Abstract
For unexploded O=ordnance (UXO) detection, individual technology cannot achieve the best detection performance. The new detection mode of joint magnetic and electromagnetic method has attracted more and more attention. In this paper, a newly developed joint detection system is introduced, a multi-rotor UAV-based magnetic system (UAVMAG) and a cart-based time-domain electromagnetic detection system (TDEM-Cart) are combined, and the cooperative processing of magnetic field and electromagnetic data is proposed. The result of the joint inversion fuses the feature vector retrieved from the magnetic field data and the feature vector inverted from the electromagnetic data, providing more accurate positioning results and richer information, which is favorable to locate and distinguish the UXO. Two field experiments are conducted, and the results show that when the joint system works in the full-coverage survey mode, both ferromagnetic and non-ferromagnetic metal targets can be detected, avoiding missed detections. In addition, when the joint system works in the cued survey mode, the detection efficiency is improved, the positioning accuracy of joint interpretation is less than 10 cm, and it shows satisfactory performance in the recognition of targets.
Highlights
Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science and Technology University, Beijing 100101, China
We have conducted two field tests to evaluate the performance of the joint detection system, and performed the cooperative inversion of the magnetic and electromagnetic data
When the joint detection system works in the cued survey mode, the rapid and complete scanning detection is firstly conducted by the UAV-based magnetic system (UAVMAG), and potential abnormal regions are delineated according to the result of magnetic survey
Summary
Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science and Technology University, Beijing 100101, China. Information Science Academy, China Electronics Technology Group Corporation, Beijing 100086, China; Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China; Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Abstract: For unexploded O=ordnance (UXO) detection, individual technology cannot achieve the best detection performance. The new detection mode of joint magnetic and electromagnetic method has attracted more and more attention. The result of the joint inversion fuses the feature vector retrieved from the magnetic field data and the feature vector inverted from the electromagnetic data, providing more accurate positioning results and richer information, which is favorable to locate and distinguish the UXO. Two field experiments are conducted, and the results show that when the joint system works in the full-coverage survey mode, both ferromagnetic and non-ferromagnetic metal targets can be detected, avoiding missed detections. Various types of scalar or vector magnetic field sensors are fixed on different carrier platforms, forming the handheld [11,12], published maps and institutional affiliations
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