181 results about "Magnetic films" patented technology

The invention discloses a flexible magnetic tactile sensing device based on a microstructure elastic layer, a three-dimensional force measuring device and a measuring method.The flexible magnetic tactile sensing device comprises a flexible magnetic film, the microstructure elastic layer, a Hall sensor, a PCB and a bottom shell, the Hall sensor is installed on the PCB, and the flexible magnetic film, the microstructure elastic layer, the PCB and the bottom shell are sequentially stacked from top to bottom; the microstructure elastic layer is of a non-planar structure, when the flexible magnetic film deforms due to stress, deformation of the flexible magnetic film is transmitted to the microstructure elastic layer, the change of the three-axis magnetic field intensity is measured through the Hall sensor and uploaded to a PC terminal for data processing, and three-dimensional force measurement is achieved. Three-dimensional force measurement can be achieved, the flexible magnetic film can generate local deformation in the normal direction when normal force is applied, the flexible magnetic film can generate tangential displacement when tangential force is applied, and application scenes suitable for different microstructure elastic layers are provided according to quantitative analysis results.

The invention relates to a soft mesh magnetic sensor for tactile and non-tactile perception. The sensor comprises a neodymium iron boron-organic silicon elastomer magnetic film, an aluminum foil, a PDMS elastomer, a TMR element and a printed circuit board, wherein the TMR element is welded on the printed circuit board, and the PDMS elastomer coats the TMR element and covers the PCB; the PDMS elastomer is covered with an aluminum foil, and a neodymium iron boron-organic silicon elastomer magnetic film is arranged on the aluminum foil; the PDMS elastomer is of a sandwich structure and is composed of an upper thin film, a lower thin film and a middle small cylinder array. The lower film is provided with a strip-shaped groove which is used for wrapping the TMR element. The soft grid magnetic sensor disclosed by the invention has the advantages of high sensitivity, high flexibility and strong multi-mode sensing capability.

The invention provides a resin composition, a magnetic film and application thereof. The resin composition comprises the following components: (A) magnetic filler, (B) epoxy resin, (C) a curing agent, (D) a flexibilizer and (E) polyester polyol, the number average molecular weight of the (E) polyester polyol is 2000 to 3000. According to the resin composition provided by the invention, through screening and synergistic compounding of specific components, the resin composition has relatively high magnetic conductivity and relatively low magnetic loss under high frequency after being cured, and meanwhile, the binding force with a copper layer is relatively high.

The application discloses a flexible multi-dimensional force sensor based on a centripetal gradient magnetic field design and a preparation method thereof, and belongs to the field of electronic devices. The flexible multi-dimensional force sensor comprises, from top to bottom, a protective layer, a magnetic film layer, a buffer layer and a transmission layer. The protective layer comprises a flexible base material with force-sensitive characteristics. The magnetic film layer is provided with a cross-shaped groove on the bottom surface, and the edges of the groove are arc-shaped, so that a magnetic field with a gradient magnetic flux can be formed. The buffer layer comprises a strain material with a stepped shape. The transmission layer comprises an electromagnetic effect chip with three-axis magnetic field sensing capability and a readout circuit thereof. Compared with the prior art, the sensor of the application realizes natural decoupling from the magnetic field design, and has decoupling capability on three axes. The gradient design of the application enables the sensor to have different response slopes at different stress stages when subjected to stress, greatly improves the force measurement range of the device, and the sensing sensitivity and range on the three axes are the same.

The invention discloses a visual tactile sensor based on a magnetic imaging principle. The visual tactile sensor comprises a shell, an image acquisition module, a magnetic pole display film, an elastic body and a magnetic film, the magnetic pole display film, the elastic body and the magnetic thin film are arranged in the shell from top to bottom, and the image acquisition module is located above the magnetic pole display film and used for acquiring an image of the magnetic pole display film; when the sensor is used for pressure sensing, the position with the maximum gray level variation of the magnetic pole display film image is the pressure acting position, and the pressure is equal to the result that the gray level variation of the magnetic pole display film image is divided by the magneto-optical conversion coefficient of the magnetic pole display film and the product thereof. The magnetic induction intensity in the center range of the surface of the magnetic film, the initial distance between the magnetic film and the magnetic pole display film and the equivalent elastic coefficient of the magnetic film and the elastic body are related. The sensor converts a mechanical signal into a magnetic field signal and then converts the magnetic field signal into an optical image, high-sensitivity sensing of tiny pressure is achieved, and meanwhile the sensor has the higher signal-to-noise ratio, stability and anti-interference capacity.

