CN218350919U - Intelligent RFID access control system - Google Patents
Intelligent RFID access control system Download PDFInfo
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- CN218350919U CN218350919U CN202222080288.0U CN202222080288U CN218350919U CN 218350919 U CN218350919 U CN 218350919U CN 202222080288 U CN202222080288 U CN 202222080288U CN 218350919 U CN218350919 U CN 218350919U
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Abstract
The utility model relates to an intelligent entrance guard technical field, intelligent RFID access control system is proposed, including resistance R10, resistance R11, resistance R12, resistance R13, comparator U7, triode Q4, triode Q5 and relay U8, resistance R10's first end is used for connecting the battery, resistance R12's first end is used for connecting commercial power DC power supply, comparator U7's homophase input is connected to resistance R10's second end, comparator U7's inverting input is connected to resistance R10's inverting input, triode Q4's base is connected to comparator U7's output, triode Q4's base is connected to triode Q4's projecting pole, relay U8's input is connected to triode Q5's collecting electrode, commercial power DC power supply is connected to relay U8's normally closed end, the battery is connected to relay U8's the beginning, relay U8's common port connection power module's input. Through the technical scheme, the working of the access control system is not influenced by power failure or power grid faults, and the working reliability of the access control system is ensured.
Description
Technical Field
The utility model relates to an intelligent entrance guard technical field, it is specific, relate to intelligent RFID access control system.
Background
With the development of automatic control technology, computer technology and communication technology, the intelligent construction of buildings and communities has been developed greatly, and in recent years, the buildings and communities built on a large scale are equipped with intelligent security systems of different levels. The RIFD technology is mainly and mostly applied to access control systems, namely, the access control system reads an electronic tag and then confirms the authority and controls a gate. Because the RFID entrance guard is at work, no matter the RFID entrance guard reads the card or controls the entrance guard, the power supply is needed, and the smooth operation can be ensured. A lot of current RFID entrance guards are direct from the electric wire netting power supply, when having a power failure, can't normally work, cause the problem that can't open the door, have caused a lot of inconveniences to people's life.
SUMMERY OF THE UTILITY MODEL
The utility model provides an intelligent RFID access control system has solved the RFID entrance guard among the prior art when having a power failure, can't normally work, causes the problem that can't open the door.
The technical scheme of the utility model as follows:
the intelligent RFID access control system comprises an identification module, a control module, an execution module and a power supply module, wherein the identification module and the execution module are connected with the control module, the identification module is used for identifying an IC card, the execution module is used for opening a door lock, the power supply module is used for supplying power to the access control system,
further, still including the power supply switching module, the power supply switching module includes resistance R10, resistance R11, resistance R12, resistance R13, comparator U7, triode Q4, triode Q5 and relay U8, resistance R10's first end is used for connecting the battery, resistance R10's second end passes through resistance R11 ground connection, resistance R12's first end is used for connecting commercial power DC power supply, resistance R12's second end passes through resistance R13 ground connection, resistance R10's second end is connected comparator U7's in-phase input end, resistance R10's inverting input end is connected comparator U7's inverting input end, comparator U7's output is connected triode Q4's base, triode Q4's collecting electrode connects the battery, triode Q4's projecting pole is connected triode Q5's base, triode Q5's projecting pole ground connection, triode Q5's collecting electrode is connected relay U8's first input end, the battery is connected to U8's second input end, relay U8's normally closed end DC power supply, relay U8's normally closed end connection commercial power supply connects the common connection relay U8's the common start input end relay U8 the relay U connection.
As a further technical scheme, the power supply switching module further comprises an indicator light LED1, the indicator light LED1 is connected in series between a collector of the triode Q4 and the storage battery, and the conduction direction of the indicator light LED1 is directed to the triode Q4 by the storage battery.
As a further technical scheme, the execution module includes phase inverter U4, triode Q2, triode Q3 and solenoid valve U6, phase inverter U4's input is connected control module, phase inverter U4's output passes through resistance R9 and connects triode Q2's base, triode Q2's collecting electrode passes through resistance R14 and connects the VCC power, triode Q2's projecting pole is connected triode Q3's base, triode Q3's projecting pole ground connection, triode Q3's collecting electrode is connected solenoid valve U6's first input end, the VCC power is connected to solenoid valve U6's second input.
