敏感工作气体对射流陀螺灵敏度的影响  

Effect of Sensitive Working Gas on the Sensitivity of the Fluidic Gyroscope

作　　者：朴林华[1] 崔雪梅[2] 董浩亮[1] 赵京京[1] 秦艺[1] 谭家成[1] 

机构地区：[1]北京信息科技大学北京市传感器重点实验室,北京100101 [2]延边大学师范学院,吉林延吉133002

出　　处：《压电与声光》2015年第5期826-829,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(60772012);北京市教委科技面上基金资助项目(KM201110772020);北京市自然科学基金重点项目&北京市教委科技计划重点基金资助项目(KZ201511232034);新世纪优秀人才支持计划(NCET)基金资助项目;北京市重点实验室开放课题基金资助项目;北京市新世纪百千万人才工程培养基金资助项目;现代测控技术教育部重点实验室基金资助项目;北京信息科技大学大学生科技创新计划基金资助项目;北京信息科技大学研究生科技创新基金资助项目

摘　　要：研究了干燥空气、N2和He等3种常用敏感工作气体对射流陀螺灵敏度的影响。采用有限元法计算了输入角速度ωi=20(°)/s时敏感元件内的流场。计算结果和实验表明,改变敏感元件内敏感工作气体的种类,流场分布也随之变化。ωi=20(°)/s时,两热电阻丝r1、r2处的气流速度差ΔvN2>ΔvAIR>ΔvHe。灵敏度系数KN2>KAIR>KHe,其中KN2=1.05 KAIR,KHe=0.21%KAIR。N2对应的灵敏度最高,热电阻丝抗氧化,稳定性较好,但成本高;干燥空气的灵敏度次之,热电阻丝易氧化,稳定性差;He对应的灵敏度最小,热电阻丝不易氧化,稳定性最好。该文解释了敏感工作气体对射流陀螺灵敏度的影响机理,为提高射流陀螺的实用性,满足不同工程需要开辟了一个新的途径。The effects of three kinds of commonly used sensitive gases of dry air,nitrogen（N2）and helium（He）on the sensitivity of the fluidic gyroscope have been studied in this work.By using the finite element method,the flow field in the sensing element of fluidic gyroscope under the effect of the input angular velocity（ωi）of 20（°）/s was calculated The calculated results and experiment have shown that the distribution of flow field changes by changing the type of sensitive working gas in the fluidic gyroscope sensitive element.The input angular velocity（ωi）is 20（°）/s,the airflow velocity difference between two heat resistance wire r1 and r2namelyΔvN2ΔvAIRΔvHe.the sensitivity coefficient KN2KAIRKHe,among them,KN2 is 1.05 times of KAIR,KHe,is 0.21%of KAIR.Nitrogen is corresponding to the highest sensitivity,the thermal resistance wires antioxidant,stability is better,but the cost is high;sensitivity of dry air secondly,the thermal resistance wires easily oxidized,poor stability;helium corresponding to the minimum sensitivity,thermal resistance wire is not easy to be oxidized,the best stability.This paper explained the mechanism of sensitive working gas influence on fluidic gyroscope sensitivity,and a new way was opened up for improving the practicability of the fluidic gyroscope to meet different engineering needs.

关 键 词：工作气体 射流 灵敏度 陀螺 对流场 有限元法 

分 类 号：TN37[电子电信—物理电子学]