Commercial vehicle tire pressure monitoring wireless relay method, system, equipment and medium

Abstract

The invention discloses a wireless relay method, system and equipment for commercial vehicle tire pressure monitoring and a medium, relates to the technical field of commercial vehicle tire pressure monitoring, and solves the problems of poor system adaptability and unreliable real-time alarm caused by the fact that existing commercial vehicle tire pressure monitoring needs trailer transformation and wireless transmission is easy to conflict. The method specifically comprises the steps that ACL connection is established between a tire pressure receiving node and a wireless relay node, and channel scheduling parameters and tire pressure sensor working parameters are issued to the wireless relay node; the wireless relay node sends a report request message to the tire pressure sensor on a specified channel according to a preset period; after each tire pressure sensor receives the message, reporting tire pressure monitoring data in the exclusive response time slot, and if the tire pressure sensor detects a tire burst early warning event, repeatedly reporting the tire pressure monitoring data in the tire burst reporting time slot; the wireless relay node packages the data and sends the data to a tire pressure receiving node for receiving and processing, and if it is judged that a tire burst early warning event exists, an alarm is given within 100 ms. The method is used for monitoring the tire pressure of the commercial vehicle.

Description

Technical Field

[0001] This invention relates to the field of tire pressure monitoring technology for commercial vehicles, specifically to a wireless relay method, system, device, and medium for tire pressure monitoring of commercial vehicles. Background Technology

[0002] In the field of tire pressure monitoring systems for commercial vehicles, such as Figure 1 As shown, the system primarily uses tire pressure sensors mounted on the wheel rims to sample tire pressure and temperature information in real time. This data is then transmitted wirelessly via a 433MHz frequency to tire pressure receivers installed on the chassis of vehicles such as trailers, special vehicles, hazardous materials transport vehicles, and engineering vehicles. After receiving this information, the tire pressure receivers transmit it to the body controller via the CAN network.

[0003] However, in practical applications, with the increasing complexity of commercial vehicle application scenarios and the rising technical requirements, existing technologies still have some problems: First, for the common trailer or tractor mode of commercial vehicles, the CAN solution requires the trailer to have CAN communication lines and power supply, which leads to the need for customized modifications to the trailer or tractor, resulting in weak adaptability. Second, the traditional 433MHz wireless transmission rate is relatively low, generally 125Kbit / s, while commercial vehicles have a large number of tires, usually 10 to 12. 433MHz uses unidirectional transmission and lacks a unified scheduling channel for nodes, which easily leads to data reporting conflicts, serious data loss, poor reliability and real-time performance, making it difficult to meet the 100ms real-time alarm requirement for tire blowouts in commercial vehicles. Summary of the Invention

[0004] To address the problems of poor system adaptability and unreliable real-time alarms caused by the need for trailer modification and susceptibility to wireless transmission conflicts in existing commercial vehicle tire pressure monitoring technologies, this invention provides a wireless relay method, system, device, and medium for commercial vehicle tire pressure monitoring. The technical solution is as follows:

[0005] According to a first aspect of the present invention, a wireless relay method for tire pressure monitoring in commercial vehicles is provided, comprising the following steps:

[0006] The tire pressure receiving node establishes an ACL connection with at least one wireless relay node and sends channel scheduling parameters and tire pressure sensor operating parameters to the wireless relay node.

[0007] The wireless relay node sends reporting request messages to multiple tire pressure sensors on a designated channel at a preset period according to the channel scheduling parameters.

[0008] After receiving the reporting request message, each tire pressure sensor reports tire pressure monitoring data to the wireless relay node in a connectionless manner within its dedicated response time slot. If the tire pressure sensor detects a blowout warning event, it repeatedly reports the blowout data within the blowout reporting time slot allocated for the blowout event. The blowout warning event includes an impending blowout or a blowout event.

[0009] The wireless relay node packages the data from multiple tire pressure sensors received within a cycle and sends it to the tire pressure receiving node via an ACL connection during the summary reporting time slot.

[0010] The tire pressure receiving node receives and processes the data, and if it determines that a tire blowout warning event has occurred, it issues an alarm within 100ms.

