469 results about "Wave crest" 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 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 discloses a corrugated steel web bridge deformation monitoring temperature lag compensation method and system, and the method comprises the steps: constructing time sequence data of a corrugated steel web, the time sequence data comprises a time sequence composed of a wave crest temperature, a wave trough temperature, a strain measurement value, a wind speed and solar radiation intensity in any fold period of the corrugated steel web at any moment; according to the time sequence data, calculating the temperature lag time of the temperature to the structure response by using a sliding cross correlation coefficient algorithm of the frequency domain energy weight; time sequence data are reconstructed according to the temperature lag time, and the reconstructed time sequence data are obtained to serve as state vectors of the corrugated steel web; the state vector of the corrugated steel web is input into the strategy network of reinforcement learning, an optimal action instruction of the next step is output and obtained, and the optimal action instruction comprises the step that a compensation signal is applied to time sequence data; according to the optimal action instruction, the predicted state vector of the corrugated steel web at the next moment is obtained; and obtaining a strain prediction value of the corrugated steel web according to the state vector of the corrugated steel web at the next moment. Dynamic and high-precision compensation of the corrugated web bridge temperature hysteresis effect is achieved for the first time.

The utility model belongs to the technical field of flexible structure design, and particularly relates to a perimeter-variable fuselage frame structure which comprises sliding groove sections, sliding key sections, corrugated beams, height-variable supporting columns and length-variable supporting rods. The corrugated beams are arranged on the outer sides of the sliding key sections and the sliding groove sections and are provided with wave crest and wave trough structures; the sliding key sections and the sliding groove sections are located on the inner sides of the corrugated beams, arranged at intervals and distributed in a staggered mode. The corrugated beams, the sliding key sections and the sliding groove sections are all of arc-shaped structures, and wave crests and wave troughs of the corrugated beams are arranged in the radial direction of the arc-shaped structures; the sliding key section and the sliding groove section are mutually nested to form an arc-shaped supporting sliding way, and the wave trough of the corrugated beam slides on the arc-shaped supporting sliding way; the height-variable supporting column and the length-variable supporting rod are hinged to the two ends of the sliding key section respectively. The shape of the fuselage can be greatly changed, the large-size fuselage can provide a large space to carry more fuel, and the small-size fuselage is beneficial for reducing flight resistance and improving the fuel utilization rate.

The invention provides a composite bionic electric vehicle battery compartment with a lateral impact-resistant reinforcing structure, which is applied to the technical field of battery compartment design and comprises a bearing frame and a reinforcing flange, and the reinforcing flange comprises outer convex wave crest parts and inner concave wave trough parts which are sequentially and alternately arranged along the top outline of the bearing frame; the bearing frame comprises hollow bearing units, the bearing units are arranged in the main frame body and are sequentially and transversely arranged, and the adjacent units are connected through longitudinal reinforcing ribs; each bearing unit comprises a center part, inclined reinforcing ribs and transverse supporting ribs, the center part is of a regular hexagon structure formed by connecting six auxiliary reinforcing ribs, the upper auxiliary reinforcing rib and the lower auxiliary reinforcing rib are connected with the main frame body, the connecting ends of the left side and the right side are connected with the transverse supporting ribs respectively, and the inclined reinforcing ribs distributed in an array mode are arranged on the transverse supporting ribs; the inclined reinforcing ribs and the auxiliary reinforcing ribs at the corresponding positions are parallel and equal in length. According to the invention, the lateral impact resistance, bending resistance, torsion resistance and vibration reduction and energy absorption performance of the battery compartment are remarkably improved while the light weight is realized.

