Solving Inverse Electromagnetic Sensing Problems Using Pareto Optimization

The most important criterion for an electromagnetic sensing coil is that the response it receives is unique for a particular type of object. This paper demonstrates that the Pareto optimization method, which can be used to ensure the maximum sensitivity of the sensing coil, can also be used to establish the uniqueness of the response. The technique is initially applied to the design of a simple coil system where the response is the change in coil impedance due to a buried pipeline. A coil design that achieves close to maximum response in both the resistive and inductive components is selected and the Pareto optimization is then also applied to the inverse problem.