Research On Ultraviolet And Visible Spectrum Instrutment In Biological Cabin

Space life science research makes high requirement on laboratory equipment. Due to special environment of space life science experiments, it requires that laboratory equipment has small size, low power consumption, light weight, high reliability, and automation characters. General Spectroscopy hardly has the above-mentioned characteristics of space science experiments. This article describes micro-UV-visible light spectrometer which has a small size, light weight, low power consumption; the use of CAN2.0b port to exchange information with the system, spectrometer and space biology interface module for the future for Chinese future development scientific experiments in the UV-VIS spectroscopy equipment in space station is introduced.In this context, the subject research on basic optical principles about micro spectrometer and summarize the optical micro-spectrometer system design and the methods of mechanical design. On this basis, we take advance on overall system optimization design method, resulting in optical structure, mechanical architecture, hardware and software system design to improve the system accuracy and reasonableness, and developed spectrometer which is based on plane grating micro-grating and supporting hardware and software systems. High stability of the overall system performance, choosing different types of grating makes the system cover the wavelength range from 200 to 1100 nm. The data is captured by CCD with FPGA and then sended to ARM by serial port, computed by ARM, and sended with can bus protocol to main contronller.At last display imaging spectrometer data on panel.The subject completes mainly structures of optical spectrometer, FPGA captures linear array CCD, ARM data processing, and CAN bus communication software development and hardware design accordingly. The software mainly includes: FPGA control timing of the AD9824; ARM communicates with FPGA; ARM communicates with main controller equipment by CAN protocol; the spectrum data storage and algorithm processing on ARM.The paper includes the following:1) The Micro spectrometer optical system design and implementation. Selected crossing-structure of an asymmetric Czerny-Turner spectrometer as the basic micro-optical structure, and design parameters of the optical element material. Optimized measured data based on a variety of experimental results.2) FPGA control timing of the AD9824 to complete the line array CCD data acquisition. AD9824 chip choice of mode and timing required for their work and to study the linear array CCD drive timing, control all devices, and access the analog data.3) ARM communication with the FPGA by serial, and establish communication protocol, ARM use serial FIFO communication mode, After FPGA received from ARM acquisition command, complete related actions, and translate data into the ARM board. 4) ARM completes its acquisition of data storage and processing, and complete communication with main controller, and received control commands issued from the main equipment, and translate the curve of the data to the LCD driver module into at the same time.