[0011] The present invention provides a wireless relay method for tire pressure monitoring in commercial vehicles. A tire pressure receiving node establishes an ACL connection with at least one wireless relay node and sends channel scheduling parameters and tire pressure sensor operating parameters to the wireless relay node. According to the channel scheduling parameters, the wireless relay node sends reporting request messages to multiple tire pressure sensors on a designated channel at a preset period. Upon receiving the reporting request message, each tire pressure sensor reports tire pressure monitoring data to the wireless relay node in a connectionless manner within its assigned dedicated response time slot. If a tire pressure sensor detects a blowout warning event, it repeatedly reports blowout data within the blowout reporting time slot allocated for the blowout event. Blowout warning events include impending blowout or a blowout event. The wireless relay node packages the data received from multiple tire pressure sensors within one period and sends it to the tire pressure receiving node via the ACL connection within a summary reporting time slot. The tire pressure receiving node receives and processes the data; if a blowout warning event is detected, it issues an alarm within 100ms. The method of this invention introduces a wireless relay architecture centrally scheduled by tire pressure receiving nodes and adopts a time-slot reporting and tire blowout data duplication reporting mechanism. This solves the problems of poor adaptability of traditional solutions due to the need for customized modification of trailers and unreliable real-time alarms due to wireless transmission conflicts. Thus, without the need to lay cables, it ensures that commercial vehicle tire blowout events can be reliably detected and alarmed within 100ms.

[0012] As a further aspect of the present invention: the preset period is 50ms, and is divided into a reporting request stage, a normal reporting stage, a tire blowout reporting stage, and a summary reporting stage.

[0013] The method of this invention establishes a strict timing order by precisely defining the communication period as 50ms and dividing it into four distinct stages, and allocating a dedicated response time slot to each sensor. This effectively avoids data conflicts between multiple nodes and ensures the real-time and deterministic nature of data reporting.

[0014] As a further aspect of the present invention: the tire pressure sensor dynamically adjusts its actual reporting frequency according to the issued tire pressure sensor operating parameters, with a maximum reporting cycle of 12.5 seconds.

[0015] The method of this invention enables on-demand communication by dynamically adjusting the reporting frequency of the tire pressure sensor under a centralized scheduling framework. This allows the sensor to operate in a very low power consumption mode in non-emergency situations, thereby significantly reducing power consumption and extending battery life while ensuring real-time reporting of emergencies such as tire blowouts.

[0016] As a further aspect of the present invention: the step of sending channel scheduling parameters to the wireless relay node includes:

[0017] Different working channels are assigned to the tire pressure receiving node and each wireless relay node;

[0018] The channels allocated to any two wireless relay nodes must be spaced at least two channels apart.

[0019] The method of this invention achieves signal isolation in the frequency domain by allocating specific channels to different nodes and setting a minimum channel interval between relay nodes, effectively avoiding co-channel interference between different relay nodes, and further improving the success rate and reliability of data transmission in complex multi-relay scenarios.

[0020] As a further aspect of the present invention: the reporting request message is sent repeatedly once, and if no response is received in the summary reporting step within a preset time, the message is retransmitted.

[0021] The method of this invention introduces a message duplication and retransmission mechanism in key communication links (such as request and summary reporting), which provides redundancy protection for instruction transmission and key data upload, and can effectively resist the random data packet loss in the complex electromagnetic environment of vehicles, thereby significantly improving the robustness of communication.

[0022] As a further aspect of the present invention: the tire pressure sensor communicates with the wireless relay node using the connectionless BLE 1M protocol with acknowledgment, and the wireless relay node communicates with the tire pressure receiving node using the connection-oriented ACL BLE 1M protocol.

[0023] The method of this invention comprehensively utilizes two communication modes in the BLE protocol: connectionless with acknowledgment and connection-oriented ACL. It selects the optimal link type for the access of tire pressure sensors and tire pressure wireless relays, and for the reliable data transmission of tire pressure wireless relays and tire pressure receiving nodes. While ensuring low power consumption and flexibility, it lays the protocol foundation for high-reliability communication.

