At present, in order to solve the problem of increasingly congested urban traffic, major cities across the country have begun the construction of map projects. The construction of urban and intercity rail transit has also become a key project invested by the state in recent years. The self-service ticket vending machine is used to solve the collaborative work platform of various terminal devices of the rail transit system, and is mainly responsible for automatic ticket sales, automatic ticket checking, manual ticket sales, checkout and clearing. Figure: Self-service ticket vending machine operation process. First, passengers can select the destination site according to the map displayed on the passenger display, and the passenger display promptly displays the amount required for ticket purchase; then, the main control unit sends the banknote or coin module to allow the receipt of banknotes At this time, passengers can choose paper money or coins to buy tickets, and put the paper money or coins into the paper money or coin module. The passenger display promptly displays the amount of the passenger’s input, and then the main control unit sends instructions to the ticket card to read and write the ticket. Card operation, automatic change to complete the ticketing function after success. Is the operation of the self-service ticket machine very simple? This saves us a lot of time when buying tickets.