CN216161140U - PKE system and host and key thereof - Google Patents
PKE system and host and key thereof Download PDFInfo
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- CN216161140U CN216161140U CN202121786954.1U CN202121786954U CN216161140U CN 216161140 U CN216161140 U CN 216161140U CN 202121786954 U CN202121786954 U CN 202121786954U CN 216161140 U CN216161140 U CN 216161140U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The utility model provides a PKE system, a host and a key thereof, wherein the host comprises a host Bluetooth master control module, a radio frequency signal transmitting module and a wireless communication module, and the key comprises a radio frequency signal receiving module and a key Bluetooth master control module; the radio frequency signal transmitting module transmits a low frequency signal, and the radio frequency signal receiving module is used for receiving the low frequency signal and sending the low frequency signal to the key Bluetooth master control module; the key Bluetooth master control module generates an event signal and sends the event signal to the host; the host Bluetooth main control module is used for receiving the event signal from the key, generating an instruction signal and sending the instruction signal to the wireless communication module; the wireless communication module outputs an instruction signal. The utility model communicates through the Bluetooth master control module, the Bluetooth technology has strong anti-interference capability, higher safety and low energy consumption, greatly reduces the power consumption of the whole system and improves the safety and anti-interference of the PKE system.
Description
Technical Field
The utility model relates to the technical field of electronic systems, in particular to a PKE (keyless entry system) system, a host and a key thereof.
Background
With the continuous development of electronic technology, a PKE (keyless entry system) system is rapidly becoming the mainstream of remote keyless entry application, and in the prior art, an automobile PKE system mainly comprises a host and a key, wherein the host sends a low-frequency signal to wake up the key, the key decodes through 433 mega high-frequency communication and sends data to the host, and the host analyzes the data received from the key. However, at present, 433 million communication has many defects, firstly, the security and confidentiality of the system are poor, and the system is easy to attack and decipher; secondly, the system works by adopting a single frequency point, the multi-path effect caused by shielding cannot be effectively resisted, and in the occasion of more data volume transmission, the channel is very crowded, the environmental interference is also very large, so that the defects of unreliable communication, unstable system and the like are caused; in addition, 433 million communication has large power consumption and higher power consumption.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of poor safety, poor anti-interference capability and high power consumption of a PKE system in the prior art, and provides a PKE system, a host and a key thereof.
The utility model solves the technical problems through the following technical scheme:
the utility model provides a host for a PKE system in a first aspect, which comprises a host Bluetooth main control module, a radio frequency signal transmitting module and a wireless communication module;
the host Bluetooth main control module is electrically connected with the wireless communication module;
the host Bluetooth master control module is used for being in Bluetooth communication connection with a key of the PKE system and receiving event signals from the key, and is also used for generating instruction signals and sending the instruction signals to the wireless communication module, wherein the instruction signals comprise instruction signals for representing unlocking or instruction signals for representing locking;
the wireless communication module is used for outputting the instruction signal;
the radio frequency signal transmitting module is used for transmitting a low frequency signal, and the low frequency signal comprises information for characterizing keys for identifying the PKE system.
Preferably, the operating frequency range of the radio frequency signal transmitting module comprises 120-130 Khz.
Preferably, the host further comprises a host XYZ triaxial antenna;
the radio frequency signal transmitting module is used for transmitting low-frequency signals through the host XYZ triaxial antenna.
Preferably, the host further comprises a host data encryption module and a host data decryption module;
the host data encryption module and the host data decryption module are respectively and electrically connected with the host Bluetooth main control module.
The second aspect of the utility model provides a key for a PKE system, which comprises a radio frequency signal receiving module and a key Bluetooth master control module;
the radio frequency signal receiving module is electrically connected with the key Bluetooth master control module;
the radio frequency signal receiving module is used for receiving a low-frequency signal and sending the low-frequency signal to the key Bluetooth master control module;
the key Bluetooth master control module is used for being in Bluetooth communication connection with a host used for the PKE system, and is also used for generating event signals and sending the event signals to the host, wherein the event signals comprise event signals used for representing that the key is close to the host or event signals used for representing that the key is far away from the host.
Preferably, the key further comprises a key XYX three-axis antenna;
the radio frequency signal receiving module is used for receiving the low-frequency signal through the key XYX three-axis antenna.
Preferably, the key further comprises a key management module;
the key management module is electrically connected with the key Bluetooth master control module;
the key management module is used for generating key signals and sending the key signals to the key Bluetooth master control module, and the key signals contain information for representing and identifying keys of the key management module.
Preferably, the key further comprises a key data encryption module and a key data decryption module;
the key data encryption module and the key data decryption module are respectively and electrically connected with the key Bluetooth master control module.
