CN104648320A - RFID (radio frequency identification devices)-based vehicle alarm system and control method thereof - Google Patents
RFID (radio frequency identification devices)-based vehicle alarm system and control method thereof Download PDFInfo
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- CN104648320A CN104648320A CN201410784512.1A CN201410784512A CN104648320A CN 104648320 A CN104648320 A CN 104648320A CN 201410784512 A CN201410784512 A CN 201410784512A CN 104648320 A CN104648320 A CN 104648320A
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- aerotron
- rfid
- controller
- password
- state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2325/00—Indexing scheme relating to vehicle anti-theft devices
- B60R2325/10—Communication protocols, communication systems of vehicle anti-theft devices
- B60R2325/105—Radio frequency identification data [RFID]
Abstract
The invention discloses an RFID (radio frequency identification devices)-based vehicle alarm system and a control method thereof. The system comprises a controller; the input end of the controller is connected with an RFID identifier, a vehicle state detection circuit, a vibrating sensor and a keying circuit; the output end of the controller is connected with a vehicle door control circuit, an oil-way control circuit, a voice module and a display module; the controller is used for controlling the working state of the RFID identifier in a manner that vehicle state information is acquired through the vehicle state detection circuit; password information is acquired from the RFID identifier by the controller, and an unlocking signal is sent to the vehicle door control circuit and the oil-way control circuit according to the password information. The RFID-based vehicle alarm system and the control method thereof disclosed by the invention have the significant effects that by detecting the working condition of a vehicle, the working state of the RFID identifier is automatically switched; the RFID-based vehicle alarm system has a password modification function and a password writing-in function, so that the vehicle alarm system is more intelligentized and humanized.
Description
Technical field
The present invention relates to technical field of automobile theft prevention, specifically, is a kind of automotive theft proof system based on RFID.
Background technology
Traditional automotive theft proof system adopts wireless remote control mode.The radiation of wireless remote control to people is disturbed more greatly, easily, and will change battery; If remote-control key is lost or damaged, also want return-to-factory to deliver or maintenance, the time is long and process is loaded down with trivial details, uses inconvenience
RFID is one and is easy to manipulation, simple and practical and be particularly suitable for the alerting ability application engineering of Automated condtrol.It is without the need to contact or aim at; Under can being freely operated in various harsh environment; The data integration of height can be carried out; In addition, due to this technology be difficult to by counterfeit, invade, the safety precaution ability that RFID is possessed is high.
Therefore, Chinese patent CN 203047168 U discloses a kind of alarms and security systems for automobiles based on RFID, and this device comprises electronic tag and cell on wheels, is transmitted and sends into cell on wheels test by electronic tag; If automobile can determine car owner's identity by verification electron key, and then automatically opens car door or forbid that normal key is unblanked.But this device in use there are the following problems: can only play and antitheftly inform effect, can not report to the police to behavior of illegally unblanking, stop automobile stolen in time; Device is in anti-theft state always, can not automatically switch, use inconvenience according to automobile service condition.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of automotive theft proof system based on RFID and control method thereof, this system can not only play the antitheft effect with reporting to the police, and by detecting the using state of vehicle, thus can also determine whether vehicle enters anti-theft state.
For achieving the above object, the present invention states a kind of automotive theft proof system based on RFID, comprise controller, its key is: the input end group of described controller is connected with RFID recognizer and vehicle-state testing circuit, the mouth group of described controller is connected with door control circuit and oil circuit control circuit, key circuit and vibration sensor is also connected with at the input end of described controller, the mouth of described controller is also connected with voice module and display module, and the serial communication interface of described controller is connected with I2C memory module;
Described vehicle-state testing circuit comprises aerotron Q1 and aerotron Q2, be connected with the power circuit of automobile ignition switch after the base stage series resistor R2 of aerotron Q1, direct supply is connect after the collector series resistance R6 of aerotron Q1, the grounded emitter of aerotron Q1, the collecting electrode of aerotron Q1 is also connected with the base stage of aerotron Q2, direct supply is connect after the collector series resistance R21 of aerotron Q2, the grounded emitter of aerotron Q2, the collecting electrode of aerotron Q2 is also connected with the second input end of described controller, electric capacity C4 is also serially connected with between the collecting electrode and emitter of aerotron Q2,
Described door control circuit comprises aerotron Q9 and relay J 1, be connected with the first mouth of described controller after the base stage series resistor R22 of described aerotron Q9, the collecting electrode of aerotron Q9 is connected with the positive pole of diode D1, the negative pole of diode D1 connects 12V direct supply, the grounded emitter of aerotron Q9, connect 12V direct supply after the collecting electrode of aerotron Q9 is also connected in series the coil winding of relay J 1, the switches set of relay J 1 is signal output part, and output signal drives the opening and closing of car door;
Described oil circuit control circuit comprises aerotron Q13 and relay J 2, be connected with the second mouth of described controller after the base stage series resistor R23 of described aerotron Q13, the collecting electrode of aerotron Q13 is connected with the positive pole of diode D2, the negative pole of diode D2 connects 12V direct supply, the grounded emitter of aerotron Q13,12V direct supply is connect after the collecting electrode of aerotron Q13 is also connected in series the coil winding of relay J 2, the switches set of relay J 1 is signal output part, and output signal drives the opening and closing of oil circuit.
