Printed Wheatstone bridge with embedded polymer based piezoresistive sensors for strain sensing applications

被引：47

作者：

Castro, H. F. ^{[1
]}

Correia, V ^{[1
,2
]}

Pereira, N. ^{[1
]}

Costab, P. ^{[3
]}

Oliveiraa, J. ^{[2
]}

Lanceros-Mendez, S. ^{[3
,4
]}

机构：

[1] Univ Minho, Algoritmi Res Ctr, P-4800058 Guimaraes, Portugal

[2] Univ Minho, Dept Ctr Phys, P-4710057 Braga, Portugal

[3] Basque Ctr Mat Applicat & Nanostruct BCMat, Parque Tecnol Bizkaia, Derio 48160, Spain

[4] IKERBASQUE, Basque Fdn Sci, Bilbao 48013, Spain

来源：

ADDITIVE MANUFACTURING | 2018年 / 20卷

关键词：

Signal acquisition; Wheatstone bridge; Printed electronics; Screen-printing; SKIN;

D O I：

10.1016/j.addma.2018.01.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Printed sensors find an increasing interest essentially due to their characteristics of flexibility and low cost per unit area. In this work a screen printed Wheatstone bridge is presented, suitable for strain sensing applications. A piezoresistive ink composite based on biocompatible thermoplastic elastomer styrene-ethylene/butylene-styrene (SEBS) as matrix and multi-walled carbon nanotubes (MWCNT) as nanofillers was used as a piezoresistive sensing material. Different deposition techniques, such as, screen printing, spray painting and drop casting were evaluated in order to optimize the resistance variation related to the piezoresistive effect. Several Wheatstone bridges with one and two sensors were designed to obtain an output sensitivity as a function of the strain submitted to the sensors. Further, different sensor geometries were evaluated to maximize the strain output sensitivity. Electro-mechanical bending tests showed a good linearity and a sensitivity up to 18 mV/V in the all screen printed half Wheatstone bridge output with two MWCNT/SEBS sensors.

引用

页码：119 / 125

页数：7

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