CN103971438A - Intelligent lock system based on high-frequency antenna feature judgment - Google Patents
Intelligent lock system based on high-frequency antenna feature judgment Download PDFInfo
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- CN103971438A CN103971438A CN201410226523.8A CN201410226523A CN103971438A CN 103971438 A CN103971438 A CN 103971438A CN 201410226523 A CN201410226523 A CN 201410226523A CN 103971438 A CN103971438 A CN 103971438A
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Abstract
The invention relates to an intelligent lock system based on high-frequency antenna feature judgment, which intelligent a lock base station and an intelligent key, wherein the intelligent lock base station is installed on a door; the intelligent lock base station comprises a base station main control module, a trigger module, a low-frequency transmission module, a low-frequency transmission antenna, a high-frequency receiving module, a high-frequency receiving antenna and a motor drive module; the intelligent key comprises a key main control module, a low-frequency receiving module, a low-frequency receiving antenna, a high-frequency transmission module and a high-frequency transmission antenna; the high-frequency receiving antenna is a hemispherical radiating antenna which is used for receiving signals outside the door and inhibiting signals inside the door; and the radiation range of the high-frequency receiving antenna is outside the door. The system can effectively distinguish whether the key is inside the door or outside the door, and has high safety.
Description
Technical field
The present invention relates to a kind of intelligent lock system, especially intelligent electronic lock.
Background technology
PKE is the abbreviation of English Passive keyless entry, and Chinese is generally translated into passive keyless access system.The original intention of this technical design is to make user only need carry an electron key, does not need by just can target approach system.Different from the one-way communication of RKE, what PKE applied is the principle of two-way communication, verifies that the identity of electron key is to improve security by radiofrequency signal.
The course of work of conventional P KE smart lock is:
1, wake up: in the time that user carries Intelligent key and occurs the sensing range of smart lock base station, low frequency signal is sent in smart lock base station, if the data that in this signal and Intelligent key, the mark of storage wakes up match, key will be waken up.In Intelligent key, be designed with " waking up " monitoring modular (low frequency wake-up antenna and low-frequency wakening module), can ensure Intelligent key for a long time after low power consumpting state is only waking up main control module just enter normal work, thereby effectively extend the service time of battery.In Intelligent key, conventionally can use three-dimensional omni-directional monopole antenna to guarantee to receive under the different attitude of key " waking up " signal.
2, checking: after Intelligent key is waken up, the ID data that its meeting calculates an encryption according to certain algorithm send it back smart lock base station by high-frequency signal, smart lock base station high frequency receiving antenna and receiver module receive the control module that sends to it after data, control module is decrypted the encryption ID receiving according to corresponding algorithm, if the data after deciphering and the success of pre-stored Data Matching, will opening door lock.
Fig. 1 is a typical PKE intelligent lock system.Its design proposal is smart lock base station end of design and corresponding Intelligent key.Intelligent base station end adopts a microcontroller module as main control module 11, this microcontroller can be 8 single-chip microcomputers (as 8051) that performance is lower, also can be 16 or 32 bit processors (as ARM) that performance is higher, possess program capability and there is the feature of low-power consumption.Developer realizes the basic function of smart lock base station by developing corresponding software.
The pin of main control module 11 connects trigger module 12.The effect of trigger module be perception intelligent lock system by external trigger, wake up in the main control module of low power consumpting state and enter duty.Trigger module has multiple embodiment: 1, adopt the mode of mechanical key, in the time that user pushes button, level signal is transmitted to main control module 11, and main control module pin produces and interrupts waken system; 2, adopt the mode of touch key-press, by the electric capacity of induction user's human body or hand and touch keyboard generation, initiating system interrupts; 3, adopt the closely mode of induction, when user's human body or hand near time initiating system interrupt; 4,, by the mode of the induction such as infrared, produce system break.
Low frequency sending module 13 is modules that produce low-frequency wireless signal, and typical Frequency is 125KHz.Conventionally produce a square wave that frequency is 125K by chip internal PWM pin, then pass through this carrier modulation of triode control to low-frequency antenna, triode conducting and close and will realize this reference carrier on antenna and not on antenna, thus realize the transmission of signal 0 and 1.Coded system adopts Manchester's cde conventionally.Low-frequency antenna is made up of resistance in parallel, electric capacity and inductance.In order to reach optimum low frequency receiving sensitivity, inductance and capacitor resonance frequency will reach 125KHz.
