CN109544769A - A kind of access control system and control method based on Wiegand protocol - Google Patents
A kind of access control system and control method based on Wiegand protocol Download PDFInfo
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- CN109544769A CN109544769A CN201910045521.1A CN201910045521A CN109544769A CN 109544769 A CN109544769 A CN 109544769A CN 201910045521 A CN201910045521 A CN 201910045521A CN 109544769 A CN109544769 A CN 109544769A
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- Prior art keywords
- data
- access
- bar code
- gate inhibition
- authority information
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/27—Individual registration on entry or exit involving the use of a pass with central registration
Abstract
The present invention relates to a kind of access control systems based on Wiegand protocol, access controller including being set to monitoring center, bar code reading module and gate inhibition at gate inhibition act executive device, the bar code reading module includes camera, first main control unit, Wiegand protocol circuit, camera scans bar code, first main control unit is decoded bar code to obtain authority information, then binary number is encoded into after authority information being encrypted, data penetration transmission is carried out by the Wiegand protocol circuit, the access controller receives the data from bar code reading module, decoding decryption obtains authority information, and it is compared with the default access stored in access controller, if comparison passes through, then gate inhibition is notified to act executive device and execute corresponding operating according to authority information.Advantages of the present invention: the data bits of transmission is no longer influenced by the limitation of Wiegand protocol, realizes remote transmission data with arbitrary length, the different bar code of the various length of Adaptive Transmission.
Description
Technical field
The present invention relates to a kind of access control system and control method based on Wiegand protocol, belong to access control system field.
Background technique
Wiegand agreement is standard unified in the world, is a kind of communication protocol suitable for access control system.It has
Many formats, the 26-bit of standard are most common formats, and in addition there are the formats such as 34-bit, 36-bit.And standard 26-bit
Format is an open format, open to all gate inhibition's IC card users, and almost all of access control system all receives mark
Quasi- 26-Bit format.The 26-bit Wiegand output format of standard is as follows: E XXXX XXXX XXXX XXXX XXXX XXXX
O, wherein the 1st and the 26th is check bit, 2-9 are producer's codes, and only 10-25 is that card number position can be used for transmitting information.
In the Wiegand protocol of either 26-bit or extended formatting, in each data packet, the data volume for being used for transmission access permission is
Fixed digit, and limited bits.
However, in existing access control system, not only wanting being capable of recognition access control system IC card, it is necessary to can identify bar code.In item
Code identification industry, miscellaneous barcode types are numerous, and data length is different, transmit according to root agreement, then need according to every
A kind of yard of information content formulates the Wiegand data format of corresponding digit, for example, for when carrying access permission information, as item
The bar code of code must include temporal information, and authorization privilege, authorization ID or customer number etc., the data volume for needing to transmit is big, then
Need the Wiegand data format of seniority top digit.Since the data volume of transmission gate inhibition's IC card is smaller, it is passed according to existing Wiegand
Defeated mode, it is necessary to which, using the data transfer mode of two kinds of bit formats, this undoubtedly increases coding and access control at gate inhibition
The decoding complex degree of device reduces decoding efficiency, and when the transmission information that access control system bar code changes or needs to carry changes (biography
Transmission of data reduces or increases) when, and Wiegand data format must be modified again by the secondary development of peopleware.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of access control system based on Wiegand protocol, the numbers of transmission
The limitation of data format in Wiegand protocol is no longer influenced by according to digit, can either recognition access control system card can identify bar code again, additionally it is possible to
It is complicated to reduce coding and decoding while realizing remote transmission data with arbitrary length for the different bar code of the various length of Adaptive Transmission
Degree improves coding and decoding efficiency.
Technical solution of the present invention one is as follows:
A kind of access control system based on Wiegand protocol, the access controller including being set to monitoring center, the bar code at gate inhibition
It distinguishes module and gate inhibition acts executive device, the bar code reading module includes camera, the first main control unit, Wiegand protocol
Circuit, the camera scanning include the bar code of access permission information, and first main control unit is decoded to obtain to bar code
For the authority information of access control movement executive device, it is encoded into binary number after then encrypting authority information, described two
System number carries out data penetration transmission by the Wiegand protocol circuit, and the access controller receives the number from bar code reading module
According to decoding decryption obtains authority information, and it is compared with the default access stored in access controller, if comparing logical
It crosses, then notifies gate inhibition to act executive device and execute corresponding operating according to authority information.
More preferably, the bar code is generated in client, by the APP managing gate inhibition permission in client, generates the power
The authority information is transmitted to access controller as the default access by limit information, and described in being generated according to authority information
Bar code.
