95 results about "Wave trough" patented technology

The invention provides a three-dimensional skin waviness fitting analysis method. The method comprises the following steps: performing boundary analysis on skin point cloud data obtained by laser measurement, performing interpolation sampling from the point cloud data according to a specified area and resolution to obtain point cloud coordinates which can reflect the real condition of the skin and are regularly arranged, performing bicubic spline surface least square approximation based on a sampling point set, and calculating the skin point cloud data according to the bicubic spline surface least square approximation. The method comprises the following steps: acquiring a reference curved surface reflecting the overall distribution trend of an analysis area, calculating distance deviation from a sampling point to the reference curved surface, carrying out filtering smoothing processing, forming a smooth deviation curved surface capable of reflecting the deviation condition of a measurement curved surface, extracting information such as wave crest and wave trough positions, wave amplitude, wavelength and slope in the deviation curved surface, and carrying out skin waviness characteristic analysis. According to the method, the tiny waviness characteristics of the irregular curvature surface of the aircraft can be extracted, the skin waviness distribution condition can be visually displayed, and the method has the advantages of being wide in applicability, small in error, high in reliability, low in time cost and the like.

The invention relates to the technical field of electric energy conversion, and discloses a high-frequency resonant topology-driven isolation power conversion system, which comprises a power conversion circuit, a driving unit, a feature sensing unit and a logic regulation and control unit, and is characterized in that the logic regulation and control unit extracts a parasitic ringing extreme point of a voltage evolution waveform in dead time; a charge release balance point is determined by calculating an arithmetic mean value of the first wave crest and the first wave trough, and high-frequency parasitic parameter interference is stripped; and predicting a time domain window of a return-to-zero potential based on a charge release balance point, performing phase compensation on a driving pulse in the time domain window according to a voltage waveform second derivative feature, and locking the starting moment of a switching tube at a zero voltage point. Interference of high-frequency distribution electromagnetic parameters on conduction judgment is eliminated, and soft switching self-healing in a full-load domain is achieved.

The invention discloses a rolling force calculation method for longitudinal wave rolling of a metal plate, and relates to the technical field of rolling. The rolling force calculation method for longitudinal wave rolling of the metal plate comprises the steps that based on rolling parameters of longitudinal wave rolling equipment and a neutral angle in the rolling process of the longitudinal wave rolling equipment, plastic deformation area rolling force at the wave trough position and the wave waist position of the longitudinal wave rolling equipment is determined; and the total rolling force of the plastic deformation area of the longitudinal wave rolling equipment is determined according to the rolling force of the plastic deformation area at the wave trough and the wave waist of the longitudinal wave rolling equipment. Accurate calculation of the total rolling force of the plastic deformation area is achieved, and the calculation efficiency of the rolling force is improved.

The application provides an ultrasonic fingerprint readout circuit, an ultrasonic fingerprint chip and an ultrasonic fingerprint module. The ultrasonic fingerprint readout circuit comprises a sensing circuit, a single-ended-to-dual-ended circuit and a bidirectional integration circuit which are coupled in sequence. Compared with a conventional ultrasonic fingerprint readout circuit, two noise sources are saved, bidirectional integration (integration from a wave peak to a wave trough and from a wave trough to a wave peak) is realized through a differential working mode, the output signal quantity is doubled, the output noise is reduced, the signal-to-noise ratio is greatly improved, the anti-interference capability is better, and the additional circuit cost is not increased too much.

The invention provides a spiral-like sensing assembly and an imaging system thereof, and belongs to the technical field of sensing and detection. The sensing assembly comprises a bottom lining layer and a vibration diaphragm layer, the bottom lining layer is of a spiral-like cavity structure, the vibration diaphragm layer comprises a supporting layer, a plurality of electrode layers and at least one piezoelectric layer, and the positions of the supporting layer, the electrode layers and the piezoelectric layer correspond to each other and are geometrically matched. The plurality of sensing units with different sizes are arranged according to a spiral-like path, and the wave crests and the wave troughs of sensitivity curves are mutually compensated and coupled; the imaging system is composed of a spiral array formed by the sensing assembly, a sound wave emission unit, a central processing module and a display device, and the array further comprises a sound impedance matching layer to improve the sound energy transmission efficiency. The response bandwidth of the sensing assembly is effectively widened, the detection sensitivity and precision of the imaging system are remarkably improved, and the method can be applied to target detection, position calibration and route planning, underwater acoustic communication transmission, fishery breeding monitoring, geological structure exploration and the like; and a certain reference is provided for exploration of light weight and informatization of future equipment.

