equal precision frequency measurement

基本解释

A digital frequency meter designed by using equal precision measurement, have realized the frequency measurement.
利用等精度測量原理實現了頻率的測量。
This design uses FPGA chip and VHDL program to improve the stability of frequency detecting system and realize equal precision measurement of frequency, period, pulse width and duty ratio.
選用FPGA芯片通過VHDL編程實現，提高了測頻系統的穩定性，可實現頻率、周期、脈寬和佔空比的等精度測量。
A wetness measurement system based on cavity perturbation method is designed for precise measuring, including automatic frequency tracing system and equal precision frequency measurement system.
以汽輪機內蒸汽溼度的準確測量爲目的，設計了基於微波諧振腔微擾法的蒸汽溼度測量系統：自動頻率跟蹤系統和等精度頻率測量系統。