K. Ishii, I. Saito, Junya Fujii, Yusuke Oga, Shizuki Nakai, Sota Iima, Hiraoka Nobuaki
{"title":"Measurement of Micro-Strain in Nail Caused by Pulse Wave","authors":"K. Ishii, I. Saito, Junya Fujii, Yusuke Oga, Shizuki Nakai, Sota Iima, Hiraoka Nobuaki","doi":"10.14326/abe.9.31","DOIUrl":null,"url":null,"abstract":"The micro-strains of a ngernail and toenail caused by pulse wave were measured by a conventional strain measuring method using a biaxial strain gauge. The strain uctuations of nails were larger in the lateral direction than in the longitudinal direction. In a previous study, pulse wave measurement by a polyvinylidene di uoride (PVDF) lm, which is a piezo lm, attached to the nail surface was proposed as a new pulse wave measuring method with lower electrical power consumption. The piezo lm can transform a nail surface micro-strain caused by pulse wave into an electrical signal. However, the optimal orientation of the piezo lm on nails remains unclear. The experimental results of the present study showed that a larger displacement was generated from the nails to the piezo lms by aligning the longitudinal direction of the piezo lm with the lateral direction of the nails.","PeriodicalId":54017,"journal":{"name":"Advanced Biomedical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.8000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Biomedical Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14326/abe.9.31","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, BIOMEDICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The micro-strains of a ngernail and toenail caused by pulse wave were measured by a conventional strain measuring method using a biaxial strain gauge. The strain uctuations of nails were larger in the lateral direction than in the longitudinal direction. In a previous study, pulse wave measurement by a polyvinylidene di uoride (PVDF) lm, which is a piezo lm, attached to the nail surface was proposed as a new pulse wave measuring method with lower electrical power consumption. The piezo lm can transform a nail surface micro-strain caused by pulse wave into an electrical signal. However, the optimal orientation of the piezo lm on nails remains unclear. The experimental results of the present study showed that a larger displacement was generated from the nails to the piezo lms by aligning the longitudinal direction of the piezo lm with the lateral direction of the nails.