44 results about "Large strain" patented technology

An optical frequency domain reflectometer with environmental disturbance resistance and large strain measurement capability belongs to the field of distributed optical fiber sensing and comprises an opposite sweep frequency light frequency modulation continuous wave signal generation module, a light splitting device, a modulation device, a circulator, a polarization controller, an optical coupling device, a photoelectric conversion module and a data acquisition and processing module. An optical signal generated by an opposite sweep frequency light frequency modulation continuous wave signal generation module is divided into probe light and local oscillation light through a light splitting device, the probe light is modulated through a modulation device and sent to an optical fiber through a circulator, and a Rayleigh back scattering light signal generated by the optical fiber and the local oscillation light interfere in an optical coupling device to obtain interference light; the photoelectric conversion module mixes beat frequency signals of interference light, and the data acquisition and processing module analyzes and processes the beat frequency signals. According to the invention, the position information of the Rayleigh backscattering point is marked by using the modulated probe light, the Rayleigh scattering signal at the corresponding position is restored, crosstalk between channels is inhibited, and high-precision measurement in a large dynamic range and resistant to environmental disturbance is realized.

According to the balance beam strain-load relation-based hoisting load measurement method, strain-load values of key points of a balance beam are measured to obtain a least square fitting curve of a required working condition, so that the hoisting load of the balance beam is effectively measured. According to the balance beam surface strain hoisting load measuring system provided by the embodiment of the invention, the same strain sensors are respectively arranged at the four position points with relatively large strain of the balance beam, the strain values are acquired, and finally, calculation is performed through a corresponding formula, so that the effect of monitoring the hoisting load of the balance beam in real time is achieved.

The invention relates to a large-strain consolidation algorithm, equipment and medium for horizontal vacuum dehydration of sludge, and the algorithm comprises the following steps: 1, obtaining basic parameters of a constitutive relation of a target soil body through an indoor consolidation experiment and a penetration experiment, 2, obtaining load conditions of the target soil body through surveying a geological exploration report and an engineering design scheme, the method comprises the steps of (1) establishing a one-dimensional PHD consolidation model, (2) establishing a one-dimensional PHD consolidation model and deducing a control equation under equal strain conditions, (3) introducing a virtual time step and calculating the consolidation degree in a manner of carrying out segmented increment processing on time, (4) establishing the one-dimensional PHD consolidation model and deducing a control equation under equal strain conditions, and (5) calculating the final consolidation degree based on the virtual time step and the control equation, and further comprises equipment and a medium. According to the method, the influence of non-uniform consolidation is incorporated into the one-dimensional theoretical consolidation analysis of the Taisha foundation, and the consolidation coefficient is corrected by using the control equation based on the virtual time step and the strain condition, so that convenient and accurate consolidation calculation is realized.

The invention relates to the technical field of flexible sensors, discloses a flexible large-strain sensor, and a preparation method and application thereof, and aims to solve the problems that a traditional sensor is small in measuring range, poor in fitting performance and high in reliability in large-strain monitoring of soft materials such as solid engine grains. And the problems of poor signal linearity and repeatability, complex preparation process and high cost of the existing flexible sensor are solved. Manufacturing a flexible insulating substrate by adopting a polymer film; preparing a conductive film on the flexible insulating base to form a composite film layer structure; according to a preset pattern of the conductive film, laser etching scribing is carried out on the conductive film according to the first type of vector trajectory, only the conductive film is penetrated, a strain resistor and other resistors are segmented, and an off-axis snakelike structure is formed; according to a preset pattern of the flexible insulating substrate, laser etching scribing is carried out on the composite film layer structure according to a second type of vector trajectory, the composite film layer structure is penetrated, and the flexible insulating substrate of the sensor is etched; and welding a leading-out wire on the leading-out electrode and packaging to obtain the flexible large-strain sensor.

The invention relates to the technical field of flexible electronic sensors, in particular to a flexible large strain sensor for crack detection and a preparation method thereof.The flexible large strain sensor comprises a skeleton-shaped packaging layer, the packaging layer comprises two rigid fixing ends, and the two rigid fixing ends are integrally connected through a sensitive unit section; a rigid reinforcing structure is embedded in each rigid fixing end, mechanical fixing holes are formed in each rigid fixing end and the corresponding rigid reinforcing structure in a penetrating mode, interdigital capacitor electrodes are embedded in the sensitive unit sections, and the interdigital capacitor electrodes are made of flexible conductive materials through laser ablation. The end part of the interdigital capacitor electrode is connected with a flexible extension wire, the tail end of the flexible extension wire is connected with an external lead, and the external lead is embedded between the packaging layer and the upper surface of the rigid fixed end; the problems that an existing flexible sensor is unstable in installation, contradictory in measuring range and precision and poor in environmental adaptability in structural crack detection are solved.