More preferably, the Wiegand protocol circuit include a metal-oxide-semiconductor Q1, a metal-oxide-semiconductor Q2 and two Transient Suppression Diode D1,
D2, when first main control unit exports binary number 0, the I/O interface GP0 output pulse signal control of the first main control unit
Metal-oxide-semiconductor Q1 conducting, metal-oxide-semiconductor Q1 externally transmit undersuing by data-interface TP1, the first main control unit output two into
When making several 1, the I/O interface GP1 output pulse signal control metal-oxide-semiconductor Q2 conducting of the first main control unit, metal-oxide-semiconductor Q2 is connect by data
Mouth TP2 externally transmits undersuing, realizes the transmission of binary number, and the data-interface TP1 connection transient state inhibits two
Pole pipe D1, the data-interface TP2 connection Transient Suppression Diode D2.
More preferably, the access controller judge the data from bar code reading module whether the mode packet of end of transmission
It includes: 1), presetting timeout threshold: after data are transmitted, not receiving new data in timeout threshold, then determine the number
According to the end of transmission；2), preset termination character: recognizing apparatus sends preset termination character when completing data penetration transmission, works as gate inhibition
When controller receives the termination character, the secondary the data transfer ends are determined.
More preferably, the access control system further includes access card identification module comprising coil and card reading unit, access card lean on
When near line circle, the signal sensed is transmitted to the card reading unit by coil, and the card reading unit decodes to obtain card number information, so
After send it to first main control unit, first main control unit is encoded into binary number after encrypting card number information,
Data penetration transmission is carried out by the Wiegand protocol circuit, the access controller receives the data from bar code reading module, solution
Code decryption obtains card number information, and it is compared with the corresponding default access of the card number stored in access controller, if
Comparison passes through, then notifies gate inhibition to act executive device and execute corresponding operating according to authority information.
More preferably, the bar code is two dimensional code, one-dimension code, customized pattern or threedimensional model.
More preferably, the authority information include authorization ID number, the period of entrance, gate inhibition number, authorization object name and/
Or authorization details.
The present invention also provides a kind of access control methods based on Wiegand protocol.
Technical solution of the present invention two is as follows:
A kind of access control method based on Wiegand protocol, including identification decoding step, permission determination step and execution step:
The identification decoding step: the bar code reading module at gate inhibition passes through item of the camera scanning comprising access permission information
Code, the bar code reading module obtain the authority information for access control movement executive device by being decoded to bar code,
Then binary number is encoded into after authority information being encrypted, the binary number carries out data penetration transmission by Wiegand protocol circuit；
The permission determination step: set on the access controller of monitoring center, the data at gate inhibition is received, are decoded
It is compared, passes through if comparing, into the execution with the default access stored in access controller to authority information, and by it
Step；
The execution step: control signal of gate inhibition's movement executive device reception from access controller at gate inhibition, and according to
The control signal executes corresponding operating.
More preferably, the bar code is generated in client, by the APP managing gate inhibition permission in client, generates the power
The authority information is transmitted to access controller as the default access by limit information, and described in being generated according to authority information
Bar code.
More preferably, the Wiegand protocol circuit include a metal-oxide-semiconductor Q1, a metal-oxide-semiconductor Q2 and two Transient Suppression Diode D1,
D2, the authority information scrambled is at binary number, when transmitting binary number 0 to access controller, the conducting of metal-oxide-semiconductor Q1,
Metal-oxide-semiconductor Q1 externally transmits undersuing by data-interface TP1, when transmitting binary number 1 to access controller, metal-oxide-semiconductor Q2
Conducting, metal-oxide-semiconductor Q2 externally transmits undersuing by data-interface TP2, completes the transmission of binary number, the data connect
Mouthful TP1 connection Transient Suppression Diode D1, the data-interface TP2 connection Transient Suppression Diode D2 are prevented quiet
Electricity and external voltage pass through data-interface TP1 and TP2 breakdown metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2.
More preferably, the access controller judges whether the mode of end of transmission includes: 1), in advance to the data at gate inhibition
If timeout threshold: after data are transmitted, not receiving new data in timeout threshold, then determine the secondary data transmission knot
Beam；2), preset termination character: gate inhibition, which is in, to complete to send preset termination character when data penetration transmission, when access controller receives
When to the termination character, the secondary the data transfer ends are determined.
More preferably, the identification decoding step further include: access card, solution are distinguished by access card identification module at gate inhibition
Code obtains the corresponding card number information of access card, is encoded into binary number after then encrypting card number information, is assisted by the Wiegand
It discusses circuit and carries out data penetration transmission；
The permission determination step further include: set on the access controller of monitoring center, receive the data at gate inhibition, decoding
Decryption obtains card number information, and it is compared with the corresponding default access of the card number stored in access controller, if than
To passing through, into the execution step；
The execution step: control signal of gate inhibition's movement executive device reception from access controller at gate inhibition, and according to
The control signal executes corresponding operating.
