103results about How to "Eliminate jumping" patented technology

A torsional vibration damper includes a one-piece integral hub and annular inertia mass assembly. Between the hub and the inertia mass are intermediate rings connected integrally with the mass and the hub connected integral spokes. Elastomeric members are compression fitted within spaces formed between the hub and the mass.

The invention relates to a method of detecting glass defects based on a phase image processing. The method utilizes a glass defect detection system based on the phase image processing; and comprises that light emitted from a light source passes through a raster and forms moire showing a cosine distribution of light intensity on surfaces of to-be-detected glasses, a high-speed linear-array camera collects the moire patterns on the surfaces of the glasses which are then transmitted to an industrial control computer through an image acquisition card, and a defect detection and processing software installed on the industrial control computer timely processes the moire patterns to obtain binary defect images. The method is characterized by firstly subtracting corresponding points of main value images of reference phases respectively containing glass defects and being free of defects, eliminating hopping in the subtraction results by using a hopping error correction algorithm, segmenting into binary images for the glass defects through a mathematical morphology and a segmentation algorithm of combined high and low thresholds, and finally determining the glass defects according to data of the binary images. The method can greatly reduce influences of system noises, improve an operation speed and realize rapid and accurate detection for the glass defects.

The invention belongs to the field of aerospace craft guidance, and aims to enable an RLV to still obtain a guidance instruction enabling a track to strictly meet heat flow, overload and dynamic pressure constraints under the condition that the RLV is affected by external disturbance and uncertain factors, and finally land at an appointed runway position at a proper speed. Therefore, the technicalscheme adopted by the invention is as follows: the full-stage reentry return guidance method for a reusable launch vehicle comprises the following steps of: 1, guidance of an initial descending section; 2, gliding section guidance; 3, guidance of a terminal energy management section; 4, automatic landing section guidance: keeping the heeling angle to be 0 in the transverse direction; in the longitudinal direction, the automatic landing section is designed to be formed by combining a quasi-balanced gliding section and an exponential gliding section, an attack angle instruction is determined bydesigning a track angle function, and the height of a switching point of the two sections is designed through a secant method, so that the RLV can make contact with the ground at a preset speed and atrack angle. The method is mainly applied to aerospace craft guidance occasions.

The invention relates to the reasonable research on the arrangement of road traffic identifier markings, in particular to a method for establishing a simulation experiment platform of a road traffic virtual identifier marking, comprising the following steps: firstly, a camera is utilized to simulate the visual field of a driver and shoot the scene video of an actual road as the original video; secondly, the path tracking parameters of the camera are obtained; then, a drawn identifier marking line is added on to the original video by utilizing the function of adding a camera of Maya software to obtain the real scene video with virtual identifier marking as the simulation scene after video synthesis and rendering process; and finally, the simulation video is input into a simulation driving system and matched with a driving simulator, and then the simulation experiment on virtual identifier marking based on road real scene video can be carried out.

The invention discloses a high-precision satellite pulse per second synchronous punctuality device and method. The method is characterized in that phase difference detection of 1PPS signals is realized by using flip phase discrimination in the process of realizing synchronous punctuality, and the output phase of 1PPS is accurately controlled in real time by combining stepping compensation and phase shift alignment so that an accumulated error of a local clock and hopping of satellite 1PPS signals are well eliminated, high-precision synchronous punctuality is realized, during satellite synchronization, synchronization precision of 1PPS output is superior to 16ns; when a satellite is disconnected, the local punctuality is 24 hours, the error is less than 3 microseconds, moreover, online configuration of the output 1PPS pulse width is supported.

