Mitsubishi Heavy Industries Technical Review
    Vol. 57 No. 1 (2020)   New Products & Technologies
    Technical Papers

    Wireless Power Transmission Technology for Wireless Sensing on Rotor

    Kenji Iizuka,
    Jun Yasui,
    Hiromu Okamoto,
    Naoki Oyama,
    Keiichi Morishita,
    Kouichi Ishizaka

    In the development of gas turbines, vibration data measurement is performed for rotor blade vibration analysis. In this measurement, a vibration sensor, which is attached to one of the rotor blades, is connected to the data transmitter (i.e., wireless telemeter) that is attached to the rotor (rotating likewise), etc. The obtained vibration data are then transmitted from the wireless telemeter. As it is impossible to wire the telemeter with a power supply, it is currently powered by batteries installed nearby, naturally necessitating the frequent replacement of batteries. The resulting measurement interruptions have been an issue. We are working on the development of power transmission technology that enables continuous power supply and eliminates the need for turbine shutdown. This report presents our progress in this endeavor.