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DSP-based real-time data acquisition and processing bearing system design

Author: ZengShuai
Tutor: ZhaoRongZhen
School: Lanzhou University of Technology
Course: Measuring Technology and Instruments
Keywords: DSP Rolling Wavelet Transform Troubleshooting
CLC: TH133.33
Type: Master's thesis
Year: 2009
Downloads: 157
Quote: 3
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Abstract


Rolling is the most used in rotating machinery , the most critical , but also the most vulnerable to damage one of the mechanical parts . Many rotating machinery fault with the state of rolling bearings , bearing good and bad working conditions of the machine greatly influenced . Therefore, real-time status of rolling bearing fault detection and diagnosis is very necessary . Recent years due to DSP (Digital Signal Processor) technology, the rapid development and maturation , the DSP technology into the rolling bearing condition monitoring and fault diagnosis become hot . In this paper, the signal processing DSP chip in the above advantages , the design of DSP as the core processor rolling real-time data acquisition and processing system that can quickly complete rolling data acquisition and signal processing to improve the efficiency of diagnosis and timeliness . In this paper, as follows: 1 ) Bearing Fault Diagnosis described the purpose and significance and international development profiles, the system used by the selected technical solutions ; 2 ) describes the theory of rolling bearing fault diagnosis , fault diagnosis of rolling bearing types , characteristics a comprehensive understanding of the signal processing system to determine the focus ; 3 ) study of wavelet transform in signal de-noising rolling bearing fault diagnosis of the application for fault signal characteristics , focusing on the selection of wavelet , wavelet decomposition level determination , wavelet threshold and threshold function to determine , on this basis, proposes a better simulation of the effect of the improved exponential threshold function . 4 ) For rolling bearing fault diagnosis system characteristics and requirements of the system 's hardware platform design is mainly based on TMS320C6713 DSP chip as the core processor, using CPLD (ComplexProgrammable Logic Device) for system control logic, which is important for the circuit a detailed description is given of the circuit diagram and system PCB (Printed Circuit Board) Fig . 5 ) For rolling bearing fault signal characteristics and the design of the hardware platform , complete system software design, including system setup and initialization , wavelet de-noising and FFT feature extraction process to achieve , DSP and CPLD 's bootstrap control logic procedures , and the experimental results .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Moving parts > Bearing > Rolling
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