基于CAN总线的振动测试系统设计
发布时间：2018-09-11 15:06
【摘要】：传统的振动测试系统存在着自动化水平低、可扩展性差、可靠性不强等问题，很难满足大型复杂机械装备多点振动监测的要求。CAN总线具有稳定性高、可靠性强等优点，在工业自动化领域中应用越来越广，基于CAN总线的系统设计逐渐成为该领域发展的一大趋势。本课题将CAN总线技术应用于振动测试系统，利用DSP处理器的实时数据处理能力设计了基于CAN总线的振动测试系统。本论文主要做了如下工作： 首先，介绍了CAN总线技术，论述了CAN总线的工作原理并详细分析了CAN总线协议，在此基础上，设计了基于CAN总线振动测试系统的整体框架。其次，采用TMS320F2812型号的DSP处理器，设计了满足系统要求的整体结构框架。该框架主要包括数据采集模块、信号调理模块、DSP最小系统模块、CAN通信模块。基于该框架重点设计了以下内容：①通过分析压电式加速度传感器的结构和工作原理并结合本课题的需求，选用ICP加速度传感器对振动信号进行采集，设计了ICP传感器的供电电路。②根据系统需要，选取主控制器芯片，分析并设计了系统供电电路，设计了以模拟开关（CD4051）和集成运算放大器（LM324）构成的信号调理电路。在分析CAN总线原理和协议的基础上，选取CAN收发器SN65HVD232D芯片，完成了通信硬件接口电路设计，实现了数据通信。③运用辅助软件Protel99SE完成了整个系统原理图的设计，并绘制了相应的PCB图。在CCS环境下，使用C语言编程，完成了A/D采样及CAN通信的软件编程，最后将数据传送至上位机。 基于CAN总线的测试系统易于扩展，稳定性高，使用及维护方便，实现了PC机和DSP之间数据的可靠、快速传输，本系统采用模块化结构设计，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.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB523;TP274
本文编号：2237044
[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.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB523;TP274
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