CN102890839A - Control method for intelligent key device of automobile back door - Google Patents
Control method for intelligent key device of automobile back door Download PDFInfo
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- CN102890839A CN102890839A CN2012103870623A CN201210387062A CN102890839A CN 102890839 A CN102890839 A CN 102890839A CN 2012103870623 A CN2012103870623 A CN 2012103870623A CN 201210387062 A CN201210387062 A CN 201210387062A CN 102890839 A CN102890839 A CN 102890839A
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Abstract
The invention discloses a control method for an intelligent key device of an automobile back door, comprising the following steps that: when an automobile is unlocked, an automobile body control unit receives an automobile back door switch command and then sends an automobile back door switch signal to an intelligent key control module; then, the intelligent key control module triggers an automobile back door low frequency antenna to detect an intelligent key; then the automobile back door low frequency antenna feeds back the detection result about whether the intelligent key exists to the intelligent key control module; the intelligent key control module judges whether to send the detection result to the automobile body control unit according to the detection result about whether the intelligent key exists to control the locking or unlocking of the automobile back door. When the automobile is unlocked, the automobile back door low frequency antenna is used for detecting whether the intelligent key exists in the automobile back door area. Thus, the detection of the automobile intelligent key is greatly optimized and the detection efficiency is increased. Misjudgment to the intelligent key is avoided and whether to execute the operational command of locking or unlocking is judged.
Description
Technical field
The invention belongs to the Vehicle Electronic Control field, be specifically related to a kind of control method of automobile back door Intelligent key device.
Background technology
At present, the technology that adopts of vehicle anti-theft mainly contains three kinds.Be the engine anti-theft technology that starts from the beginning of the nineties in first, this technology is used the most general the America and Europe, and Countries rules mandatory requirement vehicle is equipped with engine anti-theft; The second is the remote-control anti-theft technology that starts from the end of the nineties, and this technology can realize Remote Control Vehicle in tens meters scope, and for the user brings certain facility, it has long-distance remote control (being RKE:Remote Keyless Entry) function; The third is the intelligent key system that starts from the beginning of this century, and it is the PKS function without key entered function (being PKE:Passive Keyless Entry) and passive type without the key startup that this technology possesses passive type.
RKE mainly realizes by the vehicle remote control technology, usually operating distance all requires more than 10 ~ 15 meters, this technology is the radiofrequency signal of initiatively being launched characteristic frequency by portable induction telechiric device to cell on wheels equipment, radiofrequency signal contains the information such as the identification code, random number, straighforward operation of portable induction telechiric device, and cell on wheels equipment receives and sends to relevant controller after the radiofrequency signal and process and carry out corresponding operating.
PKE and PKS function reaction are usually in 2 ~ 3 meters, when portable induction telechiric device is within cell on wheels equipment short range, if receive the effective instruction that cell on wheels equipment sends, portable induction telechiric device just can respond by emitting radio frequency signal, radiofrequency signal contains the information such as identification code of portable induction telechiric device, and cell on wheels equipment sends to relevant telepilot processing and carries out corresponding operation after receiving radiofrequency signal.
Along with automotive engineering development and progress, people are also more and more higher to the Based Intelligent Control demand of automobile, the tailgate intelligence control system of at present vehicle outfit, major part is comprised of car body controller, telepilot etc., pulling tailgate handle was realized opening after opening and closing of back door only depended on remote control or middle control release, did not satisfy people far away to the demand of automobile intelligent control.And, even automobile back door has used PKE and PKS function, but for the tailgate of automobile trunk unblank and locking can not realize effective intelligent decision, easily make mistakes, such as not carrying out in antitheft work or the key lock car etc., can't accomplish effective Based Intelligent Control.
Summary of the invention
Technical matters to be solved by this invention is for above shortcomings in the prior art, and a kind of control method of automobile back door Intelligent key device is provided.This control method can be optimized the testing process for the automobile intelligent key greatly, improves detection efficiency, avoids disconnected to the erroneous judgement of Intelligent key, and makes and in time reasonably judge whether automobile back door should carry out the operational order of locking or release.
