Establishment of simultaneous estimating Young's modulus and viscosity of materials using motional capacitance change of a quartz-crystal tuning-fork tactile sensor

• Project/Area Number: 23560501
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Measurement engineering
• Research Institution: Shinshu University
• Principal Investigator: ITOH Hideaki 信州大学, 工学部, 教授 (60143989)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 音叉型水晶振動子 / 触覚センサ / 動的容量 / 粘弾性 / ３Ｄプリンタ / 音叉型振動子 / 粘弾性体

Research Abstract

I have constructed the analytical model for the motional capacitance of a quartz-crystal tuning-fork tactile sensor. Especially, depicting the materials in contact with the senso's base as the Voigt viscoelastic body is new. I have derived the analytical formula for the motional capacitance of the electrical equivalent circuit of the sensor at resonance based on the law of energy conservation which the electrostatic energy in motional capacitance is equal to the sum of the strain energy of the quartz arm and the loss of energy of the materials in contact with the sensor's base. I can prove that the change in reciprocal motional capacitance is caused by the dynamic Young's modulus and viscosity of viscoelastic materials since the calculated values are approximately equal to the measured values of the change in reciprocal motional capacitance before and after the sensor's base comes into contact with neoprene rubbers and plastic materials. This work will be published in JJAP.

Research Products

• [Journal Article] Analysis of change in motional capacitance of quartz crystal tuning-fork tactile sensor induced by viscoelastic materials in contact with its Base
  • Author(s): Hideaki Itoh, Naoki Hatakeyama
  • Journal Title: Japanese J. Appl. Phys Volume: (印刷中)
  • Peer Reviewed
• [Presentation] Analysis of Change in Motional Capacitance of Quartz Crystal Tuning Fork Tactile Sensor Induced by Viscoelastic Materials in Contact with Its Base (2013)
  • Author(s): Hideaki Itoh, Naoki Hatakeyama
  • Organizer: 2013 Joint UFFC, EFTF and PFM Symposium
• [Presentation] Analysis of Quality Factor of Quartz Crystal Tuning Fork Using L-Shaped Bar Model with Torsion Spring (2013)
  • Author(s): Keisuke Sugiura, Hideaki Itoh
  • Organizer: 2013 Joint UFFC, EFTF and PFM Symposium
• [Presentation] Analysis of Change in Motional Capacitance of Quartz-Crystal Tuning-Fork Tactile Sensor Induced by Viscoelastic Materials in Contact with Its Base (2013)
  • Author(s): Hideaki Itoh, Naoki Hatakeyama
  • Organizer: 2013 Joint UFFC, EFTF and PFM Symposium
  • Place of Presentation: Prague, Czech Republic
• [Presentation] Analysis of Quality Factor of Quartz-Crystal Tuning Fork Using L-Shaped Bar Model with Torsion Spring (2013)
  • Author(s): Keisuke Sugiura, Hideaki Itoh
  • Organizer: 2013 Joint UFFC, EFTF and PFM Symposium
  • Place of Presentation: Prague, Czech Republic
• [Presentation] Analysis of the Motional Capacitance of the Electric Equivalent Circuit of Quartz Crystal Tuning Fork Using L-Shaped Bar Model with Torsion Spring and in Consideration of Electric Field Distribution (2012)
  • Author(s): Takahiro Ishikawa, Hideaki Itoh
• [Presentation] Analysis of Motional Capacitance of Quartz Crystal Tuning Fork Tactile Sensor Using Both L-shaped Bar Model and Electromechanical Coupling Coefficient (2012)
  • Author(s): Takahiro Ishikawa, Hideaki Itoh
  • Organizer: Proc. of the 2012 IEEE Ultrasonics Symposium
• [Presentation] Analysis of the Motional Capacitance of the Electric Equivalent Circuit of Quartz-Crystal Tuning Fork Using L-Shaped Bar Model with Torsion Spring and in Consideration of Electric Field Distribution (2012)
  • Author(s): Takahiro Ishikawa, Hideaki Itoh
  • Organizer: 2012 European Frequency and Time Forum
  • Place of Presentation: Gothenburg, Sweden
• [Presentation] Analysis of Motional Capacitance of Quartz-Crystal Tuning Fork Tactile Sensor Using Both L-shaped Bar Model and Electromechanical Coupling Coefficient (2012)
  • Author(s): Takahiro Ishikawa, Hideaki Itoh
  • Organizer: Proc. of the 2011 IEEE Ultrasonics Symposium
  • Place of Presentation: Dresden, Germany
• [Presentation] Elucidation of Change in Motional Capacitance of Quartz Crystal Tuning Fork Tactile Sensor Induced by Viscoelastic Materials in Contact with Its Base (2011)
  • Author(s): Hideaki Itoh, Naoki Hatakeyama, Susumu Itoh
  • Organizer: Proc. of Symposium on Ultrasonic Electronics
  • Year and Date: 2011-11-10
• [Presentation] Elucidation of Change in Motional Capacitance of Quartz-Crystal Tuning-Fork Tactile Sensor Induced by Viscoelastic Materials in Contact with Its Base (2011)
  • Author(s): Hideaki Itoh, Naoki Hatakeyama, Susumu Itoh
  • Organizer: Proc. of Symposium on Ultrasonic Electronics
  • Place of Presentation: 京都大学