Bill softness recognition method and device

A bill softness recognition device, comprising:

• a receiving unit, configured to receive bills;
• an extracting unit, configured to extract and separate the bills to make the bills enter a bill channel in a separated manner;
• an image capturing unit, configured to capture a single-bill image and a bill background image of each of the extracted bills;
• a driving wheel, configured to roll the extracted bill to make the bill enter a corner in a bill-transmission channel, and to make the bill press a plurality of prearranged force sensors;
• a force sensing unit, configured to acquire effective force signals fed back from the plurality of force sensors, wherein the force sensor is not attached to the driving wheel but rather precedes the driving wheel, and the force sensor is activated when a force of the bill is applied to the force sensor by the bill-transmission channel and the arrangement of the driving wheels;
• an image processing unit, configured to acquire an inclination angle of the bill based on the single-bill image and the bill background image;
• an effectiveness determining unit, configured to determine, based on the inclination angle, the force sensor that is pressed by the bill as an effective force sensor;
• a recognition unit, configured to judge whether the effective force signal of the effective force sensor meets a preset softness condition;
• and
• a bill determining unit, configured to determine the bill as a soft bill if the effective force signal meets the preset softness condition.