1184results about "Material strength using steady torsional forces" patented technology

The invention relates to the technical field of composite fiber non-woven fabric manufacturing, in particular to a composite fiber non-woven fabric tensile property testing device which comprises a base, and an n-shaped support and a limiting sliding way located under the horizontal section of the n-shaped support are fixedly installed on the upper end face of the base. And a stretching mechanism for stretching the composite fiber non-woven fabric front and back is arranged on the limiting slide way. The tensile property test of the composite fiber non-woven fabric is completed by adopting an integrated operation model of stretching, twisting and extruding, the test reliability is improved by adopting a fixing mode of combining clamping of upper and lower cambered surfaces with matching of a rubber plate, a convex block and a groove, and meanwhile, the tensile property of the composite fiber non-woven fabric is improved through plane stretching, twisting and plane stretching tests after twisting as well as downward extruding and stretching of a middle section. The composite fiber non-woven fabric tensile property testing device can simulate complex stress conditions possibly faced by the composite fiber non-woven fabric in practical application, so that the tensile property of the composite fiber non-woven fabric in multiple stress states is comprehensively evaluated, multiple testing modes are realized on a single device, and the overall testing efficiency is improved.

The invention discloses a cable structure strength detection device and method, and relates to the field of cable structure detection.The cable structure strength detection device comprises a bottom plate, a plurality of supporting pieces are arranged at the upper end of the bottom plate, a main plate is arranged at the upper ends of the supporting pieces jointly, side plates are symmetrically arranged on the two sides of the main plate, and a lead screw is rotationally connected between the side plates jointly; the clamping assembly is arranged on the lead screw and used for clamping the cable. Through mutual cooperation of a limiting plate and a second air bag, air in the second air bag uniformly enters the first air bag through a communicating pipe, the air in the first air bag is increased, the air pressure in the first air bag is increased to apply pressure to the surface of the cable, and in the process of stretching the cable, the larger the stretching distance is, the larger the pressure to the surface of the cable is. Meanwhile, the surface of the cable can be prevented from being damaged through clamping of the first air bag, the accuracy of a cable detection result is improved, and pulling force is indirectly applied to the cable through the clamping plate.

The invention belongs to the field of corrugated pipe detection, and provides a corrugated pipe detection test bench, which comprises a water tank, two sides of the water tank are fixedly connected with fixing seats, the fixing seats are slidably connected with sliding plates, telescopic electric push seats are connected between the sliding plates and the fixing seats, the sliding plates are fixedly connected with sealing mechanisms, and the sealing mechanisms are fixedly connected with the water tank. The two sealing mechanisms can fix and seal the two ends of the fixing base of the corrugated pipe, stretching assemblies are arranged in the sealing mechanisms, a rubber pipe is arranged between the two stretching assemblies, and the two stretching assemblies can fix the two ends of the rubber pipe. According to the corrugated pipe clamping device, the limiting mechanism and the positioning mechanism are started to clamp the corrugated pipe at the same time, at the moment, under the magnetic force effect of the electromagnet, the elastic assembly is in adsorption connection with the limiting mechanism, meanwhile, the supporting assembly is in adsorption connection with the positioning mechanism, and the middle of the corrugated pipe is fixed through the supporting assembly and the positioning mechanism; and elastic assemblies and limiting mechanisms are arranged on the two sides of the positioning mechanism to elastically limit the corrugated pipe.

The invention relates to the technical field of monitoring, in particular to a cable aging monitoring and early warning method and system. The method comprises the following steps: acquiring cable monitoring data, and performing electrical characteristic analysis to obtain electrical characteristic data; performing conductor oxidation analysis based on the electrical characteristic data to obtain conductor oxidation data; cable image feature extraction is carried out according to the cable monitoring data, cable morphology type division is carried out, and curve segment cable data and winding segment cable data are obtained; performing bending fatigue analysis on the curve section cable data to obtain bending fatigue data; performing winding stress analysis on the winding section cable data to obtain winding stress data; performing material damage evaluation according to the bending fatigue data and the winding stress data to obtain material damage data; and carrying out damage position identification according to the material damage data to obtain damage position data. The cable aging monitoring accuracy and the early warning response rate are improved based on the monitoring technology.

