CN112009422B - Antenna system of PEPS system, key searching method, PEPS system and vehicle - Google Patents
Antenna system of PEPS system, key searching method, PEPS system and vehicle Download PDFInfo
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- CN112009422B CN112009422B CN201910472785.5A CN201910472785A CN112009422B CN 112009422 B CN112009422 B CN 112009422B CN 201910472785 A CN201910472785 A CN 201910472785A CN 112009422 B CN112009422 B CN 112009422B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
Abstract
The invention relates to the technical field of vehicles, and provides an antenna system of a PEPS system, a key searching method, the PEPS system and a vehicle. The antenna system of the present invention includes: a first low frequency antenna provided at a middle position inside the vehicle; a second low frequency antenna and a third low frequency antenna respectively arranged at a driving side and a copilot side outside the vehicle; and a fourth low frequency antenna provided at a trunk position inside the vehicle; wherein the first low frequency antenna, the second low frequency antenna, the third low frequency antenna and the fourth low frequency antenna are configured to generate a field strength carrier wave for searching for a key; wherein the relative positions of the first, second, third and fourth low frequency antennas are configured to enable the antenna system to generate a field strength carrier that covers the entire vehicle interior; wherein the fourth low frequency antenna is configured to be capable of generating a field strength carrier covering an area outside a trunk of the vehicle. The invention reduces the number of the antennas and improves the user experience.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an antenna system of a Passive Entry Passive Start (PEPS) system, a key searching method, the PEPS system and a vehicle.
Background
With the continuous improvement of the requirement of consumers on the comfort of vehicles, the PEPS system has gradually become the standard configuration of each vehicle type, and on the premise of meeting the basic functions of the PEPS system, how to improve the user experience and reduce the cost of the PEPS system has gradually become the problem of increasing attention of relevant manufacturers.
Fig. 1 is a schematic diagram of antenna layout in a PEPS system of an existing vehicle model. As shown in fig. 1, the existing mass-produced vehicle model adopts a scheme of arranging 6 low-frequency antennas inside and outside, and includes No. 1 antenna, No. 2 antenna and No. 3 antenna which are arranged inside the vehicle and distributed in front, middle and back, and also includes No. 4 antenna, No. 5 antenna and No. 6 antenna which are respectively arranged at the driving side, the copilot side and the trunk outside the vehicle. When the functions of the PEPS system, such as keyless start, keyless entry/exit of left/right front doors, trunk opening/closing and the like, are started, the 6 low-frequency antennas are required to search for the existence of keys so as to ensure the safe realization of the corresponding functions.
However, the key searching process using 6 low-frequency antennas is complex, the searching time is long, the user experience is not improved, and the 6 antennas do not meet the expectation of reducing the cost of the PEPS system.
Disclosure of Invention
In view of this, the invention aims to provide an antenna system of a PEPS system, so as to solve the problems that the cost of a scheme for arranging 6 low-frequency antennas inside and outside an existing vehicle type is high, and the user experience is relatively poor.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an antenna system of a PEPS system, the antenna system comprising: a first low frequency antenna provided at a middle position inside the vehicle; a second low frequency antenna and a third low frequency antenna respectively arranged at a driving side and a copilot side outside the vehicle; and a fourth low frequency antenna provided at a trunk position inside the vehicle; wherein the first, second, third and fourth low frequency antennas are configured to generate a field strength carrier for searching for a key; wherein the relative positions of the first, second, third and fourth low frequency antennas are configured to enable the antenna system to generate a field strength carrier that covers the entire vehicle interior; wherein the fourth low frequency antenna is configured to be capable of generating a field strength carrier covering an area outside a trunk of a vehicle.
Compared with the prior art, the antenna system has the following advantages: compare in the PEPS system of current motorcycle type, simplify 6 low frequency antennas for 4 low frequency antennas, reduced the quantity of antenna, reduced corresponding antenna search key again, and reduced the cost of PEPS system and promoted user experience in view of the above.
