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Design and verification of a micro piezoelectric motor with energy harvesting characteristic for capsule endoscope

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Abstract

Wireless capsule endoscopy has the distinctive advantage of providing trustworthy results without substantial discomforts to patients. However, lack of capsule active motion control and energy supply have been significant obstacles preventing wider applications of this technology. To overcome these problems, this paper presents a micro piezoelectric motor with energy harvesting feature. The motor is driven by a single-phase voltage and can be used in capsule endoscopy. The stator was constructed by bonding two PZT plates (PZT1 and PZT2) onto the adjacent outer surfaces of a metal base. PZT1 and PZT2 can both be used to excite the in-plane bending modes of the stator to generate a traveling wave in the stator. The PZT plate supplied with no-exciting voltage source can be used to convert the superfluous vibration energy of stator body into electric energy to power small electronic devices. The elliptical trajectories of points on the stator surface result from a superposition of the two bending modes. The vibration and energy conversion characteristics of the stator were analyzed by using the finite element analysis software ANSYS. The structure parameters of the stator were adjusted until the mode mixture of the stator disappeared. A prototype motor was fabricated and tested to explore its mechanical and electric energy output abilities. The size of the prototype motor is about 9.8×9.2×22.0 mm3. The tested resonance frequencies of the operating modes are 15.305 kHz and 15.815 kHz, respectively. The maximum no-load speed is 85 rpm. The applied single-phase driving voltage is 100 Vo-p (peak voltage) at frequency of 15.54 kHz. The stall torque is 0.98 mN·m, and the maximum output power of the harvesting PZT plate is 127 mW under an optimal equivalent load resistance of 5.16 kΩ.

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Abbreviations

φ :

Phase difference between two resonance modes

W :

Width of the PZT plate

ΔW :

Deformation along the width direction

E 3 :

Applied electric field intensity

S :

Strain of the harvesting PZT plate

T 1 :

Stress on the harvesting PZT plate

c :

Elastic stiffness constant

ε PZT :

Dielectric constant of the PZT plate

E3’:

Converted electric field intensity

S 1 :

Strain of the PZT plate in the width direction

References

  1. X. M. Ye, J. J. Cabibihan and W. J. Yoon, Design and verification of a flexible device for steering a tethered capsule endoscope in the stomach, 14th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) (2017) 550–555.

  2. Y. L. Shi and C. S. Zhao, A new standing-wave-type linear ultrasonic motor based on in-plane modes, Ultrasonics, 51 (4) (2011) 397–404.

    Article  Google Scholar 

  3. L. K. Chang and M. C. Tsai, Design of single-phase driven screw-thread-type ultrasonic motor, Review of Scientific Instruments, 87 (5) (2016) 055002.

    Article  Google Scholar 

  4. Z. Z. Chen, Y. Chen and T. Y. Zhou, A nut-type ultrasonic motor driven with single phase signal, Vibration Engineering and Technology of Machinery (2015) 835–843.

  5. S. T. Ho and S. J. Jan, A piezoelectric motor for precision positioning applications, Precision Engineering, 43 (2016) 285–293.

    Article  Google Scholar 

  6. C. Li, C. Y. Lu and Y. X. Ma, A piezoelectric motor driven by a single-phase signal, J. of Vibroengineering, 19 (4) (2017) 2645–2653.

    Article  Google Scholar 

  7. K. Yokoyama, H. Tamura and K. Masuda, Single-phase drive ultrasonic linear motor using a linked twin square plate vibrator, Japanese J. of Applied Physics, 52 (7S) (2013) 07HE03.

    Article  Google Scholar 

  8. S. W. Hsiao and M. C. Tsai, Single-phase drive linear ultrasonic motor with perpendicular electrode vibrator, Japanese J. of Applied Physics, 49 (2R) (2010) 024201.

    Article  Google Scholar 

  9. C. Li, C. Y. Lu and Y. X. Ma, Design of an ultrasonic motor with multi-vibrators, J. of Zhejiang University-SCIENCE A, 17 (9) (2016) 724–732.

    Article  Google Scholar 

  10. S. T. Ho and Y. J. Shin, Analysis of a linear piezoelectric motor driven by a single-phase signal, 2013 IEEE International Ultrasonics Symposium (IUS), IEEE (2013) 481–484.

  11. C. S. Zhao, Ultrasonic Motors: Technologies and Applications, Springer Science & Business Media (2011).

  12. Y. Li, Q. X. Yang and Z. Yan, Analysis on effective range of wireless power transfer and its impact factors, Transactions of China Electrotechnical Society, 28 (1) (2013) 106–112.

    Google Scholar 

  13. K. Kiani, Thermo-mechanical analysis of functionally graded plate-like nanorotors: A surface elasticity model, International J. of Mechanical Sciences, 106 (2016) 39–49.

    Article  Google Scholar 

  14. K. Kiani, In-plane vibration and instability of nanorotors made from functionally graded materials accounting for surface energy effect, Microsystem Technologies, 23 (10) (2017) 4853–4869.

    Article  Google Scholar 

  15. K. Kiani, Elasto-dynamic analysis of spinning nanodisks via a surface energy-based model, J. of Physics D Applied Physics, 49 (27) (2016) 275306.

    Article  Google Scholar 

Download references

Acknowledgments

This project is supported by the National Natural Science Foundation of China (No. 51577112), Aisheng Fund for Innovation and Development (ASN-IF2015-1302), Henan Provincial Education Department Project (19A535002), Key Laboratory Optoelectronic Sensing Integrated Application of Hennan Province and PhD Scientific Research Startup Subject (No. 5101239170004).

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Authors and Affiliations

  1. School of Electronic and Electrical Engineering, Henan Normal University, Xinxiang, 453007, China

    Chong Li

  2. The 365th Instrument, Northwestern Polytechnical University, Xian, 710072, China

    Rong Min

  3. Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Cunyue Lu

  4. School of Mechanical and Electrical Engineering and Automation, Shanghai University, Shanghai, 200240, China

    Chaodong Li

Authors
  1. Chong Li
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  2. Rong Min
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  3. Cunyue Lu
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  4. Chaodong Li
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Corresponding author

Correspondence to Chong Li.

Additional information

Recommended by Associate Editor Gyuhae Park

Chong Li received her Ph.D. in Instrument Science and Technology from Shanghai Jiao Tong University. Now she is working at Henan Normal University. Her research interests include piezoelectric motors and their applications.

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Li, C., Min, R., Lu, C. et al. Design and verification of a micro piezoelectric motor with energy harvesting characteristic for capsule endoscope. J Mech Sci Technol 33, 4577–4582 (2019). https://doi.org/10.1007/s12206-019-0901-1

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  • DOI: https://doi.org/10.1007/s12206-019-0901-1

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