Commercial vehicle trailer TPMS sensor ID automatic identification method and system

Abstract

The invention provides a commercial vehicle trailer TPMS sensor ID automatic identification method and system, and relates to the technical field of automotive electronics, and the method comprises the steps that a vehicle head receiver establishes a point-to-point wireless communication link with a trailer repeater through a low-power-consumption Bluetooth protocol; based on a point-to-point wireless communication link, the headstock receiver generates a dynamic encryption key, embeds an identity verification instruction, and sends the dynamic encryption key to the trailer repeater through an encryption channel; the trailer repeater extracts the secret key and performs similarity matching calculation with a local legal vehicle head registry; and when the matching degree reaches a safety threshold value, the trailer relay reads the sensor ID set and packages the sensor ID set into a structured data packet. According to the invention, from equipment screening and identity verification during communication link establishment to dynamic encryption and integrity verification during data transmission, the data is prevented from being tampered in the transmission process, the legality of the ID source of the sensor is ensured, and a guarantee is provided for the reliability of the tire monitoring data of the whole vehicle.

Description

TECHNICAL FIELD

[0001] The application relates to the field of automobile electronics, in particular to a commercial vehicle trailer TPMS sensor ID automatic identification method and system. BACKGROUND

[0002] The head and trailer of a commercial vehicle (such as a tractor truck) are of a detachable structure. In a logistics transportation scenario, the trailer often needs to be replaced with different heads to meet scheduling requirements. As a key component for ensuring driving safety, a tire pressure monitoring system (TPMS) needs to monitor the pressure state of all vehicle tires (including 6-10 tires of the head and 8-12 tires of the trailer) in real time. Precise binding of sensor IDs and tire positions is a core prerequisite for effective monitoring.

[0003] In the prior art, when the trailer is replaced with a new head, the receiver of the new head cannot automatically identify the TPMS sensor IDs on the trailer, and the sensor IDs and their corresponding tire position information need to be manually entered by a person. This process not only consumes time and effort, but also may cause ID and position binding errors due to human operation errors, which may further cause monitoring data distortion (such as false reporting of tire pressure abnormalities).

[0004] In addition, although some solutions support wireless transmission of sensor IDs, they lack strict identity verification and encryption mechanisms, which may pose a security risk of data tampering. Moreover, when the vehicle configuration (such as the number of tires and the type of axle) changes, the display screen may not automatically adapt to update the layout, and manual re-adjustment may be required, which may affect monitoring efficiency and driving safety. SUMMARY

[0005] The technical problem to be solved by the application is to provide a commercial vehicle trailer TPMS sensor ID automatic identification method and system. From device screening and identity verification at the time of communication link establishment to dynamic encryption and integrity verification in data transmission, the application not only prevents data tampering during transmission, but also ensures the legitimacy of the source of sensor IDs, thereby providing a guarantee for the reliability of monitoring data for all vehicle tires.

[0006] To solve the above technical problems, the technical solution of the application is as follows: In a first aspect, a commercial vehicle trailer TPMS sensor ID automatic identification method is provided, which comprises the following steps: Step 1: The head receiver establishes a point-to-point wireless communication link with the trailer repeater through a Bluetooth Low Energy protocol. Step 2: Based on the point-to-point wireless communication link, the head receiver generates a dynamic encryption key and embeds an identity verification instruction, and sends them to the trailer repeater through an encrypted channel. The trailer repeater extracts the key and performs a similarity matching calculation with a local legal head registration table. When the matching degree reaches a safety threshold, the trailer repeater reads a set of sensor IDs and encapsulates them into a structured data packet. Step 3, check and parse the structured data packet, extract the trailer tire pressure sensor ID set; convert the ID set to the trailer tire ID-position mapping table; at the same time, convert the local car head ID set to the car head tire ID-position mapping table; perform database join on the trailer tire ID-position mapping table and the car head tire ID-position mapping table, and generate a global tire database containing the binding relationship of the whole vehicle tire position identification and sensor ID; Step 4, the car head receiver calls the global tire database, dynamically configures the tire ID display area layout of the display screen according to the distribution characteristics of the tire position identification in the global tire database, and automatically assigns each sensor ID to the corresponding display area of the mapped tire position identification.

[0007] Further, step 1, the car head receiver establishes a point-to-point wireless communication link with the trailer repeater through the low-power Bluetooth protocol, including: The car head receiver starts low-power Bluetooth broadcast scanning, periodically captures the repeater broadcast data packet within the communication range, and extracts the device type identifier in the data packet; The device type identifier is calculated with the preset trailer repeater code library for binary similarity, and the candidate device set with a matching degree exceeding a dynamic threshold is selected as the primary screening result according to the calculation result; For the primary screening result, measure the received signal strength value of each device; based on the signal attenuation characteristics, perform compensation calculation to generate a stability index; select the device set with an index greater than the stability threshold as the secondary screening result; The secondary screening result is sorted in descending order of stability index, and the highest bit device is selected as the target repeater, and a connection request containing an encrypted session parameter is sent to it; Receive the encrypted response data packet returned by the target repeater, extract the identity confirmation code after decryption, and perform consistency check with the pre-stored trailer device feature code, and establish a point-to-point wireless communication link after the check is passed.

[0008] Further, step 2, based on the point-to-point wireless communication link, the car head receiver generates a dynamic encryption key and embeds an identity verification instruction, which is sent to the trailer repeater through an encrypted channel; the trailer repeater extracts the key and performs similarity matching calculation with the local legal car head registration table; when the matching degree reaches the safety threshold, the trailer repeater reads the sensor ID set and encapsulates it as a structured data packet, including: Based on the point-to-point wireless communication link, obtain the real-time clock signal of the car head receiver as the first time source, and read the device unique serial number as the identity source; concatenate the first time source and the identity source at the byte level to generate an original data block; perform a secure hash digest calculation on the original data block to generate a fixed-length dynamic encryption key; Embed the dynamic encryption key into the protocol payload field of the authentication instruction to construct an encrypted authentication instruction frame; perform channel layer encryption processing on the instruction frame using the Advanced Encryption Standard algorithm to generate an encrypted transmission data block, which is then transmitted to the trailer repeater; Based on the instructions received by the trailer repeater, the protocol payload field of the received instructions is parsed and the dynamic encryption key is extracted as the verification object; using the verification object as input, the legitimate head unit device registry entries stored on the local end are traversed and a similarity matching calculation is performed to generate a matching score for each entry; when the matching score of an entry reaches a preset security threshold, a verification pass flag is generated; In response to a verification pass flag, a set of trailer tire pressure sensor IDs is read from a non-volatile memory as an original data set; a data enhancement operation is performed on the original data set to generate an enhanced data set, namely, a corresponding physical tire position code is appended to each sensor ID and a cyclic redundancy check code is generated for each ID-position combination; and the enhanced data set is used as input, and an encapsulation calculation is performed according to the data frame structure rules of the vehicle bus communication protocol to generate a structured data packet.

