43 results about "Extensometer" patented technology

The invention discloses a method for testing compression performance through a testing machine, which comprises the following specific steps: placing a sample on the upper end surface of a compression main body, and enabling two end surfaces of the sample to be parallel; after the extensometer is fixed, the testing machine is reset, and the extensometer is reset; starting the testing machine for compression, synchronously acquiring sample load data and average deformation data on two sides by the extensometer, transmitting the data into the testing machine, generating a stress-strain curve by the testing machine, and reading the compression yield strength, the compression elastic modulus and the compression strength from the curve. The extensometers on the two sides are directly hung between the upper cover and the compression main body to form a closed symmetrical measurement chain, so that knife edges on the two sides are located in the same rigid frame, bending deformation is offset, the reading difference is reduced to one tenth of the original value, meanwhile, a load line and a measurement line coincide, a secondary force transmission path is avoided, and the measurement accuracy is improved. And the flexibility of the rack only affects the overall displacement without changing the relative deformation in the gauge length of the extensometer, so that the repeatability of the elastic modulus is remarkably improved.

The utility model discloses a metal material constant load testing device suitable for a hydrogen environment, which comprises a high-pressure gas storage bin, the high-pressure gas storage bin is hermetically connected with an upper bin cover and a lower bin cover, the upper bin cover is provided with a gas inlet pipeline, the lower bin cover is provided with a gas outlet pipeline, the high-pressure gas storage bin is filled with hydrogen, the upper bin cover is provided with an upper loading rod, and the lower bin cover is provided with a lower loading rod. The upper end of an upper loading rod is connected with a loading head, the lower end of the loading rod extends into the high-pressure gas storage bin, a load sensor is installed on the upper loading rod, a lower loading rod is arranged on the lower bin cover, the upper end of the lower loading rod extends into the high-pressure gas storage bin, the lower end of the lower loading rod is connected with a base, the lower end of the upper loading rod is provided with an upper connector, and the upper connector is connected with a lower connector. A lower connector is arranged at the upper end of the lower loading rod, a constant-load sample is connected between the upper connector and the lower connector, an extensometer is mounted on the constant-load sample, and a temperature sensor and a pressure sensor are mounted in the high-pressure gas storage bin. According to the utility model, a high-pressure hydrogen test environment can be effectively provided, and the performance test of a metal material under a constant load is realized.

The application discloses a kind of coal rock nonlinear fracture propagation length quantitative determination method based on multiple parameters, comprising: preparation of coal rock sample containing notch;Spray black and white speckle on the surface of sample, install acoustic emission sensor, clip type extensometer and displacement sensor;Carry out three-point bending peak after cycle loading and unloading fracture experiment, record load, crack opening, force point displacement, acoustic emission waveform and DIC image;Through COD-P and LPD-P curve calculation mechanics flexibility, back calculation to solve stress constraint crack length;From acoustic emission positioning, obtain the spatial distribution histogram of breakage dissipation energy, combined with DIC horizontal displacement gradient threshold cloud picture, determine equivalent crack tip and length;Further calculate coal rock fracture process zone length, and intuitively show nonlinear fracture propagation path.The application provides a kind of crack dynamic change quantitative determination method based on mechanics flexibility-displacement gradient-energy dissipation distribution multiple physical parameters, reduce the influence of human subjective consciousness, and the measurement result is accurate and reliable.

This invention provides a method and apparatus for testing the mechanical properties of bolted composite materials in a single shear test, relating to the field of material testing and analysis. The method includes: calculating pixel equivalents and establishing a displacement conversion relationship between image displacement and actual physical displacement; adjusting the front and rear positions of the first extensometer clip and / or the second extensometer clip using positioning screws based on the spot deviation; activating the extensometer and high-speed camera to acquire extensometer displacement data sequences and tracer point sequence images, performing image displacement conversion processing on the sequence images to obtain a high-speed camera displacement data sequence; calculating the displacement deviation between the extensometer displacement data sequence and the high-speed camera displacement data sequence to generate a corrected extrusion deformation; and calculating the mechanical property parameters using real-time load, the corrected extrusion deformation, and preset specimen geometric parameters. This achieves high-precision measurement of extrusion deformation and automatic calculation of multi-dimensional mechanical property parameters in a single shear test.

