CN1752996A - Identity recognition system for keyless entering automobile and its recognition method - Google Patents
Identity recognition system for keyless entering automobile and its recognition method Download PDFInfo
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- CN1752996A CN1752996A CN 200410040779 CN200410040779A CN1752996A CN 1752996 A CN1752996 A CN 1752996A CN 200410040779 CN200410040779 CN 200410040779 CN 200410040779 A CN200410040779 A CN 200410040779A CN 1752996 A CN1752996 A CN 1752996A
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Abstract
The invented identity identification system includes car-mounted control module, identity identification module and unlocking control module. Its identity identification method includes the following steps: car-mounted control module can produce first encrypted information produced by using first encrypted key, serial number, random data and instantaneous data rolling code of counter and transmit the signal with first encrypted information; the identity identification module can be used for receiving said signal to make identity identification, producing second encrypted information produced by using first encrypted information and second encrypted key and transmitting the feedback signal with second encrypted information; the car-mounted control module can be used for receiving said feedback information, making identity identification and controlling unlocking control module to execute unlocking operation.
Description
[technical field]
The present invention relates to automotive field, relate in particular to identification system and recognition methods that kind of no key enters automobile.
[background technology]
At present, automobile has entered people's work, sphere of life more and more.When people require automobile easy to use, the safety of automobile also more and more is subject to the people's attention, singly be multiple mode just to be arranged aspect the automobile entering, develop into remote control driving door from the door of driving with key, recently along with the market demand and development of electronic technology, the device that some distance sensings are unblanked has appearred again, be that vehicle-mounted control module on the automobile is constantly sent low frequency signal, when the car owner who carries the identify label module is near automobile, the identify label module is sensed the low frequency signal that the vehicle-mounted control module is sent, return the signal that has identification cipher information, the vehicle-mounted control module is sensed this signal and by carrying out unlocking action after the identification.This device made things convenient for the car owner drive the door operation, also have certain safety precautions.But still there is following defective in this device: 1) encrypt and adopt simple fixed password to encrypt, be easy to be intercepted and captured, do not have enough safety guarantee.2) whether will enter automobile to the car owner does not judge, near the car owner is passing through the car door of oneself, but when not thinking into the car, as long as the vehicle-mounted control module is still sensed car owner's identify label module on one's body, just carry out unlocking action, if the car owner does not notice car and unblanks that safety to car has just caused threat.3) the vehicle-mounted control module is in emission state always, the storage battery energy in the car is had than lossy, as vehicle commander's time need not, may cause the difficult situation that can't light a fire.4) can not return signal under the situation of dead battery on the identify label module, the vehicle-mounted control module is carried out opened the door.5) do not support a plurality of effective identify label modules to discern simultaneously, as a plurality of effective identify label modules during simultaneously near automobile, the same frequency signal that the identify label module is returned can bump, and the vehicle-mounted control module is identification signal correctly, causes not carrying out and unblanks.
[summary of the invention]
Fundamental purpose of the present invention is exactly the problem of being intercepted and captured easily for the password that solves identify label module in the prior art, a kind of identification system and recognition methods that key enters automobile of not having is provided, carry out dual-identity authentication, and existing fixed part in the password, random partial is arranged again.
A time purpose of the present invention be exactly for solve in the prior art to the car owner whether to enter that automobile not have to judge and automobile on the control module bigger problem that consumes energy, a kind of identification system and recognition methods that key enters automobile of not having is provided, only when the car owner prepared into the car, control module was just sent low frequency signal.
Another purpose of the present invention is exactly the problem that can not open the door under the situation of dead battery on the identify label module in the prior art in order to solve, a kind of identification system and recognition methods that key enters automobile of not having is provided, makes the battery on the identify label module still can return signal under the situation that does not have electricity.
A further object of the present invention is exactly a problem of not supporting in the prior art that in order to solve a plurality of effective identify label modules are identified simultaneously, a kind of identification system and recognition methods that key enters automobile of not having is provided, when making a plurality of effective identify label modules, also can the Be Controlled module discern simultaneously near automobile.