The invention discloses a method for improving the strength of a TC4 titanium alloy wire, which comprises the following steps: (1) martensite treatment: heating the TC4 titanium alloy wire to a temperature zone of 800-850 DEG C for heat preservation, and then performing water quenching to obtain an alpha + alpha'martensite initial structure; (2) tissue fibrosis treatment is conducted, specifically, the TC4 titanium alloy wire in the step (1) is subjected to drawing with medium dependent variable, and a fibrous alpha + alpha'drawn tissue is obtained; (3) martensite decomposition treatment is conducted, specifically, the TC4 titanium alloy wire in the step (2) is heated to a temperature zone of 500-600 DEG C, air cooling is conducted after short-time heat preservation, and the alpha + alpha'fibrous structure is decomposed into an alpha + (alpha s + beta) complex-phase fibrous structure; (4) non-continuous accumulated large strain drawing based on defect rearrangement treatment is conducted, specifically, non-continuous small strain drawing is conducted on the TC4 titanium alloy wire in the step (3) for multiple times, large strain drawing is achieved in an accumulated mode, and the wire is heated to 400-500 DEG C between every two adjacent passes for defect rearrangement treatment; and finally, the high-strength TC4 titanium alloy wire is obtained. The TC4 titanium alloy wire treated through the method has the ultra-high strength of 1400 MPa or above, and meanwhile the requirement that the uniform elongation of the wire is 3% or above is met.

The application relates to a flexible strain sensor based on a double-thread conductive yarn and a preparation method thereof. The flexible strain sensor based on the double-thread conductive yarn comprises a core layer elastic yarn, an intermediate layer conductive material and an outer layer packaging material; the core layer elastic yarn is a double-thread yarn, the intermediate layer conductive material comprises a strain sensitive layer and electrodes fixed at two ends of the strain sensitive layer; the double-thread yarn comprises a supporting core yarn and a double-thread structure, and the double-thread structure is two spiral continuous convex structures formed on the surface of the supporting core yarn; the preparation method comprises the following steps: S1, preparing the double-thread yarn; S2, preparing the double-thread conductive yarn; S3, forming two electrodes at two ends of the double-thread conductive yarn; and S4, preparing the flexible strain sensor based on the double-thread conductive yarn. The preparation method is simple and easy to implement, the prepared flexible strain sensor based on the double-thread conductive yarn has a large strain working range, excellent linearity, low hysteresis and good sensitivity.

The invention discloses a waterproof sensor with fine and large strain detection capability. The waterproof sensor sequentially comprises a protective layer, a silver film, a graphene film and a flexible base material from top to bottom, a micro-column structure is arranged on the flexible base material; the graphene film is sprayed on the flexible base material to cover the micro-column structure; the silver film is arranged on the surface of the graphene film in a magnetron sputtering mode to form a conducting layer, and the two sides of the silver film are connected with wires. And the protective layer is poured on the silver film. The sensor prepared by the invention has waterproof capability and fine and large strain detection capability, and can be better applied to human body vital sign monitoring.

The pipeline steel comprises the following components in percentage by weight: 0.051 to 0.09 percent of C, 0.1 to 0.4 percent of Si, 1.5 to 1.9 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.002 percent of S, less than or equal to 0.19 percent of Cu, 0.05 to 0.19 percent of Ni, 0.11 to 0.35 percent of Cr, more than or equal to 0.6 percent and less than or equal to 1.1 percent of Ni + 3Cr, less than or equal to 0.13 percent of Mo, 0.02 to 0.08 percent of Nb, 0.005 to 0.035 percent of Ti, 0.001 to 0.004 percent of Ca, 0.010 to 0.045 percent of Alt, less than or equal to 0.006 percent of N, less than or equal to 0.0003 percent of B, less than or equal to 0.005 percent of O, less than or equal to 0.0002 percent of H and the balance of The method mainly aims at the welded pipe with the wall thickness of 25-40 mm and the caliber of phi 1016-phi 1422 mm, the yield strength of the welded pipe is 555-665 MPa, the tensile strength is larger than or equal to 625 MPa, the-20 DEG C low-temperature impact energy is higher than 1600 J, the-10 DEG C full wall thickness DWTT shear fracture area percentage is larger than 85%, meanwhile, the longitudinal yield strength is 530-640 MPa, the yield ratio is smaller than or equal to 0.85, and the uniform ductility is larger than or equal to 7%.

