CN116149293A - A vehicle remote diagnosis method, system and computer equipment - Google Patents

Abstract

The embodiment of the present invention provides a vehicle remote diagnosis method, system and computer equipment. The method includes: creating a diagnosis task; judging whether the vehicle to be diagnosed supports the MQTT protocol; when the vehicle to be diagnosed supports the MQTT protocol, judging whether the vehicle to be diagnosed is online; If the vehicle to be diagnosed is online, send diagnostic commands to all task-related vehicles to be diagnosed through the MQTT protocol, and the vehicle to be diagnosed will obtain the diagnostic task and download the diagnostic package through the HTTPS protocol; when the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is not online , the vehicle to be diagnosed periodically pulls the diagnosis task and downloads the diagnosis package through the HTTPS protocol; the vehicle to be diagnosed performs the diagnosis task and obtains the diagnosis result; the vehicle to be diagnosed uploads the diagnosis result to the remote diagnosis platform. The communication protocol method combining MQTT protocol and HTTPS protocol is adopted, which effectively improves the execution rate and success rate of remote diagnosis in complex network environment.

Description

A vehicle remote diagnosis method, system and computer equipment

technical field

The invention relates to the technical field of automobiles, in particular to a vehicle remote diagnosis method, system and computer equipment.

Background technique

At present, vehicle fault diagnosis methods include local diagnosis through on-board equipment or portable diagnostic instrument hardware, near-field diagnosis through vehicle-vehicle interconnection information, and remote diagnosis through cloud platform. Among them, the difference between remote diagnosis technology and traditional diagnosis technology The main difference is to enable vehicle manufacturers to change from passive diagnosis to active diagnosis, which can remotely diagnose vehicles at any time or on a regular basis through the cloud platform.

The implementation of remote diagnosis mostly establishes the connection between the vehicle and the cloud platform through the Transmission Control Protocol (TCP), and the cloud platform uses an application layer protocol based on the TCP protocol, namely the Message Queuing Telemetry Transmission Transport, MQTT) pushes the diagnostic command to the vehicle in real time, and then the diagnostic module in the vehicle completes the corresponding diagnosis. However, there are many problems and defects in the diagnostic instruction-based remote diagnosis method based on the MQTT protocol: First, the integration of the software development kit (Software Development Kit, SDK) of the terminal equipment is complicated, but the terminal equipment based on various platforms needs to integrate the SDK to Realizing the MQTT function is not only difficult to integrate, but also some platforms do not support the MQTT protocol; second, it does not support files, and remote diagnosis usually needs to transmit a large number of diagnostic script files and diagnostic log files, thus limiting the application scenarios of remote diagnosis ; Third, it does not support offline messages, because the vehicle and the diagnostic cloud platform need to complete the communication link connection before realizing the diagnostic function, but the actual operating conditions of the vehicle are very complicated, and there are often connection exceptions, connection interruptions, and connection time. control and other issues, especially the problem that the vehicle cannot connect to the cloud platform due to bandwidth limitations in high-concurrency scenarios, resulting in the inability to complete remote diagnosis completely; fourth, the trigger conditions for diagnosis are uncontrollable, and the main purpose of remote diagnosis is to realize vehicle positioning and monitoring. Vehicle fault information, reading fault codes, fault alarm processing, etc., so as to realize fault diagnosis and repair. When diagnosis can only be triggered based on certain special conditions or periodic trigger diagnosis is required, the trigger conditions cannot be controlled and the vehicle and platform can be maintained for a long time. The connection will undoubtedly take up a lot of physical and network resources; fifth, batch diagnosis cannot be realized, because it needs to connect the vehicle to realize diagnosis through real-time instructions, so it cannot guarantee that a large number of vehicles to be diagnosed will be online at the same time and meet the diagnosis conditions at the same time, so It is difficult to achieve batch diagnosis.

Contents of the invention

This specification provides a vehicle remote diagnosis method, system and computer equipment to overcome at least one technical problem existing in the prior art.

In the first aspect, according to an embodiment of the present specification, a method for remote diagnosis of a vehicle is provided, including:

Create diagnostic tasks;

Determine whether the vehicle to be diagnosed supports the MQTT protocol;

When the vehicle to be diagnosed supports the MQTT protocol, determine whether the vehicle to be diagnosed is online;

If the vehicle to be diagnosed is online, send a diagnosis instruction to all the vehicles to be diagnosed associated with the task through the MQTT protocol, and the vehicle to be diagnosed obtains the diagnosis task through the HTTPS protocol, and downloads the diagnosis package;

When the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is not online, the vehicle to be diagnosed periodically pulls the diagnostic task through the HTTPS protocol, and downloads the diagnostic package;

The vehicle to be diagnosed executes the diagnosis task to obtain a diagnosis result;

The vehicle to be diagnosed uploads the diagnosis result to the remote diagnosis platform.

