Water-Rescue Robot Vehicle with Variably Configured Segmented Wheels. - Hironao Okada; Taro Iwamoto; Koji Shibuya (J. Robotics Mechatronics, 2006)

Battery-less wireless current sensor node utilizing the dependence of charging time of a capacitor on the current flowing through a power line. - Hironao Okada; Toshihiro Itoh (IEICE Electron. Express, 2013)

Development of a Wireless Sensor for the Measurement of Chicken Blood Flow Using the Laser Doppler Blood Flow Meter Technique. - Kei Nishihara 002; Wataru Iwasaki 002; Masaki Nakamura; Eiji Higurashi; Tomoki Soh; Toshihiro Itoh; Hironao Okada; Ryutaro Maeda; Renshi Sawada (IEEE Trans. Biomed. Eng., 2013)

Wireless vibration sensing system powered by a piezoelectric MEMS vibration energy harvester. - Ryohei Takei; Hironao Okada; Takeshi Kobayashi; Daiji Noda; Ryo Ohta; Toshihiro Itoh (IEEE SENSORS, 2016)

Ultra-thin piezoelectric strain sensor array integrated on flexible printed circuit for structural health monitoring. - Takahiro Yamashita; Hironao Okada; Takeshi Kobayashi; Kazuyoshi Togashi; Daniel Zymelka; Seiichi Takamatsu; Toshihiro Itoh (IEEE SENSORS, 2016)

Low-power and high-sensitive pH sensor for monitoring of cow-rumen in real time. - Lan Zhang; Jian Lu; Hironao Okada; Hirofumi Nogami; Toshihiro Itoh; Shozo Arai (IEEE SENSORS, 2016)

Wearable wireless estrus detection sensor for cows. - L. Mattias Andersson; Hironao Okada; Ryotaro Miura; Yi Zhang; Koji Yoshioka; Hiroshi Aso; Toshihiro Itoh (Comput. Electron. Agric., 2016)

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 (Sensors, 2017)

Electrolyte-Flow-Controlled Reference Electrode using Hydrogen Pressure for an Ultra-Long-Life Rumen pH Sensor. - Shogo Higuchi; Seiichi Takamatsu; Toshihiro Itoh; Hironao Okada (IEEE SENSORS, 2019)

Valve-Actuator-Integrated Reference Electrode for an Ultra-Long-Life Rumen pH Sensor. - Shogo Higuchi; Hironao Okada; Seiichi Takamatsu; Toshihiro Itoh (Sensors, 2020)

Estrus detection in tie-stall housed cows through supervised machine learning using a multimodal tail-attached device. - Shogo Higaki; Hironao Okada; Chie Suzuki; Reina Sakurai; Tomoko Suda; Koji Yoshioka (Comput. Electron. Agric., 2021)