The invention discloses a wire core fatigue monitoring device, method and equipment of an aerial cable, and belongs to the technical field of electric power facilities. The device comprises a cable data acquisition module used for acquiring cable rack distance data on two sides of a target position of an aerial cable and sagging radian data of the cable; the traction tension acquisition module is used for determining the traction tension applied to the target position of the cable according to the coil holder distance data and the droop radian data; the swing amplitude data acquisition module is used for acquiring swing amplitude data generated by the aerial cable under the action of wind power within a preset period; the torsion data calculation module is used for calculating torsion data borne by the target position according to the swing amplitude data and the droop radian data; and the fatigue degree determining module is used for determining the fatigue degree of the aerial cable core at the target position according to the traction tension and the torsion data. According to the technical scheme, the operation safety of the cable can be monitored in real time, the cable core with a relatively large fatigue degree can be found and replaced in time, and the normal operation of the cable is prevented from being influenced.

The invention discloses a shield segment multi-dimensional mechanical property test platform, which comprises an outer frame, a vertical loading system, an annular external loading system, an inner frame, an annular internal loading system, a torsion loading system and a plurality of displacement sensors, and is characterized in that the inner frame and the outer frame are respectively arranged on the inner side and the outer side of a segment; the inner frame and the outer frame are connected through a connecting plate, the vertical loading system is arranged at the top of the outer frame, and the loading end of the vertical loading system telescopically abuts against the top of the outer side of the segment; the annular loading system is arranged on the outer frame, and a plurality of loading ends of the annular loading system are telescopically propped against the outer sides of the duct pieces respectively; the annular inner loading system is arranged between the inner side of the duct piece and the outer side of the inner frame; loading ends of the torsion loading system are respectively arranged on two sides of the duct piece; and the plurality of displacement sensors are sequentially arranged on the duct piece. According to the invention, through combination of different loading systems, the mechanical properties of the duct piece in a complex environment can be simulated.

The invention relates to the field of material testing, and particularly discloses a shear box for simulating lunar soil ring shear testing and a testing device.The shear box comprises a lower box body, an upper box body, an axial loading assembly, a vacuum air channel and a shear seam adjusting mechanism; the testing device comprises a ring shear apparatus and a shear box, the ring shear apparatus comprises a torsional shear measurement and control module, an axial loading measurement and control module and a sensing module, and the sensing module comprises a temperature sensing assembly, an acoustic emission sensor and the like. According to the invention, multi-field coupled lunar soil environment simulation including vacuum, temperature, mechanical loading and the like can be provided, and multi-field collaborative analysis and cross-scale research of lunar soil mechanical behaviors are realized.

The invention discloses a multi-linkage combined load synchronous application strength 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 relates to the technical field of metal fatigue life prediction, in particular to an additive manufacturing metal multi-axis high-cycle fatigue life prediction method based on defect characteristics. The method comprises the following steps: performing defect detection on a metal sample to obtain size parameters and position parameters of defects in the metal sample; determining the type of the defect in the metal sample and setting a first correction factor and a second correction factor; calculating the equivalent stress strength factor amplitude of the metal sample under multi-axial loading; acquiring a long crack propagation threshold value of the metal sample; normalizing the position parameters to obtain normalized position parameters; and establishing a fatigue life prediction model of the metal sample according to the normalized position parameters, the equivalent stress strength factor amplitude of the metal sample under multi-axial loading and the long crack propagation threshold value of the metal sample, and calculating the multi-axial high-cycle fatigue life of the metal sample. According to the method, the fatigue life of the metal material containing the additive manufacturing defects under multi-axis high-cycle fatigue loading can be accurately predicted.

