管道漏磁信号压缩技术

为解决在固有硬件条件下实现实时高速海量数据压缩这一问题，通过Huffman算法与小波变换相结合的方法，给出了对管道漏磁信息进行有损与无损相结合的压缩方式.根据信号的特征，通过对漏磁信号阈值的判断，得出健康信息与缺陷信息，并对缺陷数据使用Huffman算法进行低压缩比的无损压缩，而对健康数据以及噪声数据则以小波变换进行有损高压缩比的压缩.模拟测试结果表明，压缩后的数据还原后，能够较好地体现出原数据的信息，说明了Huffman算法与小波变换相结合的压缩算法能够较好地实现对管道漏磁数据的存储.

Compression technique of pipeline magnetic leakage signal

To realize the real-time,high-speed and massive data compression under the conditions of inherent hardware,a compression mode combining loss with non-loss for pipeline magnetic leakage detection information was given by adopting the method combining the Huffman algorithm with wavelet transform.According to the characteristics of the signals and the judgement of the magnetic leakage signal threshold,the indefective information can be selected from the defective information.On the one hand,the non-loss compre...