System and method of detecting abnormal movement of a physical object

A method of detecting abnormal movement of a physical object, the method comprising:

• generating, using a transducer, a periodic signal representative of a movement of the physical object,
• generating, by a processor, a raw matrix comprising a first array and a second array, the generation of the raw matrix comprising:
• performing a first analysis on a predetermined portion of the periodic signal to generate the first array, the predetermined portion corresponding to a predetermined time period of the periodic signal;
• and
• performing a second analysis different from the first analysis on the predetermined portion of the periodic signal to generate the second array;
• generating an integrated matrix by performing a dimension reduction on the raw matrix;
• and
• determining a likelihood of a predetermined type of abnormal movement of the physical object by comparing the integrated matrix or a set of indexes derived from the integrated matrix with a predetermined benchmark pattern corresponding to the predetermined type of abnormal movement,
• wherein the first analysis is a mutual information analysis, comprising:
• segmenting the predetermined duration of the periodic signal into a plurality of signal segments, each signal segment including a nominal waveform, and the plurality of signal segments including one or more pairs of adjacent signal segments;
• for each pair of the one or more pairs of adjacent signal segments:
• obtaining two signal arrays having the same size by re-sampling one or both of the adjacent signal segments;
• and
• calculating joint probability and marginal probability of the two signal arrays of the re-sampled adjacent signal segments;
• calculating a mutual information index based on the calculated joint probability and the calculated marginal probability of the one or more pairs of re-sampled adjacent signal segments;
• and
• outputting the likelihood of the predetermined type of abnormal movement of the physical object to a display.