145 results about "Surface pressure" patented technology

The invention relates to a rubber part finished product forming degree detection method, system and equipment and a medium, and belongs to the technical field of rubber part forming degree detection. The molding degree detection method comprises the following steps: receiving surface point cloud data and surface geometric position information of a to-be-detected rubber part; constructing a three-dimensional surface contour model of the rubber part to be detected; mapping the surface pressure distribution data to the three-dimensional surface contour model, and detecting a pressure abnormal distribution area; extracting light scattering characteristic data according to the optical image data; comparing the light scattering characteristic data with the pressure abnormal distribution area to obtain a defect area analysis result; dynamic deformation characteristics of the rubber part to be tested under the dynamic environment simulation test are obtained; marking the three-dimensional surface contour model, and constructing a comprehensive feature model of the rubber part to be detected; and carrying out difference analysis on the comprehensive feature model to obtain a feature difference result of the to-be-detected rubber part, and generating a forming degree scoring report of the to-be-detected rubber part. According to the invention, the molding degree of the rubber part can be accurately detected.

The invention relates to the technical field of intelligent control, and discloses a centrifugal machine and a control system thereof, and the system comprises an acquisition unit which acquires feeding data to determine an inner centrifugal speed and an inner and outer centrifugal speed difference; the judging unit is used for collecting solid discharging data within preset time and judging whether the centrifugal effect of the shot blasting medium is qualified or not according to the solid discharging data; if not, waste liquid discharge data and the surface pressure of the spiral blade are collected, and whether high-pressure gas is opened or not is judged; when it is judged that centrifugation is unqualified, the processing unit collects temperature data and vibration data in the centrifugal machine to determine real-time characteristic factors, the real-time characteristic factors are compared with historical adjustment data to determine adjustment coefficients, and the inner centrifugal speed is adjusted; the correction unit collects second solid discharging data running at the adjusted inner centrifugal speed and judges whether the adjustment coefficient is corrected or not; the storage unit stores the real-time feature factors and the adjustment coefficients. The stability, the separation effect and the adaptability of the centrifugal machine are improved, and the requirement for manual intervention is lowered.

The invention discloses a runner blade surface static stress neural network prediction method based on data driving, and the method comprises the steps: building a mixed-flow hydraulic turbine set full-flow-channel model, carrying out the grid division of the model, importing a grid corresponding to a working condition point into numerical simulation software, and obtaining runner blade surface pressure data; the method comprises the following steps: establishing a hydroelectric generating set shafting model, performing unstructured grid division on the model, inputting runner blade surface pressure data into an interface of a fluid domain and a solid domain to obtain runner blade surface static stress data and corresponding three-dimensional coordinates, and dividing the static stress data into a training set and a test set; and training the prediction model by using the three-dimensional coordinates, the water head and the opening corresponding to the training set, and inputting the three-dimensional coordinates, the water head and the opening of the working condition point into the trained prediction model to obtain the surface static stress of each runner blade under the working condition point. The method can correctly reflect the distribution trend of the static stress borne by the blade under all working conditions, and is high in precision.

The invention provides an active and passive combined microwave remote sensing detection method for earth surface air pressure and air pressure profile, which comprises the following steps: by combining a satellite-borne / airborne millimeter wave differential absorption radar and a satellite-borne / airborne microwave radiometer and utilizing oxygen differential absorption measurement, obtaining accurate land / ocean surface air pressure data; and the air pressure profile is further obtained by combining temperature and humidity profile data measured by a satellite-borne / airborne microwave radiometer. Compared with the prior art, the method has the advantages that active and passive microwaves are adopted for combined detection, detection information obtained by a microwave radiometer is complemented, calculation of the surface pressure is enhanced, and the surface pressure inversion precision is improved; according to the method, the surface pressure value can be obtained, and the atmospheric pressure profile can also be obtained. According to the method, accurate surface pressure detection can be realized, and the atmospheric pressure profile can be further deduced by combining the temperature profile and the humidity profile observed by the microwave radiometer.

