63 results about "Paper sample" patented technology

The invention discloses a method for rapidly identifying the type of yellow spots on the surface of a cigarette by using an infrared spectrum, and relates to the field of tobacco and cigarette products, and the method comprises the following steps: cutting a cigarette paper sample with yellow spots from cigarette paper of a yellow spot cigarette as a yellow spot sample; a cigarette paper sample without yellow spots is cut from the blank cigarette paper outside the yellow spot area to serve as an out-spot cigarette paper sample; the method comprises the following steps: respectively placing a yellow spot sample and an out-spot cigarette paper sample in an ATR part of an attenuated total reflection infrared spectrometer, collecting ATR-FTIR spectral data of the samples, and calculating an A value; comparing the A value of the macular sample and the A value of the out-of-spot cigarette paper sample with a database, performing auxiliary judgment by combining with the characteristic peak form, and judging the type of the macular according to a comparison result.

The present application relates to the field of material performance detection, and discloses a corrugated paper moisture resistance detection method and system, comprising: first, obtaining the storage environment of the corrugated paper sample and collecting environmental data, and then performing dynamic moisture absorption analysis and calculating the moisture penetration rate; then, combining the rate analysis structure with the moisture state, querying the moisture regain index, and then performing layered humidity detection to obtain interlayer moisture change data; then, calculating the moisture resistance residual strength based on the data, generating the moisture resistance efficiency index combined with temperature and humidity, and dividing the moisture regain risk level; finally, configuring multi-stage early warning indicators according to the level, positioning the edge moisture absorption area and calculating the diffusion gradient value, generating a humidity stability signal and sending it to the terminal, and formulating a moisture regain detection strategy according to the feedback. The present application can guarantee the accuracy of the corrugated paper moisture regain detection.

The invention relates to an electric-thermal combined aging simulation system and an aging simulation method of oiled paper. The system comprises an aging oven, a sealing oil groove arranged in the aging oven, and an electrode module and a temperature control module which are arranged in the sealing oil groove, the sealed oil groove is filled with insulating oil, the electrode module comprises an upper electrode and a lower electrode parallel to the upper electrode, and an oil paper sample is placed between the upper electrode and the lower electrode; the electrode module is used for applying an electric field to the surface of the oiled paper sample to simulate the electrical aging process of the oiled paper sample; and the temperature control module is used for adjusting the temperature of the insulating oil in the sealed oil groove in the process of simulating the electrical aging of the oiled paper sample so as to simulate the process of the combined action of thermal aging and electrical aging of the oiled paper sample. By adopting the method, accurate control of electric-thermal aging can be realized.

The utility model discloses a female underpants's pattern base structure, including front piece plate, back piece plate, front wave and back wave, the bottom of the front piece plate is provided with the front waistline, one side of the front piece plate is provided with the front crotch curved line, the other side of the front piece plate is provided with the front side sewing line, the top of the front piece plate is provided with the front foot mouth surrounding line, and the back piece plate is provided with the front crotch curved line and the back side sewing line. A rear waistline is arranged at the top of the rear sheet plate, and a rear crotch bent line is arranged on one side of the rear sheet plate; according to the utility model, the female underpants are divided into two parts along the center line, and when the pattern design is carried out, the standard underpants pattern can be obtained by respectively drawing the two templates on the paper, so that various different styles of female underpants patterns can be designed, the trouble that formula calculation needs to be carried out every time the pattern design is carried out is saved, and the design efficiency is improved. When the paper pattern template is applied in actual production, the operation is convenient and fast, and errors caused by operation of different template designers according to personal subjective experience in the past can be solved.

The invention discloses a Matlab-based intelligent conversion method from a garment style drawing to a paper pattern, and relates to the technical field of garment design, the Matlab-based intelligent conversion method comprises a bottom plate, supporting legs are fixedly connected to the bottom of the bottom plate, a box body is fixedly connected to the top of the bottom plate, and a case body is fixedly connected to the bottom of an inner cavity of the box body; one side of the box body is detachably connected with a box door, a heat dissipation mechanism is arranged in the box body, a dustproof mechanism is arranged in the box body, and an installation mechanism is arranged in the box body. Heat dissipation is carried out through the cooling mechanism in a mode of simultaneously carrying out water cooling and air cooling, the heat dissipation effect of the device is effectively improved, the heat dissipation effect of the device is better than the heat dissipation effect of purely depending on increase of the air circulation amount in the case, the heat dissipation effect of the device is prevented from being affected by blockage of heat dissipation holes through a dustproof mechanism, and the heat dissipation effect of the device is not affected through a mounting mechanism. And the box door can be disassembled without any tool, so that the use convenience of the device is improved.

