open access

https://hdl.handle.net/2115/97447

Water-Dynamics Monitoring Using a Flexible Resistive Sensor and Reservoir Computing

英語

water dynamics

2025-03-26

Wiley-Blackwell

Small

21(12)

2407698

Water droplets exhibit different dynamics upon contact with an object, depending on several factors, including the impact angle and droplet volume. Insights gained from monitoring the dynamics might be valuable in rain-sensing applications for analyzing precipitation and wind velocity. Notably, a resistive-type flexible rain sensor exists, which monitors the changes in resistance with time when a water droplet contacts an object. However, the dynamics sensing mechanism for water droplets contacting a conductive superhydrophobic surface has not been systematically explored, and importantly, the sensors can only be used at a 20 degrees tilt angle. Therefore, this study aims to reveal the sensing mechanism of resistive sensors by analyzing the vertical energy of water droplets impacting the sensor surface. By varying the conditions surrounding the vertical impact, we observe that the minimum resistance of the sensor to water droplets increases when the impact energy decreases at different dropping heights and sensor tilt angles. Further, a reservoir-computing algorithm is developed to assess the water dynamics at different sensor tilt angles, resulting in the successful estimation of the water-droplet volume and wind velocity.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: N. Seimiya, K. Uehara, H. Nakamura, G. Matsumura, T. Miyashita, K. Nakajima, K. Takei, Water-Dynamics Monitoring Using a Flexible Resistive Sensor and Reservoir Computing. Small 2025, 21, 2407698, which has been published in final form at https://doi.org/10.1002/smll.202407698. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

1613-6810