The practical application design of IC card technology "one card" system
2024-03-26 13:10:42
With the continuous development of the application of IC card technology, especially the development of readable and writable non-contact IC card technology, the scope of "one card" application has been extended to a wider field of weak electricity. However, the pursuit of new technologies and the realization of the "one card" concept will not bring success to practical applications, but will result in waste of funds and instability of the entire system. This paper describes the rationality of the "one card" system design in practical engineering applications with the design of the "smart card" system of the weak current system of a tourist resort.
A tourist resort in China, covering an area of ​​over 100,000 square meters. The interior includes: theme parks, hotels, holiday villas, car rentals, and other travel services, including integrated wiring systems, computer network systems, database management systems, satellite and cable TV systems, security systems, hotel management systems, and intelligence. Door lock system, parking lot management system, smart card consumption management system, etc. As the various fee management systems of the tourist resort, the most ideal one is the "one card" system. The card has:
(1) The door lock key function of the hotel;
(2) In-house entertainment consumption function;
(3) The key function of the holiday villa;
(4) The function of paying for car rental and chartering;
(5) The payment function of various consumption in the theme park;
(6) Parking lot entry and exit and payment functions.
There is no need to bring cash and metal keys to the entire resort. All traffic and consumption are realized by “cardsâ€. The realization of such a "one card" system may have certain difficulties in the past few years, but it is already achievable under the current technical conditions of the IC card. Whether the current "one card" technology in the engineering practice of tourist resorts is appropriate and necessary, and whether the system after implementation is stable is a must for weak electric design engineers. This is also the possibility and reliability of the entire weak current system project. The basis of sex.
1 System Requirements Analysis
The basic demand for “one card†as a tourist resort is the six items mentioned above. However, whether to use the "one card" and "one card" to travel through the village system solutions for these projects depends on the actual needs of each system, the technical level of the mainstream equipment of each system, and the network related technologies of each system. The "one-card" application depends on the network connection of each system. The specific analysis is as follows:
1.1 The key to the door of the hotel room and holiday villa
The key to the door of the hotel room and holiday villa requires the use of an IC card instead of a metal key. The lock to be opened is set by the card issuing system of the IC card, and the effective use time (according to the payment of the guest and the predetermined number of days). The unlocked data can be automatically recorded in the memory inside the lock, and there is no need to know the opening and closing of the door lock in real time online. It is only necessary to read the data in the lock by a relatively simple method, such as a handheld collector or a portable PC. Via RS232 interface and so on. These features are sufficient for the actual hotel door lock management. Online real-time monitoring of the door lock situation (open, closed) and which card enters the real-time data of the record, (the hotel's door lock has only one or two IC card entry, no access control system multi-card into the single door Situation) At the same time, the data is backed up to the backend database. The concept and function of these modern online access control is not necessary in the management of the keys to hotels and villa doors.
1.2 Entertainment consumption within the hotel
In-house entertainment consumption requires the use of an IC card instead of a cash payment. After reading the IC card of the guest through the consumer card reader in the hotel, after checking the validity of the card, the amount of the card in the database is deducted through the database in the background to realize the consumption of the card payment form. In this way, there are basically two modes of credit card consumption. First, the consumer or consumer workstations that are swiped by the card are deducted through the network to the back-end SQL database, and the same amount of data (read-write card) in the IC card is also performed. Deduction (first perform the operation of deducting the IC card, if the data of the background database can be left in the consumer machine and the consumer workstation in the field when the network is busy, and then sent to the server database). Second, when the card is consumed, the consumer workstation does not change the content of the IC card (read-only card), but checks the validity of the card through the network, and then deducts the amount consumed from the background database.
The first scheme in management is more reasonable, corresponding to the IC card technology that can be read and written, and the second scheme corresponds to the IC card technology of the read-only card. However, the hotel entertainment consumption management software applied by the contact IC card is mature and stable than the contactless IC hotel management software because of its long application time. For the resort's hotel consumption, from the point of view of actual demand, all contact-type IC card swipe consumption systems can meet the needs.