The utility model provides a detachable sampler, relates to the technical field of samplers, and aims to solve the problems that when an existing detachable sampler is used for cutting and sampling test paper, a cutting mold of the detachable sampler can only adapt to a single size specification, and cannot be flexibly switched to other sizes during sampling operation, so that the sampling efficiency is high. The paper sample size detection device comprises a lower pressing shaft and a fixed lantern ring, the bottom of the lower pressing shaft is fixedly connected with a cutting plate; and an overlapping lantern ring is arranged in the fixed lantern ring. The overlapping lantern ring is arranged in the fixing lantern ring, the cutting lantern rings with different diameters can be fixed in an overlapping mode, the multiple sets of cutting grooves with the diameters shrunk inwards are formed in the bottom of the cutting plate and can be matched with the cutting lantern rings, and by means of the structure, the sampling device can meet the cutting requirements of various paper samples with different sizes and adapt to diversified test scenes.

1. Name of the product in this design: Intelligent Desktop Scanner. 2. Application of this design: This design is used for scanning the appearance of planar materials (including physical objects and paper patterns, etc.), which can collect the appearance information of the scanned material, extract the material outline, and can be used for material cutting and processing. 3. The key design feature of this product is its shape. 4. Images or photographs that best illustrate the design's key points: Reference images.

The invention belongs to the technical field of bent pipe machining, and particularly relates to a steel large-diameter pipeline bent pipe on-site forming method which comprises the steps that the bending angle is measured through a rope and a protractor; the outer perimeter of the pipe is measured by a tape; the bending radius is calculated, and the back height and the belly height of the end joints are calculated according to a given formula; after the steel pipe is horizontally and stably supported, popping up two axial center lines by using the ink box, popping up a bus at equal division points of the circumference, sequentially marking flush opening intersection points of end joints and middle joints according to calculated sizes, and connecting to form a closed cutting line; cutting along a line by using oxygen-propane neutral flame, numbering and assembling, controlling an alignment gap, cutting a V-shaped groove on site, remeasuring the angle by using a protractor after spot welding, correcting distortion, and turning, welding and forming. The bent pipe can be manufactured on the steel pipe feeding and discharging without a material paper sample plate, material paper sample plate manufacturing can be omitted, sample plate errors are avoided, bent pipe manufacturing precision is improved, meanwhile, the method can adapt to the field construction environment, the technology is simplified, rework and material waste are reduced, cost is reduced, and construction efficiency is improved.

The utility model relates to the technical field of clamping, in particular to a clamping device for detecting a sample, which comprises a base and a clamping mechanism, a rectangular groove is arranged in the middle of the base, and test paper for detecting the sample is placed in the rectangular groove; the clamping mechanism comprises a clamping cover plate and a positioning block, four inserting grooves are formed in the top of the base and located in the outer side of the side length of the rectangular groove, and the positioning block is arranged at the bottom of the clamping cover plate and matched with the inserting grooves. Clamping blocks are telescopically arranged on the side walls of the positioning blocks, clamping grooves are formed in the side walls of the inserting grooves, and the clamping blocks are clamped and matched with the clamping grooves; a pressing block is arranged at the bottom of the clamping cover plate and is used for pressing corners of the test paper of the detection sample. According to the utility model, the displacement of the test paper sample in the observation process of the electron microscope due to vibration and the like can be effectively prevented, and the accuracy of the observation result is ensured.

The invention relates to a paper literature deacidification effect evaluation method based on an anhydrous liquid phase, which comprises the following steps: setting an effectiveness index and a safety index, obtaining each index value of a deacidified paper sample by adopting a corresponding detection method, and comparing the values with a preset threshold value to realize evaluation of the deacidification effect. The effectiveness indexes comprise pH, alkali reserves, deacidification uniformity, polymerization degree and zero-distance tensile strength, and the safety indexes comprise chromatic aberration, appearance deformation and deacidification liquid safety; the deacidification uniformity is evaluated through the distribution uniformity of alkali reserves, and the distribution uniformity of the alkali reserves is that the relative standard deviation of the alkali reserves of a plurality of parts of the paper sample is less than 30%, and the alkali reserves of each part are 0.12-0.60 mol / kg. According to the method, systematic and comprehensive evaluation on the deacidification effect is realized, a clear standard can be provided for industrial admission of deacidification materials and processes, invalid or harmful deacidification treatment is avoided, development of a deacidification repair technology is promoted, and long-term storage and safe utilization of paper documents are realized.

