666 results about "Radial displacement" patented technology

The invention relates to the technical field of motor manufacturing and detection, and discloses motor rotating shaft concentricity inspection equipment which comprises a supporting mechanism, a rotation driving mechanism, a detection sensor group, a data processing unit and an output unit. The detection sensor group comprises at least two displacement sensors arranged at intervals along the radial direction of the rotating shaft and at least one angle sensor used for acquiring the rotating angle of the rotating shaft; the data processing unit constructs a three-dimensional space motion trail model of the rotating shaft in the rotating process according to angle position data collected by the angle sensor in real time and radial displacement data collected by the displacement sensor in real time so as to determine concentricity parameters of the rotating shaft; the rotation driving mechanism is electrically connected with the data processing unit and controlled by the data processing unit to drive the rotating shaft to rotate at a constant speed at a preset rotating speed, and the data processing unit transmits concentricity parameters to the output unit to be displayed or stored. The defects of a traditional detection method in the aspects of precision, efficiency and intelligence are overcome.

The invention particularly relates to a grinding force closed-loop control and flutter suppression system for crankshaft variable stiffness machining, and aims to solve the problems of unstable grinding force, flutter and surface defects caused by time-varying stiffness characteristics of a crankshaft due to a multi-crank throw and cantilever supporting structure. The system comprises a grinding force detection module, a control module and an execution module. The grinding force detection module is arranged in a grinding wheel and crankshaft contact area and collects grinding force signals in real time. The control module receives an actual grinding force signal, compares the actual grinding force signal with a target value, and outputs a compensation instruction and a suppression instruction; the compensation instruction is generated by adopting a self-adaptive PID or fuzzy PID algorithm based on force deviation, and the grinding wheel feeding speed or the main shaft rotating speed is dynamically adjusted to stabilize the grinding force; and extracting a high-frequency component of the force signal as a flutter feature, identifying a flutter bud through time-frequency analysis, and generating an anti-phase displacement instruction to suppress flutter. The execution module adjusts feeding or rotating speed according to the compensation instruction and adjusts radial displacement of the crankshaft or the grinding wheel according to the suppression instruction.

The invention provides a wafer back surface and edge detection device which comprises a base, and a rotary lifting module, a clamping lifting module, a motion direction conversion module and a visual detection module which are mounted on the base, the rotary lifting module comprises a rotary mechanism and a lifting mechanism; a supporting part for placing a wafer is arranged in the lifting mechanism, and the lifting mechanism is configured to jack the wafer up / down to a working position; the rotating mechanism is configured to provide a circumferential direction movement trend for the movement direction conversion module; the motion direction conversion module is arranged above the rotary lifting module and the clamping lifting module, and is driven by the clamping lifting module to realize displacement in the vertical direction, and the lifting motion of the clamping lifting module is converted into radial displacement of the motion direction conversion module; and the visual detection module comprises a camera unit, the camera unit faces the wafer, and the visual detection module is configured to perform image acquisition and detection on the wafer.

The invention discloses an engine fault detection method, device and equipment based on a single sensor and a medium, and relates to the technical field of fault detection. The method comprises the following steps: acquiring an eddy current original signal and an optical fiber pulse signal of the optical fiber eddy current composite sensor; the optical fiber eddy current composite sensor is installed at the position of an aero-engine casing. Calculating a blade radial displacement signal according to the eddy current original signal, and calculating a blade circumferential displacement signal according to the optical fiber pulse signal; filtering the blade circumferential displacement signal to obtain a target circumferential displacement signal; resampling the radial displacement signal of the blade to obtain a time sequence blade tip clearance signal; and engine blade fault information is determined according to the target circumferential displacement signal and the time sequence blade tip gap signal. Thus, the eddy current original signal and the optical fiber pulse signal are directly measured through the single sensor to detect faults, the transmission path is shortened, the diagnosis sensitivity and accuracy and the measuring point utilization rate are improved, and the sensor arrangement complexity is reduced.

