76 results about "Static compression" patented technology

A hybrid compression garment comprises a sleeve adapted for placement on a limb of a person for applying static compression to the limb. A connecting device on the sleeve enables releasable connection of the sleeve to a machine. The machine is independent of the sleeve and operable to transmit, through the connecting device, a force to the sleeve that constricts the sleeve without inflating the sleeve to apply active compression to the limb. The connecting device is adapted for connection of the sleeve to the machine such that the sleeve can be used to apply active compression to the limb and adapted for disconnection of the sleeve from the machine such that the sleeve can be used to apply static compression to the limb. A method of applying compression to a limb of a person is also disclosed.

A Static Compression Device (SC device) for active, measurable compression of a fusion graft by the surgeon at the time of surgery is disclosed. The SC device is attachable to adjacent vertebral bodies or other pieces of bone and has a device that applies compressive force to the adjacent vertebral bodies or pieces of bone to assist fusion according to Wolffs law. The SC device has a locking mechanism that maintains the compression applied at surgery, but prevents further compression (settling) from occurring after surgery. The SC device allows the surgeon the ability to compress a segment, measure the applied compression, and lock the segment in the compressed position. In one embodiment of the invention, the pressure is applied to the SC device through a compression device that applies a desired and measurable amount of force. In this embodiment, the combination of the SC device with a pressure applying and measuring device allows the surgeon more control over the force applied to a cervical, thoracic or lumbar implant than has previously been available. In the preferred embodiment, the SC device compresses two or more adjacent vertebrae across an adjacent bone graft to facilitate fusion of these vertebrae to treat pain produced by pressure from the disks between such vertebrae bulging and resulting in contact with and pressure on the spinal cord and adjacent nerve roots. In other embodiments, the SC device may be used to apply measurable compression across any type of bony interface (e.g. fractures) to facilitate union.

A Static Compression Device (SC device) for active, measurable compression of a fusion graft by the surgeon at the time of surgery is disclosed. The SC device is attachable to adjacent vertebral bodies or other pieces of bone and has a device that applies compressive force to the adjacent vertebral bodies or pieces of bone to assist fusion according to Wolff's law. The SC device has a locking mechanism that maintains the compression applied at surgery, but prevents further compression (settling) from occurring after surgery. The SC device allows the surgeon the ability to compress a segment, measure the applied compression, and lock the segment in the compressed position. In one embodiment of the invention, the pressure is applied to the SC device through a compression device that applies a desired and measurable amount of force. In this embodiment, the combination of the SC device with a pressure applying and measuring device allows the surgeon more control over the force applied to a cervical, thoracic or lumbar implant than has previously been available. In the preferred embodiment, the SC device compresses two or more adjacent vertebrae across an adjacent bone graft to facilitate fusion of these vertebrae to treat pain produced by pressure from the disks between such vertebrae bulging and resulting in contact with and pressure on the spinal cord and adjacent nerve roots. In other embodiments, the SC device may be used to apply measurable compression across any type of bony interface (e.g. fractures) to facilitate union.

Systems, methodologies, and devices are described that facilitate transferring a subset of compression context from a source base station to a target base station during an inter-base station handover of a mobile device to facilitate establishment of compression context between the mobile device and target base station. The source base station can transfer a subset of compression context comprising static and semi-static context to the target base station during inter-base station handover to at least partially establish compression context between the mobile device and target base station prior to or during handover. The source base station can transmit, to the mobile device, indicator information related to compression context transferred. The target base station can at least partially establish compression context based on received subset of compression context to facilitate efficient communication with the mobile device and can establish any remaining portion of compression context with the mobile device after handover.