Optionally, the creating a diagnostic task includes:

Create diagnosis task description information through the remote diagnosis platform; the diagnosis task description information includes diagnosis task start time, diagnosis task end time, diagnosis type, diagnosis strategy, diagnosis package type, diagnosis package file, execution time interval, trigger event, Trigger delay time, task description information;

A diagnostic package is created through the remote diagnostic platform; the diagnostic package includes a diagnostic data file, an ECU list file to be diagnosed, a trigger policy file, a diagnostic script file, and a signature file.

Further optionally, the creating a diagnostic task further includes:

The diagnostic task description information is encrypted and signed to obtain the encrypted diagnostic task description information.

Still further optionally, the judging whether the vehicle to be diagnosed is online includes:

The vehicle to be diagnosed publishes a status message to the Broker server, and the Broker server determines the first target topic corresponding to the status message, and publishes the status message to the first MQTT client subscribing to the first target topic; The first MQTT client includes the vehicle to be diagnosed and the remote diagnosis platform, and the status message includes an online message and an offline message;

The remote diagnosis platform judges whether the vehicle to be diagnosed is online according to the status message.

Still further optionally, the sending the diagnosis instruction to all the vehicles to be diagnosed associated with the task through the MQTT protocol, the vehicle to be diagnosed obtains the diagnosis task through the HTTPS protocol, and downloading the diagnosis package specifically includes:

The remote diagnosis platform publishes a message to be diagnosed to the Broker server, and the Broker server determines a second target topic corresponding to the message to be diagnosed, and publishes the second target topic to subscribers of the second target topic A second MQTT client; the second MQTT client includes the vehicle to be diagnosed and the remote diagnosis platform, and the message to be diagnosed includes a diagnosis instruction;

According to the message to be diagnosed, the vehicle to be diagnosed sends the current basic information of the vehicle and a diagnosis task request to the remote diagnosis platform through the HTTPS protocol;

The remote diagnosis platform sends encrypted diagnosis task description information and diagnosis package download link information to the vehicle to be diagnosed according to the current basic information of the vehicle and the request for obtaining a diagnosis task;

The vehicle to be diagnosed receives the encrypted diagnostic task description information and the diagnostic package download link information, verifies the integrity and reliability of the message, and if the signature verification is passed, decrypts the encrypted diagnostic task description information to obtain the diagnosis Task description information, and according to the diagnostic package download link information, download the diagnostic package from the remote diagnostic platform through the HTTPS protocol.

Further optionally, the vehicle to be diagnosed periodically pulls the diagnostic task through the HTTPS protocol, and downloading the diagnostic package specifically includes:

When the vehicle to be diagnosed meets the pull task conditions, the vehicle to be diagnosed establishes remote communication with the remote diagnosis platform based on the HTTPS protocol, and sends the current basic information of the vehicle and a diagnosis task request to the remote diagnosis platform; The pulling task conditions mentioned above include that the vehicle is in IGON gear and the preset pulling time is reached;

The remote diagnosis platform extracts the diagnostic task in the database according to the current basic information of the vehicle and the request for obtaining the diagnostic task; the diagnostic task includes encrypted diagnostic task description information, diagnostic package and diagnostic package download link information;

The remote diagnosis platform sends the encrypted diagnosis task description information and the diagnosis package download link information to the vehicle to be diagnosed;

The vehicle to be diagnosed receives the encrypted diagnostic task description information and the diagnostic package download link information, verifies the integrity and reliability of the message, and if the signature verification is passed, decrypts the encrypted diagnostic task description information to obtain the diagnosis Task description information, and according to the diagnostic package download link information, download the diagnostic package from the remote diagnostic platform through the HTTPS protocol.

Further optionally, the vehicle to be diagnosed executes the diagnosis task, and obtaining a diagnosis result includes:

The vehicle to be diagnosed acquires the diagnostic task description information of the diagnostic task, extracts and judges the diagnostic type of the diagnostic task; the diagnostic type includes trigger type and periodic type;

When the diagnosis type is triggered, the vehicle to be diagnosed extracts the diagnosis strategy in the diagnosis task description information, and checks according to the diagnosis strategy to determine whether the current vehicle state or state combination satisfies the Trigger conditions for diagnostic tasks;

If the triggering condition of the diagnosis task is met, the vehicle to be diagnosed extracts the diagnosis script file in the diagnosis package, executes the remote diagnosis task according to the instructions in the diagnosis script file, and obtains the diagnosis result, and the vehicle to be diagnosed The vehicle ends the remote diagnosis task;

If the trigger condition of the diagnosis task is not satisfied, the vehicle to be diagnosed will feed back the current vehicle state or state combination and unsatisfied condition set to the remote diagnosis platform;

The remote diagnosis platform generates and records diagnostic information according to the current vehicle state or state combination and the unsatisfied condition set;

When the diagnosis type is periodic, the vehicle to be diagnosed extracts the diagnosis task start time, diagnosis task end time and execution time interval in the diagnosis task description information, and extracts the said diagnostic script file;

The vehicle to be diagnosed repeatedly executes the instructions in the diagnosis script file according to the start time of the diagnosis task and the execution time interval to obtain a diagnosis result, until the end time of the diagnosis task, the vehicle to be diagnosed ends Described remote diagnostic tasks.

