98 results about "Microwave imaging" patented technology

The invention discloses an oil-water well acidification continuous construction electric control system based on multi-parameter monitoring, and relates to the technical field related to acidification control in oil-gas field development, and the system comprises a multi-source data fusion monitoring module which integrates wellhead pressure, temperature, flow, pH value, H2S concentration and acid liquid conductivity, and an underground microwave imaging sensor carries out multi-physical quantity collection; a multi-objective optimization controller is designed, and the acid etching depth, the crack flow conductivity and the construction cost are balanced; the self-adaptive construction control module is based on a variable-frequency and variable-speed acid pump system controlled by a fuzzy sliding mode and is used for realizing stepless regulation of displacement; an intelligent shunting system is arranged, and acid liquor distribution is dynamically adjusted according to the suction volume of each layer section. According to the variable-frequency acid pump system based on fuzzy sliding mode control, stepless adjustment of the displacement is achieved; the intelligent flow distribution system dynamically prepares liquid according to the suction volume of each layer section; and through a three-stage safety interlocking mechanism, power can be cut off and emergency acid discharge can be started within 0.5 second when the temperature rise is greater than or the pressure suddenly changes, so that the well control risk is reduced.

The invention discloses a microwave nondestructive testing device and method for aging of a polyethylene pipe and appendages. The microwave nondestructive testing device comprises a microwave antenna, a multi-view camera, a control module and a display module. The microwave antenna transmits and receives signals to obtain internal structure information, and the multi-view camera captures high-resolution images for auxiliary analysis. The control module realizes multi-degree-of-freedom movement of the device, performs preprocessing, feature extraction and intelligent analysis on acquired signals, identifies aging features such as cracks, bubbles and layering through a deep learning algorithm, and remotely transmits data. And the display module displays the detection result and the aging evaluation report in real time. The device combines microwave imaging and camera images, realizes accurate defect identification, real-time monitoring and data comparison, supports automatic obstacle avoidance and pipeline safety evaluation, improves the detection precision and efficiency, and is suitable for aging detection of various types of pipelines and accessories.

The invention discloses a metasurface based on multi-unit periodic array distribution, the metasurface is mainly formed by periodically arranging a plurality of microstructure units, each microstructure unit comprises a subunit A1, a subunit B1, a subunit A2 and a subunit B2, the subunit A1 and the subunit A2 are in a central symmetry structure, and the subunit B1 and the subunit B2 are arranged in parallel. The subunit B1 and the subunit B2 are of a central symmetry structure, the wave absorber formed by the super-structure surface comprises a plurality of wave absorbing units which are arranged periodically, each wave absorbing unit comprises a conductive reflecting layer, a dielectric interlayer, a microstructure unit layer and a dielectric top layer which are sequentially attached from bottom to top, the electromagnetic wave absorption rate can reach 90% or above on the frequency band of 8.31-41.75 GHz, and the wave absorbing efficiency can reach 90% or above. The microwave absorber has the advantages of being flexible, easy to prepare, good in wave absorbing effect and beneficial to integration, and is suitable for being used in the technical fields of electromagnetic shielding, microwave imaging and the like, and most of electromagnetic wave energy entering the inside of the microwave absorber is lost under the action of dielectric loss and ohmic loss, and the microwave absorber has the advantages of being flexible, easy to prepare, good in wave absorbing effect and beneficial to integration.

The invention discloses a working temperature control method of a Josephson probe and a method for regulating and controlling the thickness of an Nb film, the working temperature of the Nb-based probe is increased to 7.2 K by regulating and controlling the film thickness parameter and controlling the working temperature of the probe, and the highest record of similar probes is created. According to the method for regulating and controlling the thickness of the Nb film, a four-groove quartz tube is selected as a substrate, and after ultrasonic cleaning, a nano needle tip is drawn by adopting a laser heating method, so that a needle tip structure with a clean surface and a controllable geometric structure is obtained; and horizontally fixing the prepared nano needle tip on a probe bracket, depositing a niobium film by adopting a magnetron sputtering process, and controlling the thickness of the Nb film to prepare the Josephson probe. According to the invention, the dependence of the probe on an extremely low temperature environment is obviously reduced, the limitation of the original process is broken, the available film thickness range is effectively widened, the preparation yield and the performance consistency of the probe are obviously improved, and a reliable device basis is provided for the practical development of near-field microwave imaging and quantum sensing technologies.

