CN102496197A - Digital radio frequency door lock - Google Patents
Digital radio frequency door lock Download PDFInfo
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- CN102496197A CN102496197A CN2011104001705A CN201110400170A CN102496197A CN 102496197 A CN102496197 A CN 102496197A CN 2011104001705 A CN2011104001705 A CN 2011104001705A CN 201110400170 A CN201110400170 A CN 201110400170A CN 102496197 A CN102496197 A CN 102496197A
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- door lock
- key card
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- control module
- communication chip
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Abstract
The invention relates to a digital radio frequency door lock. The digital radio frequency door lock comprises a key card and a door lock host which is matched with the key card, wherein the key card comprises a control module, a radio frequency communication chip which is connected with the control module, and a power module which supplies power to the control module and the radio frequency communication chip; the door lock host comprises a main control panel, a voice-controlled switch, an electromagnetic door lock, and the power module which supplies power to the main control panel, the voice-controlled switch and the electromagnetic door lock; and the main control panel comprises a singlechip control module, the radio frequency communication chip, a memory and a wired serial communication chip. The digital radio frequency door lock is high in anti-interference capacity and high in safety.
Description
Technical field
The present invention relates to a kind of digital RF door lock with the single-chip microcomputer Based Intelligent Control.
Background technology
The gate inhibition's card that is widely used in the market is essentially contactless card, does not use battery, belongs to the passive card category, and low cost of manufacture has good encryption performance, and has relevant industry standard to follow, and technology maturation is reliable.But be exactly because must follow certain industry standard, the mode of operation of these passive cards, communication link, data preservation form etc. are disclosed, exist by the approach of malicious intrusions.
Summary of the invention
The object of the present invention is to provide a kind of employing single-chip microcomputer design, antijamming capability is strong, safe digital RF door lock.
For achieving the above object, the technical scheme that the present invention adopted is: a kind of digital RF door lock, comprise key card and with its door lock main frame to joining,
Described key card comprises control module, and the radio communication chip that is connected with this control module provides the power module of power supply for said control module and radio communication chip;
Described door lock main frame comprises master control board, audio-switch, electromagnetic door lock and is the power module that above-mentioned module provides power supply that described master control board comprises single chip control module, radio communication chip, memory and wired serial communication chip.
It is that 3V, capacity are the CR2032LiMn powered battery of 225mAh that power module on the described key card adopts voltage.
Radio communication chip on described key card and the door lock main frame is selected nRF905 for use.
Control module on the said key card is selected the MSP430F2001 single-chip microcomputer for use.
Power module on the described door lock main frame is external 12VDC power supply.
Single chip control module on the described door lock main frame is selected the STC5A56S2 single-chip microcomputer for use.
Described memory is selected AT24C02B for use.
Described wired serial communication chip adopts MAX485.
Because the employing of technique scheme, the present invention compared with prior art has the following advantages: because had so many frequency, address selective, therefore, the possibility of key card generation repeated code is 0; Because the emissive power of both sides' configuration is little; Be merely-2dBm, and the antenna of key card is PCB character, is non-50 ohms impedance match antennas; Therefore actual emission power is littler; Be no more than 1.5 meters with the effective communication distance of door lock main frame, and can adjust as required, thereby generation wireless signal data are disturbed and the possibility of leakage is also extremely low; If key card is lost, because there is not the instruction of door lock main frame, key card can initiatively outwards not revealed any data.Employed key card at first can be realized the reliable encryption of communication through software in this digital radio frequency door lock, secondly, because need not consider standard criterion, the communication protocol customization, the external world can't obtain the effective way of invasion, thereby the security performance of communication is higher.
Description of drawings
Fig. 1 is the key card circuit diagram;
Fig. 2 is door lock host circuit figure;
Fig. 3 is a power circuit diagram;
Fig. 4 is limited serial communication chip circuit figure.
