基于labview的振动信号采集的设计

南京工程学院

本科毕业设计（论文）

题目：基于LabVIEW的振动信号

采集处理系统设计

专业：车辆工程（车辆电子电气）

班级：车电气101学号：********* 学生姓名：***

指导教师：王书林副教授

起迄日期：2014.3～2014.6

设计地点：车辆工程实验中心

Graduation Design (Thesis)

A LabVIEW-based Vibration Data Acquisition and Signal

Processing System Design

By

GONG XUWEI

Supervised By

Assoc. Prof. WANG Shulin

Department of Vehicle Engineering

Nanjing Institute of Technology

June2014

摘要

仪器的技术、计算机的技术、总线的技术和软件的技术是由虚拟仪器构成并将它们紧密的联系在一起，仪器的极大一部分的功能是依靠计算机数据处理能力，不再需要传统仪器繁琐的结构，形成的一种新的仪器模式。

如今的虚拟仪器技术还存在许多的弱点。首先，部分检测系统任处于相对比较落后的状态，将各种示波器连接至计算机。通过一些繁琐的步骤对示波器的波形进行各种调整，有时候还需要同时显示多个波形时，需要连接多个示波器。其工作不仅复杂，而且控件占用率也比较高。在企业中，这也大大提高了企业的运营成本，在研究项目的过程中也会出现各种麻烦的步骤。同时，现有的虚拟仪器技术也是仅仅停留在数据采集、数据分析的单独步骤上，没有将两者很好的结合在一起。在系统运行的过程中，两者是独立分开工作的，增加了数据分析结果的时间，对应的工作效率也有所降低。

本设计采用了NI PCI-6024E采集卡进行数据采集，运用相关的虚拟技术知识将数据采集到电脑中，再用Labview软件设计的振动信号采集系统对采集卡所传来的数据信号进行存储、调整、显示波形、数据分析等一系列工作。同时在Labview软件的显示界面上对电机转速进行调整，调整的信号通过采集卡反馈到变频器，再通过调整变频器电压值，实现对电机的调速，以此形成了一个完整的循环过程。

本设计是虚拟仪器在测控领域的一次成功尝试。该系统将电机转速控制、数据采集、采集数据实时显示、在线分析、存储及离线分析等功能进行有机的结合在一起，形成了一个完整的整体。本设计大大简化了振动信号采集的过程，将多个工作同时进行，缩短了分析的时间，波形显示也对应变得明朗清晰。

关键词：虚拟仪器；数据采集；采集卡；LabVIEW

ABSTRACT

Instrument technology, computer technology, and software technology bus is constituted by the virtual instrument close contact with them, a great part of the function is to rely on the computer apparatus data processing capability, eliminating the need for cumbersome traditional instruments structure formation of a new model of the instrument.

Today, there are many virtual instrument technology weaknesses. First, any part of the detection system is relatively backward state, various oscilloscope connected to the computer. By some tedious steps to make various adjustments oscilloscope waveforms, and sometimes also need to simultaneously display multiple waveforms, you need to connect multiple oscilloscope. Its work is not only complex, but also relatively high occupancy rate controls. In business, it also greatly increases the cost of doing business, in the course of research projects in a variety of troublesome step will appear. Meanwhile, the existing virtual instrument technology is merely data collection, data analysis on a single step, without the good combination of both. During the system operation, the two independent working separately, increasing the time for analysis of data, the corresponding efficiency is decreased.

This design uses the NI PCI-6024E data acquisition card collecting, using virtual technology-related knowledge will collect data to your computer, then Labview software design vibration signal acquisition system for collecting data from the card to store the signal, adjust waveform display, data analysis and a series of work. Labview software simultaneously on the display screen to adjust the speed of the motor to adjust the feedback signal to the inverter via capture card, and then by adjusting the voltage value of the inverter, the motor speed to achieve it, thus forming a complete cycle.

This design is a virtual instrument in the field of measurement and control a successful attempt. The system will motor speed control, data acquisition, real-time display of data acquisition, online analysis, storage and offline analysis features such as organically combine together to form a complete whole. This design greatly simplifies the process of vibration signal acquisition, multiple work simultaneously, reducing the analysis time waveform display also corresponds became clear clarity.

Key words:Virtual instrument; Data collection; Acquisition card; LabVIEW