The invention also aims to provide a key searching method of the PEPS system, so as to solve the problems of higher cost and relatively poorer user experience of the existing scheme for searching keys by adopting 6 low-frequency antennas.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a key searching method of a PEPS system adopts the antenna system, and the key searching method comprises the following steps: after the keyless start function of the PEPS system is awakened, controlling one of the first low-frequency antenna, the second low-frequency antenna or the third low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search for keys; after the left/right front door of the PEPS system is awakened without a key entering/leaving function, controlling the second low-frequency antenna or the third low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search keys; after the boot-up function of the PEPS system is awakened, controlling the fourth low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search for keys; and/or after the closing function of the trunk of the PEPS system is awakened, controlling the first low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search for keys.
Further, after the keyless start function of the PEPS system is awakened, the controlling one of the first low-frequency antenna, the second low-frequency antenna, or the third low-frequency antenna to initiate function authentication and send a field intensity carrier includes: controlling the first low-frequency antenna to initiate function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the first low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna so as to search keys, if the keys are not searched, controlling one of the second low-frequency antenna and the third low-frequency antenna to initiate the function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the one of the second low-frequency antenna and the third low-frequency antenna, the other one of the second low-frequency antenna and the third low-frequency antenna, the first low-frequency antenna and the fourth low-frequency antenna so as to search keys; wherein the second low frequency antenna and the third low frequency antenna can be switched in order; wherein the fourth low frequency antenna can be omitted for keyless start functionality.
Further, when the first low-frequency antenna is controlled to initiate function authentication and field intensity carriers are respectively generated according to the sequence of the first low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna to search for a key, if the second low-frequency antenna and/or the third low-frequency antenna fails, key search is performed only according to the field intensity carriers generated by the first low-frequency antenna.
Further, after the left/right front door keyless entry/exit function of the PEPS system is awakened, the controlling the second low-frequency antenna or the third low-frequency antenna to initiate function authentication and controlling the sequence of transmitting field intensity carriers by the low-frequency antennas to search for a key includes: controlling one of the second and third low-frequency antennas to initiate a functional authentication, and controlling field strength carriers to be generated in order of the one of the second and third low-frequency antennas, the other of the second and third low-frequency antennas, the first and fourth low-frequency antennas, respectively, to search for a key, and if a key is not searched, controlling the other of the second and third low-frequency antennas to initiate the functional authentication, and controlling field strength carriers to be generated in order of the other of the second and third low-frequency antennas, the one of the second and third low-frequency antennas, the first and fourth low-frequency antennas, respectively, to search for a key; wherein the fourth low frequency antenna can be omitted for keyless start functionality.
Further, after the boot opening function of the PEPS system is awakened, the controlling the fourth low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carriers transmitted by the low-frequency antennas to search for a key includes: controlling the fourth low-frequency antenna to initiate function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the fourth low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the first low-frequency antenna so as to search keys; when the second low-frequency antenna, the third low-frequency antenna or the first low-frequency antenna fails, the fourth low-frequency antenna still initiates function authentication and generates a field intensity carrier wave to search for a key; wherein the second low frequency antenna and the third low frequency antenna can be switched in order.
Further, after the trunk shutdown function of the PEPS system is awakened, the controlling the first low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carriers transmitted by the low-frequency antennas to search for a key includes: controlling the first low-frequency antenna to initiate function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the first low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna so as to search keys; when the second low-frequency antenna, the third low-frequency antenna or the fourth low-frequency antenna fails, the first low-frequency antenna still initiates function authentication and generates a field intensity carrier wave to search for a key; wherein the second low frequency antenna and the third low frequency antenna can be switched in order.
Compared with the prior art, the key searching method of the PEPS system has the following advantages:
(1) the key searching method of the embodiment of the invention adopts a 4-antenna searching scheme, thereby saving the number of antennas.
(2) The left and right side antennas are damaged one without affecting the keyless entry/exit function of the other side.
(3) When the low-frequency antenna in the vehicle has a fault, the key can be positioned through the left and right low-frequency antennas, and the vehicle can still be started.
