CN201004233Y - A RF card reading device with RS485 interface - Google Patents
A RF card reading device with RS485 interface Download PDFInfo
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- CN201004233Y CN201004233Y CNU2006201409581U CN200620140958U CN201004233Y CN 201004233 Y CN201004233 Y CN 201004233Y CN U2006201409581 U CNU2006201409581 U CN U2006201409581U CN 200620140958 U CN200620140958 U CN 200620140958U CN 201004233 Y CN201004233 Y CN 201004233Y
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Abstract
The utility model discloses an RF card reading and writing device which has an RS485 interface, including an MCU control circuit, an RF card reading and writing circuit, an antenna and an electricity power source. The control and output port of the MCU control circuit is connected with the input port of the RF card reading and writing circuit; the address data bus is connected with the address data bus of the RF card reading and writing circuit; the MCU controlling circuit and the RF card reading and writing circuit are both connected with the electricity power source; the signal wire of the RF card reading and writing circuit is connected with the antenna. The utility model also includes an RS485 serial interface circuit whose serial interface and communicating port are connected with each other. The MCU controlling circuit communicates with the outside circuits through the RS485 serial interface circuit and achieves network management and control through the communication between a position machine and a plurality of reading and writing devices. The utility model is helpful for the network development and further development and establishes a foundation for the achievement in the integration of the application system and in the development of network control and management.
Description
[technical field]
The utility model relates to the radio-frequency card read-write equipment, relates in particular to the many standard radio frequencies card read-write equipment that has the RS485 interface.
[background technology]
Extensively exist contactless chip card reader or radio-frequency card to be called for short (rfid card) at present on the domestic and international market, its frequency of operation mostly is 125KHz.Early stage radio-frequency card card reading module often can only be discerned a kind of international standard, does not possess the use compatibility to other international standard radio-frequency cards, poor compatibility, and the radio-frequency card of different international standards can not use in same system.For this reason, it is 200420002521.2 that the applicant has proposed the patent No. on 02 02nd, 2004, name is called a kind of patented claim of contactless smart card read-write equipment, and on 03 16th, 2005 Granted publications, this contactless smart card read-write equipment can be discerned a plurality of international standards such as ISO/IEC14443 A, ISO/IEC 14443 B or ISO/IEC 15693, compatible good, highly versatile.
Though the contactless smart card read-write equipment after process the applicant improves possesses the recognition function of multiple international standard radio-frequency card, this device does not have general standard serial interface; Do not possess the ability with the external circuit direct communication, can't realize network management.Radio-frequency card also is known as contactless smart card, radio-frequency (RF) IC card or intelligent RF card in this manual.
So, how to develop a kind of standard serial interface that has, can realize that the radio-frequency card read-write equipment of network management becomes the important topic of those skilled in the art's research.
[summary of the invention]
The purpose of this utility model solves the problems of the prior art exactly, proposes a kind of radio-frequency card read-write equipment, has standard serial interface, can realize network management.
For achieving the above object, the utility model proposes a kind of radio-frequency card read-write equipment of the RS485 of having interface, comprise the MCU control circuit, the radio-frequency card read/write circuit, antenna and power supply, the control output end of MCU control circuit is connected in the input end of radio-frequency card read/write circuit, the address data bus of MCU control circuit is connected with the address data bus of radio-frequency card read/write circuit, described MCU control circuit all is connected with power supply with the radio-frequency card read/write circuit, the signal wire of radio-frequency card read/write circuit links to each other with antenna, also comprise the RS485 serial interface circuit, the serial port of MCU control circuit is connected with the signal of communication port of RS485 serial interface circuit.
As preferably, described MCU control circuit comprises microcontroller MCU and auxiliary oscillator circuit, and described auxiliary oscillator circuit is connected with microcontroller MCU.
As preferably, described microcontroller MCU is the 89C51 integrated circuit (IC) chip.
As preferably, described radio-frequency card read/write circuit comprises the intelligent read integrated circuit and second auxiliary oscillator circuit, and described intelligent read integrated circuit is connected with second auxiliary oscillator circuit.
As preferably, described intelligent read integrated circuit is the RC632 integrated circuit (IC) chip.
As preferably, described RC632 integrated circuit (IC) chip is carried out ISO/IEC 14443 A, ISO/IEC14443 B and 15,693 three kinds of international standards of ISO/IEC.
As preferably, described RS485 serial interface circuit is made of standard integrated circuit modules or discrete component circuit.
As preferably, described RS485 serial interface circuit adopts 75176 integrated circuit (IC) chip.
