257 results about "Wave trough" patented technology

The invention relates to the technical field of tumble prediction, in particular to a tumor patient tumble prediction system based on machine learning, which comprises a stride frequency recognition module, a physiological fluctuation monitoring module, a gait coupling judgment module, a posture analysis module and a risk output regulation and control module. According to the method, by accurately positioning the wave crests and the wave troughs in the acceleration signal period and analyzing the frequency change direction of the adjacent sections, accurate marking of the mutation sections is achieved, the sensitive capture capacity of behavior state changes is effectively improved, and the synchronous extraction mode of the mutation sections and the physiological signals is improved. Through consistency comparison of attitude angle change and gravity center track direction, accuracy of motion structure abnormity and imbalance state identification is enhanced, pressure distribution and spine compression direction are extracted, corresponding pairing between structure pressure and physiological load is realized, optimization of time sequence integrity is realized, and accuracy of motion structure abnormity and imbalance state identification is improved. And multi-dimensional data fusion analysis has high pertinence and stability.

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 provides an aviation nacelle part waviness automatic detection and evaluation method, and belongs to the field of product production detection, and the method comprises the steps: carrying out the protocol scanning of part surface contour features, and obtaining the undistorted coordinate point discrete point cloud data of the actual surface contour; filtering the point cloud data; obtaining a piece of flattened deviation value discrete point cloud data; obtaining a flattened deviation value continuous curve by adopting a general standard curve reduction method; extracting waviness components, and obtaining a curve center line; obtaining a crest value and a trough value participating in calculation; and calculating the maximum wave amplitude, the waviness and the slope for evaluating the waviness by using the wave peak value and the wave trough value. According to the method, the relation between the minimum cut-off wavelength of the waviness and the sampling interval is stipulated, the undistorted reduction of the surface profile curve is ensured, the influence of non-waviness profile components in the digital evaluation of the waviness is eliminated through a combined calculation method, and the evaluation accuracy of the waviness of the aviation nacelle part is improved.

The invention belongs to the technical field of spectral analysis, and particularly discloses a Raman spectrum baseline correction method, device and system, a medium and equipment, and the method comprises the steps: obtaining a to-be-processed original Raman spectrum, recognizing trough points of the original Raman spectrum, and screening the recognized trough points to obtain baseline trough points; fitting the base line wave trough points to obtain a Raman spectrum base line; and correcting the Raman spectrum baseline to obtain a corrected Raman spectrum. Through multi-stage trough point screening and adaptive fitting, background interference can be effectively eliminated, and the signal-to-noise ratio and the characteristic peak fidelity of the Raman spectrum can be improved.

The invention relates to an ultrahigh-temperature-resistant radio-frequency coaxial cable and a manufacturing method thereof. The cable comprises an inner conductor, an insulating foaming layer, a first outer conductor, a glass fiber belt, a silicon dioxide aerogel coating, a second outer conductor, a flame-retardant fireproof layer and a flame-retardant sheath layer which are sequentially arranged from inside to outside, wherein the first outer conductor is provided with a first embossing structure comprising wave crests and wave troughs; the second outer conductor is provided with a second embossing structure comprising wave crests and wave troughs; the positions of wave crests and wave troughs of the first embossed structure are consistent with the positions of corresponding wave crests and wave troughs of the second embossed structure, and air layers are formed between the first embossed structure and the glass fiber belt and between the second embossed structure and the silicon dioxide aerogel coating. According to the invention, the safety and reliability of the cable in extreme environments such as fire disasters and the like are remarkably improved, and communication interruption of the radio frequency coaxial cable in high-temperature environments of fire disasters is avoided.

The utility model provides a dust cover, drive subassembly and vehicle, dust cover includes cover body, major diameter end connecting edge and minor diameter end connecting edge, major diameter end connecting edge and minor diameter end connecting edge are respectively connected to the both ends of cover body, the cover body along the axial direction includes a plurality of wave crest structure and wave trough structure that alternate connection in proper order, the wave crest structure is provided with a large-diameter end wave crest face facing the large-diameter end connecting edge and a small-diameter end wave crest face facing the small-diameter end connecting edge, and at least one of the large-diameter end wave crest face and the small-diameter end wave crest face is provided with a drainage groove. The drainage grooves extend from the positions close to the trough structures to the positions away from the trough structures. According to the dustproof cover, the contact area and the water amount between the two adjacent wave crest structures are reduced, so that the siphonic effect and the stick-slip effect between the two adjacent wave crest structures are reduced, and the periodic abnormal sound of a vehicle in the large-angle steering process is relieved or eliminated.

