425 results about "Microwave transmission" patented technology

A microwave oven includes a housing defining an interior cavity, a magnetron positioned within the housing and outside of the interior cavity and a micro-wave antenna in electrical communication with the magnetron and positioned adjacent a lower surface of the interior cavity. The microwave oven further includes a heating plate that includes a glass-ceramic substrate defining at least a portion of the lower surface of the interior cavity. The heating plate further includes a resistive-heating coating applied on a portion of the glass-ceramic substrate and defining at least one open micro-wave transmissive path from the micro-wave antenna to the interior cavity.

The invention relates to a self-adaptive frequency optimization system in radio and television microwave transmission, and the system comprises an initial audio collection and processing module which collects an audio signal of a current frequency channel in real time, and generates a first data set; the conversion audio acquisition processing module synchronously acquires a target channel signal according to the frequency switching signal, and calculates the loudness offset between two channels; a feature extraction module extracts frequency domain energy distribution feature vectors of the first data set and the second data set; the model construction module constructs a dynamic gain compensation model and generates a compensation value of a target channel; the tone quality compensation module performs smoothing processing on the compensation value to generate an optimized third data set; and the audio optimization module updates model parameters, dynamically adjusts a frequency domain analysis strategy, and outputs low-delay and high-stability radio and television transmission signals. According to the invention, the problems of high switching delay and degraded tone quality caused by static configuration in a traditional scheme are solved, and the transmission efficiency and user experience in a complex electromagnetic environment are remarkably improved through modular dynamic calibration and compensation.

The utility model discloses a polycrystalline reduction starting device and a microwave power supply heating system, and relates to the technical field of polycrystalline silicon, a polycrystalline reduction furnace comprises a reduction furnace base and a bell jar which are detachably connected, the polycrystalline reduction starting device is characterized in that the tail of a microwave energy feedback device is connected with a microwave transmission device, and the microwave transmission device is used for being connected with a microwave emission device; the microwave energy feedback device is installed on the surface of the bell jar and guides microwave energy into the polycrystalline reduction furnace to heat the silicon core. The microwave energy feedback device introduces microwave energy into the reduction furnace to heat the silicon core, so that the resistance value of the silicon core can be reduced, the silicon core can be subsequently subjected to breakdown start with lower voltage, microwave heating can be started at low voltage, the phenomenon of discharge sparking in the reduction furnace is avoided, an insulating part at the bottom of the reduction furnace is prevented from being damaged, and safe operation of equipment can be ensured; and other materials or impurities cannot enter the reduction furnace through microwave heating, so that the environment of the reduction furnace is prevented from being polluted, and the purity of generated polycrystalline silicon is prevented from being reduced.

The invention provides a distributed multi-target microwave transmission control method and system, and relates to the technical field of data processing, and the method comprises the steps: obtaining the geographic coordinate information of each target device, constructing the motion track of each target device, sorting the coordinate information of each target device according to a time node sequence, and storing the sorted coordinate information of each target device; coordinate difference values between adjacent time nodes are accumulated to obtain a predicted coordinate data set; coordinate distance values between target devices are extracted; the coordinate distance values are subjected to grouping statistics to obtain a position merging data set; beam direction range information and beam angle interval parameters of a current time period are extracted; and obtaining a beam candidate data set, performing coordinate comparison on each target device to obtain beam binding data, generating a control instruction, and ensuring that the beam adjusts the beam emission direction according to the control instruction. The coordinate of the target equipment can be predicted, the beam emission direction can be controlled, and microwaves can be stably transmitted to the target equipment.

Systems, methods, and apparatus for multiplexed control and readout of quantum computing systems that can include qubits, couplers, and other related quantum computing circuit devices. Numerous examples of superconducting quantum computing systems are described that include some, or all, of these quantum computing circuit devices integrated into a superconducting quantum circuit that can be interfaced by a classical control system. In one example, a superconducting circuit is described. The superconducting circuit includes: a superconducting device including a superconducting loop interrupted by one or more Josephson junctions; a first microwave resonator inductively coupled to the superconducting loop of the superconducting device; a second microwave resonator capacitively coupled to the superconducting device, where the first and second microwave resonators each have a different fundamental frequency; and a microwave transmission line evanescently coupled to each of the first and second microwave resonators.