The invention discloses an X and Y polarization independent control programmable metasurface unit, and signal output is expanded through an IIC bus mode, so that each metasurface unit in a metasurface array can independently input an electric control signal. Two diodes are integrated in the X direction and the Y direction in the units respectively, 180-degree phase mutation can be achieved by changing voltages at the two ends of the diodes, and coding in the X direction and coding in the Y direction are independent and do not interfere with each other. The coding metasurface is constructed by utilizing the polarization independent control and programmable characteristics of the unit. The metasurface can achieve the holographic imaging effect through a specific coding array, and the holographic imaging real-time switching effect can be achieved by changing the output signal array of the FPGA. The metasurface can achieve dynamic holography under X polarization incidence and can also achieve dynamic holography under Y polarization incidence, polarization is independently controlled, the transmission amount of information can be increased through the characteristic, and the metasurface can also be used for a polarization encryption method in microwave imaging. The invention provides a new scheme for expanding a dynamic holographic channel.

The invention belongs to the technical field of digital image processing, and particularly relates to a self-adaptive layered confocal intracranial microwave imaging method and device and a storage medium. When antenna arrays with different antenna numbers and antenna arrangement structures are used, the algorithm can perform self-adaptive optimization antenna selection; the optimal calculation antenna pair is selected for imaging at different target positions, and intracranial layered imaging is achieved; the method comprises the following steps: calculating the transmission time when a microwave signal is transmitted from an antenna # imgabs0 # and received by an antenna # imgabs2 # after being reflected at a target point # imgabs1 #, calculating the propagation speed of the signal in the brain, introducing a gain coefficient, carrying out time shifting summation on reflected signals received by different antennas, reconstructing a relative grayscale image of a target area, and detecting an intracranial hemorrhage area. The imaging process is optimized by adaptively selecting the antenna combination, the algorithm performance and the image quality are improved, and the positioning error is reduced.

The invention, which relates to the antenna field, discloses a high-precision hybrid polarization microwave imaging antenna system comprising an H / V polarization independent radio frequency isolation network and a dielectric laminated orthogonal feed architecture. The H / V polarization independent radio frequency isolation network realizes isolation between H polarization and V polarization in the phased-array antenna and amplitude-phase consistency; the dielectric laminated orthogonal feed architecture is used for regulating and controlling near-field coupling energy distribution, so that H / V polarization field distribution is orthogonal to each other and shares the same phase center. According to the invention, an H / V polarization independent radio frequency isolation link and dielectric lamination orthogonal feed architecture is provided, the H / V polarization high isolation degree of a radio frequency link is guaranteed at a hardware level, and crosstalk among different polarization signals is effectively reduced; and meanwhile, through the flexible control time sequence design of hybrid polarization simultaneous emission, the high-efficiency integrated low-error delay T / R assembly and the common-caliber same-phase center antenna design, the amplitude and phase height consistency of H / V polarization signals is realized, and the imaging problem caused by amplitude and phase difference is avoided.

The invention relates to a dual-frequency polarization and modal multiplexing circular polarization vortex wave antenna design method, which only uses a layer of dielectric substrate, has the advantages of low profile, small size, light weight and the like, can adopt a mature PCB (Printed Circuit Board) manufacturing process, greatly reduces the processing cost, and is convenient for engineering realization. Through the design of the units and the array plane, reflection in the same rotation direction is achieved, the formed array plane has the characteristics of polarization multiplexing and modal multiplexing compared with vortex waves generated by a traditional same-aperture reflective array, and the defect that spectrum resources are insufficient in traditional wireless communication is overcome. The designed antenna can generate vortex waves with different polarizations and modal numbers in different frequency bands, the beam direction and the modal number can be regulated and controlled at will, and the antenna has great application prospects in the fields of wireless communication, target detection, microwave imaging, security encryption and the like.

