APPARATUS FOR MEASURING THE THERMOPHYSICAL PROPERTIES OF PLASTIC MATERIALS Russian patent published in 2022 - IPC G01N25/18 G01K7/16 

FIELD: measuring.

SUBSTANCE: invention relates to the technology for measuring the thermophysical properties of materials and can be used for measuring the heat conductivity and thermal activity of plastic dielectric materials, including biological tissues and liquids, including organic fluids. The novel element of the invention consists in the rapid heating of an amorphous body by the resistive element of the resistance thermometer sensor during an electric current pulse at the point of contact thereof, recording of the resistance of the sensor in a single heating pulse at a set signal pickup frequency, transmission of the measurement results to a personal computer for further processing: calculation of the temperature, heat conductivity and thermal activity values. Apparatus comprises 5 channels for measuring the resistance of the resistance thermometer sensor, capable of working simultaneously with different set experiment parameters. For each measurement channel, the voltage, the time of the heating current pulse of the sensor, the number of current pulses, the interval between current pulses, and the signal pickup frequency for the signal from the sensor about the electrical active resistance thereof when heated by a current pulse can be set before the experiment. A constant voltage from a power supply unit is used for operation of the apparatus. The current on the sensor has a constant value, changing abruptly at the beginning and at the end of the pulse in a U-shaped manner. Thus, the range of measurement modes is expanded when flat sensors of resistance thermometers are used on a substrate and multiple channels for measuring the thermophysical properties are used simultaneously.

EFFECT: higher informative value of measurements, shorter duration of the experiment.

2 cl, 2 dwg