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相关概念视频

Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

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A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field...
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一个小型的无电池和无线生物潜能记录器,具有动态带宽和数据速率更新,用于功率优化.

Roshan Pathitharayil Mathews, Iman Habibagahi, Hamid Jafari Sharemi

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
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    本研究介绍了一个微型的无线生物潜能记录器,具有动态带宽和数据速率调整. 这种低功耗设备有效地捕获各种生物潜能信号,包括神经记录,以改善医疗监测.

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    科学领域:

    • 生物医学工程 生物医学工程
    • 可穿戴技术可穿戴技术
    • 信号处理 信号处理

    背景情况:

    • 生物潜能信号的带宽差异很大,需要适应性的记录系统.
    • 现有的生物潜能记录器往往缺乏对带宽和数据速率的动态调能力,这会影响效率.
    • 高效的功耗对于长期,可植入或可穿戴的监控设备至关重要.

    研究的目的:

    • 开发一个小型化的,低功耗的,无电池的,无线的生物潜能记录器,具有动态带宽和数据速率更新功能.
    • 通过适应不同生物潜能信号的变化带宽要求,实现高效运行.
    • 通过芯片验证和体内测量来验证拟议系统的性能.

    主要方法:

    • 为模拟前端带宽 (0.25-10 kHz) 和发射器数据速率 (10.5-420 kbps) 实施自动调整方法.
    • 芯片上的系统 (SoC) 的设计,其标称功耗为32μW,速度为21kbps.
    • 适应性调整传感带宽和数据速率用于多频段传感.
    • 芯片验证和体内动物心电图 (ECG) 测量.

    主要成果:

    • 从0.25 kHz到10 kHz的动态带宽调整.
    • 实现了从10.5 kbps到420 kbps的数据速率适应性.
    • 经验证的低功耗 (32μW在21kbps) 和有效的体内心电图记录.
    • 展示了多频段传感能力,用于随时间变化的感兴趣信号.

    结论:

    • 开发的生物潜能记录器为各种生物潜能信号采集提供了高效,适应性和低功耗的操作.
    • 带宽和数据速率的动态调整提高了能源效率,并使选择性神经信号捕获 (例如LFP和AP) 成为可能.
    • 该系统的适应性对于先进的神经记录应用程序至关重要,它可以在最低功耗的情况下进行高准确度数据捕获.