The invention discloses a high-temperature-resistant high-entropy alloy material and a preparation method thereof, and belongs to the technical field of the alloy materials. The preparation method comprises the steps that four of Ti, V, Nb, Mo, Ta and W are adopted as raw materials; the raw materials are smelted into mother alloy button ingots by a high-vacuum nonconsumable arc melting furnace under high-purity argon shielding; the four button ingots are mounted to be samples in the sizes of phi 20mmx10mm by a metallurgical phase mounting press; the surfaces of the samples are smoothed by 100#, 240#, 400#, 600#, 800#, 1000#, 1200# and 1500# metallurgical phase abrasive paper; then the samples are subjected to mechanical polishing; a crystal structure is determined by an X-ray diffractometer; a scanning electron microscope is used to observe the morphology of a microstructure; a room temperature quasi-static compression performance test is carried out; and the obtained four alloys have higher yield strength and work hardening capacity.

A hybrid compression garment comprises a sleeve adapted for placement on a limb of a person for applying static compression to the limb. A connecting device on the sleeve enables releasable connection of the sleeve to a machine. The machine is independent of the sleeve and operable to transmit, through the connecting device, a force to the sleeve that constricts the sleeve without inflating the sleeve to apply active compression to the limb. The connecting device is adapted for connection of the sleeve to the machine such that the sleeve can be used to apply active compression to the limb and adapted for disconnection of the sleeve from the machine such that the sleeve can be used to apply static compression to the limb. A method of applying compression to a limb of a person is also disclosed.

An apparatus and method for vibration suppression using a granular particle chain. The granular particle chain is statically compressed and the end particles of the chain are attached to a payload and vibration source. The properties of the granular particles along with the amount of static compression are chosen to provide desired filtering of vibrations.

The invention relates to the technical field of constructional engineering and bridge engineering shock isolation, in particular to a novel three-dimensional shock isolation device with large vertical static rigidity. The novel three-dimensional shock isolation device comprises a horizontal shock isolating component, a transition steel structure platform and a vertical shock isolating component. The horizontal shock isolating component and the vertical shock isolating component are arranged at the top and bottom of the transition steel structure platform respectively. A vertical damping element and a vertical static support are further included and both arranged at the bottom of the transition steel structure platform, and are parallel to the vertical shock isolating component. The device can achieve the shock isolating function both in the horizontal direction and in the vertical direction, horizontal shock isolation and vertical shock isolation are decoupled and do not implicate each other, and high safety is achieved. The vertical damping component can further relieve the vertical geological process through energy dissipation, the vertical static support can provide large vertical static compression resistance rigidity, meanwhile, certain tensile strength can be provided during a vertical earthquake, the safety of the upper structure is guaranteed, manufacturing is easy and convenient, and construction, mounting and maintenance are convenient.

A piezoelectric apparatus comprising a piezoelectric element that is held in static compression is manufactured using moldable materials and a molding process, e.g., injection molding or die casting. The static compression is caused by an intrinsic urge of the moldable material to expand, contract, or deform otherwise, which develops in the material during the hardening phase of the molding process. To enhance the usefulness of the device, a variety of inserts can be connected to the device and various features can be formed by the moldable material at the same time as the molding process takes place. Static preloads may also be caused by mechanically preloaded elements that are introduced during the molding process or by elements that concurrently introduced but that are permanently deformed thereafter.

The disclosed data business method based on VBD comprises: a. a data signal detector sets the energy decision threshold to compare with the signal frame energy, if signal frame energy over the threshold, determines the data frame as data signal frame to allow it enter speech coder for low-loss coding and output, or else as the non-data signal frame to allow it enter non-speech coder for static compression coding and output; and b. the receiving side sends the speech package to speech decoder to output effective data signal, or sends the static package to non-speech decoder to reconstruct the static signal. This invention reduces channel resource occupancy greatly.