The invention discloses intelligent tongue muscle pressure detection equipment, and relates to the technical field of tongue muscle pressure detection. Comprising an array type sensing assembly, and the array type sensing assembly comprises an array type Hall sensor, a middle elastic body and a magnetic film which are sequentially connected from bottom to top; the array type Hall sensor comprises a substrate layer, a plurality of graphene active parts are uniformly arranged on the substrate layer in an array mode, and metal electrodes are arranged on the peripheral sides of the graphene active parts. The device further comprises a handheld assembly, and the handheld assembly is connected with the array type sensing assembly. The array type sensing assembly is integrally soft and can fully combine with the deformation characteristic of human skin, and the multiple graphene active parts are arranged in an array and matched with the vertical periodic magnetization magnetic film, so that the force resolution, the sensitivity, the linearity, the hysteresis and the like are greatly improved; and a basis is provided for subsequent clinical experiments such as tongue muscle pressure test and marketization application.

The invention discloses a visual tactile sensor, an electronic skin and a robot, relates to the field of sensors, and is used for improving the comprehensiveness and sensitivity of stress detection. The sensor comprises a magnetic film covering the top surface and the side surface, and the magnetic film is prepared by mixing magnetic powder and silicone rubber; the support supports the magnetic thin film, a magnetic display card and a light source are arranged in the support, the visual touch collector collects magnetic induction data and development data of stress of the magnetic thin film, and then the multi-mode pressure detection model analyzes the stress position and / or the stress size. The stress detection sensitivity is high, comprehensive detection of the top face and the side faces can be achieved, and the detection precision is high.

The invention belongs to the technical field of low-noise magnetic shielding, and particularly relates to a flexible high-temperature-resistant magnetic shielding film and a preparation method thereof.The preparation method comprises the steps that a PI double-sided tape is attached to one side of a glass slide, and a PTFE / PDMS film is attached to one side of the glass slide to serve as a substrate sprayed by a silver nanometer bundle net; preparing a silver nanowire solution, and spraying the silver nanowire solution on the PTFE / PDMS film by using a spray gun to obtain a silver nano bundle net; spin-coating, curing and transferring the silver nano bundle net to obtain a flexible substrate of the cured silver nano bundle net; according to the flexible high-temperature-resistant magnetic shielding thin film and the preparation method thereof, the characteristic that the silver nanometer bundle net has the electromagnetic shielding performance is utilized, soft magnetic thin films are sputtered on the two sides of the silver nanometer bundle net, the shielding effectiveness of a traditional single-layer shielding thin film is further improved, and the flexible high-temperature-resistant magnetic shielding thin film is obtained. The obtained thin film is light in weight and meets the flexible application requirement of the magnetic shielding thin film, the application space is complex and changeable, and the flexible shielding thin film is light in weight, good in flexibility and excellent in shielding performance.

The invention relates to a high-toughness anti-crack magnetic decorative film and a preparation method thereof. The decorative film is prepared from the following raw materials in parts by weight: 40 to 60 parts of poly (dihydrothiophene-vinyl ether) copolymer, 10 to 25 parts of shell layer self-assembly modified Fe3O4 nanosheets, 5 to 15 parts of polyether ester block elastomer, 0.5 to 2 parts of sodium dodecyl benzene sulfonate, 0.5 to 1.5 parts of fluorosilane coupling agent, 0.1 to 1.0 part of 2-hydroxybenzotriazole ultraviolet absorbent, 3 to 6 parts of bisphenol A type epoxy curing agent and 0.05 to 0.5 part of imidazole catalyst. The flexible copolymer is synthesized through copolymerization of dihydrothiophene and vinyl ether, the modified Fe3O4 nanosheets form a Fe3O4 structure through coprecipitation of ferric chloride and ferrous chloride and regulation and control of ammonia water, and shell self-assembly coating is carried out through tetraethoxysilane and a block micromolecule interface agent. The material has excellent tensile strength, elongation at break, magnetic adsorption force and cycling stability, and is suitable for the application fields of flexible magnetic films and high-adhesion decorations.

