110 results about "Microwave reflection" patented technology

The invention belongs to the technical field of microwave measurement, and discloses an outer wall hollowing microwave reflection detection method based on multi-modal fusion, which comprises the following steps: carrying out multi-modal scanning on a building outer wall to be detected, obtaining visible light image data and infrared temperature distribution data of the outer wall surface, and carrying out space registration and coordinate mapping; a unified multi-modal fusion data set is formed; performing anomaly screening on the multi-modal fusion data set, and identifying a thermal anomaly region by analyzing infrared temperature distribution data; detecting a bump or crack area in combination with texture and morphology anomaly features of the visible light image data; performing information fusion on the thermal anomaly region and the bump or crack region, and extracting candidate detection regions of suspected hollowing; high-precision recognition and quantitative evaluation of the outer wall hollowing are achieved, and the precision and stability of outer wall hollowing detection are improved.

The invention belongs to the cross technical field of artificial intelligence and environmental protection engineering, particularly relates to a denitration catalyst microwave regeneration optimization method based on machine learning, and aims to solve the problems of inaccurate energy matching, large structural damage and low efficiency of a traditional regeneration method. The method comprises the following steps: constructing a catalyst multi-dimensional feature database, establishing a microwave regeneration multi-physics field coupling simulation model, and training an integrated learning prediction model to associate input features with a regeneration effect; in the regeneration process, infrared thermal imaging, microwave reflection and gas sensing equipment are integrated, temperature field, energy absorption and tail gas data are collected in real time, and microwave power, frequency and atmosphere parameters are dynamically regulated and controlled. Accurate energy release and closed-loop intelligent regulation and control are achieved, the activity recovery rate after regeneration exceeds 92%, the specific surface area retention rate exceeds 85%, the regeneration period is shortened to one third of that of a traditional method, energy consumption is reduced by 40%, full-life-cycle intelligent management of the catalyst is supported, and economical efficiency and sustainability of environmental protection equipment are remarkably improved.

The invention discloses a polyethylene pipe microwave defect detection system based on a multi-dimensional movement mechanism. The method comprises the steps that firstly, full-coverage scanning of a welding area is achieved through a clamp and a control device, and microwave reflection signals of a welding joint are collected and subjected to amplification, filtering and normalization processing; converting the frequency domain signal into a time domain B-scan image by using inverse fast Fourier transform (IFFT), and effectively inhibiting direct waves and high-frequency noise by using a wavelet transform threshold denoising method so as to enhance defect reflection characteristics; on the basis, the system can identify and position typical defects such as holes, slag inclusion, incomplete fusion and the like, and visual visualization of defect positions and forms is realized through the information display module. The system is compact in structure and high in detection precision, has the advantages of high automation degree, wide application range, simplicity and convenience in operation and the like, can realize rapid and accurate detection of weld defects of the polyethylene pipeline, and provides reliable technical guarantee for pipeline quality evaluation and safe operation.

The invention discloses a double-probe film thickness and defect collaborative decoupling method. The method comprises the steps that microwave reflection signals of a thermal barrier coating are synchronously collected through a coaxial resonance probe and a CSRR resonance ring probe; the microwave reflection signal comprises reflection coefficient amplitude, reflection coefficient phase and resonant frequency; constructing a frequency deviation model based on the microwave reflection signal; training the dual-channel deep learning network based on the frequency deviation model to obtain a trained dual-channel deep learning network; and obtaining film thickness information and a defect positioning result based on the trained dual-channel deep learning network. According to the method, collaborative decoupling of the film thickness and the defect signal is achieved through a physical-data fusion method, effective decoupling and independent recognition of the coating film thickness change and the defect response signal are achieved, and the resolution ratio, the accuracy rate and the practicability of a detection system are improved.

A center shaft of a feed source and an X-axis stator of a base are coaxial and jointly fixed on an X-axis base, an X-axis drives an auxiliary reflector, a Y-axis and a main reflector to rotate jointly, the Y-axis drives the main reflector to rotate relative to the auxiliary reflector, microwave signals are emitted from the feed source and reflected to the main reflector through the auxiliary reflector with an included angle of 45 degrees, and the microwave signals are reflected to the main reflector through the auxiliary reflector with the included angle of 45 degrees. The first reflection microwave direction rotates along with the X axis, and the second reflection microwave direction rotates along with the Y axis; the microwave signal receiving process is opposite; when the antenna is launched, the antenna is folded, and the Y-axis driving shaft and the main reverse fixed assembly rotate reversely together, and are pressed on a satellite deck by a pressing point. A plurality of rotating joints and connecting waveguides of a two-dimensional mechanism are omitted, feed line loss is greatly reduced, efficiency is improved by more than 30% under the same caliber, weight is reduced by more than 40%, control over main and auxiliary reverse installation precision of the mechanism is greatly simplified, and the mechanical environment of a satellite launching section can be met.