Disclosed is a diamond quantum sensor-based breast cancer detection apparatus. The apparatus comprises a fluorescence reading apparatus, a microwave generation control apparatus, a laser generation control apparatus, a calculation control system, and a medical diagnosis station. A diamond microwave sensing probe in the medical diagnosis station is configured for radiating detecting microwaves to a target to be tested, and a camera is configured for photographing an image of said target and sending the image to the calculation control system. The microwave generation control apparatus is configured for generating a control microwave input into the diamond microwave sensing probe. The laser generation control apparatus is configured for generating a laser input into the diamond microwave sensing probe. The calculation control system is configured for calculating the intensity of a microwave scattered by said target and solving for the distribution of dielectric properties in said target. In the present invention, the NV center in diamond is used as a probe to measure a microwave field, so that high-sensitivity and high-spatial-resolution microwave imaging of cancerous tissue in mammary tissue can be realized.

A substrate edge detection system including a substrate material having the substrate edge with a surface; a coating disposed on the surface of the substrate edge; a probe in operative communication with the coating and the substrate edge; and a controller in operative communication with the probe.

The invention discloses a geosynchronous orbit sparse bunching SAR imaging mode realization method. The method comprises the following steps: constructing a geosynchronous orbit bunching SAR system wave position selection schematic diagram; designing a geosynchronous orbit sparse bunching SAR imaging mode wave position, and calculating mode parameters; calculating a yaw angle required by geosynchronous orbit SAR satellite zero Doppler attitude guidance; constructing a geosynchronous orbit sparse spotlight SAR imaging mode array antenna pattern model; and carrying out geosynchronous orbit sparse bunching SAR imaging mode performance analysis. According to the method, sparse microwave imaging and a geosynchronous orbit bunching SAR mode are combined, on the basis of an original SAR system, proper wave position design is carried out according to a more accurate zebra map to obtain a larger surveying and mapping bandwidth, the purpose of geosynchronous orbit bunching SAR high-resolution wide-width observation is achieved, and the method is suitable for large-scale popularization and application. And meanwhile, the system performance is improved in the aspects of reducing range ambiguity, inhibiting the influence of antenna rotation on azimuth ambiguity and the like.

The invention relates to the technical field of brain imaging, in particular to a microwave imaging detection method and device based on a fusion algorithm, electronic equipment and a medium, and the method comprises the steps: S1, collecting actual microwave scattering electric field distribution; s2, inputting the acquired actual microwave scattering electric field distribution into a Born approximation algorithm model, and performing inversion to obtain a first brain foreign body initial imaging result; s3, inputting the first brain foreign body initial imaging result into a deep learning neural network model to obtain first microwave scattering electric field distribution; s4, inputting the first microwave scattering electric field distribution into the Born approximation algorithm model again to continue iterative calculation to obtain a second brain foreign body initial imaging result, and inputting the second brain foreign body initial imaging result into the deep learning neural network model again to obtain second microwave scattering electric field distribution; s5, the microwave scattering electric field distribution is continuously iteratively updated in the step S4 until the difference value between the updated microwave scattering electric field distribution and the actual microwave scattering electric field distribution is smaller than a preset threshold value, and at the moment, the brain foreign body initial imaging result corresponding to the updated microwave scattering electric field distribution is a high-resolution brain foreign body imaging result; and S6, further judging whether the brain foreign body exists or not according to the high-resolution brain foreign body imaging result. According to the method, the microwave signal features are automatically extracted by using the deep learning model, and fine physical modeling is performed through the Born iteration method, so that the accuracy and reliability of detection are remarkably improved.

The present invention relates to the fields of optical imaging, microwave imaging, radar detection, sonar, ultrasonic imaging, and target detection, imaging recognition, and wireless communication technologies based on acoustic, optical, and electrical media. Specifically, it relates to a method for rapid imaging of curved arrays and its applications in these fields. The method of the present invention enables rapid imaging of curved arrays and is applicable to various non-planar and conformal arrays, enabling rapid imaging and target detection. Furthermore, the method of the present invention has the advantages of good compatibility, low computational complexity, excellent imaging quality, and a wide range of applications.

