CN110545115A - Method for reducing same frequency interference of vehicle and vehicle-mounted keyless starting equipment - Google Patents
Method for reducing same frequency interference of vehicle and vehicle-mounted keyless starting equipment Download PDFInfo
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- CN110545115A CN110545115A CN201910783330.5A CN201910783330A CN110545115A CN 110545115 A CN110545115 A CN 110545115A CN 201910783330 A CN201910783330 A CN 201910783330A CN 110545115 A CN110545115 A CN 110545115A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims description 25
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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Abstract
The embodiment of the invention provides a method for reducing the co-channel interference of a vehicle and vehicle-mounted keyless starting equipment, wherein the method comprises the following steps: the controller generates a preset synchronous head as a synchronous head in a radio frequency communication protocol according to the preset identification information; the controller utilizes a preset synchronous head to set a radio frequency receiving device; the controller sends a first radio frequency signal to the matching key, and writes a preset synchronization head into the matching key, so that the matching key adopts the preset synchronization head to send key information when executing a matching process; the radio frequency receiving device judges whether the synchronization head of the received key information is consistent with a preset synchronization head; if the key information is consistent with the key information, the radio frequency receiving device transmits the key information to the controller and executes a matching process, otherwise, the radio frequency receiving device gives up transmitting the key information to the controller. The technical scheme of the embodiment of the invention can reduce the same frequency interference in the matching process of the automobile end and the key end of the PEPS system and reduce the influence of the same frequency interference on the normal matching and the normal off-line of the automobile.
Description
Technical Field
the embodiment of the invention relates to the technical field of vehicle communication, in particular to a method for reducing the same frequency interference of a vehicle and vehicle-mounted keyless starting equipment.
Background
A keyless entry and Start system, which is called PEPS (Passive entry Passive Start) system for short, is an automobile electronic technology developed in recent years. On the one hand, the vehicle with the PEPS system is installed, and the vehicle owner can complete functions of unlocking, locking, starting the vehicle and the like without taking out a key from the vehicle owner, so that great convenience and comfortableness are brought to the vehicle owner. On the other hand, with the continuous development of the technology, the cost of the PEPS system is effectively controlled. The PEPS system is more and more equipped on the automobile due to the two reasons.
with the improvement of the equipment rate of the PEPS system on the automobile, in order to improve the frequency utilization rate, the frequency reuse technology is applied to the PEPS system, and generally, the frequencies and protocols adopted by the same automobile type or the same supplier are the same. For example, on the production line of the whole car factory, in the processes of vehicle matching, vehicle offline detection and the like, a large amount of radio frequency interference exists in the space due to the adoption of the frequency reuse technology. Particularly, in the process of matching the automobile end and the key end of the PEPS system, because the key with the same frequency and protocol exists, the automobile end often receives radio frequency signals of other keys except the key to be matched, so that the occurrence of same frequency interference is caused, and the normal matching and the normal offline of the vehicle are influenced.
Disclosure of Invention
The embodiment of the invention provides a method for reducing the co-frequency interference of a vehicle and vehicle-mounted keyless starting equipment, which are used for reducing the co-frequency interference in the matching process of a vehicle end and a key end of a PEPS system and reducing the influence of the co-frequency interference on the normal matching and the normal off-line of the vehicle.
The embodiment of the invention provides a method for reducing the co-frequency interference of a vehicle, which is applied to vehicle-mounted keyless starting equipment, wherein the vehicle-mounted keyless starting equipment comprises the following steps: controller and radio frequency receiving arrangement includes:
The controller generates a preset synchronous head according to the preset identification information to serve as a synchronous head in a radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller;
The controller utilizes the preset synchronous head to set the radio frequency receiving device;
the controller sends a first radio frequency signal to a matching key, and writes the preset synchronization head into the matching key, so that the matching key adopts the preset synchronization head to send key information when executing a matching process;
The radio frequency receiving device judges whether a synchronization head of the received key information is consistent with the preset synchronization head;
if the synchronous head of the key information received by the radio frequency receiving device is consistent with the preset synchronous head, the radio frequency receiving device transmits the key information to the controller and executes a matching process, otherwise, the radio frequency receiving device gives up transmitting the key information to the controller.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the method further includes:
When the matching key is normally used after matching is completed, the radio frequency receiving device and the matching key continue to use the preset synchronization head for communication;
When the transmission parameter of the radio frequency signal transmitted to the radio frequency receiving device is consistent with the preset transmission parameter in the radio frequency receiving device, the radio frequency receiving device determines that the transmitted radio frequency signal is a second radio frequency signal and receives the second radio frequency signal;
The radio frequency receiving device judges whether a synchronization head of the received second radio frequency signal is consistent with the preset synchronization head;
and if the synchronous head of the second radio-frequency signal received by the radio-frequency receiving device is consistent with the preset synchronous head, the radio-frequency receiving device transmits the second radio-frequency signal to the controller, otherwise, the radio-frequency receiving device gives up transmitting the second radio-frequency signal to the controller.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the method further includes: when the radio frequency receiving device transmits a second radio frequency signal to the controller, if the second radio frequency signal obtained by the controller reaches a preset length, the data receiving is determined to be finished, and an interrupt is generated.