For achieving the above object, the present invention proposes does not a kind ofly have an identification system that key enters automobile, comprise the vehicle-mounted control module that is positioned on the automobile, the control module of unblanking and the identify label module of carrying by the car owner, described vehicle-mounted control module comprises the first signal transmitter unit, first signal receiving unit and first identity authenticating unit, described identify label module comprises the secondary signal receiving element, the second enciphered message generation unit and secondary signal transmitter unit, described secondary signal receiving element is used to receive the signal of first signal transmitter unit emission, the described second enciphered message generation unit is used to produce a feedback signal that comprises identity information and exports the secondary signal transmitter unit to and launch, first signal receiving unit is used to receive feedback signal, export first identity authenticating unit to, unblank by controlling the control module execution of unblanking after the identification, described vehicle-mounted control module also comprises the first encryption key unit, the sequence number generation unit, the randomizer and the first enciphered message generation unit, the described first enciphered message generation unit receives first encryption key data of first encryption key unit output, the random data that the sequence number of sequence number generation unit output and randomizer produce, generation first enciphered message in encryption back exports the first signal transmitter unit to and launches; Described identify label module also comprises second identity authenticating unit, and described second identity authenticating unit is used to verify the signal that described secondary signal receiving element receives and triggers the second enciphered message generation unit and produces second enciphered message and export the secondary signal transmitter unit to and launch.
Described identify label module also comprises the second encryption key unit, second encryption key data to the second enciphered message generation unit is exported in the second encryption key unit, described second identity authenticating unit also exports first enciphered message after the empirical tests to second enciphered message generation unit, produces second enciphered message after the second enciphered message generation unit encryption and exports the secondary signal transmitter unit to and launch.
First and second encryption key is the key code of automobile production manufacturer, is unique to each system.
Described vehicle-mounted control module comprises that also being used for promptly carrying out data with feedback signal of the every reception of vehicle-mounted control module adds one first counter, and the instant data that the described first enciphered message generation unit also receives described first counter are used to produce first enciphered message; Described identify label module comprises that also being used for promptly carrying out data with the signal of a vehicle-mounted control module emission of the every reception of identity identification module adds one second counter, and the instant data that the described second enciphered message generation unit also receives described second counter are used to produce second enciphered message.
As a further improvement on the present invention, the present invention comprises also being positioned at and is used to respond to the human body induction module of human body near car door on the automobile that the induced signal of described human body induction module output triggers the vehicle-mounted control module and transmits.
Preferably, described human body induction module is positioned on the door handle.
The described first signal transmitter unit is a low frequencies, described vehicle-mounted control module also comprises first antenna that links to each other with the first signal transmitter unit, described first antenna is positioned at exterior mirror, also comprise metallic shield, described metallic shield is positioned at close car door one side of rearview mirror, is used to make the low frequency contribution scope just outside car.Described identify label module also comprises second antenna that links to each other with secondary signal receiving element input end, and described second antenna comprises three coils that are respectively applied for reception X-direction, Y direction and Z-direction signal.
Further improve as of the present invention, described identify label module also comprises the charging capacitor that is connected between secondary signal receiving element and the ground, the hot end of described charging capacitor also links to each other with the power end of second identity authenticating unit, the second enciphered message generation unit and secondary signal transmitter unit respectively, and described secondary signal transmitter unit is a low frequencies.
As another improvement of the present invention, described identify label module also comprises the delay unit that is used for feedback signal delay adjustments time of will launch.This delay unit can respond the triggering of the signal that the secondary signal receiving element receives, and controls the second enciphered message generation unit delay adjustments and produces second enciphered message after the time; Also can respond the triggering of the signal that the secondary signal receiving element receives, control secondary signal transmitter unit delay adjustments is launched feedback signal after the time.
For achieving the above object, the present invention proposes does not a kind ofly have a personal identification method that key enters automobile, may further comprise the steps:
1) emission of vehicle-mounted control module is loaded with the signal that the random data that is produced by first encryption key data, sequence number and randomizer is encrypted first enciphered message of back generation;
2) identify label module receives above-mentioned signal and carries out the authentication first time;
3) identify label module is passed through to produce second enciphered message after the authentication for the first time;
4) identify label module emission is loaded with the feedback signal of second enciphered message;
5) the vehicle-mounted control module receives and feedback signal is carried out the authentication second time;
6), control the control module execution of unblanking and unblank by after the authentication for the second time.