The invention belongs to buffering and energy absorption components and discloses a buffering and energy absorption filling pipe. The problem that an existing foamed aluminum filling pipe is poor in energy absorption effect is solved. Aluminum-based composite foam materials are filler to be made into an aluminum-based composite foam filling pipe component, the energy absorption effect many times that of an ordinary foamed aluminum filling pipe component is achieved, the disadvantage that the aluminum-based composite foam materials cannot be independently used as an energy absorption or bearing structure due to poor intensity is overcome, and the high-intensity aluminum-based composite foam filling pipe component can fully play and integrate the advantages and mechanical property of various materials when bearing explosive blast, impact or other extreme loads, not only has the independent bearing capacity, but also has the outstanding advantages of being high in stability and energy absorption capacity and capable of working in the extreme environment and the like. Equivalent static compression tests are conducted on the buffering and energy absorption filling pipe and prove that the buffering and energy absorption filling pipe has the energy absorption capacity and mechanical property superior to those of the ordinary foamed aluminum filling pipe. Compared with a traditional hollow steel pipe and the ordinary foamed aluminum filling pipe, the crushing force and the energy absorption capacity are greatly improved.

The invention discloses a novel high static and low dynamic rigidity piecewise linear vibration isolator and a work method thereof. The novel high static and low dynamic rigidity piecewise linear vibration isolator comprises a spring formed by connecting an upper segment spring, a middle segment spring and a lower segment spring in series. When a vibration isolation object is installed above the novel high static and low dynamic rigidity piecewise linear vibration isolator, the upper segment spring generates a static compression amount, the middle segment spring is in a pre-compression state, and generates a pre-compression amount, the pre-compression amount is larger than the weight of the vibration isolation object, the lower segment spring is in a pre-stretching state, and generates a pre-stretching amount, and the pre-stretching amount is larger than the weight of the vibration isolation object. The novel high static and low dynamic rigidity piecewise linear vibration isolator can achieve demands for high static rigidity and low dynamic rigidity performance, and thereby achieves the purposes of not only guaranteeing static balance position stability, but also improving low frequency vibration isolation effects.

The invention discloses a longitudinally arranged power assembling suspension system matching method and system. The longitudinally arranged power assembling suspension system matching method comprises steps of arranging suspension points according to a four-pint suspension system; increasing two auxiliary suspension points with a target of enabling the static bending moment of the rear end surface of a flywheel casing to be equal to zero when the static bending moment of the four points is larger than the maximum bending moment; matching to obtain a rigid body model of a six-point suspension system, if the rigid body model does not satisfy an NVH (Noise Vibration and Harshness) design requirement and matching and acquiring the six-point suspension system within a setting range of a static compression amount under constraint conditions of enabling the static bending moment to be smaller than the maximum static bending moment, the vertical static rigidity of the middle suspension of the six-point suspension to be smaller than that of the rear suspension of the four-point suspension and the rigid body model to satisfy a requirement for the frequency difference in the NVH and with the decoupling rate of Z2 and RX direction being served as a maximum optimization target. The longitudinally arranged power assembling suspension system matching method can guide a designer to achieve matching of the six-point suspension system, reduces requirements for the designer, shortens the development period of the suspension system and saves the testing costs.

The invention relates to a cab design method based on a cab sound reduction index analysis. The cab design method comprises the following steps: (1) establishing a CAD (Computer-Aided Design) model of a cab assembly, carrying out mesh generation on the CAD model, and establishing a finite element model of the cab assembly; (2) based on the finite element model of the cab assembly, establishing a cab internal sound field and a cab external sound field; (3) according to the shape of a sealing strip in a current design drawing, establishing a finite element model of the sealing strip structure, and carrying out nonlinear static compression on the sealing strip according to a set amount of compression; (4) establishing a sound-solid-sound three-domain coupling model; (5) computing the sound reduction index of the cab; (6) judging whether the sound reduction index of the current cab meets the design requirement, if yes, taking the current design drawing as the final structure output of the cab, and otherwise modifying the shape and the amount of compression of the sealing strip in the design drawing, and returning to the step (3). Compared to the prior art, the cab design method disclosed by the invention has the advantages of reducing the internal noise of the cab, increasing the sound reduction index of the cab, improving the sealing performance, and the like.

The invention discloses a method for researching the influence of the pose of a lattice structure on its mechanical properties, wherein the research method comprises the following steps of s1, preparing a variety of lattice materials with different unit cell poses; s2, performing a static compression experiment on the lattice material and obtaining a stress-strain relationship curve of the corresponding lattice material from an experimental result. Further, the present invention provides a high-intensity lattice material and a high-elasticity lattice material by the research method.

