411 results about "Isotropy" patented technology

The invention provides a magnetic resonance image self-supervision super-resolution reconstruction method and system based on a prior guide diffusion model. The method comprises the steps of image preprocessing, pseudo-pairing data set construction, prior condition construction, model training, model testing and three-dimensional isotropic volume reconstruction. According to the method, the dependence on a real high-resolution image is remarkably reduced by constructing a self-supervised pseudo-pairing mechanism, and high-quality reconstruction from anisotropic MRI to an isotropic image is realized; meanwhile, by introducing multiple medical priori including high-frequency residual, edge structure and region-of-interest guidance, detail retention and structural boundary definition of the image are effectively improved, the convergence speed and robustness of the model are improved while anatomical fidelity is guaranteed, and the method is suitable for large-scale popularization and application. And a technically feasible and clinically applicable solution is provided for high-resolution reconstruction of medical images.

The invention belongs to the technical field of computer vision and three-dimensional point cloud processing. The invention provides an anisotropic point cloud convolution method based on local geometric self-adaption. According to the embodiment of the invention, the principal component analysis is carried out on the neighborhood point cloud to estimate the principal direction of the local geometric structure, and the affine transformation matrix is constructed; and performing dynamic deformation on the basic kernel point of the convolution operator by using the matrix, so that the shape and the direction of the convolution kernel are dynamically aligned with the local structure of the point cloud. The convolution operator is integrated into a point cloud registration network, and can be used for feature extraction of three-dimensional point clouds, especially underwater multi-beam depth finder point clouds. The convolution operator constructed by the method can effectively capture the structure priori of the strong anisotropic point cloud, and solves the problems of structure information loss and limited feature extraction capability caused by the isotropic kernel processing the data.

The invention discloses an automobile manufacturing part surface defect tracing and positioning detection system, and belongs to the technical field of industrial defect detection. Comprising an isotropic scattering reference point module, the surface of which is provided with a specific micron-sized three-dimensional geometric structure; the multi-view synchronous acquisition module is deployed in the circumferential direction of an automobile part detection station, comprises at least three industrial cameras which are arranged in an elevation angle difference manner, and acquires a multi-angle original image with a reference point through a synchronous triggering acquisition device; the scattering feature intelligent positioning module is in signal connection with the multi-view synchronous acquisition module; the dynamic calibration compensation module is used for receiving the initial registration result output by the multi-view geometric resolving unit and correcting a scattering compensation coefficient of the reference point in a high-curvature area in real time according to curved surface curvature distribution; and outputting the corrected high-precision three-dimensional reconstruction data. Through a refraction compensation formula, material optical parameters and geometric curvature are fused, and positioning error multiple compression is achieved in high-distortion areas such as vehicle door ridges.

The invention discloses a method and device for measuring the center frequency of an ultrasonic longitudinal wave probe, and belongs to the technical field of ultrasonic detection. The method comprises the specific steps that an isotropic metal test block containing a specific flat-bottomed hole and a transverse through hole is manufactured, and the flat-bottomed hole and the transverse through hole are both located in a probe far-field region; by measuring the echo height (Hf) and time (tf) of a flat-bottom hole and the echo height (Hs) of a transverse through hole and combining the positions and sizes of the flat-bottom hole and the transverse through hole, the center frequency (f) of the probe is calculated based on a formula. According to the method, the sound field characteristic difference of the double reflectors is creatively used for counteracting the machining precision interference, the operation process is simplified, and the problems that a traditional method is high in equipment cost, complex in operation and limited in applicability are solved. The test block also supports multi-material adaptation (steel, aluminum, titanium alloy and the like) and is suitable for industrial sites and laboratory environments, and the detection efficiency and economical efficiency are remarkably improved.

The invention discloses a three-dimensional anisotropic grid generation method based on a streamline tracking topological structure, and relates to the field of numerical simulation of fluid mechanics, and the method comprises the steps: S1, carrying out the tetrahedral subdivision processing of a computational domain of an aircraft through employing a triangulation algorithm Delaunay, and achieving the isotropic grid subdivision of the computational domain; s2, using isotropic grid point information generated in the isotropic topological structure to construct a corresponding sign distance SDF resolving model so as to obtain a scalar field satisfying a Laplace equation; s3, calculating the gradient of the scalar field by adopting an SDF gradient solving method based on local least square fitting to obtain a corresponding gradient field; s4, performing streamline tracking in the gradient field to obtain a corresponding grid topological structure; and S5, constructing a structured hexahedral mesh covering the whole computational domain according to the mesh topological structure and the corresponding surface mesh. According to the method, theoretical unification and engineering feasibility of two-dimensional to three-dimensional grid structure mapping are realized.

