發(fā)布時(shí)間：2018-09-11 15:06

【摘要】：傳統(tǒng)的振動(dòng)測(cè)試系統(tǒng)存在著自動(dòng)化水平低、可擴(kuò)展性差、可靠性不強(qiáng)等問(wèn)題，很難滿足大型復(fù)雜機(jī)械裝備多點(diǎn)振動(dòng)監(jiān)測(cè)的要求。CAN總線具有穩(wěn)定性高、可靠性強(qiáng)等優(yōu)點(diǎn)，在工業(yè)自動(dòng)化領(lǐng)域中應(yīng)用越來(lái)越廣，基于CAN總線的系統(tǒng)設(shè)計(jì)逐漸成為該領(lǐng)域發(fā)展的一大趨勢(shì)。本課題將CAN總線技術(shù)應(yīng)用于振動(dòng)測(cè)試系統(tǒng)，利用DSP處理器的實(shí)時(shí)數(shù)據(jù)處理能力設(shè)計(jì)了基于CAN總線的振動(dòng)測(cè)試系統(tǒng)。本論文主要做了如下工作： 首先，介紹了CAN總線技術(shù)，論述了CAN總線的工作原理并詳細(xì)分析了CAN總線協(xié)議，在此基礎(chǔ)上，設(shè)計(jì)了基于CAN總線振動(dòng)測(cè)試系統(tǒng)的整體框架。其次，采用TMS320F2812型號(hào)的DSP處理器，設(shè)計(jì)了滿足系統(tǒng)要求的整體結(jié)構(gòu)框架。該框架主要包括數(shù)據(jù)采集模塊、信號(hào)調(diào)理模塊、DSP最小系統(tǒng)模塊、CAN通信模塊�；谠摽蚣苤攸c(diǎn)設(shè)計(jì)了以下內(nèi)容：①通過(guò)分析壓電式加速度傳感器的結(jié)構(gòu)和工作原理并結(jié)合本課題的需求，選用ICP加速度傳感器對(duì)振動(dòng)信號(hào)進(jìn)行采集，設(shè)計(jì)了ICP傳感器的供電電路。②根據(jù)系統(tǒng)需要，選取主控制器芯片，分析并設(shè)計(jì)了系統(tǒng)供電電路，設(shè)計(jì)了以模擬開關(guān)（CD4051）和集成運(yùn)算放大器（LM324）構(gòu)成的信號(hào)調(diào)理電路。在分析CAN總線原理和協(xié)議的基礎(chǔ)上，選取CAN收發(fā)器SN65HVD232D芯片，完成了通信硬件接口電路設(shè)計(jì)，實(shí)現(xiàn)了數(shù)據(jù)通信。③運(yùn)用輔助軟件Protel99SE完成了整個(gè)系統(tǒng)原理圖的設(shè)計(jì)，并繪制了相應(yīng)的PCB圖。在CCS環(huán)境下，使用C語(yǔ)言編程，完成了A/D采樣及CAN通信的軟件編程，最后將數(shù)據(jù)傳送至上位機(jī)。 基于CAN總線的測(cè)試系統(tǒng)易于擴(kuò)展，穩(wěn)定性高，使用及維護(hù)方便，實(shí)現(xiàn)了PC機(jī)和DSP之間數(shù)據(jù)的可靠、快速傳輸，本系統(tǒng)采用模塊化結(jié)構(gòu)設(shè)計(jì)，具有一定的通用性。
[Abstract]:The traditional vibration testing system has some problems, such as low automation level, poor expansibility and low reliability. It is difficult to meet the requirements of multi-point vibration monitoring of large and complex mechanical equipment. Can bus has the advantages of high stability and high reliability. System design based on CAN bus is becoming a trend in industrial automation field. In this paper, the CAN bus technology is applied to the vibration testing system, and the vibration testing system based on CAN bus is designed by using the real time data processing ability of DSP processor. The main work of this thesis is as follows: firstly, the CAN bus technology is introduced, the working principle of CAN bus is discussed and the protocol of CAN bus is analyzed in detail. The whole frame of vibration testing system based on CAN bus is designed. Secondly, the DSP processor of TMS320F2812 model is used to design the whole frame to meet the requirements of the system. The framework mainly includes data acquisition module, signal conditioning module and DSP minimum system module and can communication module. Based on this framework, the following contents are designed: 1. By analyzing the structure and working principle of piezoelectric accelerometer and combining the demand of this subject, ICP acceleration sensor is selected to collect vibration signal. The power supply circuit of ICP sensor is designed. 2. According to the need of the system, the main controller chip is selected, the power supply circuit of the system is analyzed and designed, and the signal conditioning circuit composed of analog switch (CD4051) and integrated operational amplifier (LM324) is designed. On the basis of analyzing the principle and protocol of CAN bus, the CAN transceiver SN65HVD232D chip is selected to complete the design of communication hardware interface circuit, and the design of the whole system schematic diagram is realized by using the auxiliary software Protel99SE. The corresponding PCB diagram is drawn. In the environment of CCS, C language is used to program the A- / D sampling and CAN communication software. Finally, the data is transmitted to the upper computer. The test system based on CAN bus is easy to expand, has high stability, is easy to use and maintain, and realizes the reliable and fast data transmission between PC and DSP. The system is designed with modularized structure and has certain generality.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB523;TP274

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