High frequency receiver module 15 adopts traditional superhet or superregenerative method for designing, and dominant frequency designs in civilian open radio bands such as 315MHz, 433MHz, 868MHz, 965MHz and 2.4GHz.The present embodiment suggestion is bought ready-made wireless module and is reduced design difficulty, and the GW-R10DL Low-voltage Low-power superheterodyne reception module that wireless good enterprise provides taking Shenzhen is here example principle of specification, and the dimensional drawing of its module and schematic diagram are as shown in Figure 3.Its adopts SWA local oscillator, stable performance, and serviceability temperature is in extensive range, and supply voltage is 3V, and receiving power consumption is only 1mA, applicable to the communication of each frequency of 250-450MHz.Receiving antenna adopts the simple oscialltor antenna of 1.4 wavelength.
The main control module of smart lock base station is after certification is passed through, and motor control module 17 transmission level signals are to motor, and drive motor is unblanked.Typical motor drive ic adopts L9110, and it is to be the two passage push-pull type power amplification special IC devices of controlling and drive motor designs, and discrete circuit is integrated among monolithic IC, makes peripheral components cost, and whole aircraft reliability improves.This chip has the input of the compatible level of two TTL/CMOS, has good anti-interference; Forward and reverse motion of two output terminal energy direct-driving motors, it has larger current driving ability, and every passage capable of being is by the persistent current of 750～800mA, and peak point current ability can reach 1.5～2.0A; It has lower output saturation pressure drop simultaneously.
The low frequency receiver module 22 of Intelligent key connects low-frequency antenna 23, and in order to obtain good reception, low-frequency antenna adopts 3 axle low-frequency antennas conventionally.Typical low frequency receiver module adopts the analog front-end module (AFE) of PIC16F639 inside, and 3 antennas connect pin and are respectively LX, LY, LZ.By connecting 3 antennas that point to respectively x axle, y axle, z axle, Intelligent key can receive the signal from any direction at any time, thereby reduces the possibility that is caused dropout by the directivity of antenna.In this system, the low-frequency antenna 23 of 3 directions adopts the integrated antenna module of PREMO company design, and this Anneta module volume is little, precision is high, and inductance value configures in the time dispatching from the factory, and only need to coordinate the electric capacity of respective channel just can use.
Intelligent key high frequency sending module 24 adopts the high frequency transtation mission circuit with smart lock base station respective frequencies.Fig. 4 has provided a former road figure of typical high frequency transtation mission circuit, it produces a pwm signal by main control module PIC16F639 and links together and form a harmonic oscillation circuit with a SAW (Surface Acoustic Wave) filter (SAW), is the SAW (Surface Acoustic Wave) filter of a 433MHz in embodiment.
Fig. 4 has provided the workflow of a typical PKE smart lock base station.In the normal state, smart lock base station is in low power consumpting state.When external trigger module receives after the signal of human body sensing, produce look-at-me and wake the main control module of smart lock base station up.Main control module is waken up rear transmission low frequency wake-up signal to Intelligent key, and waits for the high-frequency I D signal that Intelligent key returns.If received in official hour after high-frequency signal, the ID receiving is decoded, then with system in the legal key ID that stores compare, if more legal, unblank; If ID is more illegal, do not unblank.Waiting in the process of high frequency, if do not receive at the appointed time effective ID signal (in low frequency overlay area without key), retransmit.If the number of times of retransmitting has reached maximum number of retransmissions, enter low power consumpting state.
Fig. 5 shows the workflow of Intelligent key.Intelligent key in low frequency induction region senses after wake-up signal, exits, and check that whether the low frequency wake-up signal sending over is legal from low power consumpting state.If the low frequency signal of current reception is legal, send by high-frequency model the ID encrypting; If the low frequency signal of current reception is illegal, do not send the ID of encryption.Intelligent key is only operated under normal mode after being waken up, and at ordinary times all in low power consumpting state, is greater than 1 year service time under button cell work so it can be realized.