More preferably, the bar code is two dimensional code, one-dimension code, customized pattern or threedimensional model.
More preferably, the authority information include authorization ID number, the period of entrance, gate inhibition number, authorization object name and/
Or authorization details.
The invention has the following beneficial effects:
1, a kind of access control system and control method based on Wiegand protocol of the present invention, the permission that bar code reading module is identified are believed
After breath is encrypted and is encoded into binary number, data penetration transmission is carried out by Wiegand protocol circuit, transmits random length at a distance
Data, the adaptive different bar code of various length, meanwhile, distinctive data penetration transmission mode, which improves, cracks difficulty, data
It transmits safer；
2, a kind of access control system and control method based on Wiegand protocol of the present invention, bar code can be generated in client, be used
It is more convenient；
3, a kind of access control system and control method based on Wiegand protocol of the present invention, Wiegand protocol circuit structure is simple and pacifies
Quan Xinggao reduces equipment cost；
4, a kind of access control system and control method based on Wiegand protocol of the present invention by setting timeout threshold or terminates word
Symbol, that is, can determine whether data transmission finishes, easy realization easy to operate；
5, a kind of access control system and control method based on Wiegand protocol of the present invention, can be compatible with simultaneously access card and bar code this two
Kind identification method does not need the Wiegand protocol data format using two kinds of bit numbers, no matter and access card after data penetration transmission
Corresponding card number information and the corresponding authority information of bar code, whether the data length of the two is identical or data length is too long, door
When taboo controller receives data, access control can be realized using a kind of identical decoding process, greatly reduce encoding and decoding
Complexity, improve coding and decoding efficiency；
6, a kind of access control system and control method based on Wiegand protocol of the present invention, can be applied to various bar codes, application range
Extensively；
7, a kind of access control system and control method based on Wiegand protocol of the present invention, wherein it is wide can to cover content for authority information, and
The project that authorization message is included can be changed at any time, compared with existing access control system, and without changing institute according to actual needs
The Wiegand protocol of use, it is not necessary to carry out secondary software exploitation.
Detailed description of the invention
Fig. 1 is a kind of frame diagram of the access control system based on Wiegand protocol of the present invention；
Fig. 2 is a kind of schematic diagram of the bar code identification module of the access control system based on Wiegand protocol of the present invention；
Fig. 3 is the schematic diagram of bar code identification module and gate inhibition's identification module in the present invention；
Fig. 4 is gate inhibition's identification module schematic diagram in the present invention comprising indicator light；
Fig. 5 is Wiegand protocol circuit diagram in the present invention；
Fig. 6 is that the present invention is based on the flow charts of the access control method of Wiegand protocol；
Fig. 7 is that the present invention is based on another flow charts of the access control method of Wiegand protocol.
Specific embodiment
It is next in the following with reference to the drawings and specific embodiments that the present invention will be described in detail.
Embodiment one
Please refer to Fig. 1 and Fig. 2, a kind of access control system based on Wiegand protocol, the access controller including being set to monitoring center, if
Bar code reading module and gate inhibition at gate inhibition act executive device, and the bar code reading module includes camera, the first master control
Unit processed, Wiegand protocol circuit, the camera scanning include the bar code of access permission information, and first main control unit is to item
Code is decoded to obtain the authority information for access control movement executive device, is encoded into two after then encrypting authority information
System number, the binary number carry out data penetration transmission by the Wiegand protocol circuit, and the data penetration transmission refers to the number of transmission
It is packaged according to the data format not according still further to Wiegand protocol, but authority information is directly sent out；The access control
Device receives the data from bar code reading module, decoding decryption obtains authority information, and by its with stored in access controller
Default access is compared, and passes through if comparing, and notifies gate inhibition to act executive device and execute corresponding operating according to authority information.Institute
It states bar code to generate in client, by the APP managing gate inhibition permission in client, the authority information is generated, by the permission
Information is transmitted to access controller as the default access, and generates the bar code according to authority information.The client packet
Include mobile terminal and computer.
IOTC09A0 main control chip can be selected in first main control unit.
The bar code identification module can also connect LED light and buzzer, whether remind user by LED light and buzzer
It identifies successfully.
