基于一发多收线圈阵列的频域电磁法未爆弹探测技术

为了实现未爆弹目标的高效探测及定位，开发了一种小回线激励-阵列式线圈接收的主动电磁探测系统。采用偏心结构的收发线圈配置，实现了一次场的对消。通过接收线圈阵列排布，有效地提高了系统探测效率。提出了一种基于阵列线圈响应差分比较的未爆弹目标水平位置定位方法，并实验验证了可行性。研究结果表明，探测系统对于典型环状金属柱体的探测深度达到1 m,定位方法的计算值与真值误差在3.76 cm,实现了对未爆弹目标的准确探测和定位。

Frequency domain electromagnetic method based on the configuration of single transmitting and array receiving coils for unexploded ordnance detection

In order to realize the effective detection and localization of the unexploded ordnance, an electromagnetic detection system with small transmitting coil and array receiving coils has been developed. The primary field interference is removed by using the eccentric configuration between the transmitting coil and array receiving coils. Because of the array receiving coils, the detection efficiency of the system is effectively improved. The horizontal location algorithm based on differential comparison of the response of array receiving coils is proposed, and the feasibility is verified by experiments. The research results show that the detection depth of the detection system for the typical annular metal cylinder reaches 1 m, and the location error between the calculated value and the actual value is 3. 76 cm. The system and method are able to realize the accurate detection and location of the unexploded ordnance.