Smart rings have emerged as uniquely convenient devices for continuous physiological and behavioral sensing, offering unobtrusive, constant access to metrics such as heart rate, motion, and skin temperature. Yet most commercial solutions remain proprietary, hindering reproducibility and slowing innovation in wearable research. We introduce {\tau}-Ring, a commercial-ready platform that bridges this gap through: (i) accessible hardware combining time-synchronized multi-channel PPG, 6-axis IMU, temperature sensing, NFC, and on-board storage; (ii) adjustable firmware that lets researchers rapidly reconfigure sampling rates, power modes, and wireless protocols; and (iii) a fully open-source Android software suite that supports both real-time streaming and 8-hour offline logging. Together, these features enable out-of-the-box, reproducible acquisition of rich physiological and behavioral datasets, accelerating prototyping and standardizing experimentation. We validate the platform with demonstration studies in heart-rate monitoring and ring-based handwriting recognition. Source code is available at GitHub: https://github.com/thuhci/OpenRing.

翻译：智能戒指已成为持续监测生理与行为指标的独特便捷设备，能够无感、持续地获取心率、运动和皮肤温度等数据。然而，大多数商业解决方案仍为封闭系统，阻碍了可重复性并延缓了可穿戴研究领域的创新。我们推出τ-Ring这一商业化就绪的平台，通过以下方式弥合这一鸿沟：(i) 采用包含时间同步多通道光电容积描记(PPG)、六轴惯性测量单元(IMU)、温度传感、近场通信(NFC)及板载存储的易用硬件；(ii) 提供可调节固件，使研究人员能快速重配置采样率、功耗模式与无线协议；(iii) 配套完全开源的Android软件套件，支持实时流传输与8小时离线记录。这些特性共同实现了开箱即用、可重复的丰富生理与行为数据采集，加速了原型开发并标准化了实验流程。我们通过心率监测与基于戒指的手写识别示范研究验证了该平台。源代码发布于GitHub：https://github.com/thuhci/OpenRing。