The invention belongs to the field of mechanical property detection of metal materials, and particularly relates to a method for measuring a stiffness coefficient of a tensile testing machine, which comprises the following steps of: 1) room-temperature tensile test: measuring the value of elastic modulus E1 of a tensile sample according to the scale length by using an extensometer; stopping the test at the proportional elasticity stage of the tensile sample; unloading the tensile sample; (2) the tensile testing machine adopts the cross beam platform to carry out the room-temperature tensile test again by using the tensile sample according to the scale distance length, and the elastic modulus E2 is measured; and 3) calculating the stiffness coefficient K of the tensile testing machine according to the elasticity modulus values measured twice. The method has the advantages that the stiffness coefficient of the high-rigidity tensile testing machine can be accurately, simply and conveniently measured, and quantitative separation and measurement of linear deformation of the testing machine are realized through twice elastic tensile tests of the same sample.

The invention provides a damping steel tensile test method, which relates to the technical field of metal material performance detection, and comprises the following steps: a testing machine adopts automatic program control, the initial tensile speed is set to be 1-5mm / min, a displacement control mode is adopted, hysteresis loop method cyclic tensile is performed for the first time, the target strain point of a first extensometer is set to be 1%, and the target strain point of a second extensometer is set to be 1%; the lower reverse point of the lag loop is 5-10 MPa, and the load holding time is 10-20 s; the strain is accumulated in sequence, the target strain point of the extensometer in each cyclic stretching is increased by 1%, the stress is unloaded to 5-10 MPa after the target strain point is reached each time, and loading is carried out again after the load is kept for 10-20 s until the sample is fractured; extracting stress-strain original data of each time of cyclic stretching, and performing data superposition on the original data extracted each time to form a stress-strain curve of cyclic stretching; and according to the stress-strain curve, analyzing the mechanical property and damping property change of the damping steel under cyclic loading.

The utility model discloses a steel bar residual stress deformation detection device which comprises a detection box, temperature adjusting mechanisms used for adjusting the internal temperature of the detection box are arranged on the two corresponding inner walls of the detection box, a box door is arranged on the surface of the detection box, and a first fixing mechanism is arranged at the bottom of the inner wall of the detection box. A hydraulic cylinder is fixedly installed at the top of the detection box, the end of a piston rod of the hydraulic cylinder extends into the detection box to be connected with a second fixing mechanism, a to-be-detected steel bar is arranged between the first fixing mechanism and the second fixing mechanism, and an extensometer used for detecting residual stress deformation is arranged on the outer side of the to-be-detected steel bar. Mounting boxes are symmetrically fixed to the bottom of the inner wall of the detection box, the temperature in the detection box can be adjusted through combination of the semiconductor chilling plate and the two-way fan, temperature adjustment can be achieved by controlling the fan at the refrigerating end or the heating end, the detection process can be conducted in different temperature environments, and the detection efficiency is improved. The stress deformation performance in the actual working condition is simulated.

The application discloses a kind of test device and test method for measuring the deformation of plate specimen by displacement meter, the device includes displacement meter, mounting frame and connecting device;Mounting frame is composed of upper U-shaped component and lower "I" shaped component, and is connected with the plate specimen to be measured by C-shaped clamp;Displacement meter is symmetrically bound on U-shaped component by rubber band, and top rod is pre-pressed against "I" shaped component.The application adopts separate fixing mode, effectively fixes displacement meter along the force direction, solves the problems that extensometer of plate specimen is not easy to fix and magnetic table base is easy to slide.The device can adapt to plate pieces of different lengths, is easy to disassemble and assemble, symmetrical arrangement can reduce error, improve the accuracy and efficiency of plate specimen tension and compression deformation test.

To provide a video type non-contact extensometer that can easily and accurately adjust a position of a camera so that a distance between the camera and a specimen is a predetermined distance regardless of an operator.SOLUTION: A video type non-contact extensometer comprises a camera that photographs a specimen marked with marked lines at predetermined intervals. The video type non-contact extensometer measures the elongation of the specimen from the displacement of the marked lines based on photographic data photographed by the camera in a state where the position of the camera is adjusted so that a distance to the specimen becomes a predetermined distance. The video type non-contact extensometer comprises a rangefinder that is provided integrally with the camera and measures the distance to the specimen in a non-contact manner.SELECTED DRAWING: Figure 3

This invention belongs to the field of strain measurement technology and discloses an automatic calibration device and method for single-axis and dual-axis extensometers. The device includes a cross-shaped guide rail mounted on a base plate. The two straight tracks of the cross-shaped guide rail are divided into a first section and a second section by their perpendicular intersection. The first section is equipped with a closed-loop stepper motor, a motor connecting shaft, a moving slider, and a moving extensometer connecting shaft. The second section is equipped with a fixed slider, a locking bolt, and the extensometer connecting shaft. The fixed extensometer connecting shaft cooperates with the moving extensometer connecting shaft to fix the extensometer. The closed-loop stepper motor is connected to a host computer for signal transmission. When working synchronously, it can calibrate dual-axis extensometers; when working independently, it can calibrate single-axis extensometers. The two closed-loop stepper motors can work together in both phases and opposite phases, and can also calibrate dual-axis extensometers in proportional or non-proportional conditions. Therefore, this invention has the characteristics of high accuracy, strong adaptability, simple operation, and flexible application.