The invention relates to a shape line optimization method and device and a plunger pump. The method comprises the steps that a current plunger pump simulation model is adopted to conduct simulated fracturing operation, surface pressure data corresponding to a bearing bush model in the simulated fracturing operation are obtained, if the surface pressure data do not meet a preset standard, deformation corresponding to the bearing bush model is fitted, a shape line model is obtained, and a bearing bush model is obtained; according to the shape line model, shape line parameters of the bearing bush model and / or the connecting rod model are adjusted, a next plunger pump simulation model is determined, and fracturing simulation operation is repeatedly carried out to obtain surface pressure data corresponding to the bearing bush model until the surface pressure data meet a preset standard; by adopting the method, the contact state between the inner surface of the bearing bush and the outer surface of the journal of the connecting rod is improved by modifying the bearing bush and / or the connecting rod without changing the macrostructure size of the bearing bush, so that the contact surface pressure between the bearing bush and the journal is more uniform, and the service life of the bearing bush is prolonged while the abrasion of the bearing bush is reduced and the cost is reduced.

The invention relates to the technical field of fluid mechanics modeling and aerodynamic acoustic analysis, in particular to a spectral orthogonal decomposition-based separated flow wall surface pressure pulsation dominant structure modeling method, which comprises the following steps of: acquiring a whole flow field and / or wall surface unsteady pressure data of a separated flow under a preset working condition; performing spectral orthogonal decomposition on the unsteady pressure data, performing frequency domain decoupling on multi-scale features, and extracting feature values and spatial dominant feature modes under each feature frequency; constructing a complex wave packet physical parameterized model, fitting the spatial dominant feature modals, and compressing the spatial dominant feature modals into sparse physical parameter vectors after nonlinear regression solution; and reconstructing a wall surface pressure pulsation dominant component based on the sparse physical parameter vector and the characteristic value, and carrying out at least one of flow mechanism analysis and pneumatic order reduction modeling according to the dominant component. Therefore, the problems of low reconstruction precision and the like caused by the fact that asymmetric evolution and variable acceleration convection of a large-scale structure in separation flow wall surface pressure pulsation cannot be accurately represented in a frequency domain in related technologies are solved.

The invention discloses a bidirectional fluid-solid coupling CFD and modal superposition ship water elasticity acquisition method and device, computer equipment and a storage medium, and relates to the technical field of ship water elasticity, in particular to the technical field of bidirectional fluid-solid coupling CFD and modal superposition ship water elasticity. The ship water elasticity acquisition method comprises the following steps: S1, establishing a rigid ship body drainage basin model of a target ship in a CFD solver, and performing grid discretization and physical condition setting; s2, establishing an elastic hull structure model in an FEM solver, and performing grid discretization and boundary constraint setting; s3, constructing a bidirectional coupling matching method, and associating grid information of the drainage basin model with grid information of the structure model; s4, performing numerical simulation on a coupling result to obtain a hull surface pressure field; and S5, transmitting the pressure field to the structure model, calculating a motion equation, and obtaining real-time response data reflecting water elasticity. The method is suitable for the fields of ship design, ocean engineering, water surface transportation and the like.

The invention provides a flow field surface pressure measurement method based on a reflection spectrum, relates to the field of high-speed flow field pressure measurement, and solves the problems of low spatial resolution, damage to a flow field structure, weak anti-electromagnetic interference capability, poor stability and the like of an existing high-speed flow field pressure measurement technology. The method comprises the following steps: designing a one-dimensional grating waveguide structure device based on a grating abnormal phenomenon in a grating theory, and preparing the designed one-dimensional grating waveguide structure device; carrying out pressure calibration on the prepared one-dimensional grating waveguide structure device, placing the device into a test pressure measurement system of a high-speed flow field after calibration is completed, and carrying out flow field pressure measurement on the surface of the model through a reflection spectrum of the one-dimensional grating waveguide structure device; the grating structure is designed through the pressure sensitive mechanism of the flexible grating structure, real-time measurement of the high-speed flow field pressure is achieved through reflection spectrum frequency movement, interference to the flow field is small, electromagnetic interference to the environment is small, the device is simple, and the measurement and maintenance cost is low.

