Patent ID: 9741193
Date: 2017-08-22
CPC Classifications: G07D

Claim:
1. A paper currency number recognition device, comprising: a contact sensor configured to acquire paper currency image data by way of transmission imaging; a white light LED transmission light source board arranged right in front of the contact sensor to provide the contact sensor with a transmission light source for use in collecting the paper currency image data; an image collection processing plate connected to the contact sensor through a data cable, wherein a Field Programmable Gate Array and a digital signal processor are integrated on the image collection processing plate, the Field Programmable Gate Array is configured to control the white light LED transmission light source board to be on or off and drive a CIS to acquire images, and the digital signal processor is configured to process and recognize the paper currency image data; and two pairs of position sensors arranged on a paper currency transport pathway at a position with a predetermined distance from the contact sensor and configured to detect whether there is a paper currency entering the paper currency number recognition device; wherein the white light LED transmission light source board has a strong light mode and a weak light mode, and the two light modes alternately provides the contact sensor with the transmission light source for use in collecting the paper currency image data, and wherein, after the Field Programmable Gate Array completes collection of a row of image data, the Field Programmable Gate Array informs the digital signal processor in a manner of an interruption of acquiring data, and the digital signal processor enters an interrupt service routine and detects an image type register to determine a type of the row of image data.