344 results about "Stress control" patented technology

The invention discloses a brittle material laser cutting thermal stress control method and system, and the method comprises the steps: obtaining real-time temperature distribution through infrared thermal imaging, combining finite element analysis and material characteristic dynamic data, constructing a thermal stress and fracture relation model, carrying out the iterative calculation of a thermal stress out-of-control threshold through a lambda algorithm, and determining a regulation boundary condition. According to the boundary condition, laser parameters are optimized, synchronous cooling airflow is introduced, the temperature gradient is dynamically controlled through an airflow pressure adjusting algorithm, historical data are processed through a convolutional neural network, the optimal laser parameter combination is predicted, in the cutting process, the microcrack diffusion state is monitored in real time, and auxiliary technological parameters are finely adjusted when necessary. The problem of fracture caused by out-of-control thermal stress in laser cutting of the brittle material is effectively solved, the cutting quality and efficiency are improved, and a new technical scheme is provided for precision machining of the brittle material.

The invention discloses a stress balance regulation and control device, system and method for a prestress supporting system, relates to the technical field of stress regulation, and can solve the problem that the prestress supporting system carries out targeted stress balance regulation and control on a soil body around a deep foundation pit. The stress balance regulation and control method of the prestress supporting system comprises the steps that the pressure ratios of a plurality of pressure sensor sets are obtained, and a pressure ratio matrix of the pressure sensor sets is constructed; judging whether a pressure unbalance risk area exists or not according to the pressure ratio matrix, if yes, giving an alarm, and if not, repeating the steps; determining a regulation and control node group based on the pressure imbalance risk area; a control signal is issued to the corresponding stress regulation and control unit, and a stress regulation and control action is executed; acquiring a pressure ratio corresponding to the pressure imbalance risk area, and constructing a temporary pressure ratio matrix; and judging whether the pressure unbalance risk area is removed or not, if yes, outputting risk removal display and repeating the above steps, and if not, turning to a regulation and control node group determination step.

The invention discloses a silicon substrate gallium nitride wafer containing a large mismatch stress regulation and control structure and a preparation method and application thereof, and relates to the technical field of semiconductor materials. The silicon substrate gallium nitride wafer containing the large mismatch stress regulation and control structure is formed by stacking a silicon substrate, an aluminum nitride amorphous film barrier layer, an ultrathin porous aluminum oxide weak bonding decoupling layer, an aluminum nitride single crystal film nucleating layer template layer and a gallium nitride single crystal film quality improvement layer in sequence. According to the invention, by regulating and controlling the pore size and pore density in the ultrathin porous alumina weak bonding and decoupling layer, the weak bonding and decoupling effect of the aluminum nitride single crystal film nucleating layer template layer on the ultrathin porous alumina weak bonding and decoupling layer is regulated and controlled; and therefore, large mismatch stress regulation and control of the silicon substrate gallium nitride material are realized, and the crack-free thickness, the material crystallization quality and the material preparation efficiency are improved. The silicon substrate gallium nitride wafer containing the large mismatch stress regulation and control structure can be applied to development and production of gallium nitride-based power electronic devices, microwave radio frequency devices and optoelectronic devices.

The invention relates to the technical field of beam bridge splicing, in particular to a large-span concrete continuous beam bridge splicing construction method based on intelligent construction. The method comprises the following steps: acquiring digital modeling data of a left bridge and a right bridge to be spliced; analyzing the digital modeling data, and determining the dynamic stress distribution of the whole construction process; acquiring deformation monitoring data in real time, analyzing the deformation monitoring data, and determining a coordinated deformation rule of the left and right bridges; and generating a splicing construction scheme according to the dynamic stress distribution and the coordinated deformation rule. And the decoupling problem of a digital model and a physical entity is eliminated. The problem of stress control blind areas is solved, stress space-time evolution is quantified, it is ensured that stress prediction covers all stages of construction, and the blind areas of a conventional static model are avoided. The problem of quantitative deficiency of the coordination deformation rule is solved, and the defect of neglecting the deformation coordination is avoided. The problem of construction decision lag is solved, the structural damage probability and temperature cracks are reduced, and coupling of construction execution and a physical mechanism is ensured.