The present invention suitably predicts a remaining life of a bearing. Provided is a bearing remaining life diagnosis method that predicts the remaining life of a rolling bearing which is for use in a rotary machine and which has inner and outer bearing rings and a rolling body between the bearing rings, said method comprising: a step for calculating the most recent estimated flaking length; and a step for calculating the most recent remaining life of the bearing on the basis of the most recent flaking length of a bearing ring. The step for calculating the most recent estimated flaking length includes a step for calculating the maximum rolling body load, a step for calculating the maximum contact surface pressure from the maximum rolling body load, and a step for calculating the most recent estimated flaking length of the bearing ring from the maximum contact surface pressure of the bearing ring.

The invention provides a rapid prediction method for a surface flow field of a high-speed train based on extremely sparse measurement data. The rapid prediction method comprises the following steps: (1) constructing a high-precision surface pressure distribution database; (2) extracting a dominant spatial mode of a training set pressure distribution matrix; (3) carrying out compressed sensing reconstruction; (4) obtaining an optimal sensor layout scheme by adopting an improved particle swarm optimization algorithm; and (5) establishing a rapid prediction model. The method is reasonable in conception, the high-precision surface pressure distribution database is constructed, the surface pressure field of the high-speed train under multiple working conditions can be accurately reconstructed, and the surface pressure distribution of the high-speed train under different working conditions can be rapidly and effectively predicted.

This application discloses a method for establishing a pressure distribution data prediction model, relating to the field of aircraft aerodynamic design technology. The method includes: dividing a reference pressure distribution dataset and operating conditions under various conditions into a training set, a validation set, and a test set; dividing the training set into training subsets corresponding one-to-one with grid regions; setting a reference neural network model for each grid region; adaptively expanding the training subsets based on a preset expansion region to obtain an expanded training subset; using the expanded training subsets within each grid region to obtain a reference neural network model with a mapping relationship between operating conditions and pressure distribution data; updating the preset expansion region using the validation set and jumping to the step based on the preset expansion region until a pressure distribution data prediction model for each grid region is obtained; testing the pressure distribution data prediction model using the test set, and if a first preset condition is met, it is the final prediction model. This method constructs a model to quickly and accurately predict surface pressure distribution data.

The utility model relates to oil seal detection frock technical field especially relates to a kind of floating oil seal surface pressure and torque on-line detection device, including pedestal, through-hole is provided in the pedestal, through-hole is provided with force transmission shaft, linear bearing is provided with the outer sleeve of force transmission shaft, the floating oil seal of being detected is set in the one end of force transmission shaft, sensor is set in the other end, and the sensor is used to measure the surface pressure and torque transferred by the force transmission shaft. By increasing linear bearing in pedestal, and change main shaft to linear optical axis, reduce the friction between shaft and support base, optimize the transmission accuracy of surface pressure value;By canceling the use of traditional torque sensor and pressure sensor, change to two-dimensional force sensor, torque value and surface pressure value can be detected simultaneously, and the sensor is set at one end of linear optical axis, all weight of frock is supported by support base, so that the sensor is not affected by other force values, further improve the detection accuracy.

The invention provides a testing device for balls, which comprises a support member and a panel, and is characterized in that the support member is of a spherical structure; the panel is detachably attached to the outer surface of the support member such that the panels having different surface patterns can be attached to the outer surface of the support member according to test requirements. According to the ball testing device provided by the invention, the influence of panels with various surface styles on the overall aerodynamic performance of a ball is researched in a controllable and accurate manner. The ball testing device can further comprise a pressure scanning device arranged in the supporting component and a through pressure measuring pipe formed on the panel, one end of the pressure measuring pipe is arranged at the static pressure hole, and the other end of the pressure measuring pipe is connected to the pressure scanning device, so that the surface pressure change of the ball can be directly measured; and more comprehensive and more accurate measurement data can be provided. The invention further provides a ball testing system.

A fastening support system (32) supports fastening between flanges. The fastening support system includes: a flange fastening portion (38) including a gasket (2) between flanges (10-1, 10-2); a fastening information extraction unit (8) that extracts, from the gasket, fastening information indicating the fastening state of the gasket when the flanges are fastened, the fastening information being extracted so as to be associated with position information of the flange fastening portion; a support information generating unit (information terminal 36) that compares a target value and the fastening state of the gasket and generates support information for fastening between the flanges; and a support information presentation unit (56) that presents the support information. As a result, fastening information of the gasket is extracted when surface pressure is received between the flanges, and support information for fastening between the flanges is generated using this fastening information.