The invention provides a kind of control method of automobile back door Intelligent key device, wherein, automobile back door Intelligent key device comprises: vehicle body control unit, Intelligent key, Intelligent key control module, automobile back door low-frequency antenna and car room low-frequency antenna, wherein, described automobile back door low-frequency antenna detects outside the automobile trunk and the car room Intelligent key, described car room low-frequency antenna detects the car room Intelligent key, and the control method of described automobile back door Intelligent key device comprises:
When automobile is in released state, described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal after receiving described automobile back door switch command, then described Intelligent key control module excites described automobile back door low-frequency antenna to detect described Intelligent key, then described automobile back door low-frequency antenna testing result that described Intelligent key is had or not feeds back to described Intelligent key control module, the testing result that described Intelligent key control module has or not according to Intelligent key judges whether described testing result is sent to described vehicle body control unit, thereby controls locking or the release of described automobile back door.Described car room refers in the Automobile.
Preferably, if described automobile back door low-frequency antenna does not detect described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result, described Intelligent key control module does not send to described vehicle body control unit with described testing result, thereby controls the not locking of described automobile back door.
Preferably, if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna;
Described vehicle body control unit detects automobile again and whether satisfies the condition of setting up defences, if satisfy the condition of setting up defences, then described vehicle body control unit is controlled described automobile back door locking.
Preferably, if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna;
Described vehicle body control unit detects automobile again and whether satisfies the condition of setting up defences, if do not satisfy the condition of setting up defences, then described vehicle body control unit is controlled the not locking of described automobile back door.
Preferably, the described condition of setting up defences is: (1) automobile is in flameout state; (2) the whole closing of the doors of automobile; (3) the automobile front chamber door is closed; (4) automobile back door is closed.
Preferably, if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna detects described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna, and then described vehicle body control unit is controlled the not locking of described automobile back door.
Preferably, the control method of described automobile back door Intelligent key device also comprises:
When automobile is in blocking, described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal after receiving described automobile back door switch command, then described Intelligent key control module excites described car room low-frequency antenna to detect described Intelligent key, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described automobile back door low-frequency antenna again,
(1) if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna, and then described vehicle body control unit is controlled described automobile back door release;
(2) if described automobile back door low-frequency antenna does not detect described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna, and then described vehicle body control unit is controlled the not release of described automobile back door.
Preferably, the control method of described automobile back door Intelligent key device also comprises:
When automobile is in blocking, described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal after receiving described automobile back door switch command, then described Intelligent key control module excites described car room low-frequency antenna to detect described Intelligent key, described car room low-frequency antenna detects described Intelligent key, and then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module does not send to described vehicle body control unit with described testing result, thereby controls the not release of described automobile back door.
Preferably, described automobile back door is that automobile layback tailgate or automobile are just drawing tailgate.
Preferably, when described vehicle body control unit was controlled the operation of described tailgate execution locking or release, automobile sent warning.
When automobile is in released state, detect the automobile back door zone by the automobile back door low-frequency antenna first and have or not Intelligent key, can greatly optimize the testing process for the automobile intelligent key, improve detection efficiency, avoid disconnected to the erroneous judgement of Intelligent key, and make and in time reasonably judge whether automobile back door should carry out the operational order of locking or release, thereby prevent from opening by mistake automobile back door and avoid Intelligent key is locked in the car, thus security and the anti-theft of automobile back door locking improved.
Description of drawings
Fig. 1 is the automobile back door Intelligent key installation drawing in the embodiment of the invention;
Fig. 2 is car body controller internal signal block scheme.
