CN102798833A - Automatic test system and method for diagnosis instrument - Google Patents

Abstract

The invention discloses an automatic test system for diagnostic instruments, which is used for testing various types of diagnostic instruments; the system includes: a main controller, in which diagnostic protocol data matching the diagnostic After the request data sent by the instrument, judge whether the request data is correct according to the diagnostic protocol data; if the request data is accurate, obtain the reply data corresponding to the request data according to the diagnostic protocol data, and send the reply The data is returned to the diagnostic instrument to be tested; if the requested data is inaccurate, the randomly generated data is used as reply data to return to the diagnostic instrument to be tested; a CAN transceiver is used for the main controller and the diagnostic instrument to be tested Data communication between diagnostic instruments; diagnostic instrument interface, connected to the CAN transceiver, used to communicate with the main controller and the diagnostic instrument under test; and a display screen, used to display the requested data or the Reply content corresponding to the above reply data.

Description

Automatic test system and method for diagnostic instrument

technical field

The invention relates to the field of automobiles, in particular to an automatic test system and method for a diagnostic instrument.

Background technique

Automobile diagnostic instrument plays an important role in automobile maintenance. Using this diagnostic instrument, the vehicle can be inspected without dismantling the vehicle to determine the fault location and cause. With more and more electrical appliances on the car, the functions of the corresponding car diagnostic instruments are becoming more and more complex, and the requirements for the accuracy and real-time performance of the car diagnostic instruments are also getting higher and higher. In order to ensure the accuracy of the automotive diagnostic instrument, the research and development and testing of the diagnostic instrument will become more and more meticulous. It will consume a lot of manpower and time to rely on traditional real vehicles to test the various functions of the diagnostic instrument.

Therefore, an intelligent testing system is needed to reduce the time required for testing the diagnostic instrument and the manpower and material resources consumed.

Contents of the invention

On the one hand, the present invention provides an automatic test system for diagnostic instruments, which can test various types of diagnostic instruments, and after the diagnostic instrument is upgraded, only the software part of the automatic test system can be upgraded to diagnose the upgraded diagnostic instrument. The instrument can be used for testing, which can greatly reduce the manpower and material resources required for testing the diagnostic instrument.

The diagnostic instrument automatic test system includes:

The main controller is preset with diagnostic protocol data matching the diagnostic instrument to be tested; after receiving the request data sent by the diagnostic instrument, judge whether the request data is correct according to the diagnostic protocol data; if the request data is accurate , then obtain reply data corresponding to the request data according to the diagnostic protocol data, and return the reply data to the diagnostic instrument under test; if the request data is inaccurate, use randomly generated data as reply data to return to the diagnostic instrument under test;

CAN transceiver, used for data communication between the main controller and the diagnostic instrument under test;

A diagnostic instrument interface, connected to the CAN transceiver, for connecting the main controller and the diagnostic instrument under test;

Display screen, if the request data is inaccurate, display the request data; if the request data is accurate, display the reply content obtained by parsing the reply data, for parsing the reply data with the diagnostic instrument under test Then, the analysis content obtained is compared to test the analysis function of the diagnostic instrument under test.

Furthermore, the system also includes:

A data storage key, connected to the main controller, when the data storage key is pressed, the main controller stores the request data received from the diagnostic instrument under test; and

The reset key is connected with the main controller, so that the user can selectively clear the request data stored in the main controller.

The system may also include:

Setting an interface for data interaction between the main controller and the host computer, so that the diagnostic protocol data is written into the main controller through the host computer or the request data stored in the main controller is read .

A start key, connected with the main controller, is used to start the system.

The power module is used to supply power to the test system.

On the other hand, the present invention also provides an automatic testing method for diagnostic instruments, which is used for testing various types of diagnostic instruments. The method comprises the steps of:

Connecting the diagnostic instrument to be tested with the master controller preset with diagnostic protocol data matching the diagnostic instrument to be tested;

The main controller receives request data from the diagnostic instrument to be tested; judges whether the request data is accurate according to the diagnostic protocol data;

If the request data is accurate, obtain reply data corresponding to the request data according to the diagnosis protocol data, and return the reply data to the diagnostic instrument to be tested; if the request data is inaccurate, use random The generated data is returned to the diagnostic instrument under test as reply data;

If the request data is inaccurate, then display the request data; if the request data is accurate, display the reply content after the reply data analysis on the main controller to be tested, and diagnose The instrument displays the analysis content after the analysis of the reply data, and compares the reply content with the analysis content to judge whether the analysis function of the diagnostic instrument under test is accurate.

