Sensor Technology Research Using Laser To Detect The Composition Of Milk

Milk is a nutrient-rich and comprehensive food, accurately detection for milk constituents has aroused widespread concern.Fat and protein content in milk are important in decision of the quality of milk, so milk quality testing mainly focus on the two indicators.The commonly used methods of detecting milk composition are chemical analysis, mid-infrared spectroscopy, ultrasonic detection and near-infrared spectroscopy method. However, the detecting cycle of chemical analysis is too long, and it is difficult for rapid detection. In recent years, the ultrasonic measurement and near-infrared spectrographic method made progress in the filed of milk detecting. But, those instrumentations based on these methods are higher prices and larger. Therefore, to design a low-cost, high speed detector of the milk ingredients detection method becomes urgent.Light scattered technology is a multidisciplinary integ rated technology.It has a non-destructive, fast tracking the process of system changes.By the theoretical study of light scattering,we determine the light-scattering technology, and use san permeability ratio of laser to detect the milk ingredients.and use laser-sensing technology to detect the milk ingredients.In this paper, as laser-sensing technology research needs, an experimental device has been designed to complete the study. And also design the hardware and software of function modules that will use in a corresponding of laser sensor in the testing process. The points are experimental device platform design and light intensity signal detection processing module.Finally, the paper further improves the experimental device by experiments. And fat and protein were used to experiment to compare with the standard values to verify that the studied laser detection sensor technology can be applied to detection of milk fat and protein.