The invention discloses a soil wind erosion treatment device which comprises a wavy grid structure, and the wavy grid structure is of a wavy three-dimensional structure formed by plastic sheets and is composed of a plurality of wave crest parts, a plurality of wave trough parts and grid units evenly distributed between the wave crest parts and the wave trough parts. A biomass rope is wound on the outer side of the trough part; the whole wavy grid structure is made of a plastic material with heat conductivity and an electrostatic adsorption function; the wave-shaped grid structure is fixed to the ground through anchoring inhaul cables. The whole soil wind erosion treatment device can be laid in a modularized mode, the wave crest arrangement direction and the anchoring point density are optimized according to the wind erosion terrain and the wind direction, and the soil wind erosion treatment device is suitable for wind erosion sensitive areas in arid and semi-arid areas. In practical application, the device can effectively relieve direct scouring of strong wind to surface sand grains, meanwhile, condensation, water catchment and sand stabilization are induced through the structure of the device, the ecological vegetation restoration process is gradually introduced, and the device has the ecological property and engineering property.

The embodiment of the invention provides a sea wave height determination method and device, a storage medium and electronic equipment, and the method comprises the steps: segmenting target point cloud data into a plurality of time sequence frames, and determining a wave crest region and a wave trough region of sea waves according to a local extreme point in the target point cloud data, each time sequence frame is used for indicating the sea surface shape at each moment; according to the wave crest area, the wave trough area and the multiple time sequence frames, a target sea wave contour model is fitted, and the target sea wave contour model is used for indicating the sea wave height and the three-dimensional shape of the sea wave at each time point; and determining the sea wave height at any time point based on the target sea wave contour model. According to the method, the problem that high-precision sea wave height data cannot be provided under complex sea conditions such as high storm waves and changeable tides in the prior art can be solved.

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 belongs to the technical field of green buildings, and particularly relates to a passive energy-saving building facade sine wave flow guide outer envelope system which comprises an outer facade assembly, the outer facade assembly comprises sine wave flow guide mechanisms and an outer curtain wall which are alternately arranged from top to bottom, and each sine wave flow guide mechanism is of a wavy ridge structure and internally provided with a containing cavity; the wind turbine generator is mounted in the accommodating cavity; wherein the wave trough of the upper top surface and / or the wave crest of the lower bottom surface of the sine wave diversion mechanism are / is provided with a gas collection port, and the outer surface is provided with a vent hole. The device can gather, guide and discharge a natural wind field, improves the capturing efficiency of wind energy, can adapt to airflow in different directions, enables a wind turbine generator to be installed in a hidden mode, does not affect the building facade effect, can be flexibly arranged, can adapt to complex and changeable wind direction conditions, improves the stability and reliability of wind energy utilization, and is suitable for popularization and application. And airflow power can be continuously generated in windless weather, the problem of insufficient wind power is effectively solved, and continuity and stability of building energy supply are ensured.

The present invention relates to the field of filter technology and provides a filter for an automotive air conditioning system. The filter comprises a frame and a filter cloth, the filter cloth being disposed within the frame and having an outer surface comprising an air inlet surface and an air outlet surface connected thereto. The air inlet surface is pleated and includes a plurality of wave crests and a plurality of wave troughs, the plurality of wave crests and a plurality of wave troughs being connected and arranged alternately. Along the arrangement direction of the wave crests and troughs, the apex of adjacent wave crests and the base of adjacent wave troughs can be brought closer or further apart, thereby causing the air inlet surface to fold or unfold accordingly. The present invention enables the filter cloth to be adaptively adjusted according to the actual density of impurities, thereby improving the adaptability of the automotive air conditioning filter.

The invention discloses an aircraft surface waviness measurement and analysis method and system, and the method comprises the steps: scanning the surface of an aircraft according to a planned path through employing a three-coordinate measuring machine and a scanning probe, obtaining scanning data, and obtaining the scanning data for evaluation through employing a segmented scanning and segment-to-segment direct splicing mode for a hole, a pin and other structural parts; fitting based on scanning data to obtain a point deviation data set, calculating corresponding point arc length data based on the point deviation data and the point coordinate data on this basis, and drawing a graph by taking a horizontal axis as the point arc length data and a longitudinal axis as the point deviation data; and determining the surface waviness of the airplane by combining the derivative at the intersection point of the point deviation data curve and the transverse axis and the distance between the wave crest and the wave trough, thereby realizing the efficient and accurate measurement of cavities, welding seams and other obstacle structures on the outer surface of a large-scale airplane part or the whole machine and the accurate calculation of the waviness.