The utility model discloses a hydrogen fuel cell carbon paper deformation detection device which comprises a universal testing machine, an experiment pressing block, an experiment cushion block, a polar plate carbon paper stacking structure, a video extensometer, a concentrated light source and a microscope, the polar plate carbon paper stacking structure is arranged between the experiment pressing block and the experiment cushion block, and the universal experiment machine is configured to provide continuously changing packaging force and uniformly transmit the packaging force to the polar plate carbon paper stacking structure through the experiment pressing block and the experiment cushion block, namely, the mechanical environment of carbon paper in a galvanic pile is simulated; the concentrated light source is configured to provide brightness, and the video extensometer and the microscope are configured to observe the form change of the carbon paper in the polar plate carbon paper stacking structure after continuous stress. The device simulates the in-pile mechanical environment through the universal testing machine, and directly observes the real form change of the carbon paper in the flow channel through the optical detection technology, thereby being beneficial to improving the cognition on the internal structure of the electric pile and guiding the design of the electric pile.

The invention belongs to the technical field of pipeline tests, and particularly relates to a high-temperature stress endurance testing device for an aviation pipeline connecting piece. The device comprises a tensile testing machine, a high-temperature environment box and a video extensometer, the tensile testing machine comprises a stand column and an upper moving platform sliding on the stand column, the upper moving platform is connected with an upper straight-through connector of a pipeline test piece through an upper switching unit, and a transverse plate at the bottom end of the stand column is connected with a lower straight-through connector of the pipeline test piece through a lower switching unit. Hydraulic oil flow channels are arranged in the upper adapter unit and the lower adapter unit, one end of each hydraulic oil flow channel is connected with a pipeline of the pipeline test piece, and the other end is connected with the pump set unit; the high-temperature environment box sleeves the pipeline test piece and is used for providing a high-temperature environment; the video extensometer is located outside the high-temperature environment box and collects deformation data of the pipeline test piece in the test process through a transparent temperature-resistant glass window of the high-temperature environment box. The application can more accurately simulate and reproduce the use condition of the aviation pipeline piece in the high-temperature environment.

This invention provides a convenient temperature-resistant installation device for a dynamic extensometer, relating to the field of material mechanical property testing technology. It includes: a hollow, fixed housing with a first mounting hole on its first side wall and rectangular slots on its opposite second and third side walls; an extensometer blade with a second mounting hole to fix the fixed housing and the blade to both sides of the extensometer; and a spring clip formed from a single-piece, heat-resistant, elastic metal plate, comprising a V-shaped fixing arm, a U-shaped clamping arm, and a transition section. The V-shaped opening of the fixing arm is opposite to the U-shaped opening of the clamping arm, and they are smoothly connected by the transition section to form the spring clip. The fixing arm is inserted into the rectangular slot of the fixed housing, and the clamping arm is used to clamp the test piece. This invention achieves reliable installation of the extensometer at different test temperatures. The device is easy to operate, highly stable, safe to use, and has high measurement accuracy and versatility.

The utility model relates to composite material detection technical field especially is related to a kind of fiber tensile modulus test tool, including base, vertical moving mechanism is equipped on base, and the moving part of vertical moving mechanism is installed with horizontal mounting bracket;Horizontal mounting bracket includes the first mounting bracket slidable connection with the moving part of vertical moving mechanism, and the first mounting bracket one end extends with second mounting bracket, and extensometer is slidably installed on second mounting bracket;The top surface and bottom surface of second mounting bracket are both equipped with inserting slot, further including the telescopic plate installed in the outer side of second mounting bracket, and the top and bottom of telescopic plate are respectively fixed with multiple inserting rods, and each inserting rod is slidably inserted with each inserting slot;Further including compression spring, and the both ends of compression spring are respectively fixed with the outer side of second mounting bracket and the inner side of telescopic plate;The utility model installs extensometer on horizontal mounting bracket, and the weight of extensometer is supported using tool body, avoid the influence of extensometer deadweight on detection result.

