Displacement sensor, displacement analysis system and analysis method

The invention provides a displacement sensor, a displacement analysis system and a displacement analysis method, and the displacement sensor comprises a sensing element which comprises an inductor array composed of at least two inductors; a movable metal piece arranged on one side of the sensing element and used for moving relative to the sensing element; and a driving and processing circuit electrically connected with the sensing element and used for driving the sensing element to generate LC oscillation and analyzing the difference of the LC oscillation amplitudes of the inductors. The invention provides a novel non-contact displacement metering method, the structure is simple, the installation is convenient, when the inductor array and the movable metal piece move relatively, the eddy current and mutual inductance effect suffered by the inductors at different positions in the inductor array during LC oscillation are changed, so that the difference of the different inductors on the LC oscillation amplitude