The application discloses a high angle of attack nonlinear separated flow aerodynamic force correction method, which comprises the following steps: obtaining aircraft surface pressure distribution data at zero reduced frequency by using a DES method; dividing surface elements on the surface area of the aircraft, and generating an AIC matrix AIC by using a dipole grid method based on the geometric information of each surface element; obtaining the aerodynamic force and moment of each surface element according to the AIC, and generating an aerodynamic force matrix A DLM,k＝0 of all surface elements at zero reduced frequency by using the aerodynamic force and moment of each surface element; interpolating the aircraft surface pressure distribution data obtained by using the DES method to each surface element to obtain the aerodynamic force matrix A DES of all surface elements; obtaining a force correction matrix W according to A DLM,k＝0 and A DES ; correcting the AIC matrix AIC by using the force correction matrix W to obtain a corrected aerodynamic force influence coefficient matrix AIC * ; and performing aerodynamic force correction and aeroelastic calculation by using the corrected aerodynamic force influence coefficient matrix AIC * , so as to complete the high angle of attack nonlinear separated flow aerodynamic force correction. The application can have both the calculation precision of CFD and the calculation efficiency of an engineering method.

1. The name of the design product: tactile sensor. 2. The use of the design product: for detecting or sensing the surface pressure, shape and texture of the contacted object. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

Provided is a rotary electric machine that suppresses local increases in surface pressure generated on a stator by using a housing with improved circularity, and that improves reliability. The rotary electric machine of the present invention has a rotor, a stator, and a cylindrical housing that fixes the stator from the outer periphery side, the housing having a flange that extends in the outer peripheral direction on the axial end portion of the outer peripheral surface, the flange having a recess that extends in the circumferential direction.

The utility model relates to the technical field of environmental test equipment, and particularly discloses a window sealing device of a high-low temperature damp-heat low-pressure test box, which comprises a window frame, and a multi-sealing component, an elastic component and a buffer layer are arranged on the inner wall of the window frame; the multi-sealing assembly is composed of an outer-layer sealing ring, an inner-layer sealing ring and a middle supporting ring, the elastic assembly comprises a plurality of annular spring sets which are arranged on the outer wall of the extension plate and are annularly distributed, and the outer-layer sealing ring resists high temperature, chemical corrosion and friction loss and bears external environment pressure; low-temperature elastic compensation and deformation self-adaption capacity are provided through the inner-layer sealing ring, stress is dispersed in the middle of the supporting ring, the situation that single-layer sealing loses efficacy due to local overload is avoided, and therefore multi-layer sealing protection is achieved. The pre-tightening force of the annular spring set is transmitted to the supporting ring through the inner-layer sealing ring, overall supporting of the sealing structure is formed, and the annular array design of the annular spring set ensures that the pressure of the sealing face is evenly distributed.

The present invention provides a structure and processing method for arranging pressure measuring holes on the surface of a slat based on an embedded pipe form, and relates to the technical field of wind tunnel testing. The arrangement structure of the present invention includes a pressure measuring tube, and the slat is provided with a pressure measuring hole and a wiring groove, the wiring groove is arranged on the opposite side of the pressure measuring surface of the slat, and the pressure measuring tube is installed in the wiring groove along the extension direction of the wiring groove; the first end opening of the pressure measuring hole is located on the pressure measuring surface of the slat, the wiring groove has an initial end and an end, the second end opening of the pressure measuring hole is connected to the pressure measuring tube at a position of the wiring groove close to the initial end, and the axial direction of the pressure measuring hole is perpendicular to the tangent direction of the pressure measuring surface of the slat at the first end opening of the pressure measuring hole; along the initial end to the end of the wiring groove, the corresponding slat thickness gradually increases, and the end of the wiring groove leads to the inside or outside of the slat. The present invention can obtain a more complete pressure distribution of thin-walled components of an aircraft, which is conducive to more accurate evaluation of its aerodynamic performance.

