Data support system for fuel cell city carriage

A fuel cell, city bus technology, applied in the registration/indication of vehicle operation, instruments, registration/indication, etc., can solve the problems of large data volume, increased cost, complicated design, etc., and achieves the effect of strong compatibility

Inactive Publication Date: 2009-02-18
TSINGHUA UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, for the fuel cell bus data support system, the above two schemes have certain defects
For the former solution, since the fuel cell controller has many tasks, and each task has high requirements for real-time performance, adding the data support system will occupy the CPU resources of the controller, thereby affecting the real-time performance of the main control task
However, the fuel cell bus data support system needs to record a large amount of data. If a separate processor is used, an external bus, dual-port RAM, analog quantity acquisition, etc. are required to obtain the stored data. The design is more complicated and will greatly increase the cost.

Method used

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  • Data support system for fuel cell city carriage
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Embodiment Construction

[0029] The data support system includes two modules, the time calendar module and the data storage module. Such as figure 1 For the system control structure diagram, two TPU units of the digital core MPC5xx are used as the module controller. Among them, TPUA controls the data storage module, and TPUB controls the time calendar module.

[0030] In the data storage module, the communication protocol between the SD card and the TPU is the SPI protocol, and the four ports of the TPUA are used to simulate the SPI protocol for communication. Since the digital core is a 5V power supply and signal system, and the SD card is a 3.3V power supply and signal system, a level conversion chip needs to be added between the two to convert the two level standards to ensure normal communication. At the same time, use a separate power chip to provide a 3.3V power supply system for the SD card. The CPU stores the data in the public RAM area that both the TPU and the CPU can access, that is, Par...

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Abstract

A data supporting system of a fuel cell city bus, is acceptable for collection and analysis of mass data, belonging to the technical field of fuel cell car, comprising a SCM including a TPU module, a CAN network, a level conversion chip, an SD card, a real-time clock; CAN interface of the SCM including a TPU module is connected with CAN network; TPUA port of the SCM including the TPU module is connected with a real-time clock; TPUB port the SCM including the TPU module is connected with a level conversion chip, which is connected with the SD card. The SCM is the one of MC 68HC series, MC68K series and MPC5xx series made by Freescale company. According to the invention, main control task is not affected, also extra control unit and data transmission are not designed, wherein quantity of record data is large, recording time is long, and the stored data are not covered before deriving the data, and compatibility is strong.

Description

technical field [0001] A data support system for a fuel cell city bus relates to the field of data recording and analysis, is especially suitable for the collection and analysis of a large amount of data, and belongs to the technical field of fuel cell vehicles. Background technique [0002] At present, the characteristics of fuel cells, especially high-power fuel cells for vehicles, are in the research and exploration stage, and a large amount of experimental data is still needed to analyze the characteristics of fuel cells. Although the fuel cell bench test can obtain the operating data of the fuel cell, the environment on the vehicle is very different from the environment in the laboratory. The characteristics of the fuel cell in the harsh environment of the vehicle cannot be observed in the laboratory. of. In addition, the laboratory cannot simulate the transient and complex working conditions of the real vehicle operation, as well as some special conditions encountered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C5/08
Inventor 胡明寅华剑锋林辛凡徐梁飞李建秋欧阳明高
Owner TSINGHUA UNIV
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