Design of Equal Precision Frequency Meter Based on Nios II

The equal precision frequency meter with FPGA is designed by control unit Nios Ⅱ in the system,which is su-pported by appropriate software and hardware resources,the system controls the synchronous door through FPGA so that the measured signal and standard signal can be measured synchronously at the real gate-time,so the equal precision measurement is realized and precision is improved.The frequency meter system based on Nios Ⅱ technology has features such as simplified hardware structure,stable and reliable performance,it can be achieved at custom-made applications flexibly.