FlexRay bus-based online network diagnosis device

A diagnostic device and bus technology, applied in the direction of bus network, data exchange network, data exchange through path configuration, etc., can solve problems such as failure to work normally, FlexRay network interference faults, etc.

Active Publication Date: 2014-12-10
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention can be integrated into the existing on-board controller, and can solve the problem that the FlexRay network is disturbed or fails to work normally

Method used

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  • FlexRay bus-based online network diagnosis device
  • FlexRay bus-based online network diagnosis device
  • FlexRay bus-based online network diagnosis device

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Embodiment Construction

[0023] figure 1 Shown is the overall structural block diagram of the network online diagnosis device of the present invention. The present invention takes the microprocessor MC9S12XF512 as the core. The microprocessor MC9S12XF512 integrates the FlexRay communication controller inside. Under the control of the embedded software of the microprocessor, the network online diagnosis device of the present invention collects the FlexRay network data, and completes the online diagnosis of the network. When the network is abnormal, the cause can be analyzed and the fault classification can be processed.

[0024] The invention includes a microprocessor, a FlexRay / CAN communication control circuit, a bus level measuring circuit, a microprocessor peripheral circuit composed of a voltage stabilizing circuit, a reset circuit, a clock circuit and a working instruction circuit.

[0025]The microprocessor U1 connects the two FlexRay transceiver chips AS8221U7 and U8 in the FlexRay / CAN commun...

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Abstract

A FlexRay bus-based online network diagnosis device comprises a microprocessor MC9S12XF512, a FlexRay bus interface connected with a FlexRay bus network, a CAN (controller area network) bus interface connected with a CAN bus network, and a bus level measuring circuit. The FlexRay bus-based online network diagnosis device allows the status of the FlexRay bus network to be monitored online. The FlexRay bus-based online network diagnosis device is characterized in that the microprocessor monitors data transmission in the FlexRay bus network; when a network anomaly occurs, a warning message is given out in time for fault grading and processing; normal intra-vehicle network communication is ensured. The FlexRay bus-based online network diagnosis device can be integrated to an existing vehicular controller; the problem that when the FlexRay network is interfered or fails, failure of the FlexRay network to normally operate affects vehicle running safety and reliability is solved.

Description

technical field [0001] The invention relates to a network online diagnosis device based on the FlexRay bus. Background technique [0002] With the rapid development of automotive electronics, the number of electronic control units included in powertrain systems and X-by-wire systems is increasing day by day, and the control functions are becoming more and more complex. requirements are getting higher and higher. In order to meet these demands, Daimler-Chrysler and BMW jointly proposed the FlexRay bus standard in 1999, which supports dual-channel redundant transmission, each channel can reach a transmission rate of up to 10Mbit / s, and supports bus, star, and hybrid. A topological structure, and has independent network fault-tolerant components, etc. In 2006, the FlexRay bus was first applied to a mass-produced car, and it was used as a data backbone in the suspension system of the BMW X5. [0003] Although the FlexRay bus has high speed and real-time performance, how to en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/40
Inventor 李芳王丽芳廖承林苏笑然
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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