Embodiment
For making those skilled in the art understand better technical scheme of the present invention, below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment
The present embodiment provides a kind of control method of automobile back door Intelligent key device, wherein, automobile back door Intelligent key device comprises: vehicle body control unit, Intelligent key, the Intelligent key control module, automobile back door low-frequency antenna and car room low-frequency antenna, wherein, described automobile back door low-frequency antenna detects outside the automobile trunk and the car room Intelligent key, described car room low-frequency antenna detects the car room Intelligent key, the control method of described automobile back door Intelligent key device comprises: when automobile is in released state, described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal after receiving described automobile back door switch command, then described Intelligent key control module excites described automobile back door low-frequency antenna to detect described Intelligent key, then described automobile back door low-frequency antenna testing result that described Intelligent key is had or not feeds back to described Intelligent key control module, the testing result that described Intelligent key control module has or not according to Intelligent key judges whether described testing result is sent to described vehicle body control unit, thereby controls locking or the release of described automobile back door.
When automobile is in released state, detect the automobile back door zone by the automobile back door low-frequency antenna first and have or not Intelligent key, can greatly optimize the testing process for the automobile intelligent key, improve detection efficiency, avoid disconnected to the erroneous judgement of Intelligent key, and make and in time reasonably judge whether automobile back door should carry out the operational order of locking or release, thereby prevent from opening by mistake automobile back door and avoid Intelligent key is locked in the car, thus security and the anti-theft of automobile back door locking improved.
Preferably, when automobile is in released state, press tailgate switch control button, this moment, vehicle body control unit judged that car load is in released state after receiving described automobile back door switch command, so the order that the tailgate switch is carried out is the car load locking.Described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal, after described Intelligent key control module receives the automobile back door switching signal, excite described automobile back door low-frequency antenna to detect described Intelligent key, this automobile back door low-frequency antenna produces a surveyed area at tail of the body, if detect Intelligent key (this zone is search coverage and car inner region outside the car of automobile back door low-frequency antenna) in automobile back door low-frequency antenna surveyed area, if described automobile back door low-frequency antenna does not detect described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result, described Intelligent key control module does not send to described vehicle body control unit by the mode of CAN signal with described testing result, the not locking of described automobile back door, automobile back door and four can't be by lockings.The state of this moment illustrates that the operator who presses the tailgate switch does not carry Intelligent key, and Intelligent key may be in Automobile or away from the zone of automobile, so not locking of automobile back door under this kind state.Because this moment, the operator did not carry Intelligent key, if carry out locking, may cause so in the Intelligent key lock car, this moment, the operator can return to reexamine in the car whether can find Intelligent key, carried out this step operation again.
The Intelligent key control module excites low-frequency antenna to detect Intelligent key, and wherein this Intelligent key is and the normal Intelligent key that mates of car load.If the Intelligent key control module wants to survey the Intelligent key that whether has with car load coupling in the investigative range of automobile back door low-frequency antenna the time, at first the Intelligent key control module sends a low frequency signal to the automobile back door low-frequency antenna, the automobile back door low-frequency antenna will form a search coverage at tail of the body, when Intelligent key enters in the range of signal of automobile back door low-frequency antenna, wake-up signal will make Intelligent key change normal operating conditions over to from holding state, thereby receive the sweep signal from the automobile back door low-frequency antenna, then by the RF(radio frequency) send the data (comprising ID and operation code) of process encryption to the Intelligent key control module, in the search coverage of automobile back door low-frequency antenna, finish the authentication between Intelligent key control module and the Intelligent key, enter the interior information of automobile back door low-frequency antenna search coverage thereby make the Intelligent key control module obtain Intelligent key.The information exchange that the Intelligent key control module enters search coverage with Intelligent key is crossed the CAN signal and is sent to car body controller, the unlatching of Intelligent control automobile tailgate behind the car body controller collection signal, if Intelligent key does not enter the search coverage of automobile back door low-frequency antenna, then can't finish the authentication between Intelligent key control module and the Intelligent key.This goes on foot safety certification, owing to every data the encryption of Intelligent key are unique, can greatly improve the Intelligent key security like this, compares and traditional key, and Intelligent key is difficult to be replicated.