The invention discloses an oxide thin film post-processing method based on multi-stage cooling annealing, and aims to actively regulate and control thin film stress while repairing oxygen vacancies through a precisely designed heat treatment process. According to the method, the problem that stress control and defect repair are difficult to consider in the annealing process is solved, and a solid theoretical basis and scientific basis are laid for preparing low-absorption and high-stability oxide intense laser thin film devices.

Embodiments of the present disclosure include methods and apparatus for depositing a plurality of layers on a large area substrate. In one embodiment, a processing chamber for plasma deposition is provided. The processing chamber includes a showerhead and a substrate support assembly. The showerhead is coupled to an RF power source and a ground and includes a plurality of perforated gas diffusion members. A plurality of plasma applicators is disposed within the showerhead, wherein one plasma applicator of the plurality of plasma applicators corresponds to one of the plurality of perforated gas diffusion members. Further, a DC bias power source is coupled to a substrate support assembly.

A borescope includes an inspection tube with the following features. The inspection tube includes an actuable portion nearer a distal of the inspection tube than a proximal end of the tube. Actuatable drive cables extend a length of the inspection tube. The actuable drive cables are attached to a distal end of the inspection tube and are arranged to transfer motion to the actuable portion. A force sensor is coupled to each of the actuable drive cables. An inspection head is attached to the distal end of the inspection tube. The control unit is configured to receive a signal from the force sensor. The signal is indicative of stress within the actuable drive cables. The controller is configured to actuate the actuable drive cables to provide slack in response to the signal indicating stress within the actuable drive cables exceeding a specified threshold.

The invention discloses an aero-engine blade laser shock remanufacturing method based on digital twinning, and belongs to the field of deep transfer learning, and the method comprises the steps: collecting cutting force, vibration, temperature and other multi-modal data for the non-uniform stress distribution caused by tool wear, and constructing a monitoring system; and feature alignment is performed on different working condition data by using a maximum mean difference method, a wear diagnosis and stress prediction model is constructed in combination with deep transfer learning, and a stress concentration area is identified. And laser shock strengthening remanufacturing is implemented in a stress concentration area, shock parameters are optimized, a small sample data set is expanded in combination with an adversarial generative network, and the remanufacturing adaptability is improved. Incremental transfer learning is adopted, the model is dynamically adjusted based on a freezing-fine adjustment mechanism, and rapid optimization under the new working condition is achieved. The blade residual stress control precision and the machining stability are improved by firstly monitoring tool wear and stress distribution, then implementing laser shock peening and optimizing a remanufacturing strategy in combination with incremental transfer learning.

The invention belongs to the technical field of ultra-precision machining, and discloses a micro-fluidic chip based on the electroosmosis effect and a stress regulation and control method thereof.The micro-fluidic chip is internally provided with a plurality of solution channels, each solution channel is of a snakelike reciprocating structure, one end of each solution channel is provided with a channel inlet, and the other end of each solution channel is provided with a channel outlet; a plurality of inflection points arranged at intervals are arranged on one side, facing the bottom of the micro-fluidic chip, of the solution channel, the inflection points are close to the bottom of the micro-fluidic chip and are distributed on the micro-fluidic chip in the horizontal direction, and an electrode is further arranged on the solution channel. The electroosmosis effect and the microfluidic technology are combined, high-precision dynamic stress regulation and control are achieved through gradient flow channel design, a composite driving liquid formula and a hysteresis compensation algorithm, and the problems that pressure control response is delayed and precision is insufficient in a traditional polishing technology are solved; and a new technical approach is provided for ultra-precision machining of the large-aperture optical element for the inertial confinement nuclear fusion device.

