2815results about "Strength properties" patented technology

The invention discloses a hydraulic pressure test tube machine and a tube body clamping centering device, in the tube body clamping centering device, two guide rods and a telescopic oil cylinder are arranged on a base side by side; corresponding ends of the two guide rods are respectively provided with a first sliding block, corresponding other ends of the two guide rods are respectively provided with a second sliding block; a fixed end of the telescopic oil cylinder is fixed on one end of the base, the fixed end of the telescopic oil cylinder is arranged corresponding to the second sliding blocks; a telescopic end of the telescopic oil cylinder is connected with the first sliding blocks, and is used for driving the first sliding blocks to slide along the guide rods, one of two clamping blocks is fixed on the two first sliding block, and the other one of the two clamping blocks is fixed on the two second sliding blocks; the first sliding block on one of the two guide rods is provided with a first rack, the second sliding block on the other one of the two guide rods is provided with a second rack, both sides of a linkage gear are respectively meshed with the two racks, the first sliding blocks and the second sliding blocks are adjusted by the telescopic oil cylinder to move towards each other or depart from each other. The scheme can solve the problems of high control precision and slow regulation efficiency of a plurality of oil cylinders of the tube body clamping centering device.

The invention relates to the field of performance testing of road engineering materials, and discloses an emulsified asphalt in-situ cold-recycled mixture high-temperature creep test method which comprises the following steps: preparing a test piece: presetting an old material-emulsified asphalt standard test piece, and embedding a moisture regulation and control device to generate a controllable gradient; multi-field loading: coupling an unsteady-state temperature field, a moisture gradient field and a time-varying attenuation stress field to construct a composite loading environment; synchronously aligning data: synchronously acquiring macro strain and micropore data, and realizing cross-scale alignment through a space-time matrix; performing parameter inversion: inverting nonlinear constitutive parameters by combining macro and micro data, and constraining a solution space by using a thermodynamic equation; and intelligent termination output: triggering a termination mechanism based on a multi-dimensional criterion and outputting damage evolution data. Through multi-field coupling loading, cross-scale data fusion and intelligent criterion cooperation, the problems of traditional test environment distortion, parameter deviation and criterion lag are solved, and accurate analysis of the high-temperature creep behavior of the emulsified asphalt reclaimed material and reliable prediction of the performance degradation law are achieved.

The invention discloses an on-line monitoring and fault early warning system for the running state of a dynamic compression-shear testing machine, belongs to the technical field of fault diagnosis, and aims to solve the problems of poor adaptability to multiple motion modes, lagging fault early warning and fuzzy fault positioning in the prior art. According to the system, core collaborative link fault sensitive point monitoring parameters are matched according to a current motion mode, a dynamic threshold value is generated to construct a fault judgment threshold value system, real-time data subjected to cyclic division are collected and loaded to generate a time sequence data set, a reference candidate range state is judged based on the threshold value, and a fault judgment reference library is constructed; and executing deviation analysis prediction trend through the reference library, generating a compensation instruction, identifying potential faults in combination with a threshold value, an actual value and a prediction value, calculating a link fault probability, and completing diagnosis. According to the invention, monitoring adaptability and accuracy can be improved, compensation in advance and accurate fault early warning are realized, and stable operation and test accuracy of equipment are guaranteed.

The invention discloses a creep test system of a turbine rotor blade film hole simulation piece and a test method of the creep test system. Comprising a clamping assembly used for fixing a test piece, a loading assembly used for applying a load to the test piece, a strain measuring assembly used for measuring the strain rate of the test piece, a heating assembly used for covering the test piece to form a heating channel, and a cooling assembly used for manufacturing and conveying cooling airflow to flow through the interior of the test piece, the strain measurement assembly is used for measuring the external temperature of the test piece and the internal temperature of the test piece, the control assembly is connected with the strain measurement assembly, the heating assembly, the cooling assembly and the temperature measurement assembly, and the heating assembly is used for manufacturing and conveying high-temperature airflow to flow through the heating channel so as to heat the outside of the test piece to a first set temperature; the cooling assembly is used for cooling the interior of the test piece to a second set temperature, and the heating assembly and the cooling assembly are used for forming a dynamic convection environment around the test piece.