Native system arranges key circuit can easily for operations such as password amendments, and whether detect brake by vibration sensor and step on, arranging voice module not only can be used for being locked into row audio alert to illegal solution, can also carry out voice message; The mode of operation that display module can know each module in anti-theft circuit is easily set.In use, first controller obtains the energising situation of automobile ignition switch by vehicle-state testing circuit, after ignition lock closes a period of time, controller sends signal and controls its work to RFID recognizer, when car owner swipes the card unblock, controller obtains encrypted message from described RFID recognizer, sending unlocking signal when encrypted message is correct drives door control circuit to open Door Lock, send unlocking signal simultaneously and drive the locking of oil circuit control circuit releasing to oil circuit, make car owner normally can start vehicle.This circuit is by detecting the using state of vehicle, thus the mode of operation of auto-changeover control RFID recognizer, the antitheft effect with reporting to the police can not only being played, avoiding out need the phenomenon unlocked of swiping the card now, but also can electric energy be saved, extend RFID recognizer service life.
As preferably, described controller adopts HT46R24 chip, and described RFID recognizer adopts WM-01T radio-frequency module, and described voice module adopts XF-3111 speech chip.
In conjunction with the circuit structure of the above-mentioned automotive theft proof system based on RFID, the present invention also describes a kind of control method based on above-mentioned automotive theft proof system, and concrete scheme is as follows:
Based on a control method for the automotive theft proof system of RFID, carry out according to following steps:
Step 1: system initialization;
Step 2: unblock of swiping the card, the preset password in the encrypted message of acquisition and described I2C memory module compares by controller, if identical, then controller drives Door Lock and Fuel path lock to open, and enters step 3; Otherwise return step 1;
Step 3: the mode of operation obtaining automobile ignition switch, if automobile ignition switch is in ON state, then drives RFID recognizer to be in OFF state, otherwise enters step 4;
Step 4: record ignition lock is in the time of OFF state, when being greater than preset time T 1, then drive RFID recognizer to be in ON mode of operation, automobile enters anti-theft state.
Further, in order to improve the confidentiality of described preset password, can carry out the amendment of preset password as follows, the preset password in step 2 is modified according to following steps:
Step S1: when ignition lock is in ON state, press one-touch within the T2 time period, enter preset password update routine;
Step S2: obtained the vibration signal with M pulse stepped on brake and formed by vibration sensor;
Step S3: when the vibration signal pulse number M inputted in step S2 is identical with active coding, carries out voice message, wait new password to be entered;
Step S4: form m section vibration signal by stepping on brake, the pulse number of every section of vibration signal is designated as N
i, (1, m), m is the length of new password to i ∈, and successively using the pulse number of i-th section of vibration signal numeral of i-th in new password, in the predeterminated position stored in I2C memory device, lang sound prompt cipher of going forward side by side is successfully modified.
Further describe, during in order to lose at identification card or need to add other new useful identification cards, therefore, need to carry out preset password to write identification card, the preset password in step 2 writes identification card according to following steps again:
Steps A: when ignition lock is in ON state, press twice button within the T2 time period, enter preset password write-in program;
Step B: identification card is placed in RFID recognizer place, carries out preset password write;
Step C: when preset password is identical with the original password in identification card, preset password is stored, and voice message password writes successfully.
As preferably, the value of described preset time T 1 is 10-20s, and the value of time period T2 is 3-10s.