Described second enciphered message of step 3) is by producing after first enciphered message and the second encryption key data encryption.
The instant data that also comprise first counter in first enciphered message in described step 1), the data of described first counter are promptly carried out data with feedback signal of the every reception of vehicle-mounted control module and are added one; The instant data that also comprise second counter in second enciphered message in described step 3), the data of described second counter are promptly carried out data with the signal of a vehicle-mounted control module emission of the every reception of identity identification module and are added one.
The authentication second time in the described step 5) comprises the step that the data with second counter of the preceding once same sequence number of the data of this second counter that receives and record compare, if the data of second counter that this receives are greater than the data of second counter of preceding once same sequence number, then by authentication for the second time.。
As a further improvement on the present invention, comprised also that before described step 1) human body induction module triggers the step that the vehicle-mounted control module is started working.
Further improve as of the present invention, when the vehicle-mounted control module does not receive the feedback signal of identify label module within a certain period of time, the vehicle-mounted control module adds the order that is changed into the radio-frequency (RF) identification pattern by the normal communication pattern in the signal of emission, the identify label module changes the low frequencies feedback signal into after receiving this signal.
As another improvement of the present invention, before described step 4), postpone the time of setting according to setting.
The invention has the beneficial effects as follows: 1) the present invention carries out twice authentication, both comprised fixed part in each enciphered message, as first encryption key data, include the random data that randomizer produces again, drawing through the rolling code algorithm, second enciphered message is to add second encryption key data to draw by cryptographic algorithm on the basis of first enciphered message again, so even encryption method of the present invention is intercepted and captured, also be not easy to be decrypted.2) the instant data of adding counter in first enciphered message and second enciphered message, and counter is signal of every reception, numerical value just increases one, so the data of the each output of counter are all different, thereby first enciphered message in the signal of each emission or second enciphered message are also different, make password tighter, be difficult to decode, thereby also make automobile safer.3) increased human body induction module, and human body induction module is installed on the door handle, only when preparing to enter automobile, staff contact or close door handle, human body induction module just sends signal to the vehicle-mounted control module, makes vehicle-mounted control module emission low frequency signal.4) design has charging capacitor on the identify label module, when the dead battery on the identify label module, charging capacitor can be by receiving the emission of vehicle-mounted control module the energy of low frequency signal charge, thereby each several part power supply for the identify label module, and, when the dead battery on the identify label module, enter the radio-frequency (RF) identification pattern by software design, can carry out low-yield emission feedback signal, thereby finish the identification that enters automobile.5) design has delay unit on the identify label module, make feedback signal postpone to launch again behind the certain hour, when a plurality of effective identify label module, each identify label module has self specific time delay, the feedback signal of different identify label modules postpones the different time, thereby avoided a plurality of effective identify label modules because of launching the collision that feedback signal takes place simultaneously, a plurality of effective identify label module that the vehicle-mounted control module can be discerned enter the effective coverage simultaneously.
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 represents the block scheme of a kind of embodiment of the present invention;
Fig. 2 represents the functional-block diagram that transmits and receives of a kind of embodiment of the present invention;
Fig. 3 represents cryptographic algorithm process flow diagram of the present invention;
Fig. 4 represents human body induction module fundamental diagram of the present invention;
Fig. 5 represents the structural drawing of human body induction module of the present invention sensing part;
Fig. 6 represents the synoptic diagram of the antenna of identify label module of the present invention;
Fig. 7 represents that induction of the present invention is opened the door and the radio-frequency (RF) identification process flow diagram;
Fig. 8 represents anticollision functional software process flow diagram of the present invention.
