CN217380108U - Automatic locking circuit and intelligent door lock based on RFID technology - Google Patents
Automatic locking circuit and intelligent door lock based on RFID technology Download PDFInfo
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- CN217380108U CN217380108U CN202220829915.3U CN202220829915U CN217380108U CN 217380108 U CN217380108 U CN 217380108U CN 202220829915 U CN202220829915 U CN 202220829915U CN 217380108 U CN217380108 U CN 217380108U
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Abstract
The utility model relates to an automatic locking circuit based on RFID technique, including door lock controller and the non-contact smart card who sets up in door frame spring bolt mouth department, door lock controller includes MCU module, RFID module and feedback circuit, MCU module and RFID module electric connection, and feedback circuit is connected with the ADC function pin electricity of MCU module; through set up RFID module and feedback circuit on the lock controller, and set up the non-contact smart card in door frame spring bolt mouth department, when closing the door, the radio frequency magnetic field that produces on the RFID module fills the ability and receives the UID of non-contact smart card to the non-contact smart card, detect through feedback circuit that the voltage that arouses weakens because of magnetic field intensity weakens, the MCU module confirms whether reach the position of closing the door through the voltage value that weakens simultaneously of UID non-contact smart card through UID to the identity of non-contact smart card, if both accord with then trigger the lock is automatic to be locked, overall circuit structure is simple and easy to realize, need not change current intelligent lock by a wide margin, the automatic precision of locking is higher.
Description
Technical Field
The utility model relates to an intelligence lock technical field, more specifically say, relate to an automatic circuit and intelligent lock of locking based on RFID technique.
Background
Along with the popularization of intelligent door locks, people enter a room to close the door after the door is opened, and the intelligent door locks can be automatically locked, so that the intelligent door locks become a selling point of more and more intelligent door locks.
The existing industry mainly comprises the following methods for solving the problem of automatic locking:
firstly, the automatic locking is realized through overtime, the mode is simple and rough, the automatic locking is realized at regular time after the door is opened, whether the door is closed or not is not detected, and the precision is high.
And secondly, detecting whether the door is closed or not by utilizing a triangular bolt on the lock body through the customized electronic lock body. When the door is closed, the triangular bolt of the lock body is extruded to output a high level signal, and the software judges that the high level signal is the high level signal, the door is considered to be closed, and the automatic locking function is started. The method needs to customize the lock body and replace the original lock body in the home of the user, and the cost is high. When the triangle tongue is pressed down by hand, the problem of false detection still exists.
Thirdly, judging that the door reaches a door closing position by detecting the position of the door lock through geomagnetism, closing the door after the door lock is installed on the door lock, measuring and recording magnetic force values of X, Y and Z axes of the door closing position through a geomagnetic sensor, regularly reading the magnetic force values of the X, Y and Z axes of the geomagnetism after the door is opened and closed again, and starting automatic locking when data of the three axes are consistent; the method has the problem that the detection accuracy is to be improved due to the precision problem of the geomagnetic sensor, the change of the earth magnetic field and the problem that the geomagnetic sensor is easily interfered by the surrounding electromagnetic field.
There is a need for an automatic locking circuit that is simpler, easier to implement, and has a high degree of accuracy.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide an automatic circuit and intelligent lock of locking based on RFID technique.
The utility model provides a technical scheme that its technical problem adopted is:
an automatic locking circuit based on an RFID technology is constructed, wherein the automatic locking circuit comprises a door lock controller and a non-contact smart card arranged at a lock tongue opening of a door frame, the door lock controller comprises an MCU module, an RFID module and a feedback circuit, the MCU module is electrically connected with the RFID module, and the feedback circuit is electrically connected with an ADC (analog-to-digital converter) functional pin of the MCU module;
the RFID module is used for transmitting radio frequency field intensity and reading UID of the non-contact smart card, and is also used for converting the radio frequency field intensity into a current value;
the non-contact smart card triggers the magnetic field intensity change of the radio frequency field intensity when entering the effective area of the radio frequency field intensity;
the feedback circuit is used for converting the current value into a voltage value and then sending the voltage value to the MCU module;
the MCU module is used for receiving the UID read by the RFID module and the voltage value sent by the feedback circuit and controlling automatic locking of the door lock when the UID is judged to be true and the voltage value reaches a set range.