The invention relates to a road and bridge construction concrete strength detection device which comprises a fixing assembly for fixing a to-be-detected concrete block, a torsion power assembly for performing torsion deformation on the to-be-detected concrete block and a fixing seat for mounting and fixing, the pressure applying mechanism is used for carrying out a top pressure test on the central position of the to-be-tested concrete block, the torsion adapting mechanism is used for being matched with the pressure applying mechanism to ensure that pressure is stably applied to the to-be-tested concrete block in the pressure applying process, and the pressure applying mechanism is arranged at the central position of the upper end of the to-be-tested concrete block; the bottoms of the two ends of the pressure applying mechanism are matched with a to-be-tested concrete block through a torsion adapting mechanism, and a pressure adjusting mechanism used for adjusting the pressure of the torsion adapting mechanism and ensuring the stability of the torsion adapting mechanism is installed in the pressure applying mechanism. And when pressure is applied in a concrete torsion process, a pressure piece often slips to cause inaccurate experimental data.

The invention relates to an SEM (scanning electron microscope) and CT (computed tomography) compatible solid propellant mechanical property testing device and method, belongs to the technical field of precise scientific instruments and material micro-mechanical property testing, and solves the problems that in the prior art, due to the fact that imaging equipment is single, and image quality becomes poor due to creeping accumulation, micro-scale failure information of propellants is incomplete and inaccurate to obtain. In the mechanical property testing device, the in-situ mechanical testing device performs mechanical loading and load holding on the propellant sample, the SEM obtains the surface appearance of the propellant sample, the double-source double-probe industrial CT obtains the internal three-dimensional structure of the propellant sample, and the in-situ mechanical testing device is transmitted between the transfer cabin main cavity and the electron microscope cabin through the transfer channel. And the vacuum transfer cabin containing the in-situ mechanical testing device is transferred between the transfer channel and the scanning turntable of the double-source double-probe industrial CT by the mechanical arm. According to the invention, more comprehensive and accurate mesoscopic failure information of the propellant sample can be obtained while less time cost is paid.

The invention belongs to the technical field of material mechanical property testing equipment, and particularly discloses an integrated testing machine suitable for implementing multidirectional tension and torsion under a high-temperature working condition and application thereof.The integrated testing machine comprises a base, a cylindrical and topless shell frame is arranged over the base, the shell frame and the base are connected through a leveling structure, a carrying table is arranged in the shell frame, and the carrying table is connected with the base. An annular abdicating groove is reserved between the upper cover and the lower cover; a heating device is arranged in the center of the carrying table, a plurality of rotatable supporting platforms are annularly distributed with the carrying table as the center, each supporting platform is provided with a tension-torsion clamping jaw mechanism used for driving a clamped metal material to be tested to conduct a tension and / or torsion test, and a rotation driving mechanism used for driving the supporting platforms to rotate is arranged in the shell frame. The integrated testing machine disclosed by the invention can simulate the real stress condition of a metal material to be tested to carry out mechanical property testing at different temperatures through the cooperation of the multiple groups of pulling-twisting clamping jaw mechanisms and the rotary driving mechanism, so that the model selection and design requirements of the metal material in different temperature environments are met.

The invention discloses a cable mechanical property testing device and method, and relates to the technical field of cable detection.The cable mechanical property testing device comprises a clamping mechanism, a tension applying mechanism, a torsion applying mechanism and a bending mechanism, the pulling force applying mechanism comprises two force applying moving frames and a pulling force driving assembly; the torsion applying mechanism comprises two torsion driving assemblies installed on the two swing seats correspondingly, and the two torsion driving assemblies are used for driving the two clamps to rotate correspondingly. The bending mechanism comprises a bending abutting assembly located between the two clamps and a bending driving assembly in transmission connection with the bending abutting assembly. The tensile property test, the distortion resistance test and the bending resistance test can be continuously completed through one-time clamping of the cable, different actual installation and use scenes of the cable can be simulated, and the accuracy of tensile property, distortion resistance and bending resistance test results of the cable is improved.

