CN102529892A - Automotive electronic anti-theft alarm device - Google Patents
Automotive electronic anti-theft alarm device Download PDFInfo
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Abstract
The invention relates to an automotive electronic anti-theft alarm device and belongs to the field of automotive electronics. The automotive electronic anti-theft alarm device comprises a remote control key and an anti-theft alarm controller. The anti-theft alarm controller is provided with three environmental parameter modules, namely an in-vehicle temperature sensor, a sound intensity sensor and a real-time clock, wherein a micro-controller of the anti-theft alarm controller is used for acquiring environmental parameters so as to generate passwords for locking a vehicle, unlocking and opening a trunk and three wireless communication channel selected values for sending commands and the passwords for locking the vehicle, unlocking and opening the trunk, and the passwords and the communication channel selected values can be updated after being used once so as to increase the difficulty of a lawless person in monitoring, cracking and further stealing the vehicle through an electronic decoder. The automotive electronic anti-theft alarm device provided by the invention has the advantages of lower cost and better safety and reliability.
Description
Technical field
The present invention relates to vehicle electronics, particularly the vehicle electronics burglar alarm.
Background technology
Though the vehicle electronics burglar alarm is comparative maturity technically, there are some defectives in many products.A kind of to the well-designed novel electronic wireless remote control device of high-tech electronic demoder cryptanalytic technique at publication number for the CN101343960A Chinese invention patent discloses; Receiver of remote-control sytem can be discerned normal mode of operation and illegal operation mode in moment; Make the anti-theft protection action that stops to receive any wireless signal immediately immediately after being identified as the illegal operation mode; Because the remote control transmitter of this invention and receiver of remote-control sytem use fixing wireless communication frequency; In case the interfering signal of lawless person's emission has taken this frequency, the car owner can't open car door or remove the state of alert, secondly; The remote control password of this invention adopts fixing value, and safety is not high; The automotive theft proof system that a kind of automobile key and engine anti-theft controller carry out authentication through wired single bus communication, publication number is disclosed in being the Chinese invention patent of CN101244715A; Can solve instruction and password leakage that communication causes preferably; But, adopt the single bus communication technology reliability existing problems of Transistor-Transistor Logic level because the electro countermeasure signal is more intense in the automobile; A kind of VATS Vehicle Anti-Theft System that combines electron key checking and human body authorization information to verify, publication number is disclosed in being the Chinese invention patent of CN1860050A; The information such as fingerprint, iris/retina or vein that the human body authorization information is behaved, but the equipment of this type human body information itself very accurate, cost an arm and a leg and damage easily; There are some intrinsic product defectses in existing car alarm, so that or cost is too high or reliability is bad or safety is not high.
Summary of the invention
To the defective that existing car alarm exists, the technical issues that need to address of the present invention provide that a kind of cost is lower, reliability and the better vehicle electronics burglar alarm of safety.
In order to solve this technical matters, the present invention adopts following technical scheme: the vehicle electronics burglar alarm comprises hardware and software two parts, and present invention is described from hardware configuration and software processing method respectively.
On hardware configuration, the vehicle electronics burglar alarm comprises remote-control key (1) and vehicle-mounted anti-theft and alarm device (5).Described remote-control key comprises microcontroller (20), non-volatility memorizer (2), 2.4GHz wireless communication module (3) and wireless communication module antenna (4).Described microcontroller (20), non-volatility memorizer (2), 2.4GHz wireless communication module (3) and wireless communication module antenna (4) are electrically connected successively.Described anti-theft and alarm device comprises microcontroller (14), non-volatility memorizer (8), 2.4GHz wireless communication module (9), wireless communication module antenna (10) and door lock, light, loudspeaker, automatic window, engine anti-theft interface (15).Described microcontroller (14), non-volatility memorizer (8), 2.4GHz wireless communication module (9), wireless communication module antenna (10) and door lock, light, loudspeaker, automatic window, engine anti-theft interface (15) are electrically connected successively.With publication number is that different is for the Chinese invention patent of CN101244715A: remote-control key is provided with three contact interface (18), and this three contact interface (18) is electrically connected with microcontroller (20); Different is with other disclosed automotive electronic anti-theft device patent, in described anti-theft and alarm device, also is provided with sound transducer (11), temperature sensor (12), real-time clock (13), photoelectricity and isolates and level switch module (7), three contact interface (6) of ignition lock position and three contact interface (16) of driver door lock position.Described sound transducer (11), temperature sensor (12), real-time clock (13), photoelectricity isolation level conversion (7) are electrically connected with microcontroller (14).Three contact interface (6) of described ignition lock position, three contact interface (16) of driver door lock position are electrically connected with photoelectricity isolation and level switch module (7).Because electro countermeasure is big in the automobile, reliability and safety when ensureing between remote-control key (1) and the vehicle-mounted anti-theft and alarm device (5) through wire communication, the employing photoelectricity isolation method that is coupled is communicated by letter with the RS-232 level signal.