The invention provides a magnetic resin composition, a magnetic film and application thereof. The magnetic resin composition comprises (A) a magnetic filler, (B) epoxy resin, (C) a curing agent and (D) a flexibilizer, the magnetic filler (A) comprises carbonyl iron powder (A1), FeSiCr alloy (A2) and iron-based nanocrystals (A3); based on the total mass of the magnetic resin composition as 100%, the content of the (A) magnetic filler is 85% or more; based on 100% of the total mass of the magnetic filler (A), the content of the carbonyl iron powder (A1) is 55%-65%, the content of the FeSiCr alloy (A2) is 15%-25%, and the content of the iron-based nanocrystalline (A3) is 15%-25%. According to the magnetic resin composition and the preparation method thereof, specific types of magnetic fillers are introduced and compounded according to a specific content, so that the magnetic resin composition has relatively high magnetic conductivity and relatively low magnetic loss after being cured, and meanwhile, the binding force with a copper layer is relatively high.

The invention provides a tactile sensor and a calibration method of the tactile sensor, and belongs to the technical field of sensors, the tactile sensor comprises a magnetic sensing layer, a pressure sensing layer and a flexible stress layer which are stacked in sequence; a magnetic film made of a magnetic material is embedded in the flexible stress layer, and after the flexible stress layer is subjected to three-dimensional force, the position of the magnetic film is changed; the pressure sensing layer is used for measuring a normal force of a three-dimensional force; and the magnetic sensing layer is used for detecting and acquiring magnetic field data of the magnetic film at different positions before and after the magnetic film is stressed so as to solve a three-dimensional force. According to the touch sensor provided by the invention, after the flexible stress layer is stressed, the pressure is transmitted to the pressure sensing layer through deformation, so that normal force detection is realized; meanwhile, according to the magnetic field change of the magnetic sensor before and after the flexible stress layer is stressed, the displacement change of the magnetic film is calculated, and finally the three-dimensional force is generated through decoupling.

The invention belongs to the technical field of magnetic field sensing, and discloses a silicon-based anisotropic magnetic film non-contact magnetic field sensing device which comprises an organic glass probe, a rotating table, a steering engine, a support, a solar panel, a rear-end waterproof box and a fixed base which are sequentially combined from top to bottom. Magnetic field components at different angles are obtained through the variable attitude angle scanning mechanism, so that the optimal sensing angle is selected, measurement errors caused by installation attitude deviation, structural tolerance and environmental disturbance can be effectively eliminated, the reliability and stability of the system in outdoor long-term operation are remarkably improved, and the reliability and stability of the system in outdoor long-term operation are improved. The magnetic field of the wire is sensed in a non-contact mode, the light-weight probe and the movable fixing support are matched, fixation can be directly carried out below the measured wire, the installation process is simple, convenient and rapid, and the device is very suitable for the rapid arrangement and temporary monitoring requirements of an electric power field.

A magnetic thin film laminated structure includes a first layer structure and a second layer structure stacked on the first layer structure. The first layer structure includes an adhesive layer on a substance, the adhesive layer being made of a material having compressive stress, at least one pair of layers on the adhesive layer, each pair of the at least one pair of layers including a magnetic film layer and an isolation layer, and an additional magnetic film layer on the at least one pair of layers. The second layer structure includes another adhesive layer on the first layer structure, another at least one pair of layers on the another adhesive layer, each pair of the another at least one pair of layers including a magnetic film layer and an isolation layer, and another additional magnetic film layer on the another at least one pair of layers.

To provide an aluminum alloy sheet for a magnetic disk, an aluminum alloy sheet blank for the magnetic disk, and an aluminum alloy sheet substrate for the magnetic disk, having satisfactory rigidity and capable of suppressing thermal deformation during magnetic film sputtering.SOLUTION: An aluminum alloy sheet for a magnetic disk, comprising: 0.1 to 7.0 mass% of Mg; 0.005 to 1.0 mass% of Cr; 3 to 100 mass ppm of Be; 0.20 mass% or less of Si; 0.05 to 5.9 mass% of at least one or more of Fe, Mn, and Ni in total; and a balance of Al and impurities.SELECTED DRAWING: None