The invention discloses a device for preparing high-pressure hydrogen by using metal hydrides and belongs to the technical field of static compression of hydrogen. The device comprises a control part, a heating loop, a cooling loop, a reaction bed, a circulation water pump and a gas pipeline, wherein the heating loop and the cooling loop are wound around the outer wall of the reaction bed at intervals and are connected to the circulation water pump respectively; the gas pipeline is arranged in a reaction bed body; the control part is connected to the gas pipeline of the device. By virtue of the device, the hydrogen is pressurized from 0.2MPa to 20MPa due to the adoption of AB2 type metal hydride such as Ti-Mn base and Ti-Cr base; the pressurization ratio reaches 100; the purity of the output gas reaches 99.999%; the accurate and continuous regulation of the hydrogen output pressure can be implemented by temperature / pressure double alarm control manners of the system, thereby ensuring that the device works under the safe temperature / pressure range and ensuring the safety of the system. The device also has the advantages that the structure is simple, the noise is avoided, the vibration is also avoided, and low-quality waste heat can be utilized.

The invention discloses a quasi-zero rigidity inertia actuator which comprises a shell, a movable component and a driving component. The movable component is provided with a first supporting component and second supporting components, the first supporting component elastically supports the movable component in the vertical direction, the movable component transmits force to a base through the first supporting component, and the driving component transmits force to the base; and the at least two second supporting components are elastically connected with the movable component in the horizontal direction and are evenly arranged in the circumferential direction of the movable component, the first supporting component is in a static compression state or dynamic compression and stretching alternative state in the vertical direction, and the second supporting components are in a static compression state or dynamic compression state in the horizontal direction. The first supporting component forms a high-static low-dynamic rigidity supporting assembly, the inherent frequency of an assembly formed by the movable component, the first supporting component and the second supporting components can be reduced, the frequency can be close to zero frequency in the ideal state, and the low-frequency even ultra-low-frequency output of the actuator can be increased under the condition that the size and the input current are not increased.

The invention relates to a nonlinear dynamic modeling method of an undercarriage wheel, belonging to a helicopter theoretical modeling technology. The nonlinear dynamics modeling method is characterized by comprising the following steps: carrying out vertical rigidity modeling, lateral rigidity modeling, course rigidity modeling and torsional rigidity modeling on the wheel according to structure parameters (inflation pressure, diameter and width) of the wheel, carrying out vertical damping modeling, lateral damping modeling, course damping modeling and torsional damping modeling on the wheel, solving an undermined coefficient in a model according to the static compression characteristic of the wheel and the dynamic rigidity damping test data by using a least square method, and acquiring an analytical expression capable of accurately simulating the nonlinear dynamic characteristic of the wheel in a time domain. The nonlinear dynamics modeling method disclosed by the invention can be used for dynamic characteristic analysis for the center of a propeller hub of a helicopter and ground resonance analysis, so that the accuracy of ground resonance stability analysis can be improved, great error caused to ground resonance analysis by linear processing is avoided and the helicopter weight cost caused by linear processing is avoided.

The invention relates to an implantable corrosion-proof preformed pile for use in a salt oil foundation and a construction method thereof. A corrosion-proof effect is achieved by prefabricating a pile body and a pile tip and tightly wrapping the pile body with a soil synthesized material and a corrosion-proof material. In a construction process, the pile tip is pre-delivered to a designed level first, then the pile body is protected and implanted into a pile hole to be jointed with the pile tip, and a gap between the hole and the pile is compacted later. The method has the following advantages that: 1, the integrity of a corrosion-proof layer outside the pile body is guaranteed; and 2, the engineering properties of the pile are guaranteed to be identical with those of static compression and driving pile sinking, the construction speed of the method is higher than that of a pouring pile or other pile construction, operation is easy, the corrosion-proof layer of the pile body is protected from damage, the corrosion-proof effect is good, engineering cost is reduced, a great amount of materials are saved, and the engineering quality of the foundation in salt soil areas is guaranteed. The implantable corrosion-proof preformed pile and the construction method thereof are suitable for pile foundation engineering of the salt soil foundation.

