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A readout circuit for wireless passive LC sensors and its application for gastrointestinal monitoring
Bao, Kaikai1,2; Chen, Deyong1; Shi, Qiang1,2; Liu, Lijuan1,2; Chen, Jian1; Li, Jing3; Wang, Junbo1
关键词readout circuit wireless passive LC sensor differential circuit gastrointestinal pressure monitoring
刊名MEASUREMENT SCIENCE & TECHNOLOGY
2014-08-01
DOI10.1088/0957-0233/25/8/085104
25期:8
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Engineering, Multidisciplinary ; Instruments & Instrumentation
研究领域[WOS]Engineering ; Instruments & Instrumentation
关键词[WOS]PRESSURE SENSOR
英文摘要

A readout circuit is presented for wireless passive LC sensors, where an inductor-capacitor (LC) resonant circuit was combined with a readout coil for resonant frequency detection. The impedance phase of the readout coil shows a ′dip′ near the sensor′s resonant frequency due to the mutual inductance. Previously, the phase-dip has suffered from limited amplitude in the low-coupling-coefficient condition (especially in the case of implantation), rendering portable detection troublesome. To address this issue, in this study a new differential transduction circuit was proposed where both theoretical analysis and numerical simulations were performed. Compared to conventional transduction circuits (e.g., the I-V circuit and the auto-balancing bridge circuit), the differential circuit was more sensitive to the phase change, enabling more reliable and precise resonant frequency detection. Moreover, the proposed readout circuit was used to detect the gastrointestinal pressure of rabbits with a empty set10 mm x 14 mm LC pressure sensor at an operational distance of up to 60 mm between the LC sensor and the readout circuit. Experimental results recorded a measurement resolution lower than 0.4 kPa and a measurement speed of eight times per second.

语种英语
WOS记录号WOS:000339273800023
项目编号61372054 ; 2014CB744602 ; 2012AA040506 ; Z131101000413121 ; PIRSES-GA-2009-247641
资助机构NSFC (National Natural Science Foundation of China) ; National Basic Research Program of China (973 Program) ; National High Technology Research and Development Program of China (the 863 Program) ; Beijing Nova Program ; FP7
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/66180
专题北京大学第二临床医学院_消化科
作者单位1.Chinese Acad Sci, Inst Elect, State Key Lab Transducer Technol, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Inst Informat, Beijing, Peoples R China
3.Peking Univ Peoples Hosp, Dept Gastroenterol, Beijing, Peoples R China
推荐引用方式
GB/T 7714
Bao, Kaikai,Chen, Deyong,Shi, Qiang,et al. A readout circuit for wireless passive LC sensors and its application for gastrointestinal monitoring[J]. MEASUREMENT SCIENCE & TECHNOLOGY,2014,25(8).
APA Bao, Kaikai.,Chen, Deyong.,Shi, Qiang.,Liu, Lijuan.,Chen, Jian.,...&Wang, Junbo.(2014).A readout circuit for wireless passive LC sensors and its application for gastrointestinal monitoring.MEASUREMENT SCIENCE & TECHNOLOGY,25(8).
MLA Bao, Kaikai,et al."A readout circuit for wireless passive LC sensors and its application for gastrointestinal monitoring".MEASUREMENT SCIENCE & TECHNOLOGY 25.8(2014).
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