Daniel Ssu-Han Chen

Agency for Science, Technology and Research

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About

Daniel Ssu-Han Chen is a researcher specializing in piezoelectric micromachined ultrasonic transducers (pMUTs) and ultrasonic sensing systems, with a focus on advancing precision measurement technologies for real-world applications. His work sits at the intersection of MEMS device engineering, signal processing, and applied ultrasonics, targeting challenges in robotics, industrial automation, and close-range detection. Chen's most significant contribution is his development of techniques for operating pMUTs below their resonance frequency to achieve wide bandwidth ultrasonic ranging in air — a counterintuitive but effective approach that substantially improves distance measurement resolution and frequency performance. His 2021 paper on high-resolution, high-frequency ultrasonic ranging has garnered 23 citations, establishing him as a credible voice in the pMUT research community. Building on this foundation, his 2024 work introduced cross-correlation techniques applied to Silicon-on-Nothing pMUT architectures, enabling accurate time-of-flight detection for close-range vibration sensing with high resolution. Collectively, Chen's research addresses practical limitations in ultrasonic transducer technology, offering solutions that bridge device-level innovation with system-level performance. His contributions provide a meaningful foundation for researchers developing next-generation sensing platforms in robotics and precision industrial applications.