Analytical model for structure design of floating element wall shear stress micro-sensor with capacitive sensing

Guanghui Ding, Binghe Ma, Jinjun Deng, Weizheng Yuan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The capacitive sensor with a micro floating element can measure the wall shear stress in the flow boundary layer directly. The sensor output voltage is linear to the applied wall shear stress and it is much more precise than conventional methods. We built up the analytical model for the sensor design by studying how structural parameters influence the sensor performances. The sensor consists of a floating element, folded tethers, movable comb fingers, fixed comb fingers and anchors, etc. And the sensor performances include measurement range, natural frequency, nonlinearity, sensitivity and resolution. The relationships between structural parameters and sensor performances are clarified explicitly by the analytical model. And the micro-sensor design becomes much easier and more efficient. Static and dynamic calibration were carried out and the results indicate a good agreement with predictions of the analytical model.

Original languageEnglish
Pages (from-to)53-59
Number of pages7
JournalShiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics
Volume31
Issue number3
DOIs
StatePublished - 1 Jun 2017

Keywords

  • Analytical model
  • Capacitive sensing
  • Sensor performance
  • Structure design
  • Wall shear stress

Fingerprint

Dive into the research topics of 'Analytical model for structure design of floating element wall shear stress micro-sensor with capacitive sensing'. Together they form a unique fingerprint.

Cite this