The invention relates to the field of euphausia superba fishing processing boats, in particular to a stress testing method for an euphausia superba boat trawl truss. Through theoretical calculation and finite element analysis, weak stress points and large strain points of a truss structure are found, a load test method and a stress monitoring method are reasonably planned according to the structural characteristics and stress working conditions of the truss, and after stress and strain data information is obtained through tests, the stress and strain data information is obtained. And comparing the test result with theoretical calculation and finite element analysis, and finally verifying whether the result is consistent or not. Compared with a traditional method, the method has the advantages that the test period is remarkably shortened, and the test cost is reduced; through an accurate strain measurement system and an advanced data analysis means, the authenticity and reliability of a test result are ensured; potential problems of the truss are found in time, prevention and improvement measures are taken in advance, the safety of the truss is improved, and the service life of the truss is prolonged.

The application discloses a preparation method of titanium / titanium alloy wire with a double-gradient structure, which comprises the following steps: (1) performing large-strain drawing on the titanium / titanium alloy wire with a strain of not less than 0.5; (2) performing heat treatment on the drawn wire at a medium-low temperature; (3) performing large-strain torsion on the heat-treated wire with a torsion angle of 3600-20000 degrees to obtain a wire with a gradient increase of strain from a core to an edge along a radial direction; (4) performing heat treatment on the torsioned wire at a medium temperature to obtain a wire with a gradient decrease of ultra-fine grain size from the core to the edge along the radial direction; and (5) performing small-strain torsion on the heat-treated wire with a torsion angle of 720-3600 degrees to obtain the titanium / titanium alloy wire with the double-gradient structure. By obtaining the titanium / titanium alloy wire with a double-gradient heterogeneous structure of grain size and strain, the application greatly improves the strength-plasticity matching of the wire and overcomes the problem that the existing strengthening methods of titanium / titanium alloy result in the deterioration of plasticity of the wire.

Devices and methods for measuring the mechanical properties of soft materials, including biological materials, are disclosed. Embodiments include devices and methods wherein sensors and actuators are collocated with one another reducing complexities and uncertainties of traditional devices with separate sensors and actuators that are merely coupled to one another. Additional embodiments include devices and methods capable of applying large strains during the stimulation and sensing (deformation and measurement) process of determining the mechanical properties, which is some embodiments enables the determination of strain-dependent stiffness and viscoelasticity.

This invention discloses an oil well casing with high strength, high toughness, and large strain performance, and its preparation method, belonging to the field of oil and gas development casing preparation technology. The oil well casing disclosed in this invention, possessing high strength, high toughness, and large strain performance, is micro-alloyed by adding alloying elements Mn, Si, Cr, Ni, Mo, Al, Nb, and V to medium-low carbon, while controlling the content of harmful elements such as P, S, O, H, and N. This ensures that the final composition meets the requirements of oil and gas wells under complex operating conditions for large strain casing. According to relevant experimental results, the yield strength of the oil well casing with the above composition reaches 110 kSi, 125 kSi, and 140 kS, respectively, with a yield strength ratio ≤0.89~0.93 and a uniform elongation ≥15~20%, meeting the practical requirements of oil and gas wells under complex operating conditions.

The present invention discloses an anti-stress whitening transparent polyethylene pipe and its preparation method and application. Through a simple and efficient melt blending and rolling process, UHMWPE with an extremely high molecular entanglement density is introduced into the PE matrix to achieve good miscibility between the two, enhance the entanglement degree between the two-phase molecules, construct a highly molecularly entangled network structure in the blend system and enhance viscoelasticity, endow the PE pipe material with excellent stretchability, inhibit and impede the non-uniform plastic deformation of the pipe during the unidirectional large-strain stretching molding process at room temperature and the chain scission and debonding of the PE and UHMWPE components, significantly reduce the generation of nano-scale cracks and cavities, and further effectively weaken the scattering effect on visible light, eliminate the stress whitening defect of PE, improve the visible light transmittance and optical transparency of the pipe, and have good application prospects in a stress environment.

