77 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.

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 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 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.

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.

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 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 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.

The utility model relates to a linear guide rail for improving surface wave-absorbing coverage, which is characterized by comprising a rotary table, and a lower cover shell, an upper cover shell, a wave-absorbing material and an upright post which are arranged on the rotary table, the upper cover shell is fixed on the lower cover shell, the wave-absorbing material is arranged on the upper cover shell, and the upright post is fixed on the rotary table. The stand column is movably arranged on the rotary table and located above the wave absorbing material. In the working process, the servo motor drives the output shaft of the speed reducer to rotate, the speed reducer drives the gear to rotate, and due to the fact that the gear is meshed with the rack, the support and the sliding block can move on the linear guide rail. The wave-absorbing material mainly covers the linear guide rail, the gear rack and the transmission part, metal reflection in the testing process is reduced, the long translation shaft can cover the wave-absorbing material, microwave reflection is not caused, translation of the rotary table is not affected, errors caused by the metal reflection are effectively reduced, and therefore the testing accuracy is improved.

The invention discloses an XLPE cable joint damp assessment method based on an electromagnetic wave reflection fusion image. The method is mainly suitable for rapid and sensitive detection and assessment of damp of an XLPE cable joint. The method comprises the following specific steps: (1) measuring to obtain frequency domain reflection and microwave reflection results of a normal cable; (2) fusing the amplitudes and phases of the two electromagnetic wave reflections into a spatial three-dimensional image; (3) carrying out standardization processing on the spatial three-dimensional fusion image, and extracting image features of the spatial three-dimensional fusion image; (4) obtaining a spatial three-dimensional fusion image of the to-be-detected cable, and extracting image features of the to-be-detected cable; and (5) calculating a damp state evaluation index DSI, and judging the damp state of the connector of the XLPE cable. The method is easy to operate, efficient and high in sensitivity, can quickly and accurately evaluate the damp state of the XLPE cable joint, and has important significance in finding potential operation risks of the XLPE cable joint in time and guaranteeing safe and stable operation of a power system.

This invention discloses a microwave non-destructive testing device for grain moisture content. The device includes a shell, metamaterial lens antennas, a grain container, a 4.3-inch capacitive touchscreen, a coaxial cable, a near-infrared temperature probe, a microwave absorbing material plate, and a main control circuit board. The main control circuit board includes a main control chip, a 24GHz microwave transmitting circuit, and a 24GHz microwave receiving circuit. The main control circuit board is connected to symmetrical metamaterial lens antennas on both sides of the device via the coaxial cable. The device measures the change in scattering parameters between the two antennas using microwave signals, calculates the complex permittivity of the grain moisture content based on this change, and then uses a density-independent algorithm and a temperature calibration algorithm to invert the grain moisture content. The measurement results are displayed on the capacitive touchscreen. A microwave absorbing material plate is attached to the inner surface of the shell to reduce microwave reflection interference; a near-infrared temperature probe is used to quickly detect the grain temperature, reducing measurement errors caused by temperature.

The invention belongs to the technical field of pressure sore prevention and monitoring, and particularly provides a multi-mode pressure sore early warning system based on microwave reflection attenuation, a microwave sensing module is configured to emit a microwave signal to a tested tissue and receive a reflection signal, dielectric property change information of the tested tissue is obtained by analyzing an attenuation parameter of the reflection signal, and the dielectric property change information is used for detecting the dielectric property change information of the tested tissue. The skin humidity is inversed based on the dielectric property change information; the data fusion module is configured to receive and fuse the skin humidity from the microwave sensing module and the auxiliary parameters from the auxiliary sensing module to generate a fusion feature set; the risk assessment module calculates the fusion feature set to obtain a dynamic risk index used for representing the occurrence risk of the pressure sores; and the early warning unit generates and outputs a graded early warning signal based on the dynamic risk index output by the signal processing evaluation unit. According to the invention, non-invasive measurement of skin humidity can be realized, potential risks can be warned in advance, the evaluation model adapts to individual differences of patients, and misjudgment is significantly reduced.

The utility model discloses a portable biomedical waste innocent treatment device, which relates to the technical field of biomedical treatment and comprises a supporting disc, a microwave barrel is fixedly arranged on the upper surface of the supporting disc, a treatment cavity is arranged in the microwave barrel, a cover plate is arranged on the upper surface of the microwave barrel, and a driving box is fixedly arranged on the upper surface of the supporting disc. The driving box is located in the microwave barrel, a side gear is rotationally arranged in the microwave barrel, a motor is arranged on one side of the upper surface of the supporting disc, a driving column is fixedly arranged at the output end of the motor, the driving column penetrates through the driving box and is fixedly provided with a driving gear, and the driving gear is in meshed connection with the side gear; according to the portable biological medical waste innocent treatment device provided by the utility model, the microwave reflection ring is combined with the rotation of the treatment cavity, so that microwaves can act on medical wastes more uniformly, the innocent treatment efficiency and effect are greatly improved, treatment dead angles are reduced, and the medical wastes are ensured to be fully treated.