The invention relates to the technical field of maglev motor dynamics and control, and discloses a bearingless asynchronous motor multi-frequency harmonic vibration cooperative suppression method, which comprises the following steps: acquiring radial displacement signals and mechanical angular velocity of a rotor in an x axis and a y axis under a stator fixed coordinate system, and stacking double-axis displacement signals into an observation vector; calculating a weighting coefficient of the normalized residual error through a Huber robust cost function, and outputting the amplitude, the phase and the confidence of each order of harmonic wave; estimating the total disturbance of the system by using a linear extended state observer with harmonic energy injection, wherein the total disturbance is obtained by weighted summation according to the confidence, order and mechanical angular velocity of each order of harmonic; calculating a feedback control force according to the total disturbance estimated value, and superposing the feedforward compensation force and the feedback control force to generate a total suspension force instruction; and according to the total suspension force instruction, inversely calculating a suspension winding current reference value and outputting a control instruction. According to the invention, a mutually complementary cooperative suppression mechanism is formed, and the suppression precision of multi-frequency vibration is improved.

The utility model discloses a novel springboard angle detection device, which comprises a springboard connecting plate, a large gear ring and a fixedly arranged encoder body, the rotation axis of the large gear ring and the rotation axis of the springboard connecting plate are coaxially arranged, and the inner side of the large gear ring is in meshed connection with a pinion. The small gear is connected with a detection shaft of the encoder body and drives the detection shaft to rotate, and the encoder obtains the rotation angle of the small gear and converts the rotation angle to obtain the overturning angle of the springboard. The novel springboard angle detection device is installed between the springboard connecting plate and the speed reducer, is small in size, improves the space utilization rate of the springboard, and does not interfere with a channel above the springboard. A mechanical transmission mode is adopted, the structure is simple and stable, machining is easy and convenient, bolt connection is adopted, replacement is convenient, and data are accurate. By means of the swing arm structure, angle rotation measurement can be kept all the time when relative axial or radial displacement occurs between the large gear ring and the encoder body, and the phenomenon that the large gear ring is separated from the small gear during relative movement is avoided.

A floating joint and retainer connection device includes a fixed retainer internally defines a receiving space; an adaptor joint having an end extending through the receiving space to an outer side of the fixed retainer and an axially limiting section formed near another end; a fixing element fitted on the adaptor joint and located outside the fixed retainer for limiting the adaptor joint from moving axially while allowing the adaptor joint to displace radially relative to the fixed retainer; a rolling assembly disposed adjoining the fixed retainer; and a spring located in the receiving space and fitted on the adaptor joint with two ends pressed against the axially limiting section and the fixed retainer or the rolling assembly. When the rolling assembly rolls to displace radially relative to the fixed retainer, a radial frictional force produced by a normal force applied by the spring to the fixed retainer is reduced.

The invention discloses a cross-scale multi-physics-field coupling aero-engine warming-up process analysis method. The method comprises the steps that firstly, an engine air system one-dimensional network model, a fuel and lubricating oil system one-dimensional network model, a wheel disc and cartridge receiver two-dimensional axial symmetry model, a blade parameterization model and a main runner quasi-one-dimensional model are established; then calculating an air system boundary and a fuel and lubricating oil system boundary by using a main runner cavity method, then calculating the fuel and lubricating oil system boundary and the air system boundary by using a one-dimensional transient fluid network method to obtain a heat exchange boundary of a wheel disc and a cartridge receiver, and considering a thermal load and a centrifugal load in an unsteady state heat conduction process; calculating the radial displacement of the wheel disc and the casing by using a two-dimensional axisymmetric finite element method, and calculating the temperature and the radial displacement of the blades by using an engineering algorithm; and finally, integrating the radial displacement of the wheel disc, the blades and the casing and the initial blade tip clearance value to obtain the blade tip clearance value of each stage in the transient process, and feeding back the blade tip clearance value to the mainstream model again to realize iterative calculation. The analysis precision of each physical field is improved, and the calculation time consumption is reduced.

