一种改进的超声波液位测量声速校正方法  

An Improved Velocity Correction Method of Ultrasonic Liquid Level Measurement

作　　者：程晶晶[1] 孔力[1] 黄臻[1] 

机构地区：[1]华中科技大学控制科学与工程系,湖北武汉430074

出　　处：《武汉理工大学学报（信息与管理工程版）》2007年第2期40-43,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：国家自然科学基金资助项目(69874017)

摘　　要：针对液介式超声波液位测量的声速校正问题,在分析声速场重建问题的基础上,采用卡尔曼滤波方法预测未放置校正块区域的声速分布,实现了一种与测量量程无关的声速校正方式,有效地提高了液介式超声波液位测量仪器的一致性。实验表明,采用该方式在液介式超声波液位测量装置上实现了高精度液位测量,测量量程为1 500mm时绝对误差小于±1mm,解决了仪器一致性和测量精度之间的矛盾。To solve the velocity correction problem of ultrasonic liquid level measurement, an improved method is put forward in which Kalman filter is adopted to forecast the velocity distribution in the area without correcting block. The method is independent of measurement range so as to improve the coherence of ultrasonic liquid level measurement. The experimental result shows that the method achieves high precision in ultrasonic liquid level measurement and solves the contradiction of coherence and precision.

关 键 词：超声波 液位测量 声速校正 卡尔曼滤波 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]