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Cab signal system to optimize detection device

Author: LiuYong
Tutor: WangQiang
School: Harbin Institute of Technology
Course: Control Science and Engineering
Keywords: Tester S3C2410 Embedded Linux Driver Qtopia Core4.2.2
CLC: TP274
Type: Master's thesis
Year: 2009
Downloads: 30
Quote: 0
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Abstract


Cab signal system is important to ensure the safety of train operation facility at its factory and offline will be necessary testing. Based on the development cab signal system tester actual project design portable tester for the cab signal system provides easy operation of testing. Testers need to simulate ground signal device to the standard cab signal system to send signals. Standard cab signal system receives the signal, and after internal judgment, the corresponding indicator lights up to indicate the operation of the train. Cab signal system of the various lighting voltage and switching voltage up and down through the analog path back to the tester; cab signal system will also train running through the CAN bus back to the tester, the tester will return information CAN bus and analog channels comparing the detected information to determine whether the train is faulty. This paper studies how to complete implementation of the various functions of the tester and upgrade tester indicators. The tester based huaheng HHARM2410-K2 core board for development, the core board with S3C2410 processor and is equipped with SDRAM and FLASH. This paper details the project background and research status, and then clear the subject to complete the task. In the hardware circuit design section around the signal output path and the feedback path of two parts Details of the signal generating circuit, operational amplifier circuit, a power amplification circuit, the current acquisition circuit, filter circuit, CAN bus communication circuit, the lighting voltage acquisition circuit, which hardware circuits work together to ensure that the test instrument function is implemented. This topic widely used embedded Linux operating system, based on this paper describes how to build embedded Linux development platform, and then combined with the processor memory, I / O ports such as the allocation of resources to write a signal output channel driver, a variety of lighting voltage collection loop drive, the current feedback loop drives, data transmission virtual device drivers, etc., to achieve the effective control of the hardware circuit. Finally Qtopia Core 4.2.2 write an application GUI, combined with multi-thread mechanism to achieve non-GUI functionality, and ultimately all of the features and the test instrument to achieve significant performance improvements. This study is the tester uses a powerful ARM9 embedded processing cores and stable performance improvement of the Linux operating system. The tester stable performance, data processing speed, easy operation, easy to carry, embodies the advantages of embedded products, is a test cab signal system is a good choice.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system
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