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学科主题: 临床医学
题名:
A readout circuit for wireless passive LC sensors and its application for gastrointestinal monitoring
作者: 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
发表日期: 2014-08-01
DOI: 10.1088/0957-0233/25/8/085104
卷: 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
所属项目编号: 61372054 ; 2014CB744602 ; 2012AA040506 ; Z131101000413121 ; PIRSES-GA-2009-247641
项目资助者: 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
WOS记录号: WOS:000339273800023
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/66180
Appears in Collections:北京大学第二临床医学院_消化内科_期刊论文

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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

Recommended Citation:
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).
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