Design Of Coin Recovery System Based On Raspberry Pi

With the rapid development of modern technology,traditional payment methods such as banknotes and coins are gradually being transformed into electronic payment methods based on bank cards,Alipay,and We Chat,most people no longer carry banknotes for money transactions,and coins are deposited in social groups such as families,supermarkets and bus companies because of their easy loss and inconvenient carrying,resulting in waste of social resources.Coins are made of metal materials.Although the cost of making a single coin is low,the large number of deposited coins is a great waste of financial resources.In response to the call for the development of green finance in China,this paper designs a coin recovery system based on Raspberry Pi,aiming at the problem of a large number of coins piling up and wasting at present,and against the negative news background that coins are rejected in some places.This paper analyzes the changing trend of China's payment mode under the background of Internet,understands the current situation of coin recycling in the process of coin selfcirculation,analyzes and summarizes the technologies related to coin identification and number statistics,and then according to these backgrounds and necessary conditions,this paper designs the overall framework of the system,and studies the basic module scheme and corresponding working principles in depth.For the purpose of engineering application,this paper designs the hardware and software parts of three functional modules,which are false identification,statistical counting and man-machine interaction,and realizes the functions of each module through the Raspberry Pi with high performance,low cost and rich functions.In addition,the basic function modules use the sensor technology: the sensor designed by the new inductance digital converter LDC1612 realizes the intuitive digital processing of the identification results;The statistical counting module uses the infrared sensor to sense the high and low level signal changes generated by the object,and realizes fast and accurate statistics on the number of real coins.Under the background that Internet technology promotes the rapid development of social automation and intelligence,and taking into account the flexible use of system function modules,this paper innovatively researches and designs a coin "zero deposit and lump withdrawal" management platform.Through the establishment of the Flask framework and the creation and update of the database,combined with the We Chat applet and web interface design,this paper realizes that independent users can view the current number of coins deposited,and the system administrator can manage the deposit information of all users.After the overall design of the system was completed,the realization and function tests of the functional modules and management platform were carried out.The expected goals and effects were achieved according to the running data and processing results.