基于铁磁性液体的微差压传感器研究  

Study on Micro Differential Pressure Sensor Based on Ferrofluid

作　　者：董国强[1] 李德才[1] 郝瑞参[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《传感技术学报》2009年第1期50-53,共4页Chinese Journal of Sensors and Actuators

基　　金：北京市自然科学基金资助(4062028)

摘　　要：差压是一种重要的力学参数,为了提高差压的测量精度,应用新型纳米材料——磁性液体设计了一种微差压传感器,建立了传感器的理论模型并对其输入输出关系进行了理论推导。该传感器采用螺线管式差动变压器的工作原理,其核心部分是可变互感,利用磁性液体兼具磁性和流动性的特点实现微差压的测量。实验表明,该种磁性液体微差压传感器具有工作压力范围大、线性度好、灵敏度高、稳定可靠等优点,可以广泛应用于工业过程控制、机械制造、生物医学工程等许多领域。Differential pressure is an important mechanical parameter. In order to improve the measurement accuracy, a micro differential pressure sensor was designed by using a new nanomaterial-ferrofluid. A theoretical model was estabilished, and the input-output relationship of the sensor was derived. The sensor adopts the principle of the solenoid differential transformer. , the core of which is the variable mutual inductance, and it achieves the measurement by using both the magnetism and fluidity of the ferrofluid. Experiments showed that the sensor possesses the features of wide pressure range, good linearity, high sensitivity and stability, which can be widely applied to industrial process control, machinery manufacture, biomedical engineering etc.

关 键 词：传感器 微差压 磁性液体 线性度 灵敏度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]