[0024] As a further aspect of the present invention: the reporting and transmission process of the tire pressure monitoring data uses a serial number field and is encrypted using the security capabilities of the BLE protocol; the tire pressure monitoring data includes at least the tire pressure and temperature.

[0025] The method of this invention provides encryption and anti-replay attack protection for the transmitted tire pressure data by introducing a serial number and combining it with the security mechanism built into the BLE protocol, ensuring the confidentiality and integrity of the monitoring data, effectively preventing the data from being eavesdropped or maliciously tampered with, and improving security.

[0026] According to a second aspect of the present invention, a wireless relay system for tire pressure monitoring in commercial vehicles is provided, the system comprising:

[0027] The tire pressure receiving node is connected to at least one wireless relay node ACL. It is used to send channel scheduling parameters and tire pressure sensor operating parameters to perform central scheduling, receive and process packet data from the wireless relay node, and issue an alarm within 100ms if a tire blowout warning event is detected.

[0028] At least one wireless relay node, powered by a lithium battery or solar energy, is used to send a reporting request message on a designated channel at a preset period according to the channel scheduling parameters, receive tire pressure monitoring data reported by multiple tire pressure sensors in a dedicated response time slot, and package the received data and send it to the tire pressure receiving node in the summary reporting time slot through an ACL connection.

[0029] Multiple tire pressure sensors are used to report tire pressure monitoring data to the wireless relay node within their respective dedicated response time slots after receiving the reporting request message, and to repeatedly report tire blowout data within the tire blowout reporting time slot when a tire blowout warning event is detected, wherein the tire blowout warning event includes an impending tire blowout or a tire blowout event.

[0030] The commercial vehicle tire pressure monitoring wireless relay system provided by this invention includes: a tire pressure receiving node, connected to at least one wireless relay node ACL, used to send channel scheduling parameters and tire pressure sensor operating parameters to execute central scheduling, receive and process packaged data from the wireless relay node, and issue an alarm within 100ms if a tire blowout warning event is detected; at least one wireless relay node, powered by a lithium battery or solar energy, used to send reporting request messages on a designated channel at a preset period according to the channel scheduling parameters, receive tire pressure monitoring data reported by multiple tire pressure sensors in their dedicated response time slots, package the received data, and send it to the tire pressure receiving node in the summary reporting time slot through the ACL connection; multiple tire pressure sensors, used to report tire pressure monitoring data to the wireless relay node in their respective dedicated response time slots after receiving the reporting request message, and to repeatedly report tire blowout data in the tire blowout reporting time slot when a tire blowout warning event is detected, wherein the tire blowout warning event includes an impending tire blowout or a tire blowout event. This invention's system eliminates the reliance on trailer CAN lines and power supplies by using wireless relay nodes powered by lithium batteries or solar energy, achieving convenient installation and strong adaptability. Simultaneously, by employing BLE technology and centrally scheduling the tire pressure receiving nodes, dedicated reporting time slots are allocated to numerous tire pressure sensors, completely resolving the data conflict and loss issues caused by disordered competition in traditional 433MHz solutions. This ensures high system reliability and meets the stringent requirement of real-time alarm within 100ms for commercial vehicle tire blowouts.

[0031] According to a third aspect of the present invention, a commercial vehicle tire pressure monitoring wireless relay device is provided, the commercial vehicle tire pressure monitoring wireless relay device including a processor and a memory, the memory storing at least one computer instruction, the instruction being loaded and executed by the processor to perform the steps performed in the commercial vehicle tire pressure monitoring wireless relay method described above.

