A proposal of new layer sensor based on PVDF film for material identification

Abstract This paper proposes a new layer sensor for material identification under the visible light. In the proposed sensor, the optical sensor and PVDF (polyvinylidene fluoride) film with the transparent conductive electrodes are layered. The optical properties of the material are measured by a light emitting diode (LED) and a phototransistor, and the electrical properties are measured by a pair of the transparent conductive electrodes of PVDF films arranged on the surfaces of the LED and phototransistor. In addition, the vibrational property is obtained by PVDF film. Therefore, the optical, electrical and vibrational properties of the material are measured by the proposed layer sensor. To test the sensor experimentally, eleven material samples – clear, white, blue, green and black acrylic, clear glass, white polytetrafluoroethylene, silver aluminum and sponge with three types of hardness – were prepared. In the contactless measurement under the visible light, the identification of their sample materials and the detection of distance between the sensor and the surface of material were demonstrated by using the measurement values of the optical and electrical properties in the proposed sensor. In addition, the hardness was detected by the vibrational property at the contact between the proposed sensor and the material. The results indicated the usefulness of the proposed layer sensor as the proximity and touch sensors for the material identification such as optical, electrical and hardness properties, although there are still some problems that must be addressed.

[1]  Mitsuhiro Shikida,et al.  Active tactile sensor for detecting contact force and hardness of an object , 2003 .

[2]  Jean-Paul Yonnet,et al.  Contactless position sensor using magnetic saturation , 2003 .

[3]  S. Mukhopadhyay,et al.  A novel planar mesh-type microelectromagnetic sensor. Part II. Estimation of system properties , 2004, IEEE Sensors Journal.

[4]  V. Mallapragada,et al.  Optical sensor for noncontact measurement of lignin content in high-speed moving paper surfaces , 2005, IEEE Sensors Journal.

[5]  K. Rajanna,et al.  Tactile sensor based on piezoelectric resonance , 2002, Proceedings of IEEE Sensors.

[6]  D. A. Hutchins,et al.  NONCONTACT ULTRASONIC DIAGNOSTICS IN CONCRETE: A PRELIMINARY INVESTIGATION , 2004 .

[7]  Christos E. Constantinou,et al.  Real time robotic tactile sensor system for the determination of the physical properties of biomaterials , 2004 .

[8]  Takaaki Oiwa,et al.  Three-dimensional touch probe using three fibre optic displacement sensors , 2004 .

[9]  J. Yuji,et al.  A new multi-functional tactile sensing technique for simultaneous discrimination of material properties , 1998, IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222).

[11]  R. Knöchel,et al.  Development of a Microwave Moisture Sensor for Application in the Food Industry , 1996 .

[12]  A. Namiki,et al.  High-speed sensory-motor fusion for robotic grasping , 2002 .

[13]  Rajeev Sharma,et al.  Noncontact level sensing technique using computer vision , 2002, IEEE Trans. Instrum. Meas..

[14]  Hiroyuki Shinoda,et al.  Tactile Sensing Using Nonlinear Elasticity , 2005 .

[15]  Gotthard Rieger,et al.  GMR sensors for contactless position detection , 2001 .

[16]  J. Engel,et al.  Polymer micromachined multimodal tactile sensors , 2005 .

[17]  Marco Parvis,et al.  Noise-tolerant ultrasonic distance sensor based on a multiple driving approach , 1995 .

[18]  M. Shimojo,et al.  A tactile sensor sheet using pressure conductive rubber with electrical-wires stitched method , 2004, IEEE Sensors Journal.

[19]  Sungchul Kang,et al.  Development of tactile sensor for detecting contact force and slip , 2005, 2005 IEEE/RSJ International Conference on Intelligent Robots and Systems.

[20]  Jo W. Spronck,et al.  A contactless capacitive angular-position sensor , 2003 .

[21]  Brian Culshaw,et al.  Non-contact measurement of the mechanical properties of materials using an all-optical technique , 2003 .

[22]  Katsunori Shida,et al.  The Property Analysis of a Plane Type Capacitance Sensor for Object Detection , 2003 .

[23]  Selahattin Sayil,et al.  Comparison of contactless measurement and testing techniques to a all-silicon optical test and characterization method , 2005, IEEE Transactions on Instrumentation and Measurement.

[24]  Antonino S. Fiorillo,et al.  A piezoresistive tactile sensor , 1997 .

[25]  Keigo Watanabe,et al.  Acoustical tactile sensor utilizing multiple reflections for principal curvature measurement , 2001, SICE 2001. Proceedings of the 40th SICE Annual Conference. International Session Papers (IEEE Cat. No.01TH8603).

[26]  Christian Berger.  Strain measurement of moving periodic objects with optical sensors , 2002, IEEE Trans. Instrum. Meas..

[27]  Reinoud F. Wolffenbuttel,et al.  Noncontact capacitive torque sensor for use on a rotating axle , 1990 .