(4) When the left side or the right side low frequency antenna is in fault, the key can be positioned through the low frequency antenna in the vehicle, and the vehicle can still be started.
Another objective of the present invention is to provide a machine-readable storage medium to solve the problems of high cost and relatively poor user experience of the existing key searching scheme using 6 low-frequency antennas.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a machine-readable storage medium having instructions stored thereon for causing a machine to perform the key search method described above.
The machine-readable storage medium has the same advantages as the key searching method described above over the prior art, and is not described herein again.
The invention also aims to provide a PEPS system to solve the problems that the scheme of arranging 6 low-frequency antennas inside and outside the existing vehicle model is high in cost and poor in user experience.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a PEPS system comprises the antenna system.
The advantages of the PEPS system and the antenna system are the same as those of the antenna system in the prior art, and are not described herein again.
The invention further aims to provide a vehicle to solve the problems that the scheme of arranging 6 low-frequency antennas inside and outside the vehicle is high in cost and relatively poor in user experience in the existing vehicle type.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle comprising the PEPS system of claim.
The vehicle and the antenna system have the same advantages compared with the prior art, and are not described in detail herein.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
Fig. 1 is a schematic diagram of antenna layout in a PEPS system of an existing vehicle model;
fig. 2 is a schematic structural diagram of an antenna system of the PEPS system according to an embodiment of the present invention; .
FIG. 3 is a schematic diagram of an antenna search sequence for a keyless start function of the PEPS system according to the embodiment of the invention;
FIG. 4 is a schematic diagram of a new antenna search in the case where no key is searched using the sequence of FIG. 3 in an embodiment of the present invention;
FIG. 5 is a schematic diagram of an antenna search sequence for the keyless entry/exit function of the left/right front door of the PEPS system in an embodiment of the present invention; and
fig. 6 is a schematic diagram of an antenna search sequence for the trunk open function of the PEPS system according to an embodiment of the present invention.
Description of the reference numerals:
110. a first low frequency antenna; 120. a second low frequency antenna; 130. a third low frequency antenna; 140. a fourth low frequency antenna.
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 2 is a schematic structural diagram of an antenna system of the PEPS system according to the embodiment of the present invention. As shown in fig. 2, the antenna system includes: a first low-frequency antenna 110 provided at an intermediate position inside the vehicle; a second low frequency antenna 120 and a third low frequency antenna 130 provided on the driver side and the passenger side outside the vehicle, respectively; and a fourth low frequency antenna 140 provided at a trunk position inside the vehicle.
Wherein the first low frequency antenna 110, the second low frequency antenna 120, the third low frequency antenna 130 and the fourth low frequency antenna 140 are configured to generate a field strength carrier for searching for a key; the relative positions of the first low frequency antenna 110, the second low frequency antenna 120, the third low frequency antenna 130 and the fourth low frequency antenna 140 are configured to enable the antenna system to generate a field strength carrier that can cover the entire vehicle interior; the fourth low frequency antenna 140 is configured to generate a field strength carrier covering an area outside the trunk of the vehicle.
Accordingly, it can be understood that, by arranging 4 antennas in fig. 2, they together implement field intensity carrier coverage of antennas 1, 2 and 3 arranged in the vehicle interior in fig. 1 to the search area in the vehicle interior, and the second antenna 120 and the third antenna 130 of the embodiment of the present invention also simultaneously take into account the functions of antennas 4 and 5 arranged in the driving side and the secondary side respectively outside the vehicle in fig. 1, while the fourth antenna 140 can implement field intensity carrier coverage of antennas 3 and 6 in fig. 1 to the relevant area of the trunk. In addition, it should be noted that the antenna types of the 4 low-frequency antennas of the embodiment of the present invention and the 6 low-frequency antennas of the existing vehicle model may be identical, that is, there is no increase in the cost of each antenna itself.
Therefore, compared with the existing vehicle type PEPS system, the antenna system of the PEPS system of the embodiment of the invention simplifies 6 low-frequency antennas into 4 low-frequency antennas, reduces the number of the antennas, reduces corresponding antenna search keys, accordingly reduces the cost of the PEPS system and improves the user experience.
