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1. System overview
POS CateringConsumption Management SystemResponsible for the management of automatic payment, statistical card issuance and various consumption reports of X company employees in the cafeteria. When the user consumes, he does not need to pay cash. The user reads the recharged smart card on the POS machine to complete the payment.
The use of the POS catering consumption management system can effectively improve the work efficiency of the X company’s staff canteen, while eliminating financial loopholes and facilitating management.
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2. System design
According to your actual situation and your requirements, we will design a set of consumer system solutions suitable for you for your reference. Please refer to the following for details:
In order to improve the welfare of the company’s employees, the company invested heavily in the construction of X service centers, including X canteens, X bathing centers, X laundry rooms, X cold drinks, pastry distribution points, and so on.
The design adopts the most advanced domesticNon-contact IC cardIn the consumption system, X consumption points and X subsidy distribution points are set up according to customer needs.
Rice selling systemThe structure diagram is as follows:
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3. System introduction and function description:
3.1 Data Management Center
A SQL server database is installed on the server side, and the basic information of the system and daily consumption records are all backed up in the server’s database. The client accesses and calls the data in the database through the local area network. For the security and stability of the server database, the local area network of the meal selling system consists of only the server, the client and the subsidy machine. There is no connection with the internal network of the enterprise.
3.2 Client Management Center
1. Enterprise card management: it is responsible for the encryption and issuance of the card; it is also responsible for the daily maintenance of the card, such as card loss report, unlocking, card replacement, card replacement, card information correction, single cancellation and batch cancellation, etc. . And generate corresponding reports and flow records, such as cashier daily reports, monthly reports, periodic reports, annual reports, etc., and flow records such as loss report records, unhooked records, etc.
2. Enterprise card recharge: use computer client software and card issuing machine to realize the recharge function of the card on the computer.Software recharge also needs to be logged in by an authorized operator before recharging can be performed
3. POS recharge: use rechargePOS machine, Realize the subsidy recharge of some employee cards by the enterprise, and the recharge POS is operated online through the Ethernet interface, using the networking mode. To enable the recharge program, the authorized operator must log in successfully before the recharge operation can be performed.
4. Query management: query the consumption records, deposit records, card balances, etc. of equipment or units or individuals within a certain period of time. And do the corresponding report.
5. Settlement management: The settlement center is responsible for the management of the funds and accounts of enterprises, merchants, and cardholders in the meal selling system. It is divided into merchant management and settlement, bank transfer reconciliation and transfer account replenishment, system comprehensive financial statements (business and cashier), management and issuance of student subsidies, card business cancellation and settlement, host cash recharge, classification breakdown report (annual , Month, day, meal, customer classification and other reports) and other modules. And supports the clearing and settlement function.
Classified reports can reflect various reports in the system, complete various financial query printing or settlement functions, and provide complete accounting settlement vouchers and settlement procedures.
3.3 How the POS machine works
Calculator method: The waiter directly enters the amount on the window machine, accumulates, and settles.
Dish number input method: The waiter inputs the dish number from the keyboard, and the amount is displayed on the window machine.
Automatic input method: The waiter only needs to supervise, and the window machine displays the automatic charge amount.
Simple input method: The waiter enters the set number, and the window machine displays the amount.
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POS machine workflow
3.4 POS machinespecialty
safety
regardlessIC cardIt is also a radio frequency card, which stores cash in the card, so anti-counterfeiting has become an important sign of system security. General companies (according to the products we have replaced with other companies) use simple encryption, change the transportation password, that is, the factory password to another password, and issue it. All cardholders’ cards are a new password, and the system can be attacked. Very strong. We use the advanced DES encryption algorithm. Through the system code, system key and card number, a random number is calculated by the DES algorithm as the key of the new card. Each card has a password, which makes the system possible to be deciphered. Almost “zero”.
reliability
A. Reliability of card data reading and writing
No product can reach 100%, no matter IC card orRadio frequency card, There is the possibility of errors when reading and writing cards, so how to avoid errors or how to make up for them becomes the focus of work. We have adopted a series of designs to ensure that the possibility of error is minimized on the circuit of reading and writing cards, from stable power supply to reading and writing protection. At the same time, we adopt the idea of using multiple transaction balance cycles in the card to ensure that the card amount is incorrectly written and alarmed. .
B. Reliability of offline data storage of window machine
Unlike magnetic cards and photoelectric cards, IC card and radio frequency card systems rely on the network, but off-network operation brings higher requirements for data storage reliability. To ensure the safe storage of data, we take the following measures:
B1. Increase the cost, use FLASH with its own power supply, and no longer need the power supply of the window machine.
B2. Use storage dual backup to store data to another chip.
B3. Data loss is often due to the loss of FLASH pointers. Our pointers are stored in the FLASH memory to nine places; three places are stored in the clock chip. As long as the pointer is in one place, the data can be ensured, and the reliability of the data of the device where the pointer is only stored in one place is improved several times.
C. Network reliability
The network adopts the parallel wiring method, and the open-circuit communication chip is used in the window machine to prevent the single machine from being busy. Although it increases the cost, it can ensure that the single machine communication failure does not affect the entire network.
Repeat and check duplication function
A serious failure of the network during data transmission causes data loss is another way for the system to make mistakes. In order to prevent this situation, we have added a rereading function in the hardware design; using this function, all data of the window machine can be collected again, and at the same time, a function of filtering out duplicate data has been added to the software.
The necessity of using a backup battery
In the past, the 220v power supply has been short-circuited. Even with UPS power supply, the normal sale of meals cannot be guaranteed; with the backup battery, it can not only guarantee the sale of meals, but also gain time for the maintenance of the line.
Data organization and recovery function
Misoperation in use by the user has caused serious problems in the accounts. This function can restore the accounts as much as possible through some algorithms.
Anti-interference ability
Adding a switching power supply to the machine makes the voltage range wider, avoids the phenomenon of machine heating, and makes the machine performance more stable; at the same time, the improvement of filtering performance further strengthens the equipment’s anti-interference ability, especially for radio frequency card machines.
Device scalability
The system adopts a dual-processor design concept. One processor is responsible for all the functions of the window machine operation, and the other processor is responsible for the card operation. Because of years of engineering experience and product improvements are realized by the main processor, the main processor is The program does not make any changes, so that the system upgrade can be realized quickly.
Fourth, the scope of application of the system
Use non-contact IC cards and electronic money to replace traditional transaction media, which are widely used in restaurants, canteens, laundry shops, shower rooms, post offices, hotels, hotels, clubs, clubs, beauty salons, shopping malls, parking lots, and lending For all internal consumption of books, entertainment, fitness, medical treatment, etc., cardholders can use one card to realize paperless electronic currency settlement within the scope of implementation, and improve work efficiency and management level through the intelligent management of the system.
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