Improved the strategy that adopts relatively-stationary password and radio communication channel to carry out authentication between existing automotive anti-theft alarming system remote-control key (1) and the anti-theft and alarm device (5) on the software processing method.When utilizing remote-control key to lock car, release or opening the boot operation, need carry out authentication earlier.The process of authentication is: remote-control key (1) is with command code and be stored in the password in the non-volatility memorizer (2); The radio communication channel of setting up through 2.4GHz wireless communication module (3), wireless communication module antenna (4) sends; Anti-theft and alarm device (5) receives and obtains command code and password from 2.4GHz wireless communication module (9); It and the password that is stored in command adapted thereto sign indicating number in the non-volatility memorizer (8) are compared, the identical then authentication success of password, the anti-theft and alarm device is carried out corresponding instruction; Otherwise the authentication failure, the anti-theft and alarm device is not carried out corresponding instruction.In case wireless channel is occupied or wireless communication link goes wrong; Authentication can also be carried out through wired connection; The authentication authorization and accounting process is: after remote-control key inserts lock; Anti-theft and alarm device (5) detects key and inserts, and sends the request of reading password to remote-control key, and the anti-theft and alarm device can determine to send the request of the password that obtains " release " or " lock car " instruction automatically according to the state of residing " warning " or " non-warning "; The wired connection that this request is set up through three contact interface (16) and three contact interface (18) on the remote-control key of the driver door lock position of anti-theft and alarm device sends out; After remote-control key is received request, will be stored in the password in the non-volatility memorizer (2), pass back through above-mentioned wired connection; The anti-theft and alarm device obtains command code and password from photoelectricity isolation and level switch module (7); It and the password that is stored in the command adapted thereto sign indicating number in the non-volatility memorizer (8) are compared, the identical then authentication success of password, the anti-theft and alarm device is carried out corresponding " lock car " or " release " instruction; Otherwise the authentication failure, the anti-theft and alarm device is not carried out corresponding instruction.
In order to reach better safety; When carrying out authentication through wireless mode; Command code and the command code of password, remote controlled unlocking and the command code that boot is opened in password, remote control that is used to send remote control vehicle locking adopts different channels to transmit respectively with password, and this radio communication channel selects numerical value to leave in the non-volatility memorizer (2) of remote-control key in the non-volatility memorizer (8) with the anti-theft and alarm device.The audio parameter para1 that the selective value of radio communication channel is obtained from sound transducer (11) by microcontroller (14), the temperature parameter para2 that obtains from temperature sensor (12), three environmental parameterss of time parameter para3 of constantly obtaining from real-time clock (13) at car key direction of insertion dish lock obtain through mathematical computations.The used password of authentication; Be that the password of password, the remote controlled unlocking of remote control vehicle locking, password that boot is opened in remote control are audio parameter para1 that microcontroller (14) is obtained from sound transducer (11), the temperature parameter para2 that obtains from temperature sensor (12), three environmental parameterss of time parameter para3 of constantly obtaining from real-time clock (13) at car key direction of insertion dish lock generate 6 groups 64 key and 6 groups 64 plaintext according to different orders; Be input in the des encryption algorithm and handle; Obtain 3 groups of 128 passwords; Be used for authentication, be stored in after these 3 passwords generate in the non-volatility memorizer (2) of remote-control key in the non-volatility memorizer (8) with the anti-theft and alarm device.Microcontroller (14) is used situation to password and registers; In case finding any one password was used once; When microcontroller (14) will insert the engine ignition lock in remote-control key (1) next time; Regenerate radio communication channel selective value and password according to the generation method of above-mentioned radio communication channel selective value and the generation method of password; And the wired connection of setting up through three contact interface (18) and three contact interface (6), this radio communication channel selective value and three 128 s' password is sent to remote-control key, be stored in former radio communication channel selective value and three memory spaces that password belongs to.
