RU95110077A - Method and device for identification of complex of thermal physical properties of solid materials - Google Patents

Abstract

FIELD: technical physics, examination of thermal physical properties of substances. SUBSTANCE: proposed method includes action with thermal pulses from line source on to flat surfaces of examined and standard samples, measurement of excessive temperatures at moments of supply of thermal pulses in points located on surface of sample at fixed instances from line of heating. Measured temperatures are compared with minimum error with temperatures of originals formed by program control over measures of thermal physical characteristics. Sought-for characteristics are determined by identified measures and real values of characteristics of standard. Device for identification of complex of thermal physical properties of solid materials has demultiplexer, controlled power supply unit, measurement probe, D.C. amplifier, analog-to-pulse converter, programmed timers connected in series. It is additionally inserted with register and address selector which output bus is connected to address inputs of demultiplexer, first and second programmed timers and register connected correspondingly with first and second inputs to synchronizing input and output of first programmed timer which controlling input is ties up with like bus to corresponding inputs of second programmed timer, address selector of register and output of microcomputer. Address output of the latter is coupled through like bus to proper input of address selector and input-output of microcomputer is connected through like bus to corresponding input of demultiplexer and output of register. EFFECT: expanded range and increased measurement accuracy of thermal physical properties of materials.

Claims (1)

Method and device for identifying a complex of thermophysical properties of solid materials. The present invention relates to technical physics, namely to the field of research of thermophysical properties of substances. The technical task is to increase the range and accuracy of measuring the thermophysical properties of materials. This technical problem is achieved by the fact that in the method of determining the thermophysical characteristics, including the action of thermal pulses from a linear source on the flat surface of the test and reference sample, measurement of excess temperatures at the moments of heat pulses at points located at fixed distances from the heating line on the surface of the sample, temperature measurement is compared with a minimum error with the temperatures of the originals formed by software control of lofizicheskih characteristics, identified by measures of actual values and reference characteristics determine the desired characteristics. A register and address selector, the output bus of which is connected to the address inputs of the demultiplexer, the first and second programmable timers, and the register, are additionally introduced into the device, which contains a series-connected demultiplexer, a controlled power supply unit, a measuring probe, a DC-pulse converter, programmable timers. connected by the first and second input, respectively, with the synchronizing input and output of the first programmable timer, the control input of which is combined with the same bus with the corresponding inputs of the second programmable timer, register address selector and microcomputer output, the address output of the latter via the bus of the same name is connected to the corresponding input of the address selector, and the microcomputer data input-output is connected via the bus of the same name to the corresponding demultiplexer input and register output.