Remarkable result of the present invention is: by detecting the using state of vehicle, thus the mode of operation of auto-changeover control RFID recognizer, the antitheft effect with reporting to the police can not only be played, avoid out need the phenomenon unlocked of swiping the card now, but also can electric energy be saved, extend RFID recognizer service life; This programme also has password amendment and password write-in functions in addition, makes anti-theft system more intellectuality and hommization.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention;
Fig. 2 is the schematic circuit diagram of described controller;
Fig. 3 is the schematic circuit diagram of described vehicle condition observation circuit;
Fig. 4 is the schematic circuit diagram of described RFID recognizer;
Fig. 5 is the schematic circuit diagram of described door control circuit and oil circuit control circuit;
Fig. 6 is the schematic circuit diagram of described voice module;
Fig. 7 is control method diagram of circuit of the present invention;
Fig. 8 is the modify steps diagram of circuit of preset password in the present invention;
Fig. 9 is the diagram of circuit of preset password write identification card in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention and principle of work are described in further detail.
As shown in Figure 1, a kind of automotive theft proof system based on RFID, comprise controller, the input end group of described controller is connected with RFID recognizer, key circuit, vibration sensor and vehicle-state testing circuit, the mouth group of described controller is connected with door control circuit, oil circuit control circuit, voice module and display module, described controller obtains car status information by vehicle-state testing circuit, the mode of operation of described RFID recognizer is controlled according to car status information, described controller obtains encrypted message by described RFID recognizer, unlocking signal is sent to described door control circuit and oil circuit control circuit according to encrypted message, described key circuit is used for Modify password, described vibration sensor is used for carrying out password amendment by the number of times stepping on brake, and described voice module is used for being locked into row audio alert and voice message to illegal solution, and described display module is for showing the mode of operation of this anti-theft circuit, the serial communication interface of described controller is connected with I2C memory module, is realized the storage of card number information and encrypted message by described I2C memory module.
As shown in Figure 2, described controller adopts HT46R24 chip, HT46R24 chip is 8 is High Performance reduced instruction set computer micro controller system, be specially the product needing A/D change and designing, there is low-power consumption, I/O uses flexibly, selections of programmable frequency divider, counting machine, type of oscillation, multi-channel A/D conversion, impulsive measurement function, I2C communicate, time-out and arousal function.
As shown in Figure 3, described vehicle-state testing circuit comprises aerotron Q1 and aerotron Q2, be connected with the power circuit of automobile ignition switch after the base stage series resistor R2 of aerotron Q1, direct supply is connect after the collector series resistance R6 of aerotron Q1, the grounded emitter of aerotron Q1, the collecting electrode of aerotron Q1 is also connected with the base stage of aerotron Q2, direct supply is connect after the collector series resistance R21 of aerotron Q2, the grounded emitter of aerotron Q2, the collecting electrode of aerotron Q2 is also connected with the PA1 port of described controller, electric capacity C4 is serially connected with between the collecting electrode and emitter of aerotron Q2.
As shown in Figure 4, the recognizer of RFID described in this example adopts WM-01T radio-frequency module, the serial communication interface of this radio-frequency module is connected with PB4, PB5 pin of controller respectively, aerotron Q10 is connected with between the power input of described radio-frequency module and the PA2 mouth of controller, the base stage of aerotron Q10 is connected with the PA2 mouth of controller, the collecting electrode of aerotron Q10 is connected with the power input of described radio-frequency module, the grounded emitter of aerotron Q10, the collector series connection resistance R10 of aerotron Q10 connects 5V direct supply.This circuit is for obtaining the energising situation of automobile ignition switch, if during ignition lock energising work, controller output low level signal makes aerotron Q10 end, and the power-off of RFID recognizer does not work; If time after ignition lock power-off a period of time, controller sends signal and sends high level signal driving aerotron Q10 conducting, and RFID recognizer obtains electric work
See accompanying drawing 5, described door control circuit comprises aerotron Q9 and relay J 1, be connected with the PB6 pin of described controller after the base stage series resistor R22 of described aerotron Q9, the collecting electrode of aerotron Q9 is connected with the positive pole of diode D1, the negative pole of diode D1 connects 12V direct supply, the grounded emitter of aerotron Q9,12V direct supply is connect after the collecting electrode of aerotron Q9 is also connected in series the coil winding of relay J 1, the switches set of relay J 1 is signal output part, when circuit does not receive the signal that controller sends, relay J 1 drives car door to lock; When circuit receives the signal that controller sends, aerotron Q9 conducting, relay J 1 drives Door Lock to unlock.
