CN216846913U

CN216846913U - Test diagnosis device of vehicle-mounted entertainment system

Info

Publication number: CN216846913U
Application number: CN202123338239.4U
Authority: CN
Inventors: 白杨; 郑超; 王先明
Original assignee: FAW Volkswagen Automotive Co Ltd
Current assignee: FAW Volkswagen Automotive Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-28
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a vehicle diagnosis technical field, concretely relates to on-vehicle entertainment system's test diagnosis device includes MCU, Flash memory, RAM memory, EEPROM memory, first CAN communication module, second CAN communication module, LIN communication module, UART communication module, ethernet communication module. The MCU is adopted as a main control unit, and the Flash memory, the RAM memory, the EEPROM memory, the first CAN communication module, the second CAN communication module, the LIN communication module, the UART communication module and the Ethernet communication module are respectively connected with the MCU. The first CAN communication module, the LIN communication module and the Ethernet communication module are used for being in communication connection with a vehicle-mounted entertainment system, and the second CAN communication module and the UART communication module are used for being in communication connection with a PC. The utility model discloses a test diagnosis device's integrated level is high, the facilitate promotion.

Description

Test diagnosis device of vehicle-mounted entertainment system

Technical Field

The utility model relates to a vehicle diagnosis technical field, concretely relates to on-vehicle entertainment system's test diagnostic device.

Background

In order to meet the requirement of driving entertainment, the functions of the automobile information entertainment system are continuously expanded, so that the automobile entertainment system is more complex. Therefore, there is a need to develop effective testing and diagnostic tools for in-vehicle entertainment systems. At present, the integration level of a bench test and verification tool of an information entertainment system is low, and the professional requirement is high, so that the information entertainment system is not beneficial to popularization and use.

In view of the above-mentioned drawbacks, the authors of the present invention have finally obtained the present invention through long-term research and practice.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical defect, the utility model provides a vehicle-mounted entertainment system's test diagnosis device, the integrated level is high, facilitate promotion.

The utility model discloses a technical scheme lie in:

the test diagnosis device of the vehicle-mounted entertainment system comprises an MCU (microprogrammed control Unit), a Flash memory, an RAM (random Access memory) memory, an EEPROM (electrically erasable programmable read-Only memory), a first CAN (controller area network) communication module, a second CAN communication module, a LIN communication module, a UART (Universal asynchronous receiver/transmitter) communication module and an Ethernet communication module;

the Flash memory, the RAM memory, the EEPROM memory, the first CAN communication module, the second CAN communication module, the LIN communication module, the UART communication module and the Ethernet communication module are respectively connected with the MCU;

the first CAN communication module, the LIN communication module and the Ethernet communication module are used for being in communication connection with a vehicle-mounted entertainment system, and the second CAN communication module and the UART communication module are used for being in communication connection with a PC.

Further, the UART communication module is specifically an RS232 communication module.

Furthermore, the test diagnosis device also comprises an LCD display screen, and the LCD display screen is driven by an LCD digital RGB driving interface carried by the MCU.

Furthermore, the test diagnosis device also comprises an operation panel connected with the MCU, and the operation panel is used for simulating external signal input and issuing instructions to the tested vehicle-mounted entertainment system.

Furthermore, the CAN communication module and the LIN communication module are respectively provided with corresponding ESD protection units.

Further, EEPROM memory is used to store critical test data.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the test diagnosis device of the utility model provides three interfaces to communicate with the tested vehicle-mounted entertainment system so as to adapt to various vehicle types; three memories are carried to support real-time local storage and key data storage; two interfaces are provided to communicate with a PC, and a hardware foundation is established for remote testing and data sharing; a display screen and operator panel are provided to support portable manual testing. To sum up, the utility model discloses a test diagnosis device's integrated level is high, the facilitate promotion.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a test connection of a test diagnosis apparatus according to an embodiment of the present invention;

fig. 2 is a block diagram showing the structure of a test diagnosis device according to an embodiment of the present invention;

fig. 3 is a schematic view of the distribution of keys of the operation panel of the test diagnosis apparatus according to the embodiment of the present invention;

fig. 4 is a CAN/LIN communication block diagram of an embodiment of the present invention;

fig. 5 is a communication block diagram of a UART module according to an embodiment of the present invention;

fig. 6 is a connection block diagram of the LCD display and the MCU according to an embodiment of the present invention.

Detailed Description

The above and further features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

As shown in fig. 1, in the present embodiment, a test diagnosis device is provided, which provides three interfaces for communication with the in-vehicle entertainment system, namely, a CAN communication interface, a LIN communication interface, and an ethernet communication interface. In other words, the utility model discloses a test and diagnosis device CAN communicate with on-vehicle entertainment system through CAN bus LIN bus/ethernet to CAN acquire the entertainment system of its state data and diagnostic data, the various motorcycle types of adaptation.