The present invention discloses a testing device for a rubber water stop joint, which relates to the technical field of rubber water stop joints; in order to improve the detection efficiency; specifically, it includes a base, a supporting part and a testing part for performing a pressure test on the main body of the water stop joint. The testing part includes: a bracket: which is fixed on the outer wall of the top of the base, and a piston cylinder is fixed on the outer wall of the top of the bracket, and a filling pipe and an adjusting pipe are respectively welded on the circumferential outer wall of the piston cylinder; a piston plate: which is movably connected to the inner wall of the circumferential wall of the piston cylinder. In the present invention, by providing a driving plate, the bending seat can be driven to rotate, so that the top of the main body of the water stop joint can be twisted by the rotation of the bending seat, so that the anti-twisting performance of the bending seat can be tested. At the same time, by using the first kidney-shaped hole, the circumferential movement of the driving plate can be converted into the linear movement of the ejector rod, and the ejector rod can be used to drive the piston plate to move downward, so as to test the pressure resistance performance of the main body of the water stop joint.

The invention relates to the field of mechanical or material testing, and discloses a tension-torsion combined actuator, which comprises an outer frame assembly, a linear actuator, a guide mechanism, a torsion transmission mechanism, a displacement measuring device and a swing actuator, and is characterized in that the linear actuator and the swing actuator are fixed on the outer frame assembly through bolts; the guide mechanism is radially connected with a piston rod of the linear actuator through a bearing, axial fixation of the bearing is achieved through limiting of a shaft shoulder and an end cover, and the swing actuator transmits torsion action to the piston rod of the linear actuator through the torsion transmission mechanism. The tension-torsion compound actuator is provided with a displacement measuring device and an angle sensor, not only can realize a tension-compression fatigue test, a torsion fatigue test and a tension-torsion compound fatigue test, but also can provide high-precision displacement and angle control, and has the characteristics of multiple functions, high precision, high frequency response, lateral force resistance, low noise and low vibration; and the test efficiency is greatly improved.

The utility model relates to the technical field of forklift fork frame strength detection, in particular to a forklift fork frame strength detection device which comprises a bottom plate and a fork frame, and the top of the bottom plate is fixedly provided with a door-shaped frame and a mounting seat; two testing mechanisms used for carrying out downward pressing, lateral pushing and torsional strength detection on the fork frame are symmetrically arranged in the door-shaped frame, and control mechanisms used for controlling the door-shaped frame to move longitudinally are arranged at the positions, corresponding to the two testing mechanisms, of the top of the door-shaped frame; by arranging the testing mechanism, the effects of simulating a vertical pressure test during cargo bearing, simulating a lateral force test during cargo roll or vehicle body turning and simulating a torsional load test caused by uneven ground or cargo gravity center shift during cargo insertion can be achieved; the performance of the fork frame under various actual working conditions can be comprehensively evaluated, and it is ensured that the fork frame can work safely and reliably in a complex working environment.

The invention discloses a full-automatic spring plunger height and torsion detection device and method, and the device comprises an automatic feeding positioning mechanism which is provided with a spring plunger positioning groove; the automatic detection mechanism comprises a lower die assembly, a pressure sensor and a servo lifting driving unit; a detection positioning groove with an opening in the upper end is formed in the lower die assembly; the servo lifting driving unit drives the pressure sensor to move downwards to a first height, the pressure sensor makes contact with the floating head of the spring plunger, the height size is calculated, then the servo lifting driving unit drives the pressure sensor to move downwards continuously to a second height, and the height size is calculated. The torsion of the spring is tested through the counter-acting force of the spring in the spring plunger to the pressure sensor, the torsion data is automatically recorded, and qualified products and defective products are judged; and the automatic carrying mechanism is used for automatically transferring the spring plungers into the detection positioning grooves, and discharging the detected spring plungers to a corresponding qualified product area and a defective product area according to a qualified product area and a defective product area.

