CN105137964A - Automobile fault remote diagnosis system based on cellphone APP - Google Patents

Abstract

The invention discloses a remote diagnosis system for automobile faults based on a mobile phone APP, which includes a mobile phone APP software, a vehicle-mounted interface device and a remote service center, and the mobile phone APP software sends a user's diagnosis request to the remote service center through a mobile network , the remote service center sends a diagnostic command to the mobile APP software according to the diagnostic request, and the mobile APP software forwards the diagnostic command to the vehicle interface device through the wireless network, and the vehicle interface device analyzes the diagnostic command and sets Diagnosis protocol communication parameters with the vehicle electronic system to be diagnosed, or send a diagnosis request message to the vehicle electronic system to be diagnosed through the vehicle network. The invention enables users to remotely enjoy automobile fault diagnosis service without increasing much cost, shortens the time of automobile fault diagnosis, reduces labor cost, and improves the efficiency of automobile fault diagnosis.

Description

A remote diagnosis system for automobile faults based on mobile phone APP

technical field

The invention relates to the technical field of automobile electronic diagnosis, in particular to a remote diagnosis system for automobile faults based on a mobile phone APP.

Background technique

In the field of automotive fault diagnosis technology, the traditional fault diagnosis mainly adopts the scheme that technical personnel carry out fault diagnosis on the vehicle with professional equipment on site, which will have the following defects:

1. Since the traditional automobile fault diagnosis uses professional diagnostic equipment, it requires high skill level of the diagnostic personnel, the operation is complicated, the diagnosis efficiency of some faults is low, and it is easy to cause misjudgment, which brings difficulties to the vehicle fault diagnosis.

2. Since most of the traditional vehicle fault diagnosis requires on-site operation by professional technicians, it often cannot be diagnosed and repaired in time after the vehicle breaks down, which has a certain lag.

3. Due to the long time period of traditional automobile fault diagnosis, the feedback of diagnosis results is not timely.

4. Due to the strong customization of traditional automotive fault diagnosis equipment, the applicability is low.

Therefore, in order to improve the real-time performance of automobile fault diagnosis, save labor costs, improve fault diagnosis efficiency, and timely feedback fault diagnosis results, it is necessary to develop a remote diagnosis system for automobile faults based on mobile phone APP.

Contents of the invention

The purpose of the present invention is to provide a remote diagnosis system for automobile faults based on mobile phone APP in order to make up for the defects of the prior art.

The present invention is achieved through the following technical solutions:

A remote diagnosis system for automobile faults based on a mobile phone APP, including a mobile phone APP software, a vehicle-mounted interface device and a remote service center, the mobile phone APP software sends a user's diagnosis request to the remote service center through a mobile network, and the remote service center According to the diagnosis request, a diagnosis command is sent to the mobile phone APP software, and the mobile phone APP software forwards the diagnosis command to the vehicle interface device through the wireless network, and the vehicle interface device parses the diagnosis command, and sets it with the vehicle to be diagnosed Diagnosis protocol communication parameters between electronic systems, or send a diagnostic request message to the automotive electronic system to be diagnosed through the vehicle network, the vehicle interface device receives the diagnostic response result of the vehicle electronic system to be diagnosed, and forwards it to the A remote service center, the remote service center analyzes the diagnosis response result, generates a diagnosis report, and feeds back to the user through the mobile phone APP software.

The diagnosis request includes user information and vehicle model information. The remote service center verifies the user's identity according to the user information, and determines the diagnostic protocol communication parameters and supported diagnostic services of the vehicle to be diagnosed according to the vehicle model information.

The mobile network between the mobile phone APP software and the remote service center is 2G/3G/4G network or WIFI wireless network; the wireless network between the mobile phone APP software and the vehicle interface device is Bluetooth or WIFI wireless network.

The diagnostic command includes a protocol configuration command or a diagnostic control command, the protocol configuration command is used to configure the diagnostic protocol communication parameters between the vehicle interface device and the automotive electronic system to be diagnosed, and the diagnostic control command is used to generate a message to the automotive electronic system to be diagnosed Diagnosis request message sent by the system.

