METHOD FOR DETERMINATION OF BIPOLE PARAMETERS

FIELD: measuring equipment.SUBSTANCE: invention relates to electrical engineering, in particular to measurement of electrical parameters of two-terminal circuits that are used as sensors of physical processes (temperature, pressure, level of liquid and granular media, etc) in industrial facilities and vehicles. Method for determining parameters of two-terminal circuits comprises impact on two-terminal circuit connected via a communication line, and a reference sinusoidal voltage at n predetermined frequencies, where n is number of elements of two-terminal circuit. Further, method comprises measurement of currents through two-terminal circuit and reference at each of n predetermined frequencies with subsequent recording of measurement results. Parameters of two-terminal circuit are determined based on measurement results in accordance with its equivalent circuit. Distinctive feature of method is that two-terminal circuit is disconnected from communication line and after formation of sinusoidal voltage on n predetermined frequencies are measured currents through impedance of communication line and reference on each of n predetermined frequencies. Obtained results are recorded and values of parameters of impedance of communication line are determined using equivalent circuit, after which based on parameters of impedance of communication line state thereof is determined, and said parameters are taken into account when determining parameters of two-terminal circuit.EFFECT: high measurement accuracy, which is achieved by measuring parameters of cable line and taking into account measured parameters of cable network during determination of two-terminal circuit parameters by means of equivalent circuit.1 cl, 2 dwg Изобретение относится к электроизмерительной технике, а конкретно к измерению электрических параметров двухполюсников, используемых в качестве датчиков физических процессов (температуры, давления, уровня жидких и сыпучих сред и др.) на промышленных объектах и транспортных средствах. Техническим результатом является повышение точности измерения, которое достигается путем измерения параметров кабельной линии связи и учета измеренных параметров кабельной сети при определении параметров двухполюсника с помощью схемы замещения. Способ определения параметров двухполюсника заключается в воздействии на двухполюсник, подключенный через линию связи, и эталон синусоидальным напряжением на n заданных частотах, где n - число элементов двухполюсника. Далее производитс