Further, based on the antenna system of the embodiment of the present invention, another embodiment of the present invention further provides a key search method of the PEPS system. Before introducing the key searching method, the conventional key searching method using 6 low-frequency antennas described in fig. 1 is described in order to understand specific implementation details and advantages of the key searching method according to the embodiment of the present invention.
The key search in the PEPS system mainly involves functions such as keyless start, left/right front door keyless entry/exit, trunk open/close, and the like. The following describes, with reference to fig. 1, a sequence and a strategy of searching for a key by using antennas involved in the conventional scheme of adopting 6 low-frequency antennas arranged inside and outside to realize functions such as keyless start, keyless entry/exit of left/right front doors, trunk opening/closing, and the like.
1) Low frequency antenna search sequence and strategy when starting without key.
Under the application scene of the function, a driver enters the vehicle, so related antennas are No. 1-3 antennas distributed in the vehicle. The corresponding antenna search order is: the No. 2 antenna sends authentication data and simultaneously sends a field intensity carrier → the No. 1 antenna sends the field intensity carrier → the No. 3 antenna sends the field intensity carrier. The corresponding protection strategy is: this function is disabled if any one of the low frequency antennas or its driving circuit fails.
2) And (4) searching sequence and strategy of the low-frequency antenna when the left/right front door enters without a key.
In the application scene of the function, a driver or a passenger is at the left/right front door and tries to enter the vehicle, a key can be outside the vehicle (on the body of the driver who does not enter) or inside the vehicle, and therefore related antennas are antennas No. 1-3 arranged inside the vehicle and antennas No. 4-5 related to the left/right front door. The corresponding antenna search order is: 4/5 antenna sends authentication data and sends field intensity carrier → 5/4 antenna sends field intensity carrier → 2 antenna sends field intensity carrier → 1 antenna sends field intensity carrier → 3 antenna sends field intensity carrier. The corresponding protection strategy is: this function is disabled if any one of the low frequency antennas or its driving circuit fails.
3) And (4) searching sequence and strategy of low-frequency antennas when the left/right front doors leave without keys.
Under the application scene of the function, a driver or a passenger tries to get off the vehicle from the left/right front door, the key is required to be in the vehicle, but after the key search is successful, the left/right front door antenna is required to be authenticated to open the door, so related antennas are still the No. 1-3 antenna arranged in the vehicle and the No. 4-5 antenna related to the left/right front door. The corresponding antenna search order is: the antenna No. 2 sends the authentication data and simultaneously sends the field intensity carrier → the antenna No. 1 sends the field intensity carrier → the antenna No. 3 sends the field intensity carrier → 4/5 sends the authentication data and simultaneously sends the field intensity carrier → the antenna No. 5/4 sends the field intensity carrier → the antenna No. 2 sends the field intensity carrier → the antenna No. 1 sends the field intensity carrier → the antenna No. 3 sends the field intensity carrier. The corresponding protection strategy is: this function is disabled if any one of the low frequency antennas or its driving circuit fails.
4) And (4) searching sequence and strategy of the low-frequency antenna when the trunk is opened.
Under the application scene of the function, a driver generally controls the state of a trunk in a vehicle and needs to get off to open the trunk, so related antennas are No. 1-3 antennas arranged in the vehicle and No. 6 antennas at the trunk. The corresponding antenna search order is: no. 6 antenna sends authentication data and simultaneously sends a field intensity carrier → No. 2 antenna sends the field intensity carrier → No. 1 antenna sends the field intensity carrier → No. 3 antenna sends the field intensity carrier. The corresponding protection strategy is: this function is disabled if any one of the low frequency antennas or its driving circuit fails.
5) Low frequency antenna search sequence and strategy when the trunk is closed.
Under the application scene of the function, a driver can directly lock the trunk in the vehicle, so the related antenna is a No. 1-3 antenna distributed in the vehicle. The corresponding antenna search order is: the No. 2 antenna sends authentication data and simultaneously sends a field intensity carrier → the No. 1 antenna sends the field intensity carrier → the No. 3 antenna sends the field intensity carrier. The corresponding protection strategy is: if any one of the low frequency antennas or its driving circuit fails, the PEPS is in a key-off protection state.