optionally, in a specific implementation manner provided in the embodiment of the present invention, the preset identification information includes: and the SN code of the controller and the information of the whole vehicle.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the radio frequency communication protocol includes: sync head, data field, and checksum.
an embodiment of the present invention further provides a vehicle-mounted keyless starting device, including: a controller and a radio frequency receiving device; the controller includes: the radio frequency receiving device comprises a synchronous head generating unit, a setting unit and a writing unit, and comprises: the device comprises a receiving unit, a judging unit and a first transmitting unit;
the synchronization head generating unit is used for generating a preset synchronization head according to the preset identification information to serve as the synchronization head in the radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller;
The setting unit is used for setting the radio frequency receiving device by utilizing the preset synchronous head;
the writing unit is used for sending a first radio frequency signal to a matching key and writing the preset synchronization head into the matching key so as to enable the matching key to adopt the preset synchronization head to send key information when executing a matching process;
The receiving unit is used for receiving key information;
The first judging unit is used for judging whether the synchronization head of the key information received by the receiving unit is consistent with the preset synchronization head;
The first transmission unit is used for transmitting the key information to the controller and executing the matching process if the synchronization head of the key information received by the receiving unit is consistent with the preset synchronization head, otherwise, giving up transmitting the key information to the controller.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the radio frequency receiving apparatus further includes: a second judging unit and a second transferring unit,
When the matching key is normally used after matching is completed, the receiving unit is further used for continuing to use the preset synchronization head for communication with the matching key; when the transmission parameter of the radio frequency signal transmitted to the receiving unit is consistent with the preset transmission parameter in the radio frequency receiving device, determining that the transmitted radio frequency signal is a second radio frequency signal and receiving the second radio frequency signal;
the second judging unit is configured to judge whether a synchronization header of the second radio frequency signal received by the receiving unit is consistent with the preset synchronization header;
The second transmitting unit is configured to transmit the second radio frequency signal to the controller if the synchronization header of the second radio frequency signal received by the receiving unit is consistent with the preset synchronization header, and otherwise, abandon transmission of the second radio frequency signal to the controller.
optionally, in a specific implementation manner provided in the embodiment of the present invention, the controller further includes: an interrupt generation unit;
the interrupt generating unit is configured to determine that data reception is completed and generate an interrupt if the second radio frequency signal obtained by the controller reaches a preset length when the second radio frequency signal is transmitted to the controller by the second transmitting unit.
optionally, in a specific implementation manner provided in the embodiment of the present invention, the preset identification information includes: and the SN code of the controller and the information of the whole vehicle.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the radio frequency communication protocol includes: sync head, data field, and checksum.
