65 results about "Bending strain" patented technology

The invention discloses an extradosed cable-stayed bridge cable force optimization method, device and system and a storage medium. The method comprises the steps that S1, cable force and bending strain energy training samples of an extradosed cable-stayed bridge are obtained; s2, optimizing SVM parameters under the cable force and bending strain energy training samples of the extradosed cable-stayed bridge by adopting an IGWO algorithm; and S3, taking the cable force value after secondary tensioning as a to-be-optimized parameter, carrying out iterative optimization by using an IGWO algorithm, taking the cable force combination output after evolution of each generation as an input vector of an SVM for nonlinear prediction, outputting a population fitness value under the current cable force, and repeatedly reducing the time cost when the optimization model carries out fitness evaluation so as to improve the fitness evaluation accuracy. And IGWO-based combination optimization is realized. By the adoption of the technical scheme, the calculation efficiency and calculation precision of the finished cable force optimization of the extradosed cable-stayed bridge are improved.

An inertia-based method and system for measuring the bending strain of a pipeline, and a device and a medium. The method comprises: acquiring posture information of a pipeline having a preset length, which posture information is collected by an IMU (S1); performing wavelet transform on the posture information to obtain first target posture information (S2); according to a preset order and a preset window width, performing sliding filtering on the first target posture information by means of a sliding window, wherein one data window is determined each time the sliding window slides on the first target posture information (S3); on the basis of the data windows, determining a fitting coefficient by means of the minimum mean square error (S4); using the value at the central point of each data window as a filtering value, determining a filtering sequence on the basis of the filtering values and the fitting coefficient, and using the filtering sequence as second target posture information (S5); on the basis of the second target posture information, determining a bending strain force applied to the pipeline (S6); and measuring the bending strain of the pipeline on the basis of the bending strain force applied to the pipeline (S7). In the method, noise cancellation is performed twice, thereby improving the accuracy of posture information calculated by an IMU, and solving the problem of the posture information calculated by the IMU being affected by noise.

The invention provides a steel truss arch bridge suspender fatigue damage engineering evaluation method considering a bending effect, which comprises the following steps: firstly, distinguishing load working conditions according to a lane where a train is located and the number of carriages, comprehensively considering the influence of the bending effect, and simplifying the evaluation method by analyzing the influence degree of the transverse position of the train on suspender fatigue damage; then, axial strain epsilon < axial > and bending strain epsilon < bending > data of the shortest suspender under various working conditions are extracted and checked with health monitoring data, the influence of train bending behaviors, lanes where the train is located and the number of carriages on fatigue damage of the shortest suspender is determined, and the fatigue damage of the shortest suspender is determined based on a finite element model; evaluating fatigue damage of all suspenders of the full bridge under various load conditions when the bending effect is considered; finally, according to the accumulated fatigue damage rate, the fatigue damage grade and the maintenance period of the suspender are proposed, the fatigue performance of the steel truss arch bridge suspender is evaluated based on health data and numerical simulation, and a reference basis is provided for daily maintenance of the rigid suspender of the bridge.

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

A method for calculating the in-plane nonlinear deformation of an arch structure with axial defects in a Cartesian coordinate system is presented. This method is based on two states of the arch structure's curve element in the Cartesian coordinate system: an ideal axis and an actual axial defect. It derives the changes in the arc length and curvature of the curve element before and after deformation, obtaining expressions for the nonlinear compressive and bending strains in the in-plane of the arch structure with axial defects in the Cartesian coordinate system. The method also derives the nonlinear equilibrium differential equations in the in-plane of the arch structure with axial defects in the Cartesian coordinate system, obtaining solutions that satisfy the mechanical and geometric boundaries of the arch structure with axial defects. Finally, the method derives the nonlinear equilibrium governing equations in the in-plane of the arch structure with axial defects, ultimately obtaining the solution to the nonlinear mechanical problem in the in-plane of the arch structure with axial defects in the Cartesian coordinate system. This method can obtain the essence of the nonlinear mechanical problem of the arch structure with axial defects in the Cartesian coordinate system, filling the gap in the nonlinear strain-displacement expression for the in-plane of the arch structure with axial defects in the Cartesian coordinate system.