[embodiment]
As most preferred embodiment of the present invention, comprise human body induction module, vehicle-mounted control module, identify label module and the control module of unblanking, as shown in Figure 1, 2.Human body induction module links to each other with the vehicle-mounted control module, carries out radio communication between vehicle-mounted control module and the identify label module.Human body induction module is positioned at above the door handle, and human body induction module is sensed the someone when pulling a cart door handle, sends trigger pip to the vehicle-mounted control module.The vehicle-mounted control module comprises the first signal transmitter unit, the first encryption key unit, the sequence number generation unit, randomizer, first counter, the first enciphered message generation unit, first signal receiving unit and first identity authenticating unit, after the vehicle-mounted control module receives trigger pip, the first enciphered message generation unit receives first encryption key data of first encryption key unit output, the sequence number of sequence number generation unit output, the random data that randomizer produces and the instant data of first counter, rolling code encryption back generation first enciphered message exports the first signal transmitter unit (being the low channel of 134.2KHz in the present embodiment) to and launches; The identify label module comprises the secondary signal receiving element, second identity authenticating unit, the second encryption key unit, second counter, the second enciphered message generation unit and secondary signal transmitter unit, the secondary signal receiving element receives the low frequency signal of first signal transmitter unit emission, first enciphered message in the signal that second identity authenticating unit checking secondary signal receiving element receives, and export this first enciphered message to second enciphered message generation unit, the second enciphered message generation unit also receives the instant data that second encryption key data and second counter are exported in the second encryption key unit, the second enciphered message generation unit is with first enciphered message, produce second enciphered message after the instant data rolling code encryption of second encryption key data and second counter and export secondary signal transmitter unit (being the 433MHz hf channel in the present embodiment) to, the secondary signal transmitter unit will be loaded with the high frequency feedback signal of second enciphered message and launch; First signal receiving unit receives the high frequency feedback signal, export first identity authenticating unit to, first identity authenticating unit reads first enciphered message that the first enciphered message generation unit produces, second encryption key data good according to storage formerly calculates second enciphered message, with second enciphered message that calculates and second enciphered message contrast that receives, promptly carry out authentication, control the control module execution of unblanking by the errorless back of authentication affirmation and unblank.
In the present embodiment, on the key, one has an identify label module on the key with the identify label module making, and the rolling code algorithm software process flow diagram of present embodiment as shown in Figure 3.
The authentication process of native system is complicated proof procedure.First and second encryption key is respectively the coding password of a 64Bit, and each identify label module of native system (being every key) all has a unique sequence number.And can store a plurality of sequence numbers in the vehicle-mounted control module, and concrete quantity depends on what identify label modules native system has, the sequence number of each identify label module is all inequality.Encryption key is to need a key code using in the cryptographic algorithm, and it is fixed that this is come by production firm.Radiating portion is encrypted and the receiving unit deciphering all needs to use this encryption key, otherwise can't obtain correct data.As long as adopt native system, first encryption key of all automobiles of same automobile vendor all is the same.With first encryption key, sequence number and the information (for example unblanking or locking information) that need send calculate the data of actual transmission by the rolling code cryptographic algorithm.Adopt a counter to calculate the data that sent on the native system software design.After the each emission of key part one secondary data all the counter to itself add one, the vehicle-mounted control module receives the data that key partly launches and also the counter of itself is added one.Key is launched data at every turn and all the value of counter is included in the raw data, and the Counter Value when at every turn launching because of key is all bigger than the last time, encrypts the back by cryptographic algorithm like this and makes that the data of each emission are all different.After car body control module receives data, Counter Value that launches and the Counter Value that received last time are compared, if the Counter Value that launches is less than or equal to the Counter Value that received last time, it is illegal that system is then thought.Even people's illegal lock-on signal when the car owner drives is arranged like this, also can't open the door, because the Counter Value of emission this moment has equaled the Counter Value of vehicle-mounted control module stores by the signal that emission is captured.So each data that send all are unduplicated, and system can discern the data that sent automatically, and the data that sent are no longer handled.The value of counter is hidden in the data of transmission, is to read as no encryption key.Randomizer produces random number and normal data is together encrypted, and strengthens the confidentiality of data.This cipher mode also can have been avoided the people illegally to catch transmitting, attempt to reach the purpose of opening the door by launching same signal.This Counter Value is a very large numerical value, if emission in a day 1000 times can guarantee not repeat in 10 years.The complexity of cryptographic algorithm itself and reliability have guaranteed that Counter Value is difficult to analyzed come out, and this must be based upon on the basis that encryption key holds in close confidence certainly.So encryption key is the key code of automobile production manufacturer, the security of native system there is crucial effects.First encryption key and second encryption key among Fig. 2 need hold in close confidence, can not reveal.First encryption key and second encryption key are coding inequality, and the purpose of doing like this is the security for strengthening system.
