A low-cost capacitive relative humidity sensor for food moisture monitoring application

Bo Wang, Man Kay Law, Amine Bermak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

In this paper, a low-cost capacitive relative humidity hygrometer suitable for food moisture monitoring is presented. The variation of dielectric constant of polyimide film to relative humidity enables the sensor's functionality. A fully differential capacitance to digital converter is utilized as the hygrometer digital readout, which is immune to circuit wiring parasitic and enable the sensor's long-term stability. The humidity sensor is implemented using TSMC1P6M 0.18μm technology with thick top metal option. Simulation results indicate that an inaccuracy of +6/-5%RH can be achieved sensing from 10%RH ∼ 90%RH, with 5.4μW power consumption for sensing and 21.6mW power consumption for sensor heating.

Original languageEnglish
Title of host publicationProceedings of the 4th Asia Symposium on Quality Electronic Design, ASQED 2012
Pages95-99
Number of pages5
DOIs
Publication statusPublished - 26 Nov 2012
Event4th Asia Symposium on Quality Electronic Design, ASQED 2012 - Penang, Malaysia
Duration: 10 Jul 201211 Jul 2012

Publication series

NameProceedings of the 4th Asia Symposium on Quality Electronic Design, ASQED 2012

Other

Other4th Asia Symposium on Quality Electronic Design, ASQED 2012
CountryMalaysia
CityPenang
Period10/7/1211/7/12

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality

Cite this

Wang, B., Law, M. K., & Bermak, A. (2012). A low-cost capacitive relative humidity sensor for food moisture monitoring application. In Proceedings of the 4th Asia Symposium on Quality Electronic Design, ASQED 2012 (pp. 95-99). [6320483] (Proceedings of the 4th Asia Symposium on Quality Electronic Design, ASQED 2012). https://doi.org/10.1109/ACQED.2012.6320483