The invention discloses a reinforced photoelectric composite cable of a coal mining machine, which belongs to the technical field of cables, and comprises a composite cable core structure, an armored protective layer and a sheath system, and the armored protective layer comprises a first steel belt, a second steel belt and a metal net braid layer, a third steel belt which is continuously bent to be of a wave structure is arranged in a cavity formed by the first steel belt and the second steel belt, the wave troughs of the third steel belt make contact with the inner wall of the first steel belt, and the wave crests of the third steel belt make contact with the inner wall of the second steel belt. The cable can be subjected to multi-dimensional mechanical property collaborative optimization under complex working conditions, the purpose of graded unloading is achieved through deformation of the steel plate, the situation that a traditional structure generally depends on rigid resistance of an armor layer is not needed, the flexibility is considered while the mechanical property is guaranteed, and the cable adapts to frequent bending scenes; and the long-term stable operation of the cable in a severe mine environment is further ensured.

The invention discloses an undisturbed sleep monitoring method and a related device, and the method comprises the steps: carrying out the feature extraction of a first piezoelectric signal, obtaining a body movement feature, and enabling the first piezoelectric signal to be obtained through the superposition of a plurality of preprocessed original piezoelectric signals; frequency domain analysis is carried out on the second piezoelectric signals, frequency components corresponding to wave crests are recognized in a sleep heart rate related frequency band, a frequency pair corresponding to each moment is extracted, a frequency set is obtained, the frequency pair comprises a plurality of preorder frequency components in the first frequency sequence and the frequency of each frequency component, and the frequency set is obtained; the first frequency sequence is obtained by arranging frequency components in a descending order according to amplitude intensity; determining heart rate characteristics at each moment according to the frequency set; performing feature extraction on the acquired piezoresistive signals to obtain piezoresistive features; and determining the sleep state according to the body movement characteristics, the heart rate characteristics at each moment and the piezoresistance characteristics. The reliability and accuracy of sleep state recognition can be improved.

The invention discloses an abrasive particle monitoring method and device and electronic equipment, and belongs to the field of monitoring methods, and the method comprises the steps: collecting a to-be-detected signal based on each probe in an electrostatic sensor; performing variational mode decomposition processing on the to-be-detected signal to obtain a target eigenmode function corresponding to the to-be-detected signal; performing sparse representation based on the target eigenmode function to obtain a target signal corresponding to the to-be-detected signal; performing dynamic time warping on each group of target delay signals by using a sliding window to obtain similarity results respectively corresponding to each group of target delay signals; and if a wave crest meeting a preset condition exists in the sequence diagram presented by the similarity result, determining the number of the abrasive particles according to the wave crest, and obtaining an abrasive particle monitoring result. Through the method, the abrasive particle trigger signal is effectively extracted, the interference of abnormal pulses on abrasive particle identification is reduced, and the accuracy of abrasive particle identification is improved.

The invention relates to the technical field of heat exchangers, and discloses a high-heat-exchange-efficiency micro-channel heat exchanger for rail transit, which comprises two symmetrically arranged collecting pipes, a plurality of porous flat pipes and fins are arranged between the two collecting pipes, and bottom plates are arranged on the outermost sides of all the porous flat pipes and the fins. The bottom plate is fixedly installed on the collecting pipe, side plates are further fixed to the end faces of the two sides of each porous flat pipe, and buckle main components are movably arranged in the side plates. The fins are arranged in a corrugated mode, a sliding block is fixed to each wave crest and each wave trough, and a buckle pair component is arranged in each sliding block. The limiting clamping plates are buckled to the side plates, so that the porous flat pipes and the fins are fixedly connected, the problem that welding fixation cannot be disassembled is solved, replacement can be completed only by disassembling the corresponding porous flat pipes or fins during replacement, and the situation that the whole heat exchanger needs to be replaced during replacement due to welding fixation at present is avoided; and the cost is greatly increased.

