摘要
基于压电谐振原理,钛酸铋钠系无铅压电陶瓷可用于制作压电谐振式传感器探头,由于压电陶瓷各项性能随温度的变化,传感器难以适应复杂工作环境。该文对钛酸铋钠钾陶瓷谐振体在-10-100℃下进行阻抗频谱测量,分析获得不同温度下谐振频率的相对漂移量,对温度-频率（T-f）漂移关系进行回归分析,获得拟合函数。通过对5℃、-5℃实测值与拟合结果对比分析,发现二、三阶拟合误差较小,分别为0.054%、0.164%,0.054%、0.165%。综合评估,确定以二阶拟合方程作为矿用瓦斯传感器的谐振频率补偿算法,修正传感器在不同的温度环境下的测量误差。
Based on the theory of piezoelectric resonance, the sodium bismuth titanate series piezoelectric ceramics can be used in the production of piezoelectric resonant sensor probe. Due to the changes of piezoelectric ceramics performance with the temperature, the piezoelectric resonant sensor is difficult to adapt to the complex working en- vironment. In this paper, the T-f curves of syntony crystalloid about NKBT ceramic was measured at the tempera ture range of -10- 100 ℃, the change rule of relative drift of the resonant frequency under different temperature was analyzed,and the fitting functions were obtained. By analyzing the fitting results and the measured values eom- parativelyt at 5 ℃ and-5 ℃ points,it is found that the second and third order fitting error are smaller,they were 0. 054 % ,0.164 % ,0. 054 % ,0. 165 % respectively. The comprehensive assessment determined that the second-order fitting equation can be used as the resonance frequency compensation algorithm for the mine gas sensors to fix the sensor measurement error in different temperature environments.
出处
《压电与声光》
CAS
CSCD
北大核心
2016年第4期594-597,602,共5页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(51372197)
陕西省重点科技创新团队基金资助项目(2014KCT-04)
陕西省国际科技合作重点基金资助项目(2012KW-10)
关键词
无铅压电陶瓷
谐振
传感器
温度补偿
lead-free ceramic
resonance
senor
temperature compensation