The invention relates to a novel moving magnet type electromagnetic MEMS micromirror and a manufacturing method thereof.The novel moving magnet type electromagnetic MEMS micromirror comprises a coil platform and a coil, a mirror surface structure comprises a mirror surface body and a magnet arranged on the upper surface of the mirror surface body, the magnet is arranged above the coil, and the mirror surface body comprises a frame and a mirror surface platform arranged in the frame; the mirror surface platform is connected with the inner wall of the frame through the rotating shaft; the magnet and the coil are used for driving the mirror surface platform to realize two-dimensional deflection; according to the MEMS electromagnetic micro-mirror, electromagnetic force is provided for deflection of the mirror surface through cooperation of the magnet and the coil, and the problems of low magnetic energy density, poor thermal stability and low durability caused by deposition of a magnetic film on the mirror surface of a traditional MEMS electromagnetic micro-mirror are solved. By integrating the Hall device, the problem of real-time measurement of the rotation angle of the mirror surface is solved. In addition, a high-quality large-size mirror surface is manufactured, the problems that a traditional fast reflecting mirror is large in mass and low in integration degree are solved, and the problems that fast reflecting mirrors in other MEMS driving modes are small in deflection angle and small in mirror surface size are solved.

The invention discloses a rare earth doped iron-cobalt-based soft magnetic thin film material as well as a preparation method and application thereof. The chemical formula of the components of the rare earth doped iron-cobalt-based soft magnetic thin film material is (Re2Co17) x (Fe0. 65Co0. 35) 1-x, in the formula, Re is at least one of lanthanide elements, scandium and yttrium, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 And x is less than or equal to 0.2. The preparation method of the rare earth doped iron-cobalt-based soft magnetic thin film material comprises the following steps: carrying out double-target magnetron sputtering by adopting a Re2Co17 target material and a Fe < 0.65 > Co < 0.35 > target material, and then carrying out heat treatment. The rare earth doped iron-cobalt-based soft magnetic thin film material has the advantages of high cut-off frequency, high resistivity, small magnetic loss and the like, has excellent high-frequency soft magnetic performance and static magnetic performance, is suitable for being applied to a high-frequency working environment, is simple in preparation process and low in production cost, and is suitable for large-scale industrial production and application.

The application discloses a visual tactile sensor, an electronic skin and a robot, relates to the field of sensors, and aims to improve the comprehensiveness and sensitivity of force detection. The sensor comprises a magnetic film covering the top surface and the side surface, which is made of mixed magnetic powder and silicone rubber; a support supports the magnetic film, a magnetic display card and a light source are arranged in the support, the magnetic sensing data and the display data of the magnetic film under force are collected by a visual tactile collector, and a multi-modal pressure detection model is used for analyzing the force position and / or the force size. The application has high force detection sensitivity, can realize comprehensive detection of the top surface and the side surface, and has high detection precision.

The application discloses a four-stage paddle thrombus-removing micro robot, a preparation method and a magnetic field driving thrombus-removing micro robot system, relates to the technical field of micro robots, and comprises a conical drill bit, a main straight rod and a four-stage paddle group, wherein the conical drill bit is made of a biodegradable material; the bottom of the conical drill bit is connected with the main straight rod; the main straight rod is internally provided with a thrombolytic drug; the four-stage paddle group is arranged on the outer circumferential surface of the main straight rod in an axial direction; the paddle group comprises three paddle blades which are centrally symmetrical to the axis of the main straight rod; the paddle blades in the adjacent two-stage paddle groups are arranged in a staggered manner; the paddle blades are of a round head structure; the thickness of the paddle blades gradually increases from outside to inside; and the surface of the micro robot is coated with a magnetic film and is subjected to directional magnetization treatment. The application can obtain strong movement ability and stable movement state under the accurate control of a movement system, realizes intravascular drilling and crushing of a thrombus, and can biodegrade and release the thrombolytic drug after surgery, so as to solve the problem of downstream vascular embolism after drilling.