The invention discloses an inner armature type high precision positioning electromagnet which comprises a shell, an armature, a coil, an end cover and a positioning shaft. One end of the shell is sealed through the end cover, three supporting assemblies are arranged at the end, far away from the end cover, of the shell, bearings of the three supporting assemblies are all tightly attached to the positioning shaft, and the positioning shaft can move freely in the axial direction of the positioning shaft. Two supporting assemblies are fixed supporting assemblies, another supporting assembly is a movable supporting assembly, and a kidney-shaped hole is formed in a supporting block of the movable supporting assembly in the length direction of the supporting block. A screw sequentially penetrates through a pressing plate and the kidney-shaped hole and then is connected with the shell. A compressed spring is arranged at the end, far away from the positioning shaft, of the movable supporting assembly, one end of the compressed spring is fixedly connected with the shell, and the other end of the compressed spring is tightly pressed on the supporting block of the movable supporting assembly. By means of the inner armature type high precision positioning electromagnet, gap variation caused by temperature variation can be compensated automatically, and high positional accuracy and low temperature drift are achieved.

The invention relates to a structure for reducing pressure and subsidence of behind-abutment earth for a bridge and a construction method thereof. The structure comprises a bridge abutment, wherein the bridge abutment supports a main beam; the abutment front side of the bridge abutment is provided with an in-front-of-abutment revetment; the abutment rear side of the bridge abutment is provided with behind-abutment filling earth; a corrugated plate which is vertically arranged is arranged between the bridge abutment and the behind-abutment filling earth; concave parts and convex parts in the corrugated plate are vertically alternately arrayed; the concave parts are filled with shrinkable materials in two sides of the corrugated plate. The structure is used for effectively preventing the behind-abutment earth from generating subsidence and falling off, preventing a behind-abutment splice plate from generating the subsidence, eliminating distress of bumps at bridge-head and the like, improving running safety and smoothness and decreasing a maintenance cost of the bridge, can be used for improving an entire lifecycle of the bridge, is used for prolonging and improving a service life period and the traffic capacity of the bridge, has advantages of simple structure, high universality, convenient construction and the like, and meanwhile, has important practical significance and engineering application value.

A presser inspection well cover comprises a flexible structure and a rigid structure, wherein the presser inspection well cover mainly comprises a bovine ear type well seat (4), an anchor bolt assembly (1), an elastic pressure plate (2), a three-oil two-network plastic washer (3) and a concrete well cap (5), wherein the lower end of the anchor bolt assembly (1) is anchored in the concrete well cap (5) and positioned outside the bovine ear type well seat (4), the three-oil two-network plastic washer (3) is cushioned between the bovine ear type well seat (4) and the concrete well cap (5), the elastic pressure plate (2) is sleeved on the anchor bolt assembly (1), one end of the elastic pressure plate (2) is against the bovine ear type well seat (4) and the other end is against the supper surface of the concrete well cap (5), and a rigid presser inspection well cover is internally provided with at least one three-oil two-network plastic washer (3). The invention can effectively eliminate the flexible road slit and the rigid road broken edge around an inspection well, prolongs the service life of the road, saves the road building and maintenance cost, and saves the fuel cost and the maintenance cost of an engine.

A high-voltage power supply for the electrostatic oil soot exhauster is composed of input rectifier, power amplifier, high-voltage transform circuit, high-voltage output rectifier, amplitude modulator, and frequency modulator.

The invention relates to a yarn tensioner of a nylon zipper sewing machine. The yarn tensioner of the nylon zipper sewing machine comprises a yarn feeding wheel, a yarn discharging wheel and a tension control assembly, wherein the tension control assembly comprises a mounting seat tension wheel and a back tension wheel; the yarn feeding wheel, the back tension wheel and the yarn discharging wheel are separately arranged on a mounting seat transversely in a spaced manner; a yarn body winds the front tension wheel and the back tension wheel in a spaced manner; the yarn body winds the front tension wheel and the back tension wheel by arranging the front tension wheel and the back tension wheel to eliminate jumping of the yarn body; and in conditions that when the number of winding rings of the yarn body on the front tension wheel and the back tension wheel is one, although the yarn body is of a sort of jumping, and when the number of winding rings are two and three, the poor jumping of the yarn body is substantially eliminated, the yarn tension value is stabilized, and meanwhile, the yarn interrupting rate is decreased, and the product quality is further enhanced, so that the production line equipment is more reasonable in automation.