This application discloses an imaging method, apparatus, storage medium, and electronic device. The method includes: transmitting pulse signals to an object to be imaged from multiple transmission positions, and converting the received multiple target echo pulse signals into corresponding multiple complex signals; acquiring the round-trip time of the pulse signal transmitted from each transmission position to each of the multiple imaging positions corresponding to the object to be imaged, thus obtaining multiple round-trip times corresponding to each imaging position; performing coherent accumulation processing on the multiple complex signals based on the multiple round-trip times corresponding to each imaging position, thus obtaining accumulated data corresponding to each imaging position; and performing imaging processing on the object to be imaged based on the accumulated data corresponding to each imaging position to obtain an image. This application can realize microwave imaging.

A microwave imaging radar sensor for creating an image of at least a part of its surrounding space includes at least one transmitter unit, a receiver unit and an evaluation unit having an output port to output an image connected to the transmitter and receiver units. The image has fields related to a pair of a transmit channel and a receive channel, where at least two transmit channels and at least two receive channels each correspond to a fan shaped beam having a first dimension (D1) which is significantly larger than and perpendicular to a second dimension (D2). The field is assigned to a radar result characteristic (RC) provided by the receive channel whose fan shaped receive beam overlaps with the fan shaped transmit beam of the transmit channel defining an overlap area. The transmit channel correlates with the transmitter unit, which comprises a refractive beamformer having a transmit reference plane to which the fan shaped transmit beams of the transmit channels are perpendicular with their first dimension (D1). The transmitter unit embodies transmit transition structures associated with the refractive beamformer at different transition positions, so that each transmit channel is related to at least one transmit transition structure. The receive channel correlates with the receiver unit that has a refractive beamformer having a receive reference plane to which the fan shaped receive beams of the receive channels are perpendicular with their first dimension (D1). The receiver unit includes receive transition structures associated with the refractive beamformer at different transition positions, so that each receive channel is related to at least one receive transition structure.

The invention relates to the technical field of space imaging, and provides a space target space-based microwave imaging system design method and device. The method comprises the following steps: firstly, determining an intersection process of an observation satellite and a space target based on an orbit dynamics simulation method, and further determining an imaging observation window; determining beam scanning geometry by combining relative motion characteristics of an observation satellite and a space target in the imaging observation window and the maximum scanning capability of the phased-array antenna, and generating a beam scanning strategy; secondly, realizing accurate capturing and locking of a wave beam by optimizing an orbit forecast error of a space target; and finally, according to the beam scanning strategy and the optimized orbit parameters of the space target, high-precision imaging of the space target is realized in combination with a synthetic aperture imaging algorithm and error compensation, double-high-speed motion imaging feasible position determination can be realized, a stable and efficient phased array beam scanning strategy is constructed, and the imaging accuracy is improved. High-precision beam pointing of a non-cooperative target is realized, and the precision and reliability of space target imaging are improved.

This invention relates to the field of microwave imaging technology and discloses a nonlinear depth-sensing microwave imaging method and system. The method transmits microwave signals to the area to be imaged via a transmitting antenna and receives the corresponding high-dimensional echo signals via a receiving antenna array. Then, a pre-defined target nonlinear depth-sensing sub-network adaptively compresses the high-dimensional echo signals into optimal low-dimensional nonlinear measurement values; the dimension of the low-dimensional nonlinear measurement values ​​is smaller than the dimension of the high-dimensional echo signals. Finally, a pre-defined target physical embedding reconstruction sub-network performs nonlinear inverse scattering on the low-dimensional nonlinear measurement values ​​to obtain a high-resolution image of the area to be imaged. By combining the advantages of physical laws and deep learning through the target nonlinear depth-sensing sub-network and the target physical embedding reconstruction sub-network, this method not only possesses strong generalization ability and is applicable to various practical application scenarios, but also can handle microwave imaging tasks in complex scenarios, achieving high-resolution imaging.