The invention provides a single cell structure of a fuel cell and an integrated packaging method thereof, the single cell structure of the fuel cell sequentially comprises an anode plate, one side of the anode plate deviating from a membrane electrode, namely the upper surface of the anode plate, is integrally injected with glue to form a water field sealing element, and the water field sealing element is wave-shaped and comprises a plurality of wave crests and wave troughs which are arranged in sequence; a membrane electrode and a cathode plate; and the adjacent single battery structures are connected through water field sealing pieces. The anode plate, the membrane electrode and the cathode plate respectively comprise a plurality of frames, so that the three layers of polar plates are respectively divided into a plurality of groups of chambers. The waved continuous structure of the water field sealing element provides a longer anti-leakage barrier for the cooling liquid. And the assembly pressing force is uniformly distributed at each contact point at the wave crest, so that the excessive compression of the water field sealing element and the deformation of the polar plate caused by local stress concentration are avoided, and the long-term sealing property is ensured. The multiple groups of chambers share the hydrogen inlet and the air inlet, so that the isolation space required for additionally arranging the inlets can be reduced, and the space of a power generation area is increased.

The invention relates to the technical field of image recognition, in particular to a bridge cable protection layer damage recognition method and system based on machine vision, and the method comprises the steps: extracting a region of interest based on the edge information in a cable protection layer image, obtaining a gray histogram, and carrying out the recognition of the damage of a bridge cable protection layer through the gray value level of a wave crest in the gray histogram; determining a distinguishing value of pixel points in the region of interest; calculating a pixel mutation index of the pixel point by using the gray level change condition of any pixel point in the region of interest in different directions in the local range and combining the distinguishing value of the pixel point; calculating the characteristic value of the pixel point by combining the pixel mutation index of the pixel point and the gray level characteristic in each direction in the local range corresponding to the pixel point; and carrying out damage area identification by utilizing the characteristic values of all the pixel points in the region of interest and combining a machine learning algorithm. According to the invention, the damage identification accuracy of the bridge cable protection layer is effectively improved.

The invention relates to the technical field of defect identification, in particular to a braided tube appearance defect detection method and system based on machine vision, and the method comprises the following steps: obtaining an image to generate a brightness fracture region, calculating a peak difference to generate a structure abnormal region, extracting a light spot path to identify a burr abnormal region, and analyzing a grid texture to generate a deformation identification region. And a defect identification scheme is obtained by combining gray scale and jump. According to the method, a brightness fracture area is extracted through gray difference symbol change, segmentation of image jump features is realized, a structure dislocation area is positioned through symmetrical wave crest difference, a form mutation zone is revealed through light spot extension and edge consistency comparison, and burr identification stability is improved. Local trend abnormity is judged through texture length and cross frequency quantification, and a multi-dimensional standard is constructed by combining gray span and disturbance frequency screening, so that defect features are clearly presented in a detail level, and the recognition precision and stability in a complex surface environment are ensured.

The invention relates to the technical field of navigation and positioning, in particular to a pedestrian dead reckoning optimization method based on improved wave crest detection and CNN-LSTM, comprising the following steps: S1, data acquisition: acquiring pedestrian motion sensor data including acceleration, angular velocity and magnetic field intensity through an accelerometer, a gyroscope and a magnetometer; s2, on the basis of an improved wave crest detection algorithm, real-time monitoring and analysis are carried out on the acceleration signal by setting a dynamic threshold value, and an effective gait cycle is extracted; s3, extracting reference features of the step length from the pedestrian motion sensor data, training a step length prediction model of the CNN-LSTM network, and optimizing the step length prediction model; and S4, obtaining a pedestrian course angle based on quaternion attitude calculation, realizing gait cycle segmentation and step length prediction in combination with an improved wave crest detection algorithm and a CNN-LSTM model, and finally calculating the position of the pedestrian at the next moment through the course angle and the step length so as to complete continuous navigation positioning. The method can achieve the dynamic extraction and fusion of the spatial-temporal features of multiple sensors, improves the gait detection robustness and step length estimation precision in a complex scene, remarkably optimizes the overall positioning performance of a PDR, and solves a problem that the positioning precision is reduced because a signal is affected by sensor noise, behavior diversity and the like.

