CN210605862U - Community access control system - Google Patents
Community access control system Download PDFInfo
- Publication number
- CN210605862U CN210605862U CN201922285774.4U CN201922285774U CN210605862U CN 210605862 U CN210605862 U CN 210605862U CN 201922285774 U CN201922285774 U CN 201922285774U CN 210605862 U CN210605862 U CN 210605862U
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- operational amplifier
- door lock
- resistor
- capacitor
- remote
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Abstract
The utility model discloses a residential area gate control system, which comprises an intelligent door lock and a remote control terminal arranged in a user room, wherein the intelligent door lock comprises a door lock controller and a wireless signal receiver, the remote control terminal comprises a touch screen, the touch screen is connected with the remote controller through a serial port, the remote controller is used for reading a control command input by the touch screen, and sending the control command signal into a wireless signal transmitter after being sequentially sent into an isolation circuit, a differential amplification circuit and an LC resonance circuit for processing, the wireless transmitter and the wireless receiver form remote communication and remotely send the control command to the door lock controller, the wireless signal receiver on the intelligent door lock sends the control command into the door lock controller after receiving the control command, the door lock controller drives the door lock to carry out corresponding opening and closing operations, thereby realizing remote opening of the door, the utility model well filters out external clutter interference, the method has good anti-interference performance, and improves the stability and accuracy of the control command signal.
Description
Technical Field
The utility model relates to an intelligence access control technical field especially relates to district access control system.
Background
The current intelligent access control system is that the owner usually adopts the door card to get in, and the visitor calls the owner through the visual intercom and opens the door remotely. When a visitor calls the owner to open the door, the owner needs to issue a door opening instruction through a specific remote control terminal, so that the goal of remotely opening the door for the visitor is achieved. The remote control terminal realizes the emission of the instruction by means of a wireless communication technology, the closure is stronger in some buildings, the attenuation degree of a wireless instruction signal is higher, wireless devices adopting spread spectrum and other broadband modulation technologies such as a mobile phone, a wireless remote controller, a wireless router, Bluetooth and the Internet of things can generate out-of-band emission and stray emission in a very wide frequency range outside a carrier frequency, and the electromagnetic clutters can interfere the emission of the wireless instruction to cause the remote door opening failure.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention is directed to a residential area access control system.
The technical scheme for solving the problem is as follows: district access control system, including intelligent lock and the remote control terminal of setting in the user's room, the intelligent lock includes lock controller and radio signal receiver, remote control terminal includes the touch-control screen, the touch-control screen passes through serial ports connection remote control ware, remote control ware is used for reading the control command of touch-control screen input to send this control command signal into in isolation circuit, difference amplifier circuit and LC resonance circuit in proper order and handle the back and send into radio signal transmitter, radio signal transmitter with radio signal receiver forms remote communication to arrive control command remote sending in the lock controller.
Preferably, the isolation circuit includes an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to the command output terminal of the remote controller, and an inverting input terminal of the operational amplifier AR1 is connected to the output terminal of the operational amplifier AR1, one end of a capacitor C2, and the other end of a capacitor C2 through a capacitor C1.
Preferably, the differential amplifier circuit comprises operational amplifiers AR2 and AR3, a non-inverting input terminal of the operational amplifier AR2 is connected to the other end of the capacitor C2 and one end of the resistor RP1, the other end of the resistor RP1 is grounded, a sliding terminal of the resistor RP1 is connected to an inverting input terminal of the operational amplifier AR3 through the resistor R4, an inverting input terminal of the operational amplifier AR2 is connected to an output terminal of the operational amplifier AR2 and one end of the resistor R2 through the resistor R1, the other end of the resistor R2 is connected to one end of the resistor R3 and one end of the capacitor C3, the other end of the capacitor C3 is grounded, and the other end of the resistor R3 is connected to a non-inverting input terminal of the operational amplifier AR 3.