The utility model relates to an anti-play high-precision self-adaptive mechanical gripper which comprises at least two clamping jaws circumferentially distributed on the periphery of a clamping central axis and a main driving mechanism for driving the clamping jaws to get close to each other or get away from each other, a large number of ejector rods are limited in a containing groove, the adjacent ejector rods are arranged in an attached mode, the radial displacement of the ejector rods is limited, and therefore the clamping jaws can be driven to be close to each other or away from each other. And then the pressing plate is used for pressing or loosening the ejector rod in the radial direction, so that the clamping jaw is switched between the elastic clamping state and the rigid clamping state, self-adaptive clamping can be conducted on workpieces of different shapes, high-precision clamping can be conducted on the same batch of workpieces with errors, and it is ensured that when the workpieces with the errors are clamped, the clamping efficiency is improved. And the center lines of different workpieces are kept constant. When the mechanical claw clamps a workpiece for machining, the movement of the workpiece between the two clamping jaws of the mechanical claw is eliminated, and the machining precision is ensured.

The invention relates to the technical field of energy transmission, and discloses a method for judging a failure mode of a cylinder of pressure-bearing equipment under an external explosion load, which comprises the following steps of: acquiring design parameters of the pressure-bearing equipment and parameters of the external explosion load; establishing a dynamic response numerical model of the pressure-bearing equipment under the explosive load; n data points are arranged in the axial direction of the cylinder body; calculating a dimensionless distance of each data point; constructing a three-dimensional data matrix containing normalized radial displacement, time and dimensionless distance; determining a critical dimensionless distance; drawing a contour map of normalized radial displacement; and judging whether the failure mode is dynamic buckling or plastic sinking deformation through discriminant function calculation. According to the judgment method, the two failure modes of dynamic buckling and plastic sinking deformation of the pressure-bearing equipment cylinder can be effectively distinguished according to the judgment function, the method is simple and visual, the complexity of a traditional analysis method can be overcome, and the judgment result can directly guide design optimization of an anti-explosion structure of the pressure-bearing equipment; and a targeted protection basis is provided for an explosion extreme load working condition.

The invention discloses a hydro-generator stator stabilizing structure, which comprises a plurality of combined connecting units distributed along the circumferential direction of a stator core, and is characterized in that each combined connecting unit comprises an inner side connecting part embedded with an axial extending groove on the outer diameter side of the stator core, and an outer side connecting part embedded with an axial extending groove on the outer diameter side of the stator core; the outer side connecting part is inserted into a guide groove of a pull block fixed on the stator frame; a radial displacement compensation space is formed between the bottom of the guide groove of the pull block and the outer side connecting part; the two axial ends of the combined connection unit are provided with stop blocks in contact with the stator base, and the stop blocks are fixed through axial fasteners. By means of the combined constraint mode that axial segmented embedding of the combined connecting units is combined with radial guiding gaps, the problems of radial stress concentration and circumferential roundness instability caused by thermal deformation of the stator core of the large hydro-generator under the cold and hot alternating working condition are solved, and collaborative optimization of electromagnetic load stable transmission and structural service life is achieved.

The invention discloses a flexible riser vibration response characteristic analysis method, and relates to the technical field of ocean engineering. According to the method, a flexible riser vibration model is established based on a vibration theoretical model and a fluid control equation for vibration analysis, a theoretical time domain response curve of the flexible riser is obtained through MATLAB calculation, and then a flexible riser three-dimensional simulation model is established in an ANSYS Workbench integrated simulation platform. According to the method, a flexible riser three-dimensional simulation model is constructed, material constitutive parameters, boundary conditions and load application of the flexible riser three-dimensional simulation model are configured, then simulation is performed in an ANSYS Workbench integrated simulation platform by using the flexible riser three-dimensional simulation model, bidirectional fluid-solid coupling analysis is performed by coupling a Fluent flow field system and a Transient Stratum module, the radial displacement time history of the flexible riser under a preset working condition is obtained, and the radial displacement time history of the flexible riser under the preset working condition is calculated. And extracting resonance characteristics of the flexible riser. According to the method, the vibration response characteristics of the deep-sea flexible riser under the influence of internal and external fluids in the service process are accurately obtained, and a foundation is laid for guiding the structural stability of a deep-sea operation system.