[0032] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, the storage medium storing at least one computer instruction, the instruction being loaded and executed by a processor to perform the steps performed in the commercial vehicle tire pressure monitoring wireless relay method described in any of the preceding claims.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0035] Figure 1 This is a schematic diagram of the structure of a commercial vehicle tire pressure monitoring system in the prior art;

[0036] Figure 2 This is a schematic diagram of the system corresponding to the wireless relay method for tire pressure monitoring of commercial vehicles provided in this embodiment of the invention;

[0037] Figure 3 This is a flowchart of the wireless relay method for tire pressure monitoring in commercial vehicles provided in an embodiment of the present invention;

[0038] Figure 4 This is a service sequence diagram of a single-cycle 50ms wireless relay carrying four tire pressure sensors provided in an embodiment of the present invention;

[0039] Figure 5 This is a diagram illustrating the transmission format of a request message between a tire pressure sensor and a wireless relay, provided in an embodiment of the present invention.

[0040] Figure 6 This is a diagram illustrating the transmission format of the response message between the tire pressure sensor and the wireless relay provided in an embodiment of the present invention.

[0041] Figure 7 This is a diagram illustrating the transmission format of the reporting message between the wireless relay and the tire pressure receiving node, as provided in an embodiment of the present invention.

[0042] Figure 8 This is a diagram illustrating the transmission format of the reporting response between the wireless relay and the tire pressure receiving node provided in this embodiment of the invention.

[0043] Figure 9 This is a schematic diagram of the structure of the commercial vehicle tire pressure monitoring wireless relay system provided in an embodiment of the present invention. Detailed Implementation

[0044] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0045] This invention provides a wireless relay method for tire pressure monitoring in commercial vehicles. Figure 2 The diagram illustrates an exemplary system architecture for applying the method described in this invention. This architecture includes a BLE receiver node and a body control module (BCM) located at the front of the vehicle, and at least one BLE tire pressure monitoring wireless relay located on the trailer, along with multiple BLE tire pressure sensors connected to each BLE tire pressure monitoring wireless relay. Figure 3 The flowchart of the commercial vehicle tire pressure monitoring wireless relay method of the present invention includes the following steps:

[0046] Step 101: The tire pressure receiving node establishes an ACL connection with at least one wireless relay node and sends channel scheduling parameters and tire pressure sensor operating parameters to the wireless relay node.

[0047] In this embodiment, the wireless relay node is powered by a lithium battery or solar energy and can be easily installed on the trailer of a commercial vehicle.

[0048] In one embodiment, the step of sending channel scheduling parameters to a wireless relay node includes:

[0049] Different working channels are assigned to the tire pressure receiving node and each wireless relay node;

[0050] The channels allocated to any two wireless relay nodes must be spaced at least two channels apart.

[0051] In practical use, the channel allocation principles include: ensuring no conflict between tire pressure receiving nodes and wireless relay nodes; a minimum difference of 2 channels between two wireless relay channels; and even coverage of high, medium, and low frequency channels for each node. Specifically, the channel reference sequence is constructed based on the above principles as shown in the table below:

[0052] node Channel Remark Tire pressure reception 1、5、7、9、12、15、25、29、35 Wireless Repeater 1 2、4、11、14、18、20、21、36 Wireless Repeater 2 6、8、13、16、22、24、27、32、34

[0053] The method of this invention achieves signal isolation in the frequency domain by allocating specific channels to different nodes and setting a minimum channel interval between relay nodes, effectively avoiding co-channel interference between different relay nodes, and further improving the success rate and reliability of data transmission in complex multi-relay scenarios.

[0054] Step 102: The wireless relay node sends a reporting request message to multiple tire pressure sensors on the designated channel at a preset period according to the channel scheduling parameters.

[0055] In one embodiment, the preset period is 50ms and is divided into a reporting request stage, a normal reporting stage, a tire blowout reporting stage, and a summary reporting stage.

[0056] In this embodiment, the tire pressure sensor and the wireless relay node poll the sensor every 50ms, and the wireless relay node and the tire pressure receiving node also maintain connection every 50ms. The tire pressure sensor node dynamically adjusts its reporting cycle according to the service type in multiples of 50ms, thereby significantly reducing power consumption while ensuring real-time requirements. Figure 4 The diagram shows a single-cycle 50ms service sequence diagram for a relay carrying four tire pressure sensors. The tire pressure service sequence diagram is divided into four stages: wireless relay TPMS reporting request, tire pressure sensor TPMS normal reporting, tire pressure sensor TPMS tire blowout reporting (optional), and wireless relay summary reporting.

