构信息

BME, National University of Singapore, Singapore 119077, Singapore.

Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

出版信息

Sensors (Basel). 2023 Jan 26;23(3):1406. doi: 10.3390/s23031406.

DOI:10.3390/s23031406

PMID:36772446

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9921154/

Abstract

One advantage of a resistive sensor array (RSA) with shared rows () and shared columns () is the reduced number of wires from to which can greatly lessen the complexity and burden on wearable electronic systems. However, the drawback is the crosstalk current effect between adjacent elements, which will lead to high measurement error. Although several solutions have been reported, they mainly focus on RSAs with high resistance (≥100 Ω). There is a lack of research that addresses RSAs with resistor values below 100 Ω. Here, we introduce a new circuit design named the dynamic zero current method (DZCM) to further decrease the measurement error. From the low value RSA test with ideal resistors, the DZCM exhibits lower error than the zero potential method (ZPM). In the case of the error variation ratio of amplifier offset voltage, the DZCM has a 4%/mV (row) to 7%/mV (column) ratio, while the ZPM has an almost 25%/mV (row) to 45%/mV (column) ratio and it increases with array size.

摘要

电阻式传感器阵列（RSA）具有共享行（）和共享列（）的优点，这可以大大减少从到的连线数量，从而极大地降低可穿戴电子系统的复杂性和负担。然而，缺点是相邻元件之间的串扰电流效应，这将导致高测量误差。尽管已经报道了几种解决方案，但它们主要集中在高电阻（≥100 Ω）的 RSA 上。缺乏针对电阻值低于 100 Ω 的 RSA 的研究。在这里，我们介绍了一种名为动态零电流法（DZCM）的新电路设计，以进一步降低测量误差。从具有理想电阻的低阻值 RSA 测试来看，DZCM 的误差小于零电位法（ZPM）。在放大器失调电压误差变化率的情况下，DZCM 的比值为 4%/mV（行）至 7%/mV（列），而 ZPM 的比值几乎为 25%/mV（行）至 45%/mV（列），并且随着阵列尺寸的增加而增加。