The vehicle network is CAN bus, LIN bus, K line or MOST bus.

The diagnosis protocol communication is used to specify information such as the communication rate of the physical layer protocol in the diagnosis protocol, the message mark and message filling in the link layer protocol, and the time parameters in the network layer and application layer protocols.

The vehicle-mounted interface device includes a central processing unit, a power supply unit, a crystal oscillator circuit, a reset circuit, a wireless communication control unit, a vehicle-mounted network communication control unit, and a connection unit for connecting to the vehicle-mounted network. The power supply unit supplies power to other components, and the crystal oscillator circuit, reset The circuit, the wireless communication control part, and the vehicle network communication control part are connected to the central processing unit. The crystal oscillator circuit provides a 15M quartz crystal oscillator. The reset circuit is provided with a reset button that can make the central processing unit return to the initial state. The APP software is used for data transmission, and the vehicle network communication control part is used for data transmission with the vehicle electronic system to be diagnosed. interface connection; the working process of the vehicle-mounted interface device is carried out in the following steps:

a1. Through the wireless communication control unit, receive the diagnostic command sent by the APP software of the mobile phone;

a2, analyze the diagnostic command, if the protocol configuration command, then configure the diagnostic protocol communication parameters, if it is a diagnostic control command, then according to the requirements of the diagnostic protocol communication parameters, the diagnostic request message generated by the diagnostic control command is passed through the vehicle network communication control unit, Send to the car electronic system to be diagnosed;

a3. Receive the diagnosis response result of the vehicle electronic system to be diagnosed through the vehicle network communication control unit, and send the diagnosis response result to the mobile phone APP software through the wireless communication control unit.

Described mobile phone APP software comprises mobile network communication management module, wireless communication management module and user interface module, and the work process of described mobile phone APP software is carried out as follows:

b1. Receive a user diagnosis request through the user interface module;

b2. The mobile network communication management module sends the user diagnosis request to the remote service center through the mobile network;

b3. Receive the diagnostic command from the remote service center and send it to the vehicle interface device through the wireless communication management module;

b4. Receive the diagnostic response result of the vehicle-mounted interface device, and send it to the remote service center through the mobile network communication management module;

b5. Receive the diagnosis result from the remote service center and feed it back to the user through the user interface module.

The remote service center includes a communication management module, a vehicle type management module, a diagnosis management module and a diagnostic personnel interface module. The diagnostic personnel interface module is used to receive the diagnostic operation to be performed by the diagnostic personnel, and submit the diagnostic operation to the diagnostic management module; vehicle type management The module is used to manage the vehicle model information, including the diagnostic protocol adopted by the vehicle to be diagnosed, communication parameters, supported diagnostic services, and the format of the diagnostic service; the communication management module is used to establish a secure communication link with the mobile APP software, and is responsible for communicating with the mobile APP software. The diagnosis management module is responsible for the management of the diagnosis process, including confirmation of user requests, issuance of diagnosis commands, analysis of diagnosis response results, and generation of diagnosis reports; the working process of the remote service center is carried out in the following steps:

c1. Receive the diagnostic request sent by the mobile APP software;

c2. Send a protocol configuration command to the mobile APP software;

c3. Send diagnostic control commands to the mobile APP software;

c4. Receive the diagnosis response result sent by the mobile phone APP software;

c5. Repeat c3 and c4 until the end of the diagnosis;

c6. Generate a diagnostic report and send it to the mobile APP software.

The advantages of the present invention are: the mobile phone APP software involved in the present invention is suitable for most smart phone models, easy to operate, strong in practicability, wide in application range, low in skill level requirements for operators, and high in utilization rate; The remote fault diagnosis of the vehicle greatly reduces the labor cost, effectively ensures the real-time performance of the vehicle fault diagnosis, and shortens the time period of the vehicle fault diagnosis.