The invention provides an intelligent fatigue life prediction method based on deep learning, and belongs to the field of fatigue life prediction. The method comprises the following steps: acquiring a data set containing failure cycle times and mechanical properties of various alloy metals under different loading paths under stress control, and preprocessing the acquired data set; constructing a fatigue life estimation deep learning model, and training the fatigue life estimation deep learning model by using the preprocessed data set; and performing fatigue life prediction by using the trained fatigue life estimation deep learning model. According to the method, the problems that a traditional empirical formula is large in error and is only suitable for specific materials, loading history or load states when used for predicting the fatigue life are solved, and high-precision life prediction under multiple materials and multiple working conditions is achieved through the deep learning model.

The invention belongs to the technical field of welding stress control, and discloses an inner floating disc splicing stress parameter optimization method and system. Real-time working condition information such as the construction stage, the accumulated stress level, the overall structure rigidity and field environment parameters is combined with a dynamic adjustment mechanism of a stress optimization priority set; therefore, the problem that global optimization control is difficult to realize under multi-target conflict, construction stage evolution, cumulative stress change and field environment disturbance is solved, and the effect of realizing continuous balance and global optimization control among the targets in the whole construction period is achieved.

The invention discloses a high-pressure expansion device for tunnel rockburst prevention and control and a construction method of the high-pressure expansion device, and belongs to the technical field of tunnel construction process equipment and construction processes. According to the high-pressure expansion device for rock burst prevention and control in the tunnel construction period and the construction method of the high-pressure expansion device, the structure is relatively simple, pressure relief treatment can be effectively conducted on tunnel rock burst high-risk areas, and rock burst is reduced or even prevented. The high-pressure expansion device comprises a shell structure, a control assembly and an expansion reaction generator, the control assembly and the expansion reaction generator are both arranged in the shell structure, and the expansion reaction generator starts to react to generate high-pressure gas under the control of information, obtained by the control assembly, of deformation of tunnel rock mass along with tunneling. And the high-pressure gas is used for breaking the tunnel rock mass according to the set bursting pressure to release stress to control rockburst.

The utility model discloses a unit stress adjusting device used when substrate glass is prepared through an overflow method, and belongs to the technical field of liquid crystal substrate glass manufacturing. Comprising a plurality of stress adjusting units arranged on the two sides of substrate glass. The stress adjusting unit comprises a soaking plate and a cooling plate; a heating device is arranged in the vapor chamber; and the cooling plate is connected with a cooling water inlet pipe and a cooling water outlet pipe. A plurality of stress adjusting units are arranged on the two sides of the substrate glass, each stress adjusting unit comprises a soaking plate and a cooling plate, the substrate glass can be cooled or heated in different areas, stress adjustment is carried out, transverse and longitudinal temperature differences in the cooling process of the substrate glass are made up, the accuracy of stress control is improved, and the service life of the substrate glass is prolonged. In addition, the unitized independent cooling plate reduces the operation difficulty of the traditional process and improves the production efficiency.

The invention relates to the technical field of structural design of hydraulic structures, and particularly discloses a method, a system and a terminal for determining a combined lining of a high-pressure water delivery tunnel. In the establishment process of a numerical calculation model of the combined lining, a composite drainage plate is equivalent to a uniform isotropic entity medium with the thickness of d; the mechanical property of the composite drainage plate is represented by adopting a comprehensive elastic modulus E, the structural stress of the composite drainage plate and the water pressure bearing ratio in the steel pipe are restrained through a steel pipe allowable stress control threshold value, a pipe piece crack resistance allowable stress control threshold value and a steel pipe bearing ratio control threshold value, and finally the d / E value range of the composite drainage plate is determined. Through the mode, a scientific and clear basis is provided for the value of the composite drainage d / E in the combined lining, the problem that the value is obtained depending on experience at the present stage is solved, and the subjectivity of manual selection is avoided.