[0009] Furthermore, in step 3, the structured data packet is verified and parsed to extract the trailer tire pressure sensor ID set; the ID set is converted into a trailer tire ID-position mapping table; the local vehicle head ID set is converted into a vehicle head tire ID-position mapping table; the trailer tire ID-position mapping table and the vehicle head tire ID-position mapping table are combined in a database association to generate a global tire database containing the binding relationship between the tire position identifiers and sensor IDs of all vehicles, including: The vehicle head receiver performs integrity check on the structured data packet, including: extracting the check code field in the structured data packet; recalculating the check value of the structured data packet payload; when the recalculated check value is consistent with the extracted check code field, determining that the data packet is a valid data packet; Based on the valid data packet, disassemble the data packet according to a preset data structure rule to obtain a field set; extract the trailer tire pressure sensor ID and its bound tire location identifier from the field set; and generate a trailer tire ID-location mapping table using the extracted ID and location identifier as input; Based on the valid data packet, read the head tire pressure sensor ID set stored locally in the head receiver, and convert the ID set into a head tire ID-position mapping table; Perform a union operation on the trailer tire ID-position mapping table and the vehicle tire ID-position mapping table; when duplicate IDs exist for the same position identifier, the ID record in the trailer mapping table is retained first; and a global mapping table containing all tire position identifiers and corresponding sensor IDs is generated; A global tire database is constructed based on the global mapping table, and a unique database index is assigned to each sensor ID in sequence, and a bidirectional binding relationship is established between the position identifier and the index number.

[0010] Further, in step 4, the vehicle head receiver calls the global tire database, dynamically configures the tire ID display area layout of the display screen according to the distribution characteristics of the tire position identifier in the global tire database, and automatically assigns each sensor ID to the display area corresponding to the mapped tire position identifier, including: Call the global tire database, and traverse all records to count the number of tires on the vehicle head steering axle, drive axle and trailer load-bearing axle; based on the type distribution of the axle, calculate the display weight coefficient with the number as input; Based on the weight coefficient, the horizontal area of the display screen is divided into main display areas according to the proportion of the weight of the vehicle head steering axle, the weight of the drive axle and the weight of the trailer load-bearing axle, and each main display area is assigned an equal-width and equal-height rectangular sub-area equal to the number of tires of the corresponding axle type; Based on the layout of the rectangular sub-area, sort the database records in the spatial order of the tire position identifier, and bind the sorted sensor ID to the rectangular sub-area of the corresponding axle type display area in sequence to generate an initial mapping table; Traverse each rectangular sub-area binding record of the initial mapping table, and identify the sub-area with multiple sensor IDs as a conflict area set; Extract the receiving time stamp of all sensor IDs in each conflict area from the conflict area set; select the ID with the latest time stamp as the effective binding; move the covered old ID record to the database exception log; in response to the covered ID record, trigger a multi-level alarm prompt, including displaying a warning icon in the corresponding sub-area of the display screen and sending an exception code through the vehicle CAN bus; integrate the conflict processing result and the binding relationship of the non-conflict area to generate a final mapping table; Refresh the display screen based on the final mapping table, and render the bound sensor ID and its real-time monitoring data in each rectangular sub-area; when the global tire database is updated or an alarm prompt is received, the following sequence of operations is automatically triggered: Statistical tire position identifier distribution characteristics and calculate weight coefficient; Dynamically configure display screen layout parameters based on weight coefficient; Execute sensor ID and display area mapping assignment to generate a new mapping table; Perform conflict detection and processing on the new mapping table, and output the updated final mapping table; Based on the updated final mapping table, start the display refresh process.

[0011] In a second aspect, a commercial vehicle trailer TPMS sensor ID automatic identification system includes: Establish a module for the vehicle head receiver to establish a point-to-point wireless communication link with the trailer repeater via the low-power Bluetooth protocol; The structured module is used to generate a dynamic encryption key and embed authentication instructions in the vehicle head receiver based on a point-to-point wireless communication link, and then send it to the trailer repeater through an encrypted channel. The trailer repeater extracts the key and performs a similarity match calculation with the local legal vehicle head registry. When the match reaches a security threshold, the trailer repeater reads the sensor ID set and encapsulates it into a structured data packet. A mapping module is configured to verify and parse the structured data packet, extract the trailer tire pressure sensor ID set, convert the ID set into a trailer tire ID-position mapping table, and simultaneously convert the local vehicle head ID set into a vehicle head tire ID-position mapping table. The trailer tire ID-position mapping table is then combined with the vehicle head tire ID-position mapping table to generate a global tire database containing the binding relationships between all vehicle tire position identifiers and sensor IDs. The dynamic configuration module is used for the head-mounted receiver to call the global tire database, dynamically configure the tire ID display area layout of the display screen according to the distribution characteristics of the tire position identifiers in the global tire database, and automatically assign each sensor ID to the display area corresponding to its mapped tire position identifier.

[0012] According to a third aspect, a computing device includes: one or more processors; The storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the method.

[0013] In a fourth aspect, a computer-readable storage medium stores a program, which implements the method when executed by a processor.