Description of drawings

Fig. 1 is a schematic flow chart of the present invention.

Fig. 2 is a structural block diagram of the present invention.

Fig. 3 is a signal flow diagram of the present invention.

Fig. 4 is a schematic diagram of the diagnostic command format of the present invention.

Detailed ways

As shown in Figures 1, 2, 3, and 4, a mobile phone APP-based vehicle fault remote diagnosis system includes a mobile phone APP software 2, a vehicle-mounted interface device 1 and a remote service center 3, and the mobile phone APP software 2 passes through a mobile network. The user's diagnostic request is sent to the remote service center 3, and the remote service center 3 sends a diagnostic command to the mobile phone APP software 2 according to the diagnostic request, and the mobile phone APP software 2 forwards the diagnostic command to the remote service center through a wireless network. The vehicle-mounted interface device 1, the vehicle-mounted interface device 1 parses the diagnostic command, sets the diagnostic protocol communication parameters with the vehicle electronic system to be diagnosed, or sends a diagnosis request message to the vehicle electronic system to be diagnosed through the vehicle network, the The vehicle interface device 1 receives the diagnostic response result of the automotive electronic system to be diagnosed, and forwards it to the remote service center 3 through the mobile phone APP software 2, and the remote service center 3 analyzes the diagnostic response result, generates a diagnostic report, and passes the Mobile APP software 2, feedback to users.

The diagnosis request includes user information and vehicle model information. The remote service center 3 verifies the identity of the user according to the user information, and determines the diagnostic protocol communication parameters and supported diagnostic services of the vehicle to be diagnosed according to the vehicle model information.

The mobile network between the mobile phone APP software 2 and the remote service center 3 is 2G/3G/4G network or WIFI wireless network; the wireless network between the mobile phone APP software 2 and the vehicle interface device 1 is Bluetooth or WIFI wireless network.

The diagnostic command includes a protocol configuration command or a diagnostic control command, the protocol configuration command is used to configure the diagnostic protocol communication parameters between the vehicle interface device 1 and the electronic system of the vehicle to be diagnosed, and the diagnostic control command is used to generate a message to the vehicle to be diagnosed Diagnostic request message sent by electronic system.

The vehicle network is CAN bus, LIN bus, K line or MOST bus.

The diagnosis protocol communication is used to specify information such as the communication rate of the physical layer protocol in the diagnosis protocol, the message mark and message filling in the link layer protocol, and the time parameters in the network layer and application layer protocols.

The vehicle interface device 1 includes a central processing unit 11, a power supply unit 12, a crystal oscillator circuit 13, a reset circuit 14, a wireless communication control unit 16, a vehicle network communication control unit 17 and a connection unit 15 for connecting to the vehicle network, and the power supply unit 12 Power supply for other parts, crystal oscillator circuit 13, reset circuit 14, wireless communication control unit 16, vehicle-mounted network communication control unit 17 are connected with central processing unit 11, crystal oscillator circuit 13 provides the quartz crystal oscillator of 15M, reset circuit 14 is provided with and can make central processing unit The reset button for the device to return to the initial state, the wireless communication control part 16 is used for data transmission with the mobile phone APP software 2, the vehicle network communication control part 17 is used for data transmission with the automotive electronic system to be diagnosed, and the central processing unit 11 is a MC9S0DZ60 central Processor, described connection part 15 is a kind of standard interface socket, is used for being connected with automobile OBD interface; The work process of described vehicle interface device 1 is carried out as follows:

a1, through the wireless communication control part 16, receive the diagnosis command sent by the mobile phone APP software 2;

a2, analyze the diagnostic command, if the protocol configuration command, then configure the diagnostic protocol communication parameters, if it is a diagnostic control command, then according to the requirements of the diagnostic protocol communication parameters, the diagnostic request message generated by the diagnostic control command is passed through the vehicle network communication control unit 17 , sent to the vehicle electronic system to be diagnosed;

a3. Receive the diagnosis response result of the vehicle electronic system to be diagnosed through the vehicle network communication control part 17, and send the diagnosis response result to the mobile phone APP software 2 through the wireless communication control part 16.