This invention relates to the field of substrate glass manufacturing and testing technology, and provides a method for testing the performance of spacer paper for substrate glass. The method includes: in a constant temperature and humidity clean environment, processing the testing equipment to constant weight; mixing and sampling multiple units of the spacer paper sample, and then transferring the samples to a constant-weight testing equipment for weighing; drying the samples at 105±2℃ to constant weight, and calculating the moisture content based on the mass difference before and after drying; and igniting the samples at 900±25℃ until completely ashed, and calculating the ash content based on the mass difference before and after ignition. This invention, through constant temperature and humidity operation and multi-unit mixed sampling, eliminates environmental interference and sampling bias, achieving continuous and accurate testing of moisture and ash content, and significantly improving the accuracy and repeatability of the test results.

The utility model discloses a cutting machine gun head structure with an automatic marking pen, which comprises a cutting platform, a multi-axis moving module and a gun head, the telescopic pen assembly comprises a fixing support arranged on the gun head, a lifting assembly arranged on the fixing support, a clamping base arranged at the moving end of the lifting assembly and a marking pen movably clamped on the clamping base, and the lifting assembly drives the clamping base to move up and down. The marking pen is descended through the lifting assembly, so that the pen point of the marking pen is in contact with kraft paper, the gun head is driven by the multi-axis moving module, the marking pen is made to draw and mark on the kraft paper, an operator can conveniently obtain a paper sample, the number of overall equipment needing to be arranged is reduced, and the overall cost input is effectively reduced; and drawing is directly carried out on the cutting machine, so that the overall working efficiency can be improved, and manual participation is reduced.

The application relates to the technical field of computer vision and image processing, and particularly discloses a paper surface mold spot growth dynamic detection method and device; the detection method comprises the following steps: S1, acquiring a surface visible light image of a paper sample to be detected; S2, pre-processing the surface visible light image; S3, inputting the pre-processed image into a mold spot segmentation model pre-trained to obtain a pixel-level segmentation result image, wherein the segmentation result image at least contains a mold spot area category and a paper healthy area category; and S4, based on the segmentation result image, calculating one or more quantitative indexes for representing mold spot growth states; the detection device comprises an image acquisition module, a preprocessing module, a segmentation module and an analysis module; and the application is beneficial to realizing high-precision segmentation of a paper surface mold spot area and dynamic quantitative analysis of a mold growth process.

The utility model discloses a test system for paper compounding fastness, which comprises two groups of rubber roller assemblies, a coating machine and a drying box, and the two groups of rubber roller assemblies are arranged at the feeding end of the coating machine and are used for pressing paper and an aluminum film and controlling the gluing amount; the coating machine is used for clamping paper and an aluminum film and enabling the paper and the aluminum film to pass between the two rubber roller assemblies at a constant speed under traction; the drying box is mounted on the upper side of the rear end of the coating machine and is used for drying the composite paper sample fed by the coating machine at a constant speed at a constant temperature; the two groups of rubber roller assemblies effectively improve the uniformity of a glue banner when paper and an aluminum film are laminated, the gluing amount and coherent drying of a drying box are controlled by controlling a gap between each group of rubber rollers and the speed of a coating machine, immediate drying is achieved after compounding, excessive permeation of glue is avoided, the actual compounding process of a user is achieved before a compounding test, and the production efficiency is improved. The paper and the aluminum film adopt the uniform compounding standard, the uniform coating amount and continuous drying after gluing are achieved, and the difference existing in manual compounding fastness detection is effectively avoided.

The utility model belongs to the technical field of paper pattern printing, and particularly relates to automatic paper pattern printing equipment which is firm in paper pattern and comprises a base. A cavity is formed in the base; the top of the base is fixedly connected with a storage table; a plurality of air holes are formed in the middle of the storage table; the plurality of air holes are uniformly distributed in the middle of the storage table; the air holes are small in diameter; the bottom of the air hole is fixedly connected with an air cover; a pair of sucking pumps is fixedly connected to the bottom of the inner side wall of the base; the sucking pump is communicated with the gas hood; the bottom of the inner side wall of the gas hood is fixedly connected with a pair of filter screens; the filter screen and the air extracting pump are correspondingly arranged; a moving assembly is arranged at the top of the storage table; by means of the structure, the air extracting pump is arranged to be connected with the air hood, the storage table and the air holes, negative pressure can be generated between paper and the storage table through the air extracting effect of the air extracting pump, and therefore the paper is adsorbed and fixed to the top of the storage table, the paper fixing convenience is improved, and the situation that the process is tedious due to the fact that a large number of fixing tools are used is reduced.

The invention relates to an electric-wet combined aging simulation system and an aging simulation method of oiled paper. The system comprises a sealed cavity, an electrode module and a humidity control module, wherein the electrode module and the humidity control module are mounted in the sealed cavity; wherein the electrode module comprises a rod electrode fixed at the top of the sealed cavity and a plate electrode fixed at the bottom of the sealed cavity; the plate electrode is used for placing an oiled paper sample; the electrode module is used for performing halo discharge on the oiled paper sample so as to simulate the electrical aging process of the oiled paper sample; and the humidity control module is used for adjusting the relative humidity in the sealed cavity in the process of simulating the electrical aging of the oiled paper sample so as to simulate the electrical aging process of the oiled paper sample in a damp state. By adopting the method, electric field stress and humidity effects are considered simultaneously.

The invention provides a qualitative detection method for AKD and ASA sizing agents in a paper product. The method comprises the following steps: (1) treating a sample; (2) preparing a test sample; (3) preparing a comparison sample; and (4) carrying out thermal cracking-gas chromatography-mass spectrometry combined detection. According to the present invention, the AKD and the ASA in the paper product are qualitatively determined by using the thermal cracking-gas chromatography-mass spectrometry combined method through the research, the paper sample is directly placed in the pyrolysis instrument connected with the gas chromatograph, the cellulose is completely decomposed into the volatile substance at the high temperature, the reacted sizing agent and the unreacted sizing agent in the paper product are released, and the paper product is subjected to the thermal cracking-gas chromatography-mass spectrometry combined method, and whether the paper product contains the sizing agents such as AKD and ASA or not can be qualitatively analyzed according to test data of a gas chromatography-mass spectrometer. The technical scheme is simple, rapid and low in cost, and provides a reliable basis for paper identification and fiber source analysis.

The invention discloses an insulation paper target attribute prediction method, system and device, and relates to the technical field of insulation materials, and the method comprises the steps: collecting the near infrared spectrum data of various types of insulation paper samples; constructing a domain adversarial neural network model, wherein the domain adversarial neural network model comprises an inter-domain shared feature extractor, a domain discriminator and a regression predictor; training the domain adversarial neural network model by adopting a staged strategy: in a feature learning stage, closing a gradient inversion layer to train the classification capability of a domain discriminator on different types of insulation paper samples; in an adversarial adaptation stage, starting a gradient inversion layer and dynamically adjusting inversion intensity, and forcing an inter-domain shared feature extractor to generate features irrelevant to the type of the insulation paper; inputting near infrared spectrum data of to-be-tested insulation paper into the trained prediction model, and predicting a target attribute value of the insulation paper; the method can improve the prediction performance of unknown samples.

The invention discloses an environment-friendly corrugated board edge pressure strength detection device. The edge pressure strength detection device comprises a machine body, a detection piece, a placement piece and a limiting mechanism, the detection piece is mounted at the top of the machine body; the placing piece is arranged in the machine body in a vertical lifting mode, and the top of the placing piece is located under the detection piece; the limiting mechanism is arranged on the placing piece, and the limiting mechanism is composed of a fixing block and an adjusting assembly; according to the invention, a limiting mechanism composed of a fixing block and an adjusting assembly is designed, and the fixing block is connected with the placing table, so that the stability of foundation positioning is ensured; the adjusting assembly is adjusted according to the thickness of the corrugated paper sample, and the position of the adjusting assembly is automatically locked after the adjusting assembly is adjusted to a designated position, so that the displacement risk caused by vibration or human touch in the testing process is effectively eliminated, and the limiting mechanism is clamped and attached to the corrugated paper sample.

