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Based aircraft life-saving equipment data acquisition system design and CAN bus transmission

Author: ZhouWei
Tutor: JiangLiPing
School: Nanjing University of Technology and Engineering
Course: Electronics and Communication Engineering
Keywords: TMS320F2812 Data acquisition FIR MATLAB CAN
CLC: TP274.2
Type: Master's thesis
Year: 2012
Downloads: 14
Quote: 0
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Abstract


The high-speed development of information technology makes data acquisition and processing has become an important technology , the emergence of the digital signal processor (DSP) to provide the possibility of real-time data acquisition and processing . DSP chip uses a Harvard architecture , real-time digital signal processing unique hardware architecture and instruction system quickly became the tool of choice for powerful data-processing capabilities make it widely used in communications . This article is based on the understanding of the structure, characteristics and performance of the Texas Instruments (TI) TMS320F2812 , according to the system specifications , the minimum system design requirements and the hardware circuit design considerations , such as design of peripheral circuits , including the power supply circuit , clock circuit , reset circuit , external expansion memory circuit , AD data acquisition front-end signal conditioning circuits and CAN bus communication circuit . The software part completed in CCS3.3 complete data acquisition, signal filtering and CAN bus transmission . Part of data acquisition is completed the acquisition of signal through the TMS320F2812 embedded 12 -bit ADC module , introduced the ADC module functions and features as well as the work given the realization of the flow chart of the AD converter and analysis produce AD sampling error given the software correction method . Digital filtering section including the parameters of the FIR low-pass filter design and implemented in hardware in the DSP . FIR digital filter design with MATLAB software to complete the window function design method , using fdatool tool designed to meet the requirements of the system indicators filter , filter coefficients . Two methods in CCS3.3 complete software development : The first one is directly to the filter coefficients loaded to CCS3.3 main program debugging trouble ; second filter coefficients alone appear in the form of a header file CCS3.3 . In this paper, the second method , simulation debugging simple , greatly shorten the development cycle of the DSP software . Data transmission in part by the CAN module . The adoption the TMS320F2812 comes eCAN module between the CAN bus and processor to increase the transceiver device is the TI's 3.3V SN65HVD230 converter to achieve . The software development CCS3.3 in , mainly including the overall system software design, CAN module initialization and CAN message is sent .

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