Preferably, when automobile is in released state, press tailgate switch control button, this moment, vehicle body control unit judged that car load is in released state after receiving described automobile back door switch command, so the order that the tailgate switch is carried out is the car load locking.Described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal, after described Intelligent key control module receives the automobile back door switching signal, excite described automobile back door low-frequency antenna to detect described Intelligent key, this automobile back door low-frequency antenna produces a surveyed area at tail of the body, if detect Intelligent key (this zone is search coverage and car inner region outside the car of automobile back door low-frequency antenna) in automobile back door low-frequency antenna surveyed area, if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result; The state of this moment illustrates that Intelligent key is outside car.
Described Intelligent key control module is waken the CAN network up, and the testing result of the testing result of described automobile back door low-frequency antenna and the described car room low-frequency antenna mode by the CAN signal is sent to described vehicle body control unit simultaneously;
Described vehicle body control unit detects automobile and whether satisfies the condition of setting up defences, if satisfy the condition of setting up defences, then described vehicle body control unit is controlled described automobile back door locking.This moment, automobile sent warning, and preferably, car body controller is carried out automobile back door locking order and also driven tailgate and four door motors, and loudspeaker pipe by locking for tailgate and four, and steering indicating light glimmers once.If do not satisfy the condition of setting up defences, then described vehicle body control unit is controlled the not locking of described automobile back door, and automobile back door and four can't be by lockings.Preferably, the described condition of setting up defences is: (1) automobile is in flameout state; (2) the whole closing of the doors of automobile; (3) the automobile front chamber door is closed; (4) automobile back door is closed.In the locking process of carrying out automobile back door, not only need to judge the position of Intelligent key, need also to judge whether automobile satisfies the condition of setting up defences, and has increased the antitheft dual safety performance of automobile locking.
Preferably, when automobile is in released state, press tailgate switch control button, this moment, vehicle body control unit judged that car load is in released state after receiving described automobile back door switch command, so the order that the tailgate switch is carried out is the car load locking.Described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal, after described Intelligent key control module receives the automobile back door switching signal, excite described automobile back door low-frequency antenna to detect described Intelligent key, this automobile back door low-frequency antenna produces a surveyed area at tail of the body, if detect Intelligent key (this zone is search coverage and car inner region outside the car of automobile back door low-frequency antenna) in automobile back door low-frequency antenna surveyed area, if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result, at this moment, the code of the Intelligent key that detects of Intelligent key control module storage automobile back door low-frequency antenna;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna detects described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result, at this moment, the code of the Intelligent key that detects of Intelligent key control module storage car room low-frequency antenna; Based Intelligent Control key control module compares the code of above-mentioned two Intelligent key, if two codes are identical, illustrates that the Intelligent key that car room low-frequency antenna and automobile back door low-frequency antenna detect is same key.The state of this moment illustrates that Intelligent key is in Automobile.If two codes are not identical, illustrate that the Intelligent key that car room low-frequency antenna and automobile back door low-frequency antenna detect is not same key.Certainly, stored the code with the Intelligent key of this car load coupling in the Intelligent key control module, the code whether code that can judge thus the Intelligent key that detects is complementary with car load.Because the surveyed area of automobile back door low-frequency antenna and car room low-frequency antenna has overlapping part, this lap is the car inner region, so need to carry out the affirmation of Intelligent key code, according to occuring simultaneously or be not to occur simultaneously, thereby judge the position of Intelligent key.This determination methods, the effective position of identification intelligent key not only, and can in time judge the Intelligent key of Fei Benche.
Described Intelligent key control module is waken the CAN network up, and the testing result of the testing result of described automobile back door low-frequency antenna and the described car room low-frequency antenna mode by the CAN signal is sent to described vehicle body control unit simultaneously; Then described vehicle body control unit is controlled the not locking of described automobile back door.Automobile back door and four can't be by lockings, and automobile back door and four can't be by lockings.
