Method for compressing wideband sensor signal
AssigneeHitachi, Ltd.
InventorsDaisuke Maeda, Sudhanshu Gaur
Life of this patent
Estimating the term…
Abstract
Example implementations described herein are directed to systems and methods for extracting signal in the presence of noise for industrial IoT systems. Through the example implementations described herein, the high-frequency band signal of the sensor output can be maintained despite data compression, while also retaining information regarding the condition of the machine. Example implementations can also generate compressed data pairs to synchronized downsampled envelopes and spectrum data.
Claims12
A method for managing sensor data from a machine having a plurality of machine states, the method comprising:
- decomposing sensor data into a plurality of band-limited data to generate a decomposed sensor data;
- and
- executing downsampling on each of the decomposed sensor data to generate downsampled decomposed sensor data;
- wherein the downsampling cycle is shorter than a duration of the each of the machine states, and
- wherein the downsampled decomposed sensor data is implemented to identify a signal frequency band containing a signal developed by the machine
- where the method further includes:
- extracting an envelope from the sensor data;
- executing downsampling on the extracted envelope to generate a downsampled envelope;
- synchronizing the downsampled envelope with the downsampled decomposed sensor data as data pairs,
- collecting the data pairs until a predetermined condition is met;
- identifying, from the downsampled decomposed sensor data, the signal frequency band having a signal value satisfying another predetermined condition, and
- storing the identified signal frequency band.
A non-transitory computer readable medium, storing instructions for managing sensor data from a machine having a plurality of machine states, the instructions comprising:
- decomposing sensor data into a plurality of band-limited data to generate a decomposed sensor data;
- and
- executing downsampling on each of the decomposed sensor data to generate downsampled decomposed sensor data;
- wherein the downsampling cycle is shorter than a duration of the each of the machine states,
- wherein the downsampled decomposed sensor data is implemented to identify a signal frequency band containing a signal developed by the machine
- wherein the instructions further includes:
- extracting an envelope from the sensor data;
- executing downsampling on the extracted envelope to generate a downsampled envelope;
- and
- synchronizing the downsampled envelope with the downsampled decomposed sensor data as data pairs
- collecting the data pairs until a predetermined condition is met;
- identifying, from the downsampled decomposed sensor data, the signal frequency band having a signal value satisfying another predetermined condition;
- and
- storing the identified signal frequency band.
Dependencies are inferred from the claim text.