The invention relates to the technical field of spectral analysis, in particular to a disperse dye component spectral analysis and identification system based on trace detection, which comprises a wave band interception module, a perturbation extraction module, a spectrum curve identification turning point recording fluctuation direction and a continuous extraction main peak core area expansion two-side generation analysis area, a phase shifting module is used for analyzing a curve fragment lifting relation and a turning sequence to generate a trajectory diagram; and a dye locking module is used for extracting a dye component with the highest matching degree by matching trajectory features to generate a candidate set. According to the method, a core peak area is locked through the fluctuation direction and continuity of a curve turning point, secondary wave crests are discriminated through an adjacent slowly-changing section, a disturbance sequence is formed by combining a mass center offset ratio and curvature connection, a curve fragment lifting relation and a turning sequence are analyzed to generate track mapping, and dye components are screened through track arrangement and offset symmetric matching. And the frequency distribution interval continuity and peak value overlapping verification ensure reliable identification.

The invention belongs to the technical field of piezoelectric ultrasonic motors, and particularly relates to a piezoelectric micro motor stator and rotor structure and a micro piezoelectric motor module. According to the technical scheme, the stator and rotor structure of the piezoelectric micro motor comprises a stator and a rotor, and the stator comprises a steel plate, a piezoelectric film arranged on the steel plate and a plurality of electrodes arranged on the piezoelectric film along the circumference; after alternating current driving voltage is loaded on the electrodes, traveling waves in circumferential transmission are excited on the stator, the traveling waves on the stator are provided with at least one wave crest, permanent magnets with the same number as the wave crests of the traveling waves are fixed on the rotor, and magnetic attraction exists between the steel plates and the permanent magnets. The invention provides a piezoelectric micro motor stator and rotor structure and a micro piezoelectric motor module. A piezoelectric ceramic film driven by low voltage is used as a transduction element, coupling is carried out through magnetic attraction force, low-voltage driving is achieved, meanwhile, the thickness of the ultrasonic micro motor is thin enough, and support is provided for applications such as an embedded terminal; magnetic attraction force is used as coupling driving force, frictional wear between the stator and the rotor is avoided, and the service life of the ultrasonic motor is prolonged.

The invention discloses a normal-temperature and high-temperature integrated testing device for the resistance value of a thermistor in the wave crest axial direction, and the device comprises a normal-temperature testing module which comprises a feeding mechanism, a first straightening mechanism, a normal-temperature testing mechanism and a conversion belt material wheel which are sequentially disposed on a first rack in the conveying direction of the thermistor; the high-temperature testing module comprises a second rack, a second straightening mechanism, a high-temperature testing mechanism and a classified material receiving mechanism, and the second straightening mechanism, the high-temperature testing mechanism and the classified material receiving mechanism are sequentially arranged in the conveying direction of the thermistors on the second rack; wherein the normal-temperature testing mechanism comprises a normal-temperature oil groove and a normal-temperature testing wheel, and a first cover plate corresponding to the normal-temperature oil groove in position is arranged on the working table of the first rack. Compared with the prior art, the problem that resistance testing of a large number of wave crest axial thermistors at the normal temperature and the high temperature cannot be rapidly achieved through existing equipment is solved.

The invention discloses a waterproof photovoltaic support for a color steel tile roof, and relates to the technical field of photovoltaic systems. The waterproof device comprises a plurality of waterproof bases linearly installed at a plurality of wave crests of the color steel tile, each waterproof base comprises a plurality of bases, a waterproof cover plate, a plurality of connectors and a set of end covers, the bases are installed at the wave crests of the color steel tile through fasteners, and the connectors are fixed to the tops of the two bases through bolts correspondingly; and the waterproof cover plate is fixed between the plurality of bases and the plurality of joints and covers the wave crest area of the color steel tile. The novel waterproof bases are designed, discrete and point-shaped distributed miniature bases are innovatively adopted, each base is only composed of two small bases, a thin-wall waterproof cover plate, two end covers and a connector, and compared with a free rail covering the whole support path, materials are saved to the maximum extent; and the cost of the base part is directly and remarkably reduced, and great economic attraction is achieved for large-scale application.

