CN202267865U

CN202267865U - Vehicle-mounted fault detection and forecast device based on controller area network-local interconnect network (CAN-LIN) bus

Info

Publication number: CN202267865U
Application number: CN2011203552744U
Authority: CN
Inventors: 卢迪; 李东滨; 刘建新
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2011-09-21
Filing date: 2011-09-21
Publication date: 2012-06-06
Anticipated expiration: 2021-09-21

Abstract

The utility model relates to a vehicle-mounted fault detection and forecast device based on a controller area network-local interconnect network (CAN-LIN) bus. The existing vehicle-mounted control system has a self diagnosis function, but the control system can only inform drivers about fault occurrence of vehicles in a mode of sparkling fault indicating lamps, so that the drivers can not timely know positions where the faults occur in the vehicles. The vehicle-mounted fault detection and forecast device comprises a core processor (1) which is respectively connected with a procedure storage (2), a data storage (3), a liquid crystal touch screen (4), a universal serial bus (USB) port (5), a serial port level switch chip (6) and a CAN controller (7), the CAN controller is connected with a CAN transceiver (8) which is respectively connected with a CAN port (9) and a CAN-LIN transition module (10), the CAN-LIN transition module (10) is connected with an LIN bus (11), and the serial port level switch chip is connected with a serial port recommend standard 232 (RS232) (12). The vehicle-mounted fault detection and forecast device based on the CAN-LIN bus is used for detecting and forecasting the vehicle-mounted faults.

Description

Based on bus vehicle mounted fault detect of CAN-LIN and predictor

Technical field:

the utility model relates to a kind of based on bus vehicle mounted fault detect of CAN-LIN and predictor, belongs to vehicle mounted failure and detects and the forecast field.

Background technology:

Owing to Hyundai Motor electronization degree improves day by day, Vehicle Electronic Control equipment is on the increase, and makes complete vehicle structure increasingly sophisticated , thereby has increased fault detect and diagnosis difficulty.Though vehicle control syetem has self-diagnostic function; But only can break down with the form driver vehicle of malfunction indicator lamp flicker; Concrete failure diagnosis information with the stored in form of fault diagnosis code in storer; Need read in the maintenance station through specialized equipments such as failure diagnostic apparatus, cause human pilot can not in time understand the vehicle position of breaking down.

CAN is a controller local area network, is the serial communication protocol of ISO International standardization, is one of most widely used fieldbus in the world.The CAN bus has high reliability and good error detection capability, is widely used in the industrial environment that Computer Controlled System for Vehicle and environment are abominable, electromagnetic interference (EMI) is strong.But because of its cost higher; In not needing CAN bus width and multi-functional occasion; In the communication between switch door, seat, temperature control, cooling fan of engine, intelligence sensor/actuator, use the LIN bus to reduce cost greatly.LIN is a kind of low-cost serial communication network, can realize distributed electronic system control in the automobile, mainly to existing automobile bus such as CAN bus subsidiary function is provided.

publication number is vehicle-mounted malfunction notification apparatus and the vehicle-mounted malfunction notification method of CN101541568; Only the communication failure between sensor and the receiver in the vehicle tyre air pressure detection system is judged, relied on still that pilot lamp is lighted or the said fault of notice vehicle operators of glimmering takes place.

publication No. be CN101799686 a kind of onboard diagnostic system with external diagnosis equipment through the CAN bus link to each other with car body controller the completion communication, car body controller is converted into LIN bus request message with the CAN bus request message that receives and sends to from node device; The LIN response message that sends from node is converted into the CAN response message through car body controller and sends to external diagnosis equipment, so this onboard diagnostic system has just been accomplished the conversion of the communication protocol between CAN bus and the LIN bus.

notification number is that the hybrid vehicle vehicle-mounted fault diagnosis system based on CANopen of CN201820127U links to each other with vehicle-mounted CAN open network diagnose interface with information acquisition module; Obtain failure message, and show malfunction indicator lamp, failure message and detect data in real time through LCD MODULE.This system can only show the failure message that has taken place, and can not be according to the generation that detects the data prediction fault.

