13 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 utility model relates to a particle chain exposure film model device, which structurally comprises a first die body, a second die body, a particle positioning hose, a support tube and a radiation dose measurement film, the first die body and the second die body are mutually hinged, the first die body and the second die body can be folded around a hinge shaft, a plurality of first channels are arranged on the first die body, and a plurality of second channels are arranged on the second die body. A plurality of first channels are formed in the first die body, a plurality of second channels are formed in the second die body, the outer diameter of the particle positioning hose is consistent with the inner diameter of the supporting tube, the outer diameter of the supporting tube is consistent with the diameter of the first channels / second channels, and the radiation dose measuring film is placed on the involution surface of the first die body and the second die body. According to the utility model, particle chains with different lengths and different arrangements can be arranged according to needs, the particle chains are made into different shapes, different combinations of single chains or multiple chains are adopted, the distance between the particle chains and the radiation dose measurement film is controlled, and the actual radial dose distribution of the particle chains is measured. And particle chain dose distribution is verified for clinical treatment and the like.

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 present invention relates to the technical field of magnetorheological intelligent materials, and particularly relates to a magnetorheological elastomer with a reticular particle chain structure and a preparation method thereof. It is formed by splicing multiple magnetoelastic units with the same structure. Each of the magnetoelastic units includes an elastic matrix and multiple magnetic chains fixed in the elastic matrix in a reticular form. The cross-section of the elastic matrix of each magnetoelastic unit is square, and multiple concentric square magnetic chain loops are arranged in increasing order from the center of the square. The deflection angle between the magnetic chain loops and the elastic matrix is 15°-75°. For the magnetorheological elastomer with a reticular particle chain structure of the present invention, since the magnetic chains in the elastic matrix have a certain inclination angle, and there is a certain angle between the combined magnetic chain loops and the elastic matrix, its mechanical properties and magnetorheological effect can be further improved.

The invention relates to the technical field of mechanical equipment fault diagnosis, in particular to an abrasive particle group feature extraction method based on an on-line ferrography, which is characterized by comprising the following steps of: acquiring a segmented on-line abrasive particle image; extracting abrasive particle group features; characterizing abrasive particle group characteristics; and selecting abrasive particle group characteristics. According to the method, the characteristic parameters of the abrasive particle number, the maximum abrasive particle chain length, the maximum abrasive particle chain width, the abrasive particle chain width mean value, the abrasive particle chain length mean value and the abrasive particle area mean value based on the pixel meaning are extracted, the fractal dimension and the abrasive particle coverage area index are calculated, and the extracted abrasive particle characteristics are represented and verified through a typical online abrasive particle image; according to the method, eight characteristic time sequences under full-life wear are constructed, the number distribution of the abrasive particles at different area levels under the time sequences is provided, and finally, the abrasive particle coverage area index, the abrasive particle number and the maximum abrasive particle chain width are selected as characterization parameters of the abrasive particle group, so that important reference indexes are provided for next wear state recognition and prediction.

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.

The application claims a ferrography image abrasive particle chain growth process segmentation method, and relates to the technical field of ferrography image segmentation, and comprises the following steps: S1, inputting a training picture, and training an abrasive particle target detection model; S2, inputting a predicted ferrography image, and acquiring object position information and category information in a predicted picture; S3, adopting an improved marker watershed segmentation algorithm to perform image segmentation on the ferrography image, and segmenting the abrasive particle chain adhered together into single abrasive particles. The method can accurately segment the abrasive particles in the abrasive particle chain one by one, and the abrasive particle chain marked with the abrasive particle and the background is segmented by using the marker watershed algorithm, so that the abrasive particle chain is accurately segmented, and the over-segmentation and under-segmentation problems in the abrasive particle chain segmentation are solved.

The invention discloses an automatic particle chain filling device based on push rod pushing. A first push rod driving mechanism drives a push rod to push particles or spacing rods to move forwards one by one along a particle chain sleeve to a required position for automatic filling; the first push rod driving mechanism adopts a friction driving mechanism, the friction driving mechanism comprises a friction assembly, at least one part of the surface of the friction assembly is tightly attached to the surface of the push rod, and the push rod is driven to move front and back through friction force generated by attachment; or the first push rod driving mechanism drives the push rod to move back and forth in a mode of combining the clamping device and the reciprocating motion module, the clamping device can clamp or release the push rod, and the reciprocating motion module can drive the clamping device to reciprocate along a preset track. 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 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 application relates to a quantum teaching machine and an optical imaging system for a quantum teaching machine. The quantum teaching machine is used to implement particle trapping and display the states of the trapped particles, and the optical imaging system is used to acquire image information of the trapped particles for display on the screen of the quantum teaching machine; the optical imaging system includes: a laser light source, a diaphragm, and an imaging device; wherein, the laser light source and the imaging device are arranged around the quadrupole device, the lens of the imaging device and the laser light source are both oriented towards the region where the ion trap is located, wherein, the laser light source is located on one side of the vertical plane of the light source main axis, the imaging device and the laser light source are on the same side of the vertical plane or are respectively on both sides of the vertical plane, and when the imaging device and the laser light source are respectively on both sides of the vertical plane, the imaging device is outside the range of the maximum opening angle of the line laser. The optical imaging system provided by this application is more ingenious and reasonable in optical path design, and has a better illumination effect on the particle chain trapped in the ion trap.

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.