In the whole course of work of PKE, there are 2 kinds of wireless signals of high and low frequency, for the efficiency that improves communication is conventionally to all high gains of design comparison of sending and receiving antenna.The radiation scope of this sending and receiving antenna of 2 types is (spherical) of omnidirectional normally, that is to say that receiving antenna can successfully receive the high-frequency signal from all directions in the sphere taking antenna for base station as radius.For communication system, the effect of such omnidirectional antenna sending and receiving is best.But in intelligent lock system, this omnidirectional feature of base station high and low frequency antenna but can cause the radiation field that also has to receive signal in the inside of door, this will cause the key in door also can receive wake-up signal, and the high-frequency signal that the Intelligent key after being waken up in door sends also can be received by smart lock antenna for base station.This use to smart lock has proposed the problem of security.Also have at present by multiple low frequency transmitting antennas and send low frequency signal, key judges the own distance from corresponding low-frequency antenna by judging the signal intensity of different low-frequency antennas transmissions, thereby judges the position of oneself.But in intelligent lock system, like this due to the distance between antenna can not design very near, directly cause the accuracy requirement of key judgement very harsh, be difficult to be applied in practice.
Summary of the invention
For overcome existing intelligent lock system cannot effectively distinguish key be positioned at Men Nei still outdoors, the poor deficiency of security, the invention provides a kind of effective differentiation key be positioned at Men Nei still outdoors, the good intelligent lock system of differentiating based on high frequency antenna feature of security.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of intelligent lock system of differentiating based on high frequency antenna feature, comprise smart lock base station and Intelligent key, described smart lock base station is arranged on door, wherein, described smart lock base station comprises base station main control module, trigger module, low frequency sending module and low frequency transmitting antenna, high frequency receiver module and high frequency receiving antenna and motor drive module; Described Intelligent key comprises key main control module, low frequency receiver module and low frequency receiving antenna, high frequency sending module and high frequency transmitting antenna; Described high frequency receiving antenna is in order to receiving gate external signal and suppresses the hemisphere face radiating antenna of signal in door, and the radiation scope of described high frequency receiving antenna is for outdoors.
Further, described high frequency receiving antenna is PCB dipole antenna.Certainly, also can adopt the antenna of other hemisphere face radiation.
Further again, in described smart lock base station, described trigger module receives user and triggers after unlocking signal, wake base station main control module up and enter communications status, base station master control module controls low frequency sending module sends wireless low frequency wake-up signal by low frequency transmitting antenna, and high frequency receiver module is waited for receiving by high frequency receiving antenna and is positioned at the high-frequency wireless signals that Intelligent key outdoors returns;
In described Intelligent key, described low frequency receiver module and low frequency receiving antenna are received after wireless low frequency wake-up signal, wake described key main control module up, control high frequency sending module and send wireless high-frequency ID signal to smart lock base station by high frequency transmitting antenna;
The high frequency receiver module of smart lock base station receives after the wireless high-frequency ID signal that Intelligent key returns by high frequency receiving antenna, and ID is mated to certification, and certification is by rear control motor drive module unlatching smart lock.
If smart lock is not received legal wireless high-frequency ID signal within the time of setting, enter low power consumpting state, wait for and being again waken up.
Technical conceive of the present invention is: the radiation direction of the high frequency receiving antenna to smart lock base station is optimized, and the antenna of the uniform radiation of script omnidirectional is optimized for to hemisphere face radiation, i.e. the radiation of antenna face remains unchanged, and the radiation at the back side suppresses as far as possible.Like this antenna be installed to door upper after, door positive (outdoors) can normally receive signal, and behind the door (in door) because its radiation has been suppressed as much as possible, so just accomplished cannot unblank in door.Low frequency signal is not suppressed in this scheme, so key still can be waken up in door in this scheme, but cannot unblank.
Beneficial effect of the present invention is mainly manifested in: effectively distinguish key be positioned at Men Nei still outdoors, security is good.
Brief description of the drawings
Fig. 1 is the basic functional block diagram of smart lock.
Fig. 2 is motor-drive circuit example.
Fig. 3 is size and the schematic diagram of high frequency receiver module.
Fig. 4 is the workflow diagram of traditional intelligence lock base station.
Fig. 5 is the workflow of traditional intelligence key.
Fig. 6 is the antenna pattern of the dipole PCB antenna of asymmetric radiation, wherein, (a) is xz plane, is (b) yz plane.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1～Fig. 6, a kind of intelligent lock system of differentiating based on high frequency antenna feature, comprise smart lock base station and Intelligent key, smart lock base station comprises base station main control module 11, trigger module 12, low frequency sending module 13 and low-frequency antenna 14, high frequency receiver module 15 and high frequency receiving antenna 16 and motor drive module 17; Intelligent key comprises that key main control module 21, low frequency receiver module 22 and low frequency sky receive line 23, high frequency sending module 24 and high frequency transmitting antenna 25;
Described high frequency receiving antenna 16 is in order to receiving gate external signal and suppresses the hemisphere face radiating antenna of signal in door, and the radiation scope of described high frequency receiving antenna 16 is for outdoors.