The present invention relates to the technical field of pipeline detection, and discloses a bending strain detection signal system, including: a data acquisition module, used to obtain the factory specification data and usage data of the pipeline to be detected in each detection section; a specification adjustment module, used to compare the initial usage data with the real-time usage data, determine the specification adjustment coefficient according to the comparison result, and obtain the real-time specification data of the pipeline to be detected in each detection section; a bending detection module, used to obtain the leakage magnetic internal detection data using the leakage magnetic internal detection equipment, and determine the bending position and bending value of the pipeline to be detected; a bending warning module, used to determine whether the pipeline to be detected in the detection section has bending strain according to the real-time specification data, and if bending strain occurs, determine whether to issue a bending strain warning according to the bending value and the bending strain threshold. The present application can accurately obtain various data of the pipeline to be detected, improve the accuracy of detection, and improve processing efficiency.

The invention belongs to the technical field of ship construction processes, and particularly discloses a detection method and an adjustment method for the centering state of a shaft system after ship launching, and the detection method specifically comprises the steps: carrying out the detection of the centering state of the shaft system after ship launching through the actual displacement and bearing load of a bearing in the to-be-detected shaft system before and after ship launching; a bearing load change value and an actual displacement change value caused by ship launching are obtained through calculation, and whether the shafting centering state is changed or not after ship launching is determined according to the bearing load change value and the actual displacement change value caused by ship launching; the actual displacement and the bearing load of the bearing in the to-be-measured shafting are obtained by the following steps: collecting the vertical bending strain of the shaft of the to-be-measured shafting at the strain measuring point, then calculating to obtain the actual vertical bending moment at the strain measuring point, and then calculating the actual displacement and the bearing load of the bearing in the to-be-measured shafting. On the premise that the construction difficulty and efficiency are not affected, the quality problem of shafting installation is controlled in the construction stage, and the shafting centering state of the naval vessel after being launched is greatly optimized.

The invention provides a hierarchical mixture design index and optimization method according to functional requirements of different pavement layers (a surface layer, a middle surface layer and a lower surface layer) in combination with climate zoning and traffic load characteristics. According to the method, key mechanical parameters (the dynamic stability of a surface layer is greater than or equal to 6000 times / mm, and the low-temperature bending strain of a lower surface layer is greater than or equal to 2500 mu epsilon) are determined according to the horizon function, and then the mineral aggregate gradation and the special asphalt dosage are optimized through coupling analysis of volume parameters (the void ratio is 3%-5%, and the mineral aggregate void ratio is greater than or equal to 17%) and mechanical properties. And meanwhile, a bonding layer interface shear strength test (greater than or equal to 1.2 MPa) is introduced, so that the structural integrity is ensured.

This invention discloses a stress-reducing fixing structure for a sliding rotor, relating to the field of shaft support structure technology. It includes a rotor body sleeved around the outer periphery of a main shaft. Multiple pressure-relief grooves are spaced circumferentially on the cylindrical wall of the rotor body. These grooves extend radially inward from the inner periphery and spirally along the shaft hole axis, creating a deformation avoidance space within the rotor body. Multiple flexible support arms are formed between adjacent pressure-relief grooves. When the main shaft is heated and generates a radial expansion greater than that of the rotor body, the flexible support arms are radially compressed by the main shaft and undergo elastic bending deformation into the pressure-relief grooves, converting radial displacement into bending strain. This adaptively absorbs and reduces the stress between the main shaft and the rotor body. This invention effectively solves the stress concentration problem caused by differences in thermal expansion coefficients under high-temperature conditions without changing the materials or sacrificing assembly rigidity and rotational accuracy, significantly improving the reliability and service life of the equipment.

The present invention discloses a superconducting strand bending strain precision measuring device, comprising a support frame, a driving mechanism installed on the upper part of the support frame, and the output end of the driving mechanism is connected to a weighing sensor and a pressure transmission module in sequence from top to bottom along the vertical direction; a bending strain module is installed on the lower part of the support frame, and when the output end of the driving module moves downward, it can apply pressure to the superconducting strand placed on the bending strain module through the pressure transmission module. In the superconducting strand bending strain precision measuring device provided by the present invention, the driving force generated by the driving mechanism applies downward pressure to the superconducting strand, and the pressure value is detected by the weighing sensor, which can accurately control the size of the pressure value and realize real-time monitoring; the bending strain module of the present invention has a novel structural design, and the overall bending strain transmission structure is simple, which reduces the transmission error caused by the complex mechanical mechanism, and greatly improves the application accuracy and measurement accuracy of the bending strain of the superconducting strand.