The invention discloses a plasma field three-dimensional chromatography reconstruction method based on microwave reflection and probe combined measurement, which comprises the following steps: firstly setting the frequency of a microwave antenna and the measurement position of a probe, and then realizing high-precision combined diagnosis of electron density distribution by combining the global non-contact measurement advantage of a microwave reflection method and the local fine measurement capability of an electrostatic probe; and then realizing high-precision fitting of the electron density based on a physical constraint Gaussian process regression model, establishing a mapping relation between the electron density and an emission coefficient, and finally reconstructing a three-dimensional electron density field with millimeter-level resolution.

This invention discloses a microwave detection method for wellbore rock humidity in gas drilling, comprising the following steps: S1: Establishing a near-bit annular space microwave propagation model based on the annular structure of the gas drilling well and the properties of the rock wall interface; S2: Establishing a microwave reflection coefficient calculation model for the wellbore rock wall interface based on the near-bit annular space microwave propagation model; S3: Establishing a quantitative calculation model for the change in microwave reflection coefficient of the wellbore rock wall under low humidity conditions near the drill bit, based on the microwave reflection coefficient calculation model; S4: Establishing a simulation model for microwave reflection of the wellbore rock wall under low humidity conditions based on the quantitative calculation model; S5: Performing simulations across the entire frequency band according to the simulation model to determine the most reasonable band for the microwave detection method of wellbore rock humidity in gas drilling. This invention enables effective ultra-fast dynamic monitoring of humidity changes during drilling in low humidity ranges.

The composition includes a thermoplastic resin comprising a polypropylene polymer and about 0.15% to about 4.75% by weight of a filler comprising carbon nanotubes. The carbon nanotubes have an average diameter of about 5 to 15 nanometers (nm) and a density of at least about 100 square meters per gram (m 2 / gr) surface area, and 10 -3 The composition has a volume resistivity of 0.01E+1.0 Ohm.cm or less. The composition exhibits a volume electrical resistivity of 2.0E+14 Ohm.cm to 1.0E+03 Ohm.cm, and molded samples of the composition exhibit a percent power absorption of at least 65% measured in transmission mode at frequencies of about 75 GHz to about 110 GHz. Molded articles containing micron-sized features that provide the article with high absorption and low reflection properties are also described.

The invention relates to the technical field of electrical equipment monitoring, and discloses a multi-band microwave sensing electrical equipment on-line fault positioning method, which comprises the following steps of: acquiring microwave reflection / scattering signal data of electrical equipment as original data by adopting a multi-band sensor array; de-noising processing is carried out on the original data of each multi-band sensor to obtain de-noised data; performing data fusion processing on the de-noised data to obtain fused data; and establishing a visual map according to the fused data, extracting feature vectors from the visual map to perform node fault identification, obtaining fault identification results of a plurality of nodes, and predicting a fault development trend of each node of the electrical equipment so as to redeploy the multi-band sensor array. Through multi-band sensor array acquisition, data denoising fusion, visual map feature extraction and fault trend prediction, electrical equipment fault accurate positioning and sensor dynamic deployment are realized, the reliability and operation and maintenance efficiency of a power system are improved, and the fault risk and cost are reduced.

The invention provides substrate table system MPCVD equipment. The substrate table system MPCVD equipment comprises a microwave reflection table and a large molybdenum table which are arranged in a stacked mode. The substrate table is arranged on one side, far away from the microwave reflection table, of the large molybdenum table; wherein one side, far away from the microwave reflecting table, of the large molybdenum table is provided with an annular bulge, and the annular bulge is coaxial with the substrate table and surrounds the periphery of the substrate table. By means of the arrangement, the annular boss is arranged on the periphery of the substrate table, plasma formed above the substrate table can be evenly distributed, the temperature difference between the center and the edge is further reduced, it is guaranteed that the diamond growth rate is consistent, the stress of diamond crystals is reduced, and the cracking rate is reduced.