The invention discloses an intelligent flood prevention method for a water conservancy project, and relates to the technical field of water conservancy project flood prevention. Performing feature extraction of in-segment peak attenuation gradient, trough rise amplitude difference and change rhythm drift total value on the jump sequence map, and constructing a signal interference feature vector group to determine signal interference features; and based on the signal interference feature vector group, extracting a disturbance dimension, a disturbance intensity and a historical interference reproduction rate corresponding to the shielding disturbance as input parameters, and constructing a credibility identification variable set. In order to solve the problem that water level data continuously jumps and is easily misjudged as real data due to the fact that water surface sensing equipment is shielded by floating objects in intelligent flood prevention for hydraulic engineering, accurate identification, hierarchical management and control and dynamic scheduling correction of interference data are realized by constructing a jump map, an interference feature vector and a credibility evaluation system.

A drag chain with a corrugated bending radian comprises an upper cover and a lower cover which are buckled with each other, the upper cover and the lower cover are integrated corrugated hoses with wave crests and wave troughs alternately appearing to form corrugated contours, and the corrugated contours have flexibility and are flexibly bent towards the direction of the upper cover. The corrugated contours of the upper cover and the lower cover comprise side parts located on the two sides in the width direction and middle sections located on the side parts gradually, and the two ends of each middle section are bent gradually from the connecting positions of the side parts to the direction of the center line, so that the middle sections have radians protruding towards the direction of one side. According to the technical scheme, the protruding radians are arranged on the wave crests on the corrugated outline, so that when the drag chain is flexibly bent in the movement process, a space with a larger bending radian can be formed between every two connected wave crests, the radius of flexible bending can be reduced, and the flexibility of the drag chain is improved. Therefore, the bearing capacity and the tensile property of the drag chain can be improved.

The invention provides a ground material type detection method and equipment, which can be applied to the technical field of autonomous mobile equipment. The method comprises the following steps: transmitting ultrasonic waves to the ground, and receiving echoes of the ultrasonic waves to obtain an echo waveform diagram; the longitudinal axis of the echo waveform diagram is positively correlated with the echo intensity, and the transverse axis of the echo waveform diagram is positively correlated with the time; identifying wave troughs in the echo waveform graph; determining the number of echo groups in the echo waveform diagram according to the wave troughs; and determining a ground material type according to the number of the echo groups. The ground material type is detected through the number of the echo groups of the ultrasonic waves, and the detection accuracy of the ground material type can be improved. Moreover, only one ultrasonic sensor is needed to detect the type of the ground material, the occupied space is small, and the cost of the autonomous mobile equipment is reduced.

The invention discloses a hollow outer rotor single-channel winding type rotary transformer and system. The transformer comprises a stator, a rotor, an excitation winding, a sine signal winding and a cosine signal winding. The rotor is sleeved outside the stator; the rotor comprises magnetic conductive materials located at the two ends of the rotor, a gap is formed between the two magnetic conductive materials, and sine ripple structures are arranged on the surfaces, making contact with the gap, of the two magnetic conductive materials. The wave crests and the wave troughs of the two sine ripple structures are oppositely arranged; the excitation winding is arranged on the rotor; the sine signal winding and the cosine signal winding are arranged on the stator. The transformer has the advantages of being high in measurement precision and small in size.

The invention provides a preparation method of a composite board with excellent interface bonding, which comprises the following steps: if the processing and using temperature of the composite board is less than or equal to 200 DEG C, polishing one side surface of a base material blank until the roughness is 0.02 T + 0.05 t + 0.5 CR <-5 >-0.02 T + 0.05 t + 0.5 CR, T is a preset heat treatment temperature unit of DEG C, t is a total heat treatment time unit of min, CR is a preset total compression ratio, and if multiple heat treatments are needed, T is a maximum value; if the processing and using temperature of the composite board is higher than 200 DEG C, the surface of one side of the base material blank is polished into a wave shape, the vertical distance between the wave crests and the wave troughs is 0.1 T-85-0.1 T-80, the unit is mm, the horizontal distance between the wave crests is 100-12.5 lnT-110-12.5 lnT, and the unit is cm. The surface of the base material blank is subjected to different treatments through different processing use temperatures, so that the bonding strength of the base material and the covering material is guaranteed.

