Metal Equivalent Measurement Based on Low-Frequency Electromagnetic Induction Method

In order to evaluate the detectability of landmine, a new method based on results of metal equivalent measurement is developed. A series of studies are carried out to evaluate the detectability of landmine academically and experimentally, from the aspect of the relation between detection method and induced signal, the impact of metal mass to induced signal, and landmine metal mass equivalent detection method. In addition, by analyzing the relationship between second field signal and metal mass using the principle of low-frequency electromagnetics, it is verified that in the same detection height and the same medium, mine detector´s answer output is directly proportional to the quality of metal. Thus a fitting formula of induction signal and detection height, metal mass is concluded. Experimental results prove that using the method of metal equivalent measurement to evaluate detectability of landmine is effective.