电阻抗测量法检测微生物的电路设计  

Circuit Design for Detecting Microbe with Electrical Impedance Measuring Method

作　　者：吴义尚[1] 李旭宇[1] 贺尚红[1] 汪颋[1] 

机构地区：[1]长沙理工大学汽车与机械工程学院,湖南长沙410114

出　　处：《自动化仪表》2010年第1期52-55,共4页Process Automation Instrumentation

摘　　要：为了检测血液中是否存在致病的微生物,根据电阻抗测量法原理,设计了一种检测微生物的压电微生物传感器电路。在分析了电路原理的基础上,推导出电路振荡频率与溶液介电常数的关系式,并结合实验数据,使用PSpice软件进行了仿真实验。仿真结果表明,压电微生物传感器电路可以应用于食品微生物快速检测、血液细菌培养中细菌检测以及溶液浓度检测等领域。In order to detect whether pathogenic microbes exist in blood or not, in accordance with the principle of electrical impedance measurement in fast speed detecting microbes, the circuit of piezoelectric biosensor for detecting microbes is designed. On the basis of analyzing the principle of the circuit, the relational formula between oscillation frequency and dielectric constant is derived, combining with the experimental data and by using PSpice software, the simulation experiments are carried out. The simulation result shows that the sensing circuit can be used in rapid detection of microbes in foods, bacterial detection in blood culture, as well as concentration of solutions, etc.

关 键 词：电阻抗 压电生物传感器 晶体振荡器 检测 仿真 

分 类 号：TN752.2[电子电信—电路与系统]