CN111277472A

CN111277472A - CAN network fault detection method for wheel type multipurpose engineering vehicle

Info

Publication number: CN111277472A
Application number: CN202010130549.8A
Authority: CN
Inventors: 农权; 谭林全; 方贵东; 李林; 杨忠祥
Original assignee: Guizhou Jonyang Kinetics Co Ltd
Current assignee: Guizhou Jonyang Kinetics Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-06-12

Abstract

The invention discloses a CAN network fault detection method for a wheeled multipurpose engineering vehicle, which is characterized in that a fault detection module is connected into a CAN bus, each module connected into the CAN bus sends out interactive data through the fault detection module, when one module does not send out normal data, the fault of the module is identified through the fault detection module, and the interactive data of all modules on the CAN bus are read at regular intervals. The CAN bus fault location monitoring system CAN monitor the communication condition of the CAN bus in real time, and CAN determine the fault location of the CAN network or eliminate the fault of the CAN network in the first time when the fault occurs.

Description

CAN network fault detection method for wheel type multipurpose engineering vehicle

Technical Field

The invention relates to CAN bus monitoring of a wheel type multipurpose engineering vehicle.

Background

CAN bus communication is more and more extensively used on engineering machinery equipment, has simplified electric system control circuit, has also brought some problems simultaneously: when CAN network faults occur in the operation process of engineering machinery equipment, the use of the equipment is often directly influenced, even the equipment stops working, and the fault reason CAN also be other faults, so that the content needing to be checked is added during fault checking by using a CAN bus, and different from the mechanical faults, professional port data detection software and equipment terminals are often needed for diagnosing the CAN network faults, and the whole CAN network is manually checked one by one.

At present, the wheel type multipurpose engineering vehicle manufacturers in China often adopt the method for processing the fault, and the requirement on the professional level of maintenance personnel is high. When the operator encounters the fault, the operator is often stranded and waits for professional maintenance personnel to check, and the use of the equipment is seriously influenced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in view of the above problems, the present invention aims to provide a control method for quickly diagnosing a CAN network fault point.

The technical scheme of the invention is as follows:

a fault detection module is connected into a CAN bus, each module connected into the CAN bus sends out interactive data through the fault detection module, and when one module does not send out normal data, the fault detection module identifies the module fault.

And reading the interactive data of all modules on the CAN bus at regular intervals.

The fault detection module is a color display instrument and displays faults in a picture and text mode.

Each module and its line are numbered in sequence, and when a fault is detected, the fault number is displayed.

And recording possible fault reasons and a suggested fault handling method of each number in the color display instrument, and calling the corresponding possible fault reasons and the suggested fault handling method for reference of an operator when a certain number fault is detected.

The module that connects on the CAN bus includes: 1 color display instrument, 3 controllers, 1 bar alarm, 2 power management modules and 2 operating handles.

The modules are communicated with each other through a CAN bus through a standard J1939 communication protocol.

The invention has the beneficial effects that:

the CAN bus fault location monitoring system CAN monitor the communication condition of the CAN bus in real time, and CAN determine the fault location of the CAN network or eliminate the fault of the CAN network in the first time when the fault occurs.

Drawings

Fig. 1 is a schematic diagram of a CAN bus connection structure according to the present invention.

Detailed Description

Example (b): the CAN bus connection module comprises: 1 color display instrument, 3 controllers, 1 bar alarm, 2 power management modules and 2 operating handles; the modules communicate with each other via CAN bus via standard J1939 communication protocol, as shown in FIG. 1

The color display instrument is a multi-interface display and respectively comprises: the display interface of the instrument, the video monitoring interface, the maintenance display interface, the fault display interface and the like is changed through buttons on a color display instrument panel.

This document only explains the fault display interface: the color display instrument reads data sent by all modules on the CAN bus; and providing relevant information of the fault detection result to an operator in a graphic and text mode, wherein the content comprises a fault position, a possible fault reason and a suggested fault processing method.

When CAN network fault occurs, the system informs operators of the specific position of the CAN fault, possible fault reasons and the suggested fault processing method through image-text display.

The whole working principle is as follows:

firstly, coding and grouping processing is carried out on each module and communication line according to the figure 1, which specifically comprises the following steps: the color display instrument and the communication line thereof are No. 1 coding units, the No. 1 controller and the communication line thereof are No. 2 coding units … …, and the like, the right operating handle and the communication line thereof are No. 9 coding units.

When the wheel type multipurpose engineering vehicle works normally, each coding unit receives and transmits interactive data through the CAN bus, and the color display instrument reads each group of coding unit data from the CAN bus, so that the current health state of the coding units is judged. The time interval for acquiring each set of coding unit data is set to 200 ms.

When the color display instrument fails to read normal data sent by a certain coding unit from the CAN bus, an operator is informed of the CAN network fault of the coding unit through image-text display, and the operator is asked to perform troubleshooting according to the steps of a fault troubleshooting page.

For example: when the color display instrument cannot read data sent by the 2# power management module from the CAN bus, an operator is informed of the CAN network fault of the No. 7 coding unit through image-text display, and the specific position of the No. 7 coding unit on the wheel type multipurpose engineering vehicle and how to perform examination are indicated. The operator only needs to check according to the steps of the fault checking page on the color display instrument.

Claims

1. A CAN network fault detection method for a wheel type multipurpose engineering vehicle is characterized by comprising the following steps: the CAN bus is connected with a fault detection module, each module connected in the CAN bus sends out interactive data through the fault detection module, and when one module does not send out normal data, the fault detection module identifies the module fault.

2. The CAN network fault detection method of the wheeled multipurpose engineering vehicle as claimed in claim 1, wherein: the fault detection module is a color display instrument and displays faults in a picture and text mode.

3. The CAN network fault detection method of the wheeled multi-purpose engineering vehicle as claimed in claim 2, wherein: each module and its line are numbered in sequence, and when a fault is detected, the fault number is displayed.

4. The CAN network fault detection method of the wheeled multi-purpose engineering vehicle as claimed in claim 3, wherein: and recording possible fault reasons and a suggested fault handling method of each number in the color display instrument, and calling the corresponding possible fault reasons and the suggested fault handling method for reference of an operator when a certain number fault is detected.

5. The CAN network fault detection method of the wheeled multi-purpose engineering vehicle as claimed in claim 3, wherein: the module that connects on the CAN bus includes: 1 color display instrument, 3 controllers, 1 bar alarm, 2 power management modules and 2 operating handles.

6. The CAN network fault detection method of the wheeled multipurpose engineering vehicle as claimed in claim 5, wherein: the modules are communicated with each other through a CAN bus through a standard J1939 communication protocol.

7. The CAN network fault detection method of the wheeled multipurpose engineering vehicle as claimed in any one of claims 1 to 6, wherein: and reading the interactive data of all modules on the CAN bus at regular intervals.