1.3 Various consumption of chartering, car rental, theme parks
Renting, renting a car, and all kinds of consumption in theme parks are all using IC cards to spend cash on the consumer or consumer workstations away from the back-end servers. The consumer terminals of these consumer points are remote from the SQL database of the back-end central server and connect and exchange data over a long-distance bus or computer network. Due to the distance and the network, the real-time background data exchange has higher requirements on the network. Therefore, in the application of the IC card, the credit card is used to deduct the amount in the card and simultaneously on the consumer machine and the consumer workstation or (POS). The data stored on the consumer workstation, the data exchange between the SQL database and the consumer workstation in the background of the computer network can be asynchronously performed according to the idle gap of the network. For such long-distance card consumption, there are many technical applications of non-contact IC cards that can be read and written, and contact-type readable and writable IC cards have had some applications in the past few years, due to the development of non-contact IC cards. Lost the market, so the related equipment is rarely produced by manufacturers. Due to the long-distance data communication problem, the read-only IC card must be contacted with the back-end SQL database to confirm the consumption, so there will be a possibility for the guest to wait (this is not the same in the hotel, can not be settled immediately after swiping the card) Wait for the waiter to send it back.
In the resort's chartering, car rental, theme park, all kinds of consumption is to be delivered in real time, otherwise let the people behind wait.) Therefore, according to such requirements, the system is suitable for use with a contactless readable and writable IC card system and related consumer management software.
1.4 Parking lot entry and exit and payment
The development of the parking lot IC management system is also a process from a contact type magnetic card to a contact type IC card to the current non-contact long distance IC card. Since the parking lot is far away (from the driver to the card reader on the card reader in front of the car outside the car), it is inconvenient to use the contact card, and the environment of the card is more than the conditions of the above systems. Poor, so the demand for long-distance non-contact IC is the strongest. According to this basic requirement, the system is suitable for non-contact read-only medium and long distance IC systems and related parking management software.
In summary, according to the principle of applicability and economy, the analysis of the needs of the resort's various smart card systems, without considering the "one card" integration, the situation of each system is as follows:
(1) The hotel door lock uses a contact IC card (non-online) solution;
(2) The hotel's entertainment and consumption solutions for contact IC cards (online) are preferred and have long been used in hotel management systems;
(3) The door lock key of the holiday villa is realized by a contact IC card (non-online) system;
(4) Non-contact readable and writable IC card (online) solution for car rental and chartering;
(5) The consumption system in the theme park is also the same as (4);
(6) It is better to use the non-contact medium and long-range read-only IC card for parking in and out of the parking lot.
2 Analysis of the “one card†system
Combine the above six management systems. If you use "one card", you need to move each system closer to one direction. To meet the highest requirements of the subsystem, you can use readable and writable non-contact IC cards. Readers in systems (1), (3), and (6) use read-only readers, and readers in systems (2), (4), and (5) use readable and writable readers. machine. For online systems (2), (4), (5), (6), as well as back-end servers and SQL database systems. The equipment grades of (1), (2), and (3) need to be adjusted, and the corresponding hotel management software needs to be written to cooperate with it. Such a system design scheme is theoretically feasible. However, in the actual engineering application, we will encounter a series of work stability problems after integration of various systems and the modification work of the new hotel management software in combination with management in actual use, and then the whole The cost of the system is increased.
The integration of each subsystem currently uses the workstation to work on a Windows NT working platform, using the TCP/IP protocol, the server running system integration software and the SQL database, and each workstation shares the data of the server SQL database; each workstation The RS232 serial port is converted into RS485 or RS422 bus to communicate with each front controller and consumer machine; the controller and the card reader use the WEIGAND communication interface of the access control standard for communication; the card reader and the card reader in the consumer machine are used. The high-frequency radio communicates with the IC card, thus forming a system integration structure of "one card".
The data of the IC card is transmitted to the card reader and the consumer machine through the high frequency radio; the card reader is transmitted to the controller through the WEIGAND communication interface; the consumer machine and the controller transmit the data to the subsystem management workstation through the RS485 and RS422 bus; Connect to the server's SQL database via Ethernet. This completes the transfer of data from the IC card to the database. On the contrary, the data of the SQL database is also transmitted down to the readable and writable non-contact IC card in the same path to complete a complete data communication (opening and closing, parking in and out, payment, etc.).
