Gramm Angle field GAF time-series data into the image and applied to the fault diagnosis

0, Preface

The Gramm angle field can convert time series data into image data, which not only preserves the complete information of the signal, but also maintains the time dependence of the signal.After the signal data is converted into image data, the advantages of CNN in image classification and recognition can be fully utilized for modeling.

1. Graham Corner Field (GAF)

For the detailed principle of the Gram angle field, please refer to related papers or blogs.It will not be repeated here.

2. Conversion effect

4 types of bearing fault vibration signals are converted using GAF as follows:

3. Diagnostic modeling

The time series signal is converted into an image after GAF conversion, and can be combined with CNN for modeling analysis later.