44results about How to "The data processing method is simple" patented technology

The invention discloses an online monitoring method for degradation of an insulated gate bipolar transistor (IGBT). The online monitoring method can be used for monitoring the degradation degree of the IGBT in actual operating process, so as to send out early warning before the IGBT fails. The online monitoring method comprises the steps of: under the condition that the IGBT does not degrade, conducting a temperature experiment on an IGBT to be monitored, measuring junction temperature indexes (invariant voltage drop) representing IGBT junction temperature levels at different junction temperatures of the IGBT to be monitored and degradation indexes (conductive resistance) representing IGBT degradation degrees, and calculating a proportionality coefficient of degradation index variable quantity and junction temperature index variable quantity under the same junction temperature variation; and under the condition that the IGBT degrades, measuring a junction temperature index and a degradation index online, carrying out optimization of removing junction temperature influence on the degradation index by combining with the proportionality coefficient obtained through the temperature experiment under the normal condition, and monitoring the degradation degree of the IGBT to be monitored according to the optimized degradation index.

The invention discloses the damage positioning method of a beam bridge structure based on a mobile vehicle and belongs to the structure damage identification calculating field. The vehicles are movedat the different positions of the beam bridge structure, and the vehicles are considered as mass and are added to the structure. Through continuously moving the vehicles along a bridge length direction, the inherent frequency of a mass-structure system is measured, and then, stationary wavelet analysis is performed on a frequency signal and the damage position of the structure is positioned. By using the method, the information contents of the frequency can be greatly increased, the method does not depend on the finite element model of the structure, an anti-noise capability is high, operationis simple and is easy to implement, and a good application prospect is possessed.

The invention discloses a high-speed loading material dynamic indentation experimental method which is characterized by comprising the following steps of: firstly, fixedly arranging a cylindrical tested part on the end face of the front end of a circular section compression bar, adhering a strain gauge to the compression bar and electrically connecting the strain gauge and a high dynamic strain indicator; then fixedly arranging a light-triggered speed measurement device in front of the tested part; launching a shot by a shot lunching device and enabling the shot to pass through the light-triggered speed measurement device to impact the tested part; and finally, obtaining a press-in force, a press-in speed and a press-in displacement time history of the tested part by a relation. The high-speed loading material dynamic indentation experimental method has the advantages that by the experimental method, dynamic mechanical properties (such as the press-in force, the press-in speed and the press-in displacement time history) of the tested part in the impact process can be measured, so that the dynamic mechanical properties of a material are more deeply researched; moreover, the method can be suitable for a higher impact speed; the impact speed can reach 100m/s; and meanwhile, the experimental method has high measurement accuracy and adopts a simple data processing method.

The invention discloses a page monitoring method, apparatus and device, and a computer readable storage medium. The page monitoring method comprises the steps of obtaining to-be-detected message datacorresponding to a to-be-detected page; determining a first element word segmentation set corresponding to the to-be-detected message data; converting the first element word segmentation set into a first word segmentation vector corresponding to the to-be-detected page; utilizing a preset vector classification model to identify a target vector classification corresponding to the first word segmentation vector in the preset vector classification, wherein the preset vector classification model is generated according to historical message data corresponding to a historical page; and under the condition that the target vector classification is identified, determining that the to-be-detected page is in a normal state. According to the embodiment of the invention, whether the to-be-detected pageof the webpage is in the normal state or not can be accurately and efficiently judged.

Provided is a non-contact type measuring method and device for metal surface coating thickness, and a non-contact type eddy current detection probe is correspondingly selected according to the size ofa to-be-tested piece so as to carry out calibration, so that a relation curve of the eddy current signal and the corresponding lifting distance is obtained, and a metal matrix vortex ranging model ofthe to-be-tested piece is built, a vortex signal of the eddy current sensor is obtained in the detection process, and the distance from the center point of the metal matrix vortex area to the end surface of the eddy current probe according to the metal matrix vortex ranging model of the to-be-tested piece, and further the distance from the center point of the outer surface of the coating layer ofthe eddy current area to the plane, namely, the detection plane Pi where the light projection point of the laser ranging sensor group is located is measured according to the laser ranging sensor group, and finally the metal matrix surface coating thickness is obtained through calculation. According to the invention, stable and reliable nondestructive non-contact detection can be realized, and thedata processing method is simple, on-line detection is easy, so that a lot of economic cost and time are saved.