This invention relates to the field of optical imaging technology, specifically providing an optical radar co-aperture off-axis imaging system, comprising: an off-axis mirror assembly, a frequency-splitting device, a radar transceiver system, and an optical imaging system. The frequency-splitting device is disposed in the rear optical path of the secondary mirror and is used to reflect light waves and transmit microwaves. The frequency-splitting device includes a frequency-selective surface, which comprises an FSS pattern layer and a bias line layer. The FSS pattern layer includes periodically arranged FSS units. Nonlinear capacitors are electrically connected to the FSS units. The bias line layer applies a voltage to the nonlinear capacitors according to the received microwave band. By changing the voltage applied to the nonlinear capacitors, the resonant frequency of the FSS units is tuned, thereby changing the microwave passband frequency of the frequency-splitting device. This invention not only achieves a reflective wave-transmitting microwave design but also solves the problem that transmitting only a single band of microwaves in microwave-transmitting and light-reflecting methods is difficult to adapt to different task requirements.

The invention relates to a system and a method for measuring ballistic trajectories in a light-gas gun and an artillery, and the system comprises a first microwave source assembly, a first power amplifier, a first circulator, a horn antenna, a second microwave source assembly, a second power amplifier, a second circulator, a linear polarization antenna and a microwave reflection and transmission plate, the directions of microwaves emitted by the horn antenna and the linearly polarized antenna form an angle of 90 degrees, the microwave reflection and transmission plate is arranged on an angular bisector of the angle formed by the horn antenna and the linearly polarized antenna, and the microwave reflection and transmission plate enables short-wavelength microwaves emitted by the horn antenna to be directly transmitted to a target to be measured. And long-wavelength microwaves emitted by the linear polarization antenna can be reflected to a to-be-measured target according to an angle of 45 degrees. According to the system for measuring the ballistic trajectory in the light-gas gun and the artillery, long-wave microwaves are reflected on the front surface of forward gas, short waves are reflected on the surface of a projectile, and therefore long-distance, continuous and simultaneous measurement of the speed of the forward gas and the speed of the projectile is achieved.

The invention relates to a microwave apparatus (1) for continuous treatment of a flowing fluid medium. It comprises an enclosure (2) made of a microwave-reflective material and internally defining a microwave cavity (3) in which the fluid medium flows along a flow axis (A1); an input waveguide (4) extending along a propagation axis (A2) orthogonal to the flow axis and coupled to an input window (41) provided in the enclosure for propagation of microwaves entering the microwave cavity. The invention is characterised in that it comprises a measurement system for determining a symmetry indicator representing a symmetry of an electric field relative to the flow axis inside the microwave cavity, thus representing a centring of the electric field in the fluid medium. Knowledge of this symmetry indicator advantageously allows the symmetry of the electric field in the fluid medium to be controlled.

The application discloses a microwave intrusion detector testing system, method, equipment, medium and product, and relates to the technical field of nuclear security physical protection effectiveness testing. The system comprises a robot moving device, which is used for carrying a testing tool and a central control module, and performing a preset test motion track in a test site. The testing tool comprises a microwave reflector simulation unit, a posture monitoring module and a signal source unit, which are respectively used for simulating electromagnetic reflection characteristics, collecting real-time posture data of the microwave reflector simulation unit and transmitting microwave signals. The central control module is used for controlling the robot moving device and the testing tool, and sending the acquired test data to a data analysis module. The data analysis module is in communication connection with the central control module, and is used for analyzing the test data acquired by the central control module and generating a test report. Therefore, the application improves the accuracy of the test result of the microwave intrusion detector.

The utility model provides a device for reducing microwave reflectivity and protecting a magnetron and microwave heating equipment, the device comprises an integrated shell, a microwave excitation mechanism, a microwave circulator mechanism and a microwave water load mechanism, the integrated shell comprises a circulator shell, an excitation cavity shell and a water load shell which are integrally arranged; a microwave excitation cavity is arranged in the excitation cavity shell, and a magnetron of the microwave excitation mechanism is arranged on the excitation cavity shell; a water load mounting cavity for mounting the microwave water load mechanism is formed in the water load shell; a circulator mounting cavity for mounting a microwave circulator mechanism is formed in the circulator shell; according to the integrated shell, the microwave excitation mechanism, the microwave circulator mechanism and the microwave water load mechanism are integrated, the integrated shell is compact in overall structure, small in occupied space, light in weight and low in cost, assembling operation can be effectively simplified, the production process can be simplified, and meanwhile compared with an assembled structure, the integrated shell can unify resistance design and reduce resistance difference.