A force sensor is disclosed for the bottom bracket of a bicycle, designed as a hollow cylindrical piece divided into an outer ring with an indentation along the entire perimeter thereof to accommodate a mechanical stop, an inner ring and a central ring with at least four openings disposed around the perimeter and which are positioned such that they form four arms, two identical arms having a larger arc in the vertical axis and two identical arms having a smaller arc in the horizontal axis, with at least one sheer strain gauge placed on each arm having a smaller are and at least one bending strain gauge on each arm having a larger arc. This strain gauge arrangement allows the effective force to be measured by omitting parasitic forces, thereby obtaining precise information regarding the power exerted by a cyclist, which is useful for optimising motors in electric bikes.

The application discloses a rotating machinery friction fault detection method based on a strain test technology, relates to the technical field of friction fault detection, and solves the technical problem of low recognition accuracy of friction faults, and the technical solution is characterized in that the strain test technology is used to convert a bending strain signal into a voltage signal, and the interference of other factors in the vibration signal is avoided. The strain technology has high precision and can reflect extremely tiny thermal bending deformation, and can identify the friction in the early stage. The bending strain of the rotor in the running state is collected, and the change trend is observed, and when periodic fluctuation or divergence occurs, the occurrence of the friction fault can be judged. Meanwhile, the friction range can be roughly judged according to the strain values of different sections, and the diagnosis reference for the rotor friction fault treatment is provided.

The application discloses a kind of ultra-high strength automobile steel plate limit tip cold bending strain calculation method, system and equipment, and it is related to the field of automobile.Based on the relationship between the strain and bending angle provided by the application, the fracture strain under the limit tip cold bending working condition can be predicted according to the measured cold bending angle, so as to quantitatively evaluate the bending resistance of the material according to the cold bending angle-strain relationship.Further, the cold bending angle-strain relationship calculated by the method of the application can be input into the finite element simulation model, and directly used for the fracture toughness evaluation of parts and the CAE analysis of the whole vehicle.The relationship between the strain and bending angle provided by the application only needs to be substituted by the pressing displacement, sheet thickness and cold bending angle to solve the critical fracture strain of the material, that is, through the simple and easy-to-measure cold bending angle parameter, the complex limit tip cold bending fracture strain parameter is obtained, which solves the problem of difficult fracture strain measurement and reduces the equipment investment and time cost of actual production.

The invention relates to the technical field of bridge engineering, and provides a multi-objective intelligent optimization method for finished cable force of a cable-stayed bridge. The multi-objective intelligent optimization method comprises the following steps: establishing a finite element model of the cable-stayed bridge, and primarily homogenizing the cable force by adopting a minimum bending energy method according to a principle that the cable force of a long cable is large and the cable force of a short cable is small; constructing a support vector machine regression small sample proxy model based on a radial basis kernel function, carrying out cross validation and tuning on hyper-parameters by adopting grid search and a leave-one-out method, and representing a mapping relation between cable force and structural responses such as bending moment and displacement; establishing a multi-objective optimization model taking bending strain energy and resultant displacement as optimization objectives; according to the multi-target intelligent optimization method based on the double-optimal strategy, comprehensive optimal cable force and partial optimal cable force are used as guidance, common cable force is guided to approach to two types of excellent cable force, iterative optimization is adjusted through a direction factor and a strength factor, a Pareto optimal cable force candidate set is updated through non-dominated sorting, hypercube grids and a congestion degree strategy, and the optimal cable force is obtained. And finally obtaining a comprehensive optimal cable force as a finished cable force of the cable-stayed bridge.

