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Magnetic crack-based piezoinductive mechanical sensors: way to extreme robustness and ultra-sensitivity

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  • Yulian Peng

    (University of Science and Technology of China)

  • Zhengyan Wang

    (University of Science and Technology of China)

  • Houping Wu

    (University of Science and Technology of China)

  • Junchen Luo

    (Pohang University of Science and Technology)

  • Xinxin Chang

    (University of Science and Technology of China)

  • Yufeng Wang

    (University of Science and Technology of China)

  • Shiwu Zhang

    (University of Science and Technology of China)

  • Zhihua Feng

    (University of Science and Technology of China)

  • Unyong Jeong

    (Pohang University of Science and Technology)

  • Hongbo Wang

    (University of Science and Technology of China)

Abstract

Soft mechanical sensors with high performance, mechanical robustness, and manufacturing reproducibility are crucial for robotics perception, but simultaneously satisfying these criteria is rarely achieved. Here, we suggest a magnetic crack-based piezoinductive sensor (MC-PIS) which exploits the strain modulation of magnetic flux in cracked ferrite films. The MC-PIS is insensitive to fatigue-induced crack propagation and environmental changes, showing same performance even when scratched in half or run over by a car. It can detect bidirectional bending with a precision of 0.01° from −200° to 327°, allowing for real-time reconstruction of dynamic shape changes of a flexible ribbon. We demonstrate an artificial finger recognizing surface topology and musical notes via vibrations, a crawling robot responding appropriately to external stimuli, a tree-planting gripper performing consecutive tasks from digging soil, removing stones, to placing trees. The MC-PIS opens a new paradigm to develop ultrasensitive yet highly robust sensors in real-world robotics applications.

Suggested Citation

  • Yulian Peng & Zhengyan Wang & Houping Wu & Junchen Luo & Xinxin Chang & Yufeng Wang & Shiwu Zhang & Zhihua Feng & Unyong Jeong & Hongbo Wang, 2025. "Magnetic crack-based piezoinductive mechanical sensors: way to extreme robustness and ultra-sensitivity," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-61784-0
    DOI: 10.1038/s41467-025-61784-0
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