Quantification of a contact stimulus by diapers

Takuya Nomata, Takeshi Okuyama, Hiromi Teraoka, Yasuo Murakami, Kiyoshi Miyazawa, Mami Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


This paper describes a development of a sensor system for measurement of a contact stimulus which diapers give to infants. A polyvinyliden fluoride (PVDF) film and a strain gauge are used as the sensor receptors. The PVDF is a kind of piezoelectric material. The sensor consists of a surface contact layer, a PVDF film, a strain gauge and an aluminum plate. First, in order to investigate the sensor performance, the sensor was located on a silicone plate and the upper part of the sensor was rubbed with an acrylic artificial finger. The finger enabled the measurement to carry out at a constant speed and force. Next, the sensor was attached on an infant dummy and the sensor outputs were measured under conditions with and without diapers. By comparison of the output under two different conditions, it was confirmed that there is a clearly difference between the two conditions. It was found that the developed sensor system has the possibility to quantify a contact stimulus which diapers give infants.

Original languageEnglish
Title of host publicationICMIT 2009 - Mechatronics and Information Technology
Publication statusPublished - 2010
Event2009 International Conference on Mechatronics and Information Technology, ICMIT 2009 - Gwangju, Korea, Republic of
Duration: 2009 Dec 32009 Dec 5

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


Conference2009 International Conference on Mechatronics and Information Technology, ICMIT 2009
Country/TerritoryKorea, Republic of


  • Diaper rash
  • Measurement
  • PVDF film
  • Sensor system
  • Signal processing


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