A 1553b bus monitoring system

Abstract

The invention discloses a 1553B bus monitoring system which comprises a 1553B bus isolation transformer, a 1553B bus transceiver and a programmable logic device. After a 1553B bus passes through the 1553B bus isolation transformer and the 1553B bus transceiver, a pair of logically complementary digital signals are output; filter shaping, code stream extraction and protocol analysis and processing are conducted on the input digital signals through the programmable logic device and extracted word information and timestamp information of the 1553B bus are written in a computer memory. With regard to normal 1553B bus transmission, all command word information, control word information, data word information and interval time information of the adjacent words can be monitored and recorded by the monitoring system, wherein the command word information, the control word information, the data word information and the interval time information of the adjacent words are transmitted on the 1553B bus. With regard to abnormal 1553B bus transmission, when a bus transmission abnormality occurs, a bus fault type, a fault occurrence time point and recorded position information when a fault occurs can be monitored and recorded by the monitoring system.

Description

Technical field [0001] The invention belongs to the field of communication and relates to a 1553B bus monitoring system. Background technique [0002] The 1553B bus has the advantages of high reliability, good real-time performance and easy expansion, and has been widely used in the aerospace field. By monitoring and recording the 1553B bus signal, the efficiency of system fault diagnosis can be effectively improved. [0003] At present, the 1553B bus monitor mainly adopts the technical implementation scheme based on the general 1553B bus controller chip (such as DDC's BU-61580 series device). The bus controller chip completes the 1553B bus transport layer protocol analysis, and provides analysis data to the monitoring device CPU. Due to the limitation of the functions of this type of controller chip, it is impossible to completely reproduce all the communication activities of the 1553B bus relying on the analytical data provided by the controller chip. For normal bus transmissi...

AI Technical Summary

Problems solved by technology

Due to the limitation of the function of this type of controller chip, it is impossible to completely reproduce all communication activities of the 1553B bus by relying on the analysis data provided by the controller chip

For normal bus transmission, this type of monitoring device cannot provide the interval time information of command word, control word and data word in bus frame transmission

For abnormal bus transmission, this type of monitoring device cannot provide detailed error information, such as the error type (synchronous header error, Manchester encoding error, checksum error, and response timeout), the time when the error occurred, and the time when the error occurred. Recorded bit information, etc.

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