The beneficial effects of the utility model: the utility model is based on microcontroller technology, the identification of multinational border standard non-contact intelligent IC-card and standard RS485 serial interface technologies, realize control, the operation of radio-frequency card read/write circuit by the program in the microcontroller MCU chip, analyze intelligent card data content, checking smart card user's validity, valid data are handled, are stored and export.The radio-frequency card read/write circuit carries out exchanges data, judges that the physics validity and the MCU of non-contact card carry out data transmission and carry out reading and writing data under the control of MCU by antenna and radio-frequency card.Microcontroller MCU communicates by letter with external circuit by the RS485 serial interface circuit, and realizes network management and control by communicating by letter between host computer and Duo Tai read-write equipment.The utlity model has standard serial interface, be easy to networking and carry out deep level development, for deep level developments such as the integration that realizes the radio-frequency card application system and networked control and management are laid a good foundation.
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 is the circuit block diagram of the radio-frequency card read-write equipment of a kind of RS485 of having interface of the utility model;
Fig. 2 is the physical circuit schematic diagram of the radio-frequency card read-write equipment of a kind of RS485 of having interface of the utility model.
[embodiment]
Fig. 1 is the circuit block diagram of the radio-frequency card read-write equipment of a kind of RS485 of having interface of the utility model; Comprise MCU control circuit 1, radio-frequency card read/write circuit 2, antenna 3 and power supply 4, the control output end of MCU control circuit 1 is connected in the input end of radio-frequency card read/write circuit 2, the address data bus of MCU control circuit 1 is connected with the address data bus of radio-frequency card read/write circuit 2, described MCU control circuit 1 all is connected with power supply 4 with radio-frequency card read/write circuit 2, the signal wire of radio-frequency card read/write circuit 2 links to each other with antenna 3, also comprise RS485 serial interface circuit 5, the serial port of MCU control circuit 1 is connected with the signal of communication port of RS485 serial interface circuit 5.Radio-frequency card read/write circuit 2 carries out exchanges data, judges that the physics validity and the MCU control circuit 1 of non-contact card carry out data transmission and carry out reading and writing data under the control of MCU control circuit 1 by antenna 3 and radio-frequency card.Be provided with program in the MCU chip of MCU control circuit 1, radio-frequency card read/write circuit 2 controlled, operated, analyze data content, the checking intelligent RF card of intelligent RF card user's validity, valid data are handled, are stored and export.MCU control circuit 1 is communicated by letter with external circuit 6 by RS485 serial interface circuit 5, and by communicate by letter realization network management and control between host computer and Duo Tai read-write equipment.
Fig. 2 is the physical circuit schematic diagram of the radio-frequency card read-write equipment of a kind of RS485 of having interface of the utility model.Described MCU control circuit 1 comprises microcontroller MCU11 and auxiliary oscillator circuit 12, and described auxiliary oscillator circuit 12 is connected with microcontroller MCU11.Auxiliary oscillator circuit 12 preferably is made of a crystal oscillator, two filter capacitors and a resistance, produces oscillator signal by auxiliary oscillator circuit 12 and makes microcontroller MCU11 operate as normal.Described microcontroller MCU11 is the 89C51 integrated circuit (IC) chip.Described radio-frequency card read/write circuit 2 comprises the intelligent read integrated circuit 21 and second auxiliary oscillator circuit 22, and described intelligent read integrated circuit 21 is connected with second auxiliary oscillator circuit 22.Second auxiliary oscillator circuit 22 preferably is made of a crystal oscillator, two filter capacitors and a resistance, produces oscillator signal by second auxiliary oscillator circuit 22 and makes intelligent read integrated circuit 21 operate as normal.Described intelligent read integrated circuit 21 is the RC632 integrated circuit (IC) chip.Described RC632 integrated circuit (IC) chip is carried out ISO/IEC 14443 A, ISO/IEC 14443 B and 15,693 three kinds of international standards of ISO/IEC.Described RS485 serial interface circuit 5 is made of standard integrated circuit modules or discrete component circuit.Described RS485 serial interface circuit 5 adopts 75176 integrated circuit (IC) chip.
The 89C51 chip is controlled the core integrated circuit RC632 operation of radio-frequency card read/write circuit by sheet selected control system P1.0, read-write control W and R signal; RC632 in the radio-frequency card read/write circuit 2 is connected with radio-frequency card read-write antenna with TX2 by RX, TX1, and radio frequency is sticked into capable read-write operation; RC632 sends data exchange request by IRQ to 89C51, and data is delivered to the P0 mouth of 89C51 through the D mouth; Judging radio-frequency card when MCU control circuit 1 is effectively, and data content is handled storage to data, and by the radio-frequency card read/write circuit data processed write back radio-frequency card when satisfying condition; The RXD of 89C51 and TXD are serial i/o ports, are connected to the R and the D of standard RS485 integrated circuit modules 75176, and 75176 B-is connected with external circuit with A+, and realization MCU control circuit 1 is communicated by letter with host computer, other read-write equipments and external network.Adopt single power supply Vcc, direct current+5V in the utility model.