The invention belongs to the technical field of metal material production, and relates to a 500MPa-grade ship plate with excellent isotropic performance and a manufacturing method, and the ship plate comprises the following components in percentage by weight: 0.030%-0.080% of C, 0.050%-0.200% of Si, 0.70%-1.20% of Mn, less than or equal to 0.005% of P, less than or equal to 0.003% of S, 0.040%-0.090% of Nb, 0.080%-0.180% of V, 0.0250%-0.0300% of N, 0.20%-0.50% of Cu, 0.30%-1.00% of Ni, 0.006%-0.025% of Ti, 0.015%-0.040% of Als, 0.0100%-0.0800% of La, and the balance of Fe and inevitable impurities. The method has the advantage that the performance isotropy of the steel plate is improved.

The invention relates to the technical field of industrial visual inspection, in particular to a 3D (three-dimensional) gluing glue type defect detection method based on three-dimensional measurement, which comprises the following steps: firstly, acquiring a point cloud by using three-dimensional measurement equipment, carrying out manifold pretreatment, constructing a substrate plane by fitting substrate data, and separating the point cloud of a glue strip based on the plane; secondly, extracting a geometric skeleton, searching a physical extreme point by using an isotropic spherical neighborhood, and decoupling the dependency of feature extraction and a slice direction; calculating a path differential attribute and an offset vector relative to a substrate plane, constructing a dimensionless centrifugal deformation index, and correcting a geometric tangent vector according to the dimensionless centrifugal deformation index to generate an anisotropic slice normal vector; and finally, obtaining a dynamic section based on the corrected normal vector, and quantifying defects by utilizing curvature mutation characteristics. According to the method, the geometric frame is corrected by constructing the dimensionless physical field, so that the section projection error caused by centrifugal force and gravity is effectively eliminated, and the detection precision of complex track 3D coating is remarkably improved.

The disclosure concerns a 3D printhead, a radiation emission device, and processes for additive fabrication and extrusion. The printhead comprises a radiating plate configured to transmit a thermal energy to the printing material deposited on a surface. A radiation emission device may be attached to an additive fabrication or extrusion device and comprising a radiating plate and a heating element. Additive fabrication and extrusion processes using a radiation for heating a surface for deposition of the material. Characteristics of products thus produced, such as porosity rate, warping, isotropy, maximum stress, internal stress, impact resistance, bending resistance, deformation at break, rigidity modulus, crystallinity rate, and impermeability are improved.

The invention relates to an aperiodic disturbance control vibration grid turbulence generation device, which comprises a vibration grid device and a flow field observation device, and is characterized in that the vibration grid device comprises a water tank frame, a water tank, a linear slide rail, a linear module, a vibration grid, a motor and a control system PLC module; the flow field observation device comprises an optical platform, an auxiliary LED lamp and a particle image velocity measurement system, wherein the particle image velocity measurement system comprises a high-speed camera, a laser and a computer. According to the invention, isotropic turbulence in a complex mode can be simulated, and the application range of equipment is expanded. According to the invention, the limitation of a vibration grating device based on periodic disturbance control is overcome, and a more flexible experiment platform is provided for turbulence mechanism research and application of the turbulence mechanism in the fields of material transportation, diffusion, sedimentation, flocculation and the like.

The invention relates to a single-objective isotropic three-dimensional super-resolution imaging method, which comprises the following steps of: outputting a linear polarization excitation light beam through a picosecond pulse laser, and outputting a linear polarization loss light beam through a nanosecond pulse laser, adjusting the polarization direction and power of the excitation light beam and the loss light beam by using a half-wave plate and a polarization beam splitter, enabling the loss light beam to enter a spatial light modulator, modulating a light field by loading a preset phase diagram, generating three focuses with different topological charges, axial positions and energy distribution, and outputting the three focuses. The high-order vortex phase retarder is used for carrying out polarization state modulation on the focus and separating loss light beams with different polarization components, the imaging resolution ratio smaller than 100 nm in the transverse direction and the axial direction is achieved, the transverse resolution ratio is similar to the axial resolution ratio, the three-dimensional real structure of an object can be accurately reflected when three-dimensional super-resolution imaging is carried out, and the imaging precision is improved. The imaging resolution is in direct proportion to the loss light intensity, and the higher the loss light intensity is, the higher the three-dimensional imaging resolution is.

The invention relates to an isotropic thermal neutron radiation field angle distribution uniformity control device and method, and the device is characterized in that a particle accelerator is used for emitting a high-energy charged particle beam with a beam position; the beryllium target is placed along the emission line of the high-energy charged particle beam, and the high-energy charged particle beam bombards the beryllium target to generate charges; the insulation isolation gasket is wound on the outer side of the beryllium target and prevents the charges from being led out from the outside through the beryllium target; and the adjusting assembly is connected with the beryllium target and used for acquiring the electric charge quantity on the beryllium target, and is connected with the particle accelerator and used for adjusting the angle of the high-energy charged particle beam irradiating to the beryllium target. According to the invention, the purposes of preventing the charges from being exported outwards based on the insulation isolation gasket and obtaining the charge quantity by the adjusting assembly to adjust the particle accelerator are achieved, so that after the insulation isolation gasket with low cost is used for isolation, the charge quantity is detected to adjust the particle accelerator, and the technical effect of effectively saving the cost is achieved.

The invention belongs to the technical field of polarization optics, and particularly relates to a metasurface and a polarization aberration compensation method based on refraction-metasurface hybrid design, and the method comprises the steps: S1, obtaining a to-be-compensated optical system; s2, performing parameter scanning on the metasurface; s3, obtaining a target phase of the metasurface; s4, obtaining two-direction attenuation and phase delay distribution of the polarization aberration at the exit pupil of the optical system to be compensated; s5, enabling the polarization aberration compensation function to carry out bidirectional attenuation compensation and phase delay compensation on the optical system to be compensated; s6, judging whether the bidirectional attenuation compensation result and the phase delay compensation result meet respective preset values or not; s7, analyzing wavefront phase distribution introduced by the anisotropic unit structure; and S8, enabling the sum of the phase of the isotropic unit structure and the phase of the anisotropic unit structure to be equal to the target phase of the metasurface. The invention provides an optical system polarization aberration compensation method with high applicability and high degree of freedom.

The invention discloses a preparation method of a high-aspect-ratio glass through hole and the glass through hole. The preparation method comprises the following steps: forming a photoresist mask on the surface of a substrate; performing a first etching step, performing isotropic first etching on the substrate by using plasma of a first gas from which charged particles are filtered, and forming a first polymer layer on the inner wall of the formed through hole and the photoresist mask for protection; performing a second etching step, performing anisotropic second etching on the first polymer layer on the bottom of the inner wall by using plasma of a second gas, exposing the substrate below, and performing the first etching again; after the first etching step for a first preset number of times is completed every time, performing a treatment process on the formed through hole; and repeatedly executing the first etching step, the second etching step and the treatment process until the through hole is formed in the substrate. The process can be simplified, the selection ratio can be improved, the efficiency can be improved, and better side wall smoothness can be realized.

A current sensor for detecting an electrical current in a line (LTG) comprises means for optical excitation and fluorescence analysis of non-magnetic centers (NV) or paramagnetic centers (NV) in isotropic sensor elements (SE1, SE2). Pump radiation (LB) with a specific wavelength and intensity is used to generate fluorescent radiation (FL), the intensity and time delay of which are measured relative to the pump radiation. The current sensor generates a magnetic field through the current flow, which floods the non-magnetic centers (NV) with different magnetic flux densities (B1, B2). The current value (ILTG) is determined from the detected fluorescence intensities and delays. A computing module (CTR) enables the evaluation, storage, transmission, or output of the data.

The application provides a design method of a bifocal self-correcting focal point scanning superlens, and belongs to the technical field of optical element manufacturing, and comprises the following steps: determining design parameters of the superlens; using a checkerboard strategy to reduce the design parameters of the superlens, and designing independent focal points in the superlens by means of rotating a single-layer super surface; using isotropy in an artificial atom library to establish a phase distribution library of the superlens; using a Jones matrix to optimize the phase distribution of the superlens according to the phase distribution library, and determining the spatial position of a focal point in a target unit structure; and according to the spatial position of the focal point in the target unit structure, a bifocal self-correcting focal point scanning superlens is designed through full-wave simulation and theoretical analysis verification. The superlens designed by the method can realize independent scanning of multiple focal points and multiple profiles, and provides a theoretical and practical application basis for the fields of industrial design, three-dimensional modeling, scanning and surface detection.