The invention discloses a terahertz wave band circularly polarized antenna based on sequential rotation feeding, and belongs to the field of radio frequency front-end devices. The circularly polarized antenna is composed of four microstrip patches, chamfers located on a radiation patch, a microstrip line, a microstrip line feed port, a sequential rotation feed network, a dielectric substrate, a metal ground backboard and a microstrip line matching structure. A 90-degree phase difference is generated by strictly designing the electrical length from each port to the feed network to realize circular polarization performance, right-handed circularly polarized waves are radiated, the radiation gain is 10.47 dB, the 3dB axial ratio bandwidth is greater than 8GHZ, the 3dB axial ratio range exceeds 90 degrees, and the complete half-power beam width is covered. The antenna adopts the microstrip line for feeding, the loss of the microstrip line is small, the microwave transmission characteristic is good, and the antenna radiation efficiency is high. The antenna adopts a single-layer board design, has no complex feed network, and is simple in structure and convenient to manufacture.

Superconducting integrated circuits may advantageously employ superconducting resonators coupled to a microwave transmission line to efficiently address superconducting flux storage devices. In an XY-addressing scheme, a global flux bias may be applied to a number of superconducting flux storage devices via a low-frequency address line, and individual superconducting flux storage devices addressed via application of high-frequency pulses via resonators driven by the microwave transmission line. Frequency multiplexing can be employed to provide signals to two or more resonators. A low-frequency current bias may be combined with a high-frequency current in one or more superconducting resonators to provide Z-addressing. A low-frequency current bias may be combined with a high-frequency current in one or more superconducting resonators to eliminate a flux bias line. A low-frequency current bias may be used at room temperature to identify the presence of a DC short, an open, and / or an unexpected resistance in a superconducting resonator.

The invention provides a 915 MHz MPCVD device for 16-inch diamond wafer deposition, and relates to the technical field of microwave plasma chemical vapor deposition. The device comprises a shell, a cavity is formed in the shell, a microwave inlet is formed in the top of the shell, a coaxial antenna is installed in the cavity of the shell, an air inlet is formed in the coaxial antenna, an air outlet and a substrate are arranged at the bottom of the shell, and the air inlet and the air outlet are communicated with the cavity; and a plurality of microwave medium windows are arranged on the inner wall of the shell. The microwave dielectric windows are arranged, the length and the phase of a microwave transmission path are changed, the two microwave electric field areas are connected into a whole, the plasma is excited, and the formed plasma area is located on the substrate. According to the device, a continuous TM02 microwave electric field with the diameter of 16 inches is generated on a substrate through the design of the structure of the resonant cavity and the shape and position of a microwave medium, a large-size plasma area is excited, and 16-inch diamond wafer deposition is achieved.

A nonreciprocal microwave transmission device includes a substrate, a transducer on a surface of the substrate and configured to reciprocally convert between electrical signals to acoustic waves, a first piezoelectric material configured to generates and transports acoustic waves from a signal applied to the transducer, and a thin film magnetic material configured to couple to acoustic waves through magnetoelastic coupling so as to have non-reciprocal magnetoelastic coupled acoustic wave transport. Transmission of acoustic waves through the thin film magnetic material is in a direction toward the transducer has a first magnitude and transmission of acoustic waves through the thin film magnetic material in a direction away from the transducer has a second magnitude, the first and second magnitude being significantly different.