the embodiment of the invention provides a method for reducing co-channel interference of a vehicle and a vehicle-mounted keyless starting device, wherein the vehicle-mounted keyless starting device comprises: a controller and a radio frequency receiving device. The method comprises the following steps: the controller generates a preset synchronous head according to the preset identification information to serve as a synchronous head in a radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller; the controller utilizes the preset synchronous head to set the radio frequency receiving device; the controller sends a first radio frequency signal to a matching key, and writes the preset synchronization head into the matching key, so that the matching key adopts the preset synchronization head to send key information when executing a matching process; the radio frequency receiving device judges whether a synchronization head of the received key information is consistent with the preset synchronization head; if the synchronous head of the key information received by the radio frequency receiving device is consistent with the preset synchronous head, the radio frequency receiving device transmits the key information to the controller and executes a matching process, otherwise, the radio frequency receiving device gives up transmitting the key information to the controller. In the embodiment of the invention, the controller sets the radio frequency receiving device by using the preset synchronization head generated according to the preset identification information, and writes the preset synchronization head into the matching key. On the basis, the radio frequency receiving device gives up transmitting the key information to the controller for the key with the inconsistent synchronization head in the key information and the preset synchronization head, timely releases a signal channel between the unmatched key and the radio frequency receiving device, and only executes the matching process for the key with the consistent synchronization head in the key information and the preset synchronization head. Therefore, key information except the matched key is filtered by the radio frequency receiving device, communication between the radio frequency receiving device and the matched key is realized by utilizing the preset synchronization head, the effects of reducing same frequency interference in the matching process of the automobile end and the key end of the PEPS system and reducing the influence of the same frequency interference on normal matching and normal offline of the automobile are achieved.
Drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present invention;
FIG. 2 is a flowchart of a method for reducing co-channel interference of a vehicle according to an embodiment of the present invention;
FIG. 3 is a flowchart of another method for reducing co-channel interference of a vehicle according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a vehicle-mounted keyless starting device according to an embodiment of the present invention.
Detailed Description
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
an application scenario of the embodiment of the present invention is described below with reference to the drawings. Referring to fig. 1, an application scenario provided in the embodiment of the present invention is schematically illustrated, where the application scenario includes an on-vehicle keyless start device 11 and a matching key 12. The vehicle-mounted keyless start device 11 is an automobile-side device in the PEPS system, and includes a controller and a radio frequency receiving device. In practical application, the controller is in the form of a control chip, the radio frequency receiving device is in the form of a receiving chip, and the controller and the radio frequency receiving device can be integrated into a single component or can be arranged separately. The controller sends low frequency information to the matching key 12 via an antenna associated therewith. The radio frequency receiving device is used as a receiver of the automobile end in the PEPS system to receive the high-frequency information sent by the matching key 12 to the radio frequency receiving device, and communication between the automobile end and the key end is completed.
In the application scenario shown in fig. 1, an embodiment of the present invention provides a method for reducing co-channel interference of a vehicle and a vehicle-mounted keyless start device, so as to reduce co-channel interference occurring in a matching process between a vehicle end and a key end of a PEPS system, and reduce the influence of the co-channel interference on normal matching and normal offline of the vehicle.
for convenience of understanding, a method for reducing co-channel interference of a vehicle provided by an embodiment of the invention is described in detail below by using the embodiment shown in fig. 2. Referring to fig. 2, the method is applied to an in-vehicle keyless start device, which may include: a controller and a radio frequency receiving device. Specifically, the embodiment of the present invention may include the following steps:
In step S210, the controller generates a preset synchronization header as a synchronization header in the radio frequency communication protocol according to the preset identification information.
wherein the preset identification information is used for uniquely identifying the controller. The preset identification information is not limited to factory information of the controller itself, such as an SN code of the controller. In practical application, the information capable of uniquely identifying the controller can be used as preset identification information, for example, the preset identification information can be an SN code of the controller, a frame number, an engine number, or the like. In addition, the preset identification information may also be some combination information, and as in a specific implementation manner provided in the embodiment of the present invention, the preset identification information may include: SN code of controller and vehicle information. The whole vehicle information here refers to factory information of other parts on the vehicle except the controller, such as a frame number, an engine number, even an SN code of a vehicle key, and the like. When the preset identification information adopts the combined information, the relation among all parts (such as a controller, a key, an engine and the like) of the vehicle can be established through the preset identification information. When mismatching of all parts is caused by reasons such as misoperation (such as taking wrong keys), the information tracking is conveniently searched.
The radio frequency communication protocol in this step is a key matching process and a communication protocol between the vehicle-mounted keyless starting device and the key when the key is used. In practical applications, the radio frequency communication protocol may include: sync head, data field, etc. The data field refers to valid data in a radio frequency signal transmitted during communication between the vehicle-mounted keyless start device and the key, such as position information sent to the vehicle-mounted keyless start device for the key. In addition, to ensure the reliability of communication between the vehicle-mounted keyless start device and the key, in a specific implementation manner provided by the embodiment of the present invention, the radio frequency communication protocol may include: sync head, data field, and checksum. And verifying whether the information transmitted between the two is tampered by using a checksum mode, and the like.