Preferably, the LC resonant circuit includes a transistor VT1, a base of the transistor VT1 is connected to an output terminal of the operational amplifier AR3, a collector of the transistor VT1 is connected to a +12V power supply through a resistor R5, an emitter of the transistor VT1 is connected to one end of an inductor L1 and one end of a capacitor C5 through a resistor R6, the other end of the inductor L1 is connected to one end of the capacitor C6 and an input terminal of the wireless signal transmitter, and the other ends of the capacitors C5 and C6 are grounded.
Through the technical scheme, the beneficial effects of the utility model are that:
1. a user issues a control instruction through a function key on a touch screen of the remote control terminal, and the remote controller processes the control instruction, outputs the control instruction to the isolation circuit, adds a carrier wave to the control instruction and then sends the control instruction to the isolation circuit, so that the stability of the output of a command signal of the remote controller is ensured;
2. the differential amplification circuit amplifies the control command signal by using a differential amplification principle, so that the anti-interference capability of the system is improved, meanwhile, the external clutter interference is well filtered by using a band-pass filter principle in the amplification process, and the accuracy of the control command signal is improved;
and 3, the LC resonance circuit amplifies the output signal of the operational amplifier AR3 by using the emitter follower principle, and then further filters by using the LC parallel resonance principle, so that the precision of the control command signal is greatly improved.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
District access control system, including intelligent lock and the remote control terminal of setting in the user's room, the intelligent lock includes lock controller and radio signal receiver, remote control terminal includes the touch-control screen, the touch-control screen passes through serial ports connection remote control ware, remote control ware is used for reading the control command of touch-control screen input, and send this control command signal into isolating circuit in proper order, send into in radio signal transmitter E1 after difference amplifier circuit and LC resonance circuit handle, radio signal transmitter forms remote communication with radio signal receiver, and with control command remote transmission to the lock controller in.
A user issues a control instruction through a function key on a touch screen of the remote control terminal, and the remote controller processes the control instruction and outputs the control instruction to the isolation circuit. The isolation circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the instruction output end of the remote controller, the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1, one end of a capacitor C2 and the other end of a capacitor C2 through a capacitor C1. The operational amplifier AR1 outputs and isolates the control command signal by using the voltage follower principle, thereby ensuring the stability of the command signal output of the remote controller.
The differential amplifying circuit comprises operational amplifiers AR2 and AR3, wherein the non-inverting input end of the operational amplifier AR2 is connected with the other end of the capacitor C2 and one end of the rheostat RP1, the other end of the rheostat RP1 is grounded, the sliding end of the rheostat RP1 is connected with the inverting input end of the operational amplifier AR3 through the resistor R4, the inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR2 and one end of the resistor R2 through the resistor R1, the other end of the resistor R2 is connected with one ends of the resistor R3 and the capacitor C3, the other end of the capacitor C3 is grounded, and the other end of the resistor R3 is connected with the non-inverting input end of the operational amplifier.
The output signal of the operational amplifier AR1 is coupled by a capacitor C2 and then sent to the differential amplification circuit in two paths for processing, wherein one path is sent to the non-inverting input terminal of the operational amplifier AR2, and the other path is sent to the inverting input terminal of the operational amplifier AR3 after being shunted by a rheostat RP1, so that differential mode signals are formed at the two input terminals of the operational amplifier AR3, the amplification noise can be effectively eliminated by utilizing the differential amplification principle, and the anti-interference performance is good. In order to prevent external electromagnetic noise interference, the resistors R2 and R3 and the capacitors C3 and C4 form second-order band-pass filtering to perform frequency selection on an output signal of the operational amplifier AR2, wherein the center frequency of the output signal is consistent with the frequency of a control command signal, so that the external noise interference is well filtered, and the accuracy of the control command signal is improved.
The LC resonance circuit comprises a triode VT1, the base electrode of the triode VT1 is connected with the output end of the operational amplifier AR3, the collector electrode of the triode VT1 is connected with a +12V power supply through a resistor R5, the emitter electrode of the triode VT1 is connected with one end of an inductor L1 and one end of a capacitor C5 through a resistor R6, the other end of the inductor L1 is connected with one end of the capacitor C6 and the input end of the wireless signal transmitter E1, and the other ends of the capacitors C5 and C6 are grounded.
