Abstract: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.