The present application relates to the technical field of oil reservoir exploration, and particularly relates to a fracture-cave seismic facies identification method and device, which comprises the following steps: obtaining each reservoir section range of a fracture-cave reservoir; obtaining the seismic reflection energy intensity of each reservoir section of the fracture-cave reservoir; obtaining the seismic waveform characteristics of each reservoir section, wherein the seismic waveform characteristics are any one of the following: a first type of seismic waveform with both wave peaks and wave troughs, and a second type of seismic waveform with only wave peaks or only wave troughs; determining the seismic facies category of each reservoir section of the fracture-cave reservoir based on the seismic waveform characteristics and the seismic reflection energy intensity, thereby providing an important basis for the exploration and development of the carbonate rock fracture-cave oil reservoir through effective identification of the seismic facies.

The invention belongs to the technical field of net mold frames for hollow internal mold metal net cement partition walls, and discloses a net mold frame for a hollow internal mold metal net cement partition wall and a method for building the hollow internal mold metal net cement partition wall. The main technical characteristics are as follows: two opposite wave-shaped meshes are included, wave troughs of the two meshes are attached together, wave crests of the two meshes are opposite, a cavity is formed between the wave crests of the two meshes, vertical keels are arranged in the cavity, the vertical keels are bound and fixed with the meshes, and the vertical keels are arranged in the cavity. Vertical supporting frames are arranged at the wave trough positions of the two meshes, and the vertical supporting frames are fixed to the meshes. The upper embedded steel bars and the lower embedded steel bars are connected together through the vertical supporting frames, the vertical supporting frames are arranged at intervals, and the anti-collision performance and the anti-seismic performance of the wall are greatly improved.

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 present invention discloses a deep hole rifling depth detection method, comprising the following steps: Step 1: Acquiring measurement data: 11) Installing a spectral confocal displacement sensor on a mounting shaft parallel to the axis of a pipe to be tested, so that the spectral confocal displacement sensor is extended into a set position of the pipe to be tested, and then keeping the spectral confocal displacement sensor stationary and the axial speed of the pipe to be tested zero; 12) Driving the pipe to be tested to rotate around the mounting shaft at a uniform speed for one circle. During the rotation of the pipe to be tested, the spectral confocal displacement sensor is used to measure the inner wall of the pipe to be tested, and a curve reflecting the change of the distance between the inner wall of the pipe to be tested and the spectral confocal displacement sensor over time is obtained; Step 2: Acquiring the rifling depth: Fitting all wave crest segments into a first sine curve, and fitting all wave trough segments into a second sine curve, then the rifling depth is obtained: #imgabs0#, #imgabs1# and #imgabs2# respectively represent the offset distances of the first sine curve and the second sine curve.

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 relates to a reservoir identification method, and belongs to the technical field of oil-gas exploration and development. And determining the reservoir development condition of the target stratum by using the seismic data, the logging data and the gas testing data of the target stratum. Based on the reservoir development condition of the target stratum, wave crest and wave trough positions of the target stratum are determined through well seismic calibration and forward modeling, and structural interpretation is conducted on the wave crest and wave trough positions of the target stratum. And determining the seismic reflection characteristics of the reservoir by using a structural interpretation result, a multi-well synthetic record and a forward modeling result. Subtracting the wave trough horizon from the obtained wave crest horizon of the target layer to obtain a wave trough-to-wave crest interval time plane graph, and utilizing the interval time plane graph to construct a high-timeliness deposition interface. And recognizing the reservoir according to the determined seismic reflection characteristics of the reservoir and the constructed high-temporal sedimentary interface. According to the method, the problems that the improvement of the seismic data resolution is limited and the identification result is easily interfered by the seismic event time penetration, so that the reservoir identification precision is relatively low are effectively solved.