Embodiments of the present application disclose an ultrasonic transducing assembly and an ultrasonic transducing array, which can improve the working bandwidth of the ultrasonic transducing assembly. The ultrasonic transducing assembly comprises a substrate, at least one first PMUT unit and at least one second PMUT unit, and the first PMUT unit and the second PMUT unit are located on the substrate. The cross-sectional shape of the first PMUT unit has a long axis and a short axis, and the cross-sectional shape of the second PMUT unit has a long axis and a short axis, and the cross sections are parallel to the substrate. The size of the first PMUT unit is different from the size of the second PMUT unit. The difference between the frequency corresponding to the wave peak position on the sensitivity curve of the first PMUT unit and the frequency corresponding to the wave trough position on the sensitivity curve of the second PMUT unit is less than a preset value, and / or the difference between the frequency corresponding to the wave trough position on the sensitivity curve of the first PMUT unit and the frequency corresponding to the wave peak position on the sensitivity curve of the second PMUT unit is less than a preset value.

A padding article includes a sheet formed according to a wave pattern to include a wave crest. A wave trough is connected to the wave crest. A first plurality of dimples is formed along either the wave crest or the wave trough. A cushion assembly and a packaging assembly are also disclosed.

The invention relates to the technical field of tunnel monitoring, and discloses a device and method for monitoring deformation of an existing subway interval tunnel caused by pipe-jacking construction, and the device comprises an optical fiber which is laid on the arc surface of the inner wall of the tunnel in a snake-shaped wave shape, and the optical fiber is spread towards the two sides with the top of the tunnel as the center. And bending back and forth between the left and right side walls while extending longitudinally along the tunnel, so that the crest part is positioned on one side wall of the tunnel, the trough part is positioned on the other side wall of the tunnel, and the crest part and the trough part are flush in height in the cross section of the tunnel. The optical fiber is laid on the arc surface of the inner wall of the tunnel in a snakelike wave shape, radial deformation of the section of the tunnel is converted into axial strain of the optical fiber through wave geometry, and meanwhile the optical fiber extends in the longitudinal direction and can also sense longitudinal differential settlement.

The utility model relates to the technical field of corrugated boards, in particular to a corrugated board with a honeycomb structure, which mainly solves the problems of low longitudinal compressive strength and poor buffering performance of a honeycomb paperboard in the prior art, and comprises a corrugated board body which comprises a surface layer, a middle layer and a bottom layer, the surface layer comprises a first surface layer, a second surface layer with a wave structure and a third surface layer with a wave structure, the second surface layer is provided with a second wave crest and a second wave trough, the third surface layer is provided with a third wave crest and a third wave trough, the lower surface of the second wave trough is compositely connected with the upper surface of the third wave trough, and the amplitude of the second wave crest is larger than that of the third wave crest; a plurality of grooves are concavely formed in the upper surface of the middle layer, the upper surface of the middle layer is in composite connection with the lower surface of the third surface layer, the third troughs are embedded in the grooves, and the upper surface of the bottom layer is in composite connection with the lower surface of the middle layer.

The invention belongs to the technical field of rubber mat connection of plate heat exchangers, and provides an anti-degumming rubber mat for a heat exchange plate. The anti-degumming pad comprises an anti-degumming pad main body and a sheet main body, the plate sheet main body is arranged on the anti-degumming pad main body and is used for being matched with a hanging groove in a heat exchange plate; the anti-degumming pad main body is provided with a first connecting arm and a second connecting arm; wherein the first connecting arm and the second connecting arm are arranged on one side of the anti-degumming mat main body; the plate sheet main body is provided with a rubber mat groove, a first wave crest, a first wave trough, a first connecting arm groove, a second wave crest, a second wave trough, a second connecting arm groove and a third wave crest; the rubber mat main body is connected with the first connecting arm and the second connecting arm; the rubber mat main body is arranged in the rubber mat groove; the first connecting arm groove and the second connecting arm groove are formed in the outer side of the rubber mat groove; the thickness of the rubber mat groove is equal to the thickness of the first connecting arm and the second connecting arm after compression; the first wave crest, the first wave trough, the second wave crest, the second wave trough and the third wave crest are sequentially arranged along the outer side wall of the plate sheet body.