Referring to Fig. 5, the Wiegand protocol circuit includes a metal-oxide-semiconductor Q1, a metal-oxide-semiconductor Q2 and two Transient Suppression Diodes
D1, D2, when first main control unit exports binary number 0, the I/O interface GP0 output pulse signal control of the first main control unit
Metal-oxide-semiconductor Q1 conducting processed, metal-oxide-semiconductor Q1 externally transmit undersuing, the first main control unit output two by data-interface TP1
When system number 1, the I/O interface GP1 output pulse signal control metal-oxide-semiconductor Q2 conducting of the first main control unit, metal-oxide-semiconductor Q2 passes through data
Interface TP2 externally transmits undersuing, realizes the transmission of binary number, and the data-interface TP1 connection transient state inhibits
Diode D1, the data-interface TP2 connection Transient Suppression Diode D2.The present embodiment by Transient Suppression Diode with
Metal-oxide-semiconductor combines, and prevents electrostatic and external voltage from puncturing metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, circuit structure by data-interface TP1 and TP2
Simple and external interference resistance is strong.As shown in figure 5, the metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 can select N-MOSFET, the institute
State metal-oxide-semiconductor Q1 and connect power vd-L with the pole G of metal-oxide-semiconductor Q2, the pole D connects power vd-H, and VD-L(voltage value)≤VD-H(voltage
Value).
The access controller judges whether the mode of end of transmission includes: 1), in advance to the data from bar code reading module
If timeout threshold: after data are transmitted, not receiving new data in timeout threshold, then determine the secondary data transmission knot
Beam；2), preset termination character: recognizing apparatus sends preset termination character when completing data penetration transmission, when access controller connects
When receiving the termination character, the secondary the data transfer ends are determined.
Existing common bar code has two dimensional code, one-dimension code, and present invention can also apply to the bar codes of other forms, such as its
Its customized pattern, threedimensional model etc..The bar code can be shared or print to authorized user's (i.e. authorization object).
The specific application example of this implementation is as follows:
Authority information is arranged by APP in client in step 1, user: the name of visitor, the visiting time, gate inhibition's number with
And access permission be open, such as: wangxs, 8:00-12:00,1,1, wherein first 1 for gate inhibition number, second 1 expression door
Prohibiting permission is to open in generation；
Those authority informations are sent to access controller preservation, while automatically generating bar code in APP application end by step 2, by this
Bar code is shared with visitor；
Step 3, visitor scan the bar code in bar code reading module at gate inhibition, the decoding of bar code reading module generates permission
Information " wangxs, 8:00-12:00,1,1 "；
Step 4 encrypts authority information, for example, using RSA1024 public key encryptions, after encryption are as follows:
“IG3sNMdGiX5oKXGRJaezn0gxa+RGYHgCaEu9p4Jur6T8slmS3sRdyQYCTlUXWIcRjbCvZGSiDMF
vpb1XSxe19vDLcwvBmsB+BAHru1Bk3B1xEPgiqQSPOsMp38/UPWahoDsNCHmO+ZXyrya9Ou7tmr/
g3VfQX33jlwmuKmgBwkc=”
Step 5, the authority information encrypted are according to ASCII character translation table at binary number (high position is in preceding low level rear):
“0100 1001 0100 0111 0011 0011 0111 0011 …… 0110 1011 0110 0011 0011 1101”
Wiegand protocol circuit in step 6, bar code reading module carries out data penetration transmission (low level is in a preceding high position rear): " 1001
0010 1110 0010 1100 1100 1100 1110 …… 1101 0110 1100 0110 1011 1100"；
Step 7, access controller receive data (low level is in a preceding high position rear): " 1,001 0,010 1,110 0,010 1,100 1100
1100 1110 …… 1101 0110 1100 0110 1011 1100"；
Step 8, received data are arranged (high position is in preceding low level rear): " 0,100 1,001 0,100 0,111 0,011 0011
0111 0011 …… 0110 1011 0110 0011 0011 1101"；
Step 9, the data received change into character string according to ASCII character conversion table: " IG3sNMdGiX5oKXGRJaezn0gxa+
RGYHgCaEu9p4Jur6T8slmS3sRdyQYCTlUXWIcRjbCvZGSiDMFvpb1XSxe19vDLcwvBmsB+
BAHru1Bk3B1xEPgiqQSPOsMp38/UPWahoDsNCHmO+ZXyrya9Ou7tmr/g3VfQX33jlwmuKmgBwkc
="；
Above-mentioned character string RSA1024 private keys of progress are decrypted to obtain data by step 10: " wangxs, 8:00-12:00,1,1 ",
It is compared with the default access stored in access controller, comparison passes through, and is numbered according to gate inhibition and controls corresponding gate inhibition
Movement executive device is acted accordingly.