Note that, for convenience of description, a failure such as a low-frequency antenna or a driving circuit thereof will be hereinafter collectively referred to as a failure of the low-frequency antenna.
It can be known that, in the existing scheme of adopting 6 low-frequency antennas to be arranged inside and outside, in order to realize the functions of keyless starting, keyless entering/leaving of left/right front doors, trunk opening/closing and the like, the related low-frequency antennas must work normally, and when any one low-frequency antenna fails, the related functions are disabled, so that the risk of abnormal vehicle functions is increased. Accordingly, the key searching method of the PEPS system according to another embodiment of the present invention can solve the problem in the case of only using 4 low-frequency antennas.
Referring to fig. 2, the key search method according to the embodiment of the present invention includes only any one or more of the following elements.
1) A keyless start function for the PEPS system.
In the embodiment of the present invention, after the keyless start function of the PEPS system is awakened, one of the first low frequency antenna 110, the second low frequency antenna 120, or the third low frequency antenna 130 is controlled to initiate function authentication, and the sequence of transmitting field intensity carriers by the low frequency antennas is controlled to search for a key. The function authentication is realized by sending authentication data, only the antenna which performs the function authentication sends the authentication data, and other antennas only generate carrier waves and do not send data.
That is, the first low frequency antenna 110, the second low frequency antenna 120, or the third low frequency antenna 130 may all initiate authentication for the keyless start function, rather than only the number 2 antenna being able to initiate functional authentication as with the corresponding 6 low frequency antennas of fig. 1.
Fig. 3 is a schematic diagram of an antenna search sequence for the keyless start function of the PEPS system in the embodiment of the present invention. As shown in fig. 3, in a preferred embodiment, controlling one of the first low frequency antenna 110, the second low frequency antenna 120, or the third low frequency antenna 130 to initiate function authentication and controlling the sequence of transmitting field strength carriers by the low frequency antennas to search for a key may specifically include:
The first low-frequency antenna 110 is controlled to initiate function authentication, and field intensity carriers are controlled to be generated respectively according to the sequence of the first low-frequency antenna 110, the second low-frequency antenna 120, the third low-frequency antenna 130 and the fourth low-frequency antenna 140 so as to search for keys.
It is possible that the first low frequency antenna 110 may fail such that a key is not searched. In response to this, the present inventors have conducted extensive studies on,
fig. 4 is a diagram illustrating a new antenna search in the case where no key is searched in the sequence of fig. 3 according to an embodiment of the present invention. Referring to fig. 4, the new antenna search order is: controlling one of the second low frequency antenna 120 and the third low frequency antenna 130 (e.g., the second low frequency antenna 120) to initiate the functional authentication, and controlling the field strength carriers to be each generated in the order of the one of the second low frequency antenna 120 and the third low frequency antenna 130, the other of the second low frequency antenna 120 and the third low frequency antenna 130 (e.g., the third low frequency antenna 130), the first low frequency antenna 110, and the fourth low frequency antenna 140 to search for a key.
That is, if the first low-frequency antenna 110 fails to search for a key as expected due to a failure or the like, the function authentication is performed again using the second low-frequency antenna 120 or the third low-frequency antenna 130, and a new antenna search procedure is started. In this way, the second low frequency antenna 120 or the third low frequency antenna 130 may be used to initiate function authentication and execute the corresponding antenna search sequence, but if the second low frequency antenna 120 and/or the third low frequency antenna 130 fails, the key search is performed only according to the field strength carrier generated by the first low frequency antenna 110.
Although the fourth low-frequency antenna 140 is involved in the antenna search sequence of fig. 3 and 4, the field intensity carrier wave for the trunk is mainly generated, and the field intensity carrier wave for the trunk may not be used in the keyless start function, so that the fourth low-frequency antenna 140 may be omitted in the above antenna search sequence.
