虚拟仪器的信号生成与模入模出系统

The System of Signal Generation and Analogy I/O in the Virtual Instrument

针对法兰连接结构动态测试试验,以嵌入式控制器和数据采集卡为主要硬件,虚拟仪器LabVIEW为软件开发平台,设计出了具有信号生成、信号输出与数据采集功能的系统。该系统模拟产生频率可调的伪随机和简谐(正弦)激励,并输出信号以此来激励振动台,再通过板卡采集法兰结构振动时的声发射与加速度信息,从而为法兰的状态识别提供依据。经过测试与应用,该系统能运行正常,功能可靠,为以后进行数据分析与处理奠定了很好的基础,达到了设计的要求。

Aiming at the vibration measurement and experimental of Structure Connection of the Flange,the embedded controllers and data acquisition card are considered of the main hardware,through the application of the Virtual Instrument LabVIEW software,a system of signal generation,signal output and data acquisition is designed.Which simulates to generate a pseudorandom with adjustable frequency and sinusoidal signal,the vibration table is excited by output signal,and then collected acoustic emission and acceleration data,through the vibration of the flange,which can provide the basis so as to identify the state of flange.After testing and application,the system will be able to run normally and is functional reliability,the data analyzing and processing for the future has been laid a good foundation and met the design requirements.