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 a corrugated pipe-shaped soft body actuator and a hand rehabilitation training device. The actuator comprises a hollow corrugated pipe section; the first connector pipe section is connected with one end of the hollow corrugated pipe section; the wave height of the hollow corrugated pipe section has the maximum value and the minimum value in the circumferential direction, and the maximum value is larger than the minimum value. The projections of the outer contour of the wave crest structure and the outer contour of the wave trough structure of the hollow corrugated pipe section in the axial direction are two closed curves which are eccentrically arranged; the axial section where the wave height maximum value of the hollow corrugated pipe section is located is not coplanar with the axial section where the wave height minimum value of the hollow corrugated pipe section is located. The corrugated-pipe-shaped soft body actuator can achieve combination of telescopic deformation and bending deformation of the actuator under the unconstrained condition, and when the corrugated-pipe-shaped soft body actuator is used as a hand rehabilitation training device, interphalangeal unfolding and finger bending and straightening can be combined.

The utility model provides a slide seat with oil guide groove structures, the slide seat is arranged on a lower template and can slide back and forth on the lower template in a reciprocating manner, a plurality of oil guide groove structures are concavely arranged on the contact surface of the slide seat and the lower template, and the oil guide groove structures are used for accommodating lubricating oil. Each oil guide groove structure is provided with a first oil guide groove and two second oil guide grooves communicated with the first oil guide groove, the multiple first oil guide grooves are distributed in the contact surface in parallel, the first oil guide grooves are linear and extend in the front-back direction, and the second oil guide grooves are wavy; the two second oil guide grooves are arranged in a mirroring mode with the first oil guide groove communicating with the second oil guide grooves as the center, each second oil guide groove is provided with a wave crest end and a wave trough end, the wave crest ends are arranged away from the first oil guide grooves, and the wave trough ends communicate with the first oil guide grooves. The utility model further provides a die.

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 present invention belongs to the field of advanced structural design and manufacturing technology, and specifically relates to a high-rigidity hollow sandwich structure and a manufacturing method. The method first analyzes the stress and deformation of the hollow sandwich structure to determine the maximum deformation point and the fixed constraint end. Based on these points, the curve profile of the rib is designed so that the wave crest is close to or passes through the maximum deformation point, and the wave trough is close to the fixed constraint end. Then, an isolation agent is applied to the area outside the curve profile of the rib. After that, the thin plate blank and the solid blank are stacked in sequence, placed in a high-temperature environment, and isostatic pressure is applied to perform diffusion connection to make the blanks become one. Finally, an inert gas is introduced at high temperature, and superplastic forming technology is used to complete the manufacture of the high-rigidity hollow sandwich structure. Through this "S-shaped" or "zigzag" rib design, the structural rigidity is improved while ensuring the accessibility of the process.

The utility model relates to the technical field of packing, in particular to a corrugated packing combined structure for a water scrubber. The corrugated packing combined structure is formed by stacking or coiling corrugated packing, each corrugated packing comprises a wave crest, a wave trough and a wave surface, a hook-shaped structure is arranged on each wave surface, and the surface, with the largest surface area, of each hook-shaped structure is connected with the corresponding wave surface. The corrugated packing composite structure is small in gap, better in gas-liquid ratio uniformity during water spraying, not prone to displacement in the installation process and the use process, good in stability and longer in service life.

The utility model discloses a circular-truncated-cone-shaped bonding point oblique folded wave cross-flow type cooling tower packing sheet which comprises a water inlet unit, a water outlet unit, an air inlet unit, an air outlet unit and a flow channel unit, and the water inlet unit and the water outlet unit are arranged on the upper side and the lower side of the cooling tower packing sheet respectively. The air inlet unit and the air outlet unit are arranged on the left side and the right side of the cooling tower packing piece respectively, the flow channel units are a plurality of oblique folded wave hysteresis wave grooves which are sequentially arranged, the direction of each section of flow channel of each hysteresis wave groove is obliquely downward, and each flow channel unit comprises an oblique folded wave peak flow channel unit and an oblique folded wave valley flow channel unit which are sequentially and transversely arranged in a penetrating mode from top to bottom. The oblique folding wave peak flow channel unit and the oblique folding wave valley flow channel unit are connected with the air inlet unit and the air outlet unit on the two sides; and a circular-truncated-cone-shaped bonding point structure is further arranged on the runner unit. The cooling surface area in unit volume is increased, so that the contact surface area of the water film and the filler is further increased, the water film discharge speed is reduced, the heat and mass transfer time is prolonged, and the cooling effect is improved.