Embodiment
As shown in Figure 1, the power module 3 of key card is that 3V, capacity are the CR2032LiMn powered battery of 225mAh by voltage, and radio communication chip 2 is selected nRF905 for use, and the core of control module 1 is a single-chip microcomputer, preferably uses MSP430F2001.Generally speaking, the power button on the key card is in off-state, thereby key card do not work, and this moment, the power consumption of key card can be ignored; Press the button on the key card, key card is promptly started working; Key card is in rf wireless signal wait accepting state at the beginning; If receive the rf wireless signal that meets the key card configuration this moment; MSP430F2001 can read these data; If this data are the order codes that the door lock main frame is given through differentiating, then key card gets into the wireless radiofrequency emission state, oneself card number data is sent to the door lock main frame of program setting; After accomplishing transmission, enter into the wait accepting state again; If unclamp button in this process, then key card quits work because of outage.
As shown in Figure 2, the door lock main frame is made up of master control board, audio-switch 4, electromagnetic door lock 5, the single chip control module 6 in the master control board, and its single-chip microcomputer STC12C5A56S2 is the control core of door lock main frame.The audio-switch signal meets the connection terminal J1 in the master control board, is responsible for collection by the P0.0 of single-chip microcomputer STC12C5A56S2; The P0.1 of STC12C5A56S2 is responsible for pilot relay K6, and K6 often opens the Kai Heguan of node through connection terminal J114 control electromagnetic door lock; Radio communication chip 7 on the master control borad is selected nRF905 for use; Radio communication chip nRF905 and the electronic component that some are peripheral are installed on the little pcb board together; Constitute radio-frequency communication module; This module is installed on the double needle stand JP1 in the master control board, and the P1 mouth of single-chip microcomputer STC12C5A56S2 (P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7) and P3.2 are responsible for the operation to radio-frequency communication module through JP1; The P3.4 of single-chip microcomputer STC12C5A56S2, P3.5, P3.6 are responsible for the read-write operation to storer 8 data chip AT24C02B; The P2.7 of single-chip microcomputer STC12C5A56S2, P3.0, P3.1 isolate back and wired serial communication chip 10 through photoelectricity, and MAX485 constitutes annexation, and data are responsible for transmitting-receiving by MAX485, and are as shown in Figure 4.The door lock main frame adopts the power supply of 12V lead-acid battery; Carry charger (meeting 220VAC); The 12V direct current is given audio-switch, electromagnetic door lock and master control board power supply respectively; Use the DC/DC of 2 12V/5V to isolate the conversion electric power module in the master control board, the one tunnel gives the power supply of MAX485 serial communication circuit, and another road supplies power to the single-chip microcomputer work system in the master control board.As shown in Figure 5.The door lock main frame needs to use computer to download the key card number through serial communication port and is kept in the storage chip AT24C02B before use.Gate main frame at ordinary times is in waiting status, if receive computer instruction through MAX485, and the key card number among the then renewable AT24C02B; Usually there is being the people to come in front of the door, because the sound and after triggering audio-switch, the signal output node of audio-switch can remain closed in a period of time after the single-chip microcomputer on the master controller obtains this signal, is promptly controlled nRF905 work; Expend wireless instructions of transmission in about 0.01 second earlier and come out, sent the back and just waited for the reply data that receives key card,, then follow and send instruction, wait for again after the completion if in 0.99 second, do not receive; If receive the reply data of key card during this period, then,, then open electromagnetic door lock, if fail then ignore this number if compare successfully at once with the number of key card and the number comparison that is stored among the AT24C02B; Audio-switch signal node is after time-delay is broken off, and the gate main frame gets into waiting status again.
The employed frequency range of the radio communication of key card and door lock main frame is the 433M part in ISM (industry, scientific research, the medical treatment) frequency range, totally 256 available channels, and concrete frequency is by the register configuration decision of nRF905; No matter be key card or door lock main frame, be 4 bytes by the nRF905 configured address, promptly 32 of 2 systems, total nearly 4294967296 addresses supply to use; Key card be numbered 2 bytes, promptly from 0 to 65535; Both sides' radio transmitted power all is made as-2dBm; Valid data during communication are 3 bytes; Door lock main frame, preceding 2 bytes that send to key card be order code (0x01,0x01); The 3rd byte is the exclusive or check sign indicating number; To key card, preceding 2 bytes of replying to the valid data of door lock main frame are the key card numberings, and the 3rd byte is the exclusive or check sign indicating number.It is that the protocol configuration of both sides' radio communication wants consistent that key card and door lock main frame are wanted the prerequisite of proper communication.
The foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this; Can not limit protection scope of the present invention with this; All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (8)
1. digital RF door lock is characterized in that: comprise key card and with its door lock main frame to joining,
Described key card comprises control module (1), and the radio communication chip (2) that is connected with this control module (1) provides the power module (3) of power supply for said control module (1) and radio communication chip (2);
Described door lock main frame comprises master control board, audio-switch (4), electromagnetic door lock (5) and is the power module (9) that above-mentioned module provides power supply that described master control board comprises single chip control module (6), radio communication chip (7), memory (8) and wired serial communication chip (10).
2. digital RF door lock according to claim 1 is characterized in that: it is that 3V, capacity are the CR2032LiMn powered battery of 225mAh that the power module on the described key card (3) adopts voltage.
3. digital RF door lock according to claim 1 is characterized in that: the radio communication chip on described key card and the door lock main frame (2,7) is selected nRF905 for use.
4. digital RF door lock according to claim 1 is characterized in that: the control module on the said key card (1) is selected the MSP430F2001 single-chip microcomputer for use.
5. digital RF door lock according to claim 1 is characterized in that: the power module (9) on the described door lock main frame is external 12VDC power supply.
6. digital RF door lock according to claim 1 is characterized in that: the single chip control module (6) on the described door lock main frame is selected the STC5A56S2 single-chip microcomputer for use.
7. digital RF door lock according to claim 1 is characterized in that: described memory (8) is selected AT24C02B for use.
8. digital RF door lock according to claim 1 is characterized in that: described wired serial communication chip (10) adopts MAX485.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104001705A CN102496197A (en) | 2011-12-06 | 2011-12-06 | Digital radio frequency door lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104001705A CN102496197A (en) | 2011-12-06 | 2011-12-06 | Digital radio frequency door lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102496197A true CN102496197A (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104001705A Pending CN102496197A (en) | 2011-12-06 | 2011-12-06 | Digital radio frequency door lock |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1512029A (en) * | 2002-12-27 | 2004-07-14 | 陈荣裕 | Lock control system |
| CN201278162Y (en) * | 2008-10-10 | 2009-07-22 | 深圳市翰乾电子科技有限公司 | Passive keyless gate inhibition system for automobile |
| EP2098998A2 (en) * | 2008-03-03 | 2009-09-09 | DORMA GmbH + Co. KG | Access control system and method for operating such a system |
| CN101985267A (en) * | 2010-03-29 | 2011-03-16 | 苏州市梯欧梯汽车电子有限公司 | Automobile safety system comprising intelligent passive keyless entry system and tire pressure monitoring system, and control method |
| CN201915717U (en) * | 2010-12-23 | 2011-08-03 | 陈浩 | Keyless entry system for intelligent security door |
-
2011
- 2011-12-06 CN CN2011104001705A patent/CN102496197A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1512029A (en) * | 2002-12-27 | 2004-07-14 | 陈荣裕 | Lock control system |
| EP2098998A2 (en) * | 2008-03-03 | 2009-09-09 | DORMA GmbH + Co. KG | Access control system and method for operating such a system |
| CN201278162Y (en) * | 2008-10-10 | 2009-07-22 | 深圳市翰乾电子科技有限公司 | Passive keyless gate inhibition system for automobile |
| CN101985267A (en) * | 2010-03-29 | 2011-03-16 | 苏州市梯欧梯汽车电子有限公司 | Automobile safety system comprising intelligent passive keyless entry system and tire pressure monitoring system, and control method |
| CN201915717U (en) * | 2010-12-23 | 2011-08-03 | 陈浩 | Keyless entry system for intelligent security door |
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Application publication date: 20120613 |