The present invention discloses a microwave reflection diagnosis method and system for non-uniform plasma sheath distribution based on the multi-peak point phenomenon. The method constructs a non-uniform plasma sheath electron density spatial distribution model by adopting a multi-layer double Gaussian distribution, establishes a reflection function of the plasma sheath using an equivalent transmission matrix, performs multi-Gaussian fitting on the reflection function and extracts key features in the fitting curve, and uses the key features as inputs of a neural network to diagnose the spatial distribution parameters of the plasma sheath. The system is used to implement the method. The present invention not only achieves dimensionality reduction of reflection data, removes redundant information and noise, and improves data processing efficiency through feature extraction technology, but also, by constructing a back-propagation neural network, only needs to focus on the most critical features, reduces training time and computational burden, and improves the accuracy and robustness of prediction results.

This invention discloses a method for measuring the magnetic field pitch angle using rotating Doppler microwave reflection. A Doppler backscattering meter (DBS) simultaneously transmits X-mode and O-mode polarized microwave signals to the plasma and receives the scattered signals returning along the transmitted optical path. A beam splitter divides the received scattered signals into two paths: one path enters the original DBS, and the other enters a rotatable antenna to adjust the vibration direction of the received electric field component. Based on the steady-state discharge conditions of EAST, a high-speed rotating platform rotates the rotatable antenna 360° during the stable discharge period, completing the scanning of the vibration directions of the electric and magnetic field components of the scattered signal, thus obtaining the magnetic field pitch angle at the detection frequency cutoff layer. This method is low-cost, causes almost no interference to the plasma, and allows for real-time, interference-free measurement of the magnetic field pitch angle at a localized location within the core of a magnetic confinement fusion device.

This invention discloses a method, system, equipment, medium, and product for wrapping tape in power distribution cable accessories, relating to the field of cable accessory manufacturing technology. The method involves microwave reflection detection of the section of the power distribution cable accessory to be wrapped, obtaining a corresponding first microwave reflection signal; wrapping tape is then applied to this section to obtain a wrapped tape section; microwave reflection detection is then performed on the wrapped tape section to obtain a corresponding second microwave reflection signal; an imbalance index is obtained based on the first and second microwave reflection signals; and the wrapped tape section is adjusted according to the imbalance index to obtain the target wrapped tape section. This invention solves the technical problem of existing technologies lacking non-destructive, real-time, and quantitative methods for detecting wrapping quality, which prevents timely identification of imbalance problems during the wrapping process and reduces the operational reliability of power distribution cable accessories.

The utility model relates to an embedded rail area signal radar speed measuring device for urban rail transit, which comprises a microwave reflecting device, the microwave reflecting device is a zinc-plated solid iron block, the zinc-plated solid iron block comprises a solid iron core and a zinc-plated layer plated on the surface of the solid iron core, and the surface of the solid iron core is coated with a metal coating. A counter bore used for installing an anchor bolt is formed in the galvanized solid iron block. The utility model has the advantages that: 1) the device is maintenance-free and high in reliability: the device is installed and fixed on a ballast bed by punching a chemical anchor bolt, so that the firmness of a reflector can be ensured, and the maintenance workload is basically avoided in the operation period; 2) the cost is low: the galvanized solid iron block is adopted, materials are universal and easy to purchase and install, and the steel rail and the ballast bed are not influenced; and 3) the generalizability is strong: when the embedded rail is popularized and used in the urban rail transit field, the radar microwave signal reflection quality can be effectively improved, the normal working requirement of a radar velometer can be met, and the application of the reflection device can effectively solve the problem of radar microwave reflection failure.

Provided in the present disclosure are a substrate stage system and an MPCVD apparatus. The substrate stage system comprises a microwave reflection stage and a large molybdenum stage, which are arranged in a stacked manner; and a substrate stage, which is arranged on the side of the large molybdenum stage away from the microwave reflection stage, wherein an annular boss is arranged on the side of the large molybdenum stage away from the microwave reflection stage, and the annular boss is coaxially arranged with the substrate stage and surrounds the periphery of the substrate stage. In this way, by means of the arrangement of the annular boss on the periphery of the substrate stage, plasma formed above the substrate stage can be relatively uniformly distributed, such that the temperature difference between the center and the edge is reduced so as to ensure that the diamond growth rate is consistent, thereby reducing the diamond crystal stress and thus also reducing the splitting rate.

