Research on On-line detection system for natural gas pipeline

Four methods for testing the thickness and defect of pipeline are compared and analyzed in this paper. The testing principle of magnetic leakage flux based on electromagnetism is discussed in detail. From the experiments of sensor character, the effects caused by some factors are found, which give some important information for sensor design, and this method is proved reasonable and effective. The mechanical and electrical structures of inspection equipment, as well as its working principle and technical features are introduced. In this paper, control flow and software design are discussed, too. This detection system has been successfully developed. Experiments show that this detection system has high resolution and can be put into practice.