The triode VT1 forms an emitter follower at the output end of the operational amplifier AR3, amplifies the power of the control command signal, and then sends the amplified power to an LC parallel resonance circuit formed by an inductor L1 and capacitors C5 and C6 for further filtering, so that the precision of the control command signal is greatly improved, and finally, the control command is remotely transmitted by a wireless signal transmitter E1.
The utility model discloses when specifically using, the user issues control command through remote control terminal, and remote controller sends this control command into isolation circuit after adding the carrier wave, guarantees remote controller command signal output's stability. Then the differential amplification circuit amplifies the control command signal by using a differential amplification principle, so that the anti-interference capability of the system is improved, meanwhile, the external clutter interference is well filtered by using a band-pass filter principle in the amplification process, and the accuracy of the control command signal is improved. And finally, after further power amplification and frequency selection through the LC resonance circuit, the control command is sent to the wireless signal transmitter E1 to be remotely transmitted. And the wireless signal receiver on the intelligent door lock receives the control instruction and then sends the control instruction to the door lock controller, and the door lock controller drives the door lock to perform corresponding opening and closing operations, so that remote door opening is realized.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. District access control system, including intelligent lock and the remote control terminal of setting in the user's room, its characterized in that: the intelligent door lock comprises a door lock controller and a wireless signal receiver, the remote control terminal comprises a touch screen, the touch screen is connected with the remote controller through a serial port, the remote controller is used for reading a control instruction input by the touch screen and sending the control instruction signal into the isolation circuit, the differential amplification circuit and the LC resonance circuit in sequence to be processed and then sent into the wireless signal transmitter, and the wireless signal transmitter and the wireless signal receiver form remote communication and remotely send the control instruction into the door lock controller.
2. The residential access control system of claim 1, wherein: the isolation circuit comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with the instruction output end of the remote controller, the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1, one end of a capacitor C2 and the other end of a capacitor C2 through a capacitor C1.
3. The cell gate inhibition system according to claim 2, wherein: the differential amplifying circuit comprises operational amplifiers AR2 and AR3, wherein the non-inverting input end of the operational amplifier AR2 is connected with the other end of a capacitor C2 and one end of a rheostat RP1, the other end of the rheostat RP1 is grounded, the sliding end of the rheostat RP1 is connected with the inverting input end of the operational amplifier AR3 through a resistor R4, the inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR2 and one end of a resistor R2 through a resistor R1, the other end of the resistor R2 is connected with one ends of a resistor R3 and a capacitor C3, the other end of the capacitor C3 is grounded, and the other end of the resistor R3 is connected with the non-inverting input end of the operational amplifier AR.
4. The residential access control system of claim 3, wherein: the LC resonance circuit comprises a triode VT1, the base electrode of the triode VT1 is connected with the output end of an operational amplifier AR3, the collector electrode of the triode VT1 is connected with a +12V power supply through a resistor R5, the emitter electrode of the triode VT1 is connected with one end of an inductor L1 and one end of a capacitor C5 through a resistor R6, the other end of the inductor L1 is connected with one end of the capacitor C6 and the input end of the wireless signal transmitter, and the other ends of the capacitors C5 and C6 are grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922285774.4U CN210605862U (en) | 2019-12-18 | 2019-12-18 | Community access control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922285774.4U CN210605862U (en) | 2019-12-18 | 2019-12-18 | Community access control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210605862U true CN210605862U (en) | 2020-05-22 |
Family
ID=70696105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922285774.4U Expired - Fee Related CN210605862U (en) | 2019-12-18 | 2019-12-18 | Community access control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210605862U (en) |
-
2019
- 2019-12-18 CN CN201922285774.4U patent/CN210605862U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 Termination date: 20201218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |