GEAR DETERMINING CHARACTERISTICS OF MATERIALS Russian patent published in 1998 - IPC

FIELD: determination of heat and physical characteristics, study of properties of new materials, thermal nondestructive testing. SUBSTANCE: gear has source 1 of pulse heating, synchronizer 2, thermocouple 3 measuring temperature of surface of specimen. Thermocouple is connected through amplifier 5 to input of differentiator 6. Signals proportional to duration of heating pulse, time intervals from moment of start of gear and from moment of termination of heating pulse to moment of start of integration are formed across output of integrators 8-12. Operational logics of gear is ensured by controlled keys 20, 21, flip-flops 22, 23, logic OR gates 24, 25, frequency dividers 26-28. Values of signals proportional to calculated integrals and integration spacing are recorded by storage 30. Initial conditions are set in each calculation cycle and operation of gear is controlled by control unit 29. EFFECT: determination of heat and physical characteristics of materials of single-layer and multilayer objects in case of unidirectional access. 2 dwg