Automatic locking circuit based on RFID technique, wherein, the RFID module include RFID chip, LC series resonance circuit and with the antenna that LC series resonance circuit electricity is connected.
Automatic locking circuit based on RFID technique, wherein, feedback circuit includes feedback resistance, feedback resistance one end with the antenna is parallelly connected and with the ADC function pin electricity of MCU module is connected, feedback resistance's other end ground connection.
Automatic locking circuit based on RFID technique, wherein, LC series resonance circuit and antenna constitute a set of unit, and this unit is provided with two sets ofly.
Automatic locking circuit based on RFID technique, wherein, MCU module model is RTL8762 CK.
Automatic locking circuit based on RFID technique, wherein, the RFID chip model is CV 520.
The intelligent door lock is provided with the automatic locking circuit based on the RFID technology.
The beneficial effects of the utility model reside in that: through set up RFID module and feedback circuit on the lock controller, and set up the non-contact smart card in door frame spring bolt mouth department, when closing the door, the radio frequency magnetic field that produces on the RFID module fills the ability and receives the UID of non-contact smart card to the non-contact smart card, detect through feedback circuit that the voltage that arouses weakens because of magnetic field intensity weakens, the MCU module confirms whether reach the position of closing the door through the voltage value that weakens simultaneously of UID non-contact smart card through UID to the identity of non-contact smart card, if both accord with then trigger the lock is automatic to be locked, overall circuit structure is simple and easy to realize, need not change current intelligent lock by a wide margin, the automatic precision of locking is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the drawings:
fig. 1 is a schematic block diagram of an automatic locking circuit based on RFID technology according to a preferred embodiment of the present invention;
fig. 2 is a circuit diagram of an RFID module and a feedback circuit of an automatic locking circuit according to a preferred embodiment of the present invention;
fig. 3 is a circuit diagram of the MCU module of the automatic locking circuit based on the RFID technology according to the preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of protection of the present invention.
The utility model discloses automatic locking circuit based on RFID technique of preferred embodiment, as shown in fig. 1, refer to fig. 2 and fig. 3 simultaneously, including door lock controller 1 and the non-contact smart card 2 of setting in door frame spring bolt mouth department, door lock controller 1 includes MCU module 10, RFID module 11 and feedback circuit 12, MCU module 10 and RFID module 11 electric connection, feedback circuit 12 is connected with the ADC function pin electricity of MCU module 10;
the RFID module 11 is used for transmitting radio frequency field intensity and reading UID of the non-contact smart card 2, and is also used for converting the radio frequency field intensity into a current value;
the non-contact intelligent card 2 triggers the magnetic field intensity change of the radio frequency field intensity when entering the effective area of the radio frequency field intensity (the RFID module charges the non-contact intelligent card);
the feedback circuit 12 is used for converting the current value into a voltage value and then sending the voltage value to the MCU module 10;
the MCU module 10 is used for receiving the UID read by the RFID module 11 and the voltage value sent by the feedback circuit 12 and controlling the automatic locking of the door lock when the UID is judged to be true and the voltage value reaches a set range;
through set up RFID module 11 and feedback circuit 12 on the lock controller, and set up non-contact smart card 2 in door frame spring bolt mouth department, when closing the door, the radio frequency magnetic field that produces on the RFID module 11 charges can and receives the UID of non-contact smart card 2 to the non-contact smart card, detect through feedback circuit 12 that the voltage that arouses weakens because of magnetic field intensity weakens, MCU module 10 confirms through UID whether the identity of non-contact smart card 2 reachs the position of closing the door through the voltage value that weakens simultaneously, if both accord with then trigger the lock and lock automatically, the whole circuit structure is simple and easy to realize, need not change present intelligent lock by a wide margin, the automatic precision of locking is higher.