The utility model relates to the technical field of cold-shrink cable terminals, in particular to a composite cold-shrink cable terminal, which comprises an umbrella skirt, an insulating sleeve is fixedly connected to the inner side of the umbrella skirt, a stress control tube with a high dielectric constant is arranged on the inner side of the insulating sleeve, a sealing sleeve is arranged on the inner side of the stress control tube, and the sealing sleeve is fixedly connected with the umbrella skirt. A group of sealing sleeves are arranged on the base, a stress control sleeve with a high dielectric constant is fixedly connected between the group of sealing sleeves, and plastic spiral supporting strips are arranged on the inner sides of the sealing sleeves. The arc-shaped positioning blocks, the damping rods, the connecting shaft rods and the like are placed on the inner sides of the plastic spiral supporting strips, the supporting effect of the plastic spiral supporting strips can be enhanced through the arc-shaped positioning blocks, materials cannot be rigidly limited through cooperation of the damping rods and the springs, and therefore the situation that shrinkage is not in place due to material fatigue is reduced.

According to the machining method and system for the stainless steel rectangular groove plate, the material thickness and elastic modulus parameters of a 316L stainless steel thin plate are obtained, the stress distribution state in the machining process is monitored in real time through a sensor, and if the stress value exceeds a preset threshold value, the cutting force and machining speed parameters are adjusted; a support vector machine algorithm is adopted to analyze the nonlinear relation between the material thickness and the elastic deformation, and an optimized mechanical parameter control model is obtained; according to stress control data output by the mechanical parameter control model, the machining temperature and vibration frequency information of a contact area of a tool and a workpiece is obtained, if the vibration frequency exceeds a stable machining range, the rotating speed and the feeding amount of a spindle are adjusted in real time, and the influence of thermal deformation on the groove depth precision is corrected through a temperature compensation algorithm; and determining a dynamic processing parameter combination adapted to the characteristics of the thin plate. Intelligent control over the thin plate precision machining process is achieved, and the machining precision and efficiency are effectively improved.

The invention provides fatigue test equipment and a test sample S-N curve obtaining method, and relates to the technical field of material or part dynamic stress-fatigue life prediction.The fatigue test equipment comprises a vibration assembly suitable for assembling the first end of a to-be-detected test sample, the second end, far away from the first end, of the test sample piece is suspended outside the vibration assembly, so that an input load in the first direction is applied to the test sample piece; the counterweight assembly is detachably arranged at the second end so as to adjust the bending stress of the test sample piece; and the detection assembly is suitable for at least monitoring the strain of a stress calibration point, a stress control point and a stress monitoring point arranged on the test sample piece.

The invention relates to a deep tunnel support design method considering rock mass dynamic damage, which comprises the following steps: acquiring and dynamically updating rock mass in-situ mechanical parameters, engineering parameters and the like of a tunnel excavation surface in a strong earthquake region, and calculating to obtain rock mass dynamic damage and strength parameters by combining a GZZ three-dimensional dynamic strength theory; the method comprises the following steps: simulating a total stress-strain response process of surrounding rock under the action of three-dimensional static-dynamic coupling disturbance in a tunnel excavation process by introducing damage parameters of a dynamic disturbance rock mass and adopting a deep tunnel excavation static-dynamic coupling three-dimensional numerical model and a dynamic three-dimensional strength criterion; a stress control method is provided from two angles of dynamic force and static force to improve the stress state of a rock mass, so that the positive analysis support design of the deep tunnel under the conditions of blasting construction, strong earthquake or rock burst and the like is realized, and active control measures are adopted to realize active control of the stability of the surrounding rock of the deep tunnel in the strong earthquake area. Compared with the prior art, the method has the advantages that reliability and scientificity of dynamic analysis and support design of the deep tunnel rock mass in the strong earthquake area are improved, and the like.

