Response of P(VDF-TrFE) sensor to force and temperature

Stuart Hannah, Deepak Uttamchandani, Saleem Khan, Ravinder Dahiya, Helena Gleskova

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Abstract

Responses of a tactile sensor to force (0 to 9 N) and temperature (15 to 47°C) are investigated. The sensor is based on ferroelectric polyvinylidene fluoride – trifluoroethylene (P(VDF-TrFE)) copolymer. The 2.5-µm-thick copolymer layer was sandwiched between aluminum and gold electrodes and the active sensing area was 25 mm2. The response of the sensor was measured in a form of capacitance recorded at 2 kHz. The capacitance was measured in a steady-state condition, i.e. after the force and temperature have stabilized. We have found that the sensor’s sensitivity to temperature is comparable to that of force, and even greatly exceeds the force sensitivity when dealing with forces larger than 3 N. This is because the response of the sensor to temperature is approximately linear, while the response to the applied force is logarithmic. Consequently, at the lower end of applied forces (< 0.5 N), the sensitivity is 7.5 pF/N while the temperature sensitivity is about 7 pF/°C within the whole temperature range.
LanguageEnglish
Title of host publication2015 International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME)
PublisherIEEE
Number of pages4
Publication statusAccepted/In press - 1 May 2015
EventIEEE PRIME 2015 - University of Glasgow, Glasgow, United Kingdom
Duration: 29 Jun 20152 Jul 2015

Conference

ConferenceIEEE PRIME 2015
CountryUnited Kingdom
CityGlasgow
Period29/06/152/07/15

Fingerprint

Sensors
Temperature
Capacitance
Copolymers
Ferroelectric materials
Gold
Aluminum
Electrodes

Keywords

  • P(VDF-TrFE)
  • capacitance
  • temperature response
  • pressure response

Cite this

Hannah, S., Uttamchandani, D., Khan, S., Dahiya, R., & Gleskova, H. (Accepted/In press). Response of P(VDF-TrFE) sensor to force and temperature. In 2015 International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME) IEEE.
Hannah, Stuart ; Uttamchandani, Deepak ; Khan, Saleem ; Dahiya, Ravinder ; Gleskova, Helena. / Response of P(VDF-TrFE) sensor to force and temperature. 2015 International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME). IEEE, 2015.
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Hannah, S, Uttamchandani, D, Khan, S, Dahiya, R & Gleskova, H 2015, Response of P(VDF-TrFE) sensor to force and temperature. in 2015 International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME). IEEE, IEEE PRIME 2015, Glasgow, United Kingdom, 29/06/15.

Response of P(VDF-TrFE) sensor to force and temperature. / Hannah, Stuart; Uttamchandani, Deepak; Khan, Saleem ; Dahiya, Ravinder; Gleskova, Helena.

2015 International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME). IEEE, 2015.

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

TY - CHAP

T1 - Response of P(VDF-TrFE) sensor to force and temperature

AU - Hannah, Stuart

AU - Uttamchandani, Deepak

AU - Khan, Saleem

AU - Dahiya, Ravinder

AU - Gleskova, Helena

N1 - (c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Responses of a tactile sensor to force (0 to 9 N) and temperature (15 to 47°C) are investigated. The sensor is based on ferroelectric polyvinylidene fluoride – trifluoroethylene (P(VDF-TrFE)) copolymer. The 2.5-µm-thick copolymer layer was sandwiched between aluminum and gold electrodes and the active sensing area was 25 mm2. The response of the sensor was measured in a form of capacitance recorded at 2 kHz. The capacitance was measured in a steady-state condition, i.e. after the force and temperature have stabilized. We have found that the sensor’s sensitivity to temperature is comparable to that of force, and even greatly exceeds the force sensitivity when dealing with forces larger than 3 N. This is because the response of the sensor to temperature is approximately linear, while the response to the applied force is logarithmic. Consequently, at the lower end of applied forces (< 0.5 N), the sensitivity is 7.5 pF/N while the temperature sensitivity is about 7 pF/°C within the whole temperature range.

AB - Responses of a tactile sensor to force (0 to 9 N) and temperature (15 to 47°C) are investigated. The sensor is based on ferroelectric polyvinylidene fluoride – trifluoroethylene (P(VDF-TrFE)) copolymer. The 2.5-µm-thick copolymer layer was sandwiched between aluminum and gold electrodes and the active sensing area was 25 mm2. The response of the sensor was measured in a form of capacitance recorded at 2 kHz. The capacitance was measured in a steady-state condition, i.e. after the force and temperature have stabilized. We have found that the sensor’s sensitivity to temperature is comparable to that of force, and even greatly exceeds the force sensitivity when dealing with forces larger than 3 N. This is because the response of the sensor to temperature is approximately linear, while the response to the applied force is logarithmic. Consequently, at the lower end of applied forces (< 0.5 N), the sensitivity is 7.5 pF/N while the temperature sensitivity is about 7 pF/°C within the whole temperature range.

KW - P(VDF-TrFE)

KW - capacitance

KW - temperature response

KW - pressure response

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BT - 2015 International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME)

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Hannah S, Uttamchandani D, Khan S, Dahiya R, Gleskova H. Response of P(VDF-TrFE) sensor to force and temperature. In 2015 International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME). IEEE. 2015