Two Dimensional Embed Photoelectric Autocollimator Based On CMOS Imager

Based on CCD imager, the present batch products of two dimensional photoelectricautocollimator have some disadvantages such as complicated driving circuit, low data andframe rate, low integrity, sophisticated system structure and high power consumption etc.Therefore, it is of great necessity to research and develop an advanced autocollimator basedon new photoelectronic converter and embedded processor.In this thesis, the author focuses on the engineer implement method of embed twodimensional photoelectric autocollimator based on CMOS imager and a new type of twodimensinal photoelectric autocollimator has been developed successfully.The focuses of the thesis are as follows:1. With CMOS imager as research subject and bases on the thorough analysis of the workprinciple and characteristic parameters of it, the total design scheme of embed twodimensional photoelectric autocollimator on CMOS imager is elaborated.2. Focusing on DSP and FPGA, Embed system hardware frame is designed and realized.The designed system utilizes parallel pipeline technology, so that the data acquisition,image pre-processed, object capture and image located can be fulfilled simultaneously.No frame buffer memory is required. The system work rate is 60 frames per second.3. One of characteristic of the photoelectric autocollimator in this thesis is embed frame andhigh integration. All digital signal process modules are fulfilled with a piece of FPGA.The main functions of this module are as follows:√Digital filtering and target capture can be done within one frame time.√FPGA and DSP share the same data memory which is mapped in data space of DSR√Char, image signal generator and digital vide comp modules are designed.√Bus switching logic is designed.4. One of the design originality in this thesis is that electrical ocular substitutes opticalocular. In addition, the electrical ocular can be used as electrical reticules.5. Traditional centroid arithmetic is improved. With the help of target capture module, thenew arithmetic is realized in DSP, which has self-adapting threshold. The calculatedquantity is small. 6. Based on precise rotating platform, a demarcating method is designed, simplifying thedemarcation and maintenance of the system and offering a solution for the universality ofsystem software.7. Based on analysis on the software function requirements, applied system software of DSPis. programmed. Through the combination of software and hardware, data auto-collectingand auto-dispose is realized.8. The theoretical analysis and experimental test of the new-style photoelectricalautocollimator's measuring precision are fulfilled, which proved that all technicalindicators of new autocollimator meet the design requirements.