Next Article in Journal
The Reusable Load Cell with Protection Applied for Online Monitoring of Overhead Transmission Lines Based on Fiber Bragg Grating
Next Article in Special Issue
Design and Analysis of a New Hair Sensor for Multi-Physical Signal Measurement
Previous Article in Journal
A Type of Low-Latency Data Gathering Method with Multi-Sink for Sensor Networks
Previous Article in Special Issue
Dispersion of Heat Flux Sensors Manufactured in Silicon Technology
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(6), 929; doi:10.3390/s16060929

Flexible Bond Wire Capacitive Strain Sensor for Vehicle Tyres

1
Department of Mechanical Engineering, University of Birmingham, Birmingham B15 2TT, UK
2
School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
3
Fusion Innovations Ltd., Research and Innovation Services, Birmingham Research Park, Vincent Drive, Edgbaston, Birmingham, B15 2SQ, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Stefano Mariani
Received: 22 February 2016 / Revised: 13 June 2016 / Accepted: 17 June 2016 / Published: 21 June 2016
(This article belongs to the Collection Modeling, Testing and Reliability Issues in MEMS Engineering)
View Full-Text   |   Download PDF [4008 KB, uploaded 21 June 2016]   |  

Abstract

The safety of the driving experience and manoeuvrability of a vehicle can be improved by detecting the strain in tyres. To measure strain accurately in rubber, the strain sensor needs to be flexible so that it does not deform the medium that it is measuring. In this work, a novel flexible bond wire capacitive strain sensor for measuring the strain in tyres is developed, fabricated and calibrated. An array of 25 micron diameter wire bonds in an approximately 8 mm × 8 mm area is built to create an interdigitated structure, which consists of 50 wire loops resulting in 49 capacitor pairs in parallel. Laser machining was used to pattern copper on a flexible printed circuit board PCB to make the bond pads for the wire attachment. The wire array was finally packaged and embedded in polydimethylsiloxane (PDMS), which acts as the structural material that is strained. The capacitance of the device is in a linear like relationship with respect to the strain, which can measure the strain up to at least ±60,000 micro-strain (±6%) with a resolution of ~132 micro-strain (0.013%). In-tyre testing under static loading has shown the ability of the sensor to measure large tyre strains. The technology used for sensor fabrication lends itself to mass production and so the design is considered to be consistent with low cost commercialisable strain sensing technology. View Full-Text
Keywords: strain sensor; flexible; wire bonding; PDMS strain sensor; flexible; wire bonding; PDMS
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Cao, S.; Pyatt, S.; Anthony, C.J.; Kubba, A.I.; Kubba, A.E.; Olatunbosun, O. Flexible Bond Wire Capacitive Strain Sensor for Vehicle Tyres. Sensors 2016, 16, 929.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top