[0014] The above solution of the present invention includes at least the following beneficial effects: The communication link is automatically established through the low-power Bluetooth protocol and the identification and matching of the sensor ID are completed, which changes the cumbersome process of traditional manual input. After the trailer changes the tractor, the driver does not need to stop and manually operate, and the binding of the ID and the tire position is automatically completed during the driving process, which improves the logistics transportation efficiency. The dynamic encryption key and the identity verification mechanism are adopted to ensure that only the legal tractor and trailer can establish communication, effectively preventing illegal equipment access and data tampering. Through the steps of integrity check and conflict detection, invalid data can be filtered and ID binding errors can be corrected, which avoids the distortion of monitoring data caused by manual misoperation and ensures that the driver can accurately obtain the pressure state of each tire and timely handle abnormal situations. The construction of the global tire database realizes the unified management of the tractor and trailer tire data, and the function of dynamically configuring the display screen layout can automatically adjust the display area according to the vehicle axle type distribution, tire quantity and other configuration changes. When the number of vehicle tires increases or decreases, the axle type changes or the trailer is replaced, the display content is quickly updated. By calculating the display weight coefficient, the tire information of the key parts such as the steering axle and the driving axle occupies a more reasonable proportion on the display screen, and the sensor ID is bound according to the spatial order, so that the screen layout and the actual tire position of the vehicle are one-to-one corresponding. The driver can intuitively and quickly identify the state of each position tire, combine the multi-level alarm prompt, timely grasp the fault information and accurately locate the problem tire. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a flowchart of a commercial vehicle trailer TPMS sensor ID automatic identification method provided by an embodiment of the present application.

[0016] Figure 2 is a schematic diagram of a commercial vehicle trailer TPMS sensor ID automatic identification system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0017] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0018] As Figure 1 shown, an embodiment of the present application proposes a commercial vehicle trailer TPMS sensor ID automatic identification method, which comprises the following steps: Step 1, the tractor receiver establishes a point-to-point wireless communication link with the trailer repeater through the low-power Bluetooth protocol; Step 2, based on the point-to-point wireless communication link, the head receiver generates a dynamic encryption key and embeds an identity verification instruction, and sends it to the trailer repeater through an encrypted channel; the trailer repeater extracts the key and performs a similarity matching calculation with the local legal head register; when the matching degree reaches the safety threshold, the trailer repeater reads the sensor ID set and encapsulates it as a structured data packet; Step 3, verify and parse the structured data packet, extract the trailer tire pressure sensor ID set; convert the ID set to a trailer tire ID-location mapping table; at the same time, convert the local head ID set to a head tire ID-location mapping table; perform a database join on the trailer tire ID-location mapping table and the head tire ID-location mapping table, and generate a global tire database containing the binding relationship between the tire position identifier and the sensor ID of the whole vehicle; Step 4, the head receiver calls the global tire database, and according to the distribution characteristics of the tire position identifier in the global tire database, dynamically configures the tire ID display area layout of the display screen, and automatically assigns each sensor ID to the display area corresponding to the mapped tire position identifier.

[0019] In the embodiment of the application, a point-to-point wireless communication link is established through a low-power Bluetooth protocol, which can not only meet the stable data transmission requirements between the head and the trailer, but also reduce device energy consumption and prolong the endurance time due to the low-power characteristics; at the same time, the point-to-point communication mode can reduce signal interference and improve the stability and anti-interference ability of the communication link; the dynamic encryption key combined with the identity verification mechanism can effectively block illegal device access, prevent fake instructions or malicious attacks, and improve the security of the communication process; only when the matching degree reaches the safety threshold, the sensor ID data packet is encapsulated, ensuring that the transmitted sensor data comes from a legally associated trailer; the verification and parsing of the structured data packet can filter invalid or error data, ensuring the accuracy of the extracted sensor ID set; the tire ID-location mapping table of the head and the trailer is generated respectively and joined, realizing the integration of the whole vehicle tire data and forming a complete and unified global tire database; according to the distribution characteristics of the tire position identifier in the global database, the display screen layout is dynamically configured, which can make the display content accurately correspond to the actual tire position, allowing the driver to intuitively and quickly identify the sensor information of each tire, and improve the information acquisition efficiency.

[0020] In a preferred embodiment of the application, the above-mentioned step 1, the head receiver establishes a point-to-point wireless communication link with the trailer repeater through a low-power Bluetooth protocol, comprising: Step 11, the head receiver starts a low-power Bluetooth broadcast scan, periodically captures the repeater broadcast data packet within the communication range, and extracts the device type identifier in the data packet; Step 12, the device type identifier is subjected to a binary similarity calculation with a preset trailer repeater code library, a candidate device set with a matching degree exceeding a dynamic threshold is screened according to a calculation result, and the candidate device set is taken as a primary screening result; Step 13, for the primary screening result, a received signal strength value of each device is measured, a stability index is generated by a compensation calculation based on a signal attenuation characteristic, and a device set with an index greater than a stability threshold is screened as a secondary screening result. Step 14, the secondary screening result is sorted in descending order of the stability index, and a highest bit device is selected as a target repeater, and a connection request containing an encrypted session parameter is sent to the target repeater. Step 15, an encrypted response data packet returned by the target repeater is received, an identity confirmation code is extracted after decryption, consistency verification is performed on the identity confirmation code and a pre-stored trailer device feature code, and a point-to-point wireless communication link is established after the verification is passed.

[0021] In the embodiment of the application, potential trailer repeaters around can be quickly found through periodic scanning and extraction of the device type identifier, and a basis is provided for subsequent screening, and meanwhile, the low power consumption characteristic can reduce energy consumption; the primary screening through the binary similarity calculation can effectively exclude devices not belonging to the trailer repeater, reduce the subsequent processing range, and improve the screening efficiency; the stability index obtained through the compensation calculation considering the signal attenuation characteristic can more accurately evaluate the communication stability of the device, and screen devices with more reliable communication quality, thereby providing a guarantee for establishing a stable communication link; the device with the highest stability index is selected as the target repeater, which can guarantee the stability of the subsequent communication link to the greatest extent, and the addition of the encrypted session parameter lays a foundation for communication security; the identity confirmation code is extracted through decryption and verified with the pre-stored feature code, which can ensure the legitimacy of the target repeater, prevent illegal devices from accessing, further improve the security of the communication, and finally establish a reliable point-to-point communication link.

[0022] In the embodiment of the application, when specifically applied, the following technical solutions can be used to realize it, for example: In the above step 11, the vehicle head receiver starts a low-power Bluetooth broadcast scan at a fixed time interval (for example, once every 2 seconds), continuously captures broadcast data packets sent by all devices within a certain range (usually 10-30 meters) during the scan process, and extracts specific field information for identifying the device type, that is, the device type identifier, from each captured data packet.