in step S220, the controller sets the rf receiving device by using a preset sync head.
specifically, the controller sets the rf receiving device by using the preset sync header generated in step S210, so that the rf receiving device subsequently verifies the received key information by using the preset sync header.
in step S230, the controller sends a first rf signal to the matching key, and writes a predetermined sync header into the matching key.
specifically, the controller sends a first radio frequency signal to the matching key by using an antenna matched with the controller, the first radio frequency signal contains a preset synchronization head, and specifically can be located in a data field part of the first radio frequency signal, when the matching key receives the first radio frequency signal, the preset synchronization head is analyzed from the data field, and then the preset synchronization head is written into the matching key, so that the preset synchronization head can be written into the matching key. The key information is transmitted by using the preset synchronization head when the subsequent matching key executes the matching process, and meanwhile, since the controller utilizes the preset synchronization head to set the radio frequency receiving device in the step S220, the subsequent radio frequency receiving device can utilize the configured preset synchronization head to verify the key information. Wherein the key information is also transmitted in the form of radio frequency signals. In practical application, the first radio frequency signal sent by the controller is a low frequency signal, and the radio frequency signal sent by the matching key is a high frequency signal.
In step S240, the rf receiving device determines whether the sync header of the received key information is consistent with a preset sync header.
Specifically, when the radio frequency receiving device receives the key information, the synchronization head in the key information is extracted first, and whether the synchronization head of the received key information is consistent with the preset synchronization head is judged. If the sync header of the key information received by the rf receiving device is consistent with the preset sync header, step S250 is executed, otherwise, step S260 is executed.
in step S250, the rf receiving device transmits the key information to the controller to perform the matching process.
The specific matching process is known in the prior art and is not described herein again.
in step S260, the rf receiving device abandons the transmission of the key information to the controller.
Through the steps S240 to S260, when the synchronization header in the key information is inconsistent with the preset synchronization header, the radio frequency receiving device can timely release the signal channels of the automobile end and the key end. Because the time for the radio frequency receiving device to match and receive the synchronous head is extremely short, usually in a microsecond level, the signal channel is released in time, correct key information can be received, and the same frequency interference during matching is reduced.
For convenience of understanding, the embodiment shown in fig. 2 is explained as an embodiment, when the controller is shipped from a factory, the SN code of the controller is injected by the production equipment and stored in the nonvolatile memory of the controller. The controller is arranged on a vehicle in a vehicle factory, is matched with a key when being off-line, generates a synchronous head in a radio frequency communication protocol according to the SN code and the vehicle information when being matched, is provided with a radio frequency receiving device according to the generated synchronous head, and writes the vehicle synchronous head information into the key matched with the vehicle synchronous head information through a radio frequency signal. In the data exchange in the whole matching process, the data synchronization head sent by the key uses the synchronization head written into the key at the beginning of the matching so as to ensure that the controller can receive the key information, filter the rest key information and reduce the same frequency interference during the matching.
The method for reducing the co-frequency interference of the vehicle is applied to vehicle-mounted keyless starting equipment, and the vehicle-mounted keyless starting equipment comprises the following steps: a controller and a radio frequency receiving device. The method comprises the following steps: the controller generates a preset synchronous head according to the preset identification information to serve as a synchronous head in a radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller; the controller utilizes the preset synchronous head to set the radio frequency receiving device; the controller sends a first radio frequency signal to a matching key, and writes the preset synchronization head into the matching key, so that the matching key adopts the preset synchronization head to send key information when executing a matching process; the radio frequency receiving device judges whether a synchronization head of the received key information is consistent with the preset synchronization head; if the synchronous head of the key information received by the radio frequency receiving device is consistent with the preset synchronous head, the radio frequency receiving device transmits the key information to the controller and executes a matching process, otherwise, the radio frequency receiving device gives up transmitting the key information to the controller. In the embodiment of the invention, the controller sets the radio frequency receiving device by using the preset synchronization head generated according to the preset identification information, and writes the preset synchronization head into the matching key. On the basis, the radio frequency receiving device gives up transmitting the key information to the controller for the key with the inconsistent synchronization head in the key information and the preset synchronization head, timely releases a signal channel between the unmatched key and the radio frequency receiving device, and only executes the matching process for the key with the consistent synchronization head in the key information and the preset synchronization head. Therefore, key information except the matched key is filtered by the radio frequency receiving device, communication between the radio frequency receiving device and the matched key is realized by utilizing the preset synchronization head, the effects of reducing same frequency interference in the matching process of the automobile end and the key end of the PEPS system and reducing the influence of the same frequency interference on normal matching and normal offline of the automobile are achieved.