In this series of communication, the high-frequency radio communication between the IC card and the card reader, the WEIGAND format data communication between the card reader and the controller, and the Ethernet communication between the workstation and the server are internationally common. The communication protocol is available and can be used with standard products from off-the-shelf international companies. For a communication link: the bus communication between the consumer machine, the controller and the management workstation is not very uniform.
Although there are large companies' products and a complete set of solutions at present, due to price reasons, most of the domestic use of standard consumer machines, controllers and self-developed bus communication interfaces and communication protocols and system management software to achieve system integration. The reliability of communication on this bus becomes a key to system stability.
In terms of hotel management, hotel management software based on contact IC cards for hotel door locks and consumer management has passed the test of time. At present, few manufacturers have introduced non-contact IC card hotel door locks (cost is the main reason) and a matching hotel management software system, which makes the choice of products small.
3 pragmatically choose a smart card system
Based on the analysis in the previous section, the management of hotel door locks and villa door locks is far from being raised to require online and read and write IC card data. In order to realize the application of “one cardâ€, the largest number of doors in the resort will be spent. The modification of the lock for the non-contact IC card application seems to be inefficient. Considering the effectiveness and reliability of the entire system, there are two options to choose from.
First of all, do not blindly pursue the realization of "one card". For the door lock system of hotels and resort villas, contact IC (read-only, non-online) system is still used, which is compatible with the hotel management system applied for many years. A contactless IC card online system is used for theme parks, car rentals, chartering, and parking lots. For the hotel's consumption management system, the function and maturity of the consumer management software can be selected in the contact and contactless IC card system. In other words, although it is not a "one card", although it is not very loud to the outside world, it is much more realistic than the real "one card" in terms of system maturity and economy.
At the same time, the core of the technology is still "two cartoons", only a special set of smart cards that integrate contact IC cards and non-contact IC cards (the long-distance swipe function of the parking lot cannot be made, because of the thickness of the active card over long distances) The reason) to achieve the concept of a full-resort resort on the surface of a card.
4 Conclusion
Engineering design is different from scientific research and scientific experiments. What users want is a mature and reliable product rather than an experimental platform for new technologies and new concepts. This allows the engineer to design the planning system from the user's point of view to meet the actual needs of management, and to design the system as the first goal.
A tourist resort in China, covering an area of ​​over 100,000 square meters. The interior includes: theme parks, hotels, holiday villas, car rentals, and other travel services, including integrated wiring systems, computer network systems, database management systems, satellite and cable TV systems, security systems, hotel management systems, and intelligence. Door lock system, parking lot management system, smart card consumption management system, etc. As the various fee management systems of the tourist resort, the most ideal one is the "one card" system. The card has:
(1) The door lock key function of the hotel;
(2) In-house entertainment consumption function;
(3) The key function of the holiday villa;
(4) The function of paying for car rental and chartering;
(5) The payment function of various consumption in the theme park;
(6) Parking lot entry and exit and payment functions.
There is no need to bring cash and metal keys to the entire resort. All traffic and consumption are realized by “cardsâ€. The realization of such a "one card" system may have certain difficulties in the past few years, but it is already achievable under the current technical conditions of the IC card. Whether the current "one card" technology in the engineering practice of tourist resorts is appropriate and necessary, and whether the system after implementation is stable is a must for weak electric design engineers. This is also the possibility and reliability of the entire weak current system project. The basis of sex.
1 System Requirements Analysis
The basic demand for “one card†as a tourist resort is the six items mentioned above. However, whether to use the "one card" and "one card" to travel through the village system solutions for these projects depends on the actual needs of each system, the technical level of the mainstream equipment of each system, and the network related technologies of each system. The "one-card" application depends on the network connection of each system. The specific analysis is as follows:
1.1 The key to the door of the hotel room and holiday villa
The key to the door of the hotel room and holiday villa requires the use of an IC card instead of a metal key. The lock to be opened is set by the card issuing system of the IC card, and the effective use time (according to the payment of the guest and the predetermined number of days). The unlocked data can be automatically recorded in the memory inside the lock, and there is no need to know the opening and closing of the door lock in real time online. It is only necessary to read the data in the lock by a relatively simple method, such as a handheld collector or a portable PC. Via RS232 interface and so on. These features are sufficient for the actual hotel door lock management. Online real-time monitoring of the door lock situation (open, closed) and which card enters the real-time data of the record, (the hotel's door lock has only one or two IC card entry, no access control system multi-card into the single door Situation) At the same time, the data is backed up to the backend database. The concept and function of these modern online access control is not necessary in the management of the keys to hotels and villa doors.