The invention discloses an MGPCC fracture damage monitoring method based on AE and DIC, and relates to the technical field of building material fracture damage monitoring, the method comprises the following steps: preparing an MGPCC fracture test piece, arranging an acoustic emission probe, installing the test piece on a 3-P-B fracture test device, carrying out displacement control loading, collecting AE signals and shooting images in real time during loading, and determining the fracture damage of the MGPCC. Then analyzing characteristic parameters, images and the like to determine FPZ related conditions, and finally establishing a fracture damage evolution model in combination with a monitoring result. Spatial distribution and characteristic parameters of a damage source are monitored in real time through the AE technology, a strain cloud picture and a displacement field are accurately obtained in combination with the DIC technology, microcrack propagation and FPZ formation and evolution laws in the MGPCC fracture process are revealed, multi-dimensional quantitative characterization of the fracture damage process is achieved, and the method is suitable for mass production. A more comprehensive and accurate technical means is provided for building material fracture damage monitoring, and the blank of MGPCC multi-scale crack resistance and damage evolution research is filled.

An apparatus for material testing of a specimen. The apparatus-includes a specimen holder for holding a specimen to be tested, a rod arrangement for moving in direction to the specimen holder for transmitting a mechanical load to the specimen, an actuator for moving at least one of the rod arrangement and the specimen holder with respect to each other along a horizontal impact direction, and a supporting base, onto which the specimen holder, the rod arrangement and the actuator are mounted. A specimen holder arrangement is detachably coupled to a holder accommodation section of the supporting base.

The invention provides an in-situ real-time monitoring method and system for a rock microscopic fracture mechanism and stress evolution. The method comprises the following steps: S1, standardized preparation and pretreatment of a rock sample; s2, in-situ loading and multi-modal data synchronous acquisition are carried out; s3, crack dynamic tracking and stress-strain field joint calculation; s4, constructing a microscopic-macroscopic quantitative correlation and damage model; and S5, performing multi-dimensional dynamic visualization and engineering output. The in-situ scanning electron microscope and the mechanical loading device are integrated, so that cross-scale synchronous monitoring and quantitative analysis of micro crack evolution and macroscopic stress-strain response are realized. A low-disturbance clamping device and a conductive anti-charge sample are treated, and in-situ testing is ensured; combining DIC and deep learning to quantify a crack propagation path, a local strain field and energy characteristics; through DIC strain inversion and finite element calculation, a non-contact stress cloud picture is generated in real time, and finally quantitative correlation between a microscopic fracture mechanism and macromechanical response is established.

The invention discloses a concrete temperature stress testing machine for compensating ambient temperature, which belongs to the technical field of concrete temperature strain test and comprises a testing machine host, a heat insulation box, a sealing sleeve, a water-cooling temperature control system and an active compensation system. Through the combination of the heat preservation box and the sealing sleeve, the concrete test block, the fixed-end universal joint, the movable-end universal joint, the fixed chuck, the movable chuck, the load sensor and other core test parts are sealed in the heat preservation box and the sealing sleeve, an independent internal constant-temperature test area is constructed, and the idealized premise that temperature changes of all the parts are consistent in the prior art is broken through; meanwhile, a water-cooling temperature control system composed of a first water cavity, a through groove, a second water cavity, a water injection pipe and a water drainage pipe is arranged among the first fixing base, the second fixing base and the sliding rod, it is ensured that the external temperature is constant, and the water-cooling effect is good. The problem of superposition of external deformation and deformation of the test piece and the internal part is thoroughly avoided.

