Soft Magnetic Powdery Sensor for Tactile Sensing

Research output: Contribution to journalArticle

Abstract

Soft resistive tactile sensors are versatile devices with applications in next-generation flexible electronics. We developed a novel type of soft resistive tactile sensor called a soft magnetic powdery sensor (soft-MPS) and evaluated its response characteristics. The soft-MPS comprises ferromagnetic powder that is immobilized in a liquid resin such as polydimethylsiloxane (PDMS) after orienting in a magnetic field. On applying an external force to the sensor, the relative distance between particles changes, thereby affecting its resistance. Since the ferromagnetic powders are in contact from the initial state, they have the ability to detect small contact forces compared to conventional resistive sensors in which the conductive powder is dispersed in a flexible material. The sensor unit can be made in any shape by controlling the layout of the magnetic field. Soft-MPSs with different hardnesses that could detect small forces were fabricated. The soft-MPS could be applied to detect collisions in robot hands/arms or in ultra-sensitive touchscreen devices.

Original languageEnglish
JournalSensors (Basel, Switzerland)
Volume19
Issue number12
DOIs
Publication statusPublished - 2019 Jun 13

Fingerprint

Magnetic sensors
Touch
Powders
Magnetic Fields
sensors
Sensors
Equipment and Supplies
Hardness
Magnetic fields
Flexible electronics
Arm
Hand
Touch screens
end effectors
Polydimethylsiloxane
End effectors
magnetic fields
layouts
resins
Resins

Keywords

  • ferromagnetic powder
  • magnetic field orientation
  • soft material
  • tactile sensor

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

Soft Magnetic Powdery Sensor for Tactile Sensing. / Nagahama, Shunsuke; Migita, Kayo; Sugano, Shigeki.

In: Sensors (Basel, Switzerland), Vol. 19, No. 12, 13.06.2019.

Research output: Contribution to journalArticle

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