Further optionally, the vehicle to be diagnosed uploads the diagnosis result to the remote diagnosis platform including:

The vehicle to be diagnosed records the diagnosis result in a diagnosis log;

After the remote diagnosis task is completed, the vehicle to be diagnosed uploads the diagnosis log to the remote diagnosis platform.

In the second aspect, according to the embodiment of this specification, a vehicle remote diagnosis system is provided, including:

A task creation module is used for remote diagnosis platform to create diagnostic tasks;

A protocol judging module, used to judge whether the vehicle to be diagnosed supports the MQTT protocol;

An online judging module, configured to judge whether the vehicle to be diagnosed that supports the MQTT protocol is online;

The first diagnostic task acquisition module is used to send diagnostic instructions to all task-related vehicles to be diagnosed through the MQTT protocol when the vehicle to be diagnosed supports the MQTT protocol and is online, and the vehicle to be diagnosed obtains the Diagnose tasks and download diagnostic packages;

The second diagnosis task acquisition module is used for when the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is not online, the vehicle to be diagnosed periodically pulls the diagnosis task through the HTTPS protocol, and downloads the diagnostic kit;

An execution module, used for the vehicle to be diagnosed to execute the diagnosis task to obtain a diagnosis result;

The feedback module is used for the vehicle to be diagnosed to upload the diagnosis result to the remote diagnosis platform.

In a third aspect, according to an embodiment of this specification, there is provided a computer device, including a memory and a processor, the memory stores a computer program, and the processor implements the vehicle remote control described in the first aspect when executing the computer program. Steps of the diagnostic method.

In a fourth aspect, according to an embodiment of the present specification, a computer-readable storage medium is provided, and a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the vehicle described in the first aspect is implemented. Steps of remote diagnosis method.

The beneficial effects of the embodiments of this description are as follows:

Compared with traditional local diagnosis and near-field diagnosis, this vehicle remote diagnosis method does not need to set up diagnostic equipment near the vehicle to be diagnosed, as long as there is a network, the diagnosis can be implemented, which greatly enriches the application scenarios of diagnosis. Compared with the cloud platform in the prior art, the remote diagnosis platform in the vehicle remote diagnosis method realizes remote diagnosis through real-time diagnosis instructions. Diagnosis is implemented under event-triggered conditions and specified time intervals, which more effectively improves the execution rate and success rate of remote diagnosis in complex network environments. Compared with the prior art that only uses the MQTT protocol for online command-based remote diagnosis, the MQTT protocol and the HTTPS protocol are used to combine the communication protocol method, the diagnostic command is issued through the MQTT protocol, and the diagnostic task and diagnostic package are obtained through the HTTPS protocol. The concurrency capability of remote diagnosis is greatly improved, and the loss of data packets caused by the use of MQTT protocol is avoided. The diagnostic task description information and diagnostic packets are transmitted through the HTTPS protocol to ensure the security of data information. In addition, the diagnostic package transmission in the HTTPS protocol mode can be accelerated by CDN, which improves the transmission efficiency, and the diagnostic log files are automatically uploaded after the remote diagnostic task is completed. This method does not need to wait for a long time to collect diagnostic results, which greatly improves Diagnosis efficiency. At the same time, the use of tasks to realize remote diagnosis can realize the diagnosis of a large number of vehicles at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flow chart of a vehicle remote diagnosis method provided by an embodiment of this specification;

Fig. 2 is a schematic diagram of remote diagnosis implemented by the vehicle remote diagnosis method provided by the embodiment of this specification.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present specification in conjunction with the accompanying drawings in the embodiments of the present specification. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "include" and "have" in the embodiments of this specification and the drawings, as well as any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

The embodiment of this specification discloses a vehicle remote diagnosis method. Each will be described in detail below.

Fig. 1 and Fig. 2 show a vehicle remote diagnosis method provided according to an embodiment of the present specification.

As shown in Figure 1 and Figure 2, the vehicle remote diagnosis method includes:

Step 100: Create a diagnosis task.

Creating a diagnosis task through the remote diagnosis platform mainly includes the following two steps:

(1) Create diagnostic task description information.

In one embodiment, the diagnostic task description information is created through the remote diagnostic platform, and the diagnostic task description information includes but not limited to the diagnostic task start time, diagnostic task end time, diagnostic type, diagnostic policy, diagnostic package type, diagnostic package file, execution Time interval, trigger event, trigger delay time and task description information, wherein, the diagnosis type includes trigger type and periodic type.

In another embodiment, the remote diagnosis platform encrypts and signs the created diagnostic task description information to obtain encrypted diagnostic task description information to ensure communication security.