Further, the method also includes:

the master controller stores the received request data; and

Optionally delete the request data stored in the main controller.

The method may further include: writing the diagnosis protocol data into the main controller through an upper computer; and reading the request data stored in the main controller through the upper computer.

By utilizing the diagnostic instrument automatic testing system provided by the invention, the automobile diagnostic instrument can be tested better and faster, and the testing efficiency can be guaranteed.

Description of drawings

Fig. 1 shows the structural representation of the diagnostic instrument automatic test system provided by the present invention;

Fig. 2 shows the working flow chart of the automatic testing method of the diagnostic instrument provided by the present invention.

Detailed ways

The diagnostic instrument automatic test system provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As a preferred embodiment of the present invention, as shown in Figure 1, the system includes:

The main controller is preset with diagnostic protocol data matching the diagnostic instrument to be tested; after receiving the request data sent by the diagnostic instrument, it judges whether the request data is correct according to the diagnostic protocol data; if the request data is accurate, Then obtain the reply data corresponding to the request data according to the diagnostic protocol data, and return the reply data to the diagnostic instrument to be tested; if the request data is inaccurate, use randomly generated data as reply data to return to The diagnostic instrument to be tested;

CAN transceiver, used for data communication between the main controller and the diagnostic instrument under test;

A diagnostic instrument interface, connected to the CAN transceiver, for connecting the main controller and the diagnostic instrument under test;

Display screen, if the request data is inaccurate, display the request data; if the request data is accurate, display the reply content obtained by parsing the reply data, for parsing the reply data with the diagnostic instrument under test Then, the analysis content obtained is compared to test the analysis function of the diagnostic instrument under test.

By presetting the diagnosis protocol data in the automatic test system, the vehicle environment under various working conditions can be simulated, a test environment can be constructed, and the diagnostic instrument can be tested comprehensively. The diagnostic instrument automatic test system judges the accuracy of the request data by comparing the request data sent by the diagnostic instrument with the standard data corresponding to the request data in the diagnostic protocol data, and can judge the accuracy of the data sent by the diagnostic instrument. After the automatic test system of the diagnostic instrument sends the reply data to the diagnostic instrument, the reply content after the analysis of the reply data is displayed on the display screen, and the diagnostic instrument under test performs data analysis after receiving the reply data, and the reply The reply content corresponding to the data is displayed on the screen of the diagnostic instrument itself, and whether the content displayed on the screen of the diagnostic instrument is manually compared with the content displayed on the display screen is the same, if they are the same, it means that the analytical data of the diagnostic instrument to be tested is accurate , otherwise it means that the diagnostic instrument under test parses the data incorrectly.

Furthermore, the system also includes:

A data storage key, connected to the main controller, when the data storage key is pressed, the main controller stores the request data received from the diagnostic instrument under test; and

The reset key is connected with the main controller, so that the user can selectively clear the request data stored in the main controller.

The system also includes:

Set the interface for data interaction with the host computer. Specifically, data can be written into the main controller through the host computer, for example, diagnostic protocol data can be written into the main controller through the host computer. When the diagnostic protocol data is changed, it is only necessary to use the host computer to write new diagnostic protocol data into the main controller so that the main controller can obtain the latest version of the diagnostic protocol data. In addition, diagnostic protocol data of multiple vehicle types or multiple versions can be written into the main controller, so that the automatic diagnostic instrument test system can test various diagnostic instruments, and the generality of the diagnostic automatic test system can be improved. sex. On the other hand, the request data stored in the main controller may also be read through the setting interface, so as to further analyze and process the request data.

The diagnostic instrument automatic test system can cover the diagnostic functions of various diagnostic instruments, and can judge whether the functions of the diagnostic instrument, such as version information, data flow, fault code reading, fault code clearing, action test, and data analysis, are correct. In the actual testing process, the user can choose to test some or all functions of the diagnostic instrument. Compared with using a real vehicle or separately developing a test controller for each type of diagnostic instrument in the prior art, the diagnostic instrument automatic test system provided by the present invention has stronger versatility.