The present application relates to a kind of orientation method of two-way plate fiber using magnetic film material, mainly a kind of two-way plate fiber control method using magnetic film material applied to maintenance formwork concrete curing forming device, including the magnetic adsorption layer of soft magnetic material such as magnetic film material / silicon steel sheet, curing formwork, power supply, magnetization generator and the like composition of curing forming device.The curing forming device passes through " magnetic film " structure, on the one hand, vertical fiber is turned over during insertion process, on the other hand, when power is connected, magnetization generator generates magnetism, so that magnetic film adsorption layer obtains magnetism, and then the part of steel fiber in mixed slurry is acted, the uniformity of steel fiber dispersion in construction process is improved, the consistency of orientation.The device is simple, the scope of application is wide, the operation method is easy to operate, and it can be reused, the method can improve the mechanical properties of UHPC, innovate UHPC construction technology, and has great promoting significance for large-scale promotion and application of UHPC.

The application belongs to the field of soft magnetic high-entropy alloy materials and magnetron sputtering technology, and particularly relates to a high-entropy soft magnetic film preparation method and film with high resistivity and cutoff frequency, which comprises the following steps: preparing a high-entropy alloy target and a zinc oxide target; selecting a non-magnetic material with high resistivity as a substrate; after cleaning the target and the substrate, performing double-target-position film magnetron sputtering on the target and the substrate by using the high-entropy alloy target and the zinc oxide target; the sample table is provided with multiple substrates, and the high-entropy soft magnetic alloy target and the ZnO target are arranged below; and the high-entropy soft magnetic film and the ZnO composition gradient-induced soft magnetic film are sputtered on the surface of the substrate. The application adopts composition gradient sputtering ZnO to control the film performance, further improves the resistivity, and obtains the high-entropy soft magnetic film with higher cutoff frequency under the action of strong inverse magnetic electric coupling and the large stress-induced Hk.

The application discloses a three-dimensional force-temperature dual-mode tactile sensor based on a magnetic film. The sensor comprises a graphene-silica gel elastomer, a thermocouple, a magnetic film, an elastomer support, a wrapping body, a Z-axis TMR element and a flexible printed circuit board. Three Z-axis TMR elements are distributed in a right angle shape on the flexible printed circuit board. The wrapping body covers the flexible printed circuit board and wraps the Z-axis TMR element array. Five elastomer supports are distributed in a five-point plum blossom shape on the wrapping body. The graphene-silica gel elastomer is fixed on the five elastomer supports. The graphene-silica gel elastomer wraps the magnetic film and the thermocouple, and the thermocouple is located above the magnetic film. The tactile sensor has the characteristics of low hysteresis, high resolution, high sensitivity, easy decoupling and multi-function, and can realize the dual information perception of the external three-dimensional force and temperature.

The present application belongs to the field of magnetic functional materials and components, and relates to high-frequency electromagnetic interference suppression technology, in particular to an integrated thin film noise suppressor. The present application divides the magnetic thin film into layers, integrates multiple layers of soft magnetic thin film on the transmission line through the isolation of the insulating layer, realizes the suppression of noise through the magnetic loss of the soft magnetic thin film, and can form an integrated thin film noise suppressor with single frequency point or multiple frequency points in the frequency range of 0-6GHz. The present application provides an optional scheme for further satisfying wideband electromagnetic noise suppression by adjusting the type or thickness of the magnetic film material according to actual needs. The present application has the advantages of simple structure and process, integrability, high performance, wide frequency band and high applicability.

The invention belongs to the technical field of biomedical instruments, and particularly relates to a flexible magnetic modified wearable piezoelectric repair tooth socket. Comprising a flexible carrier and a functional composite layer, the flexible carrier serves as a substrate, and the functional composite layer is arranged on the flexible carrier; the functional composite layer comprises a first PU packaging layer, a first magnetic film modification layer, a piezoelectric functional layer, a second magnetic film modification layer and a second PU packaging layer which are sequentially arranged from top to bottom. According to the piezoelectric functional layer, parameters such as the occlusion pressure range, the flexible structure design and the action area can be comprehensively adjusted according to the actual application scene, the target output voltage value is achieved, and personalized customization is supported. And by introducing the magnetic film mutual exclusion layer, the stability of the piezoelectric device is improved.

The present invention provides a high-performance AlNiCo composite thin film material for magnetic code disks and its preparation method, relating to the field of magnetic materials technology. The material comprises: a base layer and a non-magnetic / ferromagnetic composite multilayer thin film deposited on the base layer; the thin film comprises at least multiple AlNiCo films, an intercalated metal film, and a protective metal film. The present invention enables the AlNiCo film to meet the performance requirements of both a high-magnetic film and a non-magnetic buffer layer. The preparation method of the thin film material is simple, high-performance, and low-cost, providing a scientific basis and innovative ideas for the preparation and application of thin-film magnetic code disk materials.