Particularly; Definite method of radio communication channel value is when 2.4GHz wireless communication module (3), 2.4GHz wireless communication module (9) select nRF24L01 or nRF2401 to be the communication module of core; Microcontroller (14) is regarded as 8 unsigned numbers with audio parameter para1, temperature parameter para2, time parameter para3, generates the radio communication channel selective value through mathematical computations.Formula is following: send the command code of remote control vehicle locking and channel value chan1=(the audio parameter para1+ temperature parameter para2+ time parameter para3) %126 of password; Send the command code of remote controlled unlocking and channel value chan2=(the audio parameter para1+ temperature parameter para2-time parameter para3) %126 of password, send remote control and open the command code of boot and channel value chan3=(the audio parameter para1-temperature parameter para2+ time parameter para3) %126 of password; Also can confirm the radio communication channel value: can select to send the command code of remote control vehicle locking and the channel value chan1=of password (audio parameter para1-temperature parameter para2-time parameter para3) %126 according to other Arithmetic Formula; Send the command code of remote controlled unlocking and channel value chan2=(the audio parameter para1-temperature parameter para2+ time parameter para3) %126 of password, send remote control and open the command code of boot and channel value chan3=(the audio parameter para1+ temperature parameter para2-time parameter para3) %126 of password.
Vehicle electronics burglar alarm of the present invention improves from carrying out the authentication strategy between hardware configuration and remote-control key and the antitheft control alarm controller; Increased and gathered vehicle interior temperature, the sensor circuit of intensity of sound, real-time clock, adopted above-mentioned environmental parameters to produce password, password regenerates after only using once; The radio communication channel that transmits password is unfixing; Also produced by the environmental parameters value, safety is better, adopts the RS-232 level to carry out wire communication; Antijamming capability is stronger, and stability is better.
Description of drawings
Fig. 1 is the structured flowchart of vehicle electronics burglar alarm of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further explain.
As shown in Figure 1; Vehicle electronics burglar alarm hardware configuration of the present invention comprises two parts: remote-control key of carrying (1) and vehicle-mounted anti-theft and alarm device (5); Described remote-control key comprises microcontroller (20), non-volatility memorizer (2), 2.4GHz wireless communication module (3) and wireless communication module antenna (4), and described microcontroller (20), non-volatility memorizer (2), 2.4GHz wireless communication module (3) and wireless communication module antenna (4) are electrically connected successively; Described anti-theft and alarm device comprises microcontroller (14), non-volatility memorizer (8), 2.4GHz wireless communication module (9), wireless communication module antenna (10) and door lock, light, loudspeaker, automatic window, engine anti-theft interface (15), and described microcontroller (14), non-volatility memorizer (8), 2.4GHz wireless communication module (9), wireless communication module antenna (10) and door lock, light, loudspeaker, automatic window, engine anti-theft interface (15) are electrically connected successively; On remote-control key, be provided with three contact interface (18), this three contact interface (18) is electrically connected with microcontroller (20); In described anti-theft and alarm device, also be provided with sound transducer (11), temperature sensor (12), real-time clock (13), photoelectricity isolation and level switch module (7), three contact interface (6) of ignition lock position and three contact interface (16) of driver door lock position; Described sound transducer (11), temperature sensor (12), real-time clock (13), photoelectricity isolation level conversion (7) are electrically connected with microcontroller (14), and three contact interface (6) of described ignition lock position, three contact interface (16) of driver door lock position are electrically connected with photoelectricity isolation and level switch module (7).
