22 results about "Elastic collision" patented technology

The invention discloses a noise reduction ratchet wheel and pawl structure which is composed of a noise reduction spring and a pawl body, the noise reduction spring is arranged on the surface of one side of the pawl body, and the noise reduction spring and the pawl body are of an integrated structure. The silencing spring on the pawl body is firstly in spring collision with gear teeth of the ratchet wheel body; when the pawl body continues to rotate, a gap between the pawl body and the noise reduction spring is eliminated, the pawl body elastically collides with the noise reduction spring, and therefore noise generated by collision is reduced.

The low-energy PVD coating device comprises a sputtering cathode, the sputtering cathode is loaded with a target material, the target material and a substrate are oppositely arranged, and the target material generates film material particles under the action of an electric field of the sputtering cathode; the energy adjusting plate is positioned between the substrate and the sputtering cathode and is provided with a via hole; the collision particle pipeline is connected with the collision particle source, the collision particle source is internally provided with preset inert gas, a gas outlet end opening of the collision particle pipeline is formed in the energy adjusting plate, and the conveyed inert gas moves towards the target material; the kinetic energy of the inert gas is smaller than that of the film material particles. As the inert gas has a relatively fixed flowing direction and is opposite to the incident direction of the film material particles, the energy of the film material particles is reduced from a high-energy state to a state close to the energy state of the just emitted gas particles through energy exchange of elastic collision, so that the film material particles with very low energy are obtained, and stable low-energy deposition coating is realized.

The invention relates to an anti-gravity technology principle and a device, which are the vector sum of the resultant force of the axial torsion borne by a conjugate main shaft or an auxiliary shaft and the counter-acting force of the resultant force required by the conjugate suspension rotor for alternately carrying out fixed-shaft eccentric rotary motion and composite planar motion, wherein the counter-acting force is the axial torsion borne by the conjugate main shaft or the auxiliary shaft. The conjugated suspension rotor obtains the pre-collision impulse and the rebound space through sinking acceleration and spin acceleration, and in the non-elastic collision process under forced constraint of each other, energy exchange occurs between mass centers of the suspension rotor. And the pre-collision vertical impulse of the full mass center of the suspension rotor pointing below the horizontal line is changed into the rebound vertical impulse pointing above the horizontal line. Conjugated suspension rotors are reversely hung on respective driving double shafts by means of centrifugal force, are surrounded by the auxiliary shafts and the driving arms of the auxiliary shafts and rotate according to conjugate dynamic laws. The antigravity acts on a conjugate origin, is output along a conjugate axis and points to a collision point, and is derived from centrifugal force generated by eccentric rotation of a fixed shaft of the suspension rotor, counter-acting force in acceleration and deceleration processes, rebound impulse obtained by collision and counter-acting force of power torque borne by a main shaft or an auxiliary shaft.

The utility model discloses an underground intelligent ventilation device for a coal mine, which belongs to the technical field of ventilation devices and comprises a pipeline and an air duct, the air duct is fixedly mounted on the pipeline, an induced draft fan is fixedly mounted in the air duct, a filtering and purifying mechanism is arranged in the pipeline, an elastic collision mechanism is arranged on the filtering and purifying mechanism, and the elastic collision mechanism is fixedly mounted on the pipeline. The filtering and purifying mechanism comprises a fixing ring and a driving shaft, when the filtering nets in the pipeline need to be cleaned, a worker can rotate the driving shaft outside the pipeline to enable the rotating shaft in the pipeline to rotate, the cleaning plate is driven through the rotating shaft, a brush on the cleaning plate is made to brush dust on the first filtering net, and the cleaning effect is good. Falling dust can be cleaned out by opening the bottom plate, dust removal and cleaning can be conveniently and rapidly conducted on a filter screen in the ventilation equipment, the ventilation quality is improved, and the phenomenon of bacterium breeding caused by dust accumulation is avoided.

The invention discloses a shock absorber for a pipeline and a pipeline system, and relates to the technical field of vibration control. According to the shock absorber for the pipeline, the multiple sets of local resonance units are arranged in the annular shell, each local resonance unit comprises the hollow mass block filled with the damping energy dissipation particles, the first elastic piece and the second elastic piece, and a cooperative mechanism of local resonance band gap directional energy absorption and particle inelastic collision broadband energy dissipation is achieved; on the basis of synergistic interaction of local resonance and particle dynamics characteristics, efficient vibration reduction can be conducted on a wide frequency band, vibration of a pipeline system on various occasions is effectively restrained, and the problems that in the prior art, low-frequency performance is poor, the frequency band is narrow, robustness is not high, and parameter adjustment is complex are solved. The whole shock absorber adopts a compact hoop type integrated design, is flexible and simple, can adapt to different pipe diameters, and breaks through the problems of large size, complex installation and insufficient reliability in the prior art. The pipeline system comprises the shock absorber for the pipeline.

The utility model discloses a sweeper which comprises a shell, a buffer structure and a sweeping piece, and the shell is provided with a first station and a second station; the buffer structure comprises a mounting part and an elastic part, the mounting part is rotationally connected to the shell, the mounting part can selectively rotate to the first station or the second station, the elastic part elastically abuts against the shell and the mounting part, and the elastic part is used for pushing the mounting part to rotate to the first station; the sweeping part is rotationally connected to the mounting part, and when the mounting part rotates between the first station and the second station, the sweeping part is used for sweeping the ground. Compared with the prior art, the cleaning device has the advantages that the mounting part and the elastic part are arranged, the cleaning part is arranged on the mounting part, meanwhile, the mounting part is elastically connected with the shell through the elastic part, and when the cleaning part collides with an obstacle, rigid collision is converted into elastic collision through the elastic effect of the elastic part; therefore, the cleaning piece and the shell are prevented from being collided and damaged, and abnormal sound of the shell caused by external force transmitted into the shell is avoided.

A method for calculating stress exerted on a power transmission line by dust particles during a sandstorm, comprising the following steps: S1: obtaining a probability alpha of collision between dust particles and the power transmission line during a sandstorm based on a volume occupied by the power transmission line in space; S2: simulating a process of collision between a single dust particle and the power transmission line during a sandstorm based on an elastic collision model and a particle motion equation; S3: obtaining an acting force exerted on the power transmission line by the single dust particle from the simulation of the collision between the single dust particle and the power transmission line; and S4: obtaining a stress exerted on the power transmission line by the dust particles based on the acting force exerted on the power transmission line by the single dust particle, a dust particle mass concentration c, and the probability alpha of collision between the dust particles and the power transmission line.

The present invention discloses a UAV formation anti-collision method based on a three-dimensional velocity obstacle model and an improved artificial potential field method, including: improving the artificial potential field based on the communication topology and communication weight; calculating the collision avoidance velocity field between UAVs based on the improved first artificial potential field; constructing an elastic collision avoidance distance for the UAVs, and introducing the relative motion velocity vector to improve the artificial potential field under the elastic collision avoidance distance; calculating the collision avoidance velocity field of the UAVs based on the improved second artificial potential field; obtaining the total velocity field of the UAVs based on the collision avoidance velocity field and the collision avoidance velocity field; converting the UAV anti-collision instructions for the total velocity field to obtain velocity instructions, pitch angle instructions, and yaw angle instructions; and tracking the above instructions to achieve inter-aircraft anti-collision and obstacle avoidance. The inter-aircraft collision avoidance of the present invention takes into account the communication topology and collision avoidance priority, can dynamically adjust the collision avoidance distance and potential field value, avoid ineffective collision avoidance maneuvers, and has a higher overall efficiency.

The present invention discloses a method for calculating the characteristic time of gas vibration relaxation by using the "state-to-state" transition rate, which includes the following processes: setting the molecular vibration energy at energy level i as ev(i); when an inelastic collision occurs from i to j once, the molecular vibration energy will increase by ev(j) - ev(i); calculating the change in the gas vibration energy Ev by using the "state-to-state" transition rate between any two vibration energy levels i and j, combining with formula (1), and the gas state equation p = nkBT (kB is the Boltzmann constant), to obtain a method for calculating the vibration relaxation characteristic time from the "state-to-state" transition rate. The present invention adopts a new method to calculate the vibration relaxation time τ v , which can give the vibration relaxation time τ v when the translational temperature T and the vibration temperature T v are not equal; the calculation range of the calculated vibration relaxation time τ v is relatively large, and can cover the high temperature region above 10,000 K; only some basic physical and chemical data are needed to calculate the vibration relaxation time τ v , without the need to conduct a wind tunnel experiment, which greatly reduces the cost.

