Minimized bolus-type wireless sensor node with a built-in three-axis acceleration meter for monitoring a Cow’s Rumen conditions

Hirofumi Nogami, Shozo Arai, Hironao Okada, Lan Zhan, Toshihiro Itoh

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    Monitoring rumen conditions in cows is important because a dysfunctional rumen system may cause death. Sub-acute ruminal acidosis (SARA) is a typical disease in cows, and is characterized by repeated periods of low ruminal pH. SARA is regarded as a trigger for rumen atony, rumenitis, and abomasal displacement, which may cause death. In previous studies, rumen conditions were evaluated by wireless sensor nodes with pH measurement capability. The primary advantage of the pH sensor is its ability to continuously measure ruminal pH. However, these sensor nodes have short lifetimes since they are limited by the finite volume of the internal liquid of the reference electrode. Mimicking rumen atony, we attempt to evaluate the rumen condition using wireless sensor nodes with three-axis accelerometers. The theoretical life span of such sensor nodes depends mainly on the transmission frequency of acceleration data and the size of the battery, and the proposed sensor nodes are 30.0 mm in diameter and 70.0 mm in length and have a life span of over 600 days. Using the sensor nodes, we compare the rumen motility of the force transducer measurement with the three-axis accelerometer data. As a result, we can detect discriminative movement of rumen atony.

    Original languageEnglish
    Article number687
    JournalSensors (Switzerland)
    Volume17
    Issue number4
    DOIs
    Publication statusPublished - Apr 2017

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry
    • Biochemistry
    • Atomic and Molecular Physics, and Optics
    • Instrumentation
    • Electrical and Electronic Engineering

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