7 results about "Particle chains" patented technology

The present application relates to the technical field of mechanical equipment fault diagnosis, and particularly relates to a kind of based on online ferrography's abrasive particle group feature extraction method, it is characterized by: including the following steps: obtaining segmented online abrasive particle image;Abrasive particle group feature extraction;Abrasive particle group feature representation;Abrasive particle group feature selection.The present application extracts the abrasive particle number, maximum abrasive particle chain length, maximum abrasive particle chain width, abrasive particle chain width mean value, abrasive particle chain length mean value, abrasive particle area mean value feature parameters based on pixel significance, calculates fractal dimension and abrasive particle coverage area index, the abrasive particle features extracted are characterized and verified by typical online abrasive particle image, eight kinds of characteristic time series under the whole life wear are constructed, the abrasive particle number distribution of different area levels under time series is proposed, and finally abrasive particle coverage area index, abrasive particle number, maximum abrasive particle chain width are selected as the representation parameters of abrasive particle group, which provides important reference index for next step of wear state recognition and prediction.

The application discloses a kind of magnetorheological fluid power transmission damage test method and system, and it is related to magnetorheological fluid test technical field.System includes transmission unit, observation unit and measurement and control unit, transmission unit includes servo motor, torque sensor, magnetorheological fluid driver and load, magnetorheological fluid driver is equipped with replaceable active disc, driven disc, excitation coil, transparent observation window and anti-centrifugal dispersion type magnetorheological fluid;Observation unit includes optical high-speed microscope, for collecting particle chain distribution evolution image and wall wear image;Measurement and control unit are used for synchronous acquisition rotation speed, torque and magnetic field intensity and control excitation current.The application can establish corresponding relationship with the wall wear characteristics obtained after experiment pause by macroscopic power parameter, particle chain microcosmic evolution parameter, can quantitatively analyze the influence of different wall surface parameters on transmission damage, provides basis for magnetorheological fluid transmission device structure optimization and life evaluation.

The utility model discloses an automatic particle chain filling device for sequentially scheduling particles and spacing rods to enter a particle chain sleeve. A feeding part comprises a particle feeding mechanism and a spacing rod feeding mechanism; particles and spacing rods are sequentially placed in a particle chain sleeve through a dispatching mechanism, a first push rod driving mechanism pushes the particles or the spacing rods to move forwards along the particle chain sleeve one by one to a needed position for filling through a push rod, and the dispatching mechanism conducts dispatching in the mode that a grabbing mechanism and a second moving platform are combined. And the particles or the spacing rods are transported in a pipeline transportation mode. According to the particle chain filling device, automatic filling can be achieved, the radiation time and labor capacity of operators are greatly reduced, the filling efficiency is improved, the filling accuracy is guaranteed, and meanwhile the device is simple in structure and convenient to operate and maintain.

According to the multi-layer aluminum foil ultrasonic welding method and device based on particle doping and intelligent control, high-conductivity metal particles are introduced between adjacent aluminum foil layers, local plastic flow and metallurgy neck connection are promoted under the ultrasonic vibration effect, a particle chain bridge structure and a multi-point conductive channel are formed, the interface contact resistance is effectively reduced, and the service life of the multi-layer aluminum foil is prolonged. The current-carrying capability is improved; and meanwhile, real-time monitoring and feedback control of multiple parameters such as temperature and power in the welding process are combined, technological parameters are optimized, a subsequent welding strategy is corrected, and the welding spot combination uniformity and stability are remarkably improved. The method effectively solves the technical problems of high contact resistance and poor conductivity caused by insufficient interface bonding in traditional multilayer aluminum foil ultrasonic welding, and realizes high-strength and low-resistance reliable connection under the condition of limited welding spot size.

This invention discloses an adaptive collision energy absorption system based on smart materials. By integrating magnetorheological smart materials, multi-sensor fusion, electromagnetic field control, and a hierarchical energy absorption structure, it achieves real-time adaptive absorption and reversible deformation of collision energy. The system consists of a smart material energy absorption module, a sensor module, a control module, an energy management module, and a mechanical structure module. The smart material undergoes a phase transition under the influence of an electromagnetic field, achieving efficient energy absorption through friction of the particle chains, magnetic moment redirection, and chain recombination. After a low-speed collision, it can automatically recover by removing the magnetic field, and during high-speed collisions, it works in conjunction with a traditional energy absorption box. This invention also discloses a vehicle.

The utility model discloses an automatic particle chain filling device based on a bifurcated pipe. A feeding part comprises a particle feeding mechanism and a spacing rod feeding mechanism; the particles and / or the spacing rods are filled into the particle chain sleeves one by one in a pipeline transportation mode, the pipeline transportation mode is characterized in that the bifurcated pipes are connected with the particle chain sleeves, and the particle feeding mechanism and the spacing rod feeding mechanism are connected with the bifurcated pipes respectively, so that the particles and the spacing rods are filled one by one; and the first push rod is driven by the first push rod driving mechanism to push the particles or the spacing rods into the particle chain sleeve one by one along the conveying channel, and the particles or the spacing rods move forwards along the particle chain sleeve to a required position for automatic filling. The radiation time and labor capacity of operators are greatly reduced, the filling efficiency is improved, the filling accuracy is ensured, and meanwhile, the equipment is simple in structure and convenient to operate and maintain.

This invention discloses a one-dimensional particle chain buffer that prolongs the impact time, belonging to the field of smart materials design. The invention consists of a composite particle chain composed of three uniform particle chains, all with identical particle material parameters except for yield strength. The delay in impact time can be adjusted by changing the yield strength of the middle particle material; that is, as the yield strength of the middle particle material decreases, the shock wave propagation speed in the particle chain gradually decreases, thereby prolonging the impact time at the output end. This invention provides a novel technical approach for structural protection under low-speed and high-speed impact conditions. By placing this invention between the impact loading end and the impacted structure, the impact resistance of the structure is enhanced by prolonging the impact response time of the impacted structure.