The application discloses a self-tracking long-distance neutron source detection device and method, which can quickly obtain the accurate distance of a neutron source, and further reconstruct the three-dimensional space distribution of the neutron source, and improve the searching efficiency. The device comprises a detector double-sided array, a first detector array is used to determine the first collision point coordinates and the first energy value of each neutron incident to the detector, and a second detector array is used to determine the corresponding second collision point coordinates; a data processing system is used to determine the elastic collision angle, and according to the first collision point coordinates, the second collision point coordinates and the elastic collision angle of each neutron, the projection image of the neutron source on a specified plane is reconstructed, and the azimuthal coordinate of the neutron source is obtained; and a motion control system and an array automatic adjustment mechanism are used to control the detector double-sided array to perform horizontal rotation and pitch adjustment according to the azimuthal coordinate of the neutron source, and adjust the arrangement parameters of the detectors in the detector double-sided array, so that the reconstructed image of the neutron source is obtained.

The invention discloses a self-tracking long-distance neutron source detection device and method, and the device and method can quickly obtain the accurate distance of a neutron source, reconstruct the three-dimensional space distribution of the neutron source, and improve the searching efficiency. The device comprises a detector double-sided array, wherein the detector double-sided array adopts a first detector array to determine a first collision point coordinate and a first energy value of each neutron incident to a detector, and adopts a second detector array to determine a second collision point coordinate of the corresponding neutron; the data processing system determines an elastic collision angle, reconstructs a projection image of the neutron source on a specified plane according to the first collision point coordinate, the second collision point coordinate and the elastic collision angle corresponding to each neutron, and obtains an azimuth coordinate of the neutron source; and the motion control system and the array automatic adjustment mechanism control the detector double-sided array to perform horizontal rotation and pitching adjustment according to the azimuth coordinates of the neutron source, and adjust the arrangement parameters of the detectors in the detector double-sided array to obtain a reconstructed image of the neutron source.

The application discloses a large-scale crowd motion saliency detection method based on elastic collision and vector standard deviation. In the application, each vector in a crowd vector field is regarded as an elastic collision particle, and a collision force between the particles is obtained through an elastic collision theory in physics, and a crowd saliency feature is constructed with the aid of a crowd vector standard deviation. Firstly, a crowd vector field is extracted through an optical flow method, then the vector is regarded as an elastic collision particle, whether the particles can collide with each other is judged, and a collision force between the particles is obtained as a saliency feature through the aid of the elastic collision theory, the saliency feature map is optimized through the crowd vector standard deviation, and finally a crowd saliency region is detected through threshold segmentation.

This invention discloses a UAV relay trajectory planning method based on hybrid optoelectronic switching, comprising: establishing a free-space optical channel model, focusing on turbulence-induced scintillation and weather-induced attenuation; fusing line-of-sight and non-line-of-sight large-scale fading when constructing the radio frequency channel model, and quantifying downlink multi-user interference; establishing a hybrid obstacle model based on the Ray-AABB algorithm, fusing static ground obstacles and dynamic aerial obstacles, and determining the feasible location set for line-of-sight connections; using a boundary reflection random walk model to describe user movement, defining a dual-parameter update mechanism for velocity and direction and a boundary elastic collision rule; dynamically optimizing user throughput by combining fractional-order power allocation and non-orthogonal multiple access technology; and proposing a deep reinforcement learning framework, using dual deep Q-networks to jointly optimize 3D trajectories, optoelectronic switching, and resource allocation. This invention can effectively address the challenges of low-altitude spectrum denial environments, ensuring the robustness and adaptability of the system.

The invention relates to the technical field of glass detection, and particularly discloses glass edge impact resistance detection equipment and method.The glass edge impact resistance detection equipment comprises a mounting frame, a plastic damping pipe, an adjusting assembly and an analysis mechanism, the plastic damping pipe is provided with a piston disc, an impact block is arranged on the piston disc, and a first electric telescopic rod is vertically arranged on the mounting frame; a first negative pressure head is arranged at the telescopic end of the first electric telescopic rod, a second negative pressure head is fixedly arranged on the mounting frame, and the adjusting assembly can achieve inelastic collision when the impact block collides with the edge of the glass, in the deformation process of the edge of the glass and in the deformation and rebounding process of the edge of the glass; and then damping borne by the impact block is adjusted, so that inelastic collision on the glass edge under different working conditions such as hail and flying stones is simulated, the collision time is prolonged to an observable range, and a defect sensitive area is conveniently positioned. And the analysis mechanism can also carry out danger analysis on chippings generated by collision to judge whether stress distribution unbalance exists on the edge of the glass or not.

