An autonomous bladder pressure monitoring system

被引：50

作者：

Coosemans, J ^{[1
]}

Puers, R ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept ESAT MICAS, B-3001 Louvain, Belgium

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2005年 / 123-24卷

关键词：

pressure sensor; inductive powering; telemetry;

D O I：

10.1016/j.sna.2005.03.040

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

This paper reports on the development of an autonomous monitoring system, capable of continuously measuring the pressure inside the bladder. The capsule features wireless bi-directional communication and can be inductively powered anywhere inside the bladder. Short-circuiting the resonant LC tank for the data transmission maximizes the operating range of the passive telemetry. A novel clock extraction method is presented, based on lock-in of a Schmitt-trigger oscillator into the external radio-frequency field. A prototype was built using only discrete components. The system measures the pressure with a resolution of 0.04kPa at a sampling rate of 10 Hz. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：155 / 161

页数：7

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