The invention belongs to the technical field of simulation test devices, and particularly relates to a fine control device for simulating three-dimensional soil deformation of a subsidence basin in a coal mining subsidence area. A fine control device for simulating three-dimensional soil deformation of a subsidence basin in a coal mining subsidence area comprises an experimental box, a stress applying device and a control system, the experimental box is filled with soil, the control system controls the stress applying device to apply stress to the soil in the experimental box, and experimental data of the soil in the experimental box are monitored and recorded in real time. A plurality of mutually connected movable bottom plates are arranged in the middle of the stress applying device, a rotary movable part is connected to the lower part of each movable bottom plate, and stress is applied to the soil body in the experiment box body by adjusting the rotation angle of each movable bottom plate; the control system comprises an industrial control cabinet, an industrial control computer and control software. According to the invention, high-precision simulation of three-dimensional soil settlement deformation is realized through a multi-degree-of-freedom execution element and an accurate data feedback control system.

The invention discloses a stress control-oriented film coating process regulation and control method and system, and relates to the technical field of film coating process.The method comprises the steps of constructing a film coating task vector according to substrate feature information and film coating demand information of a lens to be coated, and conducting global credible search to obtain a film coating control scheme; introducing a stress-induced risk prediction architecture to carry out risk analysis; if the stress induction risk sequence does not meet the induction risk constraint sequence, establishing a coating optimization guide space; adjusting the coating control scheme, establishing a first coating adjustment space, performing induction risk optimization, and establishing a second coating adjustment space; and determining a coating regulation and control optimization strategy, and carrying out coating regulation and control on the to-be-coated lens. The technical problems that in the prior art, stress control of the coating process lacks global optimization capacity, optical performance and stress risks are difficult to consider at the same time, and the lens coating quality and reliability are poor are solved, and the technical effect of improving the lens coating quality and the coating process reliability is achieved.

The invention relates to the technical field of epoxy terrazzo terraces, and provides an epoxy terrazzo terrace system with a multi-layer composite anti-crack structure and a method, the epoxy terrazzo terrace system comprises a base layer, an anti-crack mortar layer, a three-layer composite anti-crack structure and an epoxy terrazzo surface layer which are sequentially arranged from bottom to top; the three-layer composite anti-cracking structure comprises an elastic resin layer, a rigid resin layer and a glass fiber cloth layer which are sequentially arranged from bottom to top. According to the epoxy terrazzo three-layer anti-crack structure based on rigid resin stress relay diffusion, the problems that an existing epoxy terrazzo system cracks frequently under the action of complex stress, the service life is short, and maintenance is frequent are effectively solved through a soft-rigid-fiber cooperative stress control mechanism.

The invention relates to a thin film, a thin film-photomask structure and a method of forming a semiconductor device. Provided is a thin film including a thin film film having improved stability to hydrogen plasma. The thin film film includes a network of a plurality of carbon nanotubes. At least one of the plurality of carbon nanotubes is surrounded by a multilayer protective coating including a stress control layer and a hydrogen permeation barrier layer over the stress control layer. The stress control layer and the hydrogen permeation barrier layer each include a Me-containing nitride or a Me-containing oxynitride, Me being selected from the group consisting of Si, Ti, Y, Hf, Zr, Zn, Mo, Cr, and combinations thereof. The Me-containing nitride or Me-containing oxynitride in the stress control layer has a first Me concentration, the Me-containing nitride or Me-containing oxynitride in the hydrogen permeation barrier layer has a second Me concentration, and the second Me concentration is smaller than the first Me concentration.

