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    PROCÉDÉ ÉLECTRONIQUE D'EXTRACTION DE L'AMPLITUDE ET DE LA PHASE D'UN SIGNAL DANS UNE DÉTECTION SYNCHRONE ET MONTAGE INTERFÉROMÉTRIQUE POUR LA MISE EN OEUVRE DU PROCÉDÉ
    1.
    发明公开
    PROCÉDÉ ÉLECTRONIQUE D'EXTRACTION DE L'AMPLITUDE ET DE LA PHASE D'UN SIGNAL DANS UNE DÉTECTION SYNCHRONE ET MONTAGE INTERFÉROMÉTRIQUE POUR LA MISE EN OEUVRE DU PROCÉDÉ 审中-公开
    振幅提取和相位的信号的在实现方法同步检测和干涉测量安排电子方法

    公开(公告)号：EP3044697A1

    公开(公告)日：2016-07-20

    申请号：EP14784277.7

    申请日：2014-09-10

    申请人： Université de Technologie de Troyes

    发明人： BRUYANT, Aurélien ,  VAILLANT, Julien ,  AL MOHTAR, Abeer

    IPC分类号： G06F17/10 ,  G01J9/02 ,  G01B9/02

    CPC分类号： G01J9/02 ,  G01B9/02002 ,  G01B9/02041 ,  G06F17/10

    摘要： The invention concerns an electronic method for extracting the amplitude Es and the phase φε of an electrical signal in synchronous detection, the signal containing a modulated part lmod of the form lmod ∝ Es f(t)*cos(ϕs -ϕR(t)),, in which ϕR(t) and f(t) are two known temporal modulation functions. The method comprises the following steps: -multiplying the signal with two reference signals C(t) and S(t) constructed from ϕR(t) and f(t); -integrating the resulting signals during a period tint; -determining the amplitude and the phase of said signal from quantities X and Y resulting from the preceding integration operations. The method is characterised in that: -said signal is multiplied by two orthogonal signals C and S that can be decomposed on the same set of frequencies as those present in lmod; f(t) is periodic or constant during integration period tint; ϕR(t) is periodic during integration period tint; and X and Y are linked to Es*cos(ϕs) and Es*sin(ϕs) by two calculated proportionality coefficients. The invention concerns the interferometric assemblies for implementing the above method, and the execution of same using analogue components, circuit boards or software solutions.