The invention discloses an additive and subtractive composite manufacturing online monitoring method, which comprises the following steps of: acquiring strain characteristics in an additive and subtractive process by utilizing a monitoring and feedback control system comprising a substrate, a strain gauge, a strain collector, a data processing computer, an additive and subtractive composite forming control system and a motion system; according to the method, real-time monitoring of substrate deformation in the additive and subtractive composite manufacturing process is achieved, whether process adjustment of additive and subtractive composite manufacturing needs to be carried out or not is judged by comparing strain signals with strain signal preset values in a process adjustment database, feedback control is achieved, the local large strain phenomenon in the additive and subtractive manufacturing process can be found in time, and the production efficiency is improved. The method has the advantages of preventing crack defects, monitoring the state of the cutter, optimizing the roughness and dimensional precision of the machined surface, solving the problem of part machining failure caused by hot cracks or low precision in additive and subtractive composite manufacturing, and having wide application prospects and remarkable technical advantages.

This invention belongs to the field of steel production technology, specifically relating to a 1000MPa grade high-strain hydroelectric steel plate and its preparation method. Its chemical composition and mass percentage are as follows: C: ≤0.08%, Si: 0.20%–0.30%, Mn: 0.30%–0.70%, Cr: 0.30%–0.60%, Mo: 0.20%–0.40%, Ni: 2.50%–3.00%, Al: 0.02%–0.03%, Nb: 0.03–0.06%, V: 0.03–0.06%, Ti: 0.01–0.02%, S: ≤0.004%, P: ≤0.015%, with the balance being Fe and unavoidable impurity elements. This invention achieves a microstructure of ferrite, bainite, and retained austenite through rational composition design and control of rolling and online relaxation-rapid cooling processes. By controlling the content of retained austenite and ferrite, a hydroelectric steel plate with low yield strength ratio, high plasticity, and high toughness is obtained.

The present invention provides a method for preparing a large-strain linear double-helix structure flexible capacitive sensor, which relates to the technical field of nanofiber materials. The method comprises: using a water-bath electrospinning method to coat polyamide 6PA6 nanofibers on a conductive core yarn to prepare a nanofiber core-spun yarn; dividing the prepared nanofiber core-spun yarn into two parts, dyeing one part with a neutral dye for color distinction; and winding the dyed fiber core-spun yarn and the white fiber core-spun yarn side by side onto an elastic band to prepare a double-helix structure flexible capacitive sensor. This method solves the problem that, in the prior art, sensors with a strand structure have a relatively small facing area of ​​two electrodes per unit length, resulting in a small capacitance value of the capacitor; and that, in addition, the problem that the sensor has a very small deformation when subjected to external force in both the length direction and the diameter direction, which limits its application in large-strain scenarios.

The invention discloses a hyperelastic material large strain visual measurement method based on surface grid deformation identification, which comprises the following steps: processing a hyperelastic material to be measured into a dumbbell-shaped sample, and constructing uniformly distributed regular grid lines on the surface of a scale distance section of the sample; stretching the sample at a preset stretching rate, and continuously collecting surface grid deformation images of the sample while stretching; identifying the position of each grid line in each frame of image; and according to the position change condition of the corresponding grid lines in the two adjacent frames of images, determining the strain condition of the hyperelastic material at each moment under the preset stretching rate. The invention aims to solve the problems that a traditional measurement method is inaccurate in measurement under the condition of large strain of the hyperelastic material, for example, speckles chapped and deformed in a random speckle sample laying method are difficult to recover, an extensometer cannot obtain local strain and results have uncontrollable factors, and a traditional DIC method is large in measurement error under large strain.

The invention relates to the technical field of bionic artificial muscles, in particular to a bionic artificial muscle with a spiral-crack integrated structure and a preparation method of the bionic artificial muscle. A carbon nanotube dispersion liquid is sprayed on the surface of a spiral liquid crystal elastomer, and a porous carbon nanotube layer with a microcrack network is formed in situ on the surface of the spiral liquid crystal elastomer by utilizing the synergistic effect of rapid volatilization of a solvent and stress release of a matrix, so that the bionic artificial muscle with a spiral-crack integrated structure is prepared. Through the unique spiral-crack integrated structural design, the technical contradiction that high-sensitivity sensing and large-strain driving are difficult to cooperate is fundamentally solved, and organic unification of driving strain amplification, a wide strain range and high linearity is achieved. The artificial muscle prepared by the method has excellent structural stability, actuating performance and strain sensing performance, and has wide application prospects in the fields of soft robots, wearable equipment, intelligent prostheses and the like.