The invention discloses a manufacturing process of a radial magnetic flux cylinder type motor iron core, and particularly relates to the technical field of motor iron core manufacturing, and the manufacturing process comprises the steps: employing magnetron sputtering to construct a gradient insulation coating on the surface of a nanocrystalline strip, and enabling the gradient insulation coating and silicon steel sheets to be alternately laminated to form a magnetic conduction-bearing composite structure; a yoke bionic honeycomb runner and a tooth magnetic barrier groove are machined through femtosecond laser, and magnetothermal coupling optimization is achieved; multidirectional progressive stamping forming is conducted in the pulsed magnetic field environment, and grain directional arrangement and interface metallurgical bonding are achieved in combination with femtosecond laser micro-connection; the integrated eddy current detection system regulates and controls press fitting parameters in real time, and stress regulation and control are completed through two-stage microwave annealing and ion beam treatment. According to the method, the magnetic circuit efficiency and the heat dissipation performance of the iron core are effectively improved, through material-structure-process collaborative innovation, the problems of magnetothermal imbalance, grain disorder, assembly accumulative errors and the like in traditional manufacturing are solved, and the operation stability and the service life reliability of the iron core under the high-frequency and high-load working condition are remarkably improved.

The invention belongs to the technical field of geotechnical engineering and rock mechanics testing, discloses a stress-strain mixed control-based rock stable failure testing method, and aims to solve the problem that a stress path cannot be maintained and brittle failure cannot be inhibited simultaneously after rock peak strength is detected in an existing true triaxial test. The method comprises the following core steps: firstly, determining a target stress state and a strain growth rate threshold value; then hydrostatic pressure loading is carried out; loading and unloading at a fixed proportional rate in a stress control mode; and when the strain rate reaches a threshold value, switching to a stress-strain hybrid control mode, converting the maximum principal stress direction into strain control to stabilize the damage process, and dynamically coordinating stresses in the other two directions based on real-time feedback to enable the whole damage process to maintain a preset stress path all the time. According to the invention, the complete and stable test of the pre-peak-post-peak mechanical behavior of the rock under any complex stress state can be realized, and a key technical support is provided for accurately verifying the strength criterion and researching the failure mechanism.

The invention provides a method and system for controlling the line shape and stress of a steel box arch rib based on temperature influence, and the method comprises the steps: obtaining historical temperature data of a region where a to-be-built steel box arch rib is located and basic characteristic parameters of the steel box arch rib, carrying out the correlation analysis of the historical temperature data and the basic characteristic parameters, and constructing a target analysis model; acquiring a real-time monitoring temperature data sequence of a region where the to-be-built steel box arch rib is located based on the sensor period, and determining representative monitoring temperature data at different moments in each period based on the real-time monitoring temperature data sequence; and analyzing the representative monitoring temperature data at different moments based on the target analysis model to obtain linear and stress state characteristics of the to-be-built steel box arch rib at different moments, determining the optimal closure temperature of the steel box arch rib based on the construction requirements and the state characteristics, and controlling the linear and stress of the steel box arch rib based on the optimal closure temperature. And effective control on the line shape and stress of the steel box arch rib is realized.

The invention relates to the technical field of general control or regulation systems, in particular to a prestressed concrete cast-in-place continuous construction control system. Firstly, linear monitoring data and construction parameter monitoring data of the first N beam sections are obtained through the data monitoring module, linear prediction data of the (N + 1) th beam section are obtained through a GA-grey prediction model of the linear control module, and then stress prediction data of the (N + 1) th beam section are obtained through a time decay LSTM model of the stress control module. Finally, the self-adaptive learning rate is dynamically adjusted through a self-adaptive correction algorithm of the construction parameter control module, and the construction parameters of the (N + 1) th beam section are corrected. According to the system, through mutual cooperation of the data monitoring module, the linear control module, the stress control module and the construction parameter control module, accurate linear control, stress control and construction parameter control are achieved, and then it is guaranteed that the implementation control module can complete reliable and stable construction control.