[0057] The method of this invention establishes a strict timing order by precisely defining the communication period as 50ms and dividing it into four distinct stages, and allocating a dedicated response time slot to each sensor. This effectively avoids data conflicts between multiple nodes and ensures the real-time and deterministic nature of data reporting.

[0058] In one embodiment, the reporting request message is sent repeatedly, and if the summary reporting step does not receive a response within a preset time, it is retransmitted.

[0059] In actual use, the first stage of the tire pressure monitoring service is the wireless relay TPMS reporting request. Specifically, the wireless relay sends a TPMS reporting request message once, and then repeats it once more.

[0060] The method of this invention introduces a message duplication and retransmission mechanism in key communication links (such as request and summary reporting), which provides redundancy protection for instruction transmission and key data upload, and can effectively resist the random data packet loss in the complex electromagnetic environment of vehicles, thereby significantly improving the robustness of communication.

[0061] In one embodiment, the tire pressure sensor communicates with the wireless relay node using a connectionless BLE 1M protocol with acknowledgment, while the wireless relay node communicates with the tire pressure receiving node using a connection-oriented ACL BLE 1M protocol.

[0062] In this embodiment, preferably, the tire pressure sensor and the tire pressure monitoring wireless relay node communicate using a BLE 1M mode with acknowledged connectionless communication, while the tire pressure monitoring wireless relay and the tire pressure receiving node communicate using a BLE 1M ACL connection. Alternatively, 15.4 or other bidirectional low-power wireless technologies can be used instead of BLE.

[0063] The method of this invention comprehensively utilizes two communication modes in the BLE protocol: connectionless with acknowledgment and connection-oriented ACL. It selects the optimal link type for the access of sensors and relays and for the reliable data transmission of relay and receiving nodes, respectively. While ensuring low power consumption and flexibility, it lays the protocol foundation for high-reliability communication.

[0064] Step 103: After receiving the reporting request message, each tire pressure sensor reports tire pressure monitoring data to the wireless relay node in a connectionless manner within its dedicated response time slot. If the tire pressure sensor detects a tire blowout warning event, it will repeatedly report the blowout data within the blowout reporting time slot allocated for the blowout event.

[0065] In this embodiment, the tire blowout warning event includes an impending tire blowout or a tire blowout event;

[0066] In one embodiment, the tire pressure sensor dynamically adjusts its actual reporting frequency based on the issued tire pressure sensor operating parameters, with a maximum reporting cycle of 12.5 seconds.

[0067] In actual use, the tire pressure sensor determines whether to report in the current cycle based on the business characteristics, supporting a maximum response time of once every 12.5 seconds. If the tire pressure sensor detects an impending tire blowout or a blowout locally, it will re-report the tire pressure monitoring data to prevent the loss of normal reporting information and the inability to receive tire pressure data in real time.

[0068] The method of this invention enables on-demand communication by dynamically adjusting the reporting frequency of the tire pressure sensor under a centralized scheduling framework. This allows the sensor to operate in a very low power consumption mode in non-emergency situations, thereby significantly reducing power consumption and extending battery life while ensuring real-time reporting of emergencies such as tire blowouts.

[0069] Step 104: The wireless relay node packages the data from multiple tire pressure sensors received within a cycle and sends it to the tire pressure receiving node via the ACL connection during the summary reporting time slot.

[0070] In practical use, the wireless relay node packages the data from each tire pressure sensor node and sends the packaged data to the tire pressure receiving node. If the wireless relay node does not receive an acknowledgment from the tire pressure receiving node, it will retransmit multiple times until successful transmission. Once the tire pressure receiving node successfully receives the packaged data, it will send a summary report acknowledgment signal to the wireless relay node. In this embodiment, the four stages of tire pressure scheduling occupy a total of 50ms time slots. Based on a maximum sleep offset of 100ppm and a maximum sleep time of 12.5 seconds for the tire pressure sensor terminal, the detailed allocation is as follows:

[0071]

[0072]

[0073] In one embodiment, the reporting and transmission of tire pressure monitoring data uses a serial number field and is encrypted using the security capabilities of the BLE protocol; the tire pressure monitoring data includes at least the tire pressure and temperature.

