Skip to content
  • Newsletter
  • About us
  • Contact
  • DE
  • EN
  • Newsletter
  • About us
  • Contact
  • DE
  • EN
  • Overview
  • Research
  • Here & now
  • Smart minds
  • Overview
  • Research
  • Here & now
  • Smart minds
  • Overview
  • Research
  • Here & now
  • Smart minds
  • Contact
  • Newsletter
  • About us
  • Overview
  • Research
  • Here & now
  • Smart minds
  • Contact
  • Newsletter
  • About us
Search
  • DE
  • EN
11. September 2019

Minimal pressure masured based on magnetism

IMPT | Classical gas pressure cannot be measured in this way – but the deformation of an elastic membrane. A measurement based on magnetism is possible when hard magnetic particles are embedded in the membrane. This is proved by experiments made at the Institute of Micro Production Technology (IMPT).

IMPT investigates a novel method, which is based on magnetism, to specifically measure contact pressure. The system consists of a membrane, which possesses magnetic properties due to embedded hard magnetic particles.

When an external force deforms the membrane, the strength of the magnetic field emitted by the membrane changes with respect to a fixed geometrical point. Placing a magnetic field sensor at the geometrical point allows an indirect measurement of the applied force (and the pressure through the area). An elastomer (polydimethylsiloxane – PDMS) is used as the membrane elastomer in combination with hard magnetic particles; the sensor is an anisotropic magnetoresistive layer.

Preliminary experiments showed a linearly proportional change in intrinsic resistance with an increase of applied force, which shows that it is in principle possible to measure pressure and determine spatial distribution, when using several sensors.

by Maren S. Prediger

Similar posts

  • Intelligent tire: Micro production technology meets rubber
  • In future robot designs, it’s all about softness
  • Biegsam statt starr: Daten speichern auf flexiblen Substraten
  • Kleiner Wandler, große Schwingung: Eine innovative Gehörhilfe

At a glance

  • Novel pressure measurement system based on magnetism
  • Linear relationship between pressure and sensor signal
  • Two tailorable system components for various applications
  • Applications range from biomedicine to soft robotics
IMPT_magnetische-Druckmessung_Bild-1_01
AMR sensors on flexible polyimide, sensor area: 770x1820 µm. (Photo: Christian Wittek/IMPT)
IMPT_magnetische-Druckmessung_Bild-2_01
AMR sensors embedded in polyimide with through-hole VIAS, designed as a flexible array. (Photo: Christian Wittek/IMPT)
IMPT_magnetische-Druckmessung_Bild-3_en
Preliminary demonstrator: AMR sensors on a glass substrate chip, on top: a magnetic elastomer. (Photo: Maren Prediger/IMPT)

Contact

Maren S. Prediger, M.Sc.

+49 (0)511 762-18023
prediger@impt.uni-hannover.de

This Page

drucken

recommend

  • tweet 

Similar posts

  • Intelligent tire: Micro production technology meets rubber
  • In future robot designs, it’s all about softness
  • Biegsam statt starr: Daten speichern auf flexiblen Substraten
  • Kleiner Wandler, große Schwingung: Eine innovative Gehörhilfe

This Page

drucken

recommend

  • tweet 

ISSN 2198-1922 | Legal Information | Privacy notice | Article Sitemap