电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2011年
15期
9-12
,共4页
波形抽样法%相位测量%模数转换器%幅相误差
波形抽樣法%相位測量%模數轉換器%幅相誤差
파형추양법%상위측량%모수전환기%폭상오차
waveform sampling method%phase measurement%analog to digital converter%amplitude and phase error
由于高速模数转换器的出现,使得波形抽样法测量相位差成为可能。这种测相技术与传统的测相技术相比最大的优势是对输入信号的频率范围无要求,对于低频段和高频段的信号均可以实现精确测量,且没有幅相误差。针对波形抽样法测相提出了4种算法实现方案,并通过试验对每种方案进行验证,分析了其可行性和优缺点,得出了测相精度。试验表明,每种方案均能高效的实现测相功能,但测量结果的精度受其硬件电路和软件时序的影响而有所不同。
由于高速模數轉換器的齣現,使得波形抽樣法測量相位差成為可能。這種測相技術與傳統的測相技術相比最大的優勢是對輸入信號的頻率範圍無要求,對于低頻段和高頻段的信號均可以實現精確測量,且沒有幅相誤差。針對波形抽樣法測相提齣瞭4種算法實現方案,併通過試驗對每種方案進行驗證,分析瞭其可行性和優缺點,得齣瞭測相精度。試驗錶明,每種方案均能高效的實現測相功能,但測量結果的精度受其硬件電路和軟件時序的影響而有所不同。
유우고속모수전환기적출현,사득파형추양법측량상위차성위가능。저충측상기술여전통적측상기술상비최대적우세시대수입신호적빈솔범위무요구,대우저빈단화고빈단적신호균가이실현정학측량,차몰유폭상오차。침대파형추양법측상제출료4충산법실현방안,병통과시험대매충방안진행험증,분석료기가행성화우결점,득출료측상정도。시험표명,매충방안균능고효적실현측상공능,단측량결과적정도수기경건전로화연건시서적영향이유소불동。
Due to the emergence of high-speed adc sampling method,waveform sampling method for measuring the phase difference becomes possible.the biggest advantage of this technology than traditional test phase technology is that the frequency range of the input signal no request for low frequency and high frequency signals,all can achieve precise measurement,and no amplitude and phase error.Aiming at the waveform sampling method in measurement puts forward four kinds of solutions,and realizing algorithm of each method through experiments verify the feasibility,analyzes the advantages and disadvantages of the measurement precision,it is concluded that the phase.Experiment shows that each method are the realization of high efficiency measure phase function,but the accuracy of measurement results by the hardware circuit and software timing influence and different.