The principle of the human body induction module of present embodiment such as Fig. 4 have adopted two strip bonding jumpers to do electrode in the door handle 7, i.e. second bonding jumper 2 and the 3rd bonding jumper 3.Two bonding jumpers are embedded in handle inside, and the surface near staff contact handle one side has no effect to the door handle outward appearance.Second bonding jumper, 2, the three bonding jumpers 3 are attached on a monoblock first bonding jumper 1, then first bonding jumper 1 are attached to handle 7 inside, as shown in Figure 5.Do not have between second bonding jumper 2 and first bonding jumper, 1, the three bonding jumper 3 and first bonding jumper 1 and be electrically connected.Handle one side of copper-surfaced paper tinsel, surface treatment need be adopted non-conducting material.First bonding jumper, 1, the second bonding jumper 2 and the 3rd bonding jumper 3 are drawn with single core coaxial shielding cable 5,6,4 respectively, link to each other with human body sensing IC 8.Human body sensing IC 8 sends sine wave to the three bonding jumpers 3 of fixed frequency 120KHz by shielded cable 4, mutual electromagnetic field inductive effect by parallel wire on second bonding jumper 2 produces the identical sine wave of frequency, deliver to human body sensing IC 8 by shielded cable 6, human body sensing IC 8 judges whether someone's door handle of pulling a cart according to the variation of this sinusoidal wave amplitude.Because people's health has good electrical conductivity, when removing to pull a cart door handle with hand, changed the stray capacitance between second bonding jumper 2 and the 3rd bonding jumper 3, sinusoidal wave amplitude on second bonding jumper 2 has significant variation, after human body sensing IC 8 detects this variation, trigger the vehicle-mounted control module and start working, the emission low frequency signal.Human body sensing IC 8 sends sine wave to the first bonding jumper 1 that is all 120KHz, and as a kind of shielding measure, the influence of the metallics of maskable handle opposite side avoids interference.First bonding jumper 1, second bonding jumper 2 and 3 pairs of materials of the 3rd bonding jumper do not have specific (special) requirements, and common aluminium foil, Copper Foil just can reach good effect.
On technology, first bonding jumper, 1, the second bonding jumper 2 and the 3rd bonding jumper 3 use type metal line, difficult drop-off.Second bonding jumper 2 and the 3rd bonding jumper 3 are made corresponding arc according to handle shapes, and spacing between the two is 3-4mm.Second bonding jumper 2 and the 3rd bonding jumper 3 are printed on first bonding jumper 1, but are not electrically connected with first bonding jumper 1, and promptly second bonding jumper 2 and the 3rd bonding jumper 3 are that nonmetallic materials are made in that side of first bonding jumper 1.First bonding jumper 1 equally also is to adopt the mode of type metal line to be imprinted on the door handle 7.Second bonding jumper 2 and the 3rd bonding jumper 3 are to be used for responding to the approaching of hand.First bonding jumper 1 has sent the sine wave of 120KHz by human body sensing IC 8, the metallics influence of maskable door handle 7 opposite sides.The side that first bonding jumper 1 is attached to door handle also is to use nonmetallic materials to make.First bonding jumper 1, second bonding jumper 2 and the 3rd bonding jumper 3 all use single core coaxial cable to draw, the undesired signal in the maskable automobile.