The invention relates to a handlebar, and discloses a hook-type front fork and handlebar fast disassembly bicycle structure comprising a handlebar stand, the lower part of which is provided with a frame head tube and a headset. The lower end of the handlebar stand is provided with a front fork, and the upper part of the handlebar stand is provided with a bolt, which is in a threaded connection with a nut. The upper part of the front fork is provided with a front fork head tube vertical tube pin shaft, which is connected with a clamping slot disposed in the bottom part of the handlebar stand ina clamped manner. The upper part of the handlebar stand is provided with a handlebar pin shaft hole, which penetrates a connection pin shaft. The pin shaft is rotatably connected with a hook throughhole in the upper end of the hook, and the upper part of the hook is provided with a button. The lower part of the hook is slidably connected with a guiding slot disposed in the middle part of a maintaining rack, and the left side of the maintaining rack is provided with a maintaining rack side hole. The technical scheme provided by the invention is suitable for the hook-type front fork and handlebar fast disassembly bicycle structure, and by arranging the hook, the handlebar is connected with the front fork, the whole connection is firm, and the clamping is prevented from being loosened, andtherefore the radial jump is eliminated. The whole device has advantages of simple operation, convenient disassembly, and applicability in popularization and application.

The invention discloses a head of a pantograph. The head of the pantograph comprises a supporting structure, a roller structure and a connecting structure, wherein the roller structure can be contacted with a contact line to realize the conduction with the contact line, and the cylinder structure rolls in the axial direction of the contact line; and the connecting structure is used for connectingthe roller structure and the supporting structure, and the connecting structure enables the roller structure to move on the supporting structure in the radial direction of the contact line. Accordingto the head of the pantograph, the sliding friction between a sliding plate of the head of the pantograph and the contact line in the horizontal direction and longitudinal direction is avoided, the current collection effect between bow nets is greatly improved, and at the same time, the maintenance and overhaul are convenient, and the maintenance cost is reduced.

The invention relates to an integrated imaging light field information acquisition and display method which comprises the following steps: establishing an integrated imaging model which comprises a detector, an acquisition micro-lens array, a display screen and a display micro-lens array; acquiring three-dimensional light field information of n different viewing angle areas of each acquisition micro lens through the detector, and generating a micro-unit image array, wherein n is greater than or equal to 2; equally dividing the persistence time of human vision into n time periods, wherein n isgreater than or equal to 2; and taking the micro-unit image array as a data source of the display screen, and sequentially displaying the micro-unit images corresponding to the ith viewing angle areaof each display micro-lens in a three-dimensional space in the ith time period, wherein i = 1, 2,..., n. According to the method, the tunable backlight direction and display screen content refreshingcan be accurately controlled, the micro-unit image information of different observation view angles is loaded at different moments within the human eye vision persistence time range, the crosstalk phenomenon is eliminated, and crosstalk light is converted into useful reproduced images.

The invention discloses a magnetic suspension bearing high in reliability. The magnetic suspension bearing comprises a bearing body, an electromagnet, a stator disc, a first stator, a first damping ring, a rotor, a magnet, a limiting groove, a dynamic monitoring device, a second damping ring, a rotor sleeve, a position monitor, a second stator, a display screen, a connecting line, a starting switch, a laminating block, an embedded plate, an oil storage layer and a guide hole; the stator disc is arranged in the bearing body, the rotor is arranged in the middle of the side end of the stator disc, the rotor sleeve is arranged on one side of the rotor, the first damping ring is arranged on the outer wall of the rotor, the dynamic monitoring device is arranged at one end of the bearing body, the electromagnet is arranged on one side of the stator disc, the first stator is arranged on the other side of the stator disc, the limiting groove is formed in the side end face of the first stator, and the relative gap is reserved between the oil storage layer and the rotor all the time. Therefore, normal running of the rotor is not affected, and use needs of wide customers can be met.