In the present embodiment, by the first main control unit by authority information scrambled at binary number after, pass through Wiegand
(when output is 0, GP0 interface drags down a period of time to protocol circuit, exports when being 1, then GP1 interface drags down a period of time.Do not having
When having data transmission, holding+5V high level) immediate data transparent transmission do not use any format limitation transmission number during transparent transmission
According to digit, the data length for the authority information for no matter including in bar code have how long, can normal transmission, therefore, the present invention
Access control system, the bar code reading module at gate inhibition is integrated with the functions such as barcode scanning, identification, data conversion, data penetration transmission, converts
For binary number afterwards by Wiegand protocol circuit transmission, data capacity is unrestricted, can change at any time according to actual needs
The authorization project that authority information is included, the data of elasticity transmission different length, the different bar code of adaptive various length.Together
When, access control system of the present invention is based on Wiegand protocol and uses distinctive data transfer mode, improves and cracks difficulty, and data are transmitted more
Safety.
Embodiment two
Fig. 3 and Fig. 4 are please referred to, the present embodiment is that the access control system of this implementation further includes door compared with the difference technology of embodiment one
Prohibit card identification module comprising coil and card reading unit, when access card is close to coil, the signal sensed is transmitted to institute by coil
Card reading unit is stated, the card reading unit decodes to obtain card number information, is then sent to first main control unit, described
One main control unit is encoded into binary number after encrypting card number information, the binary number is carried out by the Wiegand protocol circuit
Data penetration transmission, the access controller receive the data from bar code reading module, and decoding decryption obtains card number information, and by its
It is compared with the corresponding default access of the card number stored in access controller, passes through if comparing, it is logical according to authority information
Know that gate inhibition acts executive device and executes corresponding operating.
In the present embodiment, the second main control unit can also be added in access card identification module, what card reading unit decoded
Card number information is forwarded to the first main control unit by the second main control unit, and second main control unit connects warning light, cue card
Number whether effectively.STM32 main control chip can be selected in second main control unit, and FM17550 card reading can be selected in the card reading unit
Chip.
The access control system of this implementation can be compatible with access card and bar code both identification methods simultaneously, pass through Wiegand
When protocol circuit transmits data, due to using data penetration transmission mode, no matter the corresponding card number information of access card and bar code are corresponding
Whether the data length of authority information, the two is identical or data length is too long, also no longer needs to be considered as two kinds of difference bit
Several Wiegand data format, when access controller receives data, without judging that gate inhibition's control can be realized in corresponding decoding process
System.
Embodiment three
It please refers to Fig. 1 and Fig. 2, a kind of access control method based on Wiegand protocol, including identification decoding step, permission and determines step
Rapid and execution step:
The identification decoding step: at gate inhibition, bar code reading module passes through item of the camera scanning comprising access permission information
Code, the bar code reading module are decoded bar code to obtain the authority information for access control movement executive device, then
Binary number is encoded into after authority information is encrypted, the binary number carries out data penetration transmission by the Wiegand protocol circuit,
The data penetration transmission refers to that the data of transmission are not packaged according still further to the data format of Wiegand protocol, but authority information is straight
It connects and sends out；The permission determination step: set on the access controller of monitoring center, the data at gate inhibition, solution are received
Code decryption obtains authority information, and it is compared with the default access stored in access controller, passes through if comparing, and enters
The execution step；The execution step: the gate inhibition at gate inhibition acts executive device and receives the control letter from access controller
Number, and corresponding operating is executed according to the control signal.The bar code is generated in client, manages door by the APP in client
Prohibit permission, generates the authority information, the authority information is transmitted to access controller as the default access, and according to
Authority information generates the bar code.The client includes mobile terminal and computer.
The bar code reading module further includes the first main control unit, and first main control unit is decoded bar code
To the authority information for access control movement executive device, it is encoded into binary number after then encrypting authority information, is passed through
The Wiegand protocol circuit carries out data penetration transmission.
