Submarine pipeline tracing technology based on PNI array

Marine geomagnetic survey is an effective way for detecting and tracing submarine pipeline. The device is based on chip-level magnetic sensors, which is designed and tested independently. The relative azimuth of submarine pipeline related to the device has been analyzed, and algorithm for identifying the azimuth of a submarine pipeline has been proposed. The validity of the algorithm is verified in tests. In ocean engineering, it provides a technical foundation and test for submarine pipeline tracing.