(2) Create a diagnostic package.

In one embodiment, a diagnostic package is created through a remote diagnostic platform, which includes but is not limited to diagnostic data files (for example, .bin files, .s19 files, etc.), ECU list files to be diagnosed, trigger strategy files, and diagnostic script files (contains diagnostic sequence), signature file.

Step 200: Determine whether the vehicle to be diagnosed supports the MQTT protocol.

Since the agent program of the vehicle to be diagnosed runs on the on-board telematics processor (Telematics BOX, T-BOX) or the gateway, if the equipment of the vehicle to be diagnosed is not convenient for integrating the SDK of the MQTT protocol, the receiving diagnosis cannot be realized based on the MQTT protocol Instructions, that is, the MQTT protocol is not supported. Correspondingly, if the device of the vehicle to be diagnosed is integrated with the SDK of the MQTT protocol, it can receive diagnostic instructions based on the MQTT protocol, that is, it supports the MQTT protocol.

When the vehicle to be diagnosed supports the MQTT protocol, proceed from step 200 to step 300; when the vehicle to be diagnosed does not support the MQTT protocol, proceed to step 900 from step 200.

Step 300: Determine whether the vehicle to be diagnosed is online.

The communication of the MQTT protocol is realized by publishing/subscribing based on topics. The publisher and the subscriber are decoupled in this way, but since there is no direct connection between the two, an intermediate party is needed. That is, the Broker server stores and forwards messages. The remote diagnosis platform judges whether the vehicle to be diagnosed is online through the Broker server and the subscribed topics.

In one embodiment, the vehicle to be diagnosed publishes a status message to the Broker server, and the Broker server determines the first target topic corresponding to the status message, and publishes the status message to the first MQTT client that subscribes to the first target topic. Among them, the first target topic is the topic of whether the vehicle is online or not. Correspondingly, the status message includes online messages and offline messages. The first MQTT client includes the vehicle to be diagnosed and the remote diagnosis platform. The vehicle to be diagnosed is the issuer, and the remote diagnosis platform is Subscriber. The remote diagnosis platform judges whether the vehicle to be diagnosed is online according to the status message released by the Broker server. When the published status message is an online message, it judges that the vehicle to be diagnosed is online; The vehicle is offline, that is, not online. For example, in a specific implementation process, the vehicle to be diagnosed publishes a message with the topic /topic/online/vin to the Broker server, and the remote diagnosis platform subscribes the topic /topic/online/+ to the Broker server at the same time The connection information of the vehicle to be diagnosed can be received.

If the vehicle to be diagnosed is online, proceed to step 400 from step 300; if the vehicle to be diagnosed is offline, proceed to step 900 from step 300.

Step 400: Send a diagnosis instruction to all task-related vehicles to be diagnosed through the MQTT protocol.

After the diagnosis task is created, the remote diagnosis platform immediately sends the diagnosis task to all the online vehicles to be diagnosed associated with the task, and uses the MQTT protocol to send the diagnosis command, and the HTTPS protocol to obtain the diagnosis task and the diagnosis package to realize the remote diagnosis of the online vehicle to be diagnosed .

In one embodiment, the remote diagnosis platform publishes the message to be diagnosed to the Broker server, and the Broker server determines the second target topic corresponding to the message to be diagnosed, and publishes the second target topic to the second MQTT client that subscribes to the second target topic. Wherein, the second target topic is the topic of the diagnosis task, the message to be diagnosed includes a diagnosis instruction, the second MQTT client includes a vehicle to be diagnosed and a remote diagnosis platform, the remote diagnosis platform is a publisher, and the vehicle to be diagnosed is a subscriber. For example, in a specific implementation process, the remote diagnosis platform publishes a message with the topic /topic/vin/campaign/{id} through the Broker server to notify the vehicle to be diagnosed that there is a diagnostic task to be performed. The vehicle to be diagnosed has subscribed to / topic/vin/campaign news, you can receive relevant news immediately.

Step 500: The vehicle to be diagnosed obtains the diagnosis task through the HTTPS protocol.

After the vehicle to be diagnosed receives the message about the diagnosis task, it immediately triggers the operation of pulling the diagnosis task, sends the current basic information of the vehicle to the remote diagnosis platform through HTTPS protocol and obtains the diagnosis task, and the remote diagnosis platform will encrypt the diagnosis task description information and diagnosis package The download link information is sent to the vehicle to be diagnosed together.

In one embodiment, the vehicle to be diagnosed immediately triggers the operation of pulling the diagnosis task according to the message to be diagnosed, which sends the current basic information of the vehicle and the request for obtaining the diagnosis task to the remote diagnosis platform through the HTTPS protocol. The remote diagnosis platform receives the current basic information of the vehicle and the diagnostic task request sent by the vehicle to be diagnosed, and sends the corresponding encrypted diagnostic task description information and diagnostic package download link information to the vehicle to be diagnosed according to the current basic information of the vehicle and the diagnostic task request , the vehicle to be diagnosed receives encrypted diagnostic task description information and diagnostic package download link information.

