Automatic fault diagnosis method and device for sorting machine

1. A method for automatically diagnosing a sorter fault, comprising:

obtaining banknote images of banknotes by scanning;

performing data processing on the banknote images based on a preset detection algorithm, to obtain processing results; and

sending feedback information, in a case that the processing result meets a preset condition;

wherein the performing data processing on the banknote images based on a preset detection algorithm to obtain processing results comprises:

for each of the banknote images,

obtaining the number of pixels of a grayscale histogram of the banknote image;

obtaining a lower limit of a grayscale interval based on a preset lower limit of a ratio and the number of pixels;

obtaining an upper limit of the grayscale interval based on a preset upper limit of the ratio and the number of pixels;

calculating a mean value of the grayscale based on the lower limit of the grayscale interval and the upper limit of the grayscale interval; and

recording the banknote image in an overexposure record, in a case that the mean value of the grayscale meets a preset overexposure condition.

2. The method according to claim 1 , wherein the sending feedback information in a case that the processing result meets the preset condition comprises:

sending the feedback information in a case that the number of banknote images in the overexposure record reaches a preset third value.

3. A device for automatically diagnosing a sorter fault, comprising a processor and a memory storing program codes, wherein the processor performs the stored program codes to:

obtain banknote images of banknotes by scanning;

perform data processing on the banknote images based on a preset detection algorithm to obtain processing results; and

send feedback information in a case that the processing result meets a preset condition;

wherein the processor further performs the stored program codes to:

for each of the banknote images,

obtain the number of pixels of a grayscale histogram of the banknote image;

obtain a lower limit of a grayscale interval based on a preset lower limit of a ratio and the number of pixels;

obtain an upper limit of the grayscale interval based on a preset upper limit of the ratio and the number of pixels;

calculate a mean value of the grayscale based on the lower limit of the grayscale interval and the upper limit of the grayscale interval; and

record the banknote image in an overexposure record in a case that the mean value of the grayscale meets an overexposure condition;

and

send feedback information in a case that the number of banknote images in the overexposure record reaches a preset third value.

4. A device for automatically diagnosing a sorter fault, comprising a processor and a memory storing program codes, wherein the processor performs the stored program codes to:

obtain banknote images of banknotes by scanning;

perform data processing on the banknote images based on a preset detection algorithm to obtain processing results; and

send feedback information in a case that the processing result meets a preset condition;

wherein the processor further performs the stored program codes to:

for each of the banknote images,

obtain the number of pixels of a grayscale histogram of the banknote image;

obtain a lower limit of a grayscale interval based on a preset lower limit of a ratio and the number of pixels;

obtain an upper limit of the grayscale interval based on a preset upper limit of the ratio and the number of pixels;

calculate a mean value of the grayscale based on the lower limit of the grayscale interval and the upper limit of the grayscale interval; and

record the banknote image in an overexposure record in a case that the mean value of the grayscale meets an overexposure condition.