The present application relates to the technical field of data analysis, and is a glass spacer paper defect detection method and system based on image recognition, specifically comprising: constructing a glass spacer paper stable laying evolution model to obtain a stable laying reference evolution state of a current paper sample to be detected; analyzing the disturbance influence of residual winding memory release on the image recognition result of the current paper sample to be detected; analyzing the additional influence of the delayed morphology evolution caused by the time-delayed rebound evolution process and the in-plane abnormal expansion process of the current paper sample to be detected after tension unloading on the image recognition result; constructing an image judgment correction model to output a corrected defect recognition result, and evaluating whether the glass protection effectiveness of the current glass spacer paper to be detected meets the use requirements according to the corrected defect recognition result. The present application solves the problem that there is a lack of effective early warning for delayed and evolution-type hidden defects in the prior art.

The application discloses a method for controlling the interlayer bonding strength of paper, which comprises the following steps: step S1, pretreatment, the multi-layer paper is pretreated, the fiber layer which does not need to be detected is peeled off, and only the detection layer to be detected is left; step S2, the detection layer is detected by an interlayer bonding strength tester; step S3, step S2 is repeated, the detection layer paper samples of different layers are detected respectively, the bonding strength of the corresponding detection layer of the paper is obtained, and the bonding strength present situation and problems of each layer are analyzed; and step S4, the content of the additive or the type of the fiber in one or more detection layers of the paper is adjusted, the bonding of the one detection layer or the different detection layers is controlled, the Z-direction strength of the paper after the adjustment is adjusted, and the single-layer detection or the interlayer detection of the multi-layer paper and the control of the bonding strength are realized.

This invention relates to the field of polymerization degree detection technology, and discloses a method and system for detecting the polymerization degree of insulating paper in transformers. The method includes acquiring viscosity data of insulating paper samples and corresponding solvent type, temperature change rate, and concentration difference; constructing a multi-dimensional feature vector and merging it into an original dataset; grouping and statistically analyzing by solvent, temperature, and concentration to obtain a set of correction factors and performing three corrections sequentially: when the temperature change exceeds a threshold, the viscosity is corrected using a temperature correction factor; when the solvent influence exceeds a threshold, the viscosity is corrected using a solvent correction factor; when the concentration difference from the standard value exceeds a threshold, the viscosity is adjusted using a concentration correction factor. Finally, a final viscosity set after multi-factor correction is obtained, and the polymerization degree value is obtained through the conversion relationship between viscosity and polymerization degree. This method can accurately establish a correction and calculation mechanism reflecting the true aging state of insulating paper under complex and variable experimental conditions, achieving high-precision detection of the polymerization degree.

The invention relates to the technical field of cultural relic restoration, in particular to a protection and restoration method for paper cultural relics based on a film transfer method. The method comprises the following steps: coating the surface of a water-based filter membrane with a bacterial cellulose repairing agent to form a BC repairing membrane on the water-based filter membrane; and the BC repairing film is transferred to the surface of the to-be-reinforced paper cultural relic, drying is conducted, the water-based filter film is removed, and the reinforced paper cultural relic is obtained. Compared with an instillation method, the method has the advantages that the paper cultural relics are integrally repaired and reinforced by adopting a film transfer method, the BC coating amount is smaller, the coating is more uniform, the permeability is higher, a breathable BC repairing film can be formed on the surface of the paper, the BC enables hydrogen bonds to be more tightly combined with the paper through film transfer, and the cultural relic protection and repairing principle of minimum intervention is met. The tensile index, the folding strength and the tearing index of the reinforced paper cultural relic prepared by adopting the film transfer method provided by the invention are remarkably improved, the pH value is also improved compared with that of a blank paper sample, and the comprehensive mechanical property is excellent.

The application discloses a paperboard folding and bursting resistance performance test method, a computer device and a storage medium. The method comprises the following steps: obtaining a first test paper sample; performing indentation on the first test paper sample to obtain a bursting index of the first test paper sample and an indentation coefficient corresponding to the bursting index; obtaining a second test paper sample, wherein the second test paper sample comprises at least two paper samples; performing indentation on one of the second test paper samples by using the indentation coefficient; performing stiffness testing on the second test paper sample after the indentation to obtain stiffness data of the second test paper sample after the indentation; performing stiffness testing on the second test paper sample without indentation to obtain stiffness data of the second test paper sample without indentation; calculating a folding factor of the second test paper sample according to the stiffness data of the second test paper sample after the indentation and the stiffness data of the second test paper sample without indentation; and obtaining the folding factor by calculation, so as to provide selectable parameters for subsequent processing.