This application relates to the field of space imaging technology and provides a method for decoupling translational and rotational motion in space-based microwave imaging of space targets based on parameter estimation. The method first uses adjacent cross-correlation and self-focusing methods to perform preliminary compensation for the translational motion components of the microwave imaging echo data. Then, using the first-order translational motion parameters fitted by the former as initial values ​​and minimizing the image entropy of the echo data as the cost function, it combines Keystone transform to optimize and compensate for the translational linear phase components. Next, it uses Keystone transform to compensate for the spatially varied range cell migration caused by the rotational motion components. Finally, it performs a second compensation for the residual translational motion components, obtaining echo data after almost complete compensation of the translational and rotational MTRC. By performing spatially varied phase error compensation and azimuth compression on this data, the imaging result of the space target can be obtained. This method achieves a balance between the efficiency and accuracy of parameter estimation, effectively improving imaging quality.

The application discloses a super-structure surface based on a multi-unit periodic array distribution, the super-structure surface is mainly formed by a plurality of micro-structure units arranged periodically, each micro-structure unit comprises a sub-unit A1, a sub-unit B1, a sub-unit A2 and a sub-unit B2, wherein the sub-unit A1 and the sub-unit A2 are in a central symmetric structure, and the sub-unit B1 and the sub-unit B2 are in a central symmetric structure; a wave absorber formed by the super-structure surface comprises a plurality of periodically arranged wave absorption units, each wave absorption unit comprises, from bottom to top, a conductive reflection layer, a medium interlayer, a micro-structure unit layer and a medium top layer; the wave absorber can realize more than 90% electromagnetic wave absorption rate on a frequency band of 8.31-41.75 GHz, and ensures no electromagnetic wave transmission, so that most of electromagnetic wave energy entering the wave absorber is lost under the action of medium loss and ohmic loss; meanwhile, the wave absorber has the characteristics of flexibility, easy preparation, good wave absorption effect and facilitation of integration, and is suitable for technical fields of electromagnetic shielding and microwave imaging.

The invention relates to the technical field of space imaging, and provides a space target space-based microwave imaging parameter optimization method and device. According to the method, through predicting a target intersection section of a detection satellite and a space target, an average relative speed, a minimum intersection distance and an orbit prediction error component of the detection satellite and the space target are extracted from the target intersection section; determining the optimized detection time length and the optimized detection frequency of the detection satellite at least based on the minimum intersection distance and the orbit forecast error component, and determining the optimized imaging time length of the detection satellite at least based on the average relative speed and the minimum intersection distance, and multi-constraint cooperative solution is carried out on the pulse repetition frequency PRF of the detection satellite at least based on the average relative speed and the minimum intersection distance to obtain the optimized PRF, microwave imaging parameter optimization design of quantitative model and actual scene constraint is realized, the efficiency is high, the application scene is wide, and the method is suitable for large-scale popularization and application. And powerful support is provided for precision improvement and engineering landing of a space-based microwave imaging technology.

The invention discloses an in-orbit calibration method for correcting self-radiation of a heat mirror of a microwave imager based on reference radiation. The method comprises the following steps: calculating an included angle between the heat mirror of the microwave imager and the sun; calculating the earth observation brightness temperature of the microwave imager; calculating the observed brightness temperature of the reference microwave radiometer; simulation brightness temperature of the reference microwave radiometer and the microwave imager is obtained based on radiation transmission model simulation; calculating an observation brightness temperature deviation and a simulation brightness temperature deviation, and calculating a system error between the reference microwave radiometer and the microwave imager; based on the system error, the included angle between the microwave imager heat mirror and the sun is adopted for function relation fitting, and the heat mirror self-radiation brightness temperature of the reference microwave radiometer is calculated; the included angle between the microwave imager heat mirror and the sun is calculated on orbit in real time, and the earth observation brightness temperature of the microwave imager is corrected based on the self-radiation brightness temperature of the heat mirror. The self-radiation of the heat mirror is solved in real time by taking double deviations of observation brightness temperature and simulation brightness temperature as constraints, and the problem that the temperature of the heat mirror of the microwave imager cannot be actually measured in orbit is solved.