The invention discloses a fluid-structure interaction dynamics simulation analysis method of a nuclear reactor control rod drive line under a multi-point excitation load. The method comprises the following steps: firstly, obtaining a fluid resistance rule in a control rod falling process in advance through fluid simulation and fitting a quantitative relation; secondly, simulating incomplete elastic collision and friction between the control rod and the guide structure by adopting a contact model based on a lubrication theory; and finally, on the basis of commercial finite element software, in each step of transient dynamic analysis, calculating and applying corresponding fluid force according to the real-time motion state of the control rod to realize fluid-structure interaction simulation, and supporting an explicit time integration algorithm and an implicit time integration algorithm. According to the method, the rod dropping process can be completely and accurately simulated, the simulation process is standardized, the use complexity is reduced, and an efficient and reliable virtual experiment means is provided for safety design and performance optimization of the control rod drive wire.

The invention discloses a gravel pile composite foundation dynamic penetration hammer count correction method and application, and the method comprises the steps: carrying out the statistics of the hammer count per 10cm obtained by each dynamic penetration according to 1m, and obtaining a preliminary statistical hammer count curve; a median method is adopted, statistics is carried out by taking a plurality of root piles as a statistical group, the median is obtained, and the median is taken as the representative value of the dynamic sounding hammering number of the detection area; deriving a rod length correction coefficient based on a Newton elastic collision theory and a Hailey piling formula; the method is applied to a scene when the depth of the gravel pile exceeds 20 meters. According to the method, aiming at the ultra-deep gravel pile (the depth exceeds 20 meters), a correction method for the depth exceeding 20 meters is not provided in the existing Geotechnical Engineering Reconnaissance Specification (GB50021-2001) 2009 edition; according to the method, the discreteness is reduced by adopting a median method aiming at the problem that the discreteness of a single-pile test result is large, so that the subsequent foundation reinforcement effect evaluation is difficult.

The present application relates to a kind of based on extrusion adhesion and elastic collision difference camellia fruit pulp seed separation method, separation method includes determining the interval D1 of first level cloth conveyor belt and corresponding press roller, the interval D2 of second level cloth conveyor belt and corresponding press roller, the interval D3 of third level cloth conveyor belt and corresponding press roller and the height H' and angle θ' of elastic collision plate;Separation device includes rack, adhesion separation device and elastic collision separation device, rack top is provided with adhesion separation device, rack is provided with the elastic collision separation device at the bottom of adhesion separation device output end;The present application is calculated by sampling detection and obtains the size of D1, D2 and D3 of different varieties of camellia fruit and the height H' and angle θ' of elastic collision plate, according to different varieties of camellia fruit data adhesion separation device and elastic collision separation device are adjusted, can effectively separate the pulp seed mixture material of all varieties of camellia fruit.

The invention discloses a multi-stage energy consumption type collision buffering device for transverse limiting of a railway bridge girder, and belongs to the technical field of bridge seismic resistance. The multi-stage energy consumption type collision buffering device comprises a steel corbel fixed to the inner side wall of a support padstone through a steel corbel transverse bolt; the collision block is fixed at the bottom of the main beam; the collision buffering structure is mounted at the top of the steel corbel, and the collision buffering structure has the characteristic of multi-stage energy consumption; when the main beam moves in the transverse bridge direction, the collision block collides with the collision buffering structure, the collision buffering structure converts rigid collision into elastic collision through multi-stage energy consumption, displacement of the main beam in the transverse bridge direction is effectively limited, and meanwhile the collision block is prevented from being damaged or falling off. Multi-stage energy consumption and main beam limiting can be achieved through the collision buffering structure during collision, the collision buffering structure collides with the collision block, displacement of the main beam can be limited, the support is prevented from being damaged, and meanwhile the support is protected from being damaged due to the fact that shear strain is too large.