The application provides a bending deformation pipe section identification method and device, electronic equipment and storage medium. The method comprises the following steps: obtaining first strain data measured by an inertial measurement unit (IMU); obtaining a bending strain curve according to the first strain data; determining a wave crest in the bending strain curve, wherein the bending strain value of the wave crest is greater than a preset value; obtaining a to-be-identified pipe section, wherein the to-be-identified pipe section is a pipe section corresponding to a preset interval on both sides of the wave crest in a pipeline; inputting second strain data corresponding to the to-be-identified pipe section into a pipe section type identification model to obtain a pipe section abnormal type of the to-be-identified pipe section. According to the method, the to-be-identified pipe section is determined according to the obtained first strain data, and the second strain data corresponding to the to-be-identified pipe section is input into the pipe section type identification model, so that the pipe section abnormal type of the to-be-identified pipe section can be obtained. The judgment of the pipe section abnormal type does not need to be manually performed, time and manpower can be saved, a unified judgment standard is provided, and the judgment efficiency of the pipe section abnormal type is improved.

Double-walled plastic corrugated pipe, wherein the double-walled plastic corrugated pipe comprises an inner wall and an outer wall, characterized in that the double-walled plastic corrugated pipe has a main pipe section, wherein a transition pipe section is connected to each of the two ends of the main pipe section and a solid-wall pipe section is connected to the outer end of each transition pipe section, wherein in the main pipe section the wave crest height of the outer wall is constant, the wave spacing is constant and the outer wall thickness is constant, and in the direction from the main pipe section to the solid-wall pipe section in the transition pipe section the wave crest height of the outer wall gradually decreases, the wave spacing gradually decreases and the outer wall thickness gradually increases.

The invention relates to the technical field of magnetic element manufacturing, in particular to an automatic spot spraying selective welding system and method for magnetic element customized parts, the system comprises a feeding conveying belt, a collaborative robot, a scaling powder spraying device, a selective wave soldering device and a discharging device, and the method comprises the steps that S1, the feeding conveying belt conveys products to a feeding position; s2, the collaborative robot moves to a feeding position to clamp a product, then the product is moved to the position above a quantitative injection valve, and scaling powder is sprayed to a welding point position; s3, a camera collects tin wave images in real time and transmits the tin wave images to a controller, and the controller detects that tin waves are qualified; s4, the collaborative robot moves the product to the position above the tin wave to preheat the scaling powder, and then the welding point position is aligned with the nozzle and makes contact with the tin wave to complete welding; and S5, the product is moved to a discharging positioning tool. The problem that traditional fixed station equipment is difficult to adapt to the production requirements of multi-variety and small-batch customized parts is solved, and the stability of tin waves is monitored in real time through machine vision in the welding process.

The invention discloses a dual-wavelength frequency doubling regulation and control method based on a PPLN waveguide, and relates to the technical field of nonlinear optics. The method comprises the following steps: constructing a PPLN waveguide model, and determining a fundamental frequency light mode and a frequency doubling light mode; calculating effective refractive indexes of the fundamental frequency light and the frequency doubling light at respective wavelengths; the polarization period is calculated according to the effective refractive index, any target polarization period is fixed, the target polarization period is configured to correspond to two different working wavelengths at the same time, and therefore dual-wavelength frequency doubling light with a specific wave crest interval is generated at the output end of the waveguide; the wave crest interval is regulated and controlled by selecting different polarization periods; according to the invention, dynamic control of dual-wavelength frequency multiplication output is realized by changing the size of a polarization period; the single waveguide can complete various optical function design ideas, and has certain value for research in related fields such as multi-wavelength lasers and wavelength multiplexing communication.

