Flexible Bond Wire Capacitive Strain Sensor for Vehicle Tyres

Research output: Contribution to journalArticlepeer-review

Standard

Flexible Bond Wire Capacitive Strain Sensor for Vehicle Tyres. / Cao, Siyang; Pyatt, Simon; Anthony, Carl; Kubba, Ammar; Kubba, Ali; Olatunbosun, Oluremi.

In: Sensors, Vol. 16, No. 6, 929, 21.06.2016.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Bibtex

@article{52ed70d18c3848cc9fafcf523c2c3eb2,
title = "Flexible Bond Wire Capacitive Strain Sensor for Vehicle Tyres",
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.",
keywords = "strain sensor, flexible, wire bonding, PDMS",
author = "Siyang Cao and Simon Pyatt and Carl Anthony and Ammar Kubba and Ali Kubba and Oluremi Olatunbosun",
year = "2016",
month = jun,
day = "21",
doi = "10.3390/s16060929",
language = "English",
volume = "16",
journal = "Sensors",
issn = "1424-8220",
publisher = "MDPI",
number = "6",

}

RIS

TY - JOUR

T1 - Flexible Bond Wire Capacitive Strain Sensor for Vehicle Tyres

AU - Cao, Siyang

AU - Pyatt, Simon

AU - Anthony, Carl

AU - Kubba, Ammar

AU - Kubba, Ali

AU - Olatunbosun, Oluremi

PY - 2016/6/21

Y1 - 2016/6/21

N2 - 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.

AB - 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.

KW - strain sensor

KW - flexible

KW - wire bonding

KW - PDMS

U2 - 10.3390/s16060929

DO - 10.3390/s16060929

M3 - Article

C2 - 27338402

VL - 16

JO - Sensors

JF - Sensors

SN - 1424-8220

IS - 6

M1 - 929

ER -