An integrated computer vision system for real-time monitoring and control of long-fiber embedded hydrogel 3D printing
An integrated computer vision system for real-time monitoring and control of long-fiber embedded hydrogel 3D printing
复制标题
用于实时监测和控制长纤维嵌入水凝胶3D打印的集成计算机视觉系统
DOI：
10.1016/j.matpr.2022.09.272
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Webster-Wood, Victoria
中科院分区：
文献类型：
--
作者：
Sun, Wenhuan;Webster-Wood, Victoria
3D打印水凝胶组件已被广泛应用于组织工程和软生物混合机器人等领域。嵌入式打印方面的进展，例如悬浮水凝胶的自由形式可逆嵌入(FRESH)，使用逃逸的支撑浴进一步提高了3D打印水凝胶的几何保真度。最近，有研究表明，使用长纤维嵌入Fresh(LFE-Fresh)技术，将纤维嵌入和水凝胶3D打印相结合，可以显著增强通过嵌入式3D打印制造的水凝胶的结构刚性，从而使其应用范围更广。然而，由于纤维的高长细比，纤维在压缩载荷下容易屈曲，在埋入过程中保持纤维的稳定性对LFE-Fresh至关重要。在这项研究中，我们介绍了一种用于LFE-Fresh连续监测和控制的集成计算机视觉系统，该系统通过对视频数据中纤维变形的量化和对纤维挤出电机的控制，实时主动调整纤维的嵌入过程。通过样机验证，该系统有效地防止了纤维屈曲，纠正了LFE-FRESH过程中的过度挤压，提高了纤维的埋入质量。此外，这项技术是用低成本、大规模生产的组件实现的，可以方便地与现有的开源LFE-Fresh软件和硬件集成，这提高了它的可及性，并有助于未来适应新的研究应用。
3D printed hydrogel components have been used in a wide range of applications including tissue engineering and soft and biohybrid robotics. Advances in embedded printing, such as the Freeform Reversible Embedding of Suspended Hydrogels (FRESH), have further improved the geometric fidelity of 3D printed hydrogels using a fugitive support bath. Recently, it has been shown that the structural rigidity of hydrogels fabricated with embedded 3D printing can be significantly reinforced for a wider range of applications using the Long-fiber Embedded FRESH (LFE-FRESH) technique, an extension of FRESH by combing fiber embedding and hydrogel 3D printing. However, fibers are prone to buckling under compression load due to the high slenderness ratio and maintaining fiber stability during embedding is vital for LFE-FRESH. In this study, we introduce an integrated computer vision (CV) system for the continuous monitoring and control of LFE-FRESH, which actively adjusts the fiber embedding process in real-time by quantifying fiber deformation from the video data and controlling the fiber extrusion motor. Using the prototype, we demonstrated that the integrated CV system effectively prevents fiber buckling, corrects for over-extrusion during the LFE-FRESH process, and improves fiber embedding quality. Moreover, this technique was implemented with low-cost, mass-produced components and can be conveniently integrated with existing open-source LFE-FRESH software and hardware, which improves its accessibility and facilitates future adaptations for new research applications.
影响因子：
3.4
作者：
Sun W;Schaffer S;Dai K;Yao L;Feinberg A;Webster-Wood V
通讯作者：
Webster-Wood V
调整电化学排列的胶原线的机械和几何特性以适应生物混合机器人技术的应用。
DOI：
--
发表时间：
2021
期刊：
Journal of Biomechanical Engineering
影响因子：
--
作者：
Wenhuan Sun;Jason M. Paulovich;Victoria A. Webster
通讯作者：
Victoria A. Webster