equal precision frequency measurement

基本解釋

A digital frequency meter designed by using equal precision measurement, have realized the frequency measurement.
利用等精度測(cè)量原理實(shí)現(xiàn)了頻率的測(cè)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(shí)現(xiàn)，提高了測(cè)頻系統(tǒng)的穩(wěn)定性，可實(shí)現(xiàn)頻率、周期、脈寬和佔(zhàn)空比的等精度測(cè)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(jī)內(nèi)蒸汽溼度的準(zhǔn)確測(cè)量爲(wèi)目的，設(shè)計(jì)了基於微波諧振腔微擾法的蒸汽溼度測(cè)量系統(tǒng)：自動(dòng)頻率跟蹤系統(tǒng)和等精度頻率測(cè)量系統(tǒng)。