The present invention relates to the technical field of deep-sea surface pressure-maintaining sampling, and particularly refers to a wire rope operation tool for achieving subsea surface pressure-maintaining sampling and its usage method. The wire rope operation tool for achieving subsea surface pressure-maintaining sampling in the present invention includes an eccentric hook connection mechanism, an inner tube differential control mechanism, an outer tube connected with a ball valve, a lower-end ball valve sealing mechanism, a core tube mechanism, a sampling tube, and a pressure-maintaining transfer cabin. Through simple wire rope lowering and lifting operations, the tool for achieving subsea surface pressure-maintaining sampling is lowered to the seabed and penetrates the seabed, the surface sample is lifted and sealed for pressure maintenance, the ball valve is closed quickly for pressure maintenance and disassembled when out of the water surface, and the pressure-maintaining transfer cabin is simply transferred by gravity, improving production efficiency, reducing the technical requirements for ships for surface pressure-maintaining sampling, and reducing production costs.

The present invention provides a method and system for detecting the three-dimensional pressure distribution of the lap joint surface of a demagnetization switch, comprising acquiring scanned data of the lap joint surface of the demagnetization switch, establishing a switch lap joint surface model, and performing theoretical pressure analysis based on the model construction to form pressure data of the demagnetization switch lap joint surface model; acquiring contact pressure data of the lap joint surface of the demagnetization switch, and performing pressure fitting analysis based on the acquisition position in combination with the switch lap joint surface model to form lap joint surface pressure acquisition distribution data; and performing pressure deviation analysis in combination with the lap joint surface pressure data of the demagnetization switch lap joint surface model and the lap joint surface pressure acquisition distribution data to form lap joint surface pressure detection and analysis result data. The method compares and analyzes the established demagnetization switch lap joint surface model data with the pressure data collected by the sensor to accurately analyze and determine the lap joint pressure condition of the lap joint surface.

The invention discloses a clean type efficient multifunctional valve pressure testing method, and relates to the technical field of clean valve pressure testing. Valves of the same specification, the same size and the same type are installed on a pressure testing table, a jack assembly and a valve flange are connected and pressed tightly, and high-purity nitrogen is supplied to a pressurizing assembly; high-purity nitrogen is fed into a control valve through the control valve to detect whether the flange surface leaks air or not and whether the joint leaks air or not, the control valve is closed after the pressure rises to a certain requirement, whether bubbles exist in each water bottle container or not is observed, and if no bubbles exist in a certain period of time, qualification is indicated; or whether pressure reduction exists in each pressure gauge or not is observed, if no pressure reduction exists in a certain time, the pressure is qualified, a jack assembly is used as sealing surface pressure, a connecting surface with a valve flange adopts a clean PTFE plate, the cleanliness of the valve is ensured in the pressure test process, the pollution risk to the cleanliness in the valve is reduced, and the pressure test table can test the pressure of four valves at the same time; the time is greatly shortened, the working efficiency is improved, and the pressure test construction efficiency is improved.

To provide a test device which can generate on a test piece, pressing force of any magnitude in a vacuum environment, and can generate pressing on the test piece at a uniform surface pressure for correctly measuring heat characteristics of the test piece.SOLUTION: A test device 1 is for measuring heat characteristics of a test piece 3 by pressing the test piece 3 to an object for acting a contact pressure to the test piece 3 when contact thermal resistance of the test piece 3 is varied by a contact pressure which occurs when the test piece 3 is pressed to the object, and the device comprises: multiple metal bellows 13a, 13b which extend and shrink by a pressure difference between inside and outside for pressing the test piece 3 to the object at a prescribed pressure; pressure adjustment units 15a, 15b for adjusting inner pressures of the metal bellows 13a, 13b; surface pressure sensors 17a, 17b for measuring a contact pressure; and a control unit 19 for controlling the pressure adjustment units 15a, 15b so that the contact pressure becomes the prescribed pressure on the basis of the information of the surface pressure sensors 17a, 17b.SELECTED DRAWING: Figure 1

The invention provides a dynamic response method adopting automobile intelligent windshield wiper direct current control, which comprises the following steps: generating initial curved surface feature distribution information by analyzing curved surface area friction force and key point resistance distribution, and analyzing a swing angle change rate and contact surface pressure distribution in combination with a real-time position calibration value; obtaining detailed resistance distribution data of each key point; calculating a swing force balance value and a regional resistance compensation value, and determining a forward trajectory correction value and a reverse trajectory adjustment value; a dynamic motion track parameter is generated by combining the speed optimization weight ratio, the track parameter updating rate is updated, and adjusted windshield wiper arm motion control data is obtained; the windshield wiper arm is driven to execute the dynamic track, and if the pressure distribution deviates from a preset threshold value, the swing force balance value is finely adjusted; and analyzing the action of the friction force of the curved surface region on the long-term operation stability, and judging whether the track parameter update rate meets the adaptive requirement or not by combining the region resistance compensation value to obtain a final long-term parameter adjustment range.

