METHOD OF STATIC PRESSURE DETERMINING IN HIGH-PRESSURE UNCALIBRATED CHAMBER Russian patent published in 2017 - IPC G01L9/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment and can be used to determine pressure values (including high and ultrahigh) and pressure intervals in materials synthesis chambers, as well as at studies of condensed phases under high pressures. To implement method material with sufficient electrical parameters baric relationships is used. Method of static pressure determining in high-pressure uncalibrated chamber involves electric field exposure onto material, measurement of material electric parameters values at initial values of load, step-by-step applying of gradually increasing load to material and measurement of electric parameters at each stage. Electric parameters dependences on applied load are plotted by obtained values. Then load, at which pronounced behavior of material electrical properties is observed, compared values of pressure, which causes such features and known in advance. This method differs from known one by that, material is exposed to variable electric field, electric parameters are presented by actual and imaginary parts of impedance, as well as electric conductivity and losses angle tangent, which receives single value inside examined pressure interval, with exponential baric relationships. At increase of applied load such its value is determined, at which impedance actual part derivative by pressure is turned to zero and impedance imaginary part derivative by pressure simultaneously receives maximum value, and comparing load pressure value P_max, known in advance for calibration material, whereby impedance imaginary part derivative by pressure turns to zero and impedance imaginary part derivative by pressure simultaneously receives maximum value.

EFFECT: technical result is enabling possibility of determining pressure interval boundaries, due to linear relationship of pressure P_max from alternating electric field frequency, and pressure values of given interval, based on one calibration material properties.

1 cl, 7 dwg