The present disclosure describes systems and methods to compensate for error in a video extensometer system, including noise, perspective variations, and / or component placement and / or operation.

This invention proposes a method for testing the compressive strength of carbonized seawater sand concrete, comprising: preparing seawater sand concrete specimens and carbonizing them until fully carbonized; preloading and then unloading the specimens on a testing machine, followed by displacement-controlled loading; collecting data through strain gauges during the ascending phase, and switching to a displacement extensometer to collect deformation during the descending phase when the load reaches 70-80% of the peak load, while simultaneously reducing the loading rate until the specimen is completely destroyed; performing dimensionless processing on the two data segments, and using a two-segment model of polynomial ascending phase and rational fractional descending phase for least squares fitting to construct a full-curve constitutive relationship, effectively solving the data discontinuity problem caused by strain gauge detachment during the descending phase of highly brittle materials; the obtained model has a high goodness of fit and the physical meaning of the parameters is clear.

The application provides a lightweight multi-axis extensometer support. The lightweight multi-axis extensometer support comprises a support column, a connecting plate is slidably arranged on the side wall of the support column, magnetic attraction blocks are fixedly connected to both ends of the front side of the connecting plate, a rotating shaft is fixedly connected to the front side of the connecting plate, and a self-locking L-shaped cantilever frame is rotatably arranged on the surface of the rotating shaft through a first locking structure. The lightweight multi-axis extensometer support provided by the application can realize quick movement in three directions of rotation, height lifting and forward and backward movement, and can be locked and fixed after reaching the position, so that displacement does not occur in the use process. The lightweight multi-axis extensometer support has a rotation angle positioning and adjusting function, and the L-shaped cantilever frame can be tightly fixed through the magnetic attraction blocks after reaching the position. The integrated fine adjustment function cooperates with the reliable locking device, so that the quick, accurate alignment and stable fixation of the space position of the extensometer mechanism can be realized.

The invention belongs to the field of metal material testing, and particularly relates to a room-temperature tensile testing method for replacing an extensometer, the position of a cross beam platform is changed, so that the distance between clamps is larger than the actual distance between the clamps, and the rigid strain of a testing machine in the loading process is counteracted by using the difference between the two. The method has the advantages that the dependence on the extensometer is completely eliminated through mathematical modeling and rigidity compensation of the testing machine; firstly, a shoulder-free strip-shaped sample is combined with high-precision milling or grinding, so that the size consistency of the sample is ensured; secondly, setting the distance between clamps to be equal to the gauge length of the sample and introducing a beam platform position correction formula to accurately offset the elastic deformation of the testing machine in the loading process, so that the real strain of the sample is reversely deduced by directly utilizing beam displacement data, and a stress-strain curve is drawn according to the real strain; therefore, various parameters related to linear deformation and overall deformation can be accurately measured.

The invention discloses an extensometer with an automatic dropping function and a method, a lower measuring arm (3) and an upper measuring arm (4) respectively extend out of the side edge of an extensometer main body (2), and the end parts of the lower measuring arm and the upper measuring arm are respectively connected with a lower elastic clamping jaw (5) and an upper elastic clamping jaw (6); the lower elastic clamping jaw and the upper elastic clamping jaw are connected through a releasing mechanism. The releasing mechanism comprises a lantern ring (8) arranged on the lower elastic clamping jaw (5) in a sleeving mode, the lantern ring (8) is connected with the bottom end of a vertical rod (9), and the top end of the vertical rod (9) penetrates through the upper elastic clamping jaw (6) and then is connected with one vertex angle of a triangular plate (7). According to the invention, the upper elastic clamping jaw (6) can be driven to be automatically opened by setting a deformation amount or a test force threshold value, so that the extensometer is automatically separated from a tensile test piece when a set condition is met, manual operation is avoided, and the safety and the test efficiency are improved.

The invention discloses a structure multiplexing type sound wave and strain in-situ synchronous measurement device and method. The device mainly comprises a triaxial loading system, an integrated measurement probe pair, a fine tuning screw, a chain type radial extensometer, a temperature control box, a sound wave test system and a data acquisition system. The method comprises the following steps: mounting a sample and a probe, establishing a high-temperature and high-pressure environment through a temperature control and triaxial loading system, synchronously starting a sound wave test system, a strain test system and a data acquisition system, acquiring sound wave signals, overall axial and radial strain and sample end temperature data in real time, and carrying out multi-physical field parameter correlation analysis. The device is reliable in principle and simple and convenient to operate, can realize in-situ synchronous accurate measurement of mechanical, acoustic and thermal parameters of the rock sample under high-temperature and high-pressure conditions, and is suitable for experimental research of simulating rock multi-field coupling characteristics in a complex geological environment.