The invention discloses a medical non-woven fabric fallen flocculus detection device, and belongs to the technical field of non-woven fabric fallen flocculus detection, the medical non-woven fabric fallen flocculus detection device comprises a detector main body, the detector main body comprises an operation cabinet and a twisting box arranged on one side of the operation cabinet, and a twisting device for twisting and compressing a sample is assembled in the twisting box; an air collector for collecting air in the test period is arranged below the twisting device, a laser dust particle counter is arranged in the operation cabinet, and one end of the air collector is connected with the laser dust particle counter through a hose; through the arranged shaking unit and the arranged shifting unit, in the process that a sample is distorted and compressed through the distorting device, a force storage piece is gradually driven by a pushing piece to store force and release the force in the recovery process, a sample shaking piece is impacted through an impacting part, the sample shaking piece is made to move upwards, and the recovered sample is collided; therefore, the particles in the wrinkled gaps can be vibrated out and then can be pulled away.

The invention discloses a multi-axial fatigue life prediction method based on physical information, aiming at the problem of multi-axial fatigue damage of a material, an MLP-Attention model provided by the invention adopts a multi-layer sensor MLP to process a complex nonlinear relationship, and meanwhile, aiming at the characteristics of complex data and strong nonlinearity of a multi-axial fatigue experiment, the multi-axial fatigue life prediction method based on the physical information can be used for predicting the multi-axial fatigue life of the material. A self-attention mechanism Attention is introduced, and the accuracy of a model prediction result is improved through adaptive feature weighting; for the difficulty that the multi-axial fatigue life has large discreteness, Gaussian process regression is selected and fused to perform uncertainty analysis on the prediction result so as to predict the fatigue life interval, the practicability and prediction precision of the prediction model are greatly improved, and the problem that uncertainty cannot be quantified in the traditional technology is solved.

The invention provides a rotor blade torsional rigidity testing device, and the device comprises a blade fixing tool which is used for fixing a blade; the circular coding marks are adhered to the two ends of the measured section of the paddle; the loading tray is used for applying force to the paddle; the image acquisition system is arranged above the paddles, and the image acquisition system is used for acquiring images; meanwhile, the invention further provides a rotor blade torsional rigidity testing method, coding marks are pasted on the surfaces of the blades, three-dimensional plane information is fitted through the MPS industrial camera, the torsional rigidity of the blades is obtained through calculation, and the rotor blade torsional rigidity testing method has the advantages of being easy to install, high in precision and high in stability.

The invention particularly discloses a rock-soil body interface torsional shear characteristic and toughness parameter unit body test device which comprises a unit body sample blank manufacturing device, a centering device, a special drilling tool, a rib body and a torque load.The rock-soil body interface torsional shear characteristic and toughness parameter unit body test device has the beneficial effects that traditional direct shear / drawing shear is replaced with torsional shear loading; the problem that the interface contact area is reduced in the shearing process is thoroughly solved, it is ensured that the interface contact area of an anchor / pile and a rock-soil body is constant, a pressure water bag is arranged at the top of a test box unit body, the original overlying and confining pressure environment of a stratum is accurately simulated, a test anchor hole / pile hole is directly manufactured through a drilling technology, and the natural roughness characteristic of the hole wall is reserved to the maximum extent; the smooth wall surface limitation of traditional mold pore forming is broken through, the basic toughness concept of the anchor / pile-rock-soil body interface is defined for the first time, the nature of the basic toughness can be quantitatively represented by the robustness of the shear resistance of the interface, a matched toughness testing technology and evaluation method are developed, and a theoretical model and a calculation tool are provided for the toughness design of anchoring engineering and pile foundation engineering.

To provide more novel technical means for scientifically establishing the relationship between the evolution of a material organization structure under a complex load and the dynamic response of a macro performance.SOLUTION: The invention discloses a scanning electron microscope multi-technology combined mechanical property in-situ testing device and an analysis method, and belongs to the technical field of precise scientific instruments and material micro-mechanical property tests. A tension and compression loading unit conducts tension and compression loading on a sample 652, a displacement platform moves the sample to an SE mode position and a Raman mode position of a scanning electron microscope. A rotation loading unit drives the sample to rotate synchronously, and in-situ testing is carried out at different angles. The obtained multi-scale data in different time spaces are aligned into a load-displacement curve by using the least common multiple of time coordinates, space registration on multiple attitudes of the sample into a reference coordinate system from coordinate system rotation and translation is carried out, and a multi-source data fusion analysis function is constructed.SELECTED DRAWING: Figure 13