More preferably, the Wiegand protocol circuit include a metal-oxide-semiconductor Q1, a metal-oxide-semiconductor Q2 and two Transient Suppression Diode D1,
D2, the authority information scrambled is at binary number, when transmitting binary number 0 to access controller, the conducting of metal-oxide-semiconductor Q1,
Metal-oxide-semiconductor Q1 externally transmits undersuing by data-interface TP1, when transmitting binary number 1 to access controller, metal-oxide-semiconductor Q2
Conducting, metal-oxide-semiconductor Q2 externally transmits undersuing by data-interface TP2, completes the transmission of binary number, the data connect
Mouthful TP1 connection Transient Suppression Diode D1, the data-interface TP2 connection Transient Suppression Diode D2 are prevented quiet
Electricity and external voltage pass through data-interface TP1 and TP2 breakdown metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2.The present embodiment is by Transient Suppression Diode
In conjunction with metal-oxide-semiconductor, prevent electrostatic and external voltage from puncturing metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, circuit knot by data-interface TP1 and TP2
Structure is simple and external interference resistance is strong.Specifically, when transmitting binary number to access controller, first main control unit is defeated
Out when binary number 0, the I/O interface GP0 output pulse signal control metal-oxide-semiconductor Q1 conducting of the first main control unit, metal-oxide-semiconductor Q1 passes through
Data-interface TP1 externally transmits undersuing, when first main control unit exports binary number 1, the first main control unit
I/O interface GP1 output pulse signal controls metal-oxide-semiconductor Q2 conducting, and metal-oxide-semiconductor Q2 externally transmits negative pulse letter by data-interface TP2
Number.IOTC09A0 main control chip can be selected in first main control unit.The metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 can select N-
MOSFET。
The access controller judges whether 1) mode of end of transmission includes:, presets time-out the data at gate inhibition
Threshold value: after data are transmitted, not receiving new data in timeout threshold, then determines the secondary the data transfer ends；2),
Default termination character: gate inhibition, which is in, to complete to send preset termination character when data penetration transmission, when access controller receives the knot
When beam character, the secondary the data transfer ends are determined.
Existing common bar code has two dimensional code, one-dimension code, and present invention can also apply to the bar codes of other forms, such as its
Its customized pattern, threedimensional model etc..The bar code can be shared or print to authorized user's (i.e. authorization object).
The specific application example of this implementation is as follows:
Authority information is arranged by APP in client in step 1, user: the name of visitor, the visiting time, gate inhibition's number with
And access permission be open, such as: wangxs, 8:00-12:00,1,1, wherein first 1 for gate inhibition number, second 1 expression door
Prohibiting permission is to open in generation；
Those authority informations are sent to access controller preservation, while automatically generating bar code in APP application end by step 2, by this
Bar code is shared with visitor；
Step 3, visitor scan the bar code in bar code reading module at gate inhibition, the decoding of bar code reading module generates permission
Information " wangxs, 8:00-12:00,1,1 "；
Step 4 encrypts authority information, for example, using RSA1024 public key encryptions, after encryption are as follows:
“IG3sNMdGiX5oKXGRJaezn0gxa+RGYHgCaEu9p4Jur6T8slmS3sRdyQYCTlUXWIcRjbCvZGSiDMF
vpb1XSxe19vDLcwvBmsB+BAHru1Bk3B1xEPgiqQSPOsMp38/UPWahoDsNCHmO+ZXyrya9Ou7tmr/
g3VfQX33jlwmuKmgBwkc=”
Step 5, the authority information encrypted are according to ASCII character translation table at binary number (high position is in preceding low level rear):
“0100 1001 0100 0111 0011 0011 0111 0011 …… 0110 1011 0110 0011 0011 1101”
Wiegand protocol circuit in step 6, bar code reading module carries out data penetration transmission (low level is in a preceding high position rear): " 1001
0010 1110 0010 1100 1100 1100 1110 …… 1101 0110 1100 0110 1011 1100"；
Step 7, access controller receive data (low level is in a preceding high position rear): " 1,001 0,010 1,110 0,010 1,100 1100
1100 1110 …… 1101 0110 1100 0110 1011 1100"；
Step 8, received data are arranged (high position is in preceding low level rear): " 0,100 1,001 0,100 0,111 0,011 0011
0111 0011 …… 0110 1011 0110 0011 0011 1101"；
Step 9, the data received change into character string according to ASCII character conversion table: " IG3sNMdGiX5oKXGRJaezn0gxa+
RGYHgCaEu9p4Jur6T8slmS3sRdyQYCTlUXWIcRjbCvZGSiDMFvpb1XSxe19vDLcwvBmsB+
BAHru1Bk3B1xEPgiqQSPOsMp38/UPWahoDsNCHmO+ZXyrya9Ou7tmr/g3VfQX33jlwmuKmgBwkc
="；
Above-mentioned character string RSA1024 private keys of progress are decrypted to obtain data by step 10: " wangxs, 8:00-12:00,1,1 ",
It is compared with the default access stored in access controller, comparison passes through, and is numbered according to gate inhibition and controls corresponding gate inhibition
Movement executive device is acted accordingly.