The invention discloses a strain fine tuning device and method for a high-temperature strain fatigue extensometer, the extensometer comprises a first high-temperature ceramic rod and a second high-temperature ceramic rod which are distributed up and down, and the strain fine tuning device comprises a clamping mechanism, comprising a first support used for being matched with a first high-temperature ceramic rod and a second support used for being matched with a second high-temperature ceramic rod, and the first support is rotationally connected with the second support; and the adjusting mechanism is used for mounting the clamping mechanism and driving the first bracket and the second bracket to relatively swing by a preset angle based on a hinge point between the first bracket and the second bracket so as to act on the first high-temperature ceramic rod and the second high-temperature ceramic rod respectively. The relative angle of the first support and the second support which are rotatably connected is slightly adjusted by the adjusting mechanism so as to act on the first high-temperature ceramic rod and / or the second high-temperature ceramic rod, so that strain fine adjustment of the extensometer in a high-temperature environment is realized, stress response distortion and average stress deviation caused by thermal expansion are solved, and life deviation is avoided.

The invention relates to the technical field of rubber product detection, in particular to a rubber product tensile elasticity detection device which comprises a machine table, a hydraulic driving system is installed on the top of the inner side of the machine table, a top beam is fixedly connected to the bottom of the hydraulic driving system, and a tension sensor is fixedly connected to the bottom of the top beam. The bottom of the tension sensor and the bottom of the inner side of the machine table are each fixedly connected with two clamping piece parts, the rear side of the machine table is fixedly connected with an electronic extensometer, and the front side of a clamping arm of the electronic extensometer is fixedly connected with an outer clamping assembly. According to the tensile elasticity detection device for the rubber product, through the adjustable inclined frame and the screw rod, clamping breakage or loosening of a sheet material can be avoided, a thick part can be reinforced through a puncture cone of an auxiliary part, it is ensured that various samples are stably fixed, and direct detection can be conducted without cutting the samples into standard samples.

The invention provides a corrosion fatigue crack propagation test device, a CT sample and a method, the test device is used for evaluating the corrosion fatigue resistance of a material, the test device comprises a mechanical loading device and a corrosion environment simulation device, the mechanical loading device comprises a fixing assembly, the fixing assembly clamps a part of the CT sample, and the CT sample is placed in the corrosion environment simulation device. A corrosion containing cavity for containing a corrosion solution is formed, and the corrosion containing cavity completely covers a fatigue crack expansion area of the sample; the corrosion environment simulation device, the fixing assembly and the CT sample are matched to form a closed circulation loop of a corrosion solution. The device is suitable for a vertical fatigue test device, can effectively isolate a corrosion solution from an extensometer, ensures continuous immersion of a fatigue crack propagation area, and avoids electrochemical interference.

The invention belongs to the field of metal material testing, and particularly relates to a tensile test method for measuring total extension related indexes without an extensometer, which comprises the following steps of: changing a calculation formula of an abscissa of a tensile test curve on test software of a tensile test machine, and counteracting the rigid strain of the test machine in the loading process. The method has the advantages that the dependence on an extensometer is completely eliminated through mathematical modeling and rigidity compensation of a tensile testing machine, and the tensile property indexes related to the total extension of the tensile sample are accurately measured. Firstly, a shoulder-free strip-shaped sample is combined with high-precision milling or grinding, so that the size consistency of the sample is ensured; and secondly, by setting a calculation formula of a horizontal coordinate of a tensile test curve, the self elastic deformation of the testing machine in the loading process is accurately counteracted, so that the real strain of the test sample is reversely deduced by directly utilizing the displacement data of the cross beam, and a stress-strain curve is drawn according to the real strain, so that various parameters related to linear deformation and overall deformation are accurately measured.

This utility model provides a tooling for measuring deformation in compression creep tests of metallic materials, belonging to the technical field of material testing tooling. It includes a first mounting frame and a second mounting frame coaxially and slidably connected. The second mounting frame has a mounting cavity for accommodating a metal sample. An abutment plate for compressing the metal sample is slidably disposed within the mounting cavity along the axial direction of the second mounting frame, and the abutment plate is connected to the first mounting frame. An extensometer is mounted on the second mounting frame to measure its own movement relative to the first mounting frame to compress the metal sample. This invention improves the convenience of measuring deformation in compression creep tests of metallic samples.