In practical applications, vehicles of the same type or vehicles of the same provider with the PEPS system may appear in a certain area (such as a parking lot), and at this time, since the frequencies and protocols of different keys are the same, when the scheme of the prior art is applied, when a key other than the vehicle works, the radio frequency signal sent out may also be received by the vehicle, so that the vehicle may be awoken by mistake. In addition, if the key of the vehicle is used to operate the vehicle, and the keys of the other vehicles are also working, the rf receiving channel (i.e. the signal channel) of the vehicle may be occupied, so that the rf signal transmitted by the key of the vehicle cannot be received, and the occasional function of the vehicle may be disabled.
In order to solve the problems of vehicle false wake-up and vehicle occasional functional failure, referring to fig. 3, on the basis of the embodiment shown in fig. 2, the method may further include:
when the matching key is used normally after the matching is completed, in step S310, the rf receiving device and the matching key continue to communicate with each other using the preset synchronization header.
that is, when the matching key is used normally, and the matching key sends a radio frequency signal, the synchronization head uses the preset synchronization head written in the key when matching, and the synchronization head in the radio frequency receiving device also uses the preset synchronization head generated when matching.
When the transmission parameter of the rf signal transmitted to the rf receiving device is consistent with the preset transmission parameter in the rf receiving device, in step S320, the rf receiving device determines that the transmitted rf signal is the second rf signal and receives the second rf signal.
The preset transmission parameters in the radio frequency receiving apparatus are configured by the controller, and the preset transmission parameters configured by the controller may include: frequency, data transmission rate, coding scheme, etc. The step realizes the identification of the key with the transmission parameter of the transmitted radio frequency signal consistent with the preset transmission parameter in the radio frequency receiving device by the radio frequency receiving device, and the second radio frequency signal is also the radio frequency signal transmitted by the same vehicle type or the vehicle key of the same supplier by the PEPS system.
In step S330, the rf receiving device determines whether the sync header of the received second rf signal is consistent with a predetermined sync header.
If the sync header of the second rf signal received by the rf receiving device is consistent with the preset sync header, step S340 is executed, otherwise, step S350 is executed.
In step S340, the rf receiving device transmits a second rf signal to the controller.
In step S350, the rf receiving device abandons the transmission of the second rf signal to the controller.
the method includes the steps that the preset identification information of each vehicle, such as SN codes, whole vehicle information and the like, is different, the synchronization head of each vehicle is also different, the synchronization head is different in radio frequency signals sent by keys, radio frequency signals sent by unmatched keys are different, when a radio frequency receiving device receives the synchronization head, hardware detects that the synchronization head is not right, data receiving is given up, a controller cannot be awakened by radio frequency signals of other keys, when a plurality of keys work simultaneously, due to the fact that the radio frequency receiving device releases a signal channel in time, the channel of the controller cannot be occupied by the radio frequency signals of other keys, the key information of the vehicle is lost, correct key information can be received, and radio frequency co-frequency interference can be greatly reduced.
optionally, in a specific implementation manner provided in the embodiment of the present invention, the method may further include: when the radio frequency receiving device transmits a second radio frequency signal to the controller, if the second radio frequency signal obtained by the controller reaches a preset length, the data receiving is determined to be completed, and an interrupt is generated.
In the specific embodiment, when the second radio frequency signal obtained by the controller reaches the preset length, the completion of data reception is determined in time, and an interrupt is generated, so that the controller can directly extract an effective signal, and convenience is provided for subsequent operation and response.
In general, the scheme for reducing co-channel interference of the embodiment of the invention reduces co-channel interference by making a software algorithm and a strategy and utilizing the existing hardware resources under the condition that the existing product hardware scheme is not changed.
compared with the above method embodiment, the embodiment of the invention also provides a corresponding device embodiment.
Referring to fig. 4, a schematic structural diagram of an on-vehicle keyless starting device according to an embodiment of the present invention is provided. The vehicle-mounted keyless starting device is used for executing the method for reducing the co-channel interference of the vehicle. The vehicle-mounted keyless start device may include: a controller 41 and a radio frequency receiving device 42. The controller 41 may include: a sync head generating unit 411, a setting unit 412, and a writing unit 413, the radio frequency receiving device 42 may include: a receiving unit 421, a judging unit 422 and a first transferring unit 423.