Provided is a pressurizing device capable of suppressing unevenness in surface pressure on a pressurized surface of an object to be acted. A pressurizing device (1) is provided with: a base body (2); and a movable body (3) that is driven to advance and retreat with respect to the base body (2) and that pressurizes the body (W) to be acted, the pressurizing device (1) having an elastic body (5) that is disposed between the distal end surface (34b) of the movable body (3) and the surface (W1) to be pressurized of the body (W) to be acted.

The application provides a combined prediction method and system for a wind resistance coefficient and a surface pressure field, and relates to the technical field of automobile aerodynamics. The combined prediction method predicts the pressure field and the wind resistance coefficient in parallel in the same network, and calibrates the wind resistance coefficient derived from the pressure field obtained by pressure field integration and the wind resistance coefficient directly regressed by the network with physical consistency constraints, so that the model has physical credibility and interpretability while ensuring numerical accuracy, thereby being capable of locating a key stress area and serving an automobile modeling iteration process.

The utility model relates to an optical MEMS pressure sensing device for measuring the surface pressure of a water tank, and the device comprises a pressure obtaining mechanism which is constructed to be of a disc structure with an inner cavity, a first plane of the pressure obtaining mechanism is provided with a pressure obtaining diaphragm, and a second plane of the pressure obtaining mechanism is provided with a second pressure obtaining diaphragm; a second plane of the pressure acquisition mechanism is provided with a filling hole communicated with an inner cavity of the disc structure, and the filling hole is arranged to be sealed and covered by a sealing cover; the pressure sensing mechanism is arranged in an inner cavity of the connecting rod connected with the pressure acquisition mechanism; the pressure transmission mechanism is arranged to be of a pipeline structure communicating with an inner cavity of the pressure obtaining mechanism and an inner cavity of the connecting rod, and the pipeline structure is arranged to be filled with pressure conduction liquid. In addition, the utility model further provides the water tank. The optical MEMS pressure sensing device provided by the embodiment of the utility model is convenient to install and arrange, good in anti-vibration effect, high in measurement accuracy, convenient to use and high in adaptability.

The application provides a high-speed train surface flow field rapid prediction method based on extremely sparse measurement data, which comprises the following steps: (1) constructing a high-precision surface pressure distribution database; (2) extracting a dominant space mode of a training set pressure distribution matrix; (3) compressive sensing reconstruction; (4) adopting an improved particle swarm optimization algorithm to obtain an optimal sensor layout scheme; and (5) establishing a rapid prediction model. The application has reasonable conception, can accurately reconstruct the surface pressure field of the high-speed train under multiple working conditions, and can rapidly and effectively predict the surface pressure distribution of the high-speed train under different working conditions through the construction of the high-precision surface pressure distribution database.

The present invention discloses a wafer in-situ abnormality monitoring system, which includes a cavity and a stage for arranging wafers. The cavity has an intake valve and a vacuum pump to form the cavity pressure inside the cavity. The vacuum pump is also connected to the stage through a pipeline to form a vacuum pumping hole area on the upper surface of the stage. The vacuum pumping hole area matches and adheres to the back surface of the wafer to form a wafer back surface pressure. When the back surface of the wafer is adsorbed during the cavity pressure increase and vacuum pumping, the change of the wafer back surface pressure is fed back to judge whether there is an abnormality in the wafer position. Through this application, it is realized to judge whether there is an abnormality in the in-situ situation of the wafer according to the pressure feedback during wafer adsorption. The structure is simple, directly matches the wafer and cooperates to ensure the accuracy of monitoring. While protecting the wafer, the production process quality and efficiency are improved.