基于有限元仿真的微针裁剪过程研究

doi:10.3969/j.issn.0258-8021.2025.02.006

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Abstract In the process of implanting high-density array micro probes into brain tissue, due to the large tip coverage area, the microprobes at corresponding positions in the array need to be cropped to avoid puncture of large blood vessels during implantation, while ensuring that the rest of microprobes are not affected. To determine the best point of the placement and pushing speed of the cropping device, the cropping process was studied by combining experiment and finite element simulation. Firstly, a three-point bending experiment was designed and the mechanical parameters of microprobes needed for simulation calculation were obtained. Secondly, based on the experimental results, a simplified model of array microprobes and cropping device was established in the simulation software Abaqus 2021, and the influence of the placement position, movement speed and alignment deviation of the cropping device on the cropping effect were explored. Finally, the simulation optimized parameters are used to carry out the microprobes cropping experiment. The results showed that the optimal distance between cropping device and the root of the microprobes was 1 mm, and the cropping speed was 7.5 mm/s. The actual success rate of microprobes cropping using this parameter reached 97.9%, and the cropping operation did not affect the other microprobes in the array. The results of this study provided strong support for the subsequent design of the structure and motion parameters of different type high-density microprobes array cropping device.

Key words： micro probes cropping device finite element three-point bending

Received: 09 July 2024

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R318

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	Articles by authors
	Tan Xinyue
	Ni Changmao
	Cheng Linyuan
	Yang Dengfei
	Tong Bei
	Huang Yuzhao
	Huang Li

Cite this article:

Tan Xinyue,Ni Changmao,Cheng Linyuan, et al. Cropping Process Study of Micro Probes Based on Finite Element Simulation[J]. Chinese Journal of Biomedical Engineering, 2025, 44(2): 183-192.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2025.02.006 OR http://cjbme.csbme.org/EN/Y2025/V44/I2/183

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