14 results about "Liquid dynamics" patented technology

The invention discloses a method and a device for measuring a dynamic contact angle of liquid on a solid surface. The method comprises the following steps: constructing a to-be-measured system containing a first liquid phase, a fluid phase and a solid phase; immersing the to-be-detected surface of the solid phase in the environment phase upwards or downwards; an end surface object is arranged opposite to the to-be-detected surface, and the two are immersed in the same environment phase; the relative distance and position of the two are adjusted, and a longitudinal fluid bridge is formed through the liquid adding device; the camera device obtains a fluid bridge interface contour image from the side surface; horizontally moving the surface of the end surface object or the solid phase, and applying transverse lateral dragging acting force to the fluid bridge to promote the fluid bridge to deform and contact the peripheral line to move or be about to move; and recording the time sequence change of the image, analyzing and calculating to obtain the time change relationship between the contact angle value and the three-phase contact point position value, and further determining the static, forward and backward contact angles and the contact angle hysteresis value. The method is simple and accurate, has wide applicability, and can cover reliable dynamic contact angle data measurement from hydrophilic to super-hydrophobic surfaces.

The invention discloses an excrement liquid dynamic proportion regulation and control method based on sensing feedback, and particularly relates to the technical field of waste fluid control, and the method comprises the following steps: arranging a plurality of sensors in an excrement liquid conveying pipeline, collecting multi-parameter data such as flow, conductivity, solid content and the like, calculating a load fluctuation entropy value and a control conflict count value, and calculating a load fluctuation entropy value and a control conflict count value; the current control state is judged, the priority and the execution frequency of proportional integral differential control and self-adaptive control are dynamically adjusted based on the state result, a dilution ratio control signal is generated, a variable frequency pump is driven to be linked with an electric valve, clear water injection and excrement liquid mixing control are achieved, and the solid content is stabilized within the target range; according to the invention, the system state is identified through the combination of entropy and conflict counting, the priority and frequency of the control strategy are dynamically switched, and accurate adjustment under steady state and disturbance is realized; and meanwhile, a dilution ratio control signal is linked with the variable frequency pump and the electric valve, a closed-loop dilution control channel is constructed, and the intelligence and stability of solid content regulation and control are improved.

This invention proposes a high-frequency component analysis method for vortex-induced vibration signals induced by multiphase fluids, comprising: S1, determining the physical model and assumptions; S2, modeling the interaction between gas and liquid two-phase flows; S3, introducing vortex and vortex dynamics; S4, selecting a numerical solution method to solve the equations formed in S1-S3; S5, multiphysics coupling and solving, including gas-liquid dynamic coupling, thermal-fluid coupling, and interface coupling; S6, solving for vortex behavior and vortex evolution; and S7, experimental verification and result analysis. The study of unsteady gas-liquid coupled vortex models within a finite physical space involves the interaction of gas-liquid two-phase fluids and the evolution of vortices. A gas-liquid coupled vortex model is established to simulate the characteristics of vortex-induced vibration under different flow conditions. Through numerical simulation and experimental comparison, the accuracy and effectiveness of the high-frequency component analysis method are verified, and the relationship between the high-frequency components of the vortex-induced vibration signal and the multiphase fluid is verified.

The application discloses a manure liquid dynamic proportioning regulation and control method based on sensing feedback, and particularly relates to the technical field of waste fluid control, and comprises the following steps: a plurality of sensors are arranged in a manure liquid conveying pipeline, multi-parameter data such as flow, conductivity and solid content rate are collected, load fluctuation entropy values and control conflict count values are calculated, a current control state is determined, and the priority and execution frequency of proportional integral derivative control and adaptive control are dynamically adjusted based on the state result, a dilution ratio control signal is generated, a variable frequency pump and an electric valve are driven in linkage, clean water injection and manure liquid mixing control are realized, and the solid content rate is stabilized in a target range; the application realizes accurate regulation under steady state and disturbance by jointly identifying the system state through the entropy value and the conflict count and dynamically switching the control strategy priority and frequency; meanwhile, the dilution ratio control signal is linked with the variable frequency pump and the electric valve, a closed-loop dilution control path is constructed, and the intelligence and stability of the solid content rate regulation and control are improved.