In the present embodiment, bar code identification module by authority information scrambled at binary number after, pass through Wiegand protocol
(when output is 0, GP0 interface drags down a period of time to circuit, exports when being 1, then GP1 interface drags down a period of time.Do not counting
When according to transmission, holding+5V high level) immediate data transparent transmission do not use any format limitation transmission data during transparent transmission
Digit, the data length for the authority information for no matter including in bar code have how long, can normal transmission, therefore, door of the invention
Access control system, the bar code reading module at gate inhibition is integrated with the functions such as barcode scanning, identification, data conversion, data penetration transmission, after conversion
For binary number by Wiegand protocol circuit transmission, data capacity is unrestricted, can change permission at any time according to actual needs
The authorization project that information is included, the data of elasticity transmission different length, the different bar code of adaptive various length.Meanwhile this
Invention access control system is based on Wiegand protocol and uses distinctive data transfer mode, improves and cracks difficulty, and data transmission is safer.
Example IV
The present embodiment is that this implementation access control method supports recognition access card, in gate inhibition compared with the difference technology of embodiment three
Place both can obtain access permission by access card, can also obtain access permission by bar code, and in data transmission procedure,
It is specific as follows without using the Wiegand data format of two kinds of bit numbers according to transmitted data amount:
The identification decoding step: at gate inhibition, bar code reading module passes through item of the camera scanning comprising access permission information
Code, the bar code reading module are decoded bar code to obtain the authority information for access control movement executive device, then
Binary number is encoded into after authority information is encrypted, the binary number is carried out the binary number by Wiegand protocol circuit
Data penetration transmission；Or access card is distinguished by access card identification module at gate inhibition, decoding obtains the corresponding card number information of access card,
Then it is encoded into binary number after card number information being encrypted, data penetration transmission, the card number are carried out by the Wiegand protocol circuit
It the encryption of information and is encoded into binary number and can be completed by the bar code identification module；
The permission determination step further include: set on the access controller of monitoring center, receive the data at gate inhibition, decoding
Decryption obtains authority information or card number information, and it is compared with the default access stored in access controller, if comparing
Pass through, into the execution step；
The execution step: control signal of gate inhibition's movement executive device reception from access controller at gate inhibition, and according to
The control signal executes corresponding operating.
The access control method of this implementation can be compatible with access card and bar code both identification methods simultaneously, pass through Wiegand
When protocol circuit transmits data, due to using data penetration transmission mode, no matter the corresponding card number information of access card and bar code are corresponding
Whether the data length of authority information, the two is identical or data length is too long, it is no longer necessary to using the Wei of two kinds of difference bit numbers
When access controller receives data, without corresponding decoding process is judged, gate inhibition's control is can be realized in root protocol data format
System.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (14)
1. a kind of access control system based on Wiegand protocol, the access controller including being set to monitoring center, the item at gate inhibition
Code recognition module and gate inhibition act executive device, it is characterised in that: the bar code reading module includes camera, the first main control
Unit, Wiegand protocol circuit, the camera scanning include the bar code of access permission information, and first main control unit is to bar code
Be decoded to obtain the authority information for access control movement executive device, be encoded into after then encrypting authority information two into
Number processed, the binary number carry out data penetration transmission by the Wiegand protocol circuit, and the access controller, which receives, comes from bar code
The data of module are distinguished, decoding decryption obtains authority information, and it is compared with the default access stored in access controller
It is right, pass through if comparing, notifies gate inhibition to act executive device and execute corresponding operating according to authority information.
2. a kind of access control system based on Wiegand protocol according to claim 1, it is characterised in that: the bar code is in visitor
Family end generates, and by the APP managing gate inhibition permission in client, generates the authority information, the authority information is transmitted to
Access controller generates the bar code as the default access, and according to authority information.
3. a kind of access control system based on Wiegand protocol according to claim 1, it is characterised in that: the Wiegand protocol electricity
Road includes that a metal-oxide-semiconductor Q1, a metal-oxide-semiconductor Q2 and two Transient Suppression Diode D1, D2, first main control unit export binary system
When several 0, the I/O interface GP0 output pulse signal control metal-oxide-semiconductor Q1 conducting of the first main control unit, metal-oxide-semiconductor Q1 passes through data-interface
TP1 externally transmits undersuing, when first main control unit exports binary number 1, the I/O interface of the first main control unit
GP1 output pulse signal controls metal-oxide-semiconductor Q2 conducting, and metal-oxide-semiconductor Q2 externally transmits undersuing by data-interface TP2, realizes
The transmission of binary number, the data-interface TP1 connection Transient Suppression Diode D1, data-interface TP2 connection institute
State Transient Suppression Diode D2.
4. a kind of access control system based on Wiegand protocol according to claim 1, it is characterised in that: the access controller
Judge whether 1) mode of end of transmission includes:, presets timeout threshold the data from bar code reading module: when data transfer
Cheng Hou, does not receive new data in timeout threshold, then determines the secondary the data transfer ends；2) termination character, is preset: recognition
Equipment sends preset termination character when completing data penetration transmission, and when access controller receives the termination character, determining should
Secondary the data transfer ends.