The synchronization header generation unit 411 is configured to generate a preset synchronization header according to preset identification information, where the preset synchronization header is used as a synchronization header in a radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller 41;
the setting unit 412 is configured to set the rf receiving device 42 by using the preset synchronization head;
the writing unit 413 is configured to send a first radio frequency signal to a matching key, and write the preset synchronization head into the matching key, so that the matching key uses the preset synchronization head to send key information when performing a matching process;
The receiving unit 421 is configured to receive key information;
the first determining unit 422 is configured to determine whether a synchronization header of the key information received by the receiving unit 421 is consistent with the preset synchronization header;
the first transmitting unit 423 is configured to transmit the key information to the controller 41 and execute the matching process if the synchronization header of the key information received by the receiving unit 421 is consistent with the preset synchronization header, and otherwise, abandon the transmission of the key information to the controller 41.
The embodiment of the invention provides vehicle-mounted keyless starting equipment, which comprises: a controller and a radio frequency receiving device. The controller generates a preset synchronous head according to preset identification information to serve as a synchronous head in a radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller; the controller utilizes the preset synchronous head to set the radio frequency receiving device; the controller sends a first radio frequency signal to a matching key, and writes the preset synchronization head into the matching key, so that the matching key adopts the preset synchronization head to send key information when executing a matching process; the radio frequency receiving device judges whether a synchronization head of the received key information is consistent with the preset synchronization head; if the synchronous head of the key information received by the radio frequency receiving device is consistent with the preset synchronous head, the radio frequency receiving device transmits the key information to the controller and executes a matching process, otherwise, the radio frequency receiving device gives up transmitting the key information to the controller. In the embodiment of the invention, the controller sets the radio frequency receiving device by using the preset synchronization head generated according to the preset identification information, and writes the preset synchronization head into the matching key. On the basis, the radio frequency receiving device gives up transmitting the key information to the controller for the key with the inconsistent synchronization head in the key information and the preset synchronization head, timely releases a signal channel between the unmatched key and the radio frequency receiving device, and only executes the matching process for the key with the consistent synchronization head in the key information and the preset synchronization head. Therefore, key information except the matched key is filtered by the radio frequency receiving device, communication between the radio frequency receiving device and the matched key is realized by utilizing the preset synchronization head, the effects of reducing same frequency interference in the matching process of the automobile end and the key end of the PEPS system and reducing the influence of the same frequency interference on normal matching and normal offline of the automobile are achieved.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the radio frequency receiving device 42 may further include: a second judging unit and a second transferring unit.
When the matching key is normally used after the matching is completed, the receiving unit 421 is further configured to continue to use the preset synchronization head for communication with the matching key; when the transmission parameter of the rf signal transmitted to the receiving unit 421 is consistent with the preset transmission parameter in the rf receiving device 42, determining that the transmitted rf signal is a second rf signal and receiving the second rf signal;
the second determining unit is configured to determine whether a synchronization header of the second radio frequency signal received by the receiving unit 421 is consistent with the preset synchronization header;
the second transmitting unit is configured to transmit the second radio frequency signal to the controller 41 if the synchronization header of the second radio frequency signal received by the receiving unit 421 is consistent with the preset synchronization header, and otherwise, abandon transmission of the second radio frequency signal to the controller 41.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the controller 41 may further include: an interrupt generation unit.
The interrupt generating unit is configured to determine that data reception is completed and generate an interrupt if the second radio frequency signal obtained by the controller 41 reaches a preset length when the second transmitting unit transmits the second radio frequency signal to the controller 41.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the preset identification information includes: the SN code of the controller 41 and the entire vehicle information.