[0074] In practical applications, the transmission format of request messages between the tire pressure sensor and the wireless relay is as follows: Figure 5 As shown in the table below:

[0075]

[0076]

[0077] The transmission format of response messages (including normal reporting and tire blowout reporting) between the tire pressure sensor and the wireless relay is as follows: Figure 6 As shown in the table below:

[0078] Fields describe Number of bits ID Sensor ID 5 acceleration Does it include acceleration values? 1 reserve Reserved for future expansion 2 Serial Number Transmitting serial numbers to prevent replay attacks 8 Temperature value Tire temperature: Range -40 to 150°C, in 1.5°C increments. 7 pressure value Tire pressure: Range 0–1500 kPa, in 3 kPa increments 9 acceleration value X and Z acceleration values, representing a range of -480 to 480g, in 4g increments. 16

[0079] The transmission format of the reporting message between the wireless relay and the tire pressure receiver is as follows: Figure 7 As shown in the table below:

[0080]

[0081] The transmission format for reporting responses between the wireless relay and the tire pressure receiver is as follows: Figure 8 As shown in the table below:

[0082] Fields describe Number of bits ID Wireless repeater ID 5 reserve Reserved for future expansion 3 Serial Number Transmitting serial numbers to prevent replay attacks 8 Command type ACK response type 8

[0083] Furthermore, regarding security, this embodiment of the invention utilizes the inherent security features of the Bluetooth Low Energy (BLE) protocol to ensure the overall security of communication. Specifically, communication between the wireless relay and the tire pressure sensor employs a PAwR (Periodic Advertisement and Response) mechanism, enhancing data transmission security. Communication between the wireless relay and the tire pressure receiving node is based on a BLE ACL (Asynchronous Connectionless Link) connection, further ensuring data security and reliability through encryption and authentication.

[0084] The method of this invention provides encryption and anti-replay attack protection for the transmitted tire pressure data by introducing a serial number and combining it with the security mechanism built into the BLE protocol, ensuring the confidentiality and integrity of the monitoring data, effectively preventing the data from being eavesdropped or maliciously tampered with, and improving security.

[0085] Step 105: The tire pressure receiving node receives and processes the data. If it determines that a tire blowout warning event has occurred, it issues an alarm within 100ms.

[0086] In this embodiment, the BLE tire pressure receiving node aggregates the data from each tire pressure sensor. If it determines that there is a leak, a blowout, or other similar situation, it notifies the body control module (BCM) to take appropriate action.

[0087] The commercial vehicle tire pressure monitoring wireless relay method provided in this invention involves a tire pressure receiving node establishing an ACL connection with at least one wireless relay node and sending channel scheduling parameters and tire pressure sensor operating parameters to the wireless relay node. The wireless relay node, according to the channel scheduling parameters, sends reporting request messages to multiple tire pressure sensors on a designated channel at a preset period. Upon receiving the reporting request message, each tire pressure sensor reports tire pressure monitoring data to the wireless relay node in a connectionless manner within its assigned dedicated response time slot. If a tire pressure sensor detects a blowout warning event, it repeatedly reports blowout data within the blowout reporting time slot allocated for the blowout event. Blowout warning events include impending blowout or a blowout event. The wireless relay node packages the data received from multiple tire pressure sensors within a period and sends it to the tire pressure receiving node via the ACL connection within a summary reporting time slot. The tire pressure receiving node receives and processes the data; if a blowout warning event is detected, it issues an alarm within 100ms. The method of this invention introduces a wireless relay architecture centrally scheduled by tire pressure receiving nodes and adopts a time-slot reporting and tire blowout data duplication reporting mechanism. This solves the problems of poor adaptability of traditional solutions due to the need for customized modification of trailers and unreliable real-time alarms due to wireless transmission conflicts. Thus, without the need to lay cables, it ensures that commercial vehicle tire blowout events can be reliably detected and alarmed within 100ms.