The invention provides a gravity angle sensor, a calibration method thereof and a gravity compensation method applying the gravity angle sensor, and belongs to the technical field of sensors and intelligent control. The sensor comprises a sensor frame, a flexible spring piece assembly, a mass block and a differential strain measurement unit, the flexible spring piece assembly is symmetrically connected with the mass block and the sensor frame, and the flexible spring piece assembly is configured to generate bending deformation perpendicular to the axial direction of the flexible spring piece assembly under the action of a gravity component; the differential strain measurement units are arranged on the convex side and the concave side when the flexible spring piece is bent and used for detecting the bending strain difference perpendicular to the axial direction. High-precision and real-time gravity compensation under a dynamic working condition is realized by calibrating a maximum strain difference value, measuring a current strain difference in real time, calculating a specific value and directly generating a gravity compensation amount without resolving an attitude angle and breaking through range limitation of a cosine function. According to the scheme, mechanical friction is eliminated, sensitivity and stability are improved, and the method is suitable for high-dynamic force control systems such as robots and precision platforms.

The utility model belongs to mechanical analysis equipment technical field provides a kind of engineering component internal force analysis appearance, the engineering component internal force analysis appearance includes mandrel and multiple component module;Multiple component module is successively sleeved on mandrel and mutually abuts and forms engineering component model, and component module is slidably engaged with mandrel;At least the outer peripheral surface or axial end surface of two adjacent component modules is respectively provided with angle scale stripe and pointer stripe;The outer peripheral surface of each component module is provided with grid stripe.The engineering component internal force analysis appearance provided by the utility model, the position of angle scale stripe is pointed to by pointer stripe, and torsion angle is directly and intuitively shown, and then torsion strain is directly and intuitively shown;When simulating the bending condition of engineering component, component module will turn over outward, and the outer side portion is mutually far away, and then bending strain is directly and intuitively shown.

The application provides a helicopter landing gear landing load measurement method, the method comprises the following steps: pasting at least 10 strain gauges at the wheel shaft position; obtaining the tensile strain, shear strain, bending strain and torsional strain of the strain gauges; determining the heading load, lateral load and / or vertical load when the helicopter landing gear lands based on the tensile strain, shear strain, bending strain and torsional strain of the strain gauges; the application realizes the analysis and calculation of the transmission of the three-directional ground loads to the landing gear wheel shaft during the landing of the helicopter, the reverse derivation process of strain to load is supplemented by the forward derivation of traditional load to strain, the interference of the nonlinear superposition of combined loads on the solution of ground load calculation is eliminated, the position requirement that the strain gauge layout needs to meet the unidirectional load sensitivity is reduced, and good universality is achieved.

The application belongs to the technical field of strain type multi-dimensional force sensor, and discloses a six-dimensional force sensor with four L-shaped elastic beam structures and a strain gauge arrangement method, aiming to solve the core problems of strain dispersion, low sensitivity, serious inter-dimension coupling and large mechanical hysteresis of the existing six-dimensional force sensor. The elastic body is an integral structure, and the core includes an outer circular ring, a central loading platform and four L-shaped elastic beams connecting the two, the four L-shaped elastic beams are distributed at equal intervals of 90 degrees along the circumference of the outer circular ring, and the beam body is mainly subjected to directional bending deformation when loaded, so that a stable strain concentration area can be formed; 12 strain gauges are accurately attached to the maximum bending strain area of the beam body based on finite element simulation, and cooperate with the half-bridge double-working-piece Wheatstone bridge to realize six-dimensional force / torque measurement. The application can effectively reduce the inter-dimension coupling error and mechanical hysteresis, improve the measurement sensitivity and long-term stability, and is suitable for high-precision six-dimensional force measurement scenes such as industrial robot precision assembly, aerospace measurement and control, medical minimally invasive surgery and the like.

The invention relates to the technical field of optical fiber real-time monitoring, in particular to a steel structure platform health monitoring system and method based on optical fiber sensing, and the method comprises the following steps: respectively monitoring a steel beam and a bolt node of a steel structure platform by using an FBG strain sensor and a temperature sensor, and independently monitoring the bending strain of the steel beam by using an FBG curvature meter; after strain and temperature are decoupled, a real strain value is obtained, the steel beam curvature is measured by combining three gratings of a curvature meter, an eccentric threshold value is set, and when the steel beam curvature anomaly exceeds the eccentric threshold value, a steel beam deformation early warning is generated; the pre-tightening force loss rate is calculated by using the real axial strain of the bolt, the node state is dynamically evaluated by combining the curvature anomaly of the steel beam, a yellow alarm and a red alarm are set, maintenance is planned when the yellow alarm is triggered by the loss rate, and emergency disposal is performed when the red alarm is triggered. According to the system and method, thermal expansion and cold contraction errors are eliminated through strain and temperature decoupling, the bending degree of the steel beam is effectively evaluated by means of the FBG curvature meter, safety and stability of the platform are guaranteed, and a maintenance strategy is optimized.