The invention belongs to the technical field of microwave sources in the high-power microwave technology, and particularly relates to a compact full-cavity extraction relativistic magnetron based on metamaterials. Compared with a traditional full-cavity extraction relativistic magnetron based on a metamaterial resonance structure, the compact full-cavity extraction relativistic magnetron based on the metamaterial resonance structure introduces a microwave transmission region behind an anode, and also introduces a metamaterial structure into the microwave transmission region; through the design, microwaves can be radially coupled and output behind the resonant cavity, so that an excitation system can be directly loaded outside the anode block, the inner diameter size of the excitation system is effectively reduced, the miniaturization advantage of the metamaterial is fully played, and the compactness and the light miniaturization degree of the whole high-power microwave system are further improved.

The invention relates to an MPCVD cavity structure simulation optimization method based on a neural network proxy model, and the method comprises the following steps: S1, obtaining the radius R1 and height H1 of a reaction cavity of MPCVD equipment and the size D1 of a microwave transmission channel, and building a simulation model of the reaction cavity of the MPCVD equipment; s2, calculating the position of the plasma in a reaction cavity of the MPCVD equipment by using a Finner model, performing grid region division according to a prediction result of the Finner model, and establishing a chemical reaction system of the plasma; s3, constructing a neural network training set based on the physical parameters of the plasma in the reaction cavity of the MPCVD equipment, and performing deep neural network training; and S4, optimizing the size of the reaction chamber of the MPCVD equipment through a multi-target particle swarm optimization algorithm on the basis of a plasma form prediction result obtained by deep neural network training. And establishing a multi-physical field simulation model of the MPCVD equipment reaction cavity and training a neural network, so that the plasma can be uniformly distributed under the condition of maintaining the original high-density distribution level by optimizing the MPCVD equipment reaction cavity.

The invention discloses a single-pole eight-throw coaxial switch, and belongs to the technical field of microwaves. According to the 67GHz single-pole eight-throw coaxial switch, the 1.85 mm coaxial transmission line and the edge line transmission line are adopted to form a microwave transmission system of the 67GHz single-pole eight-throw coaxial switch, and the 67GHz single-pole eight-throw coaxial switch is realized; a 7-shaped microwave transmission system is adopted, and a single-pole eight-throw coaxial switch with a load is realized on the premise that the size of the coaxial switch is not increased; the transmission reed and the push rod form a push rod assembly, the push rod assembly is limited by a pin on the cover plate, and the friction position of the push rod in the moving process is transferred out of the microwave cavity, so that poor contact caused by transfer to the contact position after redundancy generated by friction is avoided; the push rod assembly is limited by the pin, so that the limiting precision is high; the load of the on-load single-pole eight-throw coaxial switch is realized by adopting a load sheet, and the load sheet has the advantages of simple structure, high working frequency, good standing wave, low cost and the like; and coaxial loading can also be adopted, so that assembly and disassembly are facilitated.

The invention provides a heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity drainage, and belongs to the field of oil-gas field development. The experimental device comprises a three-dimensional oil reservoir simulation system, a microwave-assisted heating system, a horizontal well injection-production regulation and control system and a multi-field monitoring system; the microwave auxiliary heating system comprises a microwave generation regulation and control system, a microwave transmission system and a shaft integrated microwave radiator, the microwave generation regulation and control system comprises an industrial grade microwave generator, a power regulator and a PLC, and the microwave transmission system comprises a microwave coaxial cable and a microwave waveguide tube bundle; and the microwave generator is continuously connected with the microwave waveguide tube bundle and the shaft integrated microwave radiator. According to the heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity oil drainage, the technical problems that an existing deep heavy oil thermal recovery experimental device cannot reproduce a'thermal-flow-force 'multi-field coupling environment, the microwave heating adaptability is poor, and the experimental scale and the field deviation is large are solved. The heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity oil drainage solve the technical problems that an existing deep heavy oil thermal recovery experimental device cannot reproduce the'thermal-flow-force' multi-field coupling environment.

According to the gas-liquid two-phase flow pattern identification and water holding rate prediction method based on the microstrip antenna and the deep neural network, a measurement system adopts a microwave transmission method principle, the amplitude is attenuated when microwaves are transmitted in the gas-liquid two-phase flow, an amplitude attenuation signal can reflect the change of the dielectric property of the fluid, and the flow pattern identification and water holding rate prediction of the gas-liquid two-phase flow are realized. The microstrip antenna microwave sensor system comprises a measurement pipeline, a microstrip antenna microwave transmission sensor, a power divider, an amplitude phase detector, a data acquisition module and an upper computer. When microwaves are transmitted in the gas-liquid two-phase flow, the amplitude is attenuated, an amplitude attenuation signal can reflect the change of the dielectric property of the fluid, an intelligent model based on a deep neural network is provided based on amplitude attenuation data measured by a microwave sensor, and the identification of the flow pattern and the measurement of the water holding rate based on the flow pattern are realized.

The present disclosure provides a microwave transmission method and a single-input multiple-output waveguide microwave system based on frequency control, an electronic device. The method includes: adjusting frequency of an input microwave, each of different input microwaves with different frequencies being input microwave of the single-input multi-output waveguide microwave system; assigning the input microwave to a target output port among multiple output ports of the single-input multiple-output waveguide microwave system, according to the frequency of the input microwave; and performing microwave output through the target output port.

The invention discloses a highly packaged magnetic sensing chip based on an NV color center, and the chip comprises a packaging housing (1) which is provided with a packaging pedestal and chip pins. The chip is characterized in that the chip also comprises an NV color center diamond (2) which is arranged on the packaging base; the laser diode bare chip (3) is arranged on the packaging base, and the light-emitting side of the laser diode bare chip faces the NV color center diamond; the microwave transmission microstrip line (4) is arranged between the interior and the edge of the packaging base and is electrically connected with the chip pins; the first photoelectric detector assembly (5) is arranged on the NV color center diamond and used for collecting fluorescence signals.

The invention discloses a double-heating-system electronic-grade polycrystalline silicon reduction furnace and a process method thereof, and relates to the technical field of polycrystalline silicon production equipment, and the reduction furnace comprises a cooling liquid inlet and a cooling liquid outlet which are respectively formed in the upper part and the lower part of a microwave window; a microwave emission branch pipe is fixedly arranged on the outer side of each microwave window, and each microwave emission branch pipe is connected with the microwave emitter through a microwave transmission header pipe; the method comprises the following steps: S1, starting the furnace; s2, early growth stage of the silicon rod; s3, middle growth stage of the silicon rod; s4, later growth stage of the silicon rod; and S5, blowing out the furnace and cooling. The double-heating-system electronic-grade polycrystalline silicon reduction furnace has the beneficial effects that silicon rods with larger diameters can be produced, and the yield of a single furnace is remarkably increased; the quality of the silicon rod is improved, and the high quality requirement of electronic-grade polycrystalline silicon is met; according to the process method disclosed by the invention, the utilization rate of raw materials is increased to 89% or above, the generation amount of amorphous silicon powder is reduced to 7.2 kg / furnace or below, and the energy consumption of a unit silicon rod is reduced.

The invention discloses an advanced water detection method based on controllable microwave and optical fiber temperature measurement combination. The method comprises the following steps: arranging a controllable microwave and optical fiber temperature measurement system; then the microwave transmitter and the receiver are matched with each other to obtain microwave data; meanwhile, the distributed optical fiber sensor obtains temperature data; then the monitoring host performs attenuation analysis on each group of received microwave data in combination with microwave emission power, preliminarily judges whether a water-containing disaster-causing body exists or not, and performs inversion processing on the received temperature data through a heat conduction model if the water-containing disaster-causing body exists so as to obtain the position of a heat source; and finally, setting a water-containing disaster-causing body judgment condition, performing fusion processing on the obtained water-containing disaster-causing body position and the heat source position, and finally determining the position of the water-containing disaster-causing body. By combining controllable microwaves with optical fiber temperature measurement, on the premise of a large detection range, the position of a water-containing disaster-causing body can be rapidly and accurately detected, meanwhile, the device has the advantage of being convenient to arrange, and therefore advanced detection of mine water disasters is effectively achieved.