[0023] The extracted device type identifier is compared with the standard code stored in the preset trailer repeater code library in binary bits one by one, the number of same bits is counted, and the binary similarity is calculated; according to the requirement of the device matching accuracy in the actual application scene, a dynamically changing threshold (such as 80%) is set, and the devices with a similarity greater than the threshold are screened out to form a candidate device set as a primary screening result.

[0024] In the above step 13, for each device in the primary screening result, the receiver built-in signal strength detection module is used to measure and record the received signal strength value in real time; according to the attenuation model (such as the attenuation law with the increase of distance) of the wireless signal in the propagation process, the measured signal strength value is compensated and calculated to eliminate the influence of distance and other factors on the signal strength, and a stability index reflecting the communication stability of the device is obtained; a stability threshold (such as a certain fixed value) is set, and the devices with a stability index greater than the threshold are screened out to form a secondary screening result.

[0025] In the above step 14, all devices in the secondary screening result are sorted in descending order of their stability indexes; the device with the highest stability index, i.e. the first one in the sorting, is selected as the target repeater; a connection request containing an encrypted session parameter (initial parameter for subsequent encrypted communication) is sent to the target repeater.

[0026] In the above step 15, the encrypted response data packet returned by the target repeater for the connection request is decrypted using the pre-stored decryption key in the truck receiver, and the identity verification code is extracted therefrom; the extracted identity verification code is compared with the trailer device feature code pre-stored in the receiver bit by bit to check whether they are completely consistent; if consistent, the verification is passed, and the point-to-point wireless communication link between the truck receiver and the trailer repeater is established.

[0027] In a preferred embodiment of the application, in the above step 2, based on the point-to-point wireless communication link, the truck receiver generates a dynamic encryption key and embeds an identity verification instruction, and sends it to the trailer repeater through an encrypted channel, and the trailer repeater extracts the key and performs similarity matching calculation with the local legal truck registration table; when the matching degree reaches the safety threshold, the trailer repeater reads the sensor ID set and encapsulates it as a structured data packet, including: Step 21, based on the point-to-point wireless communication link, the real-time clock signal of the truck receiver is obtained as a first time source, and the device unique serial number is read as an identity source; the first time source and the identity source are byte-level spliced to generate an original data block; a secure hash digest calculation is performed on the original data block to generate a fixed-length dynamic encryption key; Step 22, embed the dynamic encryption key in the protocol payload field of the identity authentication instruction, build an encrypted authentication instruction frame; perform channel layer encryption processing on the instruction frame through the advanced encryption standard algorithm to generate an encrypted transmission data block, and transmit to the trailer repeater; Step 23, based on the instruction received by the trailer repeater, parse the protocol payload field of the received instruction, extract the dynamic encryption key as a verification object; take the verification object as input, traverse the legal vehicle head device registration table entries stored in the local end, perform similarity matching calculation to generate each entry matching degree score; when there is an entry matching degree score reaching a preset security threshold, generate a verification pass flag; Step 24, in response to the verification pass flag, read the trailer tire pressure sensor ID set from the non-volatile memory as an original data set; perform data enhancement operation on the original data set to generate an enhanced data set, that is, append the corresponding physical tire position code to each sensor ID and generate a cyclic redundancy check code for each ID-position combination; take the enhanced data set as input, perform packaging calculation according to the data frame structure rule of the vehicle bus communication protocol, and generate a structured data packet.

[0028] In the embodiment of the application, the dynamic encryption key generated based on the real-time clock signal and the device unique serial number has timeliness and uniqueness, which can effectively avoid the risk of fixed key cracking and reuse, and improve the encryption security of subsequent communication; by embedding the dynamic encryption key in the instruction frame and performing overall encryption, a double encryption protection mechanism is formed, which can not only ensure the confidentiality of the identity authentication instruction, but also prevent the instruction from being tampered with or eavesdropped during transmission; through strict similarity matching calculation, the legal vehicle head receiver can be accurately identified, and only the authorized vehicle head can obtain the sensor data of the trailer, thereby ensuring the access security of the data; the data enhancement operation establishes a clear correspondence between the sensor ID and the actual physical position of the tire, and the cyclic redundancy check code ensures the integrity of the data during transmission; the structured data packet packaged according to the standard protocol is convenient for the vehicle head receiver to quickly and accurately parse, and provides a reliable and standardized data basis for subsequent data processing and display.

[0029] In the embodiment of the application, when specifically applied, the following technical solutions can be used to achieve, for example: In step 21 above, the vehicle headend receiver obtains its own current real-time clock signal as the primary time source. It then reads the unique hardware serial number set at the factory as the identification source. The real-time clock signal is then converted into binary data of a specific byte length and concatenated with the binary data of the device serial number at the byte level to form a continuous raw data block. A secure hash digest is then calculated on this raw data block. Through multiple rounds of grouping, character replacement, and logical operations, a fixed-length hash value is generated. This hash value serves as the dynamic encryption key.

[0030] In the above step 22, according to the protocol specification of the identity authentication instruction, a payload field for carrying the key in the protocol is determined; the dynamic encryption key is embedded into the payload field in the format and sequence required by the protocol, thereby constructing a complete encrypted verification instruction frame, which includes necessary components such as a frame header, an instruction type, a payload, and a frame footer; the entire encrypted verification instruction frame is encrypted at the channel layer using the Advanced Encryption Standard algorithm, first dividing the instruction frame into data segments of fixed length, and then performing multiple rounds of encryption transformation operations on each data segment to generate an encrypted transmission data block, which is sent to the trailer repeater via the established point-to-point wireless communication link.

[0031] In the above step 23, after the trailer repeater receives the encrypted transmission data block, it uses the corresponding decryption algorithm to decrypt it and restore the complete identity authentication instruction frame; parses the protocol payload field of the instruction frame and extracts the dynamic encryption key as the verification object; traverses all entries in the legal head device registry stored locally on the trailer repeater, compares the feature information contained in each entry with the extracted dynamic encryption key one by one, and counts the ratio of the number of matching bytes between the two to the total byte length, thereby generating the corresponding matching score for each entry; when the matching score of an entry reaches the preset security threshold, the trailer repeater generates a verification pass flag.

