that uses the principle of
electromagnetic induction to convert the measured force value into a change in
self-inductance or mutual inductance. It can usually be divided into
self-inductance type, differential transformer type and piezomagnetic type.
Self-inductance force sensors convert force values into changes in coil
self-inductance, and can be divided into three types: changing air gap
thickness, changing air gap cross-sectional area and movable iron core.