摘要
The present communication reports a new technique for the contactless measurement of the specific electrical conductivity of a solid conductor or an electrically conducting fluid.We term the technique 'Lorentz Force Sigmometry' where the neologism 'Sigmometry' is derived fiom the Greek letter sigma,often used to denote the electrical conductivity.Lorentz force sigmometry(abbreviated LoFoS)is based on similar principles as the traditional eddy current testing but allows a larger penetration depth and is less sensitive to variations in the distance between the sensor and the sample.Here we formulate the theory of LoFoS and numerically compute the calibration function which is necessary for determining the unknown electrical conductivity from the measurement of a Lorentz force.
The present communication reports a new technique for the contactless measurement of the specific electrical conductivity of a solid conductor or an electrically conducting fluid.We term the technique 'Lorentz Force Sigmometry' where the neologism 'Sigmometry' is derived fiom the Greek letter sigma,often used to denote the electrical conductivity.Lorentz force sigmometry(abbreviated LoFoS)is based on similar principles as the traditional eddy current testing but allows a larger penetration depth and is less sensitive to variations in the distance between the sensor and the sample.Here we formulate the theory of LoFoS and numerically compute the calibration function which is necessary for determining the unknown electrical conductivity from the measurement of a Lorentz force.
基金
Item Sponsored by Deutsche Forschungsgemeinschaft (DFG) in the Framework of the Research Training Group"Lorentz Force Velocimetry and Lorentz Force Eddy Current Testing"Imenau University of Technology
