基于纳米晶软磁合金的电感式应变计的研究  

Research on Inductance Strain-Gage Based on Nanocrystalline Soft Magnetic Alloy

作　　者：石延平[1] 范书华[2] 藏勇[2] 

机构地区：[1]淮海工学院机械系,江苏连云港222005 [2]中国矿业大学机电学院,江苏徐州221008

出　　处：《传感技术学报》2012年第7期963-967,共5页Chinese Journal of Sensors and Actuators

基　　金：江苏省海洋资源开发研究院科技开放基金项目(JSIMR09B07)

摘　　要：利用纳米晶软磁合金良好的压磁特性,设计了一种用于测量平面应力的电感式应变计。首先,介绍了这种应变计的结构和工作原理,并推导出其输出数学模型。其次,进行了可行性试验。试验表明,应变计每一测量轴的输出电压主要取决于该测量方向的应变,其灵敏度可达3.86 mV/με,线性度为1.03%F.S,重复误差与迟滞误差均小于1%F.S。在平面应力状态时,不同方向应变相互耦合对测量精度的影响,通过标定补偿灵敏度系数对应变计的输出加以修正。与传统的电阻式应变计相比,这种电感式应变计具有结构简单,工作可靠,使用寿命长,适应性强,灵敏度和测量精度较高等特点。A new strain-gage which can be used for measuring two-dimensional stress based on inductance principle was discussed,and it was made of nanocrystalline soft magnetic alloy.The principle and structure of the strain-gage were presented,and its output characteristic equation was derived.By making a measuring experiment,It is show that the output voltage in any gauging spindle of the strain-gage be decided by strain in same direction with gauging spindle,and its measuring sensitivity and linearity is respectively 3.86mV/με,1.03%F.S.When it was used to measure two-dimensional stress,the effect on measurement accuracy from mutual interaction in difference direction strain can be revised by demarcating a sensitivity compensation coefficient.Comparing with a resistance strain gauge,the inductance strain gage has some characteristic as simple structure,reliable performance,long life,strong adaptability,higher sensitivity and accuracy.

关 键 词：应变计 纳米晶软磁合金 压磁效应 电感原理 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]