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无线传感器系统无需电池供电 - China Medical Device Manufacturer
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Wed, January 17th, 2018

2009年6月CMDM电子快讯 » 技术新知
无线传感器系统无需电池供电

By: Shana Leonard

德国Micropelt公司生产的无线传感器节点通过收集热电能供电。
当产品由电池供电时,必然会给用户带来更换电源或充电的不便。Micropelt GmbH公司 (www.micropelt.com) 开发出号称世界第一款热能供电的无线传感器系统,无需电池及插头,操作简便。

据业务开发部副总裁 Burkhard Habbe 介绍:“TE-Power Node无需任何电池或电缆线的无线传感装置,是第一款真正的自主型无电池器件,可以连续工作,且无需任何外部电源或维护。”

Micropelt公司作为薄膜热电领域的专业公司,利用基于专有可扩展微机电系统的微结构平台技术开发出TE-动力节点。这种传感器节点最多可配备公司的两个 MPG-D751 温差发电器,通过一点点收集低至3.5C的有效温差发挥功效。Habbe解释道:“我们的技术利用塞贝克效应,可以将温差发电器上温差所驱动的热通量转变为电能”。此项温差收集技术借助15C或更高的外部温差,可以为节点提供无需电池的可持续无限电源。Habbe说与电池相比,该系统也更环保。

根据应用要求,可在铝基板上固定一个或两个温差发电器,占用面积为60 27 mm。铝制散热器采用螺纹孔设计,便于配置各种散热片,它位于温差发电器的顶部,通过印刷电路板固定并绝缘,还具有插头插座模块。该产品还整合了公司经过改良的 TE-Power Plus dc-dc 转换器,旨在将收集温差形成的可变电压转变为类似电池的 2.4 V恒压。Habbe称,“即使是几百微瓦的持续电能也优于性能良好的电池组。”

无线传感器节点无需电池且利用热能工作,因此可集成于医疗设备中,用于监测诸如温度、温度突变、压力、电击和颤动等因素。此外,公司发现该器械还可作为非植入式监控设备用于患者,通过收集人体热量,实现人体机能的超低功耗无线感测。

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