Dead pixel automatic removing method applied to superconducting transient electromagnetism

Abstract

The invention discloses a dead pixel removing method applied to superconducting transient electromagnetism, which comprises the steps of S1, synchronously dividing an SQUID magnetometer output signal acquired by the superconducting transient electromagnetism into a plurality of periods according to a period parameter of an emission current, performing second-order difference on each period signal, extracting a maximum value and a minimum value from the signals after the second-order difference, taking an absolute value of a difference value of the maximum value and the minimum value as a dead pixel feature value of the signals in the period, and forming a dead pixel feature value set; S2, for the dead pixel feature value set, setting parameters to construct a Kmeans clustering model for clustering, and automatically finding out a deviation point in the defective pixel feature value set so as to lock the period of the dead pixel; and S3, performing proximity detection on the periods with the dead pixels so as to delete the periods with the dead pixels in pairs, and completing automatic pairwise removal of the dead pixels. According to the invention, automatic positioning of the dead pixels and periodic pairwise detection and deletion of the existing dead pixels can be realized.

Description

technical field [0001] The invention relates to the technical field of transient electromagnetic application in geophysics, in particular to an automatic dead point removal method applied to superconducting transient electromagnetic. Background technique [0002] With the sustained and rapid development of my country's economy, the demand for consumption of minerals and other resources has further expanded. Among them, iron ore, copper, bauxite and other resources that play an important role in economic development are far below the world average level, and there are still problems such as uneven distribution, small scale of ore deposits, and many lean ore and refractory ore. In order to get rid of this predicament, people have to develop advanced measuring instruments and turn to more complex exploration of deep mineral resources. The emergence of superconducting transient electromagnetics can make up for this defect. It emits bipolar pulse signals and receives underground...

AI Technical Summary

Problems solved by technology

However, in actual field experiments, SQUID is susceptible to interference from the environment and the system itself, and a certain number of dead pixels will appear in individual cycles, which seriously affects the positive and negative superposition effects and restricts the superconducting transient electromagnetic field. work performance, so dead pixel removal becomes an important step in transient electromagnetic signal processing

[0004] The current methods of removing bad points are mainly manual or fixed threshold-based algorithm removal, which has the disadvantages of slow efficiency and large errors, and cannot automatically and accurately eliminate bad points of different amplitudes. Therefore, in the actual transient electromagnetic signal processing limitations bigger

Images