The first signal transmitter unit is the low frequencies passage, and is less because of the distance of reaction of low frequency so design has first antenna 9, therefore will be used to receive and first antenna 9 of launching low frequency signal is installed in the automobile rearview mirror.Rearview mirror is in body exterior, is not installed in the car, mainly is to avoid the shield effectiveness of vehicle body itself to slacken low frequency signal.Do not have at key under the situation of electricity, very near because of the radio-frequency (RF) identification distance, have only 5-10cm.Be contained in and also make things convenient for the car owner to operate on the rearview mirror.Considering the convenience of inductive effects and operation, should be a proper installation site in the rearview mirror.After the car owner locks into the car, and car outward the someone trigger human body induction module.Because of car owner's identify label module on one's body still is in the induction range, may cause unblanking.For avoiding this kind situation, remove and on software design, guarantee the emission of car owner at the low frequency signal of back shielding into the car.When the design low-frequency antenna, also take into full account possible illegally entering.The scope of antenna emission only outside car, can't cover scope in the car, guarantees can illegally entering of unauthorized personnel not occur because of fortuitous event.Adjust the installation direction of first antenna 9 and partly making a radome near automobile inner side, can guarantee that low frequency signal is only to the outer scope emission of car, radome need not to install, adopt the technology of type metal, will be in rearview mirror all print the very thin metal level of last layer near car door one side, and with this metal level ground connection as radome.Coil uses silica gel directly to stick on the backsight back lens surface.For reaching distance of reaction far away, under the situation that volume allows, as much as possible first antenna, 9 areas are done greatly.Native system adopts the square coil of 150mm * 100mm, and according to the mounting bracket in the rearview mirror, coil shape has adjustment slightly, is not the rectangle of a standard.Coil is close to backsight eyeglass back, and distance of reaction can reach 2m.
Identify label inside modules design has second antenna, second antenna to comprise three coils, i.e. first coil 10, second coil 11 and tertiary coil 12, and the inner because volume of key is limit, so the design of three coils is even more important.For reaching good distance of reaction and directivity, use three coils as low-frequency antenna, its putting position is as shown in Figure 6.First coil 10, second coil 11 are square iron core coil among Fig. 6, and tertiary coil 12 is the circular hollow coil.The direction that first coil 10 and second coil 11 are put constitutes an angle of 90 degrees.First coil 10, second coil 11 and tertiary coil 12 are respectively applied for the signal that receives X-axis, Y-axis, Z-direction.Such disposing way can strengthen the distance of low frequency induction, and three coils constitute a dimensional antenna, can guarantee key no matter go the person where, good induction sensitivity is all arranged, strengthened the stability of low frequency signal.The coil of adjusting key inside reaches identical tuning-points with the interior coil of automobile rearview mirror, and signal is handled through amplifying circuit, and the low frequency induction distance can reach 2m.
Low frequency signal operating distance is near, can't realize the long-distance remote control function, so under normal circumstances all adopt identify label module emission high-frequency signal to give the mode of vehicle-mounted control module.When vehicle-mounted control module emission low frequency signal, in the situation of key battery electric power abundance, the identify label module is returned high-frequency signal and is given the vehicle-mounted control module.But because of high-frequency emission needs bigger electric current, under the situation of the button cell power shortage in key, can't return high-frequency signal, can't operate the process of opening the door of finishing routinely.The present invention utilizes the radio-frequency technique principle to solve this problem at this.Process flow diagram as shown in Figure 7, under the situation of power shortage, first antenna 9 emission low frequency signals, vehicle-mounted control module certain hour can't receive high-frequency signal, to change the emission low-frequency data, comprise the order of changing communication mode in the data, change the mode communication of radio-frequency (RF) identification by normal communication into.The car owner needs the key automobile rearview mirror of moving close to, and second antenna on the identify label module receives low frequency energy can be to charging capacitor 13 chargings.The circuit supply of identify label inside modules is given in charging capacitor 13 charging backs, identify label inside modules system receives the order of change communication mode, built-in system is started working, after finishing authentication, no longer, change into by low channel on the identify label module and second antenna emission low frequency signal to the first antenna 9 by hf channel emission data.After the low frequency receiver module of vehicle-mounted control module receives this low frequency signal, export first identity authenticating unit to, after authentication, control the control module of unblanking and carry out unlocking action.The benefit of this design is, even the car owner has forgotten timely replacing battery, also can open the door smoothly, fully ensured car owner's interests.