Preferably, the key further comprises a power management module;
the power management module is respectively and electrically connected with the key Bluetooth master control module and the radio frequency signal receiving module.
A third aspect of the utility model provides a PKE system comprising a host as described above for a PKE system and a key as described above for a PKE system.
The positive progress effects of the utility model are as follows:
the Bluetooth master control module has the advantages of low power consumption, high safety and strong anti-interference capability, is normally in a dormant mode and is only awakened when receiving a signal containing self information, so that the power consumption of a PKE system is greatly reduced; in addition, the host and the key are both provided with X/Y/Z triaxial antennas, so that the coverage range of signals is increased, and the anti-interference performance of the signals is enhanced again; and the data encryption module and the data decryption module are matched with the encryption algorithm of the Bluetooth protocol, so that double encryption protection of data is realized, and the signal safety is further improved.
Drawings
Fig. 1 is a schematic structural diagram of the PKE system of the present invention and its host and key.
Fig. 2 is a flow chart of the PKE system host according to the present invention.
Fig. 3 is a schematic flow chart of the key of the PKE system of the present invention.
Fig. 4 is a schematic diagram of the communication range of the PKE system and its host and key of the present invention.
Fig. 5 is a schematic diagram of the PKE system of the present invention and its host and key components.
Detailed Description
The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.
The present embodiment provides a PKE system, as shown in fig. 1, including a host 10 and a key 20; the host 10 comprises a radio frequency signal transmitting module 101, a host Bluetooth main control module 102, a host data encryption module 103, a host data decryption module 104, a wireless communication module 105 and a host XYZ triaxial antenna 106; the key 20 comprises a radio frequency signal receiving module 201, a key bluetooth master control module 202, a key data encryption module 203, a key data decryption module 204, a XYX three-axis antenna 205 and a power management module 207.
Because the host bluetooth main control module 102 has a small volume and is convenient for integration, the utility model can be used for not only automobiles, but also small vehicles such as electric bicycles, motorcycles and the like, and the following automobiles are taken as examples:
the host 10 is directly powered by the automobile battery, but this embodiment is not limited to the battery, as shown in fig. 2, the host 10 is powered on to complete initialization, control the rf signal transmitting module 101 to periodically transmit a low frequency signal (low frequency wake-up frame), and the rf signal transmitting module 101 may transmit the low frequency signal in different directions through the host XYZ triaxial antenna 106.
The key 20 is powered by the power management module 207. in an alternative embodiment, the power management module 207 uses a 3.3V button cell to power the other modules of the key, and one button cell can last for one or two years. Further, the radio frequency signal receiving module 201 and the key bluetooth master control module 202 both support a low power consumption mode, and can provide a longer working time for the key terminal. Further, the power management module 207 is provided with a battery electricity meter and an indicator light inside, and is used for detecting the residual electricity of the battery, and when the residual electricity of the battery is too low, the indicator light flickers to remind a vehicle owner to replace the battery in time. As shown in fig. 3, the key 20 enters the low power consumption mode after being powered on, and the power consumption of the key 20 is below 10 uA.
The frequency of the low frequency signal transmitted by the rf signal transmitting module 101 is between 120Khz and 130Khz, and the communication range of the low frequency signal is as shown in fig. 4, and the radius of the low frequency signal is about two meters, although the embodiment is not limited to this range. In an alternative embodiment, the frequency of the low-frequency signal transmitted by the rf signal transmitting module 101 is 125Khz, but the embodiment is not limited to this frequency. Furthermore, the low-frequency signal contains key information, the encryption standard adopts the Manchester encoding technology, and the host 10 integrates the encryption algorithm into the host data encryption module 103, so that the transmitted low-frequency signal has higher security.
Since the radio frequency signal transmitting module 101 consumes power when transmitting the low frequency signal, in order to reduce power consumption, in another optional embodiment, the radio frequency signal transmitting module 101 does not transmit the low frequency signal cyclically all the time, but is in a sleep state, and the radio frequency signal transmitting module 101 starts to operate only when a vehicle owner touches a vehicle door.
When the key 20 enters the low-frequency signal communication range of the host, as shown in fig. 3, the rf signal receiving module 201 receives the low-frequency signal transmitted by the host 10, and the key 20 can sense the low-frequency signal from different directions through the key XYZ three-axis antenna 206. Further, after receiving the low-frequency signal, the radio frequency signal receiving module 201 decrypts the low-frequency signal by the key bluetooth decryption module 204, and then the radio frequency signal receiving module 201 compares the key information in the decrypted low-frequency signal with the key information stored in the radio frequency signal receiving module 201, and if the two can be matched, sends the low-frequency signal (low-frequency wake-up frame) to the key master control bluetooth module 202 and wakes up the key master control bluetooth module 202.