The invention belongs to the field of mechanical sensors, and discloses a full-plane six-dimensional force sensor. The sensor comprises a fixed table, a central loading table, eight radial beams and four circumferential beams which are arranged on the same central plane in the thickness direction, the radial beams are uniformly arranged between the central loading table and the fixed table at intervals along the circumferential direction; the radial beams which are symmetrical in pairs form a group of radial beams, two groups of radial beams which are perpendicular to each other are Fx-axis radial beams and Fy-axis radial beams respectively, and the other two groups of radial beams are Mz-axis radial beams and Fz-axis radial beams respectively; the four circumferential beams are matched with the four radial beams which are arranged at intervals one by one, and the circumferential beams are vertically and equally divided by the radial beams; the circumferential beams perpendicular to the Fx-axis radial beams are My-axis circumferential beams, and the circumferential beams perpendicular to the Fy-axis radial beams are Mx-axis circumferential beams; the strain gauges are divided into six groups, and each group of strain gauges form an independent full-bridge circuit. According to the invention, inter-dimensional crosstalk is eliminated from a mechanical structure, and the sensor has the advantages of high sensitivity, isotropy, strong overload capability and easy processing.

The invention discloses an image-based suspension bridge surface anomaly measurement method and measurement system, and relates to the technical field of optical measurement and image processing. The method comprises the following steps: projecting a first polarization grating and a second polarization grating with mutually orthogonal polarization directions to a to-be-measured area of the suspension bridge in a time-sharing manner; polarization information of reflected light is collected by adopting a polarization state imaging unit, and corresponding first and second Moire phase diagrams are generated. The data processing unit further performs double-path parallel processing on the two Moire phase diagrams: on one hand, a two-dimensional inclined field representing the macroscopic contour of an object is solved through a joint solution algorithm; and on the other hand, through differential operation, microscopic optical anisotropy abnormal points caused by material stress, damage and the like are identified and positioned by utilizing symmetrical response of the optical isotropic surface to the orthogonal grating. The method realizes synchronous decoupling of geometric and physical characteristics from a single data source through one-time measurement, has the advantages of non-contact and high efficiency, and is suitable for precise detection of large-scale structures such as a suspension bridge and the like.

The present invention proposes an isotropic material plate impact positioning method based on a wavenumber domain response function, which belongs to the field of aircraft technology and solves the problems of low positioning accuracy and robustness of existing impact positioning methods. The steps include: calculating the dispersion curve of the guided wave according to the material properties and geometric dimensions of the detected part; selecting a preset frequency range, constructing a wavenumber-angle relationship function, and combining it with the frequency curve to obtain a frequency-angle function; constructing a wavenumber domain response function, and performing Fourier transform on the wavenumber domain response function to obtain a spatial domain response distribution function; mapping the pattern presented by the spatial domain response distribution function into an electrode of a piezoelectric crystal to obtain a directional sensor with a frequency component filtered according to direction; rigidly connecting several directional sensors to the detected part, outputting the 1dB bandwidth of the response signal, and constructing a fan-shaped area for each directional sensor, and using the intersection area of ​​all fan-shaped areas as the positioning result of the impact point.

The invention relates to the technical field of machining part non-ideal surface generation, and particularly discloses a wavelet and fractal-considered assembly junction surface construction method which comprises the following steps: S1, according to an ideal mathematical model of an assembly junction surface, S2, comparing calculation methods of different fractal parameters, S3, aiming at the part assembly junction surface in different machining modes, calculating fractal fractal parameters according to a calculation method of the different fractal parameters; s4, the assembly junction surface is regarded as a structure formed by superposition of contours of different scales, S5, a power spectrum analysis method is introduced to analyze the surface contour curve characteristics of the assembly junction surface, and S6, according to the isotropic or anisotropic properties of the surface of the assembly junction surface in different machining modes, the surface contour curve characteristics of the assembly junction surface are analyzed. The statistical distribution characteristic parameters determined in the step S3 are introduced into characterization of the assembly joint surface; and S7, the contour curve characteristic parameters extracted in the step S4 are associated with the fractal parameters determined in the step S2. According to the method, multi-scale decomposition is carried out on the assembly joint surface through wavelet transform, and the specificity information of the roughness contour, the waviness contour and the shape error contour can be effectively extracted.