Therefore, it can be seen that the key searching method according to the embodiment of the present invention can ensure that when there is no key start request and only the first low frequency antenna 110 has a fault, if the second low frequency antenna 120 or the third low frequency antenna 130 can determine that the key is in the vehicle, the start function can still be achieved; when only the second low frequency antenna 120 or the third low frequency antenna 130 malfunctions, if it is determined through the first low frequency antenna 110 that the key is in the car, the start function can still be implemented.
2) Keyless entry/exit functionality for the left/right front door of the PEPS system.
In the embodiment of the present invention, after the left/right front door of the PEPS system is awakened without a key entry/exit function, the second low frequency antenna 120 or the third low frequency antenna 130 is controlled to initiate function authentication and the sequence of the field intensity carriers transmitted by the low frequency antennas is controlled to search for a key.
Fig. 5 is a schematic diagram of an antenna search sequence for the left/right front door keyless entry/exit function of the PEPS system in an embodiment of the present invention. As shown in fig. 5, in a preferred embodiment, the controlling the second low frequency antenna 120 or the third low frequency antenna 130 to initiate function authentication and the controlling the sequence of transmitting the field strength carrier wave by each low frequency antenna to search for the key includes:
controls one of the second low frequency antenna 120 and the third low frequency antenna 130 (e.g. the second low frequency antenna 120) to initiate functional authentication, and controls the respective generation of field strength carriers in the order of the one of the second low frequency antenna 120 and the third low frequency antenna 130, the other one of the second low frequency antenna 120 and the third low frequency antenna 130 (e.g., the third low frequency antenna 130), the first low frequency antenna 110 and the fourth low frequency antenna 140 to search for a key, and if a key is not searched, the other of the second low frequency antenna 120 and the third low frequency antenna 130 is controlled to initiate the functional authentication, and controls the generation of field strength carriers in the order of the other one of the second and third low frequency antennas 120 and 130, the first and fourth low frequency antennas 110 and 140, respectively, to search for a key.
For example, if only the second low frequency antenna 120 fails, the left front door cannot wake up the key for keyless entry/exit and does not perform the operation, and the right front door does not have the key for keyless entry/exit, the third low frequency antenna 130 can authenticate the corresponding function and perform the key search, and if it detects that the key is in the vehicle, the right front door can be opened separately. If only the third low-frequency antenna 130 fails and the right front door cannot be awakened when the right front door enters/leaves without a key, no action is performed, and the left front door enters/leaves without a key, the second low-frequency antenna 120 can authenticate the corresponding function and search for the key, the antenna behind the antenna No. 3 cannot send out field intensity carrier waves, and if the left front door is detected to be in the car, the left front door can be opened independently.
Therefore, the keyless entry/exit function of the other side is not affected by the failure of one of the left and right side antennas.
In addition, although the fourth low-frequency antenna 140 is involved in the antenna search sequences of fig. 3 and 4, the field intensity carrier for the trunk is mainly generated, and the field intensity carrier for the trunk may not be used in the keyless entry/exit function, so the fourth low-frequency antenna 140 may be omitted in the above antenna search sequence.
3) A trunk open function for the PEPS system.
In the embodiment of the present invention, after the boot opening function of the PEPS system is awakened, the fourth low frequency antenna 140 is controlled to initiate function authentication and the sequence of the field intensity carriers transmitted by the low frequency antennas is controlled to search for a key.
Fig. 6 is a schematic diagram of an antenna search sequence for the trunk open function of the PEPS system according to an embodiment of the present invention. As shown in fig. 6, in a preferred embodiment, controlling the fourth low frequency antenna 140 to initiate function authentication and controlling the sequence of transmitting field strength carriers by the low frequency antennas to search for a key includes:
and controlling the fourth low frequency antenna 140 to initiate function authentication, and controlling the field strength carriers to be generated respectively according to the sequence of the fourth low frequency antenna 140, the second low frequency antenna 120, the third low frequency antenna 130 and the first low frequency antenna 110 so as to search for the key. Wherein, when the second low frequency antenna 120, the third low frequency antenna 130 or the first low frequency antenna 110 fails, the fourth low frequency antenna still initiates functional authentication and generates a field strength carrier to search for a key
For example, if the second low frequency antenna 120, the third low frequency antenna 130 or the first low frequency antenna 110 fails, a valid smart key can be found in an area outside the trunk through the fourth low frequency antenna 140 and other low frequency antennas that have not failed, the trunk opening function can still be performed.
