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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。
An optical signal detection method based on modular LabView is proposed. The experimental system based on this method consists of two parts: signal acquisition and data processing. The signal acquisition part converts the light intensity signal into the electric signal through the photodiode, and completes the signal processing of the optical signal by using the AD620, DAC089, SCM89, Collection. Data processing part of the main use of LabView software through the computer’s 9-pin serial port to obtain data from the signal acquisition part, and further processing of the data, the final output optical signal intensity with time curve. The proposed design makes full use of the computer’s powerful data processing capabilities, not only to achieve the maximum automatic detection of optical signals, but also simplifies the design of signal detection hardware system and enhances the system’s function.