The invention discloses a positioning method for a Sagnac distributed optical fiber sensing system based on convolutional neural network ensemble learning. The method comprises the steps of taking a fixed interval point on a sensing optical fiber as a disturbance point, enabling the sensing system to obtain an interference signal generated by the simulation disturbance of each point, carrying outthe preprocessing of the interference signal, and enabling the preprocessed interference signal to serve as a training set and a verification set, training two convolutional neural network models fordifferent loss functions to enable the two CNN models to accurately position near-end and far-end disturbances respectively, combining training results of the two models through an ensemble learning method to obtain a disturbance position prediction model based on CNN ensemble learning, and optimizing parameters of each model through the verification set. A to-be-positioned interference signal ispre-processed as a test sample, and the to-be-positioned interference signal is tested by using the trained prediction model to obtain a disturbance position of the to-be-positioned interference signal. The method does not need signal demodulation, is low in system complexity, is not sensitive to noise, is simple in data processing method, is stable and accurate in positioning result, and can be used for the disturbance positioning of an annular or linear Sagnac distribution optical fiber sensing system.

The invention discloses a minimum distance sorting method assisted by a digital mapping brief spelling coding method and an internal sorting method, which is directly applied in the technical field of the total field digital mapping. The brief spelling coding method is composed of a type code+ (a series number)+ (a descriptor)+ (a feature code)+ (-an attribute code)(contents in the brackets are selectable), wherein the measured data is sorted by the minimum distance sorting method assisted by the brief spelling coding method. The minimum distance sorting method is as follows: sequentially calculating distances between the base point and the rest points from the starting point of the surface feature data point and taking the starting point of the surface feature data point as the base point, and selecting the data point with the shortest distance as the connection point with the base point, and taking the selected point with the shortest distance as the base point again, and sequentially calculating the distances between the base point and the rest points, and selecting the data point with the shortest distance as the connection point with the base point, and repeating the steps until no rest points are left; finally, sorting the data points with the shortest distances from each selection based on the precedence such that the sequence fully ensures the connection relationship between each surface feature data point and the other points. The minimum distance sorting method can achieve full automation on field mapping fast coding and interior data processing and map making.

The invention discloses a temperature regulating device used for a handle and a regulating method thereof. The temperature regulating device comprises a temperature sensor array and a controller, wherein the temperature sensor array is arranged on a hollow handle; the interior of the hollow handle is provided with a heating plate and a refrigerant plate; a protective cover is arranged at one end of the hollow handle; the protective cover is internally provided with a fan; and the heating plate, the refrigerant plate, the temperature sensor array and the fan are connected with the controller through a control circuit respectively. The temperature regulating device solves the defects that the temperature of a palm is seriously influenced by the environment when the handle is grasped by a user in the prior art and cannot be maintained in a comfortable range and the hand comfort of the user is influenced.

The invention belongs to the technical field of oil product composition analysis, and particularly relates to a waste animal and vegetable fat hydrogenation product composition analysis method. The method comprises the following steps of carrying out viscosity reduction treatment on a sample; carrying out sample analysis by using a gas chromatograph-mass spectrometer, wherein the gas chromatography adopts a modified polyethylene glycol capillary chromatographic column; and performing data processing to obtain a sample composition result. The method utilizes the one-dimensional gas chromatography-mass spectrometer and the modified polyethylene glycol capillary chromatographic column for realizing efficient analysis of main components contained in a to-be-detected sample. The method has theadvantages that the operation error possibly introduced in the complex sample pretreatment process is avoided, or different influences on the test result caused by different pretreatment methods and conditions are avoided, and the used instrument is universal and easy to obtain and low in cost, so that the analysis method is suitable for popularization.

The invention discloses a device and a method for optical micro-rheology for characterizing the viscoelasticity of a soft substance. Coherent light generated by a laser light source is focused by a lens and irradiated on a sample to be detected in a sample cell, and a dynamic laser intensity speckle image sequence formed by scattered light after the sample to be detected is scattered is collected by a camera and transmitted to a computer for processing. And mathematical transformation is carried out on the obtained speckle light intensity diagrams of a material to be detected at different moments to obtain a pseudo-phase diagram of the speckles, and optical vortex position information can be obtained through the pseudo-phase diagram. Statistical information of mean square displacement of the optical vortex in unit time at different moments is obtained through calculation by tracking random motion of the optical vortex, and information for characterizing the viscoelasticity of the material to be detected is finally obtained through the corresponding relation between the viscoelasticity of the material to be detected and the mean square displacement of the vortex point. A measuring system is simple, only a trace sample is needed, particle movement in the sample does not need to be tracked, and high-frequency response which cannot be obtained by a traditional rheometer can be obtained.