The invention relates to the technical field of quality detection, and discloses a quality detection method and device for a carbon fiber shadowless medical line and computer equipment. The method comprises the following steps: installing electrical connection terminals on an inner core conductor and a shielding wire of the carbon fiber shadowless medical wire, and fixing the carbon fiber shadowless medical wire on a test platform to obtain a sample to be tested; testing the conductivity of the to-be-tested sample to obtain a conductivity test data set, and testing the mechanical property of the to-be-tested sample to obtain a mechanical property test data set; performing feature extraction on the conductivity test data set to obtain conductivity feature parameters, and performing feature extraction on the mechanical performance test data set to obtain mechanical feature parameters; and inputting the conductive characteristic parameters and the mechanical characteristic parameters into a double-layer stacking quality detection model for quality detection, and outputting a quality detection result. According to the invention, the comprehensiveness and accuracy of quality detection of the carbon fiber shadowless medical line are effectively improved.

The invention relates to the technical field of screw and bolt performance testing, in particular to a screw and bolt torsion resistance detection device which comprises a workbench, a concave containing groove is formed in the workbench, and a clamping mechanism used for clamping a bolt workpiece is arranged in the containing groove; a guide seat is fixedly mounted on the workbench, a movable frame is slidably connected to the guide seat, an electric push rod is fixedly mounted on the guide seat, an annular pressure sensor is fixedly arranged at the top of the rear side of the movable frame, and a piston rod of the electric push rod slidably penetrates through the rear end of the movable frame and an inner ring of the annular pressure sensor. The top and the middle of a piston rod of the electric push rod are fixedly connected with limiting blocks correspondingly. According to the invention, the rotating ring is matched with the plurality of L-shaped plates, switching mechanisms of different types of bits are carried, and rapid and accurate automatic switching of the bits is realized in combination with the driving part, so that the detection requirements of bolt workpieces with different notch types are met, and the equipment universality and the detection efficiency are improved.

The invention provides a self-fed high-temperature unsaturated frozen soil interface shear test device and a method thereof, and relates to the technical field of civil engineering tests. The test device comprises a shell assembly, a torsion loading assembly, a gas phase imbedding assembly, a liquid phase imbedding assembly, a soil sample containing assembly and a self-feedback assembly, the torsion loading assembly comprises a torsion control box arranged on the inner side of a bottom box, and a torsion controller, a data acquisition master controller and a torsion device are arranged in the torsion control box; the output end of the torsion device is fixedly connected with a hollow cylinder through a torsion transmission shaft, and the hollow cylinder is detachably connected with a plurality of shearing plates. Through the arrangement of the gas phase imbedding assembly, the liquid phase imbedding assembly and the self-feedback assembly, the shearing characteristics of the unsaturated high-temperature frozen soil and the pile interface can be studied under the conditions of different matrix suction forces, different overlying loads and different freezing temperatures by utilizing self-regulation and feedback of the self-feedback assembly.

The invention discloses a strength detection tool and method for a composite cabin for an unmanned aerial vehicle. The detection tool comprises a cabin connecting plate, an end fixing device, a force application adjusting device and a deformation measuring structure. The force application adjusting device comprises a one-way stress application structure, a torsional stress application structure and a stress transmission structure. The stress transmission structure is provided with a special-shaped stress plate, a one-way stress transmission piece and a torsional stress transmission assembly. Particularly, a multi-linkage test structure is arranged, and conversion from torsional moment to radial one-way pressure is realized through geometric constraint and contact mechanics principles. According to the detection method, a step-by-step loading and multi-direction detection mode is adopted, initial detection, surface change detection and multi-direction comprehensive detection are achieved, and the preset deformation quantity is rapidly achieved through a displacement control mode by means of the qualified deformation quantity value detected last time. According to the invention, bending moment and torque load detection in four directions of 0 degree, 90 degrees, 180 degrees and 270 degrees can be completed through one-time clamping.