Further, described high frequency receiving antenna 16 is PCB dipole antenna.Certainly, also can adopt the antenna of other hemisphere face radiation.
The trigger module 17 of smart lock base station receives user and triggers after unlocking signal, wake base station main control module 11 up and enter communications status, base station main control module 11 is controlled low frequency sending module 13 and is sent wireless low frequency wake-up signal by low frequency transmitting antenna 14, and the high frequency receiver module 15 of smart lock is waited for and received the high-frequency wireless signals that Intelligent key returns.The low-frequency antenna 23 of Intelligent key and low frequency receiver module 22 are received after wireless low frequency wake-up signal, wake the main control module 21 of key up, and the main control module 21 of key is controlled high frequency sending module and sent wireless high-frequency ID signal to smart lock base station by high frequency antenna 24.The high frequency receiver module 15 of smart lock base station receives after the high-frequency signal that Intelligent key returns by high frequency antenna 16, and ID is mated to certification, and certification is by rear control motor drive module unlatching smart lock.
Smart lock base station is triggered and sends after low frequency wake-up signal, if do not receive the high-frequency signal that Intelligent key returns in certain time interval, enters low power consumpting state.
The high frequency receiving antenna 16 of smart lock base station is hemisphere face radiating antenna, adopts asymmetrical radiation mode, and the ability that receives high-frequency signal towards direction is outdoors strong, a little less than receiving the ability of high-frequency signal towards direction in door.
By adjusting the transmitted power of Intelligent key, guarantee smart lock base station cannot receiving gate in the high-frequency signal that sends of Intelligent key maybe cannot receive interior a certain specific range signal of Intelligent key transmission in addition, the signal of Intelligent key transmission in certain distance outdoors all can successfully be received by smart lock base station.
The signal capabilities that receives an interior Intelligent key due to the high frequency receiving antenna of asymmetric radiation is very weak, smart lock base station is by arranging a threshold value that receives high-frequency signal strength, the signal that exceedes this threshold value is thought, in normal signal outdoors, to think the invalid signals sending in door lower than the signal of this threshold value.
In the present embodiment, adopt the smart lock base station embodiment of asymmetric radiation high frequency antenna, specific embodiment is as follows: the high frequency receiving antenna of having optimized traditional PKE smart lock base station.The high frequency receiving antenna of traditional intelligence lock base station can receive the signals in 360 degree spatial dimensions centered by antenna, and this just makes smart lock base station can be in door receive the high-frequency signal of key transmission in door in a big way.The present embodiment is optimized the radiation direction of antenna, and the ability of door frontal received radiation intensity is identical with traditional high frequency antenna, but in door, the ability of direction received radiation intensity is carried out the inhibition of maximum magnitude.Such antenna by make smart lock base station can not receiving gate in the signal that sends of key or the signal that can only receive key transmission in door in extremely short scope, thereby promoted the level of security of smart lock.Have this characteristic antenna and can adopt PCB dipole antenna, its antenna pattern as shown in Figure 6.The antenna of this class includes but are not limited to PCB dipole antenna, and any antenna with asymmetric radiation mode all belongs to by the protection domain of patent.
Claims (4)
1. an intelligent lock system of differentiating based on high frequency antenna feature, comprise smart lock base station and Intelligent key, described smart lock base station is arranged on door, wherein, described smart lock base station comprises base station main control module, trigger module, low frequency sending module and low frequency transmitting antenna, high frequency receiver module and high frequency receiving antenna and motor drive module; Described Intelligent key comprises key main control module, low frequency receiver module and low frequency receiving antenna, high frequency sending module and high frequency transmitting antenna; It is characterized in that: described high frequency receiving antenna is in order to receiving gate external signal and suppresses the hemisphere face radiating antenna of signal in door, the radiation scope of described high frequency receiving antenna is for outdoors.
2. the intelligent lock system of differentiating based on high frequency antenna feature as claimed in claim 1, is characterized in that: described high frequency receiving antenna is PCB dipole antenna.