As a further technical scheme, the execution module further comprises a diode D1, the anode of the diode D1 is connected with the collector of the triode Q3, and the cathode of the diode D1 is connected with a VCC power supply.
As a further technical solution, the identification module includes a radio frequency chip IC1, an inductor L2, an inductor L3, an inductor L4, a capacitor C12, a capacitor C17, a capacitor C9, a resistor R17, and a resistor R18, the radio frequency chip IC1 is connected to the control module, a first sending end of the radio frequency chip IC1 is connected to a first end of the capacitor C12 through the inductor L1, a second end of the capacitor C12 is connected to a first end of the inductor L3, a second end of the inductor L3 is connected to a first end of the inductor L4, a second sending end of the radio frequency chip IC1 is connected to a first end of the capacitor C17 through the inductor L2, the second end of the capacitor C17 is connected with the second end of the inductor L4, the first end of the capacitor C12 is connected with the first end of the capacitor C17 sequentially through a capacitor C10 and a capacitor C11, the second end of the capacitor C12 is connected with the second end of the capacitor C17 sequentially through a capacitor C14 and a capacitor C13, the second end of the capacitor C12 is connected with the second end of the capacitor C17 sequentially through a capacitor C16 and a capacitor C15, the first end of the resistor R17 is connected with the VMID end of the radio frequency chip IC1, the second end of the resistor R17 is connected with the second end of the capacitor C12 sequentially through a resistor R18 and a capacitor C9, and the second end of the resistor R17 is connected with the receiving end of the radio frequency chip IC 1.
The utility model discloses a theory of operation and beneficial effect do:
the utility model discloses in, the partial pressure signal input of battery to comparator U7's non inverting input end is through resistance R10 and resistance R11, as reference voltage, compares with commercial power DC power supply's partial pressure signal input end to comparator U7's inverting input end through resistance R12 and resistance R13. When no power failure occurs, the comparator U7 outputs a low level signal, the triode Q4 and the triode Q5 are not conducted, the common end of the relay U8 is communicated with the normally closed end, and a mains supply direct current power supply supplies power to the power supply module so as to supply power to the access control system; when power is off, the comparator U7 outputs a high level signal, the triode Q4 and the triode Q5 are conducted, the relay U8 acts, the public end is communicated with the normally open end, and the storage battery supplies power to the power supply module, so that power is supplied to the access control system. Through the power supply switching module, the work of the access control system is not affected by power failure or power grid faults, and the working reliability of the access control system is ensured.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a circuit diagram of a power supply switching module according to the present invention;
FIG. 2 is a circuit diagram of an execution module according to the present invention;
fig. 3 is a circuit diagram of the middle identification module of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive work, are related to the scope of protection of the present invention.
Example 1
The embodiment provides an intelligent RFID access control system, which comprises an identification module, a control module, an execution module and a power module, wherein the identification module and the execution module are all connected with the control module, the identification module is used for identifying an IC card, the execution module is used for opening a door lock, and the power module is used for supplying power for the access control system.
As shown in fig. 1, the power supply switching module further includes a power supply switching module, the power supply switching module includes a resistor R10, a resistor R11, a resistor R12, a resistor R13, a comparator U7, a transistor Q4, a transistor Q5 and a relay U8, a first end of the resistor R10 is used for connecting a storage battery, a second end of the resistor R10 is grounded through a resistor R11, a first end of the resistor R12 is used for connecting a mains dc power supply, a second end of the resistor R12 is grounded through a resistor R13, a second end of the resistor R10 is connected with a non-inverting input end of the comparator U7, an inverting input end of the resistor R10 is connected with an inverting input end of the comparator U7, an output end of the comparator U7 is connected with a base of the transistor Q4, a collector of the transistor Q4 is connected with the storage battery, an emitter of the transistor Q4 is connected with a base of the transistor Q5, an emitter of the transistor Q5 is grounded, a collector of the transistor Q5 is connected with a first input end of the relay U8, a second input end of the relay U8 is connected with the storage battery, a normally open end of the relay U8 is connected with a mains supply, a normally open end of the relay U8 is connected with a common input end of the relay.
In this embodiment, the voltage-divided signal of the storage battery is input to the non-inverting input terminal of the comparator U7 through the resistor R10 and the resistor R11, and is used as a reference voltage, and the voltage-divided signal input terminal of the commercial power dc power supply is compared with the inverting input terminal of the comparator U7 through the resistor R12 and the resistor R13. When power failure does not occur, the comparator U7 outputs a low level signal, the triode Q4 and the triode Q5 are not conducted, the common end of the relay U8 is communicated with the normally closed end, and a commercial power direct current power supply supplies power to the power supply module so as to supply power to the access control system; when power is off, the comparator U7 outputs a high level signal, the triode Q4 and the triode Q5 are conducted, the relay U8 acts, the public end is communicated with the normally open end, and the storage battery supplies power to the power supply module, so that power is supplied to the access control system.
In this embodiment, the commercial power dc power supply is obtained by stepping down and rectifying the commercial power, and the commercial power dc power supply and the storage battery are all converted into voltages of 3V, 5V and 12V through the power supply module to supply power to the whole access control system. Triode Q4 and triode Q5 are supplied power by the battery, avoid under the power failure condition, influence the normal work of power supply switching module.
Further, the power supply switching module further comprises an indicator light LED1, the indicator light LED1 is connected between a collector of the triode Q4 and the storage battery in series, and the conduction direction of the indicator light LED1 is directed to the triode Q4 by the storage battery. When power failure or power grid failure occurs, the state of power supply by the storage battery is switched, the triode Q4 drives the indicator lamp LED1 to be conducted when being conducted, and the indicator lamp LED1 emits light to indicate the current power supply state.
As a further technical solution, it is proposed that,
as shown in fig. 2, the execution module includes phase inverter U4, triode Q2, triode Q3 and solenoid valve U6, the control module is connected to phase inverter U4's input, triode Q2's base is connected through resistance R9 to phase inverter U4's output, triode Q2's collecting electrode passes through resistance R14 and connects the VCC power, triode Q3's base is connected to triode Q2's emitting electrode, triode Q3's emitting electrode ground connection, solenoid valve U6's first input is connected to triode Q3's collecting electrode, the VCC power is connected to solenoid valve U6's second input. The execution module further comprises a diode D1, the anode of the diode D1 is connected with the collector of the triode Q3, and the cathode of the diode D1 is connected with the VCC power supply.
In this embodiment, after the identification module identifies the corresponding IC card, the control module sends a low-level signal to the inverter U4, and drives the transistor Q2 and the transistor Q3 to be turned on after passing through the inverter U4, and further drives the solenoid valve U6 to operate, thereby opening the door lock. The inverter U4 increases the driving capability of the control unit, the resistor R14 is used for preventing the transistor Q2 from being broken down and damaged, and the diode D1 is used for conducting away the collector current of the transistor Q3 so as to avoid charge accumulation and multi-loss of the transistor Q3.
As a further technical solution, the method comprises the following steps,
as shown in fig. 3, the identification module includes a radio frequency chip IC1, an inductor L2, an inductor L3, an inductor L4, a capacitor C12, a capacitor C17, a capacitor C9, a resistor R17, and a resistor R18, the radio frequency chip IC1 is connected to the control module, a first transmitting end of the radio frequency chip IC1 is connected to a first end of the capacitor C12 through the inductor L1, a second end of the capacitor C12 is connected to a first end of the inductor L3, a second end of the inductor L3 is connected to a first end of the inductor L4, a second transmitting end of the radio frequency chip IC1 is connected to a first end of the capacitor C17 through the inductor L2, a second end of the capacitor C17 is connected to a second end of the inductor L4, a first end of the capacitor C12 is connected to a first end of the capacitor C17 through the capacitors C10 and C11 in sequence, a second end of the capacitor C12 is connected to a second end of the capacitor C17 through the capacitors C14 and C13 in sequence, a second end of the capacitor C16 and a second end of the capacitor C15 are connected to a second end of the capacitor C17 through the capacitor C17 in sequence, a first end of the resistor R1 and a receiving end of the capacitor C17 are connected to a receiving end of the radio frequency chip IC1 through the capacitor C17 in sequence.
In this embodiment, the capacitor C16, the capacitor C15, the inductor L3, and the inductor L4 are used as antenna matching parts, the inductor L3 and the inductor L4 are antenna coils, and the inductor L1, the inductors L2 and C10, the capacitor C11, the capacitor C12, the capacitor C13, the capacitor C14, and the capacitor C17 form EMC filtering of the whole antenna. The radio frequency chip IC1 and the antenna part realize the identification of the IC card.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the present invention.
Claims (5)
1. An intelligent RFID access control system comprises an identification module, a control module, an execution module and a power module, wherein the identification module and the execution module are both connected with the control module, the identification module is used for identifying an IC card, the execution module is used for opening a door lock, the power module is used for supplying power for the access control system,
still include the power supply switching module, the power supply switching module includes resistance R10, resistance R11, resistance R12, resistance R13, comparator U7, triode Q4, triode Q5 and relay U8, resistance R10's first end is used for connecting the battery, resistance R10's second end passes through resistance R11 ground connection, resistance R12's first end is used for connecting commercial power DC power supply, resistance R12's second end passes through resistance R13 ground connection, resistance R10's second end is connected comparator U7's in-phase input end, resistance R10's inverting input end is connected comparator U7's inverting input end, comparator U7's output is connected triode Q4's base, triode Q4's collecting electrode is connected the battery, triode Q4's projecting pole is connected triode Q5's base, triode Q5's projecting pole ground connection, relay Q5's collecting electrode is connected relay U8's first input end, the battery is connected to relay U8's second input end, commercial power supply is connected to relay U8's normal end, relay U8's normal terminal connection relay U8's common input end.
2. The intelligent RFID access control system according to claim 1, wherein the power supply switching module further comprises an indicator light LED1, the indicator light LED1 is connected in series between a collector of the triode Q4 and the storage battery, and the conduction direction of the indicator light LED1 is directed to the triode Q4 by the storage battery.
3. The intelligent RFID access control system of claim 1, wherein the execution module comprises a phase inverter U4, a triode Q2, a triode Q3 and a solenoid valve U6, the input end of the phase inverter U4 is connected with the control module, the output end of the phase inverter U4 is connected with the base of the triode Q2 through a resistor R9, the collector of the triode Q2 is connected with the VCC power supply through a resistor R14, the emitter of the triode Q2 is connected with the base of the triode Q3, the emitter of the triode Q3 is grounded, the collector of the triode Q3 is connected with the first input end of the solenoid valve U6, and the second input end of the solenoid valve U6 is connected with the VCC power supply.
4. The intelligent RFID access control system of claim 3, wherein the execution module further comprises a diode D1, the anode of the diode D1 is connected to the collector of the triode Q3, and the cathode of the diode D1 is connected to the VCC power supply.
5. The intelligent RFID access control system according to claim 1, wherein the identification module comprises a radio frequency chip IC1, an inductor L2, an inductor L3, an inductor L4, a capacitor C12, a capacitor C17, a capacitor C9, a resistor R17 and a resistor R18, the radio frequency chip IC1 is connected to the control module, a first transmitting end of the radio frequency chip IC1 is connected to a first end of the capacitor C12 through the inductor L1, a second end of the capacitor C12 is connected to a first end of the inductor L3, a second end of the inductor L3 is connected to a first end of the inductor L4, a second transmitting end of the radio frequency chip IC1 is connected to a first end of the capacitor C17 through the inductor L2, the second end of the capacitor C17 is connected with the second end of the inductor L4, the first end of the capacitor C12 is connected with the first end of the capacitor C17 sequentially through a capacitor C10 and a capacitor C11, the second end of the capacitor C12 is connected with the second end of the capacitor C17 sequentially through a capacitor C14 and a capacitor C13, the second end of the capacitor C12 is connected with the second end of the capacitor C17 sequentially through a capacitor C16 and a capacitor C15, the first end of the resistor R17 is connected with the VMID end of the radio-frequency chip IC1, the second end of the resistor R17 is connected with the second end of the capacitor C12 sequentially through the resistor R18 and the capacitor C9, and the second end of the resistor R17 is connected with the receiving end of the radio-frequency chip IC 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222080288.0U CN218350919U (en) | 2022-08-09 | 2022-08-09 | Intelligent RFID access control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222080288.0U CN218350919U (en) | 2022-08-09 | 2022-08-09 | Intelligent RFID access control system |
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| Publication Number | Publication Date |
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| CN218350919U true CN218350919U (en) | 2023-01-20 |
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| CN202222080288.0U Active CN218350919U (en) | 2022-08-09 | 2022-08-09 | Intelligent RFID access control system |
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