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Related Experiment Video

Updated: May 14, 2026

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli

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Published on: August 2, 2016

Mechanically-triggered self-powered triboelectric sensor platform with arbitrary-to-constant mechanical input

Hee-Jin Ko¹, Wondo Kim¹, Sungjong Lee¹

¹School of Mechanical Engineering, Yonsei University, Seodaemun-Gu, Seoul, Republic of Korea.

Microsystems & Nanoengineering

|May 12, 2026

Summary

This study introduces a self-powered sensor platform that converts irregular mechanical inputs into consistent energy output. This innovation enables reliable environmental and chemical sensing for autonomous electronics.

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Area of Science:

Materials Science
Sensor Technology
Energy Harvesting

Background:

Self-powered sensors are crucial for autonomous electronics but struggle with inconsistent mechanical power sources.
Existing triboelectric sensors often suffer from signal ambiguity due to variable mechanical inputs.

Purpose of the Study:

To develop a mechanically triggered, self-powered sensor platform converting arbitrary mechanical inputs to constant energy output.
To demonstrate stable operation of triboelectric sensors independent of input variations.

Main Methods:

A magnetic latching mechanism was designed to store and release elastic potential energy in a cantilever system.
The released cantilever undergoes high-frequency vibration, generating consistent electrical output via triboelectric effect.
Two active sensors (humidity and ammonia) were fabricated using this platform with different sensing materials.

Main Results:

The platform demonstrated consistent vibration amplitude and frequency, independent of input ranges (25-35 mm amplitude, 0.1-1 Hz frequency).
Stable electrical outputs with less than 9.6% deviation were achieved across tested conditions.
Fabricated humidity and ammonia sensors showed highly stable, mechanical input-independent performance.

Conclusions:

The mechanically triggered architecture offers a robust solution for signal ambiguity in self-powered sensors.
This platform enables reliable, portable, and human-interactive sensing applications.
The system's adaptability to various sensing mechanisms and materials highlights its broad potential.