The invention provides a surrounding rock stress regulation and control method based on near-far field pressure relief. Aiming at the problem of surrounding rock instability caused by high ground stress and mining disturbance of a deep roadway, a grading response technical system is provided. Near-field regulation and control are achieved through high-strength active and passive composite supports (anchor net shotcreting and a steel tube concrete support), plastic zone form monitoring and differential pressure relief: based on dynamic monitoring of the radius of a surrounding rock plastic zone, a mining influence index K is calculated, and when 1 < = Klt; 2, a borehole pressure relief and wall back yielding layer cooperative control technology is adopted, and when a plastic zone distortion part does not change to a butterfly-shaped plastic zone, the plastic zone distortion part is induced to uniformly expand to a circle; when K is larger than or equal to 2, a far-field air cannon presplitting roof cutting technology is combined, the roof cutting technology forms a full-section crack along a weak surface of a rock body through a high-pressure gas sealing cavity, a mining-induced stress transmission path is cut off in advance, traditional static design limitation is broken through, gas presplitting is adopted for replacing blasting / hydraulic roof cutting, and zero pollution and accurate and controllable energy in the construction process are achieved; and the top cutting depth is dynamically optimized along with the K value.

The invention discloses a steel structure product cutting control system, which relates to the field of industrial manufacturing technology, including: performing three-dimensional stress field modeling on steel structure parts to generate stress distribution diagrams of steel structure parts; setting initial cutting parameters based on the stress distribution diagram to perform preliminary cutting path planning; real-time monitoring of temperature distribution data of steel structure parts, combining with feedback of adjusted cutting motion parameters to detect local overheating and thermal stress concentration phenomena; based on the detection results, automatically adjusting the injection parameters of coolant through a thermal stress control mechanism; combining real-time vibration data and temperature data to recalculate the stress distribution of steel structure parts and dynamically adjust the cutting path; through temperature monitoring and thermal stress calculation, local overheating areas can be detected in real time, and the injection parameters of coolant can be automatically adjusted based on the thermal stress control mechanism to prevent the negative impact of thermal stress concentration on cutting accuracy and material integrity.

This invention discloses a temperature-compensated seepage-shear coupling true triaxial testing apparatus and control method. The apparatus includes a pressure chamber, a shear box, a temperature control system, a pressure application system, and a temperature-displacement corrector. The shear box is housed within the pressure chamber. The temperature control system includes a heat transfer jacket, multi-point thermometers, and a temperature controller. The heat transfer jacket is fitted over the shear box, and the multi-point thermometers are located within the cavity. The pressure application system includes a confining pressure loading device, a pressure head, and a pressure controller. The confining pressure loading device injects a confining pressure medium into the pressure chamber, and the pressure head applies a force to the shear box. The temperature-displacement corrector is electrically connected to the temperature control system and the pressure application system. This apparatus features a temperature control system to precisely regulate the temperature during the test, thereby simulating deep environments at different temperatures. Furthermore, the temperature-displacement corrector dynamically corrects the force applied by the pressure application system, reducing additional forces caused by thermal expansion or contraction and improving stress control accuracy.

The present invention discloses a silicon substrate gallium nitride wafer including a large mismatch stress regulation structure, and a preparation method and application thereof, and relates to the field of semiconductor material technology. The silicon substrate gallium nitride wafer including a large mismatch stress regulation structure is composed of a silicon substrate, an aluminum nitride amorphous film barrier layer, an ultra-thin porous aluminum oxide weakly bonded decoupling layer, an aluminum nitride single crystal film nucleation layer template layer, and a gallium nitride single crystal film quality improvement layer stacked in sequence. The present invention controls the pore size and pore density in the ultra-thin porous aluminum oxide weakly bonded decoupling layer, thereby achieving the weakly bonded decoupling effect regulation of the aluminum nitride single crystal film nucleation layer template layer thereon, thereby achieving large mismatch stress regulation of silicon substrate gallium nitride materials, crack-free thickness and material crystal quality, and improving material preparation efficiency. The silicon substrate gallium nitride wafer including a large mismatch stress regulation structure of the present invention can be used to develop and produce gallium nitride-based power electronic devices, microwave radio frequency devices, and optoelectronic devices.