Jiang Mengqi, Jin Chun, Bai Ziqian
School of System Design and Intelligent Manufacturing, Southern University of Science and Technology, Taoyuan, Shenzhen, 518000 Guangdong, China.
ACS Sens. 2025 Jan 24;10(1):448-459. doi: 10.1021/acssensors.4c02734. Epub 2024 Dec 18.
Bending sensors are critical to the advancement of wearable electronics and can be applied in the dynamic monitoring of flexible object morphology. However, current bending sensors are constrained by sensing range and precision, especially in full-range detection. The maximum sensing range of existing flexible bending sensors is 0-240°. This study introduces a bianisotropic responsive structure into the design of an all-textile bending sensor, thereby realizing 0-360° full-range omnidirectional bending sensing. First, the project elucidated the sensing mechanism of the piezoresistive bianisotropic structured bending sensor and identified critical factors through a numerical simulation method. Then, the bianisotropic structured bending sensors were produced through the stitch method and analyzed on their electromechanical performance. Further, the recognition model for both bending angle and direction parameters was developed via numerical calculation, achieving a high accuracy with an error rate of 2.82%. Last, according to the ergonomics of body joints, the sensors were customized and validated in body joint monitoring scenarios. This work significantly enhances the performance of flexible bending sensors in sensing range, accuracy, and comfort for the wearer. The versatility of this bending sensor positions it as a promising candidate to supplant traditional heavy equipment or rigid devices, particularly in wearable joint motion monitoring and soft robotics.
弯曲传感器对于可穿戴电子产品的发展至关重要，可应用于柔性物体形态的动态监测。然而，当前的弯曲传感器受到传感范围和精度的限制，尤其是在全范围检测方面。现有柔性弯曲传感器的最大传感范围为0-240°。本研究将双各向异性响应结构引入全纺织弯曲传感器的设计中，从而实现了0-360°全范围全向弯曲传感。首先，该项目阐明了压阻双各向异性结构弯曲传感器的传感机制，并通过数值模拟方法确定了关键因素。然后，通过缝合方法制作了双各向异性结构弯曲传感器，并对其机电性能进行了分析。此外，通过数值计算建立了弯曲角度和方向参数的识别模型，实现了2.82%的低错误率，精度较高。最后，根据人体关节的人体工程学原理，定制了传感器并在人体关节监测场景中进行了验证。这项工作显著提高了柔性弯曲传感器在传感范围、精度和佩戴舒适度方面的性能。这种弯曲传感器的多功能性使其成为取代传统重型设备或刚性装置的有前途的候选者，特别是在可穿戴关节运动监测和软机器人领域。
