System Of Signal Acquisition And Processing For Micro-spectrometer Based On ARM

Micro-spectrometer is fast, intuitionistic, real-time, online in the qualitative and quantitative analysis to material with the support of PC, but it is not convenient in outdoor, especially under field conditions. Micro-spectrometer realized by embedded technology with integration of signal acquisition, storage, processing and display, it has advantages of small, intelligent, portable, and there is a good prospect in special environment, such as field-testing, environmental monitoring, battlefield biochemical detection.This paper was based on the need of micro-portable and integrated spectrometer, on the basis of analysis in the domestic and international micro-spectrometer development status and trend, embedded system applied in the micro-spectrometer for the need of special environment was proposed, such as wild, battlefield. After overall structure of embedded micro-spectrometer was made, signal acquisition circuit and processing circuit based on ARM were designed for spectrometer, hardware of embedded micro-spectrometer was finished, operating systems and file system were established for providing advantages for exploitation and running of software of signal acquisition. The primary coverage is listed as following:①On the basis of a large amount reference and document, the spectrum instrument development tendency was analyzed. On this basis, the necessity of embedded spectrometer research was proposed.②On the basis of principle of micro-spectrometer, embedded spectrometer was studied, realization plan was made, and design of hardware was divided into two parts, CCD signal acquisition and embedded processing board.③CCD signal acquisition circuit was designed, with the technology of CPLD, all the digital circuit was integrated in one chip, the system miniaturization, stability, online modifying and upgrading the conditions were provided.④According to characteristic of CCD signal, embedded processing circuit was designed with the CPU of ARM9.⑤CCD drive circuit was simulated and tested, boot loader and operating systems and were established.