Described mobile phone APP software 2 comprises mobile network communication management module 22, wireless communication management module 23 and user interface module 21, and the work process of described mobile phone APP software 2 is carried out as follows:

b1. Receive a user diagnosis request through the user interface module 21;

b2. The mobile network communication management module 22 sends the user diagnosis request to the remote service center 3 through the mobile network;

b3. Receive the diagnostic command from the remote service center 3 and send it to the vehicle interface device 1 through the wireless communication management module 23;

b4. Receive the diagnostic response result of the vehicle interface device 1 and send it to the remote service center 3 through the mobile network communication management module 22;

b5. Receive the diagnosis result from the remote service center 3 and feed it back to the user through the user interface module 21 .

The remote service center 3 includes a communication management module 34, a vehicle type management module 32, a diagnosis management module 33, and a diagnostic personnel interface module 31. The diagnostic personnel interface module 31 is used to receive the diagnostic operations to be performed by the diagnostic personnel, and submit the diagnostic operations to the Diagnosis management module 33; vehicle type management module 32 is used for managing vehicle type information, comprises the diagnostic agreement that the vehicle to be diagnosed adopts, communication parameter, the diagnostic service of support, the format of diagnostic service; Communication management module 33 is used for establishing safe with mobile APP software 2 Communication link, and is responsible for the data transmission between mobile phone APP software 2; Diagnosis management module 33 is responsible for the management of diagnosis process, including user request confirmation, diagnosis order issuing, diagnosis response result analysis, diagnosis report generation; The remote service The working process of Center 3 is carried out in the following steps:

c1. Receive the diagnostic request sent by the mobile APP software;

c2. Send a protocol configuration command to the mobile APP software;

c3. Send diagnostic control commands to the mobile APP software;

c4. Receive the diagnosis response result sent by the mobile phone APP software;

c5. Repeat c3 and c4 until the end of the diagnosis;

c6. Generate a diagnostic report and send it to the mobile APP software.

Figure 3 shows the signal flow diagram of the remote diagnosis system for vehicle faults based on the mobile phone APP, and Figure 4 shows the definition of the diagnostic command format of the remote diagnosis system for vehicle faults based on the mobile phone APP. In this embodiment, as an example, the mobile phone APP software 2 and the remote service center 3 adopt 3G communication, and the vehicle interface device 1 adopts Bluetooth communication, the vehicle network uses the CAN bus, and the application layer of the diagnostic protocol used by the vehicle electronic system to be diagnosed It is ISO14229, the session layer is ISO15765-3, and the network layer is ISO15765-2.

In this embodiment, before performing fault diagnosis on the vehicle, the user connects the standard interface socket of the vehicle interface device to the OBD interface of the vehicle to be diagnosed.

The user fills in the identity information and the model information of the vehicle to be diagnosed through the mobile phone APP software, and sends it to the remote service center as a diagnosis request. The diagnosis command for communication parameter configuration is the protocol configuration command, and the protocol configuration command is encapsulated according to the diagnosis command format shown in FIG. 4 .

The communication parameter configuration content of the above diagnosis protocol specifically includes information such as the communication rate of the physical layer protocol, the message flag and message filling in the link layer protocol, and the time parameters in the network layer and application layer protocols. For example, for the CAN bus, the communication rate can be set to 500kbps, 1Mbps, etc.; during the link layer data frame transmission process, when the data frame length is less than 8 bytes, it can be set to fill with 0 or not to fill with 0. According to the ISO15765-2, ISO15765-3 and ISO14229 protocol standards, the maximum time for sending a single data frame at the network layer, the maximum time for receiving a response, and the maximum time interval for continuous transmission can be set, and the session hold time in the session layer can be set. The worst response time in the application layer.

