J1939 bus data recorder, component arrangement method and process flow
A J1939, data recorder technology, applied in time registers, instruments, registration/indication, etc., can solve problems such as inability to implement in-depth applications, file confusion, misleading data analysis, etc., to achieve convenient program upgrades and convenient use , The effect of reducing the cost of use and maintenance
Active Publication Date: 2017-07-07
SINO TRUK JINAN POWER
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Problems solved by technology
[0003] There are some CAN bus data loggers on the market, and some of them can also realize the recording of J1939 bus data, but most of them can only realize simple data recording, and cannot realize in-depth applications, such as the selection of data file format, data file configuration and Terminal resistance configuration and other functions
If the user cannot configure the name of the file independently, all recorded data will have the same file name (only one time can be used to distinguish), then when the recorder is changed to another car, there will be confusion in the file, which will be misleading data analysis
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[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] like figure 1 Shown, a kind of J1939 bus data logger based on OBD-II interface that the present invention provides, its hardware composition comprises master controller MCU, TF card (Trans-flash Card, flash memory card) interface circuit, CAN interface circuit, RTC (real time clock) module, watchdog circuit and power supply, each part is introduced in detail as follows:
[0025] (1) Main controller MCU
[0026] The main controller MCU of the present invention adopts STM32F103RET6 (hereinafter referred to as STM32) based on the Cortex-M3 (ie ARM-v7) core as the main control chip, which is responsible for realizing all functions of the recorder. The ARM chip has a maximum frequency of 72MHz, embedded with 512K Flash, 64K RAM and a large number of commonly used peripherals. The STM32 chip uses the latest version of the uCos-iii operating system (OS). This open s...
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The invention discloses a J1939 bus data recorder, which includes a main controller MCU, and the main controller MCU respectively reads J1939 data bus data and diagnostic CAN bus data of vehicles based on UDS protocol through two CAN interface circuits. The main controller MCU reads and writes the TF card through the TF card interface circuit, and the main controller MCU provides a clock signal by the RTC module. The main controller MCU is an STM32 chip and uses the uCos‑iii operating system. The invention also discloses a component arrangement method and a process flow of the J1939 bus data recorder, which can be widely used in J1939 bus data recording for commercial passenger cars and trucks for off-line analysis of vehicle bus data. The invention is very convenient to use, and can truly achieve plug and record, and the recorded data files can be opened by specific software for data analysis.
Description
technical field [0001] The invention relates to the technical field of data recorders, in particular to a portable, easy-to-use and configurable J1939 bus data recorder based on an OBD-II interface, a component arrangement method and a process flow. Background technique [0002] SAE J1939 (hereinafter referred to as J1939) is a recommended standard of the American Society of Automotive Engineers (SAE), which is used to provide a standard architecture for communication between electronic components on medium and heavy road vehicles. J1939 is based on the Controller Area Network (CAN: Controller Area Network) developed by Bosch Company in Germany, which can reach a communication rate of 250Kbps. Currently, J1939 is the most widely used CAN application layer protocol in commercial vehicles, ships, rail locomotives, agricultural machinery and large engines. [0003] There are some CAN bus data loggers on the market, and some of them can also realize the recording of J1939 bus d...
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IPC IPC(8): G07C5/00
Inventor 营健张静郭鹏王殿辉
Owner SINO TRUK JINAN POWER