Developed Based On Fpga And Microcontroller, High-precision Electronic Theodolite Optical Signal Processing Systems

The working principle, hardware and software design, anti-jamming technology, debugging process of the electric theodolite photoelectric signal processing system are presented in detail in this thesis. Base on the elementary hardware frame that already had, the hardware system is perfected and optimized according to the theodolite's design requirement. Acquisition and processing of the Moire Fringe grating signal are implemented. FPGA is designed to take count of the counting pulses and distinguish the direction by using a brand new digital subdivision technology. Also the software system of the single-chip microcomputer is finished. The software system calculates the value of angle ground on the arithmetic and brings it to display. All the functions of keystrokes are implemented according to the requirement. Everything that can avoid interference is taken to insure the precision of the equipment. Finally the thesis introduces the process of debugging. The system has proved by the test in Beijing that it does measure up to the qualification that the measuring precision of the theodolite is up to 2" and the precision of reading data reaches to 1".