The invention discloses a multi-field joint detection method for force transfer path change of a deep flexural member, relates to the technical field, and aims to solve the problems that the local bearing capacity of a structure is reduced and the uncertainty of a force transfer path is increased. Collecting crack width and concrete peeling thickness and area, calculating a cross section loss coefficient, determining pressure rod bearing width by combining the crack width, analyzing a crack density index after screening a target position, and judging whether a path migration signal is generated or not. After a signal is generated, acquiring strain data by using a fiber grating sensor, analyzing the characteristics of a force transmission path, detecting vibration acceleration, fusing the strain data and the vibration acceleration to evaluate a path reconstruction index, and judging whether the force transmission path is changed or not. The method effectively improves the monitoring precision and response speed of the deep flexural member, avoids potential faults, and guarantees the structural safety.

The invention discloses a device and a method for monitoring the integrity of a small-size metal sample in a high-pressure environment. An environment control system; the loading system comprises an electronic testing machine and a connecting rod, and the electronic testing machine loads a small-size metal sample installed in the high-pressure kettle in an electric insulation mode through the connecting rod to achieve stress or strain controlled loading; the electric signal measurement system comprises a constant current source, a current commutation device and a signal acquisition device. The constant current source applies a constant current to the small-size metal sample, the current reversing equipment switches the direction of the constant current at a preset frequency, and the signal acquisition equipment intermittently monitors voltage values at two ends of the small-size metal sample; and determining the integrity change of the small-size metal sample according to the change of the voltage value in the loading process. According to the invention, on-line monitoring of the integrity of the small-size metal sample is realized in a high-pressure environment.

A method for evaluating shale compressibility logging based on game theory, comprising: step 1 of preparing rock core data, conducting experiments, and obtaining rock mechanical parameters and experimental rock physical parameters; step 2 of establishing a relationship between the rock mechanical parameters and the experimental rock physical parameters; step 3 of establishing a relationship between the rock mechanical parameters and the experimental rock physical parameters to predict the formation pore pressure based on the well logging rock physical parameters; step 4 of establishing a relationship between the laboratory and field logging rock physical parameters; step 5 of constructing a geostress calculation model for the research block formation and further obtaining related parameters; step 6 of obtaining the main controlling factors of shale compressibility geomechanics by normalizing the oil recovery intensity; step 7 of obtaining the main expression parameters and ranking of the relatively independent shale compressibility; and step 8 of determining the shale compressibility index. [Effects] A method for evaluating shale compressibility has been established with high accuracy.

The invention provides a high-speed submerging jet flow and mechanical shock synergistic ice damage test method. The method comprises the following test steps: S1, arranging a data acquisition system; s2, initializing working conditions; s3, preparing an ice body sample; s4, prefabricating ice body damage by high-pressure water jet; s5, a servo electric cylinder drives a mechanical structure to impact ice damage; s6, data acquisition; and S7, data processing. According to the invention, the force sensor, the laser displacement sensor and the high-speed camera synchronously collect the load, deformation and image information of ice damage caused by impact of a mechanical structure by means of the servo electric cylinder under the jet-assisted effect, so that accurate control and synchronous measurement of submerged jet and mechanical cooperative damage are realized; the impact of different mechanical structures at different speeds on the ice damage load is avoided.

The invention relates to the technical field of data error correction, in particular to a calibration error correction method and system for a falling weight deflectometer, and the method comprises the steps: obtaining deflection values of a displacement sensor of the falling weight deflectometer to form a deflection program sequence, calculating deflection abnormal values of the deflection values, obtaining deflection rightward sequences of the deflection values, and calculating deflection error sequences of the deflection values; the method comprises the following steps: acquiring a deflection value of each deflection value, further acquiring a deflection continuation characteristic value of each deflection value, acquiring a load transfer weight of each deflection value through a correlation degree between local deflection sequences of deflection values of the same bit sequence in a program sequence during adjacent deflection, and acquiring a road looseness influence degree of each deflection value in combination with the deflection continuation characteristic value corresponding to each deflection value. Further acquiring deflection vibration characteristic values of the deflection values and smooth window scales of the deflection values, and smoothing the program columns during deflection so as to correct deflection data errors of the drop weight deflectometer. According to the application, the calibration error correction precision of the drop weight deflectometer can be improved.