The invention relates to the technical field of moisture content measurement, and discloses a corrugated board moisture content measurement method and system, and the method comprises near infrared spectrum data, microwave transmission data and acoustic vibration data; calculating a spectral feature vector; constructing a microwave response matrix; determining an acoustic damping coefficient; calculating stability indexes of the spectral feature vector, the microwave response matrix and the acoustic damping coefficient in a preset time window, and calculating a consistency index and a confidence coefficient weight; fusing the spectral feature vector, the microwave response matrix and the water content corresponding to the acoustic damping coefficient through a Kalman filtering algorithm, and outputting initial water content; dynamically adjusting a process noise covariance matrix of Kalman filtering, and when the residual error of any data source exceeds a preset statistical threshold value, resetting the confidence coefficient weight corresponding to the data source to zero; and repeatedly executing fusion, and outputting the water content. According to the method, three measurement means of near infrared, microwave and acoustics are adopted, the water content state of the corrugated board can be represented more comprehensively, and the water content measurement precision is improved.

The invention discloses a DC-110 GHz broadband microwave transmission system, and belongs to the technical field of microwaves. According to the microwave transmission system disclosed by the invention, the structure size design is carried out on the lap joint of the transmission reed and the conductor in the middle radio frequency connector, and a width-narrowing step change mode is used, so that the impedance of the transmission line is matched, and the transmission frequency of the microwave transmission system can reach up to 110GHz; according to the invention, the size of the limiting column on the cover plate is matched with the size of the limiting hole in the medium seat, so that the transmission reed does not rotate in the movement process, friction redundant materials can be effectively prevented from entering the microwave cavity through the mode, and the repeatability of the switch is improved; the microwave transmission system is applied to the single-pole double-throw coaxial switch, the transmission frequency of the microwave transmission system can reach 110 GHz, the transmission frequency of an existing single-pole double-throw coaxial switch is greatly improved to 110 GHz from 67 GHz, and the requirement for high-frequency signal transmission is met.

The spin-orbit torque-based device comprises a microwave transmission layer and a microwave absorption layer, and the microwave absorption layer is arranged on the upper surface of the microwave transmission layer; the microwave transmission layer is a CPW coplanar waveguide, and the microwave absorption layer is a ferromagnetic layer / strong spin coupling layer heterojunction. Through the heavy metal / ferromagnetic layer heterojunction, spin-orbit torque is generated by the spin Hall effect in the heavy metal layer to influence the magnetic property of the ferromagnetic layer, the current is directly used as a regulation and control mode, an electromagnet or coil current does not need to be additionally arranged outside the device, and the problem of large size is solved. Meanwhile, the spin-orbit torque is actually regulated and controlled by the current density, microwave tuning of milliampere-level current is achieved by controlling the size of a device, the advantage of low power consumption is achieved, and meanwhile the potential of constructing a device with extremely low power consumption is achieved. And the functional layer can be realized only by the coplanar waveguide and the double-layer film heterojunction, so that the structure is simple and clear.

The invention relates to the technical field of network communication, and particularly discloses a network communication system and method for a high-cold high-altitude hard region, and the system comprises a signal enhancement and path optimization module which generates a plan about a beam dynamic adjustment parameter and transmitting power through a matrix antenna in combination with environment data obtained in real time; the hybrid communication module selects any one of microwave transmission, satellite communication and ground mobile communication according to an intelligent algorithm so as to execute the plan; and the monitoring maintenance module analyzes the basic state of the communication equipment obtained in real time to obtain a predicted potential fault, and generates a maintenance strategy corresponding to the predicted potential fault according to the expert knowledge base. According to the invention, through reasonable planning of a transmission path, signals are prevented from passing through complex terrains and atrocious climate areas in a transmission process, so that attenuation and interference of the signals are reduced.

