Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 05, 2021 - September 08, 2021
The authors have been developing a smart gear health monitoring system by sintering of conductive ink. The health state of a gear can be monitored through the characteristics of the sintered sensors on the surface of the gear. Furthermore, a wireless antenna communication system consists of two similar antenna patterns; one belongs to a receiver terminal, and the other belongs to the gear connecting with the mentioned sensors as a close circuit has been developed. A practical experiment has stated that, in accordance with two health conditions of the sensors including healthy – the conductivity of the sensors was high and unhealthy – the conductivity of the sensors was lost, the forms of the return loss signals received by the network analyzer were different. Specifically, the return loss of the monitoring antenna turned from one valley form of a single monitoring antenna to two valleys form when a smart gear with integrated healthy sensors and antenna was brought close to it. However, these two valleys form was changed remarkably to one deep and one shallow valley form when another smart gear with unhealthy sensors had substituted the previous smart gear with healthy sensors. By observation, it is simply to realize that the health conditions of the sensors on the smart gear sensors have a considerable impact on the resonant return loss signal of the coupling system.