The invention relates to a tension-torsion combined load test device for a rotary connector, and relates to the technical field of crossing of mechanical engineering and material testing technologies, and the tension-torsion combined load test device comprises a working box, a shell, an automatic clamping assembly, a workpiece hoisting assembly, an axial load applying assembly and a torque applying assembly, the automatic clamping assembly and the torque applying assembly are arranged on the upper surface of the shell in a penetrating mode. A first forward and reverse motor drives a first gear and drives a second gear and a forward and reverse threaded column to rotate, so that two sets of U-shaped movable plates synchronously move in the same direction or in the opposite directions, after the first forward and reverse motor is started, the rotary motion is converted into rotation of the threaded column through gear transmission, and the U-shaped movable plates linearly move along limiting grooves under the action of threads; the clamp claw is driven to realize automatic clamping or loosening, manual operation is replaced, accurate and uniform clamping force is realized, loosening or deviation caused by human factors is avoided, and the reliability of test data is improved.

The invention discloses a device and a method for testing rock crack propagation parameters under thermal shock. The testing device comprises a base. A first abutting piece is arranged at the end of the supporting plate; the pressure applying mechanism is telescopic, and a second abutting piece is arranged at the end of the pressure applying mechanism; the heating piece comprises a first heating plate and a second heating plate, the first heating plate is provided with a first through hole for the first abutting piece to pass through, and the second heating plate is provided with a second through hole for the second abutting piece to pass through; and the coil surrounds the outer side of the heating piece, and the coil heats the heating piece through electromagnetic induction. According to the testing device, the rock sample is heated through the heating piece, and the rock sample is uniformly heated through the first heating plate and the second heating plate. Through the first abutting piece and the second abutting piece which are arranged in a staggered mode, when the pressure applying mechanism applies pressure, the rock sample can be subjected to torsional force so as to observe the crack propagation condition of the rock sample. The invention relates to the technical field of civil engineering and rock engineering.

The invention discloses a textile processing product detection device and a detection method thereof.The textile processing product detection device comprises a rack and further comprises a control box installed on one side of the bottom end of the rack, a friction structure arranged at the telescopic end of a lifting air cylinder, an isolation structure arranged on the outer side of the friction structure and a dust removal structure arranged on one side of the isolation structure; the friction belt is driven to move downwards and make contact with the fabric through stretching of the lifting air cylinder, the electric roller is started to enable the friction belt to conduct plane abrasion testing on the fabric, the telescopic air cylinder is started to enable the supporting roller to move downwards, then the friction belt and the fabric are pushed to be bent and deformed, and abrasion testing of the fabric in the bent state is simulated; and a multi-form testing function is realized, so that the device can comprehensively simulate the testing requirements of the fabric under various form changes such as bending, stretching and twisting, and the wear resistance of the fabric can be comprehensively and deeply evaluated.

The invention discloses uniformly stressed optical fiber test equipment, and relates to the technical field of optical fiber test equipment, the uniformly stressed optical fiber test equipment comprises a chassis and a clamping assembly, sliding grooves are symmetrically formed in the surface of the chassis, and the clamping assembly is arranged on one side of the sliding grooves; and the wrapping and clamping assembly comprises a base, a gear ring, a clamping seat, a clamping block, an annular groove, a rotating ring, a soft cushion, a clamping block, a rotating disc, a clamping groove, a torsion wheel and an arc-shaped block, one side of the sliding groove is connected with the base in a clamped mode, the gear ring is connected to the middle of the base, one side of the base is connected with the clamping seat, and the clamping block is arranged on one side of the clamping seat. During use, the optical fiber end head can be stably clamped, uniform force is applied to the optical fiber end head during tensile detection, the situation that the detection result is influenced by optical fiber breakage caused by stress concentration is avoided, after the tensile detection is passed, torsion detection and bending detection can be continuously performed on the optical fiber, the optical fiber does not need to be transferred to other detection equipment, and the detection efficiency is improved. And the detection result misalignment caused by the damage of the optical fiber in the transfer process is avoided.