METHOD FOR MEASURING THE DISTRIBUTION OF THE THERMAL FIELD OF HEATING BY MICROWAVE RADIATION AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC G01K7/01 G01K11/32 

FIELD: measuring technology.

SUBSTANCE: invention relates to radio measuring technology, namely to measuring the thermal field of heating by microwave radiation in closed chambers, and is intended to control the distribution of the electromagnetic and thermal field of heating by microwave radiation. According to the claimed solution, converters with a fiber-optic temperature sensor 2 in the form of a matrix M×N of thermosensitive non-conductive elements that are connected in series by fiber 8, placed on a dielectric base 1, are placed in the field of the system 3 under study. Microwave heating is turned on for a while so that the converters 2 are heated to a temperature of 60-300°C. To measure the temperature of the converters 2 through the circulator 6, the radiation of a broadband laser diode 4 is illuminated using an optical filter 5. The radiation reflected from the converters 2 through the second arm of the circulator 6 falls on an optical filter with an inclined linear characteristic 9 and then on a photodetector 10 with a bandwidth equal to the maximum address frequency inherent in the array structures. The signal processed by the ADC 11 from the output of the photodetector 10 goes to the PC 7. The PC, using the calibration characteristics of the TC, multi-address fiber Bragg structure and OFILC, calculates the distributions of thermal fields in the working chamber and, as a solution to the inverse problem, the EMF intensity distribution in it.

EFFECT: invention minimizes distortion of the structure of the field under study, and is also determined by the lack of interaction between the measured EMF and the elements of measuring equipment, high speed, resistance to electromagnetic interference, dielectric nature of connections in systems, fire safety, low weight and small dimensions, operability in a wide temperature range and, finally, the possibility of combining into a fiber-optic the system of removal, transmission and processing of information, management and synchronization of processes.

2 cl, 3 dwg