Noise cancellation of flaw signal for seabed oil pipeline ultrasonic testing based on wavelet analysis 基于小波分析的海底石油管道缺陷超声检测信号去噪处理
The applications of wavelets analyses in the ultrasonic testing signal become a very promising development route 小波分析在超声检测信号中的应用成为一个很有前途的发展方向。
Abstract : the basic ways of wavelet analysis and it ' s application in rock ultrasonic testing were introduced 文摘:主要介绍了小波分析的基本方法及其在岩石超声检测信号分析中的应用
Abstract : a novel computational model of 3 - d flatness is developed , and a new model of flatness detection signal is explored 文摘:本文建立了三维板形计算模型和包括系统噪声的板形检测信号模型。
It is normally installed onto handling equipment or duct sections in accordance with endorser ' s requirement 物料探测器可按照用户需要，安装于设备或管道中，控制系统可根据物料探测器的检测信号得知。
Cinematography - audio head tones for use in international exchange of 35 mm analogue magnetic film masters - specifications and location 电影.用于国际素材交换的35mm模拟磁片带头检测信号.规范和位置
Because of the disturbance of environment and apparatus , the detected signal is very faint and the detection is very difficult 由于检测信号非常微弱，极易受到外界环境和器件本身的干扰，所以测量困难。
A two - stage adaptive noise cancellation algorithm for ultrasonic nondestructive testing of oil pipeline is studied in this paper 摘要针对石油管道缺陷超声检测信号的噪声消除问题，研究了一种两级自适应噪声消除算法。
Afterwards , the signal injecting power source and the partial hardware circuit of signal detection are designed and analyzed in detail 然后，设计了注入信号的功率源和检测信号部分的硬件电路，并对其进行了详细的分析。
Normalization method of ultrasonic testing signal , the advantages and disadvantages of time domain , frequency domain were discussed 探讨了超声波检测信号归一化处理的方法，以及时域信号归一化和频域信号归一化的优缺点。
