Method and device for detecting bill printing state and bill printer

The application belongs to the technical field of printers and discloses a method and device for detecting bill printing state and a bill printer. The method for detecting bill printing state comprises the following steps: detecting the paper outlet angular velocity of the paper roll in the printer cartridge by a first sensor when the bill is printed; detecting a printing linear velocity of the bill by a second sensor when the bill is printed; calculating the radius of the paper roll in the printer cartridge according to the paper outlet angular velocity of the paper roll in the printer cartridge and the printing linear velocity of the paper roll when the bill is printed; the state of the printer paper roll is confirmed according to a radius of the paper roll in the printer cartridge. 本申请属于打印机技术领域，公开了种票据打印状态的检测方法、检测装置及票据打印机。所述票据打印状态的检测方法包括：通过第传感器检测打印所述票据时所述打印机纸仓内纸卷的出纸角速度；通过第二传感器检测打印所述票据时所述票据的打印线速度；根据打印所述票据时，所述打印机纸仓内纸卷的出纸角速度和所述票据的打印线速度计算获得所述打印机纸仓内纸卷的半径；根据所述打印机纸仓内纸卷的半径确认所述打印机纸卷的状态。该方法通过票据打印机内装置的两个传感器，检测票据打印机的打印