8 results about "Inhomogeneous material" patented technology

The invention relates to a material sound velocity measurement method based on an envelope cross-correlation algorithm, relates to the technical field of automatic detection, and solves the technical problem of serious waveform distortion interference in sound velocity measurement of an internal non-uniform material in the prior art. The method comprises the following steps: initialization setting and reference acquisition; performing point-by-point scanning on the current scanning surface of the tested sample to obtain sample echoes; drawing a sound velocity distribution diagram of the current scanning surface of the tested sample; rotating the sample to be measured and continuously measuring until the detection of the three orthogonal surfaces is completed; the average sound velocity of the tested sample is obtained. By applying the material sound velocity measurement method, scattering attenuation and frequency dispersion effect interference caused by material anisotropy can be eliminated, a period jump error caused by carrier phase ambiguity is reduced, the signal-to-noise ratio of a detection signal is effectively improved, automation and high repeatability of sound velocity measurement are achieved, and the measurement accuracy is improved. And the recognition accuracy of the small sound velocity difference is improved.

The invention discloses a partition temperature control and surface variable radiance integral structure, and relates to the field of integral structure stability treatment. Comprising an integral structure, partition heat insulation plates, a partition radiation heat source and a surface coating, the partition heat insulation plates are arranged outside the integral structure and arranged at corresponding positions according to the temperature partition requirements of the integral structure to form a plurality of temperature control areas, and the temperature control areas at least comprise a high heat treatment temperature control area and a low heat treatment temperature control area; the partitioned radiation heat sources are arranged in different temperature control regions; the outer surface of the integral structure is coated with surface coatings with different radiance; the overall structure is a heterogeneous material structure. The method is used for solving the problem of synchronous heat treatment of integral structure partitions of heterogeneous materials.

The invention relates to the technical field of industrial control, in particular to a shear parameter self-adaptive control method and system for a multi-hardness material, and the method comprises the steps: carrying out the pre-pressing of a to-be-processed material, applying a micro-amplitude disturbance signal, and extracting the complex impedance spectrum characteristics of a dynamic mechanical response to construct a frequency domain fingerprint of an internal heterogeneous structure; based on the fingerprint, predicting load abrupt change, and generating a virtual control track taking the displacement of the shearing tool rest as a benchmark; calculating a feed-forward torque compensation amount by using a prediction trajectory planner, and superposing the feed-forward torque compensation amount with a position feedback adjustment amount to generate an optimal blade gap and shearing speed cooperative motion instruction adaptively matched with the current hardness; according to the method, nondestructive detection of the internal hardness mutation of the material is achieved through the frequency domain fingerprint technology, the driving torque and the mechanical gap are synchronously adjusted before shear mutation occurs by means of a feedforward compensation mechanism based on inverse dynamics, and the problems of response lag and easy tipping in heterogeneous material processing are solved.

The present application relates to the field of industrial control technology, in particular to a shear parameter adaptive control method and system for multi-hardness materials, which comprises pre-pressing and applying a micro-disturbance signal to the material to be processed, extracting the complex impedance spectrum characteristics of the dynamic mechanical response to construct the frequency domain fingerprint of the internal heterogeneous structure; predicting the load mutation based on the fingerprint to generate a virtual control trajectory based on the shear knife holder displacement; using a predictive trajectory planner to calculate the feedforward torque compensation, superimposing it with the position feedback adjustment amount to generate the optimal blade gap and shear speed cooperative motion instruction adaptive to the current hardness; the present application realizes non-destructive detection of internal hardness mutation of the material through frequency domain fingerprint technology, and uses the feedforward compensation mechanism based on inverse dynamics to adjust the driving torque and mechanical gap synchronously before the shear mutation occurs, solving the problems of response lag and easy blade collapse in the processing of heterogeneous materials.

Method for performing a strain measurement on a component (10), wherein a strain gauge (12) is attached to the surface of the component (10) and the strain measurement on the component (10) is carried out using the strain gauge (12). The component (10) consists, at least in the area of ​​the component (10) where the strain gauge (12) is attached to the surface of the component (10), of an anisotropic and / or inhomogeneous material, wherein the anisotropy and / or inhomogeneity of the material is caused, at least substantially, by the fact that the material has components (14) which are arranged in the material in such a way that they form a regular pattern of periodically repeating structures.Before attaching the strain gauge (12) to the component (10), the pattern is detected with a detection device in an area where the strain gauge (12) is to be attached to the surface of the component (10), and the exact position and / or orientation in which the strain gauge (12) is attached to the surface is selected depending on the detected pattern.

The invention belongs to the technical field of computational material science and engineering simulation, and relates to a method and related equipment for generating a spatial continuous material attribute field from a heterogeneous material, and the method comprises the following steps: carrying out overlapping sampling in the whole domain of a voxel domain model, obtaining a plurality of overlapping representative volume unit samples, carrying out homogenization calculation, and obtaining a homogeneous material attribute field; obtaining each equivalent engineering constant set and a material principal axis direction vector, performing interpolation processing by adopting a multi-quadratic radial basis function, respectively generating a continuous engineering constant scalar field and a material principal axis vector field of each grid point in a global domain, establishing a global stiffness matrix under a global coordinate system, and performing inverse conversion to obtain a global stiffness matrix of the global coordinate system. The spatial continuous material attribute field of the heterogeneous material is obtained, the problems of continuity and physical rationality of spatial characterization of the attributes of the heterogeneous material are effectively solved, errors and inconsistency caused by manual intervention are greatly reduced, the repeatability and efficiency of data processing are improved, and the method is suitable for large-scale popularization and application. And automation and standardization of the whole process from microstructure data to macroscopic simulation input are realized.

A crushing tooth arrangement on the circumference of the two rollers or rotors of a roller or rotor crusher with crushing teeth arranged in rows of teeth, wherein a row of teeth is described by a shortest and geometrically simplest connecting line of all teeth in an axial direction and a radial direction running along the circumference of the roller or rotor, wherein the connecting lines of the rows of teeth (1) of the rollers or rotors are arc-shaped, continuously differentiable lines and have opposite offset angle profiles (8) in the axial direction, which correspond to the profile of an axial mass flow (8) required to homogenize an inhomogeneous material distribution (6) along the length of the rollers or rotors, characterized in that the rows of teeth (1) have parabolic profiles (10) in the axial direction.

This invention relates to a method for measuring the sound velocity of materials based on an envelope cross-correlation algorithm, belonging to the field of automated detection technology. It addresses the problem of severe waveform distortion interference in existing sound velocity measurements of internally inhomogeneous materials. The method includes the following steps: initialization settings and benchmark acquisition; point-by-point scanning of the current scanning surface of the sample to obtain sample echoes; plotting the sound velocity distribution map of the current scanning surface of the sample; rotating the sample to continue measurement until the detection of three orthogonal surfaces is completed; and obtaining the average sound velocity of the sample. Applying this material sound velocity measurement method can eliminate interference from scattering attenuation and dispersion effects caused by material anisotropy, reduce "period jump" errors caused by carrier phase ambiguity, effectively improve the signal-to-noise ratio of the detection signal, achieve automation and high repeatability of sound velocity measurement, and improve the accuracy of identifying minute sound velocity differences.