The corresponding legal key more than two or two of automobile possibility enters the low frequency induction scope to legal key (being a plurality of legal identify label modules) as many.Because many keys, are unblanked as launching the high-frequency signal Control of Automobile simultaneously through after the authentication by sensing low frequency signal, the result causes the same frequency signal collision, and automotive interior vehicle-mounted control module can't correctly be discerned high-frequency signal.Therefore the present invention adopts time-sharing procedure to realize signal anticollision function, but guarantees under the above situation still normal door.System design allows an automobile that four legal key are arranged.Each legal key is distributed ID number: first key, second key, the 3rd key, the 4th key.Enter induction range simultaneously as these four keys, after triggering by human body induction module, low frequency signal begins emission.Four keys receive low frequency signal simultaneously.But in order to prevent the high-frequency signal collision, four keys can not be launched high-frequency signal simultaneously.According to ID number of every key, distribute the time period of high-frequency emission in the present invention's design.First key is in the most preceding time period, and the 4th key is in the last time period, handle low frequency signal after, first key is launched high-frequency data in first time period, and the like, second key, the 3rd key after the 4th key prolongs special time, is promptly launched high-frequency data in the time period separately.This can realize by a delay unit device, for example realizes by an impulse meter, is illustrated in figure 8 as by impulse meter and realizes the process flow diagram of different keys at different time period emission high frequency feedback signals.
The high-frequency emission that staggered so in time can not interfere with each other.Each time period has only tens ms, and for the car owner, this time can ignore.
Except the function that induction is unblanked, native system still has the function of the remote button remote control of general-utility car telepilot, meets people's use habit.Even, still can open the door by special mode of operation in the situation of the identify label modular battery power shortage of key inside.This particular design of native system has guaranteed can can't not open the door because of the car owner changes battery.
Claims (16)
1. one kind is not had the identification system that key enters automobile, comprise the vehicle-mounted control module that is positioned on the automobile, the control module of unblanking and the identify label module of carrying by the car owner, described vehicle-mounted control module comprises the first signal transmitter unit, first signal receiving unit and first identity authenticating unit, described identify label module comprises the secondary signal receiving element, the second enciphered message generation unit and secondary signal transmitter unit, described secondary signal receiving element is used to receive the signal of first signal transmitter unit emission, the described second enciphered message generation unit is used to produce a feedback signal that comprises identity information and exports the secondary signal transmitter unit to and launch, first signal receiving unit is used to receive feedback signal, export first identity authenticating unit to, unblank by controlling the control module execution of unblanking after the identification, it is characterized in that: described vehicle-mounted control module also comprises the first encryption key unit, the sequence number generation unit, the randomizer and the first enciphered message generation unit, the described first enciphered message generation unit receives first encryption key data of first encryption key unit output, the random data that the sequence number of sequence number generation unit output and randomizer produce, generation first enciphered message in encryption back exports the first signal transmitter unit to and launches; Described identify label module also comprises second identity authenticating unit, and described second identity authenticating unit is used to verify the signal that described secondary signal receiving element receives and triggers the second enciphered message generation unit and produces second enciphered message and export the secondary signal transmitter unit to and launch.
2. no key as claimed in claim 1 enters the identification system of automobile, it is characterized in that: described identify label module also comprises the second encryption key unit, second encryption key data to the second enciphered message generation unit is exported in the second encryption key unit, described second identity authenticating unit also exports first enciphered message after the empirical tests to second enciphered message generation unit, produces second enciphered message after the second enciphered message generation unit encryption and exports the secondary signal transmitter unit to and launch.
3. no key as claimed in claim 2 enters the identification system of automobile, it is characterized in that: described vehicle-mounted control module comprises that also being used for promptly carrying out data with feedback signal of the every reception of vehicle-mounted control module adds one first counter, and the instant data that the described first enciphered message generation unit also receives described first counter are used to produce first enciphered message; Described identify label module comprises that also being used for promptly carrying out data with the signal of a vehicle-mounted control module emission of the every reception of identity identification module adds one second counter, and the instant data that the described second enciphered message generation unit also receives described second counter are used to produce second enciphered message.
4. enter the identification system of automobile as each described no key in the claim 1 to 3, it is characterized in that: comprise also being positioned at being used to respond to the human body induction module of human body on the automobile that the induced signal of described human body induction module output triggers the vehicle-mounted control module and transmits near car door.
5. no key as claimed in claim 4 enters the identification system of automobile, it is characterized in that: described human body induction module is positioned on the door handle.