It can also be seen that from Fig. 5, described oil circuit control circuit comprises aerotron Q13 and relay J 2, be connected with the PB7 pin of described controller after the base stage series resistor R23 of described aerotron Q13, the collecting electrode of aerotron Q13 is connected with the positive pole of diode D2, the negative pole of diode D2 connects 12V direct supply, the grounded emitter of aerotron Q13, 12V direct supply is connect after the collecting electrode of aerotron Q13 is also connected in series the coil winding of relay J 2, the switches set of relay J 2 is signal output part, when circuit does not receive the signal that controller sends, relay J 2 drives oil circuit to lock, when circuit receives the signal that controller sends, aerotron Q13 conducting, relay J 2 drives Fuel path lock to unlock.
As can be seen from Figure 6, voice module described in this example adopts XF-3111 speech chip, and the signal input part RXD of this speech chip is connected with the PD1 of described controller, the output terminals A UDIO output audio signal of this speech chip.
In conjunction with the circuit structure of the above-mentioned automotive theft proof system based on RFID, the present embodiment also describes a kind of control method based on above-mentioned automotive theft proof system, and concrete scheme is as follows:
As shown in Figure 7, a kind of control method of the automotive theft proof system based on RFID, carry out according to following steps:
Step 1: system initialization;
Step 2: unblock of swiping the card, the preset password in the encrypted message of acquisition and described I2C memory module compares by controller, if identical, then controller drives Door Lock and Fuel path lock to open, and enters step 3; Otherwise return step 1;
Step 3: the mode of operation obtaining automobile ignition switch, if automobile ignition switch is in ON state, then drives RFID recognizer to be in OFF state, otherwise enters step 4;
Step 4: record ignition lock is in the time of OFF state, when being greater than preset time T 1, then drive RFID recognizer to be in ON mode of operation, automobile enters anti-theft state.
Further, when the automobile newly purchased needs to arrange preset password, or when needing amendment preset password to ensure the safety of preset password, just need a kind of simple preset password amending method.
As shown in Figure 8, described in step 2, preset password is modified according to following steps:
Step S1: after ignition lock is in ON state, when the number of times that button is pressed within the T2 time period is one time, forms the vibration signal of M pulse by stepping on brake;
Step S2: when the vibration signal pulse number M inputted in step S1 is identical with active coding, carries out voice message, wait preset password to be entered;
Step S3: form m section vibration signal by stepping on brake, the pulse number of every section of vibration signal is designated as N
i, (1, m), m is the length of preset password to i ∈, successively using the pulse number of i-th section of vibration signal numeral of i-th in preset password, in the predeterminated position stored in I2C memory device, and carries out voice message.
In the present embodiment, if active coding is 4, when ignition lock is in ON state, step on the vibration signal of 4 brake inputs, 4 pulses, after the match is successful when this vibration signal and active coding, input 3 sections of vibration signals, i.e. i=1 ~ 3, the pulse number of every section of vibration signal is respectively 2,3,5, i.e. the number N of pulse in i-th section of password
ibe respectively 2,3,5, then successively using the pulse number of every section of vibration signal numeral of every in preset password, namely preset password is " 235 ", and by its predeterminated position stored in I2C memory device.
Lose at identification card or when needing to add other new identification cards, need preset password to write identification card, therefore just need a kind of password wiring method.
As shown in Figure 9, the preset password in step 2 writes identification card according to following steps:
Steps A: when ignition lock is in ON state, press twice button within the T2 time period, enter preset password write-in program;
Step B: identification card is placed in RFID recognizer place, carries out preset password write;
Step C: when preset password is identical with the original password in identification card, preset password is stored, and voice message password writes successfully.
As preferably, the value of described preset time T 1 is 10-20s, and the value of time period T2 is 3-10s.
The present invention is by detecting the using state of vehicle, thus the mode of operation of auto-changeover control RFID recognizer, the antitheft effect with reporting to the police can not only being played, avoiding out need the phenomenon unlocked of swiping the card now, but also can electric energy be saved, extend RFID recognizer service life; Also there is password amendment and password write-in functions in addition, make more intellectuality and the hommization of this anti-theft system.