The application relates to the field of semiconductor technology and discloses a microwave reflection photoconductance measurement system for wafer film carrier lifetime, which comprises a reconfigurable differential metasurface probe, which interacts with a wafer film to be measured in a near-field coupling mode; an optical excitation module, which performs pulsed light irradiation on the wafer film below a measurement area to generate non-equilibrium carriers; a dual-channel microwave transceiving module, which feeds microwave signals to the measurement area and a reference area; a closed-loop feedback control module, which receives the differential signal as input before the optical excitation module works; and a data acquisition and processing module, which collects transient changes of the differential signal after the optical excitation module works. The closed-loop feedback control module actively adjusts the microwave response of the reconfigurable probe reference area, the differential signal baseline is locked to zero before measurement, common-mode noise is suppressed, and the signal-to-noise ratio of the transient decay curve and the measurement accuracy are improved.

The invention relates to a plasma density profile inversion method, device and equipment, a storage medium and a program product, and relates to the technical field of plasma diagnosis. According to the invention, the efficiency and precision of density profile inversion can be improved. The method comprises the following steps: obtaining a microwave signal collected by a microwave reflectometer, extracting an intermediate frequency signal from the microwave signal, and modulating the intermediate frequency signal through an I / Q detector to obtain an I / Q signal; inputting the I / Q signal into a profile neural network model, and performing signal enhancement processing on the I / Q signal by an input coding layer in the profile neural network model to obtain an enhanced target I / Q signal; a backbone network in the profile neural network model performs feature extraction and feature enhancement on the target I / Q signal through a linear rectification module to obtain enhanced multi-scale features; and performing profile prediction by an output decoding layer in the profile neural network model according to the enhanced multi-scale features to obtain density profile distribution data of the plasma in the microwave reflectometer.

The embodiment of the invention discloses a reference standard-based joint defect type detection method and related equipment, and relates to the technical field of cable quality detection, in the application, a voltage amplitude error, a phase error value, a first mean value and a second mean value are used as defect-free reference standards to provide a rich data basis for judgment of defect types; by using the data, the change range and trend of the voltage amplitude and the phase can be comprehensively considered, and different types of defects can be effectively distinguished. Meanwhile, the microwave reflection technology has the characteristics of high sensitivity and high resolution, can detect early and tiny defects, overcomes the defect of low detection precision of a traditional method, can determine the positions of the defects through microwave scanning of a plurality of preset positions, and solves the problem that the traditional method is difficult to position.

The invention discloses a microwave concrete leakage humidity detection method and system based on machine learning, and belongs to the technical field of microwave detection. The method comprises the following steps: fixing a pair of microwave antennas on the surface of a detected concrete object, transmitting microwaves with fixed frequency through a transmitting antenna, and collecting microwave reflection signals through a receiving antenna; amplitude change and phase change of a microwave signal are output from the reflected signal through an IQ mixer and serve as characteristic quantities, and then the characteristic quantities are subjected to data smoothing processing and serve as humidity regression training samples; performing supervised learning on the humidity regression training sample by using a machine learning algorithm to generate a leakage humidity prediction model; obtaining a to-be-detected reflection signal of a to-be-detected object with unknown humidity by using the microwave antenna, and carrying out regression on the to-be-detected reflection signal by using the leakage humidity prediction model to obtain target leakage data of the to-be-detected object; according to the method, the detected leakage range is greatly increased, and a foundation is laid for the further application field of a microwave detection system.

The application relates to a plasma density profile inversion method, device, equipment, storage medium and program product, and relates to the technical field of plasma diagnosis. The application can improve the efficiency and accuracy of density profile inversion. The method comprises the following steps: acquiring a microwave signal collected by a microwave reflectometer, extracting a medium-frequency signal from the microwave signal, and inputting the medium-frequency signal into an I / Q detector to obtain an I / Q signal through modulation; inputting the I / Q signal into a profile neural network model, performing signal enhancement processing on the I / Q signal by an input coding layer in the profile neural network model to obtain an enhanced target I / Q signal; performing feature extraction and feature enhancement on the target I / Q signal by a backbone network in the profile neural network model through a linear rectification module to obtain reinforced multi-scale features; and performing profile prediction according to the reinforced multi-scale features by an output decoding layer in the profile neural network model to obtain density profile distribution data of plasma in the microwave reflectometer.