Step 600: The vehicle to be diagnosed downloads the diagnosis package through the HTTPS protocol.

The embodiment of the present invention adopts the communication protocol mode combining the MQTT protocol and the HTTPS protocol, and all data links pass the HTTPS protocol, so the vehicle to be diagnosed will download the diagnostic package from the remote diagnostic platform in the form of the HTTPS protocol, and the download link comes from the diagnostic on task.

In one embodiment, after the vehicle to be diagnosed receives the encrypted diagnostic task description information and the diagnostic package download link information, it verifies the integrity and reliability of the message, and if the signature verification is passed, decrypts the encrypted diagnostic task description information to obtain the diagnostic task description information , and obtain the download link of the diagnostic package according to the download link information of the diagnostic package, so as to download the diagnostic package from the remote diagnostic platform through the HTTPS protocol. If the message is unreliable and incomplete, an error code is returned directly.

Step 700: The vehicle to be diagnosed executes a diagnosis task to obtain a diagnosis result.

The vehicle to be diagnosed executes the diagnosis task according to the diagnosis type of the diagnosis task.

When the diagnostic type of the diagnostic task is triggered, the vehicle to be diagnosed is checked sequentially according to the diagnostic strategies defined in the diagnostic strategy to determine whether the current vehicle state or state combination meets the triggering conditions of the triggered diagnostic task. If so, the vehicle to be diagnosed Immediately execute the remote diagnosis task according to the instructions of the diagnosis script file, and record the diagnosis result in the diagnosis log. After the remote diagnosis task ends, if it is not satisfied, the vehicle to be diagnosed will not be executed, but the diagnosis task will remain valid until When the end time of the diagnosis task is reached, the current vehicle state or state combination and unsatisfied condition set are returned to the remote diagnosis platform at the same time, and the remote diagnosis platform records the diagnosis information.

In an embodiment, the vehicle to be diagnosed obtains the diagnostic task description information of the diagnostic task, extracts and determines the diagnostic type of the diagnostic task. When the diagnosis type is triggered, the vehicle to be diagnosed extracts the diagnosis strategy in the diagnosis task description information, and checks according to the diagnosis strategy to determine whether the current vehicle state or state combination meets the trigger condition of the diagnosis task. If the triggering conditions of the diagnosis task are met, the vehicle to be diagnosed extracts the diagnosis script file in the diagnosis package, executes the remote diagnosis task according to the instructions in the diagnosis script file, and obtains the diagnosis result, and the vehicle to be diagnosed ends the remote diagnosis task; Trigger conditions, but the diagnostic task is valid until the end of the diagnostic task. When the end time is up and the trigger conditions of the diagnostic task are not met, the vehicle to be diagnosed will feed back the current vehicle state or state combination and unsatisfied condition set to the remote diagnosis platform, and the remote diagnosis platform will A collection of conditions met that generate and log diagnostic information.

When the diagnostic type of the diagnostic task is periodical, the vehicle to be diagnosed will repeatedly execute the instructions of the diagnostic script file according to the start time of the diagnostic task and the execution time interval, and record the diagnostic results in the diagnostic log until the end of the diagnostic task. The remote diagnosis task ends.

In one embodiment, when the diagnosis type is periodic, the vehicle to be diagnosed extracts the diagnosis task start time, diagnosis task end time and execution time interval in the diagnosis task description information, and extracts the diagnosis script file in the diagnosis package, and the diagnosis task The vehicle repeatedly executes the instructions in the diagnostic script file according to the start time of the diagnostic task and the execution time interval, and obtains the diagnostic result until the end time of the diagnostic task, and the vehicle to be diagnosed ends the remote diagnostic task.

Step 800: The vehicle to be diagnosed uploads the diagnosis result to the remote diagnosis platform.

In one embodiment, the vehicle to be diagnosed records the diagnosis result in a diagnosis log, and after the remote diagnosis task is completed, the vehicle to be diagnosed uploads the diagnosis log to the remote diagnosis platform.

The diagnostic task is a triggered diagnostic task. When the triggering conditions of the task are met, the vehicle to be diagnosed will execute the remote diagnostic task according to the instructions of the diagnostic script file, and record the diagnostic result in the diagnostic log. The vehicle uploads the diagnosis results to the remote diagnosis platform in the form of logs. The diagnostic task is a periodic diagnostic task. The vehicle to be diagnosed will repeatedly execute the instructions of the diagnostic script file according to the start time of the diagnostic task and the execution time interval, and record the diagnostic results in the diagnostic log until the end of the diagnostic task. When the diagnosis task is over, similarly, the vehicle to be diagnosed will upload the diagnosis result to the remote diagnosis platform in the form of a log.

Step 900: The vehicle to be diagnosed periodically pulls the diagnosis task through the HTTPS protocol.