A system and method for compressing data. The system and method employ a static compression dictionary, or look-up table, containing a predetermined number of uncompressed data values and corresponding compressed code values for replacing uncompressed data values with their corresponding compressed code values to reduce data storage requirements. The system and method further employ a dynamic compression dictionary, to which uncompressed data values and corresponding compressed code values are added as required to compress uncompressed data values not contained within the static compression dictionary.

The present invention is a device for testing the mechanical properties of a specimen. The device includes an actuator component slider for positioning the specimen within one of multiple test configuration positions, such that each test configuration position examines the static compression / tension properties, dynamic compression / tension properties, static torsional properties, or dynamic torsional properties of the specimen.

A Static Compression Device (SC device) for active, measurable compression of a fusion graft by the surgeon at the time of surgery is disclosed. The SC device is attachable to adjacent vertebral bodies or other pieces of bone and has a device that applies compressive force to the adjacent vertebral bodies or pieces of bone to assist fusion according to Wolff's law. The SC device has a locking mechanism that maintains the compression applied at surgery, but prevents further compression (settling) from occurring after surgery. The SC device allows the surgeon the ability to compress a segment, measure the applied compression, and lock the segment in the compressed position. In one embodiment of the invention, the pressure is applied to the SC device through a compression device that applies a desired and measurable amount of force. In this embodiment, the combination of the SC device with a pressure applying and measuring device allows the surgeon more control over the force applied to a cervical, thoracic or lumbar implant than has previously been available. In the preferred embodiment, the SC device compresses two or more adjacent vertebrae across an adjacent bone graft to facilitate fusion of these vertebrae to treat pain produced by pressure from the disks between such vertebrae bulging and resulting in contact with and pressure on the spinal cord and adjacent nerve roots. In other embodiments, the SC device may be used to apply measurable compression across any type of bony interface (e.g. fractures) to facilitate union.

The invention discloses a determination method for densification strain of a cushion packaging material, comprising the following steps: performing a static compression test on the cushion packaging material, drawing a force-displacement curve, then performing conversion according to the force-displacement curve, thus a stress-strain curve is obtained, calculating unit volume deformation energy ofeach point on the stress-strain curve and energy absorption efficiencies of the cushion packaging material, according to the energy absorption efficiencies corresponding to different stress values, determining the densification strain of the cushion packaging material, namely maximum strain before the material loses cushion characteristic, and then determining cushion energy absorption characteristic of the cushion packaging material.

The invention provides a preparation method of a low-compression and permanent-deformation microcellular polyurethane elastomer, belonging to the field of a preparation method of a microcellular elastomer. The preparation method solves the problem that the microcellular polyurethane elastomer obtained by the existing preparation method is poor in compression and permanent-deformation performance. The method comprises the following steps: reacting a polymer polyol and p-phenylene diisocyanate at 70-80 DEG C to obtain a prepolymer, wherein the content of -NCO group in the prepolymer is less than or equal to 6.2%; and then mixing polyhydroxy compound with a foaming agent, a catalyst 1, a catalyst 2 and a surfactant to obtain a chain extender, then uniformly stirring the obtained prepolymer and chain extender to obtain a mixture, vulcanizing, demolding and after-vulcanizing the mixture to obtain the low-compression and permanent-deformation microcellular polyurethane elastomer. The microcellular polyurethane elastomer prepared by the method has the static-compression and permanent-deformation performance up to 0.53%.

