A low-frequency acceleration sensor inspired by saccule in human vestibule.

Journal: The Review of scientific instruments
Published Date: Feb 1, 2023

Abstract

A human vestibular system is a group of devices in the inner ear that govern the balancing movement of the head, in which the saccule is responsible for sensing gravity accelerations. Imitating the sensing principle and structure of the Sensory Hair (SH) cell in the saccule, a Bionic Sensory Hair (BSH) was developed, and 9 BSH arrays were arranged in the bionic macular at the bottom of the spherical shell to prepare a Bionic Saccule (BS). Based on the piezoelectric equation, the electromechanical theoretical models of the BSH cantilever and BS were deduced. They were subjected to impact oscillations using an exciter, and their output charges were analyzed to check their sensing ability. The results showed that BSH could sense its bending deflection, and the BS could sense its position change in the sagittal plane and in space. They exhibited a sensitivity of 1.6104 Pc s/m and a fast response and similar sensing principles and low resonance frequency to those of the human saccule. The BS is expected to be used in the field of robotics and clinical disease diagnosis as a part of the artificial vestibular system in the future.

Authors

  • Yani Jiang
    College of Mechanical Engineering, Yangzhou University, No. 196 West Huayang Road, Yangzhou, China.
  • Jialong Liu
    College of Mechanical Engineering, Yangzhou University, No. 196 West Huayang Road, Yangzhou, China.
  • Wenxuan Zhang
    College of Mechanical Engineering, Yangzhou University, No. 196 West Huayang Road, Yangzhou, China.
  • Guangcheng Xiang
    College of Mechanical Engineering, Yangzhou University, No. 196 West Huayang Road, Yangzhou, China.
  • Yuhang Chen
    School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China,People's Republic of China.
  • Can He
    College of Mechanical Engineering, Yangzhou University, No. 196 West Huayang Road, Yangzhou, China.
  • Hui Shen
    College of Mechatronics and Automation, National University of Defense Technology, Changsha, China.
  • Junjie Gong
    College of Mechanical Engineering, Yangzhou University, No. 196 West Huayang Road, Yangzhou, China.
  • Yixiang Bian
    College of Mechanical Engineering, Yangzhou University, No. 196 West Huayang Road, Yangzhou, China.

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