When the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is offline, the diagnostic main program of the vehicle to be diagnosed implements remote diagnosis by actively pulling tasks. The method of extraction, for example, once every 6 hours. When the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is offline, the message cannot be sent to the vehicle to be diagnosed through the MQTT protocol, but the created diagnostic task can be stored in the database of the remote diagnosis platform. When the vehicle to be diagnosed is connected next time When arriving at the remote diagnosis platform, the remote diagnosis platform can send the encrypted diagnosis task description information and the diagnosis package download link information to the vehicle to be diagnosed, and the vehicle to be diagnosed can complete the remote diagnosis by receiving the diagnosis task and downloading the diagnosis package.

Specifically, in one embodiment, when the vehicle to be diagnosed meets the pull task conditions, the vehicle to be diagnosed establishes remote communication with the remote diagnosis platform based on the HTTPS protocol, and sends the current basic information of the vehicle and a diagnosis task request to the remote diagnosis platform, Among them, the pulling task conditions (that is, the triggering conditions of the pulling task) include the vehicle being in the IGON gear and reaching the preset pulling time, that is, when the vehicle is in the IGON gear, the vehicle to be diagnosed will connect to the remote diagnosis platform through the HTTPS protocol , to obtain the diagnosis task, or reach the preset pull time, for example, the vehicle to be diagnosed is connected to the remote diagnosis platform through the HTTPS protocol to obtain the diagnosis task after a preset time interval. The remote diagnosis platform receives the current basic information of the vehicle and the diagnostic task request sent by the vehicle to be diagnosed, and extracts the diagnostic tasks in the database according to the current basic information of the vehicle and the diagnostic task request. Package and diagnostic package download link information. The remote diagnosis platform sends the extracted encrypted diagnostic task description information and diagnostic package download link information to the vehicle to be diagnosed, and the vehicle to be diagnosed receives the encrypted diagnostic task description information and diagnostic package download link information, and verifies the integrity and reliability of the message. If the signature is passed, the encrypted diagnostic task description information will be decrypted to obtain the diagnostic task description information, and the download link of the diagnostic package will be obtained according to the diagnostic package download link information, so as to download the diagnostic package from the remote diagnostic platform through the HTTPS protocol. If the message is unreliable and incomplete, Then return the error code directly.

To sum up, this manual discloses a vehicle remote diagnosis method, which adopts the communication protocol method combining the MQTT protocol and the HTTPS protocol. Regardless of whether the vehicle to be diagnosed is online or not, a diagnosis task can be created through the remote diagnosis platform. When the vehicle to be diagnosed is online Immediately send diagnostic commands to the vehicle to be diagnosed through the MQTT protocol to notify the vehicle to be diagnosed of a new diagnostic task. The vehicle to be diagnosed can obtain the diagnostic task in real time through the HTTPS protocol and complete the remote diagnosis. When the vehicle to be diagnosed is offline, the remote diagnosis platform can be extended The diagnostic tasks are stored in time. Once the vehicle to be diagnosed actively connects to the remote diagnosis platform through the HTTPS protocol, the diagnostic tasks can be obtained immediately and the remote diagnosis can be completed.

Compared with traditional local diagnosis and near-field diagnosis, this vehicle remote diagnosis method does not need to set up diagnostic equipment near the vehicle to be diagnosed, as long as there is a network, the diagnosis can be implemented, which greatly enriches the application scenarios of diagnosis. Compared with the cloud platform in the prior art, the remote diagnosis platform in the vehicle remote diagnosis method realizes remote diagnosis through real-time diagnosis instructions. Diagnosis is implemented under event-triggered conditions and specified time intervals, which more effectively improves the execution rate and success rate of remote diagnosis in complex network environments. Compared with the prior art that only uses the MQTT protocol for online command-based remote diagnosis, the MQTT protocol and the HTTPS protocol are used to combine the communication protocol method, the diagnostic command is issued through the MQTT protocol, and the diagnostic task and diagnostic package are obtained through the HTTPS protocol. The concurrency capability of remote diagnosis is greatly improved, and the loss of data packets caused by the use of MQTT protocol is avoided. The diagnostic task description information and diagnostic packets are transmitted through the HTTPS protocol to ensure the security of data information. In addition, the diagnostic package transmission in the HTTPS protocol mode can be accelerated by CDN, which improves the transmission efficiency, and the diagnostic log files are automatically uploaded after the remote diagnostic task is completed. This method does not need to wait for a long time to collect diagnostic results, which greatly improves Diagnosis efficiency. At the same time, the use of tasks to realize remote diagnosis can realize the diagnosis of a large number of vehicles at the same time.

The embodiment of the specification also discloses a vehicle remote diagnosis system, including a task creation module, a protocol judgment module, an online judgment module, a first diagnosis task acquisition module, a second diagnosis task acquisition module, an execution module and a feedback module.

Among them, the task creation module is used for the remote diagnosis platform to create diagnosis tasks.