The utility model discloses a non-contact testing device for testing the high-temperature performance of a wire rod, which comprises an environment box and a mounting rod, the mounting rod is arranged at the front part of a box door of the environment box, quartz glass is embedded in the center of the box door of the environment box, two fixing frames are arranged outside the mounting rod, and the fixing frames are fixed on the mounting rod. An adjustable adjusting frame is connected between the two fixing frames, a video extensometer and a green light source are arranged on the adjusting frame, the green light source is arranged on the side edge of the front portion of the video extensometer, an upper chuck and a lower chuck are connected to the upper position and the lower position in the environment box through sleeves respectively, and the upper chuck and the lower chuck are symmetrically arranged. Conical cavities are formed in the upper chuck and the lower chuck, and two wedge blocks are symmetrically embedded in the conical cavities; according to the testing device for non-contact testing of the high-temperature performance of the wire rod, the probability of jaw breaking, slipping and the like in the stretching process of the wire rod can be greatly reduced.

The application relates to the technical field of material strength detection devices, in particular to a gas pipeline material strength detection device and a detection method. The gas pipeline material strength detection device comprises a detection table, a first extensometer and two clamping pieces, the first extensometer is installed on the detection table and located between the two clamping pieces, and the first extensometer comprises a first supporting arm, a second supporting arm, two first clamping wheels and two second clamping wheels. The two first clamping wheels can rotate and are slidably installed on the first supporting arm in the horizontal direction. The two second clamping wheels can rotate and are slidably installed on the second supporting arm in the horizontal direction. When the test piece is fractured, the two first clamping wheels and the two second clamping wheels can be caused to move away from each other by the test piece, the impact of the test piece on the first extensometer is weakened, and the probability of damage of the first extensometer is reduced, thereby providing guarantee for the detection service of the rubber new material in the gas pipeline material.

The utility model discloses a fast calibration fracture mechanics extensometer, which comprises a shell, an adjustable calibration block and a fixed calibration block, a mechanics extensometer structure is arranged in the shell, the mechanics extensometer structure comprises a pressing block, an upper measuring arm is arranged below the pressing block, a lower measuring arm is arranged below the upper measuring arm, an upper measuring arm is arranged below the upper measuring arm, and a lower measuring arm is arranged below the lower measuring arm. A support is arranged under the pressing block. The upper measuring arm and the lower measuring arm deform along with the displacement of a sample notch, the resistance value of a bridge circuit changes, the deformation of the sample is measured through bridge circuit imbalance output, the initial deformation of the measuring arms provides clamping force for the extensometer, the extensometer is matched with the sample notch or a knife edge, other mounting structures are not needed, and when the sample is broken, the extensometer can be automatically separated from the sample; and when the scale distance is increased, the support with an angle is designed, so that the approximate height size of the extensometer is ensured, the size of the extensometer is reduced, the space is saved, and the problem of uncoordinated proportion is avoided.

The present disclosure relates to the field of reliability, in particular to a tensile test method, a tensile test device, a storage medium and an electronic device. The tensile test method comprises: obtaining an attribute parameter of a sample to be tested, and determining a tensile test parameter of the sample to be tested according to the attribute parameter; when the sample to be tested is clamped on a tensile testing machine and a extensometer is clamped on the sample to be tested, performing tensile test on the sample to be tested according to the tensile test parameter; obtaining a deformation amount of the sample to be tested when the tensile test is performed on the sample to be tested; and determining a tensile test result of the sample to be tested according to the attribute parameter and / or the deformation amount. The present disclosure can accurately and quickly obtain the tensile test result of the sample to be tested.

A crane condition monitoring system (10) includes a wheel assembly (50, 70) with a wheel (120) and an axle (160) that defines the wheel's axis of rotation (172). The system also includes several extensometers (208) attached to the axle at circumferential locations around the axis of rotation. The extensometers continuously detect the wheel's deformations. The system further includes a data acquisition system (200) attached to the wheel that receives data from the extensometers corresponding to the detected deformations. The system also includes a main controller (204) attached to the data acquisition system.The main controller receives data from the data acquisition system corresponding to the detected deformations and uses this data to calculate the load applied to the wheel assembly continuously and in real time in a first direction, a second direction perpendicular to the first, and a third direction perpendicular to both.