The invention discloses a method, device and equipment for determining a dyne value of a substrate surface and a storage medium, and relates to the technical field of computers. The method comprises the following steps: acquiring a plurality of frames of test images recording the dynamic wetting process of test liquid on the surface of a base material; determining the shrinkage speed of the test liquid on the surface of the base material according to the multiple frames of test images; and determining a target dyne value of the surface of the base material according to the shrinkage speed. According to the technical scheme, the dynamic change of the wetting process is recorded and quantitatively analyzed through multiple frames of images, the corresponding relation between the shrinkage speed and the dyne value based on image calculation is more accurate, the random error of manual visual judgment is remarkably reduced, and the test result has good repeatability and comparability.

1. Name of this design product: Car Steering Wheel Patch (Liquid Dynamics - BMW 5 Series). 2. Application of this design product: Patches for automobile steering wheels. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

The invention discloses a high-precision reconstruction method for a dynamic liquid level of a trace liquid. The method comprises the following steps: synchronously acquiring a binocular image sequence of the dynamic liquid level of the trace liquid to be measured; based on the binocular image sequence, obtaining an initial three-dimensional point cloud of the dynamic liquid level through stereoscopic vision three-dimensional reconstruction; constructing a fluid mechanics constraint model of the micro-liquid based on the action of surface tension and gravity; performing iterative optimization processing on the initial three-dimensional point cloud by taking a fluid mechanics constraint model as a constraint condition to obtain an optimized dynamic liquid level three-dimensional model; based on the optimized dynamic liquid level three-dimensional model, the liquid level height and the volume capacity of the micro liquid are calculated. According to the method, visual three-dimensional reconstruction and fluid mechanics constraints are fused, the liquid level form better conforms to the physical reality through iterative optimization, the measurement precision, response speed and anti-jamming capability of the micro-liquid in the dynamic process are remarkably improved, and the method is suitable for the precise metering requirements of the fields of biomedicine, chemical analysis and the like for micro-upgrading liquid.

The invention provides a dual-path battery health state estimation method based on an electrical coupling model, which comprises the following steps: step 1, establishing an electrical coupling model of a battery, the electrical coupling model comprising a gas-liquid dynamic model and an equivalent circuit model; 2, performing parameter identification on the gas-liquid dynamic model and the equivalent circuit model respectively; 3, constructing a joint estimation state equation based on the key parameters obtained through identification, and carrying out fusion estimation on the battery state; and 4, providing a battery health state estimation method based on the gas-liquid coupling model. According to the method, through dual prediction of the gas-liquid dynamic model and the equivalent circuit model, high-precision parameters of the gas-liquid dynamic model and structural simplicity and convenience of the equivalent circuit are considered, and accuracy and robustness of a prediction result are ensured; meanwhile, the parameter identification of the gas-liquid dynamic model is convenient, the parameter is used as the aging characteristic of the battery, the physical significance of the model is reflected, and errors generated by model prediction iteration can be avoided.

The invention relates to a carbon dioxide oil displacement full-flow rheological property test system and method, and the system comprises a carbon dioxide oil displacement fluid circulation system which is used for the circulation flow of fluid; the liquid dynamic rheological testing unit is used for receiving a fluid medium which is in a liquid state and does not reach a steady state in the oil displacement process; the liquid steady-state rheological testing unit is used for receiving a fluid medium which is in a liquid state and reaches a steady state in the oil displacement process; the supercritical dynamic rheological testing unit is used for receiving a fluid medium which is in a supercritical phase state and does not reach a steady state in the oil displacement process; the supercritical steady-state rheological testing unit is used for receiving a fluid medium which is in a supercritical phase state and reaches a steady state in the oil displacement process; the gaseous dynamic rheological testing unit is used for receiving a fluid medium which is in a gaseous phase state and does not reach a steady state in the oil displacement process; the gaseous steady-state rheological testing unit is used for receiving a fluid medium which is in a gaseous phase state and reaches a steady state in the oil displacement process, and the device and the method can be widely applied to the technical field of rheological property testing.

The utility model discloses a hydraulic positioner which comprises a base, and an overturning adjusting module is installed on the base. The overturning adjusting module comprises a first air cylinder installed at the bottom of the base, the movable end of the first air cylinder is connected with a rotation angle adjusting module, and the rotation angle adjusting module is rotationally connected with the two sides of the upper portion of the base respectively. A pneumatic chuck is mounted on the rotation angle adjusting module; according to the utility model, the hydraulic driving system is adopted to adjust the turning displacement of the positioner, so that the stability of the positioner in long-time operation is improved, the operation precision is higher, the hydraulic driving system is suitable for heavy workpieces with higher load, the abrasion of parts of the positioner can be reduced when the positioner bears larger load, and the working efficiency is improved. And the service life of the positioner is prolonged, and the maintenance cost is reduced.