As preferred scheme, microcontroller (20) and microcontroller (14) can select to support ISP function, on-chip SRAM capacity to reach that the Flash program store reaches the above MCU of 32K byte in 1280 bytes, the sheet, like the STC12 family chip etc.; Non-volatility memorizer (2) and non-volatility memorizer (8) are used to store radio communication channel value and three 128 password values, can select the eeprom chip of 1K position storage space, like chips such as 24C01; 2.4GHz wireless communication module (3) on the remote-control key and the 2.4GHz wireless communication module (9) on the anti-theft controller are preferably selected same batch of chip of same producer, like special chips such as nRF24L01, nRF2401 in order to reach communication efficiency preferably; Wireless communication module antenna (4) receives the restriction of remote-control key size, is designed to invisible antenna, directly accomplishes on the circuit card, and in order to increase communication distance, wireless communication module antenna (10) needs to adopt external mode; Door lock, light, loudspeaker, automatic window, engine anti-theft interface (15) are designed to CAN EBI standard, with existing electronic system interconnection in convenient and the car; Remote-control key is provided with three contact interface (18) and is designed to supporting structure with three contact interface (6) of ignition lock position and three contact interface (16) of driver door lock position; Guarantee that cooresponding three contacts can reliably contact when key inserts ignition lock or driver door lock; Sound transducer (11) circuit layout becomes when environmental volume is between 30 decibels ~ 100 decibels, the output aanalogvoltage 0V ~+3.3V changes continuously so that microcontroller (14) is sampled through A/D; Temperature sensor (12) circuit layout becomes when ambient temperature is between-20 ℃ ~+50 ℃, the output aanalogvoltage 0V ~+3.3V changes continuously so that microcontroller (14) is sampled through A/D; Real-time clock (13) can adopt low-power consumption real-time timepiece chips such as DS1302, so as microcontroller (14) directly read its year, the moon, day, the time, branch, second value, the value of clock does not need calibration, needs only it and is running just passable always; Photoelectricity is isolated and level switch module (7) can be selected the dual channel optoelectronic coupler, isolated outward to realize car inner electronic equipment and car; Avoid artificial destruction; Level conversion can be selected RS-232/TTL level transferring chip such as twin-channel max3232; The photoelectricity isolation is only installed in the driver door lock position, and level switch module need be installed in driver door lock, ignition lock and three positions of anti-theft and alarm device; Because electro countermeasure is big in the automobile, reliability and safety when ensureing between remote-control key (1) and the vehicle-mounted anti-theft and alarm device (5) through wire communication, employing photoelectricity isolation method is communicated by letter with the RS-232 level signal.
Improved the strategy that adopts relatively-stationary password and radio communication channel to carry out authentication between existing automotive anti-theft alarming system remote-control key (1) and the anti-theft and alarm device (5) on the software processing method.When utilizing remote-control key to lock car, release or opening the boot operation, need carry out authentication earlier.The process of authentication be remote-control key (1) with command code be stored in the password in the non-volatility memorizer (2); The radio communication channel of setting up through 2.4GHz wireless communication module (3), wireless communication module antenna (4) sends; Anti-theft and alarm device (5) receives and obtains command code and password from 2.4GHz wireless communication module (9); It and the password that is stored in command adapted thereto sign indicating number in the non-volatility memorizer (8) are compared, the identical then authentication success of password, the anti-theft and alarm device is carried out corresponding instruction; Otherwise the authentication failure, the anti-theft and alarm device is not carried out corresponding instruction.In case wireless channel is occupied or wireless communication link goes wrong; Authentication can also be carried out through wired connection; The authentication authorization and accounting process is: after remote-control key inserts lock; Anti-theft and alarm device (5) detects key and inserts, and sends the request of reading password to remote-control key, and the anti-theft and alarm device can determine to send the request of the password that obtains " release " or " lock car " instruction automatically according to the state of residing " warning " or " non-warning "; The wired connection that this request is set up through three contact interface (16) and three contact interface (18) on the remote-control key of the driver door lock position of anti-theft and alarm device sends out; After remote-control key is received request, will be stored in the password in the non-volatility memorizer (2), pass back through above-mentioned wired connection; The anti-theft and alarm device obtains command code and password from photoelectricity isolation and level switch module (7); It and the password that is stored in the command adapted thereto sign indicating number in the non-volatility memorizer (8) are compared, the identical then authentication success of password, the anti-theft and alarm device is carried out corresponding " lock car " or " release " instruction; Otherwise the authentication failure, the anti-theft and alarm device is not carried out corresponding instruction.
In order to reach better safety; When carrying out authentication through wireless mode; Command code and the command code of password, remote controlled unlocking and the command code that boot is opened in password, remote control that is used to send remote control vehicle locking adopts different channels to transmit respectively with password, and this radio communication channel selects numerical value (0 ~ 126) to leave in the non-volatility memorizer (2) of remote-control key in the non-volatility memorizer (8) with the anti-theft and alarm device.The audio parameter para1 that the selective value of radio communication channel is obtained from sound transducer (11) by microcontroller (14), the temperature parameter para2 that obtains from temperature sensor (12), three environmental parameterss of time parameter para3 of constantly obtaining from real-time clock (13) at car key direction of insertion dish lock obtain through mathematical computations.The used password of authentication; Be that the password of password, the remote controlled unlocking of remote control vehicle locking, password that boot is opened in remote control also are audio parameter para1 that microcontroller (14) is obtained from sound transducer (11), the temperature parameter para2 that obtains from temperature sensor (12), three environmental parameterss of time parameter para3 of constantly obtaining from real-time clock (13) at car key direction of insertion dish lock generate 6 groups 64 key and 6 groups 64 plaintext according to different orders; Be input in the des encryption algorithm and handle; Obtain 3 groups of 128 passwords; Be used for authentication, be stored in after these three passwords generate in the non-volatility memorizer (2) of remote-control key in the non-volatility memorizer (8) with the anti-theft and alarm device.Microcontroller (14) is used situation to password and registers; In case finding any one password was used once; When microcontroller (14) will insert the engine ignition lock in remote-control key (1) next time; Regenerate radio communication channel selective value and password according to the generation method of above-mentioned radio communication channel selective value and the generation method of password; And the wired connection of setting up through three contact interface (18) and three contact interface (6), this radio communication channel selective value and three 128 s' password is sent to remote-control key, be stored in former radio communication channel selective value and three memory spaces that password belongs to.
