| 摘要 |
FIELD: measurement equipment.SUBSTANCE: amplitude A and initial phase shift ?of the vector of the harmonic signal S(t) with available period T, acting in concert with signals of subharmonic noise P(t)=Asin(2?t/T+?), wherevalues of periods Tof which are also available and multiple to T, are determined using the following ratios: A=[(p')+(p")]and ?=arctg(p'/p"), where p', p" - projections of the vector of the signal S(t) at two orthogonal vectors of reference signals, and their values are measured by means of frequency-dependent digitisation of the summary signalfor summation of its discrete counts made with the help of instantaneous pulses acting at the moments of time that accordingly create for p' and p" multitudesandwhere ?T=(2k±1)T/4, and k=0,1,2,?, which are formed in accordance with the following condition:orwhere t- arbitrary start moment of time count, H - least total multiple of multitude of numbers {r},n=0,1,2,?, and values of projections p' and p" are produced in accordance with the following ratios:where K=1/H.EFFECT: increased accuracy of real-time measurement of a vector of a harmonic signal with available period acting in concert with signals of subharmonic noise, values of periods of which are also available. |