The bluetooth key module 202 is awakened by the low frequency signal to generate an approaching signal (approaching broadcast frame), the approaching signal contains the ID information of the key 20, the ID information is encrypted by using the AES-128CCM encryption algorithm for data packet encryption, and the key 20 integrates the encryption algorithm into the bluetooth key module 202. In an alternative embodiment, the bluetooth key master module 202 sends the proximity signal to the bluetooth key encryption module 203 for further encryption, and finally the bluetooth key master module 202 sends the proximity signal after double encryption to the bluetooth host master module 102 by means of bluetooth communication. After the bluetooth key control module 202 sends the approach signal, the bluetooth key control module 202 enters the sleep state again to wait for the next event.
As shown in fig. 2, after receiving the proximity signal sent by the key 20, the host bluetooth master module 102 sends the proximity signal to the host data decryption module 104 for data decryption, and then the host data decryption module 104 returns the decrypted proximity signal to the host bluetooth master module 102.
Further, the host bluetooth master control module 102 verifies the decrypted approaching signal, compares the key ID information in the signal with the key ID information stored in the host bluetooth master control module 102 to see whether the signals are matched, and generates an unlocking instruction after the verification passes through the host bluetooth master control module 102. In an alternative embodiment, the unlocking command is to unlock a door lock on the vehicle door, and the embodiment is not limited to the door lock.
Further, the host bluetooth main control module 102 issues an unlocking instruction to the lock control module through the wireless communication module 105, and the corresponding lock control module executes an unlocking action. In an alternative embodiment, the wireless communication module 105 adopts a 485 communication module, and is compatible with lock control units of different manufacturers in terms of hardware, and a protocol can be customized in terms of software.
When the key 20 is far from the low-frequency signal communication range of the host 10, that is, the owner of the vehicle leaves the vehicle for more than 2 meters with the key 20, as shown in fig. 3, the key bluetooth master control module 202 generates a far signal (far from the broadcast frame), which contains the ID information of the key 20 itself, the ID information is encrypted by using the AES-128CCM encryption algorithm for data packet encryption, and the key 20 integrates the encryption algorithm into the key bluetooth master control module 202. In an alternative embodiment, the bluetooth key master module 202 sends the remote signal to the bluetooth key encryption module 203 for further encryption, and finally the bluetooth key master module 202 sends the double-encrypted remote signal to the bluetooth host master module 102 through bluetooth communication. After the bluetooth key control module 202 sends the remote signal, the bluetooth key control module 202 enters the sleep state again to wait for the next event.
As shown in fig. 2, after receiving the remote signal sent by the key 20, the host bluetooth master module 102 sends the remote signal to the host data decryption module 104 for data decryption, and then the host data decryption module 104 returns the decrypted remote signal to the host bluetooth master module 102.
Further, the host bluetooth master control module 102 verifies the decrypted remote signal, compares the key ID information in the signal with the key ID information stored in the host bluetooth master control module 102 to see whether the remote signal is matched, and generates a lock closing instruction by the host bluetooth master control module 102 after the verification is passed.
Further, the host bluetooth main control module 102 issues an unlocking instruction to the lock control module through the wireless communication module 105, and the corresponding lock control module executes an unlocking action.
In an alternative embodiment, the host bluetooth master control module 102 does not directly issue the unlocking instruction, but maintains the current state of the lock for a period of time and then performs the next operation, for example, the set time is one minute, if the host 10 does not receive any signal sent by the key 20 within one minute, the host can directly issue the unlocking instruction to the lock control module through the wireless communication module 105, and the corresponding lock control module executes the unlocking action. If the master unit 10 receives other signals from the key 20 within one minute, the other signals are processed and the previous lock-off command is not transmitted.
As shown in fig. 4, the communication range of the bluetooth signal is about 10 meters, and as an alternative embodiment, when the key 20 is in the bluetooth communication range of the host 10, as shown in fig. 3, the owner presses the key on the key 20, and the key management module 205 sends a key signal containing key information to wake up the bluetooth key control module 202.
In an alternative embodiment, the key management module 205 on the key 20 includes functions of opening, closing, opening a trunk, closing a trunk, and the like.
After the key bluetooth master control module 202 is awakened by the key signal, a key data frame is generated according to the key signal, the key data frame not only contains the self ID information of the key 20, but also includes the key information, the self ID information of the key 20 is encrypted by using the AES-128CCM encryption algorithm for data packet encryption, and the key 20 integrates the encryption algorithm into the key bluetooth master control module 202. In an alternative embodiment, the key bluetooth master module 202 sends the key data frame to the key bluetooth encryption module 203 for further encryption, and finally the key bluetooth master module 202 sends the double-encrypted key data frame to the host bluetooth master module 102 through bluetooth communication. After the key bluetooth master control module 202 sends the key data frame, the key bluetooth master control module 202 enters the sleep state again to wait for the next event.