The utility model discloses an embodiment provides a kind of roof opening node system and metal roof.Metal roof includes roof surface, multiple wave crests are arranged at interval on roof surface, and roof surface has opening, and there is spacing between wave crest and opening, and roof opening node system is surrounded in the hole circumferential side.Roof opening node system includes mutually overlapped and spliced first batten and second batten, first batten and second batten are oppositely located at spacing, and the side of first batten and second batten mutually away from and the bottom edge of corresponding side wave crest are flush. That is, the position of first batten and second batten corresponds to the position of wave crest, and just because it is provided with mutually overlapped and spliced first batten and second batten, so that the roof surface of hole periphery is all flat, and will not be affected by wave crest, so that better sealing can be carried out, structure is simple and need not introduce too much material, cost is low, easy to operate.

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 provides a patterning method and a semiconductor device. The patterning method comprises the following steps: providing a lithium niobate layer; a first etching process is executed, the lithium niobate layer is patterned so that an initial groove can be formed in the lithium niobate layer, and at least partial area of the inner side wall of the initial groove is provided with an undulating surface profile; the surface profile has wave crests and wave troughs; a barrier layer is formed, the barrier layer covers the inner side wall of the initial groove, and the material of the barrier layer is different from that of the lithium niobate layer; executing a second etching process, and at least removing wave crests of the barrier layer and the lithium niobate layer to form a groove; the roughness of the inner side wall of the groove is sub-nanometer level, and the inner side wall of the groove is perpendicular to the lithium niobate layer; when the second etching process is executed, the etching rate of the barrier layer is smaller than that of the lithium niobate layer. According to the invention, the perpendicularity and the surface roughness of the etched side wall are balanced at the same time.

This invention relates to the field of information security technology, specifically to a blockchain-based anti-tampering system for marine environmental data. The system includes a wave crest localization module, a waveform feature extraction module, a fingerprint generation module, a tag mapping module, and an on-chain storage module. In this invention, deep analysis of seawater multispectral light intensity waveform data is performed to extract wave crest curvature geometric indices and wavelength differences, constructing a set of morphological parameters. Component coupling weights are used to generate an on-chain fingerprint sequence reflecting the constraints of water quality components. Dynamic state tags are generated by mapping instantaneous flow velocity to tidal cycle flow velocity ranges. The fingerprint sequence and dynamic tags are encapsulated into blocks and subjected to fluid dynamic continuity verification. A distributed ledger consensus mechanism is used to lock the physical temporal relationship of the data, realizing a transformation from simple numerical recording to multi-dimensional logical verification of environmental characteristics, effectively avoiding the tampering risks associated with centralized storage.

The invention discloses a mutual inductor secondary circuit defect identification method and apparatus, a terminal device and a storage medium. The method comprises the steps of obtaining a secondary voltage waveform signal of a to-be-identified mutual inductor; performing Fourier transform according to the secondary voltage waveform signal to obtain a fundamental component and a harmonic component; judging whether a harmonic amplitude condition is met or not according to the harmonic component to obtain a first judgment result; according to the secondary voltage waveform signal, determining a corresponding waveform zero point and a wave crest; according to the secondary voltage waveform signal and the waveform zero point, judging whether a waveform abnormal condition is met or not, and obtaining a second judgment result; judging whether a fundamental wave amplitude condition is met or not according to the wave crest and the fundamental wave component to obtain a third judgment result; and obtaining a secondary circuit defect identification result of the mutual inductor to be identified according to the first judgment result, the second judgment result and the third judgment result. According to the invention, the monitoring efficiency of the power system is improved.