Particularly; Definite method of radio communication channel value is when 2.4GHz wireless communication module (3), 2.4GHz wireless communication module (9) select nRF24L01 or nRF2401 to be the communication module of core; Microcontroller (14) is regarded as 8 unsigned numbers with audio parameter para1, temperature parameter para2, time parameter para3, generates the communication channel selective value through mathematical computations.Formula is following: send the command code of remote control vehicle locking and channel value chan1=(the audio parameter para1+ temperature parameter para2+ time parameter para3) %126 of password; Send the command code of remote controlled unlocking and channel value chan2=(the audio parameter para1+ temperature parameter para2-time parameter para3) %126 of password, send remote control and open the command code of boot and channel value chan3=(the audio parameter para1-temperature parameter para2+ time parameter para3) %126 of password; Also can confirm the radio communication channel value: can select to send the command code of remote control vehicle locking and the channel value chan1=of password (audio parameter para1-temperature parameter para2-time parameter para3) %126 according to other Arithmetic Formula; Send the command code of remote controlled unlocking and channel value chan2=(the audio parameter para1-temperature parameter para2+ time parameter para3) %126 of password, send remote control and open the command code of boot and channel value chan3=(the audio parameter para1+ temperature parameter para2-time parameter para3) %126 of password.
Use useful effect that the present invention can obtain and be can make the theftproof performance of automobile better, cost is lower, work is more stable, reliability is higher.
Claims (2)
1. the vehicle electronics burglar alarm comprises remote-control key (1) and vehicle-mounted anti-theft and alarm device (5); Described remote-control key comprises microcontroller (20), non-volatility memorizer (2), 2.4GHz wireless communication module (3), wireless communication module antenna (4); Described microcontroller (20), non-volatility memorizer (2), 2.4GHz wireless communication module (3), wireless communication module antenna (4) are electrically connected successively; Described anti-theft and alarm device comprises microcontroller (14), non-volatility memorizer (8), 2.4GHz wireless communication module (9), wireless communication module antenna (10) and door lock, light, loudspeaker, automatic window, engine anti-theft interface (15); Described microcontroller (14), non-volatility memorizer (8), 2.4GHz wireless communication module (9), wireless communication module antenna (10) and door lock, light, loudspeaker, automatic window, engine anti-theft interface (15) are electrically connected successively; It is characterized in that: described remote-control key also comprises three contact interface (18), and this three contact interface (18) is electrically connected with microcontroller (20); Described anti-theft and alarm device also comprises sound transducer (11), temperature sensor (12), real-time clock (13), photoelectricity isolation and level switch module (7), three contact interface (6) of ignition lock position and three contact interface (16) of driver door lock position; Described sound transducer (11), temperature sensor (12), real-time clock (13), photoelectricity isolation level conversion (7) are electrically connected with microcontroller (14); Three contact interface (6) of described ignition lock position, three contact interface (16) of driver door lock position are electrically connected with photoelectricity isolation and level switch module (7).
2. the lock car password of car alarm, unlocking pin and unlatching boot password, these three passwords insert ignition lock parameter constantly by intensity of sound parameter and remote-control key in vehicle interior temperature parameter, the car, generate through the des encryption algorithm; In case one in described these three passwords was used once, these three passwords will be updated when remote-control key inserts ignition lock next time; The instruction of remote-control key transmission lock car, release and unlatching boot and the radio communication channel of password and inequality, the selective value of this radio communication channel also insert ignition lock moment parameter by intensity of sound parameter and remote-control key in said vehicle interior temperature parameter, the car and generate through arithmetical operation; More upgrading the radio communication channel selective value in the new password.
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| CN109685940A (en) * | 2017-10-18 | 2019-04-26 | 中国电信股份有限公司 | Shared bicycle, smart lock and its application method and system, server |
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Application publication date: 20120704 |