The present application relates to the technical field of bridge engineering, and provides a cable-stayed bridge completion cable force multi-objective intelligent optimization method: a finite element model of the cable-stayed bridge is established, the minimum bending energy method is adopted, and the cable force is initially uniform according to the principle of "long cable force is large, and short cable force is small"; a small sample support vector machine regression proxy model based on a radial basis kernel function is constructed, grid search and leave-one-out cross-validation are adopted to optimize the super parameters, and the mapping relationship between the cable force and the bending moment, displacement and other structural responses is represented; a multi-objective optimization model with bending strain energy and combined displacement as optimization objectives is established; and a multi-objective intelligent optimization method based on a double optimization strategy is used to guide the general cable force to approach the two types of excellent cable forces, the iteration optimization is adjusted through a direction factor and a strength factor, the Pareto optimal cable force candidate set is updated through a non-dominated sorting, a hypercube grid and a crowding degree strategy, and finally a comprehensive optimal cable force is obtained as the cable-stayed bridge completion cable force.

The invention discloses a dynamic bending self-adaptive flexible connection electrophoresis insulation process, and belongs to the technical field of electrical insulation. According to the process, a miniature strain gauge is embedded in the surface of an electrical flexible connection main body, the dynamic bending strain is detected in real time, and the current bending curvature radius is calculated; the control unit dynamically adjusts the electric field intensity of the electrophoresis system according to a preset curvature-electric field mapping relation; the flexible connection main body is arranged in epoxy-silicon dioxide sol, the sol is directionally deposited under the action of an electric field to form an insulating layer, and the thickness of the insulating layer is dynamically adjusted along with the bending curvature radius and is in a negative correlation relationship. Self-adaptive distribution of the thickness of the insulating layer is achieved, the thickness is increased in a violent bending area to resist tensile stress, the thickness is reduced in a smooth area to maintain flexibility, and the insulation reliability and mechanical durability of flexible connection under the dynamic working condition are effectively improved.

An inertial-based method and system for detecting bending strain in a pipeline, a device, and a medium. The method comprises: acquiring position information of a pipeline of a preset length, collected by an IMU (S1); performing a wavelet transformation on the position information to obtain an initial target position information (S2); performing sliding filtering on the initial target position information through a sliding window according to a preset sequence and window width, and determining a data window at each sliding of the sliding window on the initial target position information (S3); determining a fit coefficient by the minimum mean squared error depending on the respective data windows (S4).Using a numerical value at the center of each data window as a filter value, determining a filter sequence based on the respective filter values ​​and the fit coefficient, and using the filter sequence as the second target position information (S5); determining a pipe bending strain force based on the second target position information (S6); detecting the pipe bending strain based on the pipe bending strain force (S7). This method removes noise twice, thereby improving the accuracy of the position information calculated by an inertial measurement unit (IMU) and solving the problem of noise affecting the position information calculated by the IMU.

The invention relates to the technical field of submarine cable bending measurement, and discloses a submarine cable laying curvature measuring device, which comprises a head end annular block and a submarine cable sleeve, and further comprises a connecting mechanism, and the connecting mechanism comprises a plurality of circular connecting blocks and a tail end connecting block which are sequentially arranged behind the head end annular block. Bending strain of the submarine cable is monitored in real time through the fiber grating sensor, wavelength offset is converted into curvature data, seawater in the hollow rubber blocks can generate pressure when the adjacent hollow rubber blocks are in contact due to the fact that the water outlet apertures of the circular water spraying holes are small, and therefore buffering force generated when the adjacent hollow rubber blocks are in contact is increased, and the submarine cable is prevented from being damaged. And the damage caused by rapid bending of the device is further reduced, water sprayed out of the circular water spraying holes correspondingly impacts the outer wall of the submarine cable sleeve, algae and shellfish organisms entering the device from gaps between the circular connecting blocks are removed, and therefore the algae and shellfish organisms are prevented from influencing the submarine cable.

