| With the intelligent development of industrial heating,the demand for heating control in industrial technology is increasing,and there is an urgent need for a heating technology that can be precisely controlled.Compared with traditional conduction heating,microwave heating has the advantages of fast heating,selective heating,high efficiency,and easy control.However,traditional waveguide microwave heating technology has problems such as local overheating and hot spots,which may cause uneven heating during the heating process.Combustion or even explosion occurs,which greatly limits the application of microwave heating in various fields at this stage.Therefore,microwave heating should not be limited to heating efficiency and heating limit temperature.The fine control of heating range,heating temperature and heating uniformity has gradually become an urgent problem to be solved in the current heating field.Since the antenna structure is editable,the design of the antenna can be manipulated to change the field pattern within the cavity.And the thin and light antenna can be placed on the inner wall of the heating chamber,which greatly improves the space utilization.In order to improve the control accuracy of the microwave heating range and effect,the degree of freedom of the antenna needs to be further improved.Therefore,this paper proposes a time-frequency-space domain integrated modulation technology.The amplitude,frequency and duty cycle of the microwave oven can be adjusted in the time domain and frequency domain to form a time-frequency-space integrated modulation technology to achieve precise control of the electric field distribution in each area,thereby realizing precise control of the microwave heating effect.This paper takes the microwave heating antenna with time-frequency-space integrated modulation technology as the research topic,and focuses on the design and implementation of microwave heating system based on two-dimensional time-frequency-space integrated modulation technology,and the research on the microwave heating system with high power capacity two-dimensional time-frequency-space integrated modulation And the design and implementation of 2.5-dimensional time-frequency space domain integrated modulation microwave heating system.The main research contents are:In the design and implementation of time-frequency-space domain integrated modulation technology,firstly,facing the needs of on-demand microwave heating and the problems of traditional microwave heating in heating accuracy,this paper studies the relationship between electric field and electromagnetic field through the analysis of microwave heating and heat transfer theory.The relationship of the temperature field provides an effective theoretical analysis for the response law of the temperature field distribution to the antenna design.At the same time,the problems and essential defects of the traditional microwave heating technology in the high-loss cavity in the precise control of energy are analyzed,and the high-degree-of-freedom design of the antenna is introduced to discuss the high-degree-of-freedom design of the antenna in the high-loss cavity.Advantage.Combining the inherent relationship between the electromagnetic field and the thermal field in the microwave heating process,this chapter proposes a highloss cavity antenna heating technology through the internal relationship between the electromagnetic field and the thermal field,and analyzes the electric field intensity distribution of the high-loss cavity antenna during the heating process.Its heating model optimization scheme provides a design method for the realization of high loss cavity antenna heating technology.Then,the influence of the design of the antenna itself on the electric field strength of the antenna is studied.This paper combines the idea of the multiplexer with the concept of the antenna.The high-frequency selectivity of the resonator in the multiplexer is passed through the multi-band characteristics of the antenna.It can be reproduced.In this paper,a new type of frequency division multiplexing antenna based on a patch array is used to realize the multi-frequency effect to obtain the frequency-space modulation of microwave heating,which provides an effective way for the realization of the frequency domain and space domain modulation of the timefrequency space domain integrated modulation technology.design method.Finally,by adjusting the frequency distribution and time domain distribution of the microwave source output,the heating effect can be achieved on demand,that is,the heating area and heating effect can be controlled,and the design method of time domain and frequency domain modulation can be provided for the time-frequency-space domain integrated modulation technology,at the same time,test the performance stability of the system in its internal complex environment,further reflect the universality of the system in application,and compare the heating uniformity with other journal papers,to further confirm its excellent on-demand zone heating effect.In the research on the two-dimensional time-frequency-space integrated modulation microwave heating system with high power capacity,the realization of the timefrequency-space domain modulation technology in the time-frequency-space integrated modulation microwave heating system is mainly discussed,and the selection and selection of various modules in the microwave heating system are analyzed.Optimal design of core antenna and microwave source of microwave heating system.The heating effect of the time-frequency space domain modulation technology is verified by the electromagnetic simulation software HFSS,and the inhomogeneous medium environment in real life is simulated to further verify the universality of the method.Finally,the feasibility of time-frequency space-domain modulation microwave heating system is verified by experiments,which can realize on-demand partition heating effect.The system greatly reduces the cost and volume of the microwave heating system through the simple design of the antenna form with high degree of freedom,combined with the precise control of the microwave heating range and effect by combining the timefrequency space domain integrated modulation technology,the on-demand heating of the microwave heating system is realized.In the design and implementation of the 2.5-dimensional time-frequency-space integrated modulation microwave heating system,in the face of the demand for microwave heating in three-dimensional space on demand,and the problem that the existing microwave heating system ignores the heating effect in the vertical direction,a new method is proposed.The 2.5-dimensional area realizes the precise control of the microwave heating system of the heated object,and developed a 2.5-dimensional timefrequency space domain integrated modulation microwave heating system for threedimensional space on-demand microwave heating.The antenna array utilizes the aggregation effect of multi-directional electromagnetic waves,and combines the idea of time-frequency and space-domain integrated modulation.It solves the problem of precise control of microwave heating effects in discrete space areas.The 2.5-dimensional timefrequency space domain integrated modulation microwave heating system proposed in this paper provides a cost-effective design method for realizing precise intelligent heating in three-dimensional space,and is expected to be widely used in the development of industrial intelligence.application. |
