Fast characterization for UXO-like targets with a portable transient electromagnetic system. (15th February 2022)

• Record Type: Journal Article
• Authors: Wang, Lijie; Zhang, Shuang; Chen, Shudong; Jiang, Hejun
• Is Part Of: Measurement. Volume 189(2022)
• Publication Date: 2022-02-15
• Subjects: Transient electromagnetic -- Unexploded ordnance -- Differential evolution algorithm -- Target characterization; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2021.110492
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: A three-position measurement method to quickly characterize the target is proposed. A single point to quickly locate the target based on DE algorithm is proposed. The time-consumption of the proposed method is about 11% of the traditional one. Abstract: When detecting an underground target with a portable transient electromagnetic system, the system excites and records digitized data on a 5 × 5 or 7 × 7 grid above the target, and with the positioning system to accurately record the sensor positions, which makes the detection more complex and less efficient. To simplify the detection process, a novel three-position measurement method without positioning system is proposed to estimate the target characteristics. First, a new forward model based on the relative position is established, and the relative position is estimated by differential evolution algorithm at each measurement. Then, the proposed method is optimized to quickly and precisely characterize the target. Results show that the horizontal and depth errors are less than 5 and 9 cm, respectively. The proposed method takes about 28.4 s to characterize the target, only 11% of the traditional one, which substantially improves the detection efficiency and flexibility of the portable sensor.