Ultra-low power MEMS activity sensor for wireless health monitoring system

Hironao Okada, Hirofumi Nogami, Takeshi Kobayashi, Takashi Masuda, Toshihiro Itoh

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    This paper presents the design and implementation of a MEMS activity sensor operating at less than 50 nW for monitoring of the simple health conditions of animals, particularly of chickens. The developed MEMS activity sensor includes a piezoelectric microcantilever, a low power comparator integrated with a CMOS multi-step voltage reference generator, and a counter. This system enables the realization of a wireless sensor node to work continuously for more than two years using a 1.55 V button battery weighing 0.5 g.

    Original languageEnglish
    Pages (from-to)70-71
    Number of pages2
    JournalIEEJ Transactions on Sensors and Micromachines
    Issue number3
    Publication statusPublished - 2014

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Electrical and Electronic Engineering


    Dive into the research topics of 'Ultra-low power MEMS activity sensor for wireless health monitoring system'. Together they form a unique fingerprint.

    Cite this