基于LabView的新型模块化信号检测方法

提出了一种基于模块化的LabView的光信号检测方法。基于该方法的实验系统由信号采集和数据处理两大部分组成。信号采集部分通过光电二极管将光强信号转换为电信号,利用放大器(AD620)、数模转换器(ADC0809)、单片机(AT89S51)、电平转换器(MAX232)和计算机(PC)完成对光信号的采集。数据处理部分主要利用LabView软件通过计算机的9针串口从信号采集部分获取数据,并对该数据进行进一步处理,最后输出光信号强度随时间变化的曲线。提出的设计方案充分利用了计算机强大的数据处理能力,不仅最大程度地实现了光信号的自动检测,而且简化了信号检测硬件系统的设计,提升了系统的功能。

Novel Modularized Optical Signal Detection Method Based on LabView

The optical signal detection system based on Labview, which consists of signal detecting part and data analyzing part, is presented. The signal collecting part contains of photosensitive diode, amplifier (AD620), analog-to-digital converter (ADC0809), single-chip (AT89S51), level shifter (MAX232), personal computer (PC) and some other components. The detected analog signal is transformed into the digital signal, and the communication interface can transmit the digital signal from the single-chip to the computer. Then for the data analyzing part, LabVIEW in PC first gets the signal data, then it makes analysis and processing on the signal, and finally the time-dependent curve of optical signal intensity is output. Making full use of the data handling capacity of PC, not only self detection of optical signal is realized at a maximum degree, but also the design of signal detecting system is greatly simplified.