[0088] Based on the above Figure 3 The corresponding embodiment describes a wireless relay method for tire pressure monitoring in commercial vehicles. The following is a system embodiment of the present invention, which can be used to execute the method embodiment of the present invention.

[0089] This invention provides a wireless relay system for tire pressure monitoring in commercial vehicles, such as... Figure 9 As shown, the system includes:

[0090] Tire pressure receiving node 201 is connected to at least one wireless relay node 202ACL to send channel scheduling parameters and tire pressure sensor 203 operating parameters to perform central scheduling, receive and process packet data from wireless relay node 202, and issue an alarm within 100ms if a tire blowout warning event is detected.

[0091] At least one wireless relay node 202, powered by a lithium battery or solar energy, is used to send a reporting request message on a designated channel at a preset period according to channel scheduling parameters, receive tire pressure monitoring data reported by multiple tire pressure sensors 203 in a dedicated response time slot, and package the received data and send it to the tire pressure receiving node 201 in the summary reporting time slot through the ACL connection.

[0092] Multiple tire pressure sensors 203 are used to report tire pressure monitoring data to the wireless relay node 202 within their respective dedicated response time slots after receiving a reporting request message, and to repeatedly report tire blowout data within the tire blowout reporting time slot when a tire blowout warning event is detected. The tire blowout warning event includes an impending tire blowout or a tire blowout event.

[0093] The commercial vehicle tire pressure monitoring wireless relay system provided in this embodiment of the invention includes: a tire pressure receiving node 201, connected to at least one wireless relay node 202 ACL, used to send channel scheduling parameters and tire pressure sensor 203 operating parameters to execute central scheduling, receive and process packetized data from the wireless relay node 202, and issue an alarm within 100ms if a tire blowout warning event is detected; at least one wireless relay node 202, powered by a lithium battery or solar energy, used to send reporting requests on a designated channel at a preset period according to the channel scheduling parameters. The system receives tire pressure monitoring data reported by multiple tire pressure sensors 203 within their dedicated response time slots. The received data is packaged and sent to the tire pressure receiving node 201 via an ACL connection within a summary reporting time slot. Multiple tire pressure sensors 203, upon receiving a reporting request message, report tire pressure monitoring data to the wireless relay node 202 within their respective dedicated response time slots. When an impending tire blowout warning event is detected, they repeatedly report blowout data within the blowout reporting time slot. The blowout warning event includes an impending blowout or a blowout event. This system, powered by a lithium battery or solar energy-powered wireless relay node, eliminates dependence on the trailer's CAN bus and power supply, achieving convenient installation and strong adaptability. Simultaneously, by employing BLE technology and centrally scheduling the tire pressure receiving node, dedicated reporting time slots are allocated to numerous tire pressure sensors, completely resolving the data conflict and loss problems caused by disordered competition in traditional 433MHz solutions. This ensures high system reliability and meets the stringent requirement of real-time alarm within 100ms for commercial vehicle tire blowouts.

[0094] Based on the above Figure 3 The corresponding embodiment describes a wireless relay method for tire pressure monitoring in commercial vehicles. Another embodiment of the present invention also provides a wireless relay device for tire pressure monitoring in commercial vehicles. This device includes a processor and a memory. The memory stores at least one computer instruction, which is loaded and executed by the processor to achieve the above-described functionality. Figure 3 The corresponding embodiment describes a wireless relay method for tire pressure monitoring in commercial vehicles.

[0095] Based on the above Figure 3The commercial vehicle tire pressure monitoring wireless relay method described in the corresponding embodiments of the present invention also provides a computer-readable storage medium. For example, a non-transitory computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, magnetic tape, a floppy disk, or an optical data storage system, etc. This storage medium stores at least one computer instruction for executing the above-described... Figure 3 The wireless relay method for tire pressure monitoring of commercial vehicles described in the corresponding embodiments will not be repeated here.

