测控技术
測控技術
측공기술
MEASUREMENT & CONTROL TECHNOLOGY
2001年
1期
8-10
,共3页
仝猛%陈明%黄平云%任萍%梁彦%范东远%陈秋
仝猛%陳明%黃平雲%任萍%樑彥%範東遠%陳鞦
동맹%진명%황평운%임평%량언%범동원%진추
互相关%傅立叶变换%相位差%流量计%信号处理
互相關%傅立葉變換%相位差%流量計%信號處理
호상관%부립협변환%상위차%류량계%신호처리
Coriolis质量流量计是一种高精度、适应范围很广的流量计，通过检测管子上两路振动信号的相位差，就可计算出流经管道的质量流量。分析了互相关滤波对相位的影响规律，采用Mathematica3.0仿真分析了互相关滤波提高相位差检测精度的效果。提出了采用互相关滤波技术和傅立叶变换提高信号信噪比和相位检测精度的方法。
Coriolis質量流量計是一種高精度、適應範圍很廣的流量計，通過檢測管子上兩路振動信號的相位差，就可計算齣流經管道的質量流量。分析瞭互相關濾波對相位的影響規律，採用Mathematica3.0倣真分析瞭互相關濾波提高相位差檢測精度的效果。提齣瞭採用互相關濾波技術和傅立葉變換提高信號信譟比和相位檢測精度的方法。
Coriolis질량류량계시일충고정도、괄응범위흔엄적류량계，통과검측관자상량로진동신호적상위차，취가계산출류경관도적질량류량。분석료호상관려파대상위적영향규률，채용Mathematica3.0방진분석료호상관려파제고상위차검측정도적효과。제출료채용호상관려파기술화부립협변환제고신호신조비화상위검측정도적방법。
Coriolis mass flowmeter is a precision flowmeter, which is able to handle an extensive range of applications and fluids, from fluids to gases.The mass flowrate is proportional to the phase difference of the two vibration signals detected from the vibrating tube of the meter,which fluid is passed through.A cross correlation method is presented to improve the phase detection precision,and thoroughly analyzes the laws between cross correlation and phase shift in theory.Then use Mathematica3.0 to simulate the cross correlation filtering of two vibration signals and compare the effects of the phase detection precision improvements.
