Systems and methods for autonomous stroboscopic machine inspection for multi-point and multi-frequency vibration measurement

A system (100) comprising:

• a memory (102) storing instructions;
• one or more communication interfaces (106);
• and
• one or more hardware processors (104) coupled to the memory (102) via the one or more communication interfaces (106), wherein the one or more hardware processors (104) are configured by the instructions to:
• (i) select based on a camera frequency or a frame rate or one or more prime numbers, an initial strobe frequency;
• (ii) capture using the optical strobing, a video and performing conversion of the video into one or more image frames to obtain a marker position for each of the one or more image frames;
• (iii) calculate using the marker position for the one or more image frames, a fast Fourier transformation (FFT) on time series of the marker position for each of the one or more image frames;
• (iv) derive using the FFT, a frequency amplitude spectrum for obtaining one or more peak prominent frequencies or remainders to detect one or more optimum signal frequencies;
• (v) obtain from the one or more peak prominent frequencies or remainders, one or more frequencies having an optimum signal-to-noise-ratio;
• (vi) based on the one or more peak prominent frequencies or remainders perform at least one of:
• (a) optimize using the next available prime number from the one or more of prime numbers, strobing frequency and repeating steps (i) to (v) until one or more of the peak prominent frequencies or remainders are obtained;
• and
• (b) obtain using the one or more of frequencies having an optimum signal-to-noise-ratio, a product set of the one or more peak prominent frequencies or remainders;
• and
• (vii) based on the value of the product set of the one or more peak prominent frequencies or remainders, perform at least one of:
• (a) optimize the strobing frequency using the next available prime numbers from the one or more of prime numbers, where the value of the product set of one or more of the peak prominent frequencies or remainders obtained is not equal to an optimum pre-defined system value and repeating one or more of the above steps until the value of the product set obtained equals to the optimum pre-defined system value;
• and
• (b) obtain by applying the chinese remainder theorem on the product set and the strobe frequency set, one or more of an arbitrary vector from the product set of peak frequencies or remainders, a coset of one or more of the arbitrary vectors, one or more of an arbitrary coset from the coset of the arbitrary vectors, a common element from the arbitrary cosets, one or more of a potential frequency component for detecting and measuring a plurality of vibrations of multiple frequencies.

One or more non-transitory machine readable information storage mediums comprising one or more instructions which when executed by one or more hardware processors causes the one or more hardware processor to perform a method for an optical strobing based multi-frequency vibration measurement, said method comprising:

• (i) selecting, based on a camera frequency or a frame rate or one or more prime numbers, an initial strobe frequency;
• (ii) capturing, using the optical strobing, a video and performing conversion of the video into one or more image frames to obtain a marker position for each of the one or more image frames;
• (iii) calculating, using the marker position for the one or more image frames, a fast Fourier transformation (FFT) on time series of the marker position for each of the one or more image frames;
• (iv) deriving, using the FFT, a frequency amplitude spectrum for obtaining one or more peak prominent frequencies or remainders to detect one or more optimum signal frequencies;
• (v) obtaining, from the one or more peak prominent frequencies or remainders, one or more frequencies having an optimum signal-to-noise-ratio;
• and
• (vi) based on the one or more peak prominent frequencies or remainders performing at least one of:
• (a) optimizing, using the next available prime number from the one or more of prime numbers, strobing frequency and repeating steps (i) to (v) until one or more of the peak prominent frequencies or remainders are obtained;
• and
• (b) obtaining, using the one or more of frequencies having an optimum signal-to-noise-ratio, a product set of the one or more peak prominent frequencies or remainders;
• (vii) based on the value of the product set of the one or more peak prominent frequencies or remainders, performing at least one of:
• (a) optimizing the strobing frequency, using the next available prime numbers from the one or more of prime numbers, where the value of the product set of one or more of the peak prominent frequencies or remainders obtained is not equal to an optimum pre-defined system value and repeating one or more of the above steps until the value of the product set obtained equals to the optimum pre-defined system value;
• and
• (b) obtaining, by applying the Chinese remainder theorem on the product set and the strobe frequency set, one or more of an arbitrary vector from the product set of peak frequencies or remainders, a coset of one or more of the arbitrary vectors, one or more of an arbitrary coset from the coset of the arbitrary vectors, a common element from the arbitrary cosets, one or more of a potential frequency component for detecting and measuring a plurality of vibrations of multiple frequencies.