新型超声波氧气浓度计  

New Ultrasonic Oxygen Concentration Meter

作　　者：张红丽[1] 和卫星[1] 郁永斌[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《仪表技术与传感器》2014年第1期41-43,共3页Instrument Technique and Sensor

摘　　要：研制的浓度计基于最小二乘曲面拟合的方法通过标定氧气浓度与超声波传播时间和气体温度之间的函数关系计算氧气浓度。通过对元器件选型、电路设计、标定方法等关键技术的研究实现了实验样机,并对其进行测试。测试结果表明,基于曲面拟合的超声波法检测氧气浓度是可行的,信号稳定性和重复性良好,测试时间短,并且其检测误差小于2.0%。A new ultrasonic oxygen density monitor was introduced,which calculate oxygen concentration by calibrating function relation between oxygen concentration and the ultrasonic propagation time and gas temperature based on least squares surface fitting method.Based on the key technology of component choice,circuit design and calibration method was studied,the prototype was designed and tested.The results show that using ultrasonic method based on surface fitting detect oxygen concentration is feasible,signal stability and good repeatability,short test time,and the detection error is less than 2.0％.

关 键 词：氧气浓度 超声波 曲面拟合 

分 类 号：TB517[理学—物理]