METHOD OF THERMOPHYSICAL CHARACTERISTICS MEASURING AND THERMAL SENSOR FOR IMPLEMENTATION THEREOF Russian patent published in 2025 - IPC G01K17/20 G01N25/72 

FIELD: physics.

SUBSTANCE: invention relates to thermophysical measurements and can be used to measure temperature and heat flux on the surface of different objects. Disclosed is the thermophysical characteristics measuring method, based on the heat flow sensor with transverse temperature gradient scheme, including measurement by differential thermocouple metal No. 1 – metal No. 2 – metal No. 1 of temperature difference ΔT between centre and periphery of disc-shaped thermally thin body (HAE) made of metal No. 2 with subsequent determination of heat flux from relationship: q = 4ΔTλδ/R², where λ, R,δ are parameters of sensitive element (thermal thin body), characterized in that using thermocouples metal No. 1 – metal No. 2 additionally measuring temperature T_c in centre and temperature T_p on periphery of thermally thin disc-shaped body, then final value of temperature drop is calculated ΔT = T_c−T_p and obtained value is used to calculate value of heat flux incident on surface of thermally thin body at previously used ratio, after which the values of the heat flux obtained by two methods are correlated, and the measured temperature T_c in the centre of the thermally thin body is used as an additional thermophysical value for controlling the heat exchange process. Also disclosed is a thermal sensor comprising a device for attachment to the test object, a device for outputting electrodes, a differential thermocouple in the form of a housing made from thermocouple metal No. 1, receiving end of which is provided with cylindrical cavity connected by axial channel containing electrically insulating bushing with other cavity arranged at other end of housing. At that, in the cylindrical cavity of the receiving end there is a heat-absorbing element (HAE) from thermocouple metal No. 2, two electrodes from thermocouple metal No. 1, one of which is welded to the HAE centre, and the other to the housing of the sensor, wherein the housing of the sensor is electrically connected to the fuel cell by welding or soldering, characterized in that the thermal sensor is provided with an additional electrode made of thermocouple metal No. 2, which is welded to the fuel cell and is placed in one of channels of electrically insulating bushing and together with two electrodes from thermocouple metal No. 1 is brought out from sensor through device for electrodes outputs, wherein electrically insulating bushing is made two-channel, and electrode output device is made three-channel.

EFFECT: increase in the measurements accuracy and providing the possibility of simultaneous measurements of not only heat flows, but also temperatures during thermal tests of aircraft elements in radiant heating installations, as well as control of temperature modes and heat flows of test benches.

2 cl, 4 dwg