The invention relates to the technical field of hydrometallurgy production systems, in particular to a solvent regeneration control method for separating zirconium and hafnium through MIBK method centrifugal extraction, which comprises the following steps: S1, data acquisition: acquiring real-time temperature data of a mixed phase in a control system and temperature, pressure and flow data of cooling liquid; all data are transmitted to the controller; s2, parameter comparison: comparing the received real-time temperature of the mixed phase with a preset target temperature of the mixed phase by the controller, and analyzing the relative size of the real-time temperature of the mixed phase and the target temperature of the mixed phase; and S3, dynamic regulation and control of the cooling liquid: based on an analysis result of the step S2, the controller adjusts the opening degree of a cooling liquid flow adjusting unit through a heat exchange module, controls the flow of the cooling liquid and adjusts the heat exchange rate of the mixed phase in the neutralization reactor, so that the temperature of the mixed phase quickly responds and is maintained in a preset range. According to the control method, neutralization reaction heat in the solvent regeneration system can be removed in time, and the solvent regeneration efficiency and quality are improved.

The invention discloses an inertia friction welding machine axial whole process closed type liquid dynamic and static pressure bearing main shaft system, a rotating side main shaft is arranged in a main shaft box, and a rolling ball bearing is arranged between one end of the rotating side main shaft and the wall of a bearing box; a speed reducer transmission gear is arranged on the rotating side main shaft on the adjacent side of the bearing; on the adjacent side of the gear, a double-row cylindrical roller bearing is arranged between the rotating side main shaft and the wall of the supporting box; a bearing side liquid dynamic and static pressure thrust bearing base is arranged on the rotating side main shaft on the adjacent side of the bearing; a bearing side liquid dynamic and static pressure thrust bearing is arranged on the rotating side main shaft on the adjacent side of the base; an inertia energy storage disc is arranged at the other end of the rotating side main shaft, and a double-row angular contact ball bearing is arranged between the rotating side main shaft and the wall of the supporting box on the adjacent side of the energy storage disc; a non-bearing side liquid dynamic and static pressure thrust bearing base is arranged on the rotating side main shaft on the adjacent side of the bearing; a non-bearing side liquid dynamic and static pressure thrust bearing is arranged on the rotating side main shaft on the adjacent side of the base. According to the invention, the axial bearing is guaranteed, and the welding processing efficiency is improved.

This invention relates to a closed-loop axial hydrostatic / hydrostatic bearing spindle system for an inertial friction welding machine. The invention aims to address the problem that in inertial friction welding machines, the system cannot adaptively adjust the oil film thickness of the hydrostatic / hydrostatic thrust bearing according to the magnitude of the axial upsetting force from start to finish, thus failing to form a fully closed-loop system. The spindle system is equipped with opposing double-sided hydrostatic / hydrostatic thrust bearings. One side is a load-bearing hydrostatic / hydrostatic thrust bearing (11), and the other side is a non-load-bearing hydrostatic / hydrostatic thrust bearing (12). The non-load-bearing hydrostatic / hydrostatic bearing (12) acts as a back pressure, improving the oil film stability and stiffness of the load-bearing hydrostatic / hydrostatic thrust bearing (11), increasing welding accuracy, facilitating control of axial shortening, and improving welding stability and efficiency. The specific structure is shown in Figure 1.

The invention provides a sodium ion battery SOC accurate estimation method based on an improved gas-liquid dynamic model and a battery management system, and the method comprises the following steps: building a gas-liquid dynamic model used for describing the charge-discharge and polarization process of a battery, the gas-liquid dynamic model constructs a gas total solubility equation in the process of dissolving gas in liquid by simultaneously considering gas gap filling solubility and gas hydration solubility; and estimating the state of charge (SOC) of the battery based on the gas-liquid dynamic model and the input and output data of the battery. A traditional gas-liquid dynamic model only simulates the polarization effect of a battery through gas gap filling solubility, voltage rebound characteristics strongly related to the polarization reaction are difficult to completely describe, and large errors exist in the model. Therefore, the gas hydration solubility is introduced during modeling, and the gas-liquid dynamic model is improved, so that the polarization dynamic behavior of the sodium ion battery is represented more accurately, and the SOC estimation precision is improved.