The invention relates to a heating module (10) comprising a heating assembly (11) and a spring element (12) for transmitting a pressing force (F) to the heating assembly (11), wherein: the spring element (12) comprises at least one spring portion (13); the spring portion (13) has a wave shape, the wave shape comprising at least one wave crest (14) remote from the heating assembly (11) and at least two wave troughs (15) next to the heating assembly (11); and the spring portion (13) is in contact with the heating assembly (11) at least in two contact regions (KB) formed by the wave troughs (15).

The invention discloses a corrugated pipe fixed-length measuring device, cutting equipment and a method, the corrugated pipe fixed-length measuring device comprises a floating mounting rack capable of floating up and down and at least one roller rotatably mounted on the floating mounting rack, and the roller is in rolling contact with a to-be-cut corrugated pipe to support and measure the movement of the to-be-cut corrugated pipe. An inductive switch and a triggering piece are further installed on the floating installation frame, the triggering piece is hinged to the floating installation frame, and the first end of the triggering piece is configured to be in contact with the peripheral face of the corrugated pipe all the time under the action of the elastic piece so as to move up and down along with wave crests and wave troughs of the corrugated pipe; the inductive switch is configured to send a pulse signal to the outside when the trigger piece moves to a specific position corresponding to the wave crest or the wave trough. The corrugated pipe fixed-length cutting equipment is provided with a control system, pulse signals can be received, the moving length of the corrugated pipe is calculated by counting the pulse signals, and the cutting mechanism is controlled to conduct cutting when the moving length of the corrugated pipe reaches a set value.

The utility model discloses a hard alloy matrix with a wave-shaped interface and a diamond compact, the hard alloy matrix comprises a matrix body, the top end face of the matrix body is in a circular arc shape, and wave crests and wave troughs are formed on the top end face of the matrix body; the annular reinforcing belt is arranged around the periphery of the base body; a first groove is formed in the end face of the top end of the annular reinforcing band, a second groove is formed in the end face of the top end of the base body, and the first groove and the second groove are connected to form the connecting groove. According to the utility model, the hard alloy matrix can form a staggered occlusion interface with the diamond layer through the wave crests, the wave troughs and the connecting grooves, so that impact stress can be dispersed, crack propagation can be inhibited, and circumferential binding force can be enhanced and lateral stripping of the diamond layer can be inhibited through the annular reinforcing band; the service life of the diamond compact formed by combining the hard alloy matrix and the diamond layer is remarkably prolonged under the extreme impact load, the failure mode is converted into progressive abrasion from layering, and the practical working condition applicability is improved.

The utility model provides high-efficiency filtering composite melt-blown cloth which comprises a first supporting layer and a second supporting layer which are parallel to each other, and an outer layer, a middle layer and an inner layer are sequentially arranged between the first supporting layer and the second supporting layer from outside to inside. The outer layer, the middle layer and the inner layer are all wave-shaped melt-blown cloth, the fiber diameters of the outer layer, the middle layer and the inner layer are gradually decreased, and the outer layer, the middle layer and the inner layer are provided with wave crests and wave troughs which are alternately arranged; the wave troughs of the outer layer correspond to the wave crests of the middle layer, and the wave crests of the outer layer correspond to the wave troughs of the middle layer; the wave troughs of the middle layer correspond to the wave crests of the inner layer, and the wave crests of the middle layer correspond to the wave troughs of the inner layer; the first supporting layer and the second supporting layer are of a net-shaped structure formed by fibers in a crossed mode. According to the utility model, the wave crests and the wave troughs of the outer layer, the middle layer and the inner layer are distributed in a staggered manner, so that the filtering area is increased, and the filtering efficiency is improved.

