Audio books use templates to set checkpoints, and use barcode readers and point-reading pens to detect

Comprehensively apply the above two detection methods, use the finished line of the book as the basis to make a template with jammed paper, and make a number of 8mm inspection holes on the jammed paper from top to bottom and from left to right, and place the jammed paper. On the printed product, use a barcode reader and a point reading pen to detect the data and sound of the printed product in the hole, and compare it with the sample.