[0096] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0097] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A commercial vehicle tire pressure monitoring wireless relay method, characterized by, The method comprises the following steps: The tire pressure receiving node establishes an ACL connection with at least one wireless relay node, and issues channel scheduling parameters and tire pressure sensor working parameters to the wireless relay node; The wireless relay node sends a reporting request message to multiple tire pressure sensors on a designated channel according to the channel scheduling parameters and at a preset period; Each tire pressure sensor reports tire pressure monitoring data to the wireless relay node in a connectionless manner in the assigned exclusive response time slot after receiving the reporting request message, and repeatedly reports tire burst data in the tire burst reporting time slot assigned for the tire burst event if a tire burst warning event is detected, wherein the tire burst warning event includes an impending tire burst or a tire burst event; The wireless relay node packages the data received from multiple tire pressure sensors in a period and sends them to the tire pressure receiving node through the ACL connection in the summary reporting time slot; The tire pressure receiving node receives and processes the data, and issues an alarm within 100 ms if a tire burst warning event is determined.

2. The commercial vehicle tire pressure monitoring wireless repeater method of claim 1, wherein, The preset period is 50 ms and is divided into a reporting request phase, a normal reporting phase, a tire burst reporting phase, and a summary reporting phase.

3. The commercial vehicle tire pressure monitoring wireless repeater method of claim 2, wherein, The tire pressure sensor dynamically adjusts the actual reporting frequency according to the issued tire pressure sensor working parameters, and the maximum reporting period is 12.5 seconds.

4. The commercial vehicle tire pressure monitoring wireless repeater method of claim 1, wherein, The step of issuing channel scheduling parameters to the wireless relay node comprises: Different working channels are assigned to the tire pressure receiving node and each wireless relay node; The channels assigned to any two wireless relay nodes are at least 2 channels apart.

5. The commercial vehicle tire pressure monitoring wireless repeater method of claim 1, wherein, The reporting request message is sent repeatedly once, and retransmitted if no response is received within a preset time during the summary reporting step.

6. The commercial vehicle tire pressure monitoring wireless repeater method of claim 1, wherein, The tire pressure sensor and the wireless relay node communicate using the BLE 1M protocol with connectionless acknowledgement, and the wireless relay node and the tire pressure receiving node communicate using the ACL BLE 1M protocol with connection orientation.

7. The commercial vehicle tire pressure monitoring wireless repeater method of claim 1, wherein, The reporting and transmission process of the tire pressure monitoring data uses a sequence number field and is encrypted using the security capabilities of the BLE protocol; the tire pressure monitoring data at least includes the tire pressure and temperature of the tire.

8. A commercial vehicle tire pressure monitoring wireless relay system for implementing the method of any one of claims 1 to 7, characterized by The system comprises: A tire pressure receiving node in ACL connection with at least one wireless relay node, for issuing channel scheduling parameters and tire pressure sensor working parameters to perform central scheduling, receiving and processing packaged data from the wireless relay node, and issuing an alarm within 100 ms if a tire burst warning event is determined; At least one wireless relay node powered by a lithium battery or solar energy, for sending a reporting request message at a preset period on a designated channel according to the channel scheduling parameters, receiving tire pressure monitoring data reported by multiple tire pressure sensors in an exclusive response time slot, and packaging the received data and sending them to the tire pressure receiving node through the ACL connection in a summary reporting time slot; A plurality of tire pressure sensors are configured to report tire pressure monitoring data to the wireless relay node in a dedicated response time slot assigned to each tire pressure sensor upon receiving the report request message, and to repeatedly report tire burst data in a tire burst report time slot upon detecting a tire burst warning event, wherein the tire burst warning event includes an impending tire burst or a tire burst event.

9. A commercial vehicle tire pressure monitoring wireless repeater device characterized by, The commercial vehicle tire pressure monitoring wireless relay device comprises a processor and a memory, and the memory stores at least one computer instruction, which is loaded and executed by the processor to implement the steps performed in the commercial vehicle tire pressure monitoring wireless relay method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The storage medium stores at least one computer instruction, which is loaded and executed by the processor to implement the steps performed in the commercial vehicle tire pressure monitoring wireless relay method of any one of claims 1 to 7.

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