The mobile phone APP software forwards the above protocol configuration commands to the vehicle interface device through the wireless communication management module. The on-vehicle interface device parses according to the diagnostic command format shown in Figure 4, sets the communication rate, time parameters and other information with the automotive electronic system to be diagnosed, and sends the configuration result feedback to the mobile phone APP software through the wireless communication control part, and the mobile phone APP The software sends the received configuration result feedback information to the remote service center through the mobile network communication management module.

After the configuration is completed, the diagnostic personnel in the remote service center perform one or more diagnostic operations through the diagnostic personnel interface module, and the diagnostic management module encapsulates the content of each diagnostic operation according to the diagnostic command format shown in Figure 4 to generate diagnostic control commands. The mobile phone APP software is sent to the mobile phone APP software through the communication management module, and the mobile phone APP software forwards the received diagnostic command to the vehicle interface device through the wireless communication management module.

After receiving the above-mentioned diagnostic control command, the vehicle-mounted interface device parses it according to the format of the diagnostic command shown in Figure 4 to obtain a diagnostic request message. The on-vehicle interface device sends the diagnostic request message to the automotive electronic system to be diagnosed according to the requirements of the communication parameters of the above-mentioned diagnostic protocol, and sends the diagnostic response result to the mobile APP software through the wireless communication control part. The mobile APP software sends the diagnosis response result to the remote service center. The diagnostic management module of the remote service center analyzes the response results of all diagnostic operations, generates a diagnostic report, and sends it to the mobile phone APP software through the communication management module, and gives feedback to the user.

Figure 4 shows the definition of the diagnostic command format, and the specific fields include start character, protocol field, message length, command body, checksum, and end character. Among them, the start character and end character fields each occupy 1 byte, and the value is 255 in decimal. The message length field is defined as two bytes, which is used to indicate the length of the diagnostic command message. The protocol field is defined as 1 byte, which is used to distinguish the type of the message. If it is a decimal number 0, it means that the command is a protocol configuration command. If it is a decimal number 1, it means a diagnostic control command. The checksum field is defined as 2 bytes, and the CRC check is used. The length of the command body is variable. If it is a protocol configuration command, the command body includes information such as the communication rate of the physical layer protocol, the message flag and message filling in the link layer protocol, and the time parameters in the network layer and application layer protocols; If it is a diagnostic control command, the command body is the diagnostic operation information input by the diagnostician, and its format follows the ISO14229 application layer message format.

Claims (9)

1. the vehicle failure remote diagnosis system based on mobile phone A PP, it is characterized in that: include mobile phone A PP software, vehicle-mounted interface equipment and remote service center, the diagnosis request of user is sent to described remote service center by mobile network by described mobile phone A PP software, remote service center is asked according to described diagnosis, diagnostic command is sent to mobile phone A PP software, described diagnostic command is forwarded by wireless network and gives described vehicle-mounted interface equipment by described mobile phone A PP software, vehicle-mounted interface equipment resolves described diagnostic command, the diagnosing protocol messaging parameter that setting and follow-up break between automobile electronic system, or pass through In-vehicle networking, to follow-up break automobile electronic system send diagnosis request message, described vehicle-mounted interface equipment receives follow-up and to break the diagnostic response result of automobile electronic system, by described mobile phone A PP software forward to remote service center, described remote service center analyzes described diagnostic response result, generate diagnosis report, and by described mobile phone A PP software, feed back to user.

2. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, it is characterized in that: described diagnosis request comprises user profile and vehicle information, remote service center is verified according to the identity of described user's information, determines to treat the diagnosis diagnosing protocol messaging parameter of vehicle and the diagnosis service of support according to described vehicle information.

3. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, is characterized in that: the mobile network between described mobile phone A PP software and remote service center is 2G/3G/4G network or WIFI wireless network; Wireless network between described mobile phone A PP software and vehicle-mounted interface equipment is bluetooth or WIFI wireless network.

4. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, it is characterized in that: described diagnostic command comprises protocol configuration order or diagnosis control order, the diagnosing protocol messaging parameter that described protocol configuration order is broken between automobile electronic system for configuring vehicle-mounted interface equipment and follow-up, described diagnosis control order to be broken the diagnosis request message that automobile electronic system sends to follow-up for generating.

5. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, is characterized in that: described In-vehicle networking is CAN, LIN bus, K line or MOST bus.

6. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, is characterized in that: described diagnosing protocol communication is in order to specify message flag in the traffic rate of physical layer protocol in diagnosing protocol, link layer protocol and the information such as message is filled, time parameter in network layer and application layer protocol.

7. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, it is characterized in that: described vehicle-mounted interface equipment comprises central processing unit, power supply unit, crystal oscillating circuit, reset circuit, radio communication control assembly, In-vehicle networking communication control unit and the link in order to connect In-vehicle networking, power supply unit is that miscellaneous part is powered, crystal oscillating circuit, reset circuit, radio communication control assembly, In-vehicle networking communication control unit is connected with central processing unit, crystal oscillating circuit provides the quartz crystal oscillator of 15M, reset circuit is provided with the reset button that central processing unit can be made to return original state, radio communication control assembly is used for carrying out data transmission with mobile phone A PP software, In-vehicle networking communication control unit is used for carrying out data transmission with the follow-up automobile electronic system that breaks, central processing unit is MC9S0DZ60 type central processing unit, described link is a kind of standard interface socket, for being connected with automobile OBD interface, the course of work of described vehicle-mounted interface equipment is carried out according to the following steps:

A1, by radio communication control assembly, receive the diagnostic command that mobile phone A PP software sends;

A2, parsing diagnostic command, if protocol configuration order, then configuration diagnostics protocol communication parameters, if diagnosis control order, then according to the requirement of diagnosing protocol messaging parameter, diagnosis request message diagnosis control order generated by In-vehicle networking communication control unit, sends to follow-up to break automobile electronic system;

A3, to be received follow-up by In-vehicle networking communication control unit and to break the diagnostic response result of automobile electronic system, and diagnostic response result is sent to mobile phone A PP software by radio communication control assembly.

8. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, it is characterized in that: described mobile phone A PP software comprises mobile network communication administration module, wireless communications management module and Subscriber Interface Module SIM, the course of work of described mobile phone A PP software is carried out according to the following steps:

B1, by Subscriber Interface Module SIM receive user diagnose request;

User diagnoses request to send to remote service center by mobile network by b2, mobile network communication administration module;

The diagnostic command of b3, reception remote service center, sends to vehicle-mounted interface equipment by wireless communications management module;

The diagnostic response result of b4, reception vehicle-mounted interface equipment, sends to remote service center by mobile network communication administration module;

The diagnostic result of b5, reception remote service center, feeds back to user by Subscriber Interface Module SIM.

9. a kind of vehicle failure remote diagnosis system based on mobile phone A PP according to claim 1, it is characterized in that: described remote service center comprises communication management module, vehicle administration module, diagnosis administration module and diagnostic personnel interface module, the diagnostic operation that diagnostic personnel interface module will be carried out for receiving diagnostic personnel, and diagnostic operation is submitted to diagnosis administration module; Vehicle administration module for managing vehicle information, comprise wait diagnose vehicle adopt diagnosing protocol, messaging parameter, support diagnosis service, diagnosis service form; Communication management module is used for setting up secure communications links with mobile phone A PP software, and the data be responsible between mobile phone A PP software are transmitted; The management of diagnosis management module in charge diagnostic procedure, comprises that user asks to confirm, diagnostic command issues, diagnostic response interpretation of result, diagnosis report generates; The course of work of described remote service center is carried out according to the following steps:

The diagnosis request that c1, reception mobile phone A PP software send;

C2, send protocol configuration order to mobile phone A PP software;

C3, send diagnosis control order to mobile phone A PP software;

C4, reception mobile phone A PP software send diagnostic response result;

C5, repeat c3 and c4, until diagnosis terminates;

C6, generation diagnosis report, send to mobile phone A PP software.