As shown in fig. 2, the host bluetooth master module 102 sends the proximity signal to the host data decryption module 104 for data decryption after receiving the key data frame sent by the key 20, and then the host data decryption module 104 returns the decrypted key data frame to the host bluetooth master module 102.
Further, the host bluetooth master control module 102 verifies the decrypted key data frame, compares the key ID information in the signal with the key ID information stored in the host bluetooth master control module 102 to see whether the key ID information is matched, and analyzes the key information in the key data frame after verification, and generates a corresponding key instruction, for example, when the vehicle owner presses the window key, the host bluetooth master control module 102 generates the window instruction.
Further, the bluetooth master control module 102 issues the windowing instruction to the lock control module through the wireless communication module 105, and the corresponding lock control module executes the windowing operation, which is not limited to the windowing instruction in this embodiment.
As shown in fig. 5, the PKE system includes a host and a plurality of keys, each of which is distinguished by a different ID. One host can respond to the approaching event, the departing event and different key events of a plurality of keys at the same time, generate corresponding instructions and send the corresponding instructions to the butted lock control module through the wireless communication module for operation.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (10)
1. A host used for a PKE system is characterized by comprising a host Bluetooth main control module, a radio frequency signal transmitting module and a wireless communication module;
the host Bluetooth main control module is electrically connected with the wireless communication module;
the host Bluetooth master control module is used for being in Bluetooth communication connection with a key of the PKE system and receiving event signals from the key, and is also used for generating instruction signals and sending the instruction signals to the wireless communication module, wherein the instruction signals comprise instruction signals for representing unlocking or instruction signals for representing locking;
the wireless communication module is used for outputting the instruction signal;
the radio frequency signal transmitting module is used for transmitting a low frequency signal, and the low frequency signal comprises information for characterizing keys for identifying the PKE system.
2. The host for a PKE system of claim 1,
the working frequency range of the radio frequency signal transmitting module comprises 120-130 Khz.
3. The host for a PKE system of claim 1,
the host machine further comprises a host machine XYZ triaxial antenna;
the radio frequency signal transmitting module is used for transmitting low-frequency signals through the host XYZ triaxial antenna.
4. The host for a PKE system of claim 1,
the host also comprises a host data encryption module and a host data decryption module;
the host data encryption module and the host data decryption module are respectively and electrically connected with the host Bluetooth main control module.
5. A key for a PKE system is characterized in that the key comprises a radio frequency signal receiving module and a key Bluetooth master control module;
the radio frequency signal receiving module is electrically connected with the key Bluetooth master control module;
the radio frequency signal receiving module is used for receiving a low-frequency signal and sending the low-frequency signal to the key Bluetooth master control module;
the key Bluetooth master control module is used for being in Bluetooth communication connection with a host used for the PKE system, and is also used for generating event signals and sending the event signals to the host, wherein the event signals comprise event signals used for representing that the key is close to the host or event signals used for representing that the key is far away from the host.
6. The key for use in a PKE system of claim 5,
the key further comprises a key XYX three-axis antenna;
the radio frequency signal receiving module is used for receiving the low-frequency signal through the key XYX three-axis antenna.
7. The key for use in a PKE system of claim 5,
the key also comprises a key management module;
the key management module is electrically connected with the key Bluetooth master control module;
the key management module is used for generating key signals and sending the key signals to the key Bluetooth master control module, and the key signals contain information for representing and identifying keys of the key management module.
8. The key for use in a PKE system of claim 5,
the key also comprises a key data encryption module and a key data decryption module;
the key data encryption module and the key data decryption module are respectively and electrically connected with the key Bluetooth master control module.
9. The key for use in a PKE system of claim 5,
the key further comprises a power management module;
the power management module is respectively and electrically connected with the key Bluetooth master control module and the radio frequency signal receiving module.
10. A PKE system comprising a host for a PKE system according to any one of claims 1 to 4 and a key for a PKE system according to any one of claims 5 to 9.
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| CN202121786954.1U CN216161140U (en) | 2021-08-02 | 2021-08-02 | PKE system and host and key thereof |
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| CN202121786954.1U CN216161140U (en) | 2021-08-02 | 2021-08-02 | PKE system and host and key thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115701158A (en) * | 2022-10-28 | 2023-02-07 | 重庆长安汽车股份有限公司 | Method and device for realizing vehicle control function of Bluetooth entity key RKE |
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2021
- 2021-08-02 CN CN202121786954.1U patent/CN216161140U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115701158A (en) * | 2022-10-28 | 2023-02-07 | 重庆长安汽车股份有限公司 | Method and device for realizing vehicle control function of Bluetooth entity key RKE |
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