METHOD TO MEASURE VECTOR OF HARMONIC SIGNAL Russian patent published in 2014 - IPC G01R17/00 

FIELD: measurement equipment.

SUBSTANCE: amplitude A and initial phase shift φ₀ of the vector of the harmonic signal S(t) with available period T, acting in concert with signals of subharmonic noise P_m(t)=A_msin(2πt/T_m+φ_0m), where $$m=\overline{\mathrm{1,}M},$$ values of periods T_m of which are also available and multiple to T, are determined using the following ratios: A=[(p')²+(p")²]^1/2 and φ₀=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 signal $$\sigma (t)=S(t)+{\displaystyle \sum _{m=1}^M{P}_m(t)}$$ for 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" multitudes $$\left\{t_i^{\text{'}}\right\}$$ and $$\left\{t_i^{"}\right\}=\{t_i^{\text{'}}+\Delta T\},$$ where ΔT=(2k±1)T/4, and k=0,1,2,…, which are formed in accordance with the following condition: $$t_i^{\text{'}}=t_0+T(i-1\pm n_i\cdot H)$$ or $$t_i^{\text{'}}=t_0-T(i-1\pm n_i\cdot H),$$ where t₀ - arbitrary start moment of time count, H - least total multiple of multitude of numbers {r_m}, $$i=\overline{\mathrm{1,}H},$$ n_i=0,1,2,…, and values of projections p' and p" are produced in accordance with the following ratios: $$p\text{'}=K{\displaystyle \sum _{i=1}^H\sigma (t_i^{\text{'}})},$$ $$p"=K{\displaystyle \sum _{i=1}^H\sigma (t_i^{"})},$$ 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.