The invention discloses a multipoint non-uniform measurement device for uniaxial compression radial displacement of salt rock at high temperature and an implementation method. The measurement device comprises an axial load loading system, a test cavity temperature control system, a radial displacement measurement system and a computer data processing system, the test cavity temperature control system is used for regulating and controlling the environment temperature of the salt rock sample placed in the test cavity temperature control system, so that the salt rock sample is located in a high-temperature environment with a preset temperature; the axial load loading system is in contact with the salt rock sample in the test cavity temperature control system and is used for applying a vertically downward axial load to the salt rock sample at a high temperature; and the radial displacement measurement system is connected with the salt rock sample and is used for measuring the real-time temperature and radial displacement of the surface of the salt rock sample placed in the test cavity temperature control system. And the computer data processing system is connected with the radial displacement measuring system. According to the invention, the radial displacement and temperature of the salt rock sample in the uniaxial compression process can be measured with high precision under the high-temperature condition.

The invention discloses a brush wire rigidity detection device for an aero-engine brush seal, belongs to the technical field of aero-engine seal part testing devices, and solves the problem of accurate detection of the brush wire rigidity of the brush seal. Comprising a high-precision annular base (with a sliding rail), a three-axis displacement adjustable sliding block assembly and a bimodal displacement monitoring system composed of a high-speed microscopic vision acquisition module and an infrared laser displacement sensing device. A high-pressure sealed cabin is arranged on the periphery of the base, an intelligent pressure applying mechanism based on the cam-sliding block principle is arranged in the center of the base, a servo motor drives a cam disc to convert rotary motion into high-precision radial displacement, and a force sensing module and a safety gap are integrated to form pressure closed-loop control. The sample fixing device is compatible with samples with different diameters through adjustment of an electrodeless light ring, and a high-frequency vibration exciter simulates a working environment. Force is applied through the pressure applying mechanism, displacement is monitored through the bimodal system, and the rigidity of the brush wire is accurately measured.

The invention discloses an internal strain testing device for a rock hollow cylinder, and relates to the technical field of rock mass mechanical test equipment. The device comprises an internal strain testing device, the internal strain testing device is located in a sample, and the internal strain testing device comprises an LVDT shell, a conversion cone shell and a base shell; one end of each compression probe contacts with the inner wall of the sample, the other end of each compression probe radially penetrates through the conversion cone shell to contact with the lower end of the conversion cone, the contact position of each compression probe and the conversion cone is an inclined platform, and each compression probe is internally provided with a semi-compression spring. The internal strain testing device for converting the radial displacement in the rock into the vertical displacement is designed, and the measurement precision of the strain of the inner ring of the sample is high.

The invention discloses a full-roller contact type strip shape detection roller, and relates to the technical field of strip shape instruments. Compared with a traditional point type or line type detection scheme, a full-roller contact type detection mode is adopted, the whole width of the plate can be fully covered, and higher-precision deformation detection is achieved. Through the resistance value change of the force sensitive resistor and the capacitance change of the detection part, the system can sensitively sense tiny bulges on the surface of the plate, so that the detection accuracy is improved, the real-time monitoring on the deformation of the plate is ensured, and the production quality is improved; due to the fact that the roller body is installed on the machine frame in a rotating mode and cannot move in the radial direction, when protrusions appear on the surface of the plate, torque borne by the roller body is increased, the mechanical property guarantees the detection accuracy of the system, and meanwhile misjudgment caused by external vibration or environmental factors is avoided.

The invention discloses a dynamic seal leakage characteristic test device, which comprises a shell, end covers, a rotating shaft, two turntables, a radial displacement adjusting structure, a temperature sensor, a pressure sensor and a flowmeter, and is characterized in that the end covers are cooperatively installed at two ends of the shell and then cooperatively installed on the rotating shaft, the middle part of the shell is provided with an air inlet, the end covers are provided with air outlets, and the number of the turntables is two; the two rotating discs are installed on the periphery of the rotating shaft in a spaced mode and located on the two sides of the air inlet, the peripheries of the rotating discs and the inner periphery of the shell form an annular cavity used for installing a dynamic seal test piece, and the radial displacement adjusting structure is connected with the shell and used for driving the shell to move in the radial direction of the rotating shaft. And the temperature sensor, the pressure sensor and the flowmeter are respectively used for monitoring the temperature and the pressure at the air inlet and the air flow at the air outlet. The dynamic seal leakage characteristic test device can measure the leakage rate of the brush seal under the conditions of different pressure differences, different temperatures and different rotating speeds, and can simulate the radial interference working condition under the impact of a large load.

