Miniaturization Frequency Modulation Photoelectric Identification Technology Based On Multispectral

Multispectral photoelectric identification technology could improve the ability of target recognition with the complementation of multiple band light source, which has following characteristics like frequency modulation, strong penetrability, safe and reliable, large information capacity, and the application prospect is very broad. In order to improve the adaptability and flexibility of multispectral photoelectric identification device for different type platforms, the development of a small size and high reliability based on the multispectral variable frequency modulation photoelectric identification device is very meaningful.LED light source and MEMS light source as key components of miniaturization multispectral photoelectric identification system, its characteristics would directly decide the system identification effect. According to the different features of this two kind of light sources, the I-V characteristics, P-I characteristics, spectral characteristics and modulation characteristics of them were tested. The electro-optical properties of these two kinds of light sources are analyzed, the relationship between the characteristics of the light source and the performance of the identification device is verified, and the optimum working parameters of the light source are determined. The overall design of the miniature multispectrum photoelectric identification device was completed, and the drive-control circuit and frequency-control circuit of it are mainly studied. Low pressure precision difference voltage regulator chip ADP3336 is used to drive multiple spectral light source, and a tiny microcontroller STC15F104 E is used to control a variety of spectrum light source by variable frequency, realize a variety of different spectrum light source of high precision, by which high efficiency variable frequency is drive. Finally, the frequency modulation characteristic of the light source is analyzed and studied, and a prototype of the micro multispectral frequencyconversion modulation photoelectric identification system is realized.The reliability and stability of this device is enhanced with the help of a kind of well designed packaging shell. The identification characteristics of this device is tested using night vision instrument with corresponding band and infrared range finder. The remote recognition and stroboscopic recognition of the device composed of LED light source and MEMS infrared light source are observed in day and night of different environment background. The results showed that the overall recognition performance is good, and has great significance for further optimization design and promotion of this kind of device.