Preferably, the RFID module 11 includes an RFID chip 110, an LC series resonant circuit 111, and an antenna electrically connected to the LC series resonant circuit 111; the feedback circuit 12 includes a feedback resistor R16, one end of the feedback resistor R16 is connected in parallel with the antenna and electrically connected to the ADC functional pin of the MCU module, and the other end of the feedback resistor is grounded.
Preferably, the LC series resonant circuit and the antenna constitute a set of cells, the set of cells being provided with two sets of corresponding antennas, the two antennas being labeled ANT1 and ANT2 in fig. 2, respectively.
Preferably, the MCU module is RTL8762CK, and the RFID chip is CV 520; of course, other chip types may be used.
An intelligent door lock is provided with the automatic locking circuit based on the RFID technology.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (7)
1. An automatic locking circuit based on an RFID technology is characterized by comprising a door lock controller and a non-contact smart card arranged at a lock tongue opening of a door frame, wherein the door lock controller comprises an MCU module, an RFID module and a feedback circuit, the MCU module is electrically connected with the RFID module, and the feedback circuit is electrically connected with an ADC (analog to digital converter) functional pin of the MCU module;
the RFID module is used for transmitting radio frequency field intensity and reading UID of the non-contact smart card, and is also used for converting the radio frequency field intensity into a current value;
the non-contact smart card triggers the magnetic field intensity change of the radio frequency field intensity when entering the effective area of the radio frequency field intensity;
the feedback circuit is used for converting the current value into a voltage value and then sending the voltage value to the MCU module;
the MCU module is used for receiving the UID read by the RFID module and the voltage value sent by the feedback circuit and controlling automatic locking of the door lock when the UID is judged to be true and the voltage value reaches a set range.
2. An RFID-technology-based auto-lock circuit according to claim 1, wherein the RFID module includes an RFID chip, an LC series resonant circuit, and an antenna electrically connected to the LC series resonant circuit.
3. The RFID-technology-based automatic locking circuit according to claim 2, wherein the feedback circuit comprises a feedback resistor, one end of the feedback resistor is connected in parallel with the antenna and is electrically connected with an ADC (analog-to-digital converter) functional pin of the MCU module, and the other end of the feedback resistor is grounded.
4. An RFID-based auto-lock circuit according to claim 2 wherein the LC series resonant circuit and antenna comprise a set of two sets of units.
5. An RFID technology based automatic locking circuit according to any of claims 1-4, wherein the MCU module is RTL8762 CK.
6. An RFID technology based auto-lock circuit as claimed in any one of claims 2 to 4, wherein the RFID chip model is CV 520.
7. An intelligent door lock, characterized in that the intelligent door lock is provided with an automatic locking circuit based on RFID technology according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220829915.3U CN217380108U (en) | 2022-04-11 | 2022-04-11 | Automatic locking circuit and intelligent door lock based on RFID technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220829915.3U CN217380108U (en) | 2022-04-11 | 2022-04-11 | Automatic locking circuit and intelligent door lock based on RFID technology |
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| CN217380108U true CN217380108U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220829915.3U Active CN217380108U (en) | 2022-04-11 | 2022-04-11 | Automatic locking circuit and intelligent door lock based on RFID technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115424372A (en) * | 2022-09-21 | 2022-12-02 | 广东汇泰龙科技股份有限公司 | Intelligent lock circuit, unlocking method and device and intelligent lock |
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2022
- 2022-04-11 CN CN202220829915.3U patent/CN217380108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115424372A (en) * | 2022-09-21 | 2022-12-02 | 广东汇泰龙科技股份有限公司 | Intelligent lock circuit, unlocking method and device and intelligent lock |
| CN115424372B (en) * | 2022-09-21 | 2023-10-20 | 广东汇泰龙科技股份有限公司 | Intelligent lock circuit, unlocking method and device and intelligent lock |
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