AI 中文总结
研究旨在解决可穿戴超声设备的功耗和功能限制问题，提出WULPUS PRO平台，集成多种功能，支持多模式超声采集，在模拟实验中实现B模式成像，具备低功耗、高分辨率特点，还支持无线传输，建立了新的可穿戴超声平台类别。
AI 中文摘要
可穿戴超声能够持续监测肌肉动态、膀胱容量和心血管活动等生理过程。现有的全可穿戴超低功耗平台仅限于浅部、低通道A模式传感，而更大的多模式系统对于真正的可穿戴性来说过于笨重且功耗大。我们展示了WULPUS PRO，这是一个运行时可编程的可穿戴超声采集平台，尺寸为39×21×6毫米，重5克。它集成了30V激励、16个时分复用通道、具有高达70dB增益、9.9MHz带宽、时间增益补偿和32dB SNR的低噪声接收前端。该平台在RF采样模式下支持高达2.2MHz的深部组织回波采集，在包络检测模式下支持8MHz。我们在模拟实验中展示了16通道超低功耗可穿戴设备中的B模式成像，轴向分辨率亚毫米，横向分辨率毫米级，在50Hz PRF时功耗40mW，在300Hz PRF时低于60mW。WULPUS PRO支持压电和电容微机械超声换能器，可与基于聚合物的皮肤贴合式CMUT阵列集成。作为与主机无关的采集前端，它为基于BLE和Wi-Fi的可穿戴主机提供标准数据和电源接口。我们展示了与外部BLE和Wi-Fi模块的无线传输，并预测使用300mAh、6.4g的锂聚合物电池，在50Hz PRF时BLE运行1 - 2天，在300Hz PRF时Wi-Fi流传输超过3小时。WULPUS PRO建立了一类全新的完全可编程、支持B模式的超低功耗可穿戴超声平台。
英文摘要
Wearable ultrasound enables continuous monitoring of physiological processes such as muscle dynamics, bladder volume, and cardiovascular activity. Existing fully wearable ultra-low-power platforms are limited to shallow, low-channel A-mode sensing, while larger multi-mode systems are too bulky and power-hungry for true wearability. We present WULPUS PRO, a runtime-programmable wearable ultrasound acquisition platform measuring $39\times21\times6 \mathrm{mm}$ and weighing $5 \mathrm{g}$. It integrates $30 \mathrm{V}$ excitation, 16 time-multiplexed channels, a low-noise receive front-end with up to $70 \mathrm{dB}$ gain, $9.9 \mathrm{MHz}$ bandwidth, time-gain compensation, and $32 \mathrm{dB}$ SNR. The platform supports deep-tissue echo acquisition up to $2.2 \mathrm{MHz}$ in RF-sampling mode and $8 \mathrm{MHz}$ in envelope-detection mode. We demonstrate B-mode imaging in a 16-channel ultra-low-power wearable with sub-millimeter axial and millimeter-scale lateral resolution in phantom experiments, while consuming $40 \mathrm{mW}$ at $50 \mathrm{Hz}$ PRF and under $60 \mathrm{mW}$ at $300 \mathrm{Hz}$ PRF. WULPUS PRO supports both piezoelectric and capacitive micromachined ultrasonic transducers, enabling integration with skin-conformal polymer-based CMUT arrays. As a host-agnostic acquisition front-end, it exposes standard data and power interfaces for BLE- and Wi-Fi-based wearable hosts. We demonstrate wireless transmission with external BLE and Wi-Fi modules and project 1-2 days of BLE operation at $50 \mathrm{Hz}$ PRF and over 3 h of Wi-Fi streaming at $300 \mathrm{Hz}$ PRF using a $300 \mathrm{mAh}$, $6.4 \mathrm{g}$ Li-Po cell. WULPUS PRO establishes a new class of fully programmable, B-mode-enabled, ultra-low-power wearable ultrasound platforms.
Comments16 pages, 13 figures