The invention relates to the technical field of geotechnical engineering and geological disaster monitoring, in particular to a rockburst tendency dynamic discrimination method, and aims to solve the limitation caused by the fact that a dynamic evolution process is simplified into a quasi-static attribute in traditional rockburst tendency evaluation. According to the method, rockburst tendency is defined as a hidden state variable evolved along with time, a physical constraint state space model containing a hidden state kinetic equation and a multi-modal observation equation is constructed, continuous stress-strain and discrete acoustic emission data are fused, hidden state probability distribution is estimated in real time through online Bayesian inference, and the probability distribution of the hidden state is estimated in real time. And in combination with adaptive information weight updating and physical consistency constraint, predicting a future state trajectory, calculating a risk probability exceeding a critical threshold, and outputting a dynamic rockburst tendency level. According to the scheme, continuous, dynamic and prospective judgment of the rockburst tendency is realized, and the accuracy and reliability of early warning are improved.

The utility model discloses a construction reinforcing steel bar detection clamp, which comprises a fixed table, the outer wall of the top of the fixed table is connected with two clamping structures through adjusting assemblies, each clamping structure comprises a fixed frame and a telescopic cylinder, the fixed frame is in sliding fit with the outer wall of the top of the fixed table, and the telescopic cylinders are arranged on the fixed frame. The telescopic air cylinder is installed on the outer wall of the top of the fixing frame, a lower clamping plate assembly and an upper clamping plate assembly are oppositely arranged on the inner wall of the fixing frame, the upper clamping plate assembly comprises a fixing plate and a connecting plate, the fixing plate is connected to the telescopic end of the telescopic air cylinder, connecting rods are connected to the two sides of the fixing plate, and one ends of the two connecting rods are connected with the same connecting plate. A pressure sensor is arranged between the fixing plate and the connecting plate; according to the steel bar clamping device, by arranging the connecting plate, the pressure sensor and the connecting rod, the pressure on a steel bar can be controlled when the steel bar is clamped, and deformation of the steel bar caused by too large clamping force is avoided.

The invention discloses a combined load synchronous application testing device. The technical problems that in the prior art, the load applying mode is single, and the combined load cannot be synchronously applied are solved. The device comprises a connecting mechanism and a load applying mechanism, wherein the load applying mechanism comprises a torsional load applying structure, a load transmitting structure and a multi-linkage testing structure. The load transmission structure comprises a special-shaped stress plate and a torsional load transmission assembly, and the torsional load transmission assembly comprises a connecting chuck and a torque plug-in. By controlling the rotation of the torsion load transmission assembly, a pure torsion load applying mode or a conversion mode of converting torsion motion into radial load can be selectively realized, and multi-directional load detection is realized. The invention further provides a combined load synchronous applying function, the single driving source synchronously activates the torsion load path and the radial load path by adjusting the geometric positions of the torque plug-in and the load adjusting plate on the connecting chuck, and synchronous applying of the torsion load and the radial load is achieved.

The invention provides a thermal fatigue test system and method for testing thermal shock resistance of a stealth coating, and belongs to the technical field of aero-engine tests.The system comprises a switching section used for introducing main runner gas and measuring the state of the main runner gas; the exhaust section is used for exhausting gas in the main runner and cooling the gas; the test cascade comprises a test piece and a container device wrapping the test piece, the front end of the container device is connected with the switching section, the rear end of the container device is connected with the exhaust section, and the test piece is inserted into the container device; the cooling air system comprises a compressed air control system and an electric heater, the compressed air control system comprises a flowmeter, a three-way valve and an exhaust regulating valve, the flowmeter is arranged at the front end of the electric heater, the rear end of the electric heater is connected with an inlet of the three-way valve, one outlet of the three-way valve is connected to an inlet of the test piece, and the other outlet is connected with the exhaust regulating valve for exhausting; and the test and data acquisition system comprises a temperature measuring instrument, a pressure scanning valve and kingview software.