The utility model discloses a high-strength compression-resistant cable, which belongs to the technical field of cables and comprises a cable core unit, a filling layer is arranged outside the cable core unit, an aramid yarn braid layer is arranged outside the filling layer, an inner sheath is extruded outside the aramid yarn braid layer, a wrapping tape is wrapped outside the inner sheath, an inner lining layer is arranged outside the wrapping tape, and an outer lining layer is arranged outside the inner lining layer. An inner sheath is arranged outside the inner sheath, an armor layer is arranged outside the inner lining layer, an outer sheath is arranged outside the armor layer, the outer surface of the inner sheath is a concave-convex surface with wave crests and wave troughs, a wrapping tape is tightly wound on the wave crests of the inner sheath, and a buffer cavity is formed between the wrapping tape and the inner sheath. According to the high-strength compression-resistant cable, the wrapping tape is wrapped outside the inner sheath, so that a buffer cavity can be naturally formed between the inner sheath and the wrapping tape, the compression-resistant effect of the cable can be realized without installing a complex structure such as a spring in the cable, and the high-strength compression-resistant cable is easy and convenient to use and convenient to implement.

The invention discloses an anti-bubble automobile body floor damping fin, and belongs to the technical field of automobile NVH (Noise Vibration and Harshness). At least one surface of the damping fin is provided with periodically arranged corrugated structures (H = 0.5-3 mm, lambda = 8-50 mm), and the crests of the corrugated structures are provided with micropores (the aperture is 50-150 microns). According to the composite structure, during baking, a groove channel for directional flow guiding is formed between the damping fin and the automobile body steel plate, and an efficient and synergistic three-dimensional exhaust network is constructed by combining the micropores for vertical pressure relief at the wave crests. By means of the design, internal volatile matter can be actively guided and promoted to rapidly escape in the baking process, and generation of bubbles is fundamentally and effectively restrained. The damping fin is ingenious in structural design and remarkable in effect, does not depend on a specific material formula of the damping fin, and has wide applicability and excellent industrialization prospects.

The application belongs to the field of physical property measurement, and discloses a kind of electroplating additive concentration online detection method and system based on multispectral fusion, comprising: guiding flow electroplating liquid through detection cell, control transducer array generates sub-cavitation megahertz standing wave field, utilize acoustic radiation force to drive free gas bubble to gather to wave crest area, make node area form the light path of no scattering interference;Real-time monitoring impedance phase, when reaching resonance extreme point, produce synchronous trigger signal, drive light source to emit ultraviolet wave band light beam, visible wave band light beam and near infrared wave band light beam to light path;Extract the intensity correction absorption brightness parameter of main salt reference wavelength, obtain response sequence and output additive concentration, the application reconstructs the phase distribution of measurement environment, blocks random scattering to the erosion of spectral information, ensures the fidelity of measurement data corresponding to physical fact, solves the problem that trace component signal is hidden in complex matrix.

The invention relates to the technical field of tartary buckwheat product production, and discloses an efficient grader for a tartary buckwheat production line, which comprises an impurity removal bin, and flexible filter cloth is mounted in the impurity removal bin; the adjusting screening assembly is arranged on the inner side of the impurity removing bin and comprises symmetrically-arranged guide rails, a plurality of screening shafts independently rotating are arranged on the two guide rails in an equally-spaced and sliding mode, the distance between the screening shafts is adjusted in an equally-spaced mode, the screening shafts are each provided with a set of top cylinders, and sliding top heads are arranged on the inner sides of the top cylinders in a sealed and sliding mode. The inclination angles of the flexible filter cloth in multiple directions and the wave crest amplitude in the length direction of the guide rail are changed by independently adjusting the lengths of the sliding top heads extending out of the top cylinder, and the wave crest period of the flexible filter cloth in the length direction of the guide rail is changed by equidistantly adjusting the distances among the multiple groups of sliding top heads; the distance between the multiple sets of sliding top heads and the extending length of each sliding top head are adjusted to adapt to different shapes of the flexible filter cloth, so that large impurities such as straw with different contents and properties are efficiently separated, and it is guaranteed that graded tartary buckwheat has high purity.