Design and test of a new inductive force sensor

Robert Bram Giesberts, Victor IJzebrand Sluiter (Corresponding Author), Gijsbertus Jacob Verkerke

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review

3 Citations (Scopus)
157 Downloads (Pure)

Abstract

The currently accepted interval of weekly cast changes in the treatment of clubfeet seems unsubstantiated. A force sensor is needed to determine the adaptation rate of a clubfoot to establish what cast change interval would be most effective and efficient.We developed a force sensor based on the principle that the resonance frequency of an LC-tank changes when a metal target is brought in close proximity. A thin rubber ring between the LC-tank and the metal target transformed this proximity sensor into a force sensor. With a static load test and an incremental load test, the performance of the constructed force sensors was characterized. The custom-made sensor showed excellent sensitivity ((1.7 ± 0.8 × 105) counts/N), resolution ((0.15 ± 0.06) mN), and accuracy ((3.5 ± 3.0) %) for the application. The observed drift was (2.1 ± 0.7) %/log10(h), which is lower than other thin force sensors. Preliminary results of measurements in the treatment of Dupuytren fingers and clubfeet show good functioning for long-term force measurements.

Original languageEnglish
Article number2079
JournalSensors (Switzerland)
Volume18
Issue number7
DOIs
Publication statusPublished - 1 Jul 2018

Fingerprint

Clubfoot
sensors
Sensors
Metals
load tests
Rubber
Fingers
proximity
casts
Proximity sensors
Force measurement
intervals
static loads
rubber
metals
sensitivity
rings

Keywords

  • Force sensor
  • Induction
  • LDC
  • Drift

Cite this

Giesberts, Robert Bram ; Sluiter, Victor IJzebrand ; Verkerke, Gijsbertus Jacob. / Design and test of a new inductive force sensor. In: Sensors (Switzerland). 2018 ; Vol. 18, No. 7.
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title = "Design and test of a new inductive force sensor",
abstract = "The currently accepted interval of weekly cast changes in the treatment of clubfeet seems unsubstantiated. A force sensor is needed to determine the adaptation rate of a clubfoot to establish what cast change interval would be most effective and efficient.We developed a force sensor based on the principle that the resonance frequency of an LC-tank changes when a metal target is brought in close proximity. A thin rubber ring between the LC-tank and the metal target transformed this proximity sensor into a force sensor. With a static load test and an incremental load test, the performance of the constructed force sensors was characterized. The custom-made sensor showed excellent sensitivity ((1.7 ± 0.8 × 105) counts/N), resolution ((0.15 ± 0.06) mN), and accuracy ((3.5 ± 3.0) {\%}) for the application. The observed drift was (2.1 ± 0.7) {\%}/log10(h), which is lower than other thin force sensors. Preliminary results of measurements in the treatment of Dupuytren fingers and clubfeet show good functioning for long-term force measurements.",
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Design and test of a new inductive force sensor. / Giesberts, Robert Bram; Sluiter, Victor IJzebrand (Corresponding Author); Verkerke, Gijsbertus Jacob.

In: Sensors (Switzerland), Vol. 18, No. 7, 2079, 01.07.2018.

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review

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AB - The currently accepted interval of weekly cast changes in the treatment of clubfeet seems unsubstantiated. A force sensor is needed to determine the adaptation rate of a clubfoot to establish what cast change interval would be most effective and efficient.We developed a force sensor based on the principle that the resonance frequency of an LC-tank changes when a metal target is brought in close proximity. A thin rubber ring between the LC-tank and the metal target transformed this proximity sensor into a force sensor. With a static load test and an incremental load test, the performance of the constructed force sensors was characterized. The custom-made sensor showed excellent sensitivity ((1.7 ± 0.8 × 105) counts/N), resolution ((0.15 ± 0.06) mN), and accuracy ((3.5 ± 3.0) %) for the application. The observed drift was (2.1 ± 0.7) %/log10(h), which is lower than other thin force sensors. Preliminary results of measurements in the treatment of Dupuytren fingers and clubfeet show good functioning for long-term force measurements.

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