The invention provides an array jet flow and mechanical shock synergistic efficient controllable ice damage method which comprises the following steps: S1, moving to an ice damage target position, and defining an ice damage target range; s2, adjusting the position of a high-pressure jet array and a mechanical impact point according to the ice damage range; s3, the ice material is subjected to continuous impact melting corrosion through a high-pressure jet array, and jet defects distributed in an array mode are manufactured; s4, mechanical impact acts on the target area of the ice material, radial cracks radiating outwards are generated, the radial cracks are connected with the multiple jet flow defects and guide the multiple jet flow defects to generate annular crack communication, and bending failure of the ice material is accelerated; s5, the crushing degree of the ice material in the target range is checked, and if the ice material is not crushed completely, the step S4 is repeated; and S6, the mobile platform continuously works, and the step S1 to the step S5 are repeated. According to the method, the damage range and the ice damage degree of the ice material can be accurately controlled by means of the annular cracks generated by the jet damage cooperating with the mechanical impact effect, and accurate ice breaking is achieved.

A waveform analytical device 4 which analyzes a target waveform which is a chromatogram or an optical spectrum includes a waveform division unit 54 configured to divide the target waveform into a plurality of partial waveforms, a determination unit 55 configured to determine whether each of the plurality of partial waveforms of the target waveform is a peak portion using a learned model created by machine learning using a plurality of sets of a plurality of partial waveforms created by dividing a reference waveform having a peak portion whose position is known, and a classification unit 56 configured to classify the target waveform into a peak region where the peak portion continues and a non-peak region other than the peak region based on a determination result from the determination unit.

The invention discloses a white and black pavement structure exterior and interior disease one-key plotting method oriented to pavement health management, and relates to the technical field of road engineering detection and maintenance. Reflection crack tracing is realized based on an interlayer disease conduction rule by establishing a cement board joint coordinate system; the method comprises the following steps: determining the types of broken slabs and slab corner fractures by utilizing the spatial geometrical relationship between cracks and joints, calculating indexes such as a load transfer coefficient, a reflection crack rate, a slab breakage rate and a pavement condition index, and generating a visual result containing disease distribution and performance parameters in a linkage manner. According to the method, the traditional single structure layer analysis limitation is broken through, the reflection crack recognition accuracy rate exceeds 92%, the broken plate judgment accuracy rate reaches 94% or above, the batch data processing time complexity is optimized to O (n + m), the single road section analysis time is shortened to be within 5 minutes from 2 hours, the problems of low manual detection efficiency, large errors and the like are effectively solved, and quantitative support is provided for precise maintenance of white and black pavements.

The invention provides an electrode and diaphragm interface contact performance testing device and method, and the device comprises a chamber, the middle part of the chamber is provided with a diaphragm installation platform, the middle part of the diaphragm installation platform is provided with an opening, and the opening is used for placing a diaphragm; a moving assembly is arranged in the upper cavity, and the moving assembly is configured to move towards the diaphragm mounting platform or move away from the diaphragm mounting platform when being started; a mounting part is arranged at one end, close to the diaphragm mounting platform, of the moving assembly and is used for mounting an electrode; the cavity pressure adjusting assembly is arranged in the upper cavity and / or the lower cavity and is configured to adjust the air pressure in the upper cavity and / or the lower cavity; the measuring assembly is configured to measure physical parameters of the electrode and / or the diaphragm and / or the cavity when the electrode presses the diaphragm downwards, and the physical parameters comprise a stress value and / or a displacement value and / or an air pressure value. The testing device can synchronously test the contact performance of the electrodes and the diaphragms in a one-to-one correspondence mode.

The invention discloses automatic detection equipment and a detection method based on automobile glass strength, and belongs to the technical field of automobile glass detection.The automatic detection equipment comprises a box body, a plurality of detection cavities are formed in the box body from top to bottom at equal intervals, bearing seats are arranged in the detection cavities, and moving driving mechanisms are assembled between the bearing seats and the detection cavities; a multi-stage speed regulating mechanism is assembled among the multiple movable driving mechanisms, a clamping mechanism is assembled at the top end of the bearing seat, and the bottom end of the detection cavity is of an inclined structure. According to the invention, the plurality of detection cavities are arranged, the bearing seats with different moving speeds are respectively arranged in the plurality of detection cavities, the clamping mechanisms are arranged on the bearing seats, and meanwhile, the plurality of pneumatic impact mechanisms are arranged, so that the impact strength of automobile glass at different speeds can be simulated, and the comprehensiveness of automobile glass strength detection is improved.

