PROCEDURE MEASURING PHYSICAL QUANTITIES AND DEVICE FOR ITS IMPLEMENTATION (VERSIONS) Russian patent published in 2001 - IPC

FIELD: instrumentation. SUBSTANCE: angle of shift of vector of induction of magnetic field induced by vector sum of three currents having common start, lying in one plane and developed through angles of 120 degrees is observed in process of measurement of physical quantity. Two (one) of currents flow through tested specimens (tested specimen) and one (two) current flows through calibration instrument (two calibration instruments) relative to vector of induction of magnetic field induced by current in circuit of calibration instrument (tested specimen). Then measured physical quantity is computed by values of calibration instrument (instruments) and trigonometric function of observed angle of shift or values of measured physical quantity are read from scale calibrated with due account of values of calibration instrument (instruments) and trigonometric function of angle of shift. If it is necessary to limit power of electric circuits of primary converter angle of shift of vector of induction of magnetic field is evaluated by relation of two voltages proportional to sine and cosine projections of vector sum of three currents by vector of current in circuit of calibration instrument (primary converter). EFFECT: development of equipment measuring physical quantities and characterized by simple design and enhanced operational reliability. 12 cl, 8 dwg