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    • 10. 发明申请
    • SENSOR HAVING FERROGEL WITH MAGNETIC PARTICLES
    • 具有磁性颗粒的传感器
    • US20130245402A1
    • 2013-09-19
    • US13800860
    • 2013-03-13
    • Babak ZiaieRonald A. Siegel
    • Babak ZiaieRonald A. Siegel
    • A61B5/145
    • A61B5/14503A61B5/05A61B5/14532G01N27/72
    • A sensor for detecting a condition includes a hydrogel configured to change thickness or volume in response to the condition. Magnetic particles are arranged in the hydrogel so that a magnetic property of the hydrogel changes with changes of thickness or volume of the hydrogel. Some such sensors include a magnetic-field detector that measures the magnetic field of the hydrogel. Other such sensors include a device coil is arranged with respect to the hydrogel so that changes in the magnetic property modulate an electrical property of the sensor. A sensing system using such a sensor includes a reader spaced apart from the sensor and including a reader coil and a resonance detector coupled to the reader coil to detect a the resonant frequency of the sensor. Changes in the magnetic property detectably modulate the resonant frequency.
    • 用于检测状况的传感器包括水凝胶,其被配置成响应于该状况改变厚度或体积。 磁性颗粒被布置在水凝胶中,使得水凝胶的磁性能随着水凝胶的厚度或体积的变化而变化。 一些这样的传感器包括测量水凝胶磁场的磁场检测器。 其他这样的传感器包括相对于水凝胶布置的装置线圈,使得磁性能的变化调节传感器的电性能。 使用这种传感器的感测系统包括与传感器间隔开的读取器,并且包括读取器线圈和耦合到读取器线圈的谐振检测器,以检测传感器的谐振频率。 磁性能的改变可以侦测地调制谐振频率。