Two interfaces are provided for communication with a PC, namely a CAN communication interface and a UART communication interface, and the preferred UART communication interface adopts an RS232 interface. In other words, the utility model discloses a test diagnosis device CAN communicate with the PC through CAN bus/UART serial data bus to build the basis for following function: the user can issue instructions such as test, control, diagnosis and the like to the tested vehicle-mounted entertainment system through the PC, test data can be synchronized to the PC, the user can check the test data through the PC, the PC can be connected to complete remote test, meanwhile, the PC is supported to update the device, and online upgrade and maintenance of software versions are achieved.

The test diagnosis device is provided with a human-computer interface for human-computer interaction operation, and a foundation is established for supporting portable manual test: a user can issue instructions such as test, control, diagnosis and the like to the tested vehicle-mounted entertainment system through a human-computer interface and check test data.

As shown in fig. 2, in a specific embodiment, the testing and diagnosing apparatus uses an MCU (micro control unit) as a main control unit, and is respectively connected to a Flash memory, a RAM memory, an EEPROM memory, a first CAN communication module, a second CAN communication module, a LIN communication module, an RS232 communication module, and an ethernet communication module. By carrying the Flash memory, the RAM memory and the EEPROM memory, the test data can be locally stored in real time, and the key test data can be stored in the EEPROM for backup. The first CAN communication module, the LIN communication module and the Ethernet communication module are used for being in communication connection with a vehicle-mounted entertainment system, and the second CAN communication module and the UART communication module are used for being in communication connection with a PC. Preferably, the MCU is further connected with an LED indicator light, a USB interface, a switch and a power module.

Referring to fig. 4, the CAN communication module and the LIN communication module adopt a transceiver circuit conforming to the specifications of the automobile network protocol and are both provided with corresponding ESD protection (electrostatic protection) measures, so that data communication and information sharing of various microcontrollers and various sensors CAN be supported. In the figure, EN is an enable signal indicating activation of a function, TXDL/RXDL are transmission/reception signals of a LIN bus, respectively, and TXDC/RXDC are transmission/reception signals of a CAN bus, respectively.

Referring to fig. 5, which is a communication block diagram of the UART module in an embodiment, the MCU is connected to the PC through the universal serial communication module RS232, so as to implement test control and communication of the test apparatus at the PC end, and simultaneously support the PC to update the test diagnosis apparatus, thereby implementing online upgrade and maintenance of the software version. In the figure, EN is an enable signal indicating activation of the function, and TX/RX is a transmission/reception signal of the RS232 bus.

Illustratively, the hardware architecture of the test diagnosis device can be used as a basis for realizing manual and automatic testing of a PC, for example, manual testing can be performed through switch simulation of the HMI of the PC, and test data is recorded and stored. The remote test and data sharing can be completed by connecting with a PC. Meanwhile, the script text can be supported to finish the automatic test and generate a test report.

Referring to fig. 2, 3 and 6, in an embodiment, the human-computer interface of the testing and diagnosing apparatus includes an operation panel and an LCD display screen with 5.6 inches TFT, which are respectively connected to the MCU, so that the testing and diagnosing apparatus can support portable manual testing, and keys are arranged on the operation panel, for example: ignition switch key, steering wheel switch key, gear switch key, lock simulation key, steering switch key and car light switch key. The external signal input is simulated through the keys, and the connection between a user and the device is established by utilizing an LCD display screen in order to display the relevant information of the tested vehicle-mounted entertainment system. Preferably, an LCD digital RGB driving interface carried by the MCU is utilized to drive a 5.6-inch TFT display screen. In fig. 6, EN is an enable signal indicating activation of a function; I2C is a communication signal, HYNC/VYNC/CLK is a line sync signal \ field sync signal \ clock signal of the video signal, respectively, and R, G, B (8:8:8) are image display signals.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative, not limiting. The utility model discloses in all can change to some extent structure and connected mode etc. of each part all be in the utility model discloses equal transform and the improvement of going on technical scheme's the basis all should not get rid of the utility model discloses an outside the protection scope.

Claims

1. A test diagnosis device of a vehicle-mounted entertainment system is characterized by comprising an MCU, a Flash memory, an RAM memory, an EEPROM memory, a first CAN communication module, a second CAN communication module, a LIN communication module, a UART communication module and an Ethernet communication module;

2. The test diagnosis apparatus of an in-vehicle entertainment system as claimed in claim 1, wherein the UART communication module is specifically an RS232 communication module.

3. The apparatus of claim 1, further comprising an LCD screen driven by the LCD digital RGB driver interface of the MCU.

4. The apparatus of claim 3, further comprising an operation panel connected to the MCU for simulating an external signal input to issue a command to the in-vehicle entertainment system under test.

5. The test diagnosis apparatus for an in-vehicle entertainment system according to claim 1, wherein the CAN communication module and the LIN communication module are provided with corresponding ESD protection units, respectively.

6. The test diagnostic apparatus for an in-vehicle entertainment system as recited in claim 1, wherein said EEPROM memory is used to store critical test data.