Recording and storing device of multichannel CAN bus data

Abstract

The invention discloses a recording and storing device of multichannel CAN bus data. The recording and storing device of the multichannel CAN bus data includes an FPGA controller, a DSP controller, a multichannel bus receiving and transmitting circuit, an external plug connector, a data storage circuit and a power source circuit, wherein the FPGA controller is connected with the DSP controller, the multichannel bus receiving and transmitting circuit and the data storage circuit separately; the external plug connector is connected to the multichannel bus receiving and transmitting circuit and the power source circuit separately; the power source circuit is composed of a power source switching circuit, a power failure detection circuit and a capacitive energy storage circuit. According to the recording and storing device of the multichannel CAN bus data, when the storage device is powered off, the CAN bus data can be completely recorded and reliable outage can be achieved immediately to ensure the integrity of CAN bus data records and protect a memory chip at the same time, so that the recording and storing device has the advantages of being excellent in data recording reliability, large in storage capacity, long in recording time, capable of preventing data loss during full load running and the like.

Description

technical field [0001] The invention relates to the technical field of bus data storage, more specifically, the invention is a multi-channel CAN bus data recording and storage device. Background technique [0002] At present, in order to maintain and improve the availability of space launch equipment, the space launch equipment system itself is required to have the ability to monitor and evaluate its health status, so as to achieve the goals of reliability, availability and economic affordability in the whole life cycle. , the concepts of fault prediction and health management are introduced into the field of equipment. Fault prediction and health management systems need to analyze various data information and use various intelligent reasoning algorithms to evaluate the health status of the system itself. Therefore, the premise of realizing fault prediction and health management is to record the bus data interacted between system devices when the system is running, and obta...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the existing CAN bus data storage devices, such as slow transmission speed, poor reliability, and easy damage in unexpected situations such as power failure, the present invention innovatively develops a multi-channel CAN bus data recording and storage device, based on DSP+FPGA Architecture, combined with multi-channel bus transceiver circuit and power supply circuit, thus realizing the high-speed storage of multi-channel CAN bus data, and improving the power-off reliability and service life of the storage device

[0007] Based on the frame structure of DSP+FPGA, the present invention can record multi-channel CAN bus data at the same time, and solve the problems such as few CAN bus channels, slow transmission speed and poor reliability of traditional CAN bus data recording and storage devices; The power-down detection circuit that monitors whether the power signal is power-down and the capacitive energy storage circuit used to provide data buffer power support after power-down, so as to solve the problem that the traditional CAN bus data recording storage device is easily damaged in unexpected situations such as power-off, Improve the reliability of the present invention

Images