The utility model relates to the technical field of corrugated pipe machining equipment, and discloses a metal compensator forming machine which comprises a workbench, a rotary table fixedly connected to the workbench, the rotary table is electrically connected with an external master controller through a connecting line, a large gear is fixedly connected to the rotary table, and two carrying tables are symmetrically and fixedly connected to the outer side of the rotary table. A top plate is fixedly connected to the portion, located on the rear side of the rotary table, of the workbench through a plurality of supporting columns, lead screws are rotationally connected between the top plate and the carrying table, small gears are fixedly connected to the outer sides of the lead screws and are in meshed connection with the large gears, a lifting plate is movably connected between the two lead screws, and a plurality of sliding ways are formed in the lifting plate. Through cooperation of multiple assemblies of the positioner, the positioner can be flexibly matched with pipelines with different diameters, stable positioning is achieved through the action of compression springs and balls in the positioner, shaking and deviation in the machining process are avoided, the pipelines can vertically move between positioning structures, the adaptive displacement requirement during wave supporting is met, and the sizes of wave crests and wave troughs of corrugated pipes are uniform, and the wall thickness is consistent.

The embodiment of the invention discloses a fabricated composite floor slab and a design method and a manufacturing method thereof. The prefabricated assembly and the post-pouring assembly are included. According to the embodiment of the invention, the prefabricated assembly is provided with a plurality of connecting pieces on each wave trough, so that concrete poured on the wave troughs can fully wrap the connecting pieces and is firmly combined with the corrugated plate to form an integral stress structure; according to the structure, the cooperative work performance between the prefabricated assembly and the post-pouring concrete (namely the post-pouring assembly) is remarkably enhanced. And meanwhile, the ribs arranged along the wave troughs greatly improve the structural rigidity of the prefabricated assembly, and excessive flexural deformation possibly occurring in the construction stage is effectively restrained. By means of the improvement, the unsupported span allowed by construction in the hoisting and pouring process of the prefabricated assembly is remarkably increased, so that the prefabricated assembly can adapt to the construction scene with the larger span, and common temporary supports in traditional construction are omitted. Finally, on the premise that the structure safety is guaranteed, the effects of shortening the construction period and reducing the manufacturing cost are achieved.

The utility model provides an S-shaped coil spring energy storage sealing ring with constant sealing force, relates to the technical field of sealing rings, and aims to solve the technical problem of unstable sealing force of a spring energy storage sealing ring in the prior art. An S-shaped coil spring energy storage sealing ring with constant sealing force comprises an annular elastic sealing layer and an S-shaped coil spring embedded in the elastic sealing layer, and the S-shaped coil spring comprises a plurality of wave crest sections and wave trough sections which are alternately arranged. The vertical distance between the outer edge of the wave crest section and the outer surface of the elastic sealing layer is smaller than that between the outer edge of the wave trough section and the outer surface of the elastic sealing layer, and the elastic modulus of the S-shaped coil spring is larger than that of the elastic sealing layer.

The invention belongs to the technical field of low-temperature pipelines, and provides a deformation analysis method of a corrugated pipe section under the action of a low-temperature and internal-pressure combined load, which comprises the following steps: firstly, establishing a mechanical model based on structural axial symmetry, and obtaining a corrugated pipe structure and material parameters; constructing a low-temperature internal pressure deformation model based on a beam model, and simplifying the low-temperature internal pressure deformation model into three segmented deformation models of a trough, a straight plate and a crest; respectively solving each segmented model to obtain a trough active bending corner at a connecting point of the trough and the straight plate, a straight plate active bending corner at two connecting points and a crest active bending corner; and finally, determining a specific deformation mode of the corrugated pipe under the action of a low-temperature and internal-pressure combined load based on the corner calculation results. According to the method, the deformation mode of the section of the corrugated pipe under the action of the low-temperature and internal-pressure combined load can be rapidly calculated and predicted, solving is carried out based on the elastic force thermal coupling principle, and compared with an analysis method not considering a temperature item, the method is closer to the actual situation.

The present invention relates to a fan wheel (1) for a fan (2) with at least two fan blades (3) which have a wave- or tooth-like contour line (5) with projections (6) and recesses (7) on a respective blade leading edge (4). The essential aspect of the invention is that a ratio of a height A of the projections (6) to a wavelength W from one wave trough (9) to another wave trough (9) is defined as follows. A / W ≥ 1. This allows for the creation of an efficient and quiet fan wheel (1).