The protocol judging module is used to judge whether the vehicle to be diagnosed supports the MQTT protocol.

The online judging module is used to judge whether the vehicle to be diagnosed supporting the MQTT protocol is online.

The first diagnostic task acquisition module is used to send diagnostic instructions to all task-related vehicles to be diagnosed through the MQTT protocol when the vehicle to be diagnosed supports the MQTT protocol and is online, and the vehicle to be diagnosed obtains the diagnostic task through the HTTPS protocol and downloads the diagnostic package.

The second diagnosis task acquiring module is used for when the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is not online, the vehicle to be diagnosed periodically pulls the diagnosis task through the HTTPS protocol and downloads the diagnosis package.

The execution module is used for the vehicle to be diagnosed to execute the diagnosis task to obtain the diagnosis result.

The feedback module is used for the vehicle to be diagnosed to upload the diagnosis result to the remote diagnosis platform.

The vehicle remote diagnosis system provided in this embodiment is based on the same concept as the vehicle remote diagnosis method of the present invention, and the technical effect it brings is the same as the embodiment of the vehicle remote diagnosis method of the present invention, so for specific limitations on the vehicle remote diagnosis system, please refer to The above-mentioned limitations on the vehicle remote diagnosis method will not be repeated here. Each module in the above-mentioned vehicle remote diagnosis system can be fully or partially realized by software, hardware and a combination thereof. In addition, the above-mentioned modules can be embedded in or independent of the processor of the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of the above-mentioned modules.

The embodiment of the specification also discloses a computer device, which includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the vehicle remote diagnosis method when executing the computer program.

The embodiment of this specification also discloses a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned vehicle remote diagnosis method are realized.

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of an embodiment, and the modules or processes in the accompanying drawing are not necessarily necessary for implementing the present invention.

