Hardware Circuit Design Of Near Infrared Micro Spectrometer Based On FPGA

In recent decades,NIR spectroscopy technology has been greatly developed,and on this basis,various NIR spectroscopy instruments have been derived.Because of its unique advantages of qualitative and quantitative detection,it is widely used in agricultural production,food safety,petrochemical industry,national security and other fields.However,traditional near-infrared spectroscopy instruments have problems of large size,high power consumption,and high price,which limit their application environment.The emergence of MEMS technology has greatly optimized the optical structure of nearinfrared spectroscopy instruments,enabling the miniaturization of near-infrared spectroscopy instruments.At present,the cost of domestically produced miniature nearinfrared spectroscopy instruments is relatively high,so it is particularly important to develop a cost-effective near-infrared spectroscopy.This subject studied the near-infrared spectrum analysis technology,completed the systematic design of the near-infrared spectrum analysis technology,developed a highspeed,high-precision data acquisition system,and designed and developed a nearinfrared spectrometer based on the research and development of the project team.Multifunctional,high-performance near-infrared micro-spectrometer and near-infrared spectroscopy detection,the main research content and results of the paper are summarized as follows:1.Introduces the research background of this subject,analyzes the significance of NIR spectrometer research,and on this basis,expounds the types and development status of miniature spectrometers at home and abroad in recent years.2.Introduce the basic principles of spectrometer and NIR spectroscopy,the specific steps and advantages of NIR spectroscopy.3.The overall framework of the detection system is built,and the integrated design concept of integrated data collaborative processing is realized by adopting the hardware architecture of FPGA+ARM.In consideration of the application of near-infrared microspectrometer and the price of components,Gowin GW1 N series FPGA chip,Hamamatsu C14384 MA CMOS photodetector device,ADCO LTC2368 CMS AD conversion device and STMicroelectronics STM32 series micro processor.The driver circuit design of C14384 MA was completed step by step,and the driver circuit of LTC2368 CMS was designed based on the output signal analysis of CMOS device.FPGA configuration circuit and clock circuit design.The minimum circuit system of the microprocessor and its external equipment design.Design of power circuit of FPGA system.4.Develop and design FPGA based on GOWIN software,including: drive module,analog front-end interface module,data storage and processing module and control module.Using Verilog language to write source files to design drive pulse timing,ModelSim(Questa Sim)and other software for simulation,and finally generate resource reports through Synplify pro software.5.Download the FPGA configuration file to the FPGA chip for board-level verification,and verify the functionality of the spectrometer system by detecting the soybean spectrum,and achieve the miniaturization of the spectrometer.