The present invention relates to a method for calculating the dynamic penetration resistance of dynamic penetration testing in the field of geotechnical engineering in-situ testing, which takes into account multiple collisions. The method comprises: calculating the initial value of the acceleration of the soil body on the probe rod, calculating the drop hammer speed, the probe rod speed, and the probe rod kinetic energy increment after the ith collision, until the speed of the drop hammer after the collision is equal to the speed of the probe rod or the speed of the drop hammer is equal to 0, and then stopping the calculation; taking the sum of the probe rod kinetic energy increment after each collision and the sum of the kinetic energy of the drop hammer at the end as the effective hammer energy of dynamic penetration testing, using the effective hammer energy of dynamic penetration testing to correct the acceleration of the soil body on the probe rod, using the iteration method to correct the effective hammer energy of dynamic penetration testing, and calculating the dynamic penetration resistance. Compared with the existing dynamic penetration resistance calculation method, the present invention takes into account the characteristics of non-completely elastic collisions between the drop hammer and the probe rod, multiple collisions between the drop hammer and the probe rod, and the resistance of the soil body to the probe rod, and can provide guidance for dynamic penetration testing.

The application discloses a honeycomb damping structure embedded with period collision energy traps, which comprises a honeycomb sandwich structure body and period collision energy traps embedded in a honeycomb core layer of the honeycomb sandwich structure body; the honeycomb core layer, together with an upper panel of an upper surface and a lower panel of a lower surface, forms the honeycomb sandwich structure body; the period collision energy traps are formed by collision energy trap functional micro-units arranged according to a predetermined period rule; the collision energy trap functional micro-units are formed by mass blocks filled in honeycomb cavities of the honeycomb core layer; gaps exist between the mass blocks and the honeycomb cavities, the mass blocks can freely move in the honeycomb cavities and realize transmission and absorption of vibration energy through non-elastic collision with wall surfaces of the honeycomb cavities. The period collision energy traps are arranged in a periodical manner, and based on contact and collision between the filled period collision energy trap mass blocks and the honeycomb sandwich structure, the honeycomb structure vibration energy can be effectively absorbed in a wide frequency range.

The present invention discloses a method for calculating a correction value of a dynamic penetration rod length in the field of geotechnical engineering in-situ tests taking into account multiple collisions. First, the initial value of the acceleration of the soil body on the probe rod is calculated, and then the drop hammer speed, the probe rod speed, and the probe rod kinetic energy increment after the ith collision are calculated until the speed of the drop hammer after the collision is equal to the speed of the probe rod or the speed of the drop hammer is equal to 0, and the calculation is stopped; the sum of the kinetic energy increment of the probe rod after each collision and the sum of the kinetic energy of the drop hammer at the end are used as the effective hammer energy of the dynamic penetration test, and the effective hammer energy of the dynamic penetration test is used to correct the acceleration of the soil body on the probe rod, and the iterative method is used to correct the effective hammer energy of the dynamic penetration test, and the iterative method is used to calculate the rod length correction coefficient. The present invention takes into account the characteristics of non-completely elastic collisions between the drop hammer and the probe rod, multiple collisions between the drop hammer and the probe rod, and the resistance of the soil body to the probe rod, and can provide guidance for the calculation of the correction value of the rod length in the dynamic penetration test.

The application relates to the technical field of glass detection, and specifically discloses a glass edge impact resistance detection device and method, which comprises a mounting frame, a plastic damping pipe, an adjusting assembly and an analysis mechanism. The plastic damping pipe is provided with a piston disc, and the piston disc is provided with an impact block. A first electric telescopic rod is vertically arranged on the mounting frame, a first negative pressure head is arranged on the telescopic end of the first electric telescopic rod, and a second negative pressure head is fixedly arranged on the mounting frame. The adjusting assembly can realize inelastic collision when the impact block collides with the glass edge, in the glass edge deformation process and in the glass edge deformation and rebound process, the damping received by the impact block is adjusted, thereby simulating the inelastic collision of the glass edge under different working conditions such as hail and flying stones, the collision time is prolonged to an observable range, and the defect sensitive area can be positioned. The analysis mechanism can also analyze the danger of the debris generated by the collision, and judge whether the glass edge has stress distribution imbalance.