Abstract
This paper introduces the physical model of unexploded ordnance (UXO) in the magnetization process and the formula derivation of the magnetic dipole model. The application of magnetometers and electromagnetic induction sensors in the detection of UXO is introduced. The magnetometers introduce the total field measurements technology of the CS optical-pump marine magnetometer and the MagSTAR (Magnetic Scalar Triangulation and Ranging) gradient detection technology. The electromagnetic induction sensors introduce the working theories and the popular product models of Geophex company and Geonics Ltd. The method of detecting UXO by MTADS of United States Naval Research Laboratory (The multisensor towed array detection system) compares the difference between the United States Naval Research Laboratory for target recognition.
Highlights
Unexploded ordnance (UXO) mainly refers to the fault bombs left over from the war and the mines left by the minefield [1]
According to the International Campaign to Ban Landmines (ICBL), more than 80 countries and regions in the world are affected by landmines and UXOs to varying degrees
This paper mainly introduces the basic model of UXO and two methods commonly used for UXO detection (Magnetic and Electromagnetic methods), I hope to help relevant workers in foreign countries
Summary
Unexploded ordnance (UXO) mainly refers to the fault bombs left over from the war and the mines left by the minefield [1]. From the 1970s to the 1990s, about 1.3 million landmines and more than 480,000 kinds of explosives were planted in the Yunnan section of the Sino-Vietnamese border, forming 161 chaotic minefields with an area of about 289 square kilometers. The area of the minefield is about 76.3 square kilometers, and there are about 157,000 explosives such as unexploded grenades and shells These UXO seriously affect the normal life of local villagers. When the target detection distance is greater than 2.5 times the magnetic target length, the magnetization target can be regarded as a magnetic dipole Under this condition, the magnetic anomaly field B(r, m) (unit N/A∙m) from the magnetization target r can be obtained by the equation (3).
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