The invention provides a method and equipment for generating a strain-energy curve of a material. The method is applied to material science and engineering fields. The method comprises the following steps: acquiring an original structure of a to-be-processed material; performing mechanical matrix solution on the original structure to obtain Poisson ratios in multiple strain directions; determining a balance structure in each strain direction, continuously increasing the strain by taking the original structure as a starting point for each strain direction, determining a unit cell parameter according to a Poisson's ratio and a current strain value, and determining a balance structure under the current strain until the current strain reaches a preset maximum strain corresponding to the strain direction; obtaining a balance structure under the preset maximum strain in the current strain direction; and acquiring energy under each strain corresponding to each balance structure in each strain direction, and generating a strain-energy curve C1 of the to-be-processed material under the condition of increasing the strain. According to the method, the calculation power consumption is reduced, and the calculation result can be ensured to be a global minimum value without falling into a local minimum value.

This invention provides a method for improving the fatigue life of flexure components in harmonic reducers, belonging to the field of metal microstructure control technology. This invention achieves grain refinement and homogenization, avoids carbides, greatly increases the stability of the retained austenite structure, prevents its decomposition under mechanical driving force during large strain processes, avoids microstructural changes that affect performance stability, eliminates residual stress, and improves the fatigue life of the flexure, enabling it to meet long-life service requirements.

The invention discloses a preparation method and application of a flexible strain sensor based on an SERS (Surface Enhanced Raman Scattering) technology, and belongs to the field of optical strain sensing. The invention aims to solve the technical problems that the current mainstream optical strain sensing technology is limited in measuring range, the precision and the measuring range are difficult to consider at the same time, and the large strain detection requirements of flexible structures such as low-altitude aircrafts are difficult to adapt. According to the flexible strain sensor based on the SERS technology, a compact 4-MBA-Au NPs single-layer film is formed through a three-phase interface self-assembly method, and the compact 4-MBA-Au NPs single-layer film is successfully transferred to the adhesive surface of a VHB adhesive tape with ultrahigh flexibility and elasticity; the prepared sensor can realize 0-24% wide-range strain detection, the measurement precision is + / -2% FS, the limitation of the existing optical sensing technology on the detection range is broken through, and due to the excellent adhesion of the VHB adhesive tape, the sensor can be easily integrated on the surface of a material to be detected, and the sensor has a good application prospect.

The crack sensor based on metal glass large strain range high sensitivity comprises, from bottom to top, an insulating layer, an adhesion layer, a metal glass layer and a crack silver film; the insulating layer is formed by deposition on a strain detection part through a magnetron sputtering mode; the adhesion layer is formed by deposition of metal titanium on the surface of the insulating layer through a magnetron sputtering mode; the metal glass layer is deposited on the surface of the adhesion layer through a sputtering mode; and the crack silver film is prepared by sputtering a metal silver film on the surface of the metal glass layer in a pre-compressed state and releasing the strain to prepare the crack silver film. The crack sensor can be prepared in situ and conformally, has strong adhesion to the substrate, good sensitivity, can effectively convert the generated strain into resistance change, and has great practical production significance.

This invention relates to the field of strain testing equipment technology, and discloses a large strain testing device for pile foundations, including a main component, a support frame, four guide plates fixed to the inner wall of the support frame, a counterweight sliding between the four guide plates, a blocking seat fixed to one side of each guide plate by bolts, a winch fixed to the top of the support frame, a winding rope wound on the winch, and a positioning ring fixed to the support frame; and a connecting component. The beneficial effects of this invention are: by setting up the connecting component, the connecting seat and the locking seat can automatically complete the docking, achieving a stable connection without manual assistance; during release, the limit is released by an electric actuator, enabling fully automated operation, reducing the safety hazards of personnel intervention in heavy object operations, and significantly shortening the test interval time; through the coordinated force of the cable and the connecting rope, it is ensured that the counterweight will not fall off during hoisting, significantly improving the stability and safety of the equipment operation.

The application provides a high-plasticity super-high-grade large-strain pipeline steel and a preparation method thereof, and pipeline steel alloy components are taken as research objects; a warm rolling treatment process is used to refine a structure; and a secondary solute distribution treatment process is combined to obtain a room-temperature residual metastable phase. The final microstructure is fine-grain tempered bainite / martensite+residual metastable complex phase structure, and has the characteristics of fine-grain strengthening and metastable phase plasticizing. The high-plasticity super-high-grade large-strain pipeline steel prepared by the method has the characteristics of high strength and high plasticity, the uniform elongation is 9-15%, the yield strength is higher than 661-738 MPa, the tensile strength is 787-877 MPa, and the yield strength ratio is 0.79-0.85.