Those skilled in the art can understand that: the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, and can also be changed and located in one or more devices different from the embodiment. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A vehicle remote diagnosis method, characterized in that, comprising: Create diagnostic tasks; Determine whether the vehicle to be diagnosed supports the MQTT protocol; When the vehicle to be diagnosed supports the MQTT protocol, determine whether the vehicle to be diagnosed is online; If the vehicle to be diagnosed is online, send a diagnosis instruction to all the vehicles to be diagnosed associated with the task through the MQTT protocol, and the vehicle to be diagnosed obtains the diagnosis task through the HTTPS protocol, and downloads the diagnosis package; When the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is not online, the vehicle to be diagnosed periodically pulls the diagnostic task through the HTTPS protocol, and downloads the diagnostic package; The vehicle to be diagnosed executes the diagnosis task to obtain a diagnosis result; The vehicle to be diagnosed uploads the diagnosis result to the remote diagnosis platform. 2. The vehicle remote diagnosis method according to claim 1, wherein said creating a diagnosis task comprises: Create diagnosis task description information through the remote diagnosis platform; the diagnosis task description information includes diagnosis task start time, diagnosis task end time, diagnosis type, diagnosis strategy, diagnosis package type, diagnosis package file, execution time interval, trigger event, Trigger delay time, task description information; A diagnostic package is created through the remote diagnostic platform; the diagnostic package includes a diagnostic data file, an ECU list file to be diagnosed, a trigger policy file, a diagnostic script file, and a signature file. 3. The vehicle remote diagnosis method according to claim 2, wherein said creating a diagnosis task further comprises: The diagnostic task description information is encrypted and signed to obtain the encrypted diagnostic task description information. 4. The vehicle remote diagnosis method according to claim 3, wherein the judging whether the vehicle to be diagnosed is online comprises: The vehicle to be diagnosed publishes a status message to the Broker server, and the Broker server determines the first target topic corresponding to the status message, and publishes the status message to the first MQTT client subscribing to the first target topic; The first MQTT client includes the vehicle to be diagnosed and the remote diagnosis platform, and the status message includes an online message and an offline message; The remote diagnosis platform judges whether the vehicle to be diagnosed is online according to the status message. 5. The vehicle remote diagnosis method according to claim 4, wherein the diagnostic command is sent to all tasks associated with the vehicle to be diagnosed through the MQTT protocol, and the vehicle to be diagnosed obtains the diagnostic task through the HTTPS protocol , and download the diagnostic package specifically including: The remote diagnosis platform publishes a message to be diagnosed to the Broker server, and the Broker server determines a second target topic corresponding to the message to be diagnosed, and publishes the second target topic to subscribers of the second target topic A second MQTT client; the second MQTT client includes the vehicle to be diagnosed and the remote diagnosis platform, and the message to be diagnosed includes a diagnosis instruction; According to the message to be diagnosed, the vehicle to be diagnosed sends the current basic information of the vehicle and a diagnosis task request to the remote diagnosis platform through the HTTPS protocol; The remote diagnosis platform sends encrypted diagnosis task description information and diagnosis package download link information to the vehicle to be diagnosed according to the current basic information of the vehicle and the request for obtaining a diagnosis task; The vehicle to be diagnosed receives the encrypted diagnostic task description information and the diagnostic package download link information, verifies the integrity and reliability of the message, and if the signature verification is passed, decrypts the encrypted diagnostic task description information to obtain the diagnosis Task description information, and according to the diagnostic package download link information, download the diagnostic package from the remote diagnostic platform through the HTTPS protocol. 6. The vehicle remote diagnosis method according to claim 4, wherein the vehicle to be diagnosed periodically pulls the diagnostic task through the HTTPS protocol, and downloading the diagnostic package specifically includes: When the vehicle to be diagnosed meets the pull task conditions, the vehicle to be diagnosed establishes remote communication with the remote diagnosis platform based on the HTTPS protocol, and sends the current basic information of the vehicle and a diagnosis task request to the remote diagnosis platform; The pulling task conditions mentioned above include that the vehicle is in IGON gear and the preset pulling time is reached; The remote diagnosis platform extracts the diagnostic task in the database according to the current basic information of the vehicle and the request for obtaining the diagnostic task; the diagnostic task includes encrypted diagnostic task description information, diagnostic package and diagnostic package download link information; The remote diagnosis platform sends the encrypted diagnosis task description information and the diagnosis package download link information to the vehicle to be diagnosed; The vehicle to be diagnosed receives the encrypted diagnostic task description information and the diagnostic package download link information, verifies the integrity and reliability of the message, and if the signature verification is passed, decrypts the encrypted diagnostic task description information to obtain the diagnosis Task description information, and according to the diagnostic package download link information, download the diagnostic package from the remote diagnostic platform through the HTTPS protocol. 7. The vehicle remote diagnosis method according to claim 2, wherein the vehicle to be diagnosed performs the diagnosis task, and obtaining the diagnosis result comprises: The vehicle to be diagnosed acquires the diagnostic task description information of the diagnostic task, extracts and judges the diagnostic type of the diagnostic task; the diagnostic type includes trigger type and periodic type; When the diagnosis type is triggered, the vehicle to be diagnosed extracts the diagnosis strategy in the diagnosis task description information, and checks according to the diagnosis strategy to determine whether the current vehicle state or state combination satisfies the Trigger conditions for diagnostic tasks; If the triggering condition of the diagnosis task is met, the vehicle to be diagnosed extracts the diagnosis script file in the diagnosis package, executes the remote diagnosis task according to the instructions in the diagnosis script file, and obtains the diagnosis result, and the vehicle to be diagnosed The vehicle ends the remote diagnosis task; If the trigger condition of the diagnosis task is not satisfied, the vehicle to be diagnosed will feed back the current vehicle state or state combination and unsatisfied condition set to the remote diagnosis platform; The remote diagnosis platform generates and records diagnostic information according to the current vehicle state or state combination and the unsatisfied condition set; When the diagnosis type is periodic, the vehicle to be diagnosed extracts the diagnosis task start time, diagnosis task end time and execution time interval in the diagnosis task description information, and extracts the said diagnostic script file; The vehicle to be diagnosed repeatedly executes the instructions in the diagnosis script file according to the start time of the diagnosis task and the execution time interval to obtain a diagnosis result until the end time of the diagnosis task, and the vehicle to be diagnosed ends Described remote diagnostic tasks. 8. The vehicle remote diagnosis method according to claim 7, wherein uploading the diagnosis result of the vehicle to be diagnosed to the remote diagnosis platform comprises: The vehicle to be diagnosed records the diagnosis result in a diagnosis log; After the remote diagnosis task is completed, the vehicle to be diagnosed uploads the diagnosis log to the remote diagnosis platform. 9. A vehicle remote diagnosis system, characterized in that it comprises: A task creation module is used for remote diagnosis platform to create diagnostic tasks; A protocol judging module, used to judge whether the vehicle to be diagnosed supports the MQTT protocol; An online judging module, configured to judge whether the vehicle to be diagnosed that supports the MQTT protocol is online; The first diagnostic task acquisition module is used to send diagnostic instructions to all task-related vehicles to be diagnosed through the MQTT protocol when the vehicle to be diagnosed supports the MQTT protocol and is online, and the vehicle to be diagnosed obtains the Diagnose tasks and download diagnostic packages; The second diagnosis task acquisition module is used for when the vehicle to be diagnosed does not support the MQTT protocol or the vehicle to be diagnosed is not online, the vehicle to be diagnosed periodically pulls the diagnosis task through the HTTPS protocol, and downloads the diagnostic kit; An execution module, used for the vehicle to be diagnosed to execute the diagnosis task to obtain a diagnosis result; The feedback module is used for the vehicle to be diagnosed to upload the diagnosis result to the remote diagnosis platform. 10. A computer device, characterized in that it includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the vehicle remote control according to any one of claims 1-8 is realized. Steps of the diagnostic method.

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