3. the intelligent lock system of differentiating based on high frequency antenna feature as claimed in claim 1 or 2, it is characterized in that: in described smart lock base station, described trigger module receives user and triggers after unlocking signal, wake base station main control module up and enter communications status, base station master control module controls low frequency sending module sends wireless low frequency wake-up signal by low frequency transmitting antenna, and high frequency receiver module is waited for receiving by high frequency receiving antenna and is positioned at the high-frequency wireless signals that Intelligent key outdoors returns;
In described Intelligent key, described low frequency receiver module and low frequency receiving antenna are received after wireless low frequency wake-up signal, wake described key main control module up, control high frequency sending module and send wireless high-frequency ID signal to smart lock base station by high frequency transmitting antenna;
The high frequency receiver module of smart lock base station receives after the wireless high-frequency ID signal that Intelligent key returns by high frequency receiving antenna, and ID is mated to certification, and certification is by rear control motor drive module unlatching smart lock.
4. the intelligent lock system of differentiating based on high frequency antenna feature as claimed in claim 3, is characterized in that: if smart lock is not received legal wireless high-frequency ID signal within the time of setting, enter low power consumpting state, wait for and being again waken up.
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| CN201410226523.8A CN103971438A (en) | 2014-05-26 | 2014-05-26 | Intelligent lock system based on high-frequency antenna feature judgment |
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| CN201410226523.8A CN103971438A (en) | 2014-05-26 | 2014-05-26 | Intelligent lock system based on high-frequency antenna feature judgment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157063A (en) * | 2014-08-25 | 2014-11-19 | 南通博云物联网技术有限公司 | Entrance guard system and controlling method thereof |
| CN104537812A (en) * | 2014-10-22 | 2015-04-22 | 盘锦兴凯隆电子科技有限公司 | A PKE remote control induction lock |
| CN106907064A (en) * | 2017-03-16 | 2017-06-30 | 山东劳恩卓智能科技有限公司 | A kind of signal identification device, method and with the device without non-key smart lock |
| CN111862397A (en) * | 2019-06-05 | 2020-10-30 | 北京骑胜科技有限公司 | Vehicle lock control device, method, apparatus, vehicle, electronic device, and storage medium |
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| EP0559159A1 (en) * | 1992-03-06 | 1993-09-08 | Aug. Winkhaus GmbH & Co. KG | Electronic device for locking |
| US20040178882A1 (en) * | 2001-07-05 | 2004-09-16 | Thierry Roz | Method for keyless unlocking of an access door to a closed space |
| CN201965676U (en) * | 2011-01-19 | 2011-09-07 | 上海索帛电子科技有限公司 | Complex access judgement access control machine |
| CN102654003A (en) * | 2012-06-01 | 2012-09-05 | 杭州双华智能家居有限公司 | Low power consumption remote awakening intelligent lock system |
| CN103593895A (en) * | 2013-11-26 | 2014-02-19 | 成都理工大学 | Electronic access control system based on RFID (radio frequency identification devices) technologies |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0559159A1 (en) * | 1992-03-06 | 1993-09-08 | Aug. Winkhaus GmbH & Co. KG | Electronic device for locking |
| US20040178882A1 (en) * | 2001-07-05 | 2004-09-16 | Thierry Roz | Method for keyless unlocking of an access door to a closed space |
| CN201965676U (en) * | 2011-01-19 | 2011-09-07 | 上海索帛电子科技有限公司 | Complex access judgement access control machine |
| CN102654003A (en) * | 2012-06-01 | 2012-09-05 | 杭州双华智能家居有限公司 | Low power consumption remote awakening intelligent lock system |
| CN103593895A (en) * | 2013-11-26 | 2014-02-19 | 成都理工大学 | Electronic access control system based on RFID (radio frequency identification devices) technologies |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157063A (en) * | 2014-08-25 | 2014-11-19 | 南通博云物联网技术有限公司 | Entrance guard system and controlling method thereof |
| CN104157063B (en) * | 2014-08-25 | 2017-03-08 | 江苏博云物联科技有限公司 | A kind of gate control system and its control method |
| CN104537812A (en) * | 2014-10-22 | 2015-04-22 | 盘锦兴凯隆电子科技有限公司 | A PKE remote control induction lock |
| CN106907064A (en) * | 2017-03-16 | 2017-06-30 | 山东劳恩卓智能科技有限公司 | A kind of signal identification device, method and with the device without non-key smart lock |
| CN111862397A (en) * | 2019-06-05 | 2020-10-30 | 北京骑胜科技有限公司 | Vehicle lock control device, method, apparatus, vehicle, electronic device, and storage medium |
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Application publication date: 20140806 |