5. a kind of access control system based on Wiegand protocol according to claim 1, it is characterised in that: further include that access card is known
Other module comprising coil and card reading unit, when access card is close to coil, the signal sensed is transmitted to the card reading by coil
Unit, the card reading unit decode to obtain card number information, are then sent to first main control unit, first master control
Unit is encoded into binary number after encrypting card number information, carries out data penetration transmission, the gate inhibition by the Wiegand protocol circuit
Controller receives the data from bar code reading module, and decoding decryption obtains card number information, and by its with deposited in access controller
The corresponding default access of the card number of storage is compared, and passes through if comparing, and notifies gate inhibition that movement executes dress according to authority information
Set execution corresponding operating.
6. a kind of access control system based on Wiegand protocol according to claim 1, it is characterised in that: the bar code is two dimension
Code, one-dimension code, customized pattern or threedimensional model.
7. a kind of access control system based on Wiegand protocol according to claim 1, it is characterised in that: the authority information packet
Include authorization ID number, the period of entrance, gate inhibition's number, authorization object name and/or authorization details.
8. a kind of access control method based on Wiegand protocol, which is characterized in that including identifying decoding step, permission determination step
And execute step:
The identification decoding step: the bar code reading module at gate inhibition passes through item of the camera scanning comprising access permission information
Code, the bar code reading module obtain the authority information for access control movement executive device by being decoded to bar code,
Then binary number is encoded into after authority information being encrypted, the binary number carries out data penetration transmission by Wiegand protocol circuit；
The permission determination step: set on the access controller of monitoring center, the data at gate inhibition is received, are decoded
It is compared, passes through if comparing, into the execution with the default access stored in access controller to authority information, and by it
Step；The execution step: control signal of gate inhibition's movement executive device reception from access controller at gate inhibition, and according to
The control signal executes corresponding operating.
9. a kind of access control method based on Wiegand protocol according to claim 8, it is characterised in that: the bar code exists
Client generates, and by the APP managing gate inhibition permission in client, generates the authority information, the authority information is transmitted
To access controller as the default access, and the bar code is generated according to authority information.
10. a kind of access control method based on Wiegand protocol according to claim 8, it is characterised in that: the Wiegand
Protocol circuit includes a metal-oxide-semiconductor Q1, a metal-oxide-semiconductor Q2 and two Transient Suppression Diode D1, D2, the authority information scrambled
At binary number, when transmitting binary number 0 to access controller, the conducting of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 passes through TP1 pairs of data-interface
Outer transmission undersuing, when transmitting binary number 1 to access controller, the conducting of metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 is connect by data
Mouth TP2 externally transmits undersuing, completes the transmission of binary number, and the data-interface TP1 connection transient state inhibits two
Pole pipe D1, the data-interface TP2 connection Transient Suppression Diode D2 prevent electrostatic and external voltage from passing through data-interface
TP1 and TP2 punctures metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2.
11. a kind of access control method based on Wiegand protocol according to claim 8, it is characterised in that: the gate inhibition
Controller judges whether 1) mode of end of transmission includes:, presets timeout threshold the data at gate inhibition: when data transfer
Cheng Hou, does not receive new data in timeout threshold, then determines the secondary the data transfer ends；2) termination character: gate inhibition, is preset
It is in and completes to send preset termination character when data penetration transmission, when access controller receives the termination character, determine this time
The data transfer ends.
12. a kind of access control method based on Wiegand protocol according to claim 8, it is characterised in that: the identification
Decoding step further include: access card is distinguished by access card identification module at gate inhibition, decoding obtains the corresponding card number of access card
Information is encoded into binary number after then encrypting card number information, carries out data penetration transmission by the Wiegand protocol circuit；
The permission determination step further include: set on the access controller of monitoring center, receive the data at gate inhibition, decoding
Decryption obtains card number information, and it is compared with the corresponding default access of the card number stored in access controller, if than
To passing through, into the execution step；
The execution step: control signal of gate inhibition's movement executive device reception from access controller at gate inhibition, and according to
The control signal executes corresponding operating.
13. a kind of access control method based on Wiegand protocol according to claim 8, it is characterised in that: the bar code
It is two dimensional code, one-dimension code, customized pattern or threedimensional model.
14. a kind of access control method based on Wiegand protocol according to claim 8, it is characterised in that: the permission
Information includes authorization ID number, the period of entrance, gate inhibition's number, authorization object name and/or authorization details.
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| CN110287136A (en) * | 2019-05-29 | 2019-09-27 | 广东天波信息技术股份有限公司 | Equipment, method and the storage medium of a variety of Wiegand signal mechanism can be compatible with |
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