Preferably, when automobile is in blocking, press tailgate switch control button, this moment, vehicle body control unit judged that car load is in blocking after receiving described automobile back door switch command, so the order that the tailgate switch is carried out is the car load release.Described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal, after described Intelligent key control module receives described automobile back door switching signal, excite described car room low-frequency antenna to detect described Intelligent key, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described automobile back door low-frequency antenna again,
(1) if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result; The state of this moment illustrates that Intelligent key is outside car;
Described Intelligent key control module is waken the CAN network up, and the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna sent to described vehicle body control unit simultaneously by the CAN signal, then described vehicle body control unit is controlled described automobile back door release.This moment, automobile sent warning, and preferably, car body controller is carried out automobile back door locking order and also driven tailgate and four door motors, and loudspeaker pipe by locking for tailgate and four, and steering indicating light glimmers once.Because Intelligent key is outside car, description operation person also outside car, carries out unlock command and sends alarm release success, is conducive to the operator and judges, and can remove to pull automobile back door and carry out open operation.
(2) if described automobile back door low-frequency antenna does not detect described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna, and then described vehicle body control unit is controlled the not release of described automobile back door.The state of this moment is that Intelligent key is neither in car, also not outside car.Because this moment, the operator did not carry Intelligent key, perhaps the possible operation person is not the car owner, and this moment, there was stolen danger in the release meeting, so do not carry out release.
Preferably, when automobile is in blocking, press tailgate switch control button, this moment, vehicle body control unit judged that car load is in blocking after receiving described automobile back door switch command, so the order that the tailgate switch is carried out is the car load release.Described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal, after described Intelligent key control module receives described automobile back door switching signal, excite described car room low-frequency antenna to detect described Intelligent key, described car room low-frequency antenna detects described Intelligent key, and then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module does not send to described vehicle body control unit with described testing result, thereby controls the not release of described automobile back door.
Preferably, described automobile back door is that automobile layback tailgate or automobile are just drawing tailgate.
Be illustrated in figure 1 as automobile back door Intelligent key installation drawing, wherein, car body controller connects battery positive voltage, guarantees car load at the OFF shelves, and wherein, described OFF shelves are that automobile is in flameout state, and this moment, car body controller had power supply to provide.The automobile back door switch directly is connected on the Intelligent key control module, the car body controller input end can receive tailgate switching signal, ignition signal, CAN signal, lock status feedback signal, lock status signal etc., after car body controller receives above-mentioned signal, thereby thereby can control the switch that the opening and closing of back door of vehicle motor is controlled automobile back door, and car body controller can also be controlled the automotive four-door motor.Certainly, car body controller also can directly receive remote controller signal.Wherein, the tailgate switch can send and lock or the order of release sends to car body controller to order by middle control switch.Intelligent control module passes through wake-up signal wakes automobile back door low-frequency antenna or/and the car room low-frequency antenna, the automobile back door low-frequency antenna is or/and the car room low-frequency antenna sends sweep signal, and Intelligent key receives this sweep signal and sends a signal to the Intelligent key control module by radio frequency again.
As shown in Figure 2, car body controller connects power supply, ground connection, and car body controller and tailgate switch, Intelligent key control module, firing system (IGN), middle control switch, lock status signal and other cab signal are realized the CAN communication simultaneously.The car internal controller has mu balanced circuit, and the car internal controller receives after the various input messages and sets up transmission of information between the CPU by input message integrated circuit and car body controller, and the CPU of car body controller can control driving circuit, externally driver output.This automobile back door Intelligent key device also has diagnostic function, when the tailgate drive part circuit of vehicle breaks down, self diagnosis can appear in car body controller, and sending some diagnosis messages by the CAN bus, this message content comprises following signal: electric back door short circuit (Short GND), electric back door open circuit (Open Load), relay are burnt (Stuck ON) to death.Car body controller can be converted to corresponding DTC by the diagnosis message, and it is left among the EEPROM, and the connection diagnostic device is just direct read failure information later on.
Be understandable that, above embodiment only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement also are considered as protection scope of the present invention.