The application discloses a low cross-polarization Vivaldi antenna and belongs to the technical field of electromagnetic fields and antennas. The low cross-polarization Vivaldi antenna comprises a dielectric substrate, a pair of radiation arms and a balanced radiation arm are arranged on the dielectric substrate, and the pair of radiation arms and the balanced radiation arm are oppositely arranged. Metal through holes are formed in the dielectric substrate, and the pair of radiation arms and the balanced radiation arm are electrically connected through the metal through holes. A dielectric director is arranged on one side of the dielectric substrate, and a reflecting floor is arranged on the other side of the dielectric substrate. The dielectric director is used for adjusting the phase difference of electromagnetic waves at the opening of the Vivaldi antenna. The reflecting floor is used for improving the front-to-back ratio of electromagnetic waves. Electromagnetic waves are radiated from the reflecting floor to the direction of the dielectric director. The application further reduces the cross-polarization level of the Vivaldi antenna and can be applied to the fields of satellite communication, ground penetrating radar, microwave imaging and UWB ultra-wideband communication.

The application relates to the technical field of space imaging, and provides a space target space-based microwave imaging system design method and device. The method firstly determines the intersection course of an observation satellite and a space target based on an orbit dynamics simulation method, and then determines an imaging observation window; then, the relative motion characteristics of the observation satellite and the space target in the imaging observation window and the maximum scanning capability of a phased array antenna are combined to determine a beam scanning geometry and generate a beam scanning strategy; next, precise acquisition and locking of the beam are realized by optimizing the orbit prediction error of the space target; finally, high-precision imaging of the space target is realized by combining a synthetic aperture imaging algorithm and error compensation according to the beam scanning strategy and the optimized orbit parameters of the space target, double high-speed motion imaging feasible position determination is realized, a stable and efficient phased array beam scanning strategy is constructed, high-precision beam pointing of a non-cooperative target is realized, and the precision and reliability of space target imaging are improved.

In Microwave radar imaging, obtaining high resolution microwave image from materials remains a challenge due to comparatively longer wavelength. Embodiments of the present disclosure provide a system for microwave imaging by Multiple-Input and Multiple-Output along with Synthetic Aperture Radar. A back-scattered signal is received from object at a target as an input. The back-scattered signal is rearranged to generate sub-array elements. A Fourier transform of the sub-array elements is computed by deploying two dimensional Fast Fourier transform to obtain two dimensional Fast Fourier transform of the sub-array elements. The 2D FFT of the sub-array elements is vectorized to obtain vectorized stacked sub-array matrix. The stacked sub band of the 2D FFT of the entire aperture array is reordered to obtain a two dimensional Fast Fourier transform of the entire aperture array. Three-dimensional reflectivity function of the target is estimated from the 2D FFT of the entire aperture array.

The invention is applicable to the technical field of microwave detection, and provides a microwave-based object detection imaging method and system, which comprises the following steps: acquiring microwave signal emission data, and acquiring a microwave propagation speed through a microwave type; microwave signal receiving data are obtained, the microwave signals are received through a receiver, the received data are processed, the processing modes comprise filtering, amplifying and denoising, and the processed data are sent to a terminal; performing imaging processing on the article according to the summarized information, obtaining electromagnetic characteristics of different materials, obtaining microwave signal reflection data, and determining a material type and an article structure according to the reflection data and the electromagnetic characteristics; the method comprises the following steps: acquiring multi-angle microwave data, performing three-dimensional reconstruction through the multi-angle microwave data, a material type and an article structure, and sending a three-dimensional reconstruction result to a terminal, thereby solving the problem that in the existing microwave imaging process, microwave signals cannot be processed to analyze the article structure and surface smoothness; and more real performance cannot be realized during three-dimensional imaging.