The invention discloses a high-efficiency signal transmission method and system of integrated microwave transmission equipment, and relates to the related field of wireless transmission, and the method comprises the steps: obtaining a target signal sending point and a target signal receiving point, on a 13GHz frequency band, selecting a target channel by using a Wi-Fi6 channel binding technology, and carrying out subcarrier division on a frequency spectrum of the target channel by using an OFDMA technology to obtain K subcarriers; carrying out transmission quality analysis to obtain K subcarrier transmission quality factors; performing modulation mode and coding redundancy double-term equilibrium analysis, and determining K modulation modes and K coding redundancies; carrying out modulation and transmission data coding on the K subcarriers by utilizing Wi-Fi6; and carrying out signal transmission of K pieces of coding redundancy transmission data between the target signal sending point and the target signal receiving point based on the K modulated subcarriers. The technical problems that existing signal transmission is low in transmission efficiency and poor in stability are solved, and the technical effect of improving the signal transmission efficiency and stability is achieved.

The quantum current transformer based on the optical fiber isolation microwave transmission comprises a high-voltage primary side which comprises a magnetic shielding ring and an NV color center magnetic sensing probe module, and a magnetic sensing probe is arranged in the magnetic shielding ring; at the low-voltage secondary side, the microwave system is used for generating radio-frequency signals in a preset frequency range and transmitting the radio-frequency signals to the NV color center magnetic-sensing probe module, the laser system is used for generating continuous laser and transmitting the continuous laser to the NV color center magnetic-sensing probe module, and the microwave system and the laser system are used in cooperation to drive the NV color center to generate fluorescence signals representing the magnetic field intensity. A fluorescence signal is transmitted to the data processing system to calculate to-be-detected current information; wherein the microwave system is connected with the NV color center magnetic sensing probe module through an optical fiber, the microwave system modulates the radio frequency signal into an optical signal, transmits the optical signal to the NV color center magnetic sensing probe module, and restores the optical signal into the radio frequency signal in the NV color center magnetic sensing probe module to be received. According to the transformer, stable transmission of microwave signals under the high-low voltage isolation condition is achieved, the design is reasonable and exquisite, and the measurement precision is high.

The invention discloses a wireless charging system and method for unmanned inspection equipment of a power system. The wireless charging system comprises the unmanned inspection equipment, an ET and a reconfigurable intelligent surface, a radio frequency signal output by the ET is connected with the beam former, one part of the radio frequency signal processed by the beam former is received by a receiving antenna of the unmanned inspection equipment, and the other part of the radio frequency signal is received by the receiving antenna after being processed by the reconfigurable intelligent surface beam former. The multiple energy collection circuits are nonlinear and are connected in parallel, radio frequency power output by the receiving antenna is connected with input of all the energy collection circuits connected in parallel through the power divider, output of all the energy collection circuits connected in parallel is connected with the storage battery, and the energy collection circuits rectify the radio frequency power into direct current power to charge the storage battery. The unmanned inspection equipment can supplement energy in a fixed time slot and continuously receive wireless charging signals, so that long-time hovering and operation are realized, and the microwave WPT transmission efficiency can be greatly improved.

The invention relates to a forming and surface treatment method of a twisted waveguide, and belongs to the field of metal additive manufacturing technology and surface treatment. The manufacturing technical problems that parting manufacturing precision and reliability are poor, torsional deformation and position tolerance of torsional forming are not easy to guarantee, and a welding position is prone to deformation are solved, and the problem that a twisted waveguide not plated with a copper layer is large in microwave transmission loss is solved. The method comprises the following steps: modeling a designed twisted waveguide, and completing support adding and slicing processing; aluminum alloy powder is added into a forming equipment material cylinder; performing selective laser melting forming by adopting the slice file to obtain a twisted waveguide with a substrate and a support; separating the twisted waveguide from the substrate and the support; carrying out finishing processing on the twisted waveguide by adopting chemical polishing; and plating the twisted waveguide by adopting chemical plating to obtain the twisted waveguide with the plating layer. The additive manufacturing integrated forming and surface treatment process is adopted, the production period is effectively shortened, the product quality reliability is improved, and the microwave transmission loss is reduced.