The invention relates to a method for simulating a complex earthquake load in a triaxial test, and belongs to the field of geotechnical engineering indoor test methods. The invention mainly overcomes the defects in the prior art, and provides a simulation method for complex earthquake load in a triaxial test, which comprises the following steps: acquiring a near-field strong earthquake record, and carrying out baseline correction and filtering processing on the near-field strong earthquake record; decomposing and synthesizing the near-field strong earthquake record; performing time-history conversion on the near-field strong earthquake record, and determining experimental parameters; preparing a soil-rock mixture sample, and saturating the sample; performing an indoor triaxial test on the saturated sample according to the determined experimental parameters; calculating the correlation between the input waveform and the output waveform according to the test result; and analyzing typical dynamic characteristics of the soil-rock aggregate under the action of the near-field strong earthquake according to a test result. The invention provides a method for analyzing test data under the action of earthquake load, and provides an indoor triaxial test method for carrying out research on dynamic characteristics of a rock-soil body by near-field strong shock of an active fault zone.

The invention discloses a shock wave diffusion process testing method based on double cameras and digital schlieren. The method comprises the steps that two high-speed cameras are used for shooting digital schlieren images generated in the shock wave diffusion process; performing image splicing on the acquired images shot by the double cameras; the position of the shock wave is calculated through the spliced image, shock wave position data at different moments are obtained, and the speed of shock wave propagation in the x-axis direction and the y-axis direction is obtained. Based on binocular vision, a digital schlieren system is adopted to collect an air flow field information image containing a shock wave propagation process; splicing of double-camera images is achieved through an improved homography matrix method, the shock wave testing range is expanded, the whole shock wave propagation process is successfully captured, the shock wave diffusion testing accuracy is improved, and visual monitoring of wave types represented by shock waves in various transparent media can be achieved.

The invention discloses an in-situ three-dimensional full-field transparent visual evaluation method for a rock mass grouting modification effect, and relates to the technical field of geotechnical engineering.The method comprises the steps that S1, in-situ anisotropic sound wave CT data before and after grouting is collected in a target grouting area through a multi-azimuth sound wave ray cluster, and the CT data is obtained; obtaining a high-resolution three-dimensional anisotropic wave velocity field through anisotropic elastic wave inversion and physical constraint neural network super-resolution reconstruction, and automatically identifying a high-value region, a low-value region, a gradient mutation region and a stable region based on a wave velocity variation and a gradient change rate; according to the rock mass grouting modification effect in-situ three-dimensional full-field transparent visualization evaluation method, the scientificity, the fineness and the visualization level of rock mass grouting modification effect evaluation are remarkably improved, and powerful technical support is provided for guaranteeing project quality and optimizing grouting design.

The invention relates to an experimental falling ball impact device which comprises a base and a lifting mechanism, the lifting mechanism comprises a lifting platform, a synchronous belt and a lifting servo motor, a transmission shaft of the lifting servo motor is in transmission connection with the synchronous belt, and the lifting platform is fixedly connected with the synchronous belt. The lifting platform is provided with an infrared distance sensor and a horizontal transverse mechanism, the lifting servo motor controls the lifting platform to move up and down, symmetrical intercepting mechanisms are arranged on baffles on the two sides of the base, and the horizontal transverse mechanism is located below the lifting platform. The horizontal transverse mechanism is provided with an X-direction servo motor, a Y-direction servo motor, an electromagnet and a laser drop point indicator, and the transverse mechanism is used for moving the electromagnet in the X direction and the Y direction. According to the device, the falling ball position and the falling ball height can be automatically adjusted, secondary falling balls can be intercepted, it is avoided that secondary impact influences experiment data, and the accuracy of the experiment data is guaranteed.

