A novel algorithm for acoustic above ground marking based on function fitting |
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| Authors: | Yibo Li Dian Wang Liying Sun |
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| Affiliation: | 1. State Key Lab. of Precision Measuring Technology and Instrument, Tianjin University, Tianjin 300072, China;2. School of Control and Mechanical Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China |
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| Abstract: | Magnetic Flux Leakage detector (MFL_PIG) is widely used in long-range pipeline inspection. Acoustic above ground marking device is an important part of the location system in the MFL_PIG. A novel above ground marking algorithm based on function fitting is proposed to reduce marking error of above ground markers (AGMs). Experiments were carried out on a 2.5 km long pipeline on site. The results demonstrate that the function fitting algorithm has higher precision and anti-interference ability than traditional marking method-extreme value algorithm, and it works very well when SNR of the signal is greater than −2 dB. |
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| Keywords: | Pipeline inspection Above ground marking Function fitting algorithm |
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