高炉炉墙测厚的信号处理

发布时间：2018-06-08 12:43

  本文选题：高炉 + 炉墙测厚　； 参考：《计算机测量与控制》2014年10期

【摘要】：超声波反射法应用于高炉炉墙测厚时,高炉内部环境高温高噪声的特点,造成超声回波信号被噪声湮没的问题;针对这一问题,研究了超声波在金属介质中传播的机理,分析了超声回波信号信噪比下降的原因以及实验数据时域和频域的特征,设计改进了高炉炉墙测厚的超声波发射电路和信号调理电路;采用加热炉模拟高炉200~1 000℃温度环境,对直径40mm、长度1.2m的铁棒进行测厚实验;经实测,改进的发射电路发射的超声信号强度增大,回波处理电路处理后超声回波信号信噪比明显提高、峰值清晰可辩,解决了噪声湮没回波信号的问题,提高了高炉炉墙测厚的测量精度,对高炉的高产、顺产和延长炉龄具有实际意义。
[Abstract]:When the ultrasonic reflection method is applied to the thickness measurement of blast furnace wall, the characteristics of high temperature and high noise in the inner environment of blast furnace cause the ultrasonic echo signal to be obliterated by noise, aiming at this problem, the mechanism of ultrasonic wave propagation in metal medium is studied. In this paper, the causes of the decrease of signal to noise ratio of ultrasonic echo signal and the characteristics of time domain and frequency domain of experimental data are analyzed, the ultrasonic emission circuit and signal conditioning circuit for thickness measurement of blast furnace wall are designed and improved, and the heating furnace is used to simulate the temperature environment of 2001000 鈩，

本文编号：1995831