1.2 Entertainment consumption within the hotel
In-house entertainment consumption requires the use of an IC card instead of a cash payment. After reading the IC card of the guest through the consumer card reader in the hotel, after checking the validity of the card, the amount of the card in the database is deducted through the database in the background to realize the consumption of the card payment form. In this way, there are basically two modes of credit card consumption. First, the consumer or consumer workstations that are swiped by the card are deducted through the network to the back-end SQL database, and the same amount of data (read-write card) in the IC card is also performed. Deduction (first perform the operation of deducting the IC card, if the data of the background database can be left in the consumer machine and the consumer workstation in the field when the network is busy, and then sent to the server database). Second, when the card is consumed, the consumer workstation does not change the content of the IC card (read-only card), but checks the validity of the card through the network, and then deducts the amount consumed from the background database.
The first scheme in management is more reasonable, corresponding to the IC card technology that can be read and written, and the second scheme corresponds to the IC card technology of the read-only card. However, the hotel entertainment consumption management software applied by the contact IC card is mature and stable than the contactless IC hotel management software because of its long application time. For the resort's hotel consumption, from the point of view of actual demand, all contact-type IC card swipe consumption systems can meet the needs.
1.3 Various consumption of chartering, car rental, theme parks
Renting, renting a car, and all kinds of consumption in theme parks are all using IC cards to spend cash on the consumer or consumer workstations away from the back-end servers. The consumer terminals of these consumer points are remote from the SQL database of the back-end central server and connect and exchange data over a long-distance bus or computer network. Due to the distance and the network, the real-time background data exchange has higher requirements on the network. Therefore, in the application of the IC card, the credit card is used to deduct the amount in the card and simultaneously on the consumer machine and the consumer workstation or (POS). The data stored on the consumer workstation, the data exchange between the SQL database and the consumer workstation in the background of the computer network can be asynchronously performed according to the idle gap of the network. For such long-distance card consumption, there are many technical applications of non-contact IC cards that can be read and written, and contact-type readable and writable IC cards have had some applications in the past few years, due to the development of non-contact IC cards. Lost the market, so the related equipment is rarely produced by manufacturers. Due to the long-distance data communication problem, the read-only IC card must be contacted with the back-end SQL database to confirm the consumption, so there will be a possibility for the guest to wait (this is not the same in the hotel, can not be settled immediately after swiping the card) Wait for the waiter to send it back.
In the resort's chartering, car rental, theme park, all kinds of consumption is to be delivered in real time, otherwise let the people behind wait.) Therefore, according to such requirements, the system is suitable for use with a contactless readable and writable IC card system and related consumer management software.
1.4 Parking lot entry and exit and payment
The development of the parking lot IC management system is also a process from a contact type magnetic card to a contact type IC card to the current non-contact long distance IC card. Since the parking lot is far away (from the driver to the card reader on the card reader in front of the car outside the car), it is inconvenient to use the contact card, and the environment of the card is more than the conditions of the above systems. Poor, so the demand for long-distance non-contact IC is the strongest. According to this basic requirement, the system is suitable for non-contact read-only medium and long distance IC systems and related parking management software.
In summary, according to the principle of applicability and economy, the analysis of the needs of the resort's various smart card systems, without considering the "one card" integration, the situation of each system is as follows:
(1) The hotel door lock uses a contact IC card (non-online) solution;
(2) The hotel's entertainment and consumption solutions for contact IC cards (online) are preferred and have long been used in hotel management systems;
(3) The door lock key of the holiday villa is realized by a contact IC card (non-online) system;
(4) Non-contact readable and writable IC card (online) solution for car rental and chartering;
(5) The consumption system in the theme park is also the same as (4);
(6) It is better to use the non-contact medium and long-range read-only IC card for parking in and out of the parking lot.
