Study on the Instrument Detecting Water in Oil Based on the Optoacoustic Spectroscopy Technique

Optoacoustic spectroscopy detection is one of the newest detection methods. It can detect the weak-absorbed specimen with high-sensitivity. In this treatise, the technique is applied to detect the water quantity in oil. There are two spectral absorbing wave bands of water, so the innovation of this project lies in adopting laser sources with two different wave bands. This can effectively strengthen the signal intensity of optic acoustic effect and increase the rate of Signal-to-Noise. Adopting the ARM embedded-system to collect data can help to enormously reduce the hardware bulk of the instrument. This project has adopted the wavelet-analyzing method to fulfill the wave-filtering and noise-cleaning for the experiment result, established the mathematical model. It is proved that the detecting result is validity.