The present invention discloses a high-precision engineering calculation method and device for the back irradiance of a bifacial photovoltaic module, wherein the calculation method comprises the following steps: (1) inputting relevant parameter information of a photovoltaic power station; (2) simplifying the array into a two-dimensional diagram and calculating the sun position, including the zenith angle and azimuth angle; (3) calculating the ground shadow situation according to the module geometric information and the sun position; (4) calculating the sky viewing factor between rows that can be seen by each ground segment according to the array geometric parameters; calculating the incident angle according to the inclination angle, the module azimuth angle, the solar azimuth angle, and the zenith angle; using the Perez model to decompose the input horizontal direct irradiance and horizontal diffuse irradiance into direct, isotropic diffuse, circumsolar diffuse part, horizon scattering part, and ground reflection part; using the Perez model to calculate the inclined surface diffuse irradiance; (5) calculating the back irradiance after all the above steps are completed. This method simplifies the three-dimensional scene into two dimensions, and simplifies the View Factor method, back shadow analysis, sky view factor algorithm, accurately considers the irradiance received by the ground, and uses the angle-by-angle incidence loss to calculate the irradiance received by the back. It has both high accuracy and high efficiency.

The application relates to the technical field of non-ideal surface generation of machined parts, and particularly discloses a construction method of an assembly joint surface considering wavelet and fractals, which comprises the following steps: S1, according to an ideal numerical model of the assembly joint surface; S2, comparing calculation methods of different fractal parameters; S3, aiming at the assembly joint surface of parts under different machining modes; S4, regarding the assembly joint surface as a structure formed by superposition of different scale contours; S5, introducing a power spectrum analysis method to analyze the surface contour curve characteristics of the assembly joint surface; S6, according to the isotropic or anisotropic properties of the assembly joint surface under different machining modes, introducing the statistical distribution characteristic parameters determined in step S3 into the representation of the assembly joint surface; and S7, associating the contour curve characteristic parameters extracted in step S4 with the fractal parameters determined in step S2. Through multi-scale decomposition of the assembly joint surface by wavelet transform, the specific information of the roughness contour, the waviness contour and the shape error contour can be effectively extracted.

The invention relates to the technical field of heat-insulating and demagnetizing refrigeration, and discloses a heat-insulating and demagnetizing refrigeration material based on a Trellis crystal lattice and a preparation method and application of the heat-insulating and demagnetizing refrigeration material. The chemical formula of the heat insulation and demagnetization refrigeration material based on the Trellis crystal lattice is Gd2GeB2O8. A magnetic test result of the Gd2GeB2O8 crystal shows that the magnetic anisotropy of the crystal material is relatively weak and tends to magnetic isotropy, and a long-range magnetic orderliness phenomenon is not observed above 1.8 K. And when adiabatic demagnetization is carried out under initial conditions that T is equal to 3K and B is equal to 7T, the material can reach the maximum negative magnetic entropy difference of 51.68 J * kg <-1 > * K <-1 >, which shows that the Gd2GeB2O8 has a better application prospect in a 3-17K temperature zone and a sub-Kelvin temperature zone.

The application provides a kind of multi-modal feature fusion-based harsh environment image enhancement and restoration method, belongs to image enhancement processing field;The method first obtains multi-modal image and calculates each modal degradation degree graph;Based on the degradation degree and gradient amplitude, a fusion weight is constructed, and the local dominant direction and coherence are obtained by structure tensor analysis;According to the coherence, the pixels are partitioned, and the adaptive processing of each modal gradient is carried out by using hard projection, isotropic fusion or soft projection strategy respectively;Based on the fusion weight, the processed gradient is weighted and fused, and the fusion gradient field is obtained combined with the enhancement factor g (x) ;Finally, an energy function containing pixel fidelity term and gradient fidelity term is constructed, and the enhanced fusion image is reconstructed by weighted least squares optimization;The application suppresses the contribution of blurred modal through degradation perception mechanism, and solves the gradient direction conflict through structure adaptive projection, which significantly improves the clarity and structure fidelity of multi-modal image fusion in harsh environment.

The invention discloses a face key point detection network training method, a face key point detection method and a medium, and belongs to the technical field of face key point detection, and the method comprises the steps: obtaining a face image data set; in the face image data set, each sample is a face image marked with key point coordinates; for each sample in the face image data set, key points in the sample are divided into boundary endpoints and boundary internal points, and coordinates of the key points are converted to a heat map coordinate system; under the heat map coordinate system, generating a true value heat map for each boundary endpoint by adopting isotropic Gaussian distribution, generating a true value heat map for each boundary internal point by adopting anisotropic Gaussian distribution, and forming a training data set by the face image and the true value heat map of each key point in the face image; and training a face key point detection network used for predicting a heat map of each key point in the face image by using the training data set to obtain a trained face key point detection network. According to the invention, the detection precision of the face key points can be effectively improved.