Optionally, in a specific implementation manner provided in the embodiment of the present invention, the radio frequency communication protocol includes: sync head, data field, and checksum.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for reducing co-channel interference of a vehicle is characterized by being applied to a vehicle-mounted keyless starting device, and the vehicle-mounted keyless starting device comprises the following steps: controller and radio frequency receiving arrangement includes:
The controller generates a preset synchronous head according to the preset identification information to serve as a synchronous head in a radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller;
The controller utilizes the preset synchronous head to set the radio frequency receiving device;
The controller sends a first radio frequency signal to a matching key, and writes the preset synchronization head into the matching key, so that the matching key adopts the preset synchronization head to send key information when executing a matching process;
the radio frequency receiving device judges whether a synchronization head of the received key information is consistent with the preset synchronization head;
If the synchronous head of the key information received by the radio frequency receiving device is consistent with the preset synchronous head, the radio frequency receiving device transmits the key information to the controller and executes a matching process, otherwise, the radio frequency receiving device gives up transmitting the key information to the controller.
2. the method of claim 1, further comprising:
When the matching key is normally used after matching is completed, the radio frequency receiving device and the matching key continue to use the preset synchronization head for communication;
When the transmission parameter of the radio frequency signal transmitted to the radio frequency receiving device is consistent with the preset transmission parameter in the radio frequency receiving device, the radio frequency receiving device determines that the transmitted radio frequency signal is a second radio frequency signal and receives the second radio frequency signal;
The radio frequency receiving device judges whether a synchronization head of the received second radio frequency signal is consistent with the preset synchronization head;
And if the synchronous head of the second radio-frequency signal received by the radio-frequency receiving device is consistent with the preset synchronous head, the radio-frequency receiving device transmits the second radio-frequency signal to the controller, otherwise, the radio-frequency receiving device gives up transmitting the second radio-frequency signal to the controller.
3. The method of claim 2, further comprising: when the radio frequency receiving device transmits a second radio frequency signal to the controller, if the second radio frequency signal obtained by the controller reaches a preset length, the data receiving is determined to be finished, and an interrupt is generated.
4. The method according to any one of claims 1 to 3, wherein the preset identification information comprises: and the SN code of the controller and the information of the whole vehicle.
5. the method of claim 4, wherein the radio frequency communication protocol comprises: sync head, data field, and checksum.
6. an on-vehicle keyless start device, characterized by comprising: a controller and a radio frequency receiving device; the controller includes: the radio frequency receiving device comprises a synchronous head generating unit, a setting unit and a writing unit, and comprises: the device comprises a receiving unit, a judging unit and a first transmitting unit;
the synchronization head generating unit is used for generating a preset synchronization head according to the preset identification information to serve as the synchronization head in the radio frequency communication protocol; the preset identification information is used for uniquely identifying the controller;
the setting unit is used for setting the radio frequency receiving device by utilizing the preset synchronous head;
The writing unit is used for sending a first radio frequency signal to a matching key and writing the preset synchronization head into the matching key so as to enable the matching key to adopt the preset synchronization head to send key information when executing a matching process;
The receiving unit is used for receiving key information;
the first judging unit is used for judging whether the synchronization head of the key information received by the receiving unit is consistent with the preset synchronization head;
the first transmission unit is used for transmitting the key information to the controller and executing the matching process if the synchronization head of the key information received by the receiving unit is consistent with the preset synchronization head, otherwise, giving up transmitting the key information to the controller.
7. the apparatus of claim 6, wherein the radio frequency receiving means further comprises: a second judging unit and a second transferring unit,
When the matching key is normally used after matching is completed, the receiving unit is further used for continuing to use the preset synchronization head for communication with the matching key; when the transmission parameter of the radio frequency signal transmitted to the receiving unit is consistent with the preset transmission parameter in the radio frequency receiving device, determining that the transmitted radio frequency signal is a second radio frequency signal and receiving the second radio frequency signal;
the second judging unit is configured to judge whether a synchronization header of the second radio frequency signal received by the receiving unit is consistent with the preset synchronization header;
The second transmitting unit is configured to transmit the second radio frequency signal to the controller if the synchronization header of the second radio frequency signal received by the receiving unit is consistent with the preset synchronization header, and otherwise, abandon transmission of the second radio frequency signal to the controller.
8. the apparatus of claim 7, wherein the controller further comprises: an interrupt generation unit;
the interrupt generating unit is configured to determine that data reception is completed and generate an interrupt if the second radio frequency signal obtained by the controller reaches a preset length when the second radio frequency signal is transmitted to the controller by the second transmitting unit.
9. The apparatus according to any one of claims 6 to 8, wherein the preset identification information comprises: and the SN code of the controller and the information of the whole vehicle.
10. the device of claim 9, wherein the radio frequency communication protocol comprises: sync head, data field, and checksum.
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