Summary of the invention:

The purpose of the utility model is that the problem that is directed against above-mentioned existence combines CAN bus and LIN bus; Provide a kind of based on bus vehicle mounted fault detect of CAN-LIN and predictor; Obtain to detect data through vehicle-mounted CAN-LIN bus; Use intelligent algorithm to detecting data processing, calculate the probability that fault takes place, provide fault pre-alarming.

Above-mentioned purpose realizes through following technical scheme:

are based on bus vehicle mounted fault detect of CAN-LIN and predictor; Its composition comprises: core processor; Described core processor is linker storer, data-carrier store, liquid crystal touch screen, USB interface, serial ports level transferring chip and CAN controller respectively; Described CAN controller connects the CAN transceiver; Described CAN transceiver connects CAN interface and CAN-LIN modular converter respectively, and described CAN-LIN modular converter connects the LIN bus, and described serial ports level transferring chip connects serial ports RS232.

are described based on bus vehicle mounted fault detect of CAN-LIN and predictor, and described core processor adopts ARM9 embedded microprocessor S3C2440.

Beneficial effect:

1, the utility model can directly show the fault happening part with textual form according to the DTC of CAN bus transfer on LCD;

2, can be according to the detection data of CAN-LIN bus transfer, calculate the fault probability of happening, provide fault pre-alarming.

3, CAN interface are the parts that system and other ECU of automobile communicate, and system obtains the data of each sensor through the CAN interface from other ECU of automobile, and the system of giving handles then.The CAN-LIN modular converter is mainly accomplished translation function, and the LIN bus data in the automobile is converted into the CAN bus data, system can be applied to have on the automobile of CAN bus and LIN bus.

Description of drawings:

accompanying drawing 1 is the structural representation of the utility model.

accompanying drawing 2 is circuit theory diagrams of liquid crystal touch screen in the utility model.

accompanying drawing 3 is circuit theory diagrams of serial ports level transferring chip in the utility model.

accompanying drawing 4 is circuit theory diagrams of CAN controller in the utility model.

Embodiment:

Embodiment 1:

are based on bus vehicle mounted fault detect of CAN-LIN and predictor; Its composition comprises: core processor 1; Described core processor is linker storer 2, data-carrier store 3, liquid crystal touch screen 4, USB interface 5, serial ports level transferring chip 6 and CAN controller 7 respectively; Described CAN controller connects CAN transceiver 8; Described CAN transceiver connects CAN interface 9 and CAN-LIN modular converter 10 respectively, and described CAN-LIN modular converter connects LIN bus 11, and described serial ports level transferring chip connects serial ports RS232 (piece number 12).

Embodiment 2:

It is main control chip that Samsung S3C2440 is adopted in master control, analyzes the message data that the CAN interface transmits, if fault-signal, the liquor charging crystal display shows, stores failure message into memory module simultaneously.

The data that need handle when the main storage system of data-carrier store is moved; Program storage then is mainly used in data such as the code, program, file of storage system operation; The USB memory device is extendible memory device, is used to store data and the usefulness of doing expansion with user interactions.

liquid crystal touch screen is topmost Man Machine Interface.Through liquid crystal touch screen, the user can see the running status of system at any time, and system gives user's various informations.Liquid crystal touch screen is that the user carries out interface operable to equipment, cooperates liquid crystal touch screen, can accomplish a lot of operations.

USB is used to connect the USB memory device, can the form of data with file be saved on the USB memory device.

Claims

1. one kind based on bus vehicle mounted fault detect of CAN-LIN and predictor; Its composition comprises: core processor; It is characterized in that: described core processor is linker storer, data-carrier store, liquid crystal touch screen, USB interface, serial ports level transferring chip and CAN controller respectively; Described CAN controller connects the CAN transceiver; Described CAN transceiver connects CAN interface and CAN-LIN modular converter respectively, and described CAN-LIN modular converter connects the LIN bus, and described serial ports level transferring chip connects serial ports RS232.

2. according to claim 1 based on bus vehicle mounted fault detect of CAN-LIN and predictor, it is characterized in that: described core processor adopts ARM9 embedded microprocessor S3C2440.