This invention relates to a dual-mode singularity sensing system based on phase jump, comprising a sensing module composed of alternating layers of hyperbolic metamaterials and isotropic first dielectric layers. The sensing module exhibits a continuous-domain bound-state phenomenon when incident light propagates, and this continuous-domain bound-state phenomenon includes the ability to split into a pair of reflecting phase singularities with opposite topological charges. This invention extends singularity sensing technology from single-mode to dual-mode, enabling independent two-step measurements and exhibiting higher robustness to environmental perturbations.

A method for classifying a subterranean formation includes rotating an ultrasonic logging tool in a borehole penetrating a formation. The ultrasonic logging tool includes an ultrasonic transducer and an array of spaced apart ultrasonic receivers deployed on a logging tool body. The ultrasonic logging tool measures an azimuthal shear slowness image and an azimuthal compressional slowness image while rotating in the borehole. The images are evaluated to classify the homogeneity / heterogeneity and isotropy / anisotropy of the formation.

In some implementations, an optical system comprises a multicore fiber having multiple cores arranged along one or more isotherms and an isotropic cooling environment housing the multicore fiber. In some implementations, the isotropic cooling environment includes a cold plate having a groove shaped to fit the multicore fiber and a structure to enclose the multicore fiber within the groove.

The present invention discloses a method for rapidly calculating the response of remotely detected while-drilling electromagnetic wave logging in complex formation structures, relating to the field of electrical logging technology for oil exploration and development. The method comprises the following steps: establishing a two-dimensional heterogeneous isotropic geological model of the complex formation structure; using a regional rapid and precise description method to divide the formation into a collection of triangular units and assign resistivity values; determining the calculation region through adaptive thresholding, segmenting the x and z directions, and sequentially assigning resistivity values ​​to the calculation region grids according to the segmentation points to generate a calculation model; obtaining a large sparse matrix linear equation system; solving the equation system using a hybrid solver to obtain the distribution of the spectral domain field; calculating the integral of the spectral domain field with wave number according to the inverse Fourier transform formula to obtain the spatial domain distribution of the electromagnetic field; and moving each logging point to obtain the while-drilling electromagnetic wave logging response curve for the complex formation environment. The present invention can effectively and rapidly calculate the electromagnetic field response of complex two-dimensional formations, improving the algorithm's adaptability and calculation speed.

This invention relates to a method for testing the fracture toughness of anisotropic eccentrically loaded single-sided notched tensile specimens, comprising: S1, establishing a two-dimensional plane stress model of anisotropic material ESET specimens; S2, mesh generation; S3, calculating displacement, strain, and stress field to obtain the stress intensity factor K and compliance C under different initial crack lengths and anisotropic material parameters; S4, establishing crack length calculation formulas and stress intensity factor calculation formulas based on compliance under different eccentric loading rates, initial crack lengths, and anisotropic material parameters. This invention allows for rapid and accurate measurement of crack length simply by measuring the deformation of the material under external force; it reliably extends the application range of standardized eccentrically loaded single-sided notched tensile specimens from traditional isotropic metals to modern advanced materials such as composite materials, additive manufacturing alloys, and rolled plates, while ensuring the calculation accuracy under anisotropic conditions.

The invention relates to the technical field of geological engineering survey, in particular to a hydraulic fracturing multidirectional ground stress measuring device and method.The hydraulic fracturing multidirectional ground stress measuring device comprises a device body, an extrusion mechanism, an angle adjusting mechanism, a pressure meter and an angle measurer, the device body is deployed in a drill hole, and the extrusion mechanism is arranged on the device body; the adjusting part of the angle adjusting mechanism is connected with the extruding part of the extruding mechanism; according to the invention, the independent angle adjusting mechanism and the extrusion mechanism are arranged, so that fracturing pressure can be applied to the rock wall in any selected direction in the drill hole, the hypothesis limitation of isotropy of the rock mass in the traditional method is eliminated, and the crustal stress of anisotropic rock masses such as shale and the like can be measured in multiple directions; and therefore, stress field data more conforming to actual geological conditions can be obtained.