The invention provides a dynamic strength test system and method for a soft rock biaxial Hopins compression bar, and the system comprises an axial impact loading unit which is used for generating an axial impact load; the confining pressure loading unit is used for applying radial confining pressure to the sample; the high-pressure fluid injection unit is used for injecting high-pressure fluid into the sample and simulating different internal water pressure and water saturation conditions; the data acquisition unit is used for recording impact load, confining pressure, internal water pressure and sample dynamic response data in real time; the control system is used for coordinately controlling the axial impact speed, the confining pressure and the internal water pressure value; by integrating the axial impact loading unit, the hydraulic servo confining pressure loading unit and the high-pressure fluid injection unit, a test platform capable of truly simulating a complex stress-seepage coupling environment where the deep soft rock is located is formed; therefore, the synchronous, independent and accurate control of axial dynamic load, constant or dynamic confining pressure and internal pore water pressure is realized.

The invention discloses a grid spring fluctuation load stress corrosion test device and method. The device comprises a high-pressure kettle; an environment control system; the loading system comprises a loading tester and a loading pair, and the loading pair is used for applying constant deformation and fluctuation load to the grillage spring; the loading tester controls the loading pair to move in the high-pressure kettle until the loading pair is in contact with the grillage spring; the contact point measuring system comprises a constant voltage source and a first signal acquisition device, constant voltage is applied to the grillwork spring and the loading pair through the constant voltage source, and the first signal acquisition device monitors current abrupt change and determines a loading starting point; according to the integrity measuring system, a constant current source provides stable direct current, a current reversing device switches the current direction at a preset frequency, and a second signal collecting device monitors changes of electric signals at the two ends of the grillwork spring in real time and determines the complete state of the grillwork spring. According to the invention, accurate identification of the loading starting point of the grillage spring and real-time monitoring of the integrity state in the high-pressure environment are realized.

The invention discloses an ultrasonic welding quality online detection system and method, and belongs to the technical field of laser non-contact measurement. According to the invention, the laser vibration measurement probe is rigidly coupled to the welding head to construct a follow-up-common-optical-path measurement unit, so that synchronous acquisition of vibration signals with zero mass loading is realized; further extracting an attenuation section after welding is finished from the signal, and inverting an equivalent modal damping ratio representing an interface energy dissipation state based on an exponential attenuation model; meanwhile, multi-dimensional physical indexes such as an energy transfer efficiency index Itrans and an input stability index Iin are calculated, and in combination with an energy absorption state index, collaborative fusion is carried out through a weighted fusion formula to obtain a comprehensive quality score; and finally, realizing quality attenuation early warning based on time sequence trend analysis of a scoring sequence. On-line sensing of the deep dynamic state in the welding process is achieved, the early defect recognition sensitivity and the system anti-interference capacity are remarkably improved, and the predictive maintenance capacity of quality degradation is achieved.

The utility model discloses a push-pull force detection device, which comprises a push-pull force meter and a test platform connected with the push-pull force meter, and is characterized in that the test platform comprises a base, a push-pull force sensor and a detection device, the transmission mechanism comprises a transmission lead screw and a transmission sliding block arranged on the transmission lead screw in a sleeving mode, and the transmission sliding block conducts linear reciprocating motion in the axial direction of the transmission lead screw. The driving mechanism is connected with the transmission screw rod and drives the transmission screw rod to rotate; the clamping mechanism is used for clamping a to-be-tested product and comprises a first clamping assembly and a second clamping assembly, the first clamping assembly is connected with the transmission sliding block, and the second clamping assembly is connected with the pull and push dynamometer; the first clamping assembly and the second clamping assembly are oppositely arranged in the axial direction of the transmission lead screw. And the height adjusting mechanism is connected with the pull and push dynamometer to drive the pull and push dynamometer to move along the vertical direction. Through the arrangement of the height adjusting mechanism, the height of the pull and push dynamometer is adjusted, so that the height of the second clamping assembly is adjustable, the levelness of a product to be measured is kept, and the accuracy of drawing force measurement is improved.