The invention discloses an oil paper insulation characteristic measuring device which comprises a box body, a first measuring assembly and a second measuring assembly, an adjusting cylinder penetrates through a fixed cylinder and is in threaded connection with the fixed cylinder, a clamping plate is rotatably connected with the adjusting cylinder, and a first via hole and a second via hole jointly define a liquid inlet channel. The liquid injection pipe is communicated with the liquid inlet channel, the first voltage rod is electrically connected with the first electrode plate, a plurality of first through holes are formed in the peripheral wall of the liquid injection pipe, and a plurality of second through holes are formed in the peripheral wall of the adjusting cylinder; one end of the lower infusion tube is communicated with the infusion channel, the other end of the lower infusion tube extends out of the box body, and the second voltage rod is electrically connected with the second electrode plate. According to the oil paper insulation characteristic measuring device, air between the first electrode plate and the second electrode plate and the oil paper sample can be efficiently discharged, an air cavity is eliminated, interference of air dielectric characteristics on detection is avoided, accuracy of dielectric parameter measurement is guaranteed, and meanwhile electric field distortion is reduced.

This invention belongs to the field of solvent residue determination technology, specifically relating to a sample bottling device for solvent residue determination. The device includes a clamp with two clamping rods. A rotary drive module drives the clamp to rotate about the length of the clamping rods. A pressure roller is positioned with its side facing at least one clamping rod. A first transfer module drives the pressure roller to move parallel to the length of the clamping rods and / or away from the side of the clamping rods. A bracket has a receiving groove for placing headspace vials, and the bracket faces the ends of the two clamping rods to expose the bottle openings. A linear movement module drives the bracket to move parallel to the length of the clamping rods, so that the headspace vials are fitted over the paper sample wound around the two clamping rods. This invention improves winding efficiency and paper sample bottling efficiency, while reducing reliance on manual skill and training costs.

The invention discloses a method and a design system for evaluating aging of insulation paper, and the method comprises the following steps: obtaining near infrared spectrum data and corresponding actual polymerization degrees of insulation paper samples in different aging states, and carrying out the standardization and smoothing of the spectrum data; performing orthogonal decomposition on the polymerization degree matrix Y to obtain a projection part Y1 and a residual part Y2 of the spectrum matrix X; orthogonalizing the spectrum matrix X, and removing a component X1 collinear with Y1 to obtain a component X2 irrelevant to Y1; performing singular value decomposition on X2, extracting a first principal component direction t, performing linear regression on t by X, and taking an obtained regression coefficient as a weight w of each characteristic wavelength; normalizing the absolute value of the weight w to obtain the probability pi that each characteristic wavelength is filtered; generating a standard normal distribution random vector, taking an absolute value and normalizing the absolute value to obtain a threshold vector di; pi and di are compared, and pigt is filtered out; keeping pit according to the characteristics of di; obtaining an initial feature subset according to the features of di; constructing a partial least square regression model, calculating a polymerization degree predicted value and a root-mean-square error, and verifying the effectiveness of a subset; and iteratively optimizing the feature subsets for multiple rounds until the feature number is smaller than the PLS principal component number, and outputting the optimal feature subset corresponding to the minimum RMSE. The method can improve the prediction precision of the polymerization degree.

The invention is suitable for the technical field of oil paper insulation damp state evaluation, and provides a multi-element mixed insulating oil transformer oil paper insulation damp state evaluation method, which comprises the following steps: acquiring a multi-element mixed insulating oil impregnated paper sample to be evaluated, and placing the sample in a three-electrode device; the method comprises the following steps: under a constant temperature condition, applying multi-stage alternating voltage to a sample through a frequency domain dielectric response tester, measuring dielectric loss values under different frequencies, and generating a frequency domain dielectric spectrum characteristic curve; based on the frequency domain dielectric spectrum characteristic curve, extracting a dielectric loss value corresponding to the preset characteristic frequency point as a damp characteristic parameter; inputting the damping characteristic parameter into a pre-stored damping evaluation model, wherein the model comprises a nonlinear fitting function of the dielectric loss value of a preset characteristic frequency point and the water content; and according to the water content value output by the nonlinear fitting function, generating a damp state evaluation result. According to the invention, the evaluation precision of the damp state of the multi-element mixed insulating oil impregnated paper is effectively improved.