The foregoing description is to explanation of the present utility model, is not to qualification of the present utility model, any circuit after the utility model simple transformation is all belonged to protection domain of the present utility model.
Claims (8)
1. radio-frequency card read-write equipment that has the RS485 interface, comprise MCU control circuit (1), radio-frequency card read/write circuit (2), antenna (3) and power supply (4), the control output end of MCU control circuit (1) is connected in the input end of radio-frequency card read/write circuit (2), the address data bus of MCU control circuit (1) is connected with the address data bus of radio-frequency card read/write circuit (2), described MCU control circuit (1) all is connected with power supply (4) with radio-frequency card read/write circuit (2), the signal wire of radio-frequency card read/write circuit (2) links to each other with antenna (3), it is characterized in that: also comprise RS485 serial interface circuit (5), the serial port of MCU control circuit (1) is connected with the signal of communication port of RS485 serial interface circuit (5).
2. a kind of radio-frequency card read-write equipment that has the RS485 interface as claimed in claim 1, it is characterized in that: described MCU control circuit (1) comprises microcontroller MCU (11) and auxiliary oscillator circuit (12), and described auxiliary oscillator circuit (12) is connected with microcontroller MCU (11).
3. a kind of radio-frequency card read-write equipment that has the RS485 interface as claimed in claim 2 is characterized in that: described microcontroller MCU (11) is the 89C51 integrated circuit (IC) chip.
4. a kind of radio-frequency card read-write equipment that has the RS485 interface as claimed in claim 1, it is characterized in that: described radio-frequency card read/write circuit (2) comprises intelligent read integrated circuit (21) and second auxiliary oscillator circuit (22), and described intelligent read integrated circuit (21) is connected with second auxiliary oscillator circuit (22).
5. a kind of radio-frequency card read-write equipment that has the RS485 interface as claimed in claim 4 is characterized in that: described intelligent read integrated circuit (21) is the RC632 integrated circuit (IC) chip.
6. a kind of radio-frequency card read-write equipment that has the RS485 interface as claimed in claim 5 is characterized in that: described RC632 integrated circuit (IC) chip is carried out ISO/IEC 14443 A, ISO/IEC 14443 B and 15,693 three kinds of international standards of ISO/IEC.
7. a kind of radio-frequency card read-write equipment that has the RS485 interface as claimed in claim 1, it is characterized in that: described RS485 serial interface circuit (5) is made of standard integrated circuit modules or discrete component circuit.
8. a kind of radio-frequency card read-write equipment that has the RS485 interface as claimed in claim 7 is characterized in that: described RS485 serial interface circuit (5) adopts 75176 integrated circuit (IC) chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201409581U CN201004233Y (en) | 2006-12-11 | 2006-12-11 | A RF card reading device with RS485 interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201409581U CN201004233Y (en) | 2006-12-11 | 2006-12-11 | A RF card reading device with RS485 interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201004233Y true CN201004233Y (en) | 2008-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201409581U Expired - Fee Related CN201004233Y (en) | 2006-12-11 | 2006-12-11 | A RF card reading device with RS485 interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201004233Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254203A (en) * | 2011-08-03 | 2011-11-23 | 中山大学深圳研究院 | Implementation method for reading and writing module of comprehensive service card based on digital home |
| CN103679232A (en) * | 2013-12-10 | 2014-03-26 | 成都天志大行信息科技有限公司 | Development assisting device for RFID reader-writer |
| CN104251933A (en) * | 2013-06-26 | 2014-12-31 | 成都新方洲信息技术有限公司 | Novel intelligent electric energy meter |
-
2006
- 2006-12-11 CN CNU2006201409581U patent/CN201004233Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254203A (en) * | 2011-08-03 | 2011-11-23 | 中山大学深圳研究院 | Implementation method for reading and writing module of comprehensive service card based on digital home |
| CN104251933A (en) * | 2013-06-26 | 2014-12-31 | 成都新方洲信息技术有限公司 | Novel intelligent electric energy meter |
| CN103679232A (en) * | 2013-12-10 | 2014-03-26 | 成都天志大行信息科技有限公司 | Development assisting device for RFID reader-writer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20100111 |