The invention relates to a bellows (5) for an electromechanical brake booster (1), comprising an elastically deformable base body (20) which is hollow cylindrical and extends axially, wherein the base body (20) is corrugated in longitudinal section with a plurality of wave crests (11) and wave troughs (12), wherein two mutually inclined adjacent legs (13, 14) each lead to a wave crest (11) or to a wave trough (12). It is provided that the two adjacent legs (13, 14) have different folding resistances relative to each other.

The utility model relates to an inclined bulge fin and a radiator using the same, the inclined bulge fin comprises a fin main body which is integrally formed by bending a metal plate, and the bending shape is a wave shape; the fin main body comprises a plurality of bending parts with wave crests and wave troughs, a supporting part is arranged between every two adjacent bending parts, and heat dissipation channels are formed between the adjacent supporting parts and the corresponding bending parts; a plurality of bumps are formed on the surface of the supporting part in the length direction of the supporting part, and the bumps are arranged in parallel and in an inclined mode. Through the matching design of the wave-shaped bending structures and the inclined bulges and the size design of the supporting parts and the bulges, the layout of the formed heat dissipation channels is optimized, the effect that airflow effectively passes through the heat dissipation channels is guaranteed, meanwhile, the turbulent flow effect on the airflow is greatly improved, and the heat dissipation efficiency is improved. The contact time and the contact area of the gas and the inner wall of the fin body are increased, and then the heat exchange time and the heat exchange area of a medium in a radiating pipe of the radiator and airflow are increased.

The application discloses a sand body configuration depiction method based on seismic wave trough and wave crest amplitude characteristics, which comprises the following steps: firstly, based on the existing research results of sedimentary microfacies, seven different order configuration interfaces are divided; according to single configuration unit and vertical combination sequence, eight types of configuration unit combinations are divided; based on sandstone ratio, GR curve dentification degree and physical property characteristics, the configuration unit combinations are divided into three categories; then, wave trough and wave crest seismic attribute characteristic parameters are optimized to analyze the seismic response differences of the three categories of configuration unit combinations, construct seismic response modes of different configurations, and determine the plane distribution characteristics of wave trough and wave crest ratio; the size of seismic root mean square amplitude and the size of wave trough and wave crest ratio are comprehensively considered to establish seismic identification standards of the three categories of configuration unit combinations; finally, the plane distribution prediction of the sand body configuration is completed based on the geological and seismic response characteristics. The application constructs the geological and seismic response identification standards of different configurations, and carries out quantitative prediction of the sand body configuration.

The present application relates to the technical field of detection, and discloses a polar ocean engineering structure anti-ice abrasion performance test device and test method, which comprises a rack, a detection bin with seawater is installed on the rack, a to-be-tested piece and a sea ice block are respectively installed in the detection bin, and a CCD camera with a visual sensor is installed on the detection bin. The protrusion on the turntable cooperates with the compression spring to realize the collision simulation between the sea ice block and the to-be-tested piece, restore the collision effect of the sea ice on the polar ocean engineering structure, drive the fixed frame to vertically reciprocate through the wave trough outside the turntable, and combine the sliding cooperation between the adjusting block connected with the vertical rod at the bottom of the fixed frame and the sleeve to accurately simulate the fluctuation state of the polar ocean surface, so that the continuous friction simulation between the sea ice block and the to-be-tested piece is realized. Through the simulation of the two ice abrasion scenes of collision and friction, the authenticity and reliability of the test data are greatly improved.

The invention discloses a double-sided non-equal-curvature corrugated pressure-resistant shell and a rolling forming device and method, and belongs to the technical field of deep sea equipment pressure-resistant structure design and metal plastic forming. The double-sided non-equal-curvature corrugated pressure-resistant shell comprises a corrugated shell body, the inner surface and the outer surface of the corrugated shell body are each provided with a circumferential corrugated shape, and the wave crest area is a negative Gaussian curvature shell section; the wave trough area is a positive Gaussian curvature shell section, the inner surface corrugation amplitude is larger than the outer surface corrugation amplitude, the thickness of the corrugated shell body periodically and continuously changes in the axial direction, no thickness sudden change exists, the thickness at the wave crest is the maximum value, and the thickness at the wave trough is the minimum value. The problem that the corrugated pressure-resistant shell cracks and loses efficacy before reaching the critical load can be solved, the buckling mode is improved, the buckling load is improved, and the light weight of the shell is promoted.