Claims (6)
1. the automotive theft proof system based on RFID, comprise controller, it is characterized in that: the input end group of described controller is connected with RFID recognizer and vehicle-state testing circuit, the mouth group of described controller is connected with door control circuit and oil circuit control circuit, key circuit and vibration sensor is also connected with at the input end of described controller, the mouth of described controller is also connected with voice module and display module, and the serial communication interface of described controller is connected with I2C memory module;
Wherein, described vehicle-state testing circuit comprises aerotron Q1 and aerotron Q2, be connected with the power circuit of automobile ignition switch after the base stage series resistor R2 of aerotron Q1, direct supply is connect after the collector series resistance R6 of aerotron Q1, the grounded emitter of aerotron Q1, the collecting electrode of aerotron Q1 is also connected with the base stage of aerotron Q2, direct supply is connect after the collector series resistance R21 of aerotron Q2, the grounded emitter of aerotron Q2, the collecting electrode of aerotron Q2 is also connected with the second input end of described controller, electric capacity C4 is serially connected with between the collecting electrode and emitter of aerotron Q2,
Described door control circuit comprises aerotron Q9 and relay J 1, be connected with the first mouth of described controller after the base stage series resistor R22 of described aerotron Q9, the collecting electrode of aerotron Q9 is connected with the positive pole of diode D1, the negative pole of diode D1 connects 12V direct supply, the grounded emitter of aerotron Q9, connect 12V direct supply after the collecting electrode of aerotron Q9 is also connected in series the coil winding of relay J 1, the switches set of relay J 1 is signal output part, and output signal drives the opening and closing of car door;
Described oil circuit control circuit comprises aerotron Q13 and relay J 2, be connected with the second mouth of described controller after the base stage series resistor R23 of described aerotron Q13, the collecting electrode of aerotron Q13 is connected with the positive pole of diode D2, the negative pole of diode D2 connects 12V direct supply, the grounded emitter of aerotron Q13,12V direct supply is connect after the collecting electrode of aerotron Q13 is also connected in series the coil winding of relay J 2, the switches set of relay J 1 is signal output part, and output signal drives the opening and closing of oil circuit.
2. the automotive theft proof system based on RFID according to claim 1, is characterized in that: described controller adopts HT46R24 chip, and described RFID recognizer adopts WM-01T radio-frequency module, and described voice module adopts XF-3111 speech chip.
3., as claimed in claim 1 based on a control method for the automotive theft proof system of RFID, it is characterized in that carrying out according to following steps:
Step 1: system initialization;
Step 2: unblock of swiping the card, the preset password in the encrypted message of acquisition and described I2C memory module compares by controller, if identical, then controller drives Door Lock and Fuel path lock to open, and enters step 3; Otherwise return step 1;
Step 3: the mode of operation obtaining automobile ignition switch, if automobile ignition switch is in ON state, then drives RFID recognizer to be in OFF state, otherwise enters step 4;
Step 4: record ignition lock is in the time of OFF state, when being greater than preset time T 1, then drive RFID recognizer to be in ON mode of operation, automobile enters anti-theft state.
4. the control method of the automotive theft proof system based on RFID according to claim 3, is characterized in that: the preset password in step 2 is modified according to following steps:
Step S1: when ignition lock is in ON state, press one-touch within the T2 time period, enter preset password update routine;
Step S2: obtained the vibration signal with M pulse stepped on brake and formed by vibration sensor;
Step S3: when the vibration signal pulse number M inputted in step S2 is identical with active coding, carries out voice message, wait new password to be entered;
Step S4: form m section vibration signal by stepping on brake, the pulse number of every section of vibration signal is designated as N
i, (1, m), m is the length of new password to i ∈, and successively using the pulse number of i-th section of vibration signal numeral of i-th in new password, in the predeterminated position stored in I2C memory device, lang sound prompt cipher of going forward side by side is successfully modified.
5. the control method of the automotive theft proof system based on RFID according to claim 3, is characterized in that: the preset password in step 2 writes identification card according to following steps:
Steps A: when ignition lock is in ON state, press twice button within the T2 time period, enter preset password write-in program;
Step B: identification card is placed in RFID recognizer place, carries out preset password write;
Step C: when preset password is identical with the original password in identification card, preset password is stored, and voice message password writes successfully.
6. the control method of the automotive theft proof system based on RFID according to claim 4 or 5, is characterized in that: the value of described preset time T 1 is 10-20s, and the value of time period T2 is 3-10s.
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| CN201410784512.1A CN104648320A (en) | 2014-12-17 | 2014-12-17 | RFID (radio frequency identification devices)-based vehicle alarm system and control method thereof |
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| CN201410784512.1A CN104648320A (en) | 2014-12-17 | 2014-12-17 | RFID (radio frequency identification devices)-based vehicle alarm system and control method thereof |
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Application publication date: 20150527 |