Abstract
A wireless power transfer system for targeted therapy microrobots has been received more attention recently. However, it usually fails to work due to weak coupling caused by misalignment in position and angle between the transmitting coil and the receiving coil. It will not be tolerated even if it occurs at certain angles. To address this issue, a three-dimensional hybrid transmitting coil, combining a fixed Helmholtz coil pair and an adjustable curved rectangular coil pair, is proposed. Based on the novel structure, the proposed hybrid transmitting coil could produce a three-dimensional magnetic field, realizing well coupled with the receiving coil embedded on the microrobot at any posture. To verify the efficiency and practical applicability of the transmitting coil proposed in this paper, we build the coil model via both analytical calculation and simulation analysis. Finally, the designed hybrid transmitting coil is also implemented in the wireless power transfer system with a receiving coil. The magnetic field distribution indicates that a large and uniform magnetic field could be obtained. The experimental results demonstrate that in the central zone of the transmitting coil, 300 × 200 mm, the magnetic field distribution is uniform, which can meet the requirements of the microrobot system working area. And the maximum output efficiency and power can be reached at 5% and 1001 mW, respectively. What's more, the proposed hybrid transmitting coil has solved the weak coupling problem due to misalignment in position and angle with which the electromagnetic energy decays quickly.
Similar content being viewed by others
References
Wang, Y., Qi, M., Hao, Y., et al. (2019). The efficacy of prophylactic pancreatic stents against complications of post-endoscopic papillectomy or endoscopic ampullectomy: A systematic review and meta-analysis. Therapeutic Advances in Gastroenterology, 12, 1756284819855342.
Holtmann, G. J., Huelsen, A., Shah, A., et al. (2021). Is a fundamental design change for gastrointestinal endoscopes required? Journal of Clinical Gastroenterology, 55(1), 21–24.
Consolo, U., Bellini, P., & Lizio, G. (2018). Trans-nasal endoscopic marsupialization of a voluminous radicular cyst involving maxillary sinus and nasal cavity: A case report and a literature review on this surgical approach. Oral and Maxillofacial Surgery Cases, 4(3), 91–96.
Kim, C., Sullivan, C., Hillstrom, A., et al. (2021). Intermittent embedding of wire into 3D prints for wireless power transfer. International Journal of Precision Engineering and Manufacturing, 22, 919–931.
Min, J., Yang, Y., Wu, Z., et al. (2020). Robotics in the gut. Advanced Therapeutics, 3(4), 1900125.
Sealock, R. J., Thrift, A. P., El-Serag, H. B., et al. (2018). Long-term follow up of patients with obscure gastrointestinal bleeding examined with video capsule endoscopy. Medicine, 97(29).
Lay, H. S., Cummins, G., Cox, B. F., et al. (2018). In-vivo evaluation of micro ultrasound and thermometric capsule endoscopes. IEEE Transactions on Biomedical Engineering, 66(3), 632–639.
Yang, Y. J. (2020). The future of capsule endoscopy: The role of artificial intelligence and other technical advancements. Clinical Endoscopy, 53(4), 387.
Kjølhede, T., Ølholm, A. M., Kaalby, L., et al. (2021). Diagnostic accuracy of capsule endoscopy compared with colonoscopy for polyp detection: Systematic review and meta-analyses. Endoscopy, 53(07), 713–721.
Han, D., Yan, G., Wang, Z., et al. (2020). The modelling, analysis, and experimental validation of a novel micro-robot for diagnosis of intestinal diseases. Micromachines, 11(10), 896.
Rehan, M., Al-Bahadly, I., Thomas, D. G., & Avci, E. (2020). Capsule robot for gut microbiota sampling using shape memory alloy spring. International Journal of Medical Robotics Computer Assisted Surgery, 16(5), 1–14.
Shi, Y., Yan, G., Zhu, B., et al. (2015). A portable wireless power transmission system for video capsule endoscopes. Bio-Medical Materials and Engineering, 26(s1), S1721–S1730.
Zhiwei, J., Guozheng, Y., & Bingquan, Z. (2014). Portable wireless power transmission system for video capsule endoscopy. Journal of Medical Engineering & Technology, 38(7), 351–358.
Ye, C., Wang, J., Fang, Q. (2019). A small wireless power transfer system for the capsule endoscopy. In 2019 IEEE international conference on integrated circuits, technologies and applications (ICTA) (pp. 166–167). IEEE.
Han D, Yan G, Kuang S, et al. Preliminary Study on a Three-coil Wireless Power Transfer System for Endoscope Micro-robot of Intestinal Diagnosis: Design, Optimization and Validation. Journal of Electrical Engineering & Technology, 2022: 1–12.
Ryu, M., Kim, J. D., Chin, H. U., et al. (2007). Three-dimensional power receiver for in vivo robotic capsules. Medical & Biological Engineering & Computing, 45(10), 997–1002.
Gao, J., Yan, G., Shi, Y., et al. (2019). Analysis of connection way of a three-dimensional receiving coil onboard a capsule robot for wireless power transmission. Progress in Electromagnetics Research, 78, 39–48.
Carta, R., Sfakiotakis, M., Pateromichelakis, N., et al. (2011). A multi-coil inductive powering system for an endoscopic capsule with vibratory actuation. Sensors and Actuators A: Physical, 172(1), 253–258.
Basar, M. R., Ahmad, M. Y., Cho, J., et al. (2016). Stable and high-efficiency wireless power transfer system for robotic capsule using a modified Helmholtz coil. IEEE Transactions on Industrial Electronics, 64(2), 1113–1122.
Wang, K., Yan, G., Ma, G., et al. (2009). An earthworm-like robotic endoscope system for human intestine: Design, analysis, and experiment. Annals of biomedical engineering, 37(1), 210–221.
Ke, Q., Luo, W., Yan, G., et al. (2015). Analytical model and optimized design of power transmitting coil for inductively coupled endoscope robot. IEEE Transactions on Biomedical Engineering, 63(4), 694–706.
Ji, Z., Zhang, Z., Zhu, Q. (2019). An adjustable wireless power transfer design for capsule endoscopes. In 2019 IEEE 5th International Conference on Computer and Communications (ICCC) (pp. 933–937). IEEE.
Xin, W., Yan, G., & Wang, W. (2010). Study of a wireless power transmission system for an active capsule endoscope. The International Journal of Medical Robotics and Computer Assisted Surgery, 6(1), 113–122.
Peng, Y., Zhang, L., Li, Z., et al. (2022). Influences of wire diameters on output power in electromagnetic energy harvester. International Journal of Precision Engineering and Manufacturing-Green Technology, 1–12.
Acknowledgements
This research was funded by the National Natural Science Foundation of China (NSFC) (Grant Nos. 62103263; 81971767) and the Shanghai Science and Technology Support Project (Grant No. 19142203800), Science and Technology Innovation Bases of Shanghai (Grant No. 19DZ2255200), and the Natural Science Foundation of Shanghai (Grant No. 21ZR1429900).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Competing interests
The authors declare no competing interests.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Han, D., Yan, G., Wang, Z. et al. A Wireless Power Transfer System Based on a Hybrid Transmitting Coil for Targeted Therapy Microrobots in the Intestine. Int. J. Precis. Eng. Manuf. 24, 977–986 (2023). https://doi.org/10.1007/s12541-023-00805-8
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12541-023-00805-8