The application provides a coupling monitoring system and forming control method for a carbon fiber microwave reflector surface, a sensor lead is connected to a monitoring point on the microwave reflector surface, the sensor lead is connected to the microwave reflector surface through a hot press tank, an optical fiber grating sensor demodulator converts an optical fiber grating sensor signal into a digital signal and transmits the digital signal to a data acquisition processor for acquisition and processing; through the change of process parameters in the forming process of the microwave reflector surface, the coupling deformation data of the reflector surface is collected, and the process control parameters for ensuring the accuracy of the formed surface of the reflector surface are analyzed. The application realizes the deformation monitoring of the carbon fiber structure surface forming of the microwave reflector surface, optimizes the surface forming control parameters, effectively guarantees the surface accuracy and quality of the reflector surface forming, realizes that the root mean square accuracy of the surface accuracy of the reflector surface reaches 0.04mm, meets the reflection use of the microwave below the Ku frequency band, can be monitored throughout, and solves the influence of the concentrated stress caused by the uneven structure on the surface accuracy of the reflector surface.

The invention relates to the technical field of liquid crystal materials, in particular to a microwave metasurface unit based on a liquid crystal elastomer folding structure and a microwave device, the microwave metasurface unit comprises a metal microwave reflection structure and a liquid crystal elastomer orientation structure which are connected with each other, and the liquid crystal elastomer orientation structure is a Miura folding orientation structure. Wherein the metal microwave reflection structure comprises a plurality of metal microwave reflection units, and the plurality of metal microwave reflection units are connected with the centers of the plurality of panel units of the Miura folding orientation structure in a one-to-one correspondence manner. The microwave metasurface unit can solve the problem that the microwave metasurface unit is difficult to meet the requirements of light weight, flexibility and multifunctional integration.

The application provides a substrate table system MPCVD device, comprising: a microwave reflection table and a large molybdenum table which are arranged in a stack; a substrate table which is arranged on a side of the large molybdenum table away from the microwave reflection table; wherein the side of the large molybdenum table away from the microwave reflection table is provided with an annular protrusion which is coaxial with the substrate table and surrounds an outer periphery of the substrate table. In this way, the annular protrusion arranged on the outer periphery of the substrate table can make the plasma formed above the substrate table more uniformly distributed, thereby reducing the temperature difference between the center and the edge, ensuring the uniformity of the diamond growth rate, reducing the stress of the diamond crystal, and reducing the rate of splitting.

The present application relates to the technical field of nuclear fusion device, disclose a kind of microwave reflection mechanism of controllable nuclear fusion device, including first support seat, reflector, drive assembly and transmission assembly, reflector is rotatably connected to first support seat, reflector is used to reflect microwave beam, the input shaft of drive assembly is connected reflector by transmission assembly, drive assembly is used to drive reflector reciprocating swing, the axis of input shaft and the rotation axis of reflector are spatially staggered arrangement, transmission assembly includes first connecting rod, second connecting rod and spline universal joint unit, opposite ends of first connecting rod are respectively connected with one end of second connecting rod and reflector rotation, the other end of second connecting rod is fixedly connected with input shaft by spline universal joint unit, first connecting rod, second connecting rod and reflector form crank rocker mechanism and second connecting rod is the shortest rod.The microwave reflection mechanism of controllable nuclear fusion device of the present application embodiment, drive assembly does not need to frequently change direction.

The cooking device comprises an inner cavity, a hot air assembly and a microwave assembly, a cooking cavity is formed in the inner cavity, a mounting plate is arranged on the outer side face of the inner cavity, the mounting plate and the inner cavity jointly define a conveying cavity, and a conveying hole communicated with the cooking cavity and the conveying cavity is formed in the inner cavity; the hot air assembly comprises a driving motor, conveying fan blades and a heating piece, the driving motor is used for driving the conveying fan blades to rotate, the conveying fan blades and the heating piece are arranged in the conveying cavity, the driving motor comprises a motor body and an output shaft, the motor body is located outside the conveying cavity, part of the output shaft is located in the conveying cavity, and the conveying fan blades are connected to the output shaft; the microwave assembly comprises a microwave generator, the microwave generator releases microwaves towards the cooking cavity through the conveying cavity, and the surface layer of the conveying fan blade is a first microwave reflecting layer. The cooking device provided by the embodiment of the invention is low in production cost and high in plot ratio.