METHOD FOR CONTROL AND STABILISATION OF TEMPERATURE AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC G05D23/30 

FIELD: physics, control.

SUBSTANCE: invention is related to the field of physicotechnical tests and surveys of materials and is intended for automatic stabilisation of object temperature in the range of 4.2-300K with accuracy of ± 0.02K. Method for control and stabilisation of temperature in vapors of cryogenic liquid, by means of cold-heat balance achievement in working chamber of cryostat due to batched supply and heating of chamber, is carried out according to nonlinear law, which corresponds to temperature dependence of heat capacity of working chamber material, besides power supplied to heater is quadratic in the temperature range of 4.2-200K and linear in the range of 200-300K. Device for control and stabilisation of temperature additionally comprises amplifier-multiplier, power amplifier, and microprocessor arranged with the possibility to recount code from the outlet of ADC into code of actual temperature, to calculate difference between codes of specified and actual temperatures, to calculate speed of actual temperature variation, to change code of summator, which is inbuilt in microprocessor, and generation of codes for control of electric heater and electromagnetic valve.

EFFECT: improvement of method for temperature control in the range of 4,2-300K, and also improvement of device for its realisation.

2 cl, 3 dwg