[0032] In step 24 above, after the trailer repeater receives the verification pass flag, it reads the pre-stored trailer tire pressure sensor ID set from its own non-volatile memory and uses it as the original data set. Data enhancement operations are performed on the original data set: on the one hand, a corresponding physical tire position code is attached to each sensor ID based on the actual installation position of the trailer tire (such as the axle, left or right). On the other hand, for each "sensor ID-physical tire position code" combination, a cyclic redundancy check algorithm is used to calculate and generate the corresponding cyclic redundancy check code, thereby forming an enhanced data set. Finally, according to the data frame structure rules specified by the vehicle bus communication protocol (including the arrangement of the frame header, data length, data field, check bit, etc.), the enhanced data set is integrated and packaged into a structured data packet.

[0033] In a preferred embodiment of the present invention, step 3 above verifies and parses the structured data packet to extract the trailer tire pressure sensor ID set; converts the ID set into a trailer tire ID-position mapping table; and simultaneously converts the local vehicle head ID set into a vehicle head tire ID-position mapping table; performs database association and merging on the trailer tire ID-position mapping table and the vehicle head tire ID-position mapping table to generate a global tire database containing binding relationships between tire position identifiers and sensor IDs for all vehicles, including: Step 31: The vehicle head receiver performs integrity check on the structured data packet, including: extracting the check code field in the structured data packet; recalculating the check value of the structured data packet payload; when the recalculated check value is consistent with the extracted check code field, determining that the data packet is a valid data packet; Step 32: Based on the valid data packet, disassemble the data packet according to a preset data structure rule to obtain a field set; extract the trailer tire pressure sensor ID and its bound tire location identifier from the field set; and generate a trailer tire ID-location mapping table using the extracted ID and location identifier as input; Step 33: Based on the valid data packet, read the vehicle tire pressure sensor ID set stored locally in the vehicle receiver, and convert the ID set into a vehicle tire ID-position mapping table; Step 34: Perform a union operation on the trailer tire ID-position mapping table and the vehicle tire ID-position mapping table; when duplicate IDs exist for the same position identifier, the ID record in the trailer mapping table is retained first; and a global mapping table containing all tire position identifiers and corresponding sensor IDs is generated; Step 35 : constructing a global tire database based on the global mapping table, sequentially assigning a unique database index to each sensor ID, and establishing a bidirectional binding relationship between the location identifier and the index number.

[0034] In the embodiment of the present application, through integrity checking, data packet damage caused by interference, tampering, etc. in the transmission process is found in time, ensuring that only complete and accurate data packets enter the subsequent processing flow, providing a guarantee for the reliability of data analysis; the original data packet is disassembled and a mapping table is generated, making the correspondence between the trailer sensor ID and the tire position intuitive and structured, facilitating subsequent integration and processing with the tractor data, and improving data processing efficiency; the presentation form of the tractor and trailer data is unified, creating compatible conditions for their merging operation; through set operation and conflict processing, complete integration of the tractor and trailer tire data is realized, ensuring the comprehensiveness of the data and solving the possible repetition conflict problem, providing complete and consistent basic data for the construction of the global database; a unique index is allocated to the sensor ID and a bidirectional binding relationship is established, greatly improving the retrieval efficiency of the database, facilitating subsequent quick query of the tire position corresponding sensor information or the sensor ID corresponding tire position, and providing data support for display screen dynamic layout and other operations.

[0035] In the embodiment of the present application, when specifically applied, the following technical solutions can be used to achieve the above-mentioned technical effects, for example: After the structured data packet is received by the tractor receiver, the specific field (such as the fixed length area at the end of the data packet) for storing the check code in the data packet is identified, and the check code is extracted therefrom; the payload part (including sensor ID, position identifier, etc. key information) of the data packet except the check code is determined, and the check value calculation is performed again according to the same rule (such as the cyclic redundancy check method) as when the trailer repeater generates the check code; finally, the recalculated check value is compared with the extracted check code, and if they are exactly the same, it is determined that the structured data packet is a valid data packet.

[0036] For the valid data packet passed through the check, the data packet is disassembled into multiple independent fields according to the preset data structure rule (such as the length, order, separator, etc. of the field), forming a field set; the trailer tire pressure sensor ID field and the tire position identifier field (such as specific position information such as “trailer 1 axle left” and “trailer 2 axle right”) associated therewith are screened from the field set, and the tire position corresponding to each sensor ID is determined. Then, taking the sensor ID as the row index and the tire position identifier as the corresponding content, a table clearly recording the correspondence between them is generated, i.e. the trailer tire ID-position mapping table.

[0037] In step 33, while processing valid data packets, the vehicle receiver reads a pre-stored set of vehicle tire pressure sensor IDs (6-10) from a local storage unit (e.g., internal memory). Based on the actual layout of the vehicle tires (e.g., "front axle left," "front drive axle right," etc.), each ID is matched to a corresponding fixed position identifier, establishing a one-to-one correspondence. Referring to the format of the trailer tire ID-position mapping table, a vehicle tire ID-position mapping table is generated, recording the vehicle sensor IDs and corresponding tire positions.

[0038] In step 34 above, all records in the trailer tire ID-position mapping table and the vehicle tire ID-position mapping table are aggregated and unioned, retaining all non-duplicate "sensor ID-position identifier" records. During the aggregation process, if the same position identifier corresponds to multiple sensor IDs (such as overlapping positions of special vehicle models), the ID record in the trailer mapping table is retained first according to the preset rules. After processing, a global mapping table containing all vehicle and trailer tire position identifiers and corresponding sensor IDs is generated.

[0039] In step 35 above, the vehicle head receiver assigns a unique digital index to each sensor ID in the global mapping table. This digital index can be numbered starting from 1 in a certain order, for example, the first sensor ID is assigned index 1, the second is assigned index 2, and so on. This digital index will serve as the unique identifier of the sensor ID in the global tire database, facilitating its management and query.

[0040] The vehicle head receiver associates each tire position identifier with the corresponding sensor ID index; this association is bidirectional. The corresponding sensor ID index can be quickly found through the tire position identifier, and the corresponding tire position identifier can also be quickly found through the sensor ID index. The vehicle head receiver organizes and stores these sensor IDs, digital indexes, tire location identifiers, and the associated information between them according to the storage format of the global tire database. The storage format specifies the storage structure, data type, and other information of these data in the database to ensure that the data can be read, written, and managed. After completing these operations, the global tire database is constructed.