The invention relates to a miniaturized high-frequency microwave transmission structure for height difference transition. The miniaturized high-frequency microwave transmission structure comprises a microwave multilayer dielectric substrate. The microwave multilayer dielectric substrate comprises a substrate main body, an upper side metalized conduction band and a lower side metalized conduction band. The substrate body comprises a first conduction band layer, a second conduction band layer, a third conduction band layer, a first dielectric layer and a second dielectric layer. Metalized through holes are formed in the substrate main body; the second conduction band layer comprises a middle layer signal conduction band and two fifth grounding conduction bands; and the metalized through hole passes through the first dielectric layer and the second dielectric layer and is connected with the first conduction band layer, the second conduction band layer and the third conduction band layer. Compared with an existing transition structure, the miniaturized high-frequency microwave transmission structure can effectively solve the problem of transmission transition of various height differences in a radio frequency microsystem module, not only ensures good transmission characteristics, but also can adapt to various height differences, and is convenient for realizing miniaturized integration of the radio frequency microsystem module.

To provide a technique of precisely and stably measuring moisture when measuring moisture in a coal carried on a conveyor by using a microwave.SOLUTION: A moisture measuring method for measuring moisture in coal carried on a conveyor includes: a coal pressure reduction step of reducing the pressure of a coal carried on a conveyor and levelling out a surface of the coal and compressing the coal; a layer thickness measuring step of measuring a layer thickness of the coal after the pressure of the coal is reduced in the coal pressure reduction step; a microwave sending step for sending a microwave as a transmission wave to the coal after the pressure of the coal is reduced in the coal pressure reduction step; a microwave receiving step of receiving the microwave which was sent in the microwave sending step and passed through the coal as a reception wave; a microwave change amount calculation step of comparing the transmission wave and the reception wave and calculating a change amount; and a water content calculation step of calculating a water content of the coal on the basis of the change amount calculated by the microwave change amount calculation step and the layer thickness of the coal measured in the layer thickness measuring step.SELECTED DRAWING: Figure 3

The invention relates to the technical field of microwave treatment, in particular to a microwave treatment system with multiple safety monitoring functions, which comprises a temperature field monitoring module, a standing wave detection module, an impedance analysis module, a contact state detection module, a power decision module and an emergency control module, the temperature field monitoring module generates biological tissue temperature distribution data; the standing wave detection module calculates a standing wave coefficient of a microwave transmission path; the impedance analysis module outputs an impedance change rate; the contact state detection module is combined with the impedance change rate to generate a contact safety index; the power decision module generates a dynamic power adjustment instruction; the emergency control module detects a standing wave coefficient gt; 2.5, the impedance change rate gt; 40% / s or contact safety index lt; and when 0.7, a three-level gradient braking strategy is started. According to the invention, the capability of early warning risk factors such as thermal field abnormity, energy coupling mismatch and poor contact is effectively improved.

The invention relates to the technical field of material physical property testing, in particular to a ferromagnetic resonance linewidth automatic testing system and method, and the system comprises a main control unit, a signal generator, a spectrum analyzer, a magnetic field generation device, a gauss meter, a microwave transmission structure and two attenuators. The signal generator, the spectrum analyzer, the magnetic field generation device and the gauss meter are electrically connected with the main control unit, one attenuator is connected between the signal generator and the microwave transmission structure, the other attenuator is connected between the microwave transmission structure and the spectrum analyzer, and a crystal oscillator synchronization line is connected between the spectrum analyzer and the signal generator. The method comprises the following steps of: scanning point by point to read the readings of a spectrum analyzer influenced by a sample under different frequencies and different magnetic field intensities, and performing data curve fitting according to three groups of data of the frequency, the magnetic field intensity and the power to obtain a ferromagnetic resonance line width result of the sample; the signal generator and the spectrum analyzer are cheaper than the network analyzer.