4) A trunk close function for the PEPS system.
In the embodiment of the invention, after the trunk closing function of the PEPS system is awakened, the first low-frequency antenna 110 is controlled to initiate function authentication and the sequence of field intensity carrier waves sent by the low-frequency antennas is controlled to search for keys.
Referring to fig. 3, the antenna search sequence for the trunk opening function of the PEPS system correspondingly controls the first low frequency antenna 110 to initiate function authentication and controls the sequence of transmitting field strength carriers by the low frequency antennas to search for a key includes:
the first low frequency antenna 110 is controlled to initiate function authentication, and field strength carriers are respectively generated in the order of the first low frequency antenna 110, the second low frequency antenna 120, the third low frequency antenna 130 and the fourth low frequency antenna 140 to search for a key. Wherein, when the second low frequency antenna 120, the third low frequency antenna 130 or the fourth low frequency antenna 140 fails, the first low frequency antenna 110 still initiates function authentication and generates a field strength carrier to search for a key.
For example, if the first low frequency antenna 110 is a legal smart key in the vehicle, the trunk closing function may be performed regardless of whether other antennas are faulty.
In summary, the key searching method of the embodiment of the present invention adopts a 4-antenna searching scheme, which saves the number of antennas and has at least the following advantages: the antenna on the left side and the antenna on the right side are damaged, and the keyless entry/exit function of the other side is not influenced; when the low-frequency antenna in the vehicle has a fault, the key can be positioned through the left and right low-frequency antennas, and the vehicle can still be started; when the left side or the right side low frequency antenna is in fault, the key can be positioned through the low frequency antenna in the vehicle, and the vehicle can still be started.
Another embodiment of the present invention also provides a machine-readable storage medium having instructions stored thereon for causing a machine to execute the key searching method of the above-described embodiment.
Such as a vehicle controller or a processor configured in the PEPS system. The antenna control involved in the key search method can be determined by instructions, such as a processor performing a key search in the order of antennas in a preset table.
Additionally, the machine-readable storage medium includes, but is not limited to, Phase Change Random Access Memory (PRAM, also known as RCM/PCRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory (Flash Memory) or other Memory technology, compact disc read only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, and the like, which can store program codes.
Another embodiment of the present invention further provides a PEPS system, which includes the antenna system employing 4 antennas described in the above embodiments. Another embodiment of the invention also provides a vehicle comprising the PEPS system. The detailed implementation details and effects of the PEPS system and the vehicle can refer to the related embodiments, which are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A key searching method of a PEPS system is characterized in that the PEPS system adopts an antenna system, and the antenna system comprises:
a first low frequency antenna provided at a middle position inside the vehicle;
a second low frequency antenna and a third low frequency antenna respectively arranged at a driving side and a copilot side outside the vehicle; and
a fourth low-frequency antenna provided at a trunk position inside the vehicle;
wherein the first, second, third and fourth low frequency antennas are configured to generate a field strength carrier for searching for a key;
Wherein the relative positions of the first, second, third and fourth low frequency antennas are configured to enable the antenna system to generate a field strength carrier that covers the entire vehicle interior;
wherein the fourth low frequency antenna is configured to be capable of generating a field strength carrier covering an outer region of a trunk of a vehicle;
and the key searching method includes:
after the keyless start function of the PEPS system is awakened, controlling one of the first low-frequency antenna, the second low-frequency antenna or the third low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search for keys;
after the left/right front door of the PEPS system is awakened without a key entering/leaving function, controlling the second low-frequency antenna or the third low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search keys;
after the boot-up function of the PEPS system is awakened, controlling the fourth low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search for keys; and/or
After the closing function of the trunk of the PEPS system is awakened, controlling the first low-frequency antenna to initiate function authentication and controlling the sequence of field intensity carrier waves transmitted by the low-frequency antennas to search for keys;