6. enter the identification system of automobile as each described no key in the claim 1 to 3, it is characterized in that: the described first signal transmitter unit is a low frequencies, described vehicle-mounted control module also comprises first antenna that links to each other with the first signal transmitter unit, described first antenna is positioned at exterior mirror, also comprise metallic shield, described metallic shield is positioned at close car door one side of rearview mirror, is used to make the low frequency contribution scope just outside car.
7. no key as claimed in claim 6 enters the identification system of automobile, it is characterized in that: described identify label module also comprises second antenna that links to each other with secondary signal receiving element input end, and described second antenna comprises three coils that are respectively applied for reception X-direction, Y direction and Z-direction signal.
8. enter the identification system of automobile as each described no key in the claim 1 to 3, it is characterized in that: described identify label module also comprises the charging capacitor that is connected between secondary signal receiving element and the ground, the hot end of described charging capacitor also links to each other with the power end of second identity authenticating unit, the second enciphered message generation unit and secondary signal transmitter unit respectively, and described secondary signal transmitter unit is a low frequencies.
9. enter the identification system of automobile as each described no key in the claim 1 to 3, it is characterized in that: described identify label module also comprises the delay unit that is used for feedback signal delay adjustments time of will launch.
10. one kind is not had the personal identification method that key enters automobile, it is characterized in that may further comprise the steps:
1) emission of vehicle-mounted control module is loaded with the signal that the random data that is produced by first encryption key data, sequence number and randomizer is encrypted first enciphered message of back generation;
2) identify label module receives above-mentioned signal and carries out the authentication first time;
3) identify label module is passed through to produce second enciphered message after the authentication for the first time;
4) identify label module emission is loaded with the feedback signal of second enciphered message;
5) the vehicle-mounted control module receives and feedback signal is carried out the authentication second time;
6), control the control module execution of unblanking and unblank by after the authentication for the second time.
11. no key as claimed in claim 10 enters the personal identification method of automobile, it is characterized in that: described second enciphered message of step 3) is by producing after first enciphered message and the second encryption key data encryption.
12. no key as claimed in claim 11 enters the personal identification method of automobile, it is characterized in that: also comprise the instant data of first counter in first enciphered message in described step 1), the data of described first counter are promptly carried out data with feedback signal of the every reception of vehicle-mounted control module and are added one; The instant data that also comprise second counter in second enciphered message in described step 3), the data of described second counter are promptly carried out data with the signal of a vehicle-mounted control module emission of the every reception of identity identification module and are added one.
13. no key as claimed in claim 12 enters the personal identification method of automobile, it is characterized in that: the authentication second time in the described step 5) comprises the step that the data with second counter of the preceding once same sequence number of the data of this second counter that receives and record compare, if the data of second counter that this receives are greater than the data of second counter of preceding once same sequence number, then by authentication for the second time.
14. enter the personal identification method of automobile as each described no key in the claim 10 to 13, it is characterized in that: comprised also that before described step 1) human body induction module triggers the step that the vehicle-mounted control module is started working.
15. enter the personal identification method of automobile as each described no key in the claim 10 to 13, it is characterized in that: when the vehicle-mounted control module does not receive the feedback signal of identify label module within a certain period of time, the vehicle-mounted control module adds the order that is changed into the radio-frequency (RF) identification pattern by the normal communication pattern in the signal of emission, the identify label module changes the low frequencies feedback signal into after receiving this signal.
16. enter the personal identification method of automobile as each described no key in the claim 10 to 13, it is characterized in that: before described step 4), postpone time of setting.
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| CNB2004100407796A CN100382099C (en) | 2004-09-24 | 2004-09-24 | Identity recognition system for keyless entering automobile and its recognition method |
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Assignee: BYD Automobile Co., Ltd Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2009.3.9 to 2014.12.10 contract change Contract record no.: 2009440000208 Denomination of invention: Identity recognition system for keyless entering automobile and its recognition method Granted publication date: 20080416 License type: Exclusive license Record date: 2009.3.23 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.9 TO 2014.12.10; CHANGE OF CONTRACT Name of requester: BYD AUTOMOBILE CO., LTD. Effective date: 20090323 |