A printed wireless fluidic pressure sensor
A printed wireless fluidic pressure sensor
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DOI：
10.1088/2058-8585/aae09e
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发表时间：
2018-09-01
影响因子：
3.1
通讯作者：
Ng, Tse Nga
中科院分区：
文献类型：
--
作者：
Zhai, Yichen;Lee, Jiyeon;Ng, Tse Nga
一种喷墨印刷电感电容（LC）谐振器被证明用于在水环境中的压力的无线监测。感测机制基于可压缩电容器，该电容器根据所施加的压力来调制LC电路谐振频率。改进了迹线导电性和电感器的几何设计，以增加传感器和读出线圈之间的互感耦合。电容传感器中的介电孔隙率被调谐以增强压力灵敏度。封装的传感器显示出相对于大气压力在30和170 mmHg（4-23 kPa）之间的压力的线性响应和3 mmHg的分辨率。传感器的时间响应高达6 Hz，能够捕获典型的心脏脉搏波形作为概念验证演示。
An inkjet-printed inductor-capacitor (LC) resonator is demonstrated for wireless monitoring of pressure in aqueous environments. The sensing mechanism is based on a compressible capacitor that modulates the LC circuit resonant frequency depending on the applied pressure. The trace conductivity and geometric designs of inductors are improved to increase mutual inductive coupling between the sensor and the readout coil. The dielectric porosity in the capacitive sensors are tuned to enhance pressure sensitivity. The encapsulated sensor showed a linear response to pressure between 30 and 170 mmHg (4-23 kPa) with respect to atmospheric pressure and a resolution of 3 mmHg. The sensor temporal response is up to 6 Hz and capable of capturing typical heart-pulse waveforms as a proof-of-concept demonstration.