Research on signal processing of a precise photoelectric angle measuring system

This paper introduces a research on signal processing of a precision photoelectric angle measuring system, and some key issues of the problem are also discussed and analyzed in detail. The basic principle of this measuring method is introduced in this paper. In order to avoid low frequency noise (such as generation recombination noise and 1/f noise), we choose to modulate the light source so that we can analyze the useful information in a high frequency domain. By using the data acquisition system (based on DSP and FPGA) to gather multiplex data, we can realize data-transmitting with network in a high speed. Writing algorithm by Lab VIEW software in the data processing, we can eventually gain the angle. Prototype test shows that this method can completely meet the system requirements for the measuring system.