The invention relates to a small broadband microwave anechoic chamber based on a non-uniform artificial surface, the small broadband microwave anechoic chamber comprises a 36-polygon cylindrical shell, a broadband artificial medium wave-absorbing unit and a transmitting antenna, the broadband artificial medium wave-absorbing unit is attached to the inner wall of the 36-polygon cylindrical shell, edges are uniformly arranged on the 36-polygon cylindrical shell at intervals along the perimeter direction of the outer side of the 36-polygon cylindrical shell, and the transmitting antenna is arranged on the outer side of the 36-polygon cylindrical shell. A transmitting antenna is attached between every two adjacent edges, and the transmitting antennas are microstrip patch antennas. The broadband artificial medium wave-absorbing unit can effectively absorb 8-12 GHz electromagnetic waves incident at 0-70 degrees, has the advantages of multiple angles, broadband and high absorptivity, and provides a high-quality low-reflection test environment for scenes such as antenna measurement and microwave imaging which have strict requirements on the electromagnetic environment; the device is small in size, compact in structure and easy to install and integrate, the used materials are common materials, large-scale expansion is easy, and the device has the advantages of being passive, easy to machine and low in cost.

The invention discloses an expanded random irradiation phase-free microwave imaging method for generative adversarial network augmentation. An echo measurement value is obtained according to scattered echo processing, a real backscattering coefficient is obtained according to target scatterer processing, and a microwave imaging data set is constructed by matching with a fixed observation matrix; inputting the microwave imaging data set into a random irradiation microwave imaging network to obtain a trained random irradiation microwave imaging network; and inputting an echo measurement value of a to-be-measured target and the observation matrix into the trained network to obtain a backscattering coefficient of the target scatterer, and constructing a target scatterer image. According to the invention, the initial value generated by the generative adversarial network with physical characteristics is obviously superior to the initial value generated by the traditional spectrum method in the aspect of iteration stability, and benefits from the high-dimensional input after feature enhancement and the screening capability of the gating module in the iteration process; and the gated recurrent neural network can be quickly and accurately solved by virtue of a small number of iterations, so that high-quality image reconstruction is realized.

The usage of microwave imaging for biomedical (BMWI) applications is still challenging due to the imprecise reconstruction of the relative permittivity of tissues and the ill-posed inverse scattering problem. Anomaly detection in biological tissues demand in-vivo, non-invasive, and non-contact measurements. Considering and proving the anomaly as a point object in the microwave imaging is erroneous and results in false implications about the anomaly's presence, location, and characteristics. Present disclosure provides systems and methods for anomaly detection in biological tissues. An intensity map of target region is generated to detect tumor. Area around the tumor is processed to obtain a refined image. As the tumor is embedded in tissues of higher dielectric constant, image thus formed is larger in size than actual tumor. An iterative numerical computation method is implemented to estimate relative permittivity. Subsequently, the effective size of the anomaly is approximately estimated, which is close to their actual values.

The present invention belongs to the technical field of digital image processing, and specifically relates to an intracranial microwave imaging method, device and storage medium with adaptive hierarchical confocal. When using antenna arrays with different numbers of antennas and antenna arrangement structures, the algorithm can adaptively optimize antenna selection, select the best calculated antenna pairs for imaging at different target positions, and achieve hierarchical imaging of the intracranial region; calculate the transmission time of the microwave signal emitted from antenna #imgabs0#, reflected at the target point #imgabs1# and received by antenna #imgabs2#, calculate the propagation speed of the signal in the skull, introduce a gain coefficient, perform time shift summation on the reflected signals received by different antenna pairs, reconstruct the relative gray-scale image of the target area, and detect the intracranial hemorrhage area. The present invention optimizes the imaging process by adaptively selecting antenna combinations, improves the algorithm performance, image quality and reduces the positioning error.

The invention relates to a wearable breast cancer intelligent screening system which comprises a wearable detection unit which is symmetrically designed on two sides, senses resistance change under the action of external force or pressure through an integrated flexible sensing film, collects voltage through a sampling chip, calculates resistance and sends the resistance to a main control processing unit; the main control processing unit obtains the resistance data, controls transmitting and receiving antenna pairs in the antenna array and measures S21 parameters of the transmitting and receiving antenna pairs; and the PC generates a mammary gland internal dielectric characteristic image without deformation errors through various algorithms, and screens the breast cancer according to the image. According to the method, the flexible sensing technology and the microwave imaging technology are deeply fused, so that real-time sensing and self-adaptive correction of the geometric attitude of the antenna array are realized, and the accuracy and repeatability of a detection result are ensured.