After the keyless start function of the PEPS system is awakened, the controlling one of the first low-frequency antenna, the second low-frequency antenna, or the third low-frequency antenna to initiate function authentication and send a field strength carrier wave includes:
controlling the first low-frequency antenna to initiate function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the first low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna so as to search keys, if the keys are not searched, controlling one of the second low-frequency antenna and the third low-frequency antenna to initiate the function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the one of the second low-frequency antenna and the third low-frequency antenna, the other one of the second low-frequency antenna and the third low-frequency antenna, the first low-frequency antenna and the fourth low-frequency antenna so as to search keys;
wherein the second low frequency antenna and the third low frequency antenna can be switched in order;
wherein the fourth low frequency antenna can be omitted for keyless start functionality;
and when the first low-frequency antenna is controlled to initiate function authentication and field intensity carriers are respectively generated according to the sequence of the first low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna to search keys, if the second low-frequency antenna and/or the third low-frequency antenna fails, key search is carried out only according to the field intensity carriers generated by the first low-frequency antenna.
2. The key searching method of claim 1, wherein after the left/right front door keyless entry/exit function of the PEPS system wakes up, the controlling the second or third low frequency antenna to initiate function authentication and controlling the order in which the respective low frequency antennas transmit the field strength carriers to search for a key comprises:
controlling one of the second and third low frequency antennas to initiate a functional authentication, and controlling field strength carriers to be generated in an order of the one of the second and third low frequency antennas, the other one of the second and third low frequency antennas, the first and fourth low frequency antennas, respectively, to search for a key, and if a key is not searched, controlling the other one of the second and third low frequency antennas to initiate the functional authentication, and controlling field strength carriers to be generated in an order of the other one of the second and third low frequency antennas, the first and fourth low frequency antennas, respectively, to search for a key;
wherein the fourth low frequency antenna can be omitted for keyless start functionality.
3. The key searching method of claim 1, wherein after the boot opening function of the PEPS system is awakened, the controlling the fourth low-frequency antenna to initiate function authentication and controlling the sequence of transmitting field intensity carriers by the low-frequency antennas to search for a key comprises:
controlling the fourth low-frequency antenna to initiate function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the fourth low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the first low-frequency antenna so as to search keys;
when the second low-frequency antenna, the third low-frequency antenna or the first low-frequency antenna fails, the fourth low-frequency antenna still initiates function authentication and generates a field intensity carrier wave to search for a key;
wherein the second low frequency antenna and the third low frequency antenna can be switched in order.
4. The key searching method of claim 1, wherein after the trunk shutdown function of the PEPS system is awakened, the controlling the first low-frequency antenna to initiate function authentication and controlling the sequence of transmitting field intensity carriers by the low-frequency antennas to search for a key comprises:
controlling the first low-frequency antenna to initiate function authentication, and controlling field intensity carriers to be generated respectively according to the sequence of the first low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna so as to search keys;
When the second low-frequency antenna, the third low-frequency antenna or the fourth low-frequency antenna fails, the first low-frequency antenna still initiates function authentication and generates a field intensity carrier wave to search for a key;
wherein the second low frequency antenna and the third low frequency antenna can be switched in order.
5. A machine-readable storage medium having stored thereon instructions for causing a machine to perform the key searching method of any one of claims 1 to 4.
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| CN112829714A (en) * | 2021-03-08 | 2021-05-25 | 苏州摩贝斯电子科技有限公司 | Relay attack defense method, PEPS system and vehicle |
| CN115179896A (en) * | 2021-04-01 | 2022-10-14 | 长城汽车股份有限公司 | Vehicle key positioning method and vehicle |
| CN115384447A (en) * | 2021-05-24 | 2022-11-25 | 长城汽车股份有限公司 | Vehicle key searching method and device, computer readable storage medium and vehicle |
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