The invention provides an input device. The force applied to the shaft portion can be detected with high sensitivity without increasing the amount of strain of the strain body. The input device includes: a shaft portion; a plate-shaped deformation part which is integrally formed with the shaft part and is orthogonal to the axial direction of the shaft part; a plurality of strain detection elements provided in the deformation part; and a detection circuit including: a first measurement circuit that includes some of the plurality of strain detection elements and detects a force applied to the shaft portion in a direction orthogonal to the axial direction; a second measurement circuit that includes other portions of the plurality of strain detection elements and detects a force applied to the shaft portion in a direction orthogonal to the axial direction; a first fixed resistor connected to the power supply voltage side of the first measurement circuit; and a second fixed resistor which is connected to the ground side of the second measurement circuit, and which detects a force applied to the shaft portion in the axial direction on the basis of a voltage between a connection point between the first measurement circuit and the first fixed resistor and a connection point between the second measurement circuit and the second fixed resistor.

The invention belongs to the technical field of aluminum alloy materials, and relates to a high-toughness large-specification aluminum alloy thick plate and a preparation method thereof. The aluminum alloy thick plate has the characteristics of large specification, high toughness and high strength, the strength and toughness of the aluminum alloy thick plate in three directions have the characteristic of low anisotropy, and the aluminum alloy thick plate also has the characteristic of low inter-batch variation coefficient. By designing and controlling the alloy component range of the thick aluminum alloy plate, the component fluctuation of the thick aluminum alloy plate at different parts is greatly reduced, the thick aluminum alloy plate with the uniform alloy internal structure is obtained, and the variation coefficient between batches of the thick aluminum alloy plates is reduced. And meanwhile, the process steps of fusion casting, multi-stage homogenization, large-strain rolling, solid solution quenching, two-stage aging heat treatment and the like are matched, so that the obtained large-specification aluminum alloy thick plate has the characteristics of high toughness, high strength, low anisotropy and good inter-batch stability.

The application discloses an optical frequency domain reflectometer with environmental disturbance resistance and large strain measurement capability, and belongs to the field of distributed optical fiber sensing.The optical frequency domain reflectometer comprises a frequency-modulated continuous wave signal generation module, a light splitting device, a modulation device, a circulator, a polarization controller, an optical coupling device, an optoelectronic conversion module and a data acquisition and processing module.The frequency-modulated continuous wave signal generation module generates an optical signal, which is split into probe light and local oscillator light by the light splitting device.The probe light is modulated by the modulation device and is sent to an optical fiber by the circulator.The Rayleigh backscattering light signal generated by the optical fiber and the local oscillator light interfere with each other in the optical coupling device to obtain interference light.The optoelectronic conversion module mixes beat signals of the interference light, and the data acquisition and processing module analyzes and processes the beat signals.The probe light is modulated to mark the position information of the Rayleigh backscattering point, and the Rayleigh scattering signal corresponding to the position is restored, so that the crosstalk between channels is suppressed, and high-precision measurement with large dynamic range and environmental disturbance resistance is realized.

The invention discloses a strain structure for measuring large strain and a measuring method, and relates to the field of dependent variable measurement, the strain structure comprises an elastic body connected with a measured piece, the elastic body comprises a patch part, two connecting parts and a mounting part, the two connecting parts are symmetrically arranged on the patch part, the mounting part is connected with one side, far away from the patch part, of each connecting part, and the two connecting parts are symmetrically arranged on the mounting part. The mounting part is arranged on the elastic body, the included angle between the connecting part and the patch part is larger than 90 degrees, and the included angle between the connecting part and the mounting part is larger than 90 degrees; a measuring strain gauge is arranged on the patch part, and a standard strain gauge is arranged on the measured piece. Large strain measurement is carried out through cooperation of the measurement strain gauge at the patch beam on the elastic piece and the standard strain gauge, the limitation of a traditional strain gauge in the high strain field can be effectively broken through, a wider measurement range is provided, the reliability and accuracy of measurement are enhanced, and the measurement accuracy can be guaranteed while the measurement precision is guaranteed. And the measuring requirements of various different materials and components are met.