2 Analysis of the “one card†system
Combine the above six management systems. If you use "one card", you need to move each system closer to one direction. To meet the highest requirements of the subsystem, you can use readable and writable non-contact IC cards. Readers in systems (1), (3), and (6) use read-only readers, and readers in systems (2), (4), and (5) use readable and writable readers. machine. For online systems (2), (4), (5), (6), as well as back-end servers and SQL database systems. The equipment grades of (1), (2), and (3) need to be adjusted, and the corresponding hotel management software needs to be written to cooperate with it. Such a system design scheme is theoretically feasible. However, in the actual engineering application, we will encounter a series of work stability problems after integration of various systems and the modification work of the new hotel management software in combination with management in actual use, and then the whole The cost of the system is increased.
The integration of each subsystem currently uses the workstation to work on a Windows NT working platform, using the TCP/IP protocol, the server running system integration software and the SQL database, and each workstation shares the data of the server SQL database; each workstation The RS232 serial port is converted into RS485 or RS422 bus to communicate with each front controller and consumer machine; the controller and the card reader use the WEIGAND communication interface of the access control standard for communication; the card reader and the card reader in the consumer machine are used. The high-frequency radio communicates with the IC card, thus forming a system integration structure of "one card".
The data of the IC card is transmitted to the card reader and the consumer machine through the high frequency radio; the card reader is transmitted to the controller through the WEIGAND communication interface; the consumer machine and the controller transmit the data to the subsystem management workstation through the RS485 and RS422 bus; Connect to the server's SQL database via Ethernet. This completes the transfer of data from the IC card to the database. On the contrary, the data of the SQL database is also transmitted down to the readable and writable non-contact IC card in the same path to complete a complete data communication (opening and closing, parking in and out, payment, etc.).
In this series of communication, the high-frequency radio communication between the IC card and the card reader, the WEIGAND format data communication between the card reader and the controller, and the Ethernet communication between the workstation and the server are internationally common. The communication protocol is available and can be used with standard products from off-the-shelf international companies. For a communication link: the bus communication between the consumer machine, the controller and the management workstation is not very uniform.
Although there are large companies' products and a complete set of solutions at present, due to price reasons, most of the domestic use of standard consumer machines, controllers and self-developed bus communication interfaces and communication protocols and system management software to achieve system integration. The reliability of communication on this bus becomes a key to system stability.
In terms of hotel management, hotel management software based on contact IC cards for hotel door locks and consumer management has passed the test of time. At present, few manufacturers have introduced non-contact IC card hotel door locks (cost is the main reason) and a matching hotel management software system, which makes the choice of products small.
3 pragmatically choose a smart card system
Based on the analysis in the previous section, the management of hotel door locks and villa door locks is far from being raised to require online and read and write IC card data. In order to realize the application of “one cardâ€, the largest number of doors in the resort will be spent. The modification of the lock for the non-contact IC card application seems to be inefficient. Considering the effectiveness and reliability of the entire system, there are two options to choose from.
First of all, do not blindly pursue the realization of "one card". For the door lock system of hotels and resort villas, contact IC (read-only, non-online) system is still used, which is compatible with the hotel management system applied for many years. A contactless IC card online system is used for theme parks, car rentals, chartering, and parking lots. For the hotel's consumption management system, the function and maturity of the consumer management software can be selected in the contact and contactless IC card system. In other words, although it is not a "one card", although it is not very loud to the outside world, it is much more realistic than the real "one card" in terms of system maturity and economy.
At the same time, the core of the technology is still "two cartoons", only a special set of smart cards that integrate contact IC cards and non-contact IC cards (the long-distance swipe function of the parking lot cannot be made, because of the thickness of the active card over long distances) The reason) to achieve the concept of a full-resort resort on the surface of a card.
4 Conclusion
Engineering design is different from scientific research and scientific experiments. What users want is a mature and reliable product rather than an experimental platform for new technologies and new concepts. This allows the engineer to design the planning system from the user's point of view to meet the actual needs of management, and to design the system as the first goal.
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