Development of a Distributed Stretchable 3-axis Sensing System

在2022财年，我们改进了可伸缩三轴皮肤传感器的性能，将前一版本中使用的银浆和弯曲图案替换为盘状铜线。我们的研究结果表明，这一改进使传感器的最大伸长率从150%显著提高到250%。此外，即使在数百次拉伸循环后，导线的电阻也没有显著变化，从而实现了稳定的I2C数字通信。然而，我们也观察到，缠绕的铜线在大约200次拉伸循环后容易断裂。基于这些发现，我们确定了需要专注于提高传感器的健壮性，这仍然是一个重大的挑战。这些结果在SI2022会议上公布。

In FY2022, we improved the performance of a stretchable 3-axis skin sensor by replacing the silver pastes and meander patterns used in the previous version with coiled copper wires.Our findings showed that this modification resulted in a significant increase in the maximum stretching ratio of the sensor from 150% to 250%. Furthermore, the resistance of the wires did not change significantly even after several hundred stretching cycles, allowing for stable I2C digital communication. However, we also observed that the coiled copper wires were prone to breakage after around 200 stretching cycles. Based on these findings, we identified the need to focus on improving the robustness of the sensor, which remains a significant challenge.These results were presented at the SI2022 Conference.