[0041] In a preferred embodiment of the present invention, in step 4, the vehicle head receiver calls the global tire database, dynamically configures the tire ID display area layout of the display screen based on the distribution characteristics of the tire position identifiers in the global tire database, and automatically assigns each sensor ID to the display area corresponding to its mapped tire position identifier, including: Step 41, call global tire database, traverse all records to count the number of tires on the front axle, drive axle and trailer axle; input the number of tires on the front axle, drive axle and trailer axle, and calculate the display weight coefficient based on the axle type distribution; Step 42, based on the weight coefficient, divide the horizontal area of the display screen into main display areas according to the proportion of the weight of the front axle, the weight of the drive axle and the weight of the trailer axle, and assign each main display area an equal-width and equal-height rectangular sub-area corresponding to the number of tires on the corresponding axle type; Step 43, based on the layout of the rectangular sub-area, sort the database records in the order of the spatial sequence of the tire position identifier, and bind the sorted sensor ID to the rectangular sub-area of the corresponding axle type display area to generate an initial mapping table; Step 44, traverse each rectangular sub-area binding record in the initial mapping table, identify the sub-area with multiple sensor IDs as the conflict area set; Step 45, extract the receiving time stamp of all sensor IDs in each conflict area from the conflict area set; select the ID with the latest time stamp as the valid binding; move the old ID record covered to the database exception log; in response to the covered ID record, trigger a multi-level alarm prompt, including displaying a warning icon in the corresponding sub-area of the display screen and sending an exception code through the vehicle CAN bus; integrate the conflict processing result and the binding relationship of the non-conflict area to generate a final mapping table; Step 46, refresh the display screen based on the final mapping table, render the bound sensor ID and its real-time monitoring data in each rectangular sub-area; when the global tire database is updated or an alarm prompt is received, automatically trigger the following sequence of operations: Statistical tire position identifier distribution characteristics and calculate weight coefficient; Based on the weight coefficient, dynamically configure the display screen layout parameters; Perform sensor ID and display area mapping allocation to generate a new mapping table; Perform conflict detection and processing on the new mapping table, and output the updated final mapping table; Based on the updated final mapping table, start the display refresh process.

[0042] In an embodiment of the present invention, by counting the number of tires and calculating the weight coefficient, the display screen layout can be reasonably allocated according to the actual axle type distribution and the number of tires of the vehicle, so that the tire information of important axles is more prominent when displayed, thereby improving the rationality of information display; the main display area is divided according to the weight and sub-areas of equal width and height are allocated, which not only ensures that the display proportion of tire information of different axles complies with the weight setting, but also makes the information display area of ​​each tire standardized and unified, which is convenient for the driver to quickly identify and compare. Sensor IDs are sorted in spatial order and bound to each other, so that the sub-area layout on the display screen corresponds to the actual spatial position of the vehicle tires. The driver can intuitively understand the status of the tires at each position through the display screen, improving the readability and relevance of the information; timely identification of conflicting areas can avoid information confusion caused by multiple sensor IDs being displayed in the same sub-area, ensuring the accuracy of information display; conflicts are resolved by selecting valid IDs through timestamps, ensuring that the sub-area displays the latest sensor information, improving the timeliness of the data; abnormal logs and multi-level alarms can provide timely feedback on problems, facilitating the rapid handling of abnormal situations; refreshing the display content based on the final mapping table can display the latest tire information in real time; when the database is updated or an alarm is issued, a series of update operations are automatically triggered, so that the display screen can dynamically adapt to vehicle configuration and data changes, ensuring the real-time and accuracy of the displayed content.

[0043] In the embodiments of the present invention, when applied specifically, it can be achieved through the following technical solutions, for example: In step 41 above, the vehicle receiver calls the global tire database, checks all records in the database one by one, distinguishes the tires corresponding to the vehicle steering axle, drive axle and trailer load-bearing axle, and counts the number of tires for each of these three types of axles; according to the distribution of axle types (for example, the steering axle is more important to driving safety), a basic weight ratio is set for each axle type, and then combined with the number of tires, the display weight coefficient corresponding to each type of axle is calculated through proportional conversion to ensure that the weight coefficient can reflect the priority and proportion of different axles in the display.

[0044] In step 42 above, based on the weight coefficient, the horizontal area of ​​the display screen is regarded as a whole, and is divided according to the ratio of the weight of the front steering axis, the weight of the drive axis, and the weight of the trailer load-bearing axis to obtain three main display areas, each of which corresponds to an axle type; according to the number of tires of the axle type corresponding to each main display area, an equal number of rectangular sub-areas are divided within the main display area, and the width and height of all sub-areas are consistent to ensure that each tire has an independent and uniform display space.

[0045] In step 43, based on the determined rectangular sub-area layout, tire position identifiers are extracted from the global tire database, and the database records corresponding to these identifiers are sorted according to the actual spatial distribution order of the vehicle (e.g., from front to rear, from left to right). The sorted sensor IDs are sequentially bound to the rectangular sub-areas of the corresponding axle type display area, i.e., the first ID is bound to the first sub-area of ​​the axle type display area, the second ID is bound to the second sub-area, and so on, to generate an initial mapping table to clearly identify the sensor ID corresponding to each sub-area.

[0046] In step 44 , the binding records of each rectangular sub-region in the initial mapping table are traversed to check whether a sub-region is bound to multiple sensor IDs. If such a sub-region exists, it is identified as a conflicting region, and all conflicting regions together constitute a conflicting region set.

[0047] In step 45 above, for each conflicting area in the conflicting area set, the reception timestamps of all sensor IDs in the area are extracted from the database; these timestamps are compared, and the sensor ID with the latest time is selected as the valid binding ID for the sub-area, overwriting other old IDs; the overwritten old ID records are transferred to the exception log of the database; and at the same time, due to the existence of the overwritten ID records, a multi-level alarm prompt is triggered: a warning icon is displayed in the corresponding sub-area of ​​the display screen to alert the driver; an exception code is sent via the on-board CAN bus to facilitate vehicle fault recording and diagnosis; and the valid binding relationship determined after conflict resolution is integrated with the binding relationship of the non-conflicting area to generate a final mapping table.

