The first tests relating to impedancemetry date back to Georg Simon OHM (1788-1854), a famous physicist, who established the fundamental relationships between current, voltage and electrical resistance. This science has become popular in recent years, particularly in the medical or paramedical fields. However, it should be noted that this science has been implemented in packaging studies since the 80’s. LEREM, for its part, has been practicing these studies since early 90’s.
Imagine that you can materialize a set of elements through a mathematical model and that these elements can give you physical quantities that you can study in absolute way but also in a relative way. For example, how they evolve over time…
This is what happens with modern person scales, which can read your muscle mass index in addition to your fat mass index, or even from one measurement to another can read how your diet changes your muscle mass…
It is one of many examples of impedance measurement applications. The popularized results of these measurements have gone through mathematical modelling. The mathematical models were calibrated based on the results of measurements of very weak and very precise electrical signals at different frequencies. These results were then used to represent your body in an equivalent electrical model of an RLC circuit (resistive, inductive, capacitive).