As another preferred embodiment of the present invention, the workflow diagram of the automatic testing method of the diagnostic instrument is shown in Figure 2, including the following steps:

Step 101, connecting the diagnostic instrument to be tested with a master controller preset with diagnostic protocol data matching the diagnostic instrument to be tested;

Step 102, the main controller receives the request data from the diagnostic instrument under test;

Step 103, judging whether the request data is accurate according to the diagnostic protocol data; if the request data is accurate, proceed to step 104, otherwise proceed to step 105;

Step 104, obtain reply data corresponding to the request data according to the diagnosis protocol data, and return the reply data to the diagnostic instrument under test; then proceed to step 106;

Step 105, using randomly generated data as reply data to return to the diagnostic instrument under test, and then proceed to step 107;

Step 106, the request data is accurate, display the reply content after the analysis of the reply data on the main controller, and display the analysis content of the analysis of the reply data on the diagnostic instrument under test; then continue with the steps 108: By comparing the reply content and the analysis content, it can be judged whether the analysis function of the diagnostic instrument under test is accurate;

Step 107, the request data is inaccurate, and the request data is displayed on the main controller;

Step 108, judging whether the test has been completely finished, if not then continue to step 102, if yes then continue to step 109;

Step 109, end.

Further, the method may also include:

The main controller stores the received request data; and optionally deletes the request data stored in the main controller.

Writing the diagnosis protocol data into the main controller through the host computer; and reading the request data stored in the main controller through the host computer.

By setting the diagnostic protocol data corresponding to various diagnostic instruments in the main controller, various diagnostic instruments can be tested; by reading the request data stored in the main controller, the request can be further The data is analyzed in order to find out why the requested data is wrong.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the protection scope of the present invention. Those skilled in the art may make modifications or equivalent replacements to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. A diagnostic instrument automatic test system for testing various types of diagnostic instruments; the system includes: The main controller is preset with diagnostic protocol data matching the diagnostic instrument to be tested; after receiving the request data sent by the diagnostic instrument, judge whether the request data is correct according to the diagnostic protocol data; if the request data is accurate , then obtain reply data corresponding to the request data according to the diagnostic protocol data, and return the reply data to the diagnostic instrument under test; if the request data is inaccurate, use randomly generated data as reply data to return to the diagnostic instrument under test; CAN transceiver, used for data communication between the main controller and the diagnostic instrument under test; A diagnostic instrument interface, connected to the CAN transceiver, for connecting the main controller and the diagnostic instrument under test; Display screen, if the request data is inaccurate, display the request data; if the request data is accurate, display the reply content obtained by parsing the reply data, for parsing the reply data with the diagnostic instrument under test Then, the analysis content obtained is compared to test the analysis function of the diagnostic instrument under test. 2. The diagnostic instrument automatic test system according to claim 1, wherein the system further comprises: A data storage key, connected to the main controller, when the data storage key is pressed, the main controller stores the request data received from the diagnostic instrument under test; and The reset key is connected with the main controller, so that the user can selectively clear the request data stored in the main controller. 3. diagnostic instrument automatic test system according to claim 2, is characterized in that, described system also comprises: Setting an interface for data interaction between the main controller and the host computer, so that the diagnostic protocol data is written into the main controller through the host computer or the request data stored in the main controller is read . 4. The diagnostic instrument automatic test system according to claim 1, wherein the system further comprises: A start key, connected with the main controller, is used to start the system. 5. diagnostic instrument automatic test system according to claim 4, is characterized in that, described system also comprises: The power module is used to supply power to the test system. 6. A diagnostic instrument automatic testing method for testing various types of diagnostic instruments; the method comprises the steps of: Connecting the diagnostic instrument to be tested with the master controller preset with diagnostic protocol data matching the diagnostic instrument to be tested; The main controller receives request data from the diagnostic instrument to be tested; judges whether the request data is accurate according to the diagnostic protocol data; If the request data is accurate, obtain reply data corresponding to the request data according to the diagnosis protocol data, and return the reply data to the diagnostic instrument to be tested; if the request data is inaccurate, use random The generated data is returned to the diagnostic instrument under test as reply data; If the request data is inaccurate, then display the request data; if the request data is accurate, display the reply content after the reply data analysis on the main controller to be tested, and diagnose The instrument displays the analysis content after the analysis of the reply data, and compares the reply content with the analysis content to judge whether the analysis function of the diagnostic instrument under test is accurate. 7. The diagnostic instrument automatic testing method according to claim 6, is characterized in that, described method also comprises: the master controller stores the received request data; and Optionally delete the request data stored in the main controller. 8. The diagnostic instrument automatic testing method according to claim 7, characterized in that, the diagnostic protocol data is written into the main controller by a host computer; and Reading the request data stored in the main controller through a host computer.

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