Claims (10)
1. the control method of an automobile back door Intelligent key device, wherein, automobile back door Intelligent key device comprises: vehicle body control unit, Intelligent key, Intelligent key control module, automobile back door low-frequency antenna and car room low-frequency antenna, wherein, described automobile back door low-frequency antenna detects outside the automobile trunk and the car room Intelligent key, described car room low-frequency antenna detects the car room Intelligent key, it is characterized in that, the control method of described automobile back door Intelligent key device comprises:
When automobile is in released state, described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal after receiving described automobile back door switch command, then described Intelligent key control module excites described automobile back door low-frequency antenna to detect described Intelligent key, then described automobile back door low-frequency antenna testing result that described Intelligent key is had or not feeds back to described Intelligent key control module, the testing result that described Intelligent key control module has or not according to Intelligent key judges whether described testing result is sent to described vehicle body control unit, thereby controls locking or the release of described automobile back door.
2. the control method of automobile back door Intelligent key device according to claim 1 is characterized in that,
If described automobile back door low-frequency antenna does not detect described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result, described Intelligent key control module does not send to described vehicle body control unit with described testing result, thereby controls the not locking of described automobile back door.
3. the control method of automobile back door Intelligent key device according to claim 1 is characterized in that,
If described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna;
Described vehicle body control unit detects automobile again and whether satisfies the condition of setting up defences, if satisfy the condition of setting up defences, then described vehicle body control unit is controlled described automobile back door locking.
4. the control method of automobile back door Intelligent key device according to claim 1 is characterized in that,
If described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna;
Described vehicle body control unit detects automobile again and whether satisfies the condition of setting up defences, if do not satisfy the condition of setting up defences, then described vehicle body control unit is controlled the not locking of described automobile back door.
5. according to claim 3 or the control method of 4 described automobile back door Intelligent key devices, it is characterized in that, the described condition of setting up defences is:
(1) automobile is in flameout state;
(2) the whole closing of the doors of automobile;
(3) the automobile front chamber door is closed;
(4) automobile back door is closed.
6. the control method of automobile back door Intelligent key device according to claim 1 is characterized in that,
If described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described car room low-frequency antenna again, if described car room low-frequency antenna detects described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna, and then described vehicle body control unit is controlled the not locking of described automobile back door.
7. the control method of automobile back door Intelligent key device according to claim 1 is characterized in that, also comprises:
When automobile is in blocking, described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal after receiving described automobile back door switch command, then described Intelligent key control module excites described car room low-frequency antenna to detect described Intelligent key, if described car room low-frequency antenna does not detect described Intelligent key, then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module excites described automobile back door low-frequency antenna again,
(1) if described automobile back door low-frequency antenna detects described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna, and then described vehicle body control unit is controlled described automobile back door release;
(2) if described automobile back door low-frequency antenna does not detect described Intelligent key, then described automobile back door low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module sends to described vehicle body control unit simultaneously with the testing result of described automobile back door low-frequency antenna and the testing result of described car room low-frequency antenna, and then described vehicle body control unit is controlled the not release of described automobile back door.
8. the control method of automobile back door Intelligent key device according to claim 1 is characterized in that, also comprises:
When automobile is in blocking, described vehicle body control unit sends to described Intelligent key control module with described automobile back door switching signal after receiving described automobile back door switch command, then described Intelligent key control module excites described car room low-frequency antenna to detect described Intelligent key, described car room low-frequency antenna detects described Intelligent key, and then described car room low-frequency antenna feeds back to described Intelligent key control module to described testing result;
Described Intelligent key control module does not send to described vehicle body control unit with described testing result, thereby controls the not release of described automobile back door.
9. the control method of any one or the described automobile back door Intelligent key of claim 6 ~ 8 any one device is characterized in that according to claim 1 ~ 4, and described automobile back door is that automobile layback tailgate or automobile are just drawing tailgate.
10. according to claim 3 or the control method of 7 described automobile back door Intelligent key devices, it is characterized in that, when described vehicle body control unit was controlled described tailgate and carried out the operation of locking or release, automobile sent warning.
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