A variable pitch spiral compression machine head mainly comprises a dynamic spiral rotor with multistage vanes, multistage axial static diffuser rings and a static compression cover. By means of the method that the spiral ascent angle and the pitch of a spiral compression vane are adjusted stage by stage, the distance between adjacent spiral vanes and the passage section area are changed. By means of the multistage compression method that the spiral vanes rotating at a high speed press in a centrifugal mode stage by stage and the method that the multistage diffuser rings are arranged axially and diffuse pressure axially, the process that gas is pressed in a centrifugal mode and pressurized stage by stage is achieved. A high pressure ratio can be generated, high pressure can be borne, the diameter of a cylinder of a compressor is reduced, and miniaturization of the compressor is facilitated. The number of the spiral vanes of the compressor, the diameter of a base circle, the number of compression stages, the pitch of the spiral vanes and other important design parameters can be determined according to compressible performance of actual gas and the pressure ratio of the gas, and the compressor can be designed flexibly. By means of the long cylindrical compression machine head, the heat conductive area of the cylinder is increased, the compression process is close to the constant-temperature compression process, and compression work is reduced.

The invention belongs to the technical field of evaluation of long-term performance of a buffer material, in particular to a preparing method of a high-compactness semicircular bentonite block of a buffer material test bed. The technical purpose is to provide the preparing method of the high-compactness semicircular bentonite block of the buffer material test bed aiming at insufficiencies in the prior art. A method of using single-shaft static compression to prepare the high-compactness semicircular bentonite block of the buffer material test bed is adopted so that the high-compactness semicircular bentonite block which is uniform in density, small in dimensional deviation, and meets the requirements of buffer materials of a high-level radioactive waste deep geological disposal repositorycan be prepared. According to the technical scheme, the method comprises the following steps of 1, compression preparation, 2, displacement control compression, 3, load control compression, 4, secondary displacement control compression and 5, compression molding.

The invention discloses a mattress elasticity evaluation method. The method comprises the following steps that: a, static compression is carried out on a mattress material sample; b, stress relaxationchange in the static compression process are recorded, so that a trend equation that epsilon=at+b is obtained, wherein the parameter t represents static compression time, epsilon represents stress relaxation, a represents slope, and b represents stress relaxation at the moment of 0; d, weighted summation averaging is performed on stress relaxation change Delta epsilon i in more than one static compression time period Delta ti, so that a weighted average value delta is obtained, wherein i represents the ith time period Delta ti, n represents n Delta ti time points, and fi represents the weightof the stress relaxation change Delta epsilon i; and e, the elasticity of a mattress is judged according to an obtained Delta value, wherein the Delta value and the elasticity of the mattress are ina monotonically decreasing relationship. According to the mattress elasticity evaluation method of the invention, a mattress elasticity quantification method is established. Compared with a traditional elasticity evaluation method, the mattress elasticity evaluation method is more accurate in evaluation.

A vehicle wheel suspension system includes two relatively movable portions and a resilient blade that includes two means for mechanical connection to both relatively movable portions, respectively. The blade has a flexural resilience at least 100 times greater than the tensile resilience, and is resiliently deformable between: a resting state in which the blade has an inwardly curved profile, and a maximally extended state in which the blade has an elongate profile, the length of which corresponds to that of the neutral fiber of the blade, while passing through intermediate extension states in which the blade has profiles that are less and less inwardly curved. The suspension system is deformable between an initial state in which the relatively movable portions are in a close configuration and a compressed state in which the relatively movable portions are in a separated configuration and bias the blade.

The invention discloses a method for testing the axial compression performance of a carbon fiber composite material and a constitutive model. The method comprises the following steps: firstly, carrying out axial quasi-static compression on a carbon fiber composite material test part by adopting an MTS universal testing machine to obtain low-strain-rate compression performance; then, carrying out axial dynamic compression experiment on the carbon fiber composite material test part through an SHPB experiment device to obtain high-strain-rate compression performance; secondly, verifying the rationality of a quasi-static experiment by adopting a composite material mixing law, verifying the accuracy of a dynamic compression experiment by adopting a waveform change relationship, and proposing ajoint buckling strength calculation formula; and finally, introducing a strain rate item to fit an experimental result to obtain the stress-strain constitutive model of axial compression of the carbonfiber composite material. The constitutive model obtained by the invention can accurately describe the mechanical properties of the axial compression of the carbon fiber composite material, and can provide reference for numerical simulation and axial compression performance test of other similar materials.