Active power meter with nonlinear stochastic coding - uses noise source, D=A converter and stochastic decoding in controllable counter-frequency divider

摘要

The electricity meter consists of a non-linear noise source with constant probability p = 0.5 which produces a noise voltage (UR) whose partition function approaches that of a non-linear function with the aid of shift-registers and d-a converters. This noise voltage is compared (8) with the voltage and current and the voltage and current are converted into stochastic pulses with a pulse probability proportional to the linear segments of the characteristic used for the conversion. By the use of logic gates (9, 10) multiplication is carried out. Stochastic decoding is done in a controllable counter-frequency-divider (11) whose division ratio is determined by the respective characteristic segment being used.