With the advancement of deep learning and neural networks, the computational demands for applications in wearable devices have grown exponentially. However, wearable devices also have strict requirements for long battery life, low power consumption, and compact size. In this work, we propose a scalable optoelectronic computing system based on an integrated optical convolution acceleration core. This system enables high-precision computation at the speed of light, achieving 7-bit accuracy while maintaining extremely low power consumption. It also demonstrates peak throughput of 3.2 TOPS (tera operations per second) in parallel processing. We have successfully demonstrated image convolution and the typical application of an interactive first-person perspective gesture recognition application based on depth information. The system achieves a comparable recognition accuracy to traditional electronic computation in all blind tests.

可穿戴设备是能穿在身上, 实时获取人体或环境信息并进行传递和处理的功能设备, 在医疗健康、人工智能、运动娱乐等领域具有广阔的应用前景。随着可穿戴设备的发展, 各类柔性传感器应运而生。基于压电效应的柔性力学传感器因具有感应频率宽、响应快、线性好、自供电等优势而备受关注。然而传统的压电材料多为脆性陶瓷和晶体材料, 限制了其在柔性方面的应用。随着研究的深入, 越来越多的柔性压电材料和压电复合材料不断涌现, 给柔性可穿戴力学器件注入了新的发展活力。本文主要概括了柔性可穿戴压电器件的前沿进展, 包括压电原理、柔性压电材料的制备与性能提升方法。此外, 还详细总结了柔性可穿戴压电设备的主要应用方向, 包括医疗健康和人机交互, 以及遇到的挑战与机遇。

A miniaturized short-wavelength infrared spectrometer for use with diffuse light was created by combining a thin form factor carbon nanotube composite collimator, a linear variable filter, and an InGaAs photodiode array. The resulting spectrometer measures 3 mm × 4 mm × 14 mm and shows a significant improvement in resolution over a spectrometer without the collimator when used with diffuse light. Its small size and high throughput make it ideal for applications such as wearable optical sensing, where light from highly scattering tissue is measured. Plethysmographic measurements on the wrist were demonstrated, showing rapid data collection with diffuse light.

本文介绍了石墨烯材料的制备、石墨烯压力传感器的性能以及在可穿戴电子器件中的应用前景。总结了石墨烯材料的制备方法，阐述了石墨烯压力传感器在机械、导电性能、显示方面的优势。研究了在压力传感器的结构中加入石墨烯、石墨烯衍生物或石墨烯复合材料提高传感器性能的策略。介绍了石墨烯压力传感器在可穿戴电子器件中的应用，包括人体行为和健康检测、人机界面、电子皮肤以及可穿戴显示器方面的优秀性能和前景。

针对灵巧机器手的仿生触压感知功能，以光纤布拉格光栅作为信息传输和感知载体设计了可穿戴的触压感知指套。分别对指套的三种触压状态进行研究，选择触压位置1为垂直指尖，触压位置2为倾斜15°指尖，触压位置3为倾斜30°指腹。触压感知特性分析和实验研究表明，在0~10 N的触压力范围内，该感知指套具有较好的灵敏度和线性度，在位置1、位置2、位置3的平均灵敏度分别为24.119 6 pm/N、10.338 3 pm/N、-1.580 7 pm/N，线性度都在99%以上，该指套能分辨出手指不同触压位置以及加载力（载荷）的大小。为进一步验证指套仿生触压感知性能，进行硬度辨别感知实验，提出了标准触压波深比作为硬度感知的量化表征参数。该传感指套可以感知出四种硬度硅胶，具有很好的重复性，重复性误差分别为3.82%、0.97%、0.51%、0.29%，为灵巧机器手触压感知的深入研究提供参考。

Flexible and wearable humidity sensors play a vital role in daily point-of-care diagnosis and noncontact human-machine interactions. However, achieving a facile and high-speed fabrication approach to realizing flexible humidity sensors remains a challenge. In this work, a wearable capacitive-type Ga₂O₃/liquid metal-based humidity sensor is demonstrated by a one-step laser direct writing technique. Owing to the photothermal effect of laser, the Ga₂O₃-wrapped liquid metal particles can be selectively sintered and converted from insulative to conductive traces with a resistivity of 0.19 Ω·cm, while the untreated regions serve as active sensing layers in response to moisture changes. Under 95% relative humidity, the humidity sensor displays a highly stable performance along with rapid response and recover time. Utilizing these superior properties, the Ga₂O₃/liquid metal-based humidity sensor is able to monitor human respiration rate, as well as skin moisture of the palm under different physiological states for healthcare monitoring.

为了满足可穿戴设备对微显示器高稳定性、低工作电压的要求，本文设计了一种新型低压微显示电路及其工作时序，在一帧时间内完成晶体管阈值电压偏移的提取、储存、补偿与发光，在最大灰度下发光电流达1 017.1 nA。当阈值电压偏移量在-50~+50 mV之间时，传统微显示电路误差最大达+18.67 LSB，而所设计的微显示电路发光电流误差保持在-0.54~+0.70 LSB之间，显著提高了显示稳定性。所设计的微显示电路经HSPICE仿真验证功能正确，符合可穿戴设备的应用要求。