The invention discloses a road marking based on laser radar and millimeter wave radar recognition and a preparation method. The road marking comprises a subbase layer, a microwave reflecting layer, a bonding layer and an infrared reflecting layer which are sequentially arranged on a road surface from bottom to top. The subbase layer comprises a binding material; the bonding layer comprises a bonding material and titanium dioxide; the bonding material comprises the following components in parts by weight: 50 parts of methyl methacrylate, 50 parts of a cobalt naphthenate accelerant and 2 parts of dibenzoyl peroxide; the microwave reflecting layer comprises aluminum materials such as microbeads or aluminum sheets; the infrared reflecting layer comprises glass beads with the refractive index not smaller than 1.7. By introducing the infrared reflecting layer and the microwave reflecting layer, the reflecting performance of the road marking in an infrared band and an electromagnetic band is remarkably enhanced, and the probability that the road marking is identified by a multi-mode radar system can be remarkably improved, so that the intelligent sensing performance and the environmental adaptability of the road marking are remarkably improved; the method plays an important role in promoting the development of an intelligent traffic system and the popularization and application of an automatic driving technology.

The invention relates to a polyethylene pipeline hot-melt joint melting temperature defect identification method based on a microwave technology, and belongs to the technical field of polyethylene pipe hot-melt welding joint defect detection, and the method comprises the following steps: S1, scanning a polyethylene pipeline hot-melt joint area by using a microwave probe, and collecting a corresponding microwave reflection signal Ms; s2, converting the microwave reflection signal Ms in the S1 from a frequency domain to a time domain to obtain a time domain microwave signal Mt; s3, cutting off the time domain microwave signal Mt to obtain a cut-off time domain microwave signal Mx; s4, converting the truncated time domain microwave signal Mx from a time domain to a frequency domain, and recording as Mp; and S5, a judgment threshold value is set, the amplitude peak value in the Mp is compared with the threshold value, and the welding quality is judged according to the comparison result. According to the scheme, the cold welding and over-welding defects of the welding area of the polyethylene pipeline can be rapidly and accurately detected in a lossless state.

The present invention relates to the field of instrument measurement technology, and in particular to a radar waveguide device suitable for foam and turbulent eddy current liquid level detection. It aims to solve the current problems of low measurement accuracy, poor stability and high maintenance requirements caused by the turbulence of the liquid and the scattering and absorption of microwaves by foam when using microwave level meters to measure the height of liquid media in domestic foam and high turbulence media containers. The microwave level meter of the device emits microwaves, which are partially absorbed and partially reflected back when encountering a microwave reflector. The liquid level is measured by measuring the set parameter relationship between the transmitted wave and the reflected wave and the various operating spectrum diagrams of the microwave level meter. The present invention can effectively improve the problems of low accuracy and poor stability of various traditional static level meters when measuring media such as foam and turbulent eddy current levels, and has good practical application value.

The application discloses a relativistic magnetron with an energy feedback structure and belongs to the microwave technical field.The relativistic magnetron is a full-cavity extraction structure and comprises an anode, a cathode, an energy extraction structure and a guide magnetic field coil; wherein the energy extraction structure is provided with a ring-shaped microwave reflection plate in an output circular waveguide part, part of energy is reflected back to a cathode-anode gap, the interaction between an electron cloud and a space electromagnetic wave is enhanced, and the output power of the relativistic magnetron is improved. The application effectively improves the output power of the relativistic magnetron while guaranteeing the compactness of the device; meanwhile, the energy feedback structure is simple and easy to process.

The present application relates to food processing equipment and control technology field, disclose a kind of vacuum microwave crisp piece drying parameter intelligent optimization system, including vacuum drying cavity, microwave generating unit, vacuum moisture removal unit, pneumatic excitation unit, pneumatic impedance matching unit and main control unit, and pneumatic excitation unit constructs dynamic change pneumatic excitation response field in cavity;Pneumatic impedance matching unit is installed in microwave waveguide, based on the pressure difference change in field generates hardware linkage response, and transmission impedance is adjusted adaptively by mechanical displacement.Synchronous acquisition of main control unit transient pressure and microwave reflected power, solve the transient gas release impedance of the water release resistance and the net energy coupling factor of the hardware loss, according to this, identify constant-speed dehydration, puffing shaping and drying end point, and generate instruction dynamic adjustment excitation frequency or maintain negative pressure.The present application utilizes physical field coupling, realizes the non-contact monitoring of material drying state under vacuum environment and the self-adaptive precise matching of microwave energy.