A monitoring system of can bus on the star based on single-chip microcomputer

Abstract

The invention discloses a satellite CAN (controller area network) bus monitoring system based on a single chip microcomputer. The satellite CAN bus monitoring system comprises a single chip microcomputer controller, a bus interface module, a time module, a power supply module and a storage module, wherein the satellite CAN bus monitoring system adopts a lithium battery for supplying the power. Compared with the prior art, the satellite CAN bus monitoring system has the advantages that the commercial power interference is avoided, the safety and the stability in the testing process are improved, a power supply module system adopts the dual redundancy design, the thermal switching of the power supply battery is automatically realized according to requirements, the data flow information loss because of data monitoring interruption caused by battery replacement cannot occur, the satellite CAN bus monitoring system is provided with the high-stability time module, the timing precision reaches 0.1ms, and the time accuracy of the recorded bus data is ensured, so data analysis by test personnel is faster. The satellite CAN bus monitoring system has the advantages that the storage module adopts the dual redundancy SD card design, the thermal switching of data storage can be realized, and the CAN bus data can be conveniently inquired in real time.

Description

technical field [0001] The invention relates to a CAN bus monitoring system, in particular to an on-board CAN bus monitoring system based on a single-chip microcomputer system, belonging to a data flow monitoring system applied to a satellite data bus network. Background technique [0002] The satellite data bus system is a channel for information exchange between satellite subsystems. In the domestic small satellite design, the bus system on the star adopts the CAN bus network. In the satellite test link, the data flow information passing through the bus plays an irreplaceable role in analyzing and locating system faults and finding hidden dangers. The bus monitoring system thus came into being. At present, in all levels of testing of small satellites, the bus monitoring system used is implemented in the form of CAN transition box + computer. The system consists of figure 1 As shown, the system obtains the data of the CAN bus network on the star through the CAN transfer...

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention: overcome the deficiencies in the prior art, provide a kind of on-star CAN bus monitoring system based on single-chip microcomputer, this system has solved the problem of the bus data flow monitoring in the small satellite test process at present, has improved CAN bus The data integrity and portability of the monitoring system reduce the interference of the mains power to the satellite network during the small satellite test process, and improve the safety and stability of the small satellite test process

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