Method and device for Zigbee technology-based FlexRay bus test and optimization

A technology for bus testing and optimization methods, which is applied to bus networks, data exchange through path configuration, digital transmission systems, etc. It can improve the quality and reliability of bus transmission, improve bus transmission efficiency, and reduce bus packet error rate.

Inactive Publication Date: 2014-12-24
CHONGQING UNIV
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Problems solved by technology

However, at present, the entire automotive industry lacks engineering experience in FlexRay network applications, and also lacks methods and means for comprehensive evaluation of FlexRay network performance, resulting in the high packet error rate of the FlexRay bus in complex networks.
[0003] At present, the test method for the FlexRay network bus is u

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  • Method and device for Zigbee technology-based FlexRay bus test and optimization
  • Method and device for Zigbee technology-based FlexRay bus test and optimization
  • Method and device for Zigbee technology-based FlexRay bus test and optimization

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[0043] Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0044] figure 1 It is the overall framework diagram of the present invention. The FlexRay bus test and optimization device based on ZigBee technology includes a PC, a ZigBee module, and a FlexRay bus test node. The FlexRay bus test node includes ZigBee module, programmable clock chip, digital potentiometer and MCU microprocessor; in this embodiment, FlexRay bus node 1, FlexRay bus node 2, and FlexRay bus node n constitute the FlexRay network, and the tested FlexRay Bus connection.

[0045] The PC is connected to the ZigBee module through the serial port; the PC is connected to the FlexRay bus test node through the ZigBee module to form a ZigBee wireless networking, the PC sends the network configuration parameters of each node to the FlexRay bus test node through the ZigBee module, and each FlexRay bus test node passes ZigBee The module...

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Abstract

The invention relates to a method and a device for Zigbee technology-based FlexRay bus test and optimization. The device comprises a PC, a Zigbee module and a FlexRay bus test node, wherein the FlexRay bus test node comprises a Zigbee module, a programmable clock chip, a digital potentiometer and an MCU microprocessor. According to the method and the device disclosed by the invention, the state of a FlexRay bus is detected and controlled in real time by applying a Zigbee technology, the programmable clock chip and the digital potentiometer are utilized for adjusting a transmission frequency and a matching impedance, reducing the packet error rate of the bus, improving the transmission quality and the reliability of the bus, and increasing the transmission efficiency of the bus; the method and the device are capable of realizing automatic assessment, test and parameter optimization for the performances of the FlexRay bus, and capable of giving the optimal impedance matching reference value of each node, thus improving the reliability of the data transmission of the FlexRay bus.

Description

technical field [0001] The invention belongs to the field of electronic technology testing, and relates to a method and device for testing and optimizing a FlexRay bus based on ZigBee technology. Background technique [0002] FlexRay is a high-speed serial communication, time-triggered network protocol compatible with event-triggered. The network formed by using the FlexRay protocol is mainly used in the active air suspension system and some all-electric braking systems of advanced vehicles. In these systems, the FlexRay network collects the physical information of each suspension or wheel of the car, and then summarizes it to the suspension control electronic control unit (ECU) or the braking system ECU. The system sends control commands. Each ECU node in the FlexRay network controls the operation of various functional components of the car, which is of great significance to improving the operability, safety and intelligence of the car. However, at present, the entire au...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/40
Inventor 王平杜炜李娜李刚健程娜潘震龚志辉王思奇
Owner CHONGQING UNIV
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