[0048] In step 46, the display screen is refreshed based on the final mapping table, displaying the bound sensor ID and data such as the tire pressure monitored in real time by the sensor in each rectangular sub-area. When the global tire database is updated (e.g., a new sensor is added or replaced) or an alarm is received, the following sequence of operations are automatically performed: the distribution characteristics of the tire location identifiers are recalculated and new weight coefficients are calculated; the layout parameters of the display screen (e.g., the proportion of the main display area and the number of sub-areas) are dynamically adjusted based on the new weight coefficients; the mapping between sensor IDs and display areas is re-executed to generate a new mapping table; conflict detection and resolution are performed on the new mapping table to obtain an updated final mapping table; and the display screen is refreshed based on the updated final mapping table to ensure that the displayed content is consistent with the latest data and layout.

[0049] like Figure 2 As shown, an embodiment of the present invention also provides a commercial vehicle trailer TPMS sensor ID automatic identification system, including: Establish a module for the vehicle head receiver to establish a point-to-point wireless communication link with the trailer repeater via the low-power Bluetooth protocol; The structured module is configured to generate a dynamic encryption key and embed identity authentication instructions by the head receiver based on a point-to-point wireless communication link, and transmit the key to the trailer repeater through an encrypted channel; the trailer repeater extracts the key and performs a similarity matching calculation with a local legal head register; when the matching degree reaches a safety threshold, the trailer repeater reads a sensor ID set and encapsulates the set as a structured data packet; The mapping module is configured to check and analyze the structured data packet, extract a trailer tire pressure sensor ID set, convert the ID set into a trailer tire ID-position mapping table, convert a local head ID set into a head tire ID-position mapping table, and perform a database join of the trailer tire ID-position mapping table and the head tire ID-position mapping table to generate a global tire database containing a binding relationship between a tire position identifier and a sensor ID. The dynamic configuration module is configured to call the global tire database by the head receiver, dynamically configure a tire ID display area layout of a display screen according to a distribution characteristic of a tire position identifier in the global tire database, and automatically assign each sensor ID to a display area corresponding to a tire position identifier mapped by the sensor ID.

[0050] It should be noted that the system corresponds to the method described above, and all implementation manners in the method embodiment are applicable to this embodiment and can achieve the same technical effects.

[0051] The above is a preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered within the scope of protection of the present application.

Claims

1. The commercial vehicle trailer TPMS sensor ID automatic identification method is characterized by: The method comprises: Step 1: The vehicle receiver establishes a point-to-point wireless communication link with the trailer repeater via the Bluetooth low energy protocol; Step 2: Based on the point-to-point wireless communication link, the vehicle receiver generates a dynamic encryption key and embeds the authentication instruction, which is then sent to the trailer repeater via an encrypted channel. The trailer repeater extracts the key and performs a similarity match calculation with the local legitimate vehicle registry. When the match reaches a security threshold, the trailer repeater reads the sensor ID set and encapsulates it into a structured data packet. Step 3: Verify and parse the structured data packet to extract the trailer tire pressure sensor ID set; convert the ID set into a trailer tire ID-position mapping table; simultaneously convert the local vehicle head ID set into a vehicle head tire ID-position mapping table; perform database association and merge on the trailer tire ID-position mapping table and the vehicle head tire ID-position mapping table to generate a global tire database containing the binding relationship between the tire position identifiers and sensor IDs of all vehicles; In step 4, the vehicle head receiver calls the global tire database, dynamically configures the tire ID display area layout of the display screen according to the distribution characteristics of the tire position identifiers in the global tire database, and automatically assigns each sensor ID to the display area corresponding to its mapped tire position identifier.

2. The commercial vehicle trailer TPMS sensor ID automatic identification method according to claim 1 is characterized in that: Step 1: The vehicle receiver establishes a point-to-point wireless communication link with the trailer repeater via the Bluetooth Low Energy protocol, including: The vehicle's receiver starts scanning for low-power Bluetooth broadcasts, periodically capturing broadcast data packets from repeaters within the communication range and extracting the device type identifier from the data packets. Performing binary similarity calculation on the device type identifier and a preset trailer repeater code library, and selecting a set of candidate devices whose matching degree exceeds a dynamic threshold according to the calculation result as a primary screening result; Based on the primary screening results, the received signal strength value of each device is measured; a stability index is generated by performing compensation calculation based on the signal attenuation characteristics; and a set of devices with an index greater than a stability threshold is selected as a secondary screening result; sorting the secondary screening results in descending order of stability index, selecting the highest-order device as the target repeater, and sending a connection request containing encrypted session parameters to the target repeater; Receive the encrypted response data packet returned by the target repeater, extract the identity confirmation code after decryption, perform consistency verification with the pre-stored trailer equipment feature code, and establish a point-to-point wireless communication link after the verification passes.

3. The commercial vehicle trailer TPMS sensor ID automatic identification method according to claim 2, characterized in that: Step 2: Based on the point-to-point wireless communication link, the vehicle head receiver generates a dynamic encryption key and embeds the authentication instruction, which is then sent to the trailer repeater via an encrypted channel. This includes: Based on a point-to-point wireless communication link, a real-time clock signal of a vehicle head receiver is obtained as a first time source, and a unique serial number of the device is read as an identification source; the first time source and the identification source are byte-wise concatenated to generate an original data block; a secure hash digest is calculated on the original data block to generate a fixed-length dynamic encryption key; The dynamic encryption key is embedded in the protocol payload field of the identity authentication instruction to construct an encrypted authentication instruction frame; the instruction frame is encrypted at the channel layer using the Advanced Encryption Standard algorithm to generate an encrypted transmission data block, which is transmitted to the trailer repeater.

