The Design Of Multi-channel Optic-electronic Signal Acquisition And Processing System

Accompanied by the rapid development of electronic technology and informationtechnology, the data acquisition system has been widely used in such as industrialapplications, defense technology, scientific research and other fields. With the extensiveapplication of the acquisition system, the demand for precision of data acquisition, thenumber of channels, the amount of data is also increasing. Based on the project requirementof model identification shells within the multi-channel closed magazine, a Multi-ChannelOptic-Electronic Signal Acquisition and Processing System based on FPGA and DSP isdesigned and implemented in the dissertation, which can do digital acquisition and signalprocessing to analog signal of64-channel Optic-Electronic distance sensor, and displayrecognition result of model shells in real-time through the TFT LCD.First of all, on the basis of the analysis of the topic source and the development of bothdomestic and overseas acquisition technology, through the comparison of pros and cons oftraditional multi-channel acquisition system with the single chip processor as the core, themulti-channel acquisition and processing system with the FPGA+DSP as the core has beenchosen., which is faster, more stable performance and the advantages of better scalability.According to the basic principles of data acquisition and design requirements, the overalldesign idea of the system and the key of components are proposed. Secondly, hardwarecircuit including control module circuit of multi-channel signal acquisition, DSP peripheral,power circuit and TFT LCD interface circuit has been designed, and FPGA communicateswith DSP through the interface of a dual-port RAM. Then, the software design of systemadopts modular on the platform of hardware system, with controlling unit to generate timesequence by FPGA and processing of FIR low-pass filter by DSP. Finally, the identificationresults of64-channel shells will be displayed in real time by TFT LCD screen.The dissertation introduces the hardware and software system in detail, and does a complete system testing and results analysis which is through the CCS3.3software in realtime after the various parts of module debugging right. The test results show that the systemcan acquire and process the analog signal of64-channel Optic-Electronic distance sensor, anddisplay the types of shells in real time.