A force detection bone screw device includes a bone screw body, a spring structure, a detection module, and an antenna module. The bone screw body includes a cylinder. The spring structure, the detection module and the antenna module are respectively arranged in the accommodation portion of the column. The spring structure includes a body, a bearing part, a fixing part and at least one bending strain structure. One end of the body is connected to the bearing part, and the other end of the body is connected to the fixing part, and the fixing part is fixed in the cylinder. Each bending strain structure is respectively provided on the body. The body has an axial direction, and each bending strain structure has deformation in at least one direction different from the axial direction. The detection module includes at least one strain element and a sensing component.

According to the present disclosure, an optical cable can be fixed such that the bending strain applied to the periphery of a portion of the optical cable from which an optical fiber is drawn is reduced. This optical panel (100) is provided with: a gripper (13) that grips an optical cable (22); the optical cable connector includes an optical cable (22), and a housing (10) in which an optical fiber (21) led out from the optical cable (22) is routed, the housing (10) is provided with a plurality of attachment portions (16), the gripper (13) has a plurality of fixing portions (46) capable of engaging with the attachment portions (16) of the housing (10), and the number of the attachment portions (16) is greater than the number of the fixing portions (46).

The invention relates to the technical field of intelligent detection, and discloses a bending strain detection system and method based on an IMU module, and the method comprises the steps: collecting pipeline data of a to-be-detected pipeline, and determining an early warning threshold value of a magnetic flux leakage internal detection device; the operation data of the IMU module are collected in real time to determine the operation state of the magnetic flux leakage internal detection equipment, and when the equipment operates in an inclined mode, the operation data are compared with historical operation data to determine a threshold value adjustment coefficient to adjust an early warning threshold value to obtain a bending early warning threshold value; and obtaining a pipeline bending value according to the operation data, obtaining position information of the magnetic flux leakage internal detection equipment based on a positioning module in the IMU module, comparing the position information and the pipeline bending value with model data of the to-be-detected pipeline, and judging whether the to-be-detected pipeline has bending strain or not according to a comparison result. The IMU module and the magnetic flux leakage detection technology are combined, the reliability and safety of pipeline detection are improved, and accurate detection and early warning of the bending strain of the pipeline are achieved.

The application discloses a fiber acceleration detector based on a shape-variable cylinder and a method for detecting vibration acceleration. One end of the cylindrical shape-variable cylinder is used as a mounting end. Three axial grooves are arranged on the side wall of the shape-variable cylinder in a circumferential direction and are distributed at an angle of 120 degrees. An optical fiber with a certain pre-stress is fixed in each axial groove by using glue. A grating is engraved on the optical fiber. The shape-variable cylinder detector is mainly made of silica gel, is easy to deform, has good bending strain performance, and has higher sensitivity than common metal structures under the same conditions. The application has the advantages of convenient production, simple structure and accurate measurement.

The invention discloses a PEEK line-based multidirectional bending strain sensor and a preparation method thereof, the PEEK line-based multidirectional bending strain sensor comprises a sensing layer, a wire and a packaging layer, and the strain sensor part is formed by laser ablation and comprises a sensing layer, a wire, a silver paste layer and a packaging layer; the inner part of the multidirectional bending strain sensor is formed by gluing an inner layer and an outer layer, and the inner sensing layer comprises a PEEK base material layer and a laser-induced graphene conductive layer. And the outer adhesive layer is a packaging layer and is made of polymer resin. The conductive material is arranged on the surface of the PEEK wire, is formed by ablating the PEEK wire by laser, and is connected with the wire by silver paste, and the sensing layer realizes the bending winding degree detection by utilizing the change of resistance. The characteristics of linear light weight and small size are suitable for more environments matched with the mechanical gripper, commercially available glue, PEEK wires, silver paste and conductive materials are used as materials, no extra chemical reducing agent is needed, and the manufacturing process is greatly simplified.

A device for accurately measuring bending strain of a superconducting strand is provided. The bending strain precision measuring device includes a support frame. A driving mechanism is installed on the upper part of the support frame. An output end of the driving mechanism is sequentially connected with a weighing sensor and a pressure transmission module from top to bottom along the vertical direction. A bending strain module is installed on the lower part of the support frame. In a case that the output end of a driving mechanism moves downwards, the pressure transmission mechanism is capable of applying pressure to the superconducting strand placed on the bending strain module.