4. The commercial vehicle trailer TPMS sensor ID automatic identification method according to claim 3 is characterized in that: The trailer repeater extracts the key and performs similarity matching calculation with the local legal vehicle head registry; When the matching degree reaches the safety threshold, the trailer repeater reads the sensor ID set and encapsulates it into a structured data packet, including: Based on the instructions received by the trailer repeater, the protocol payload field of the received instructions is parsed and the dynamic encryption key is extracted as the verification object; using the verification object as input, the legitimate head unit device registry entries stored on the local end are traversed and a similarity matching calculation is performed to generate a matching score for each entry; when the matching score of an entry reaches a preset security threshold, a verification pass flag is generated; In response to a verification pass flag, a set of trailer tire pressure sensor IDs is read from a non-volatile memory as an original data set; a data enhancement operation is performed on the original data set to generate an enhanced data set, namely, a corresponding physical tire position code is appended to each sensor ID and a cyclic redundancy check code is generated for each ID-position combination; and the enhanced data set is used as input, and an encapsulation calculation is performed according to the data frame structure rules of the vehicle bus communication protocol to generate a structured data packet.

5. The commercial vehicle trailer TPMS sensor ID automatic identification method according to claim 4 is characterized in that: Step 3: Verify and parse the structured data packet to extract the trailer tire pressure sensor ID set; convert the ID set into a trailer tire ID-position mapping table; and simultaneously convert the local vehicle head ID set into a vehicle head tire ID-position mapping table; perform database association and merge on the trailer tire ID-position mapping table and the vehicle head tire ID-position mapping table to generate a global tire database containing the binding relationship between all vehicle tire position identifiers and sensor IDs, including: The vehicle head receiver performs integrity check on the structured data packet, including: extracting the check code field in the structured data packet; recalculating the check value of the structured data packet payload; when the recalculated check value is consistent with the extracted check code field, determining that the data packet is a valid data packet; Based on the valid data packet, disassemble the data packet according to a preset data structure rule to obtain a field set; extract the trailer tire pressure sensor ID and its bound tire location identifier from the field set; and generate a trailer tire ID-location mapping table using the extracted ID and location identifier as input; Based on the valid data packet, read the head tire pressure sensor ID set stored locally in the head receiver, and convert the ID set into a head tire ID-position mapping table; Perform a union operation on the trailer tire ID-position mapping table and the vehicle tire ID-position mapping table; when duplicate IDs exist for the same position identifier, the ID record in the trailer mapping table is retained first; and a global mapping table containing all tire position identifiers and corresponding sensor IDs is generated; A global tire database is constructed based on the global mapping table, and a unique database index is assigned to each sensor ID in sequence, and a bidirectional binding relationship is established between the location identifier and the index number.

6. The commercial vehicle trailer TPMS sensor ID automatic identification method according to claim 5, characterized in that: Step 4: The vehicle head receiver calls the global tire database, dynamically configures the tire ID display area layout of the display screen based on the distribution characteristics of the tire position identifiers in the global tire database, and automatically assigns each sensor ID to the display area corresponding to its mapped tire position identifier, including: Calling the global tire database, traversing all records to count the number of tires on the vehicle's steering axle, drive axle, and trailer's load-bearing axle; using the counted number as input, calculating and displaying weight coefficients based on axle type distribution; Based on the weight coefficients, the horizontal area of ​​the display screen is divided into main display areas according to the proportion of the weight of the vehicle's steering axis, the weight of the driving axis, and the weight of the trailer's load-bearing axis, and each main display area is allocated a rectangular sub-area of ​​equal width and height equal to the number of tires of the corresponding axle type; Based on the rectangular sub-area layout, the database records are sorted according to the spatial order of the tire position identifiers, and the sorted sensor IDs are sequentially bound to the rectangular sub-areas of the corresponding axle type display areas to generate an initial mapping table; Traverse each rectangular sub-region binding record in the initial mapping table and identify the sub-regions with multiple sensor IDs as conflicting region sets; Extract the reception timestamps of all sensor IDs in each conflicting area of ​​the conflicting area set; select the ID with the latest timestamp as the valid binding; move the old ID record to be overwritten into the database exception log; trigger a multi-level alarm prompt in response to the overwritten ID record, including displaying a warning icon in the corresponding sub-area of ​​the display screen and sending an exception code through the vehicle CAN bus; integrate the conflict handling results with the binding relationship of the non-conflicting area to generate a final mapping table.

7. The commercial vehicle trailer TPMS sensor ID automatic identification method according to claim 6, characterized in that: Step 4: The vehicle head receiver calls the global tire database, dynamically configures the tire ID display area layout of the display screen based on the distribution characteristics of the tire position identifiers in the global tire database, and automatically assigns each sensor ID to the display area corresponding to its mapped tire position identifier. The process also includes: The display is refreshed based on the final mapping table, rendering the bound sensor ID and its real-time monitoring data in each rectangular sub-area. When the global tire database is updated or an alarm is received, the following sequence of operations is automatically triggered: Count the tire position identification distribution characteristics and calculate the weight coefficient; Dynamically configure display layout parameters based on weight coefficients; Execute sensor ID and display area mapping assignment to generate a new mapping table; Perform conflict detection and processing on the new mapping table and output the updated final mapping table; Initiate the display refresh process based on the updated final mapping table.

8. A commercial vehicle trailer TPMS sensor ID automatic identification system, the system implementing the method according to any one of claims 1 to 7, characterized in that: include: Establish a module for the vehicle head receiver to establish a point-to-point wireless communication link with the trailer repeater via the low-power Bluetooth protocol; A structured module is used for generating dynamic encryption keys and embedding authentication instructions in the head receiver based on a point-to-point wireless communication link, and sending the keys to the trailer repeater through an encrypted channel; The trailer repeater extracts the key and performs similarity matching calculation with the local legal vehicle head registry; When the matching degree reaches the safety threshold, the trailer repeater reads the sensor ID set and encapsulates it into a structured data packet; A mapping module is configured to verify and parse the structured data packet, extract the trailer tire pressure sensor ID set, convert the ID set into a trailer tire ID-position mapping table, and simultaneously convert the local vehicle head ID set into a vehicle head tire ID-position mapping table. The trailer tire ID-position mapping table is then combined with the vehicle head tire ID-position mapping table to generate a global tire database containing the binding relationships between all vehicle tire position identifiers and sensor IDs. The dynamic configuration module is used for the head-mounted receiver to call the global tire database, dynamically configure the tire ID display area layout of the display screen according to the distribution characteristics of the tire position identifiers in the global tire database, and automatically assign each sensor ID to the display area corresponding to its mapped tire position identifier.

9. A computing device, characterized in that include: one or more processors; A storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a program, which, when executed by a processor, implements the method according to any one of claims 1 to 7.

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