The present invention discloses a magnetically guided sampling capsule robot and a sampling method, which relate to the technical field of capsule robots. A first capsule shell and a second capsule shell interlock to form an internal cavity. An internal magnet is located in the internal cavity. A first soft magnetic film and a second soft magnetic film are located on either side of the internal magnet. In the absence of an external magnetic field, the first soft magnetic film and the second soft magnetic film both protrude toward the internal magnet. A first sampling hole is provided on the first capsule shell, forming a first sampling cavity between the first capsule shell and the first soft magnetic film. A second sampling hole is provided on the second capsule shell, forming a second sampling cavity between the second capsule shell and the second soft magnetic film. The present invention is used for sampling gastric fluid and / or mucosa at a lesion site, can achieve anchored sampling under the action of an external magnetic field, and can achieve a single gastric entry and multiple sampling operations through the design of the symmetrically arranged first and second sampling cavities.

A soft magnetic resin composition includes a solid content containing flat soft magnetic particles and a resin component, and a dispersion medium. Furthermore, a viscosity (A) at a shear rate of 38.1 s-1 is 300 mPa·s or more. Furthermore, a ratio (A / C) of the viscosity (A) at a shear rate of 38.1 s-1 with respect to a viscosity (C) at a shear rate of 191.5 s-1 is 1.7 or more.

The invention discloses a gallium oxide-based transverse FinFET (FinFET) device with high electron mobility, which mainly solves the problems of small channel mobility and large on-resistance and thermal resistance effects of the existing similar devices. The device comprises a substrate (1), a barrier layer (2) and a channel layer (3) from bottom to top, the channel layer (3) adopts a Fin structure, a source electrode (4) and a drain electrode (5) are respectively arranged at two ends of the channel layer (3), and a gate dielectric layer (6) and a gate electrode (8) are arranged between the source electrode and the drain electrode; a magnetic thin film layer (7) is arranged on the gate dielectric layer corresponding to the groove between the Fin channel layers and is used for providing magnetic field force in a channel and applying Lorentz force from bottom to top to moving electrons, so that the channel electrons perform directional movement under the synergistic effect of the Lorentz force and the electric field force, the probability of electron collision and scattering is reduced, and the performance of the device is improved. And the carrier mobility of the device is improved. Under the condition that the process complexity is not increased, the on resistance and the thermal resistance effect of the device can be effectively reduced, and the device can be used as a power electronic device.

The utility model discloses an infant powdering device, and relates to the technical field of infant nursing, in particular to an infant powdering device which comprises a dust cover, a movable rod, a powder puff, a limiting mechanism, a sleeve, a reset spring, a pull ball, a metal elastic piece, a magnetic attraction soft piece and a plastic supporting piece. A limiting mechanism is arranged between the movable rod and the sleeve, a reset spring is arranged in the sleeve, a metal elastic piece is arranged at the lower end of the movable rod, a magnetic attraction soft piece is arranged on the lower side of the metal elastic piece, a plastic supporting piece is arranged on the lower side of the magnetic attraction soft piece, and a powder puff is arranged on the lower side of the plastic supporting piece. Compared with the prior art, the baby talcum powder feeding device has the advantages that the injury to the respiratory tract of a baby caused by flying of talcum powder during powdering is prevented; and the uniform powdering force is ensured.

The application provides a super-clean corrugated pipe pump cavity health state monitoring method and system, comprising the following steps: S1: a marking step, a magnetic film is pasted at a preset position of the corrugated pipe as a magnetic film marking point; S2: a magnetic flux density value acquisition step, when the corrugated pipe is in a compressed state, a magnetic flux density signal generated by excitation of the magnetic film is synchronously collected through a magnetic sensor, and the magnetic flux density signal is processed to obtain a magnetic flux density value; S3: a strain prediction value acquisition step, the magnetic flux density value is taken as input, and a trained LSTM neural network prediction model is processed to output a corresponding strain prediction value; and S4: a health state judgment step, the strain prediction value is compared with a preset strain threshold value to judge the current health state of the corrugated pipe. Compared with the prior art, the application has the advantages of non-contact, high-precision monitoring and the like.