The invention relates to the technical field of nickel alloy pipe water pressure detection, and discloses a thin-wall nickel alloy pipe inner wall water pressure test detection system and method. The method comprises the steps that a closed water pressure environment is established in a pipe, a preset pressure gradient is applied, and pipe wall deformation response data are collected through a distributed sensing array; and generating a composite feature matrix containing axial strain, circumferential stress and radial displacement features through multi-dimensional feature extraction, inputting the composite feature matrix into a material performance degradation evaluation model, and simulating microstructure change to output a potential defect distribution map. Dynamically adjusting the water pressure gradient and the pressure maintaining time according to the map, executing a secondary water pressure test, and capturing a microscopic deformation sequence image through high-frequency imaging; comparing the image with a model prediction result identification deviation value, and iteratively updating a model parameter to optimize a detection threshold value; the test is completed by optimizing the threshold value, qualified pipe section marks and defective pipe section positioning coordinates are output, and the comprehensiveness and accuracy of thin-wall nickel alloy pipe inner wall defect detection are improved.

The invention relates to the technical field of nuclear fusion, and provides a supporting structure and a nuclear fusion device. The supporting structure comprises a first connecting assembly, a second connecting assembly, a first supporting assembly and a second supporting assembly. The first connecting assembly is connected with a lower window of the vacuum chamber; the second connecting assembly is connected with the fixed foundation; the first supporting assembly is supported between the first connecting assembly and the second connecting assembly, the first supporting assembly comprises two sets of hinge structures, and the two sets of hinge structures are arranged side by side in the radial direction of the vacuum chamber and are configured into different specifications; the second supporting assembly is supported between the first connecting assembly and the second connecting assembly and comprises two sets of elastic plate arrays, and the two sets of elastic plate arrays are arranged on the two sides of the first supporting assembly in the radial direction of the vacuum chamber. The supporting structure disclosed by the invention not only can stably bear the load of the vacuum chamber in the vertical direction, but also allows the vacuum chamber to generate smaller radial displacement due to baking, and can play a role in stably supporting the vacuum chamber.

The invention discloses a differential mechanism and a vehicle, and relates to the field of new energy automobiles, the differential mechanism comprises a main reduction gear and a straight-line-shaped shaft, an inner hole of the main reduction gear is provided with two opposite seam allowances, each end of the straight-line-shaped shaft is provided with a transmission assembly, and each transmission assembly comprises a planetary gear and a cushion block which are sequentially connected to the end of the straight-line-shaped shaft in a sleeving mode; a through hole is formed in the center of the cushion block, the end of the linear shaft extends out of the cushion block through the through hole, the part, extending out of the cushion block, of one end of the linear shaft is clamped and pressed on one seam allowance, the other end of the linear shaft is clamped and pressed on the other seam allowance, and the face, away from the planetary gear, of the cushion block is fixedly connected with the seam allowances. Wherein the middle of the straight shaft is sleeved with a supporting seat, the two ends of the supporting seat are sleeved with half-axle gears, the half-axle gears are meshed with the planetary gears, and bearings are arranged outside the half-axle gears in a sleeving mode. Through close fit of the cushion blocks and the spigots, it is ensured that the planetary gears cannot generate too large radial displacement when transmitting torque, and the shell-free differential mechanism is achieved.

The invention relates to the field of environmental engineering, and discloses a carbon dioxide geological sequestration leakage early warning device which comprises a box body, multiple sets of connecting columns are installed at the bottom of the box body, the length of the connecting columns is not smaller than 5 m, iron buckets are welded to the outer surfaces of the connecting columns, and communicating holes are formed in the outer surfaces of the connecting columns; the top end of the connecting column is fixedly connected with a sealing cylinder located in an inner cavity of the box body, and a piston is arranged in the sealing cylinder in a sealed and sleeved mode. According to the device, radial displacement (referring to the radial direction of a deep hole) generated by crustal movement in the inner wall of the deep hole in an early warning region is utilized to radially extrude an iron bucket, so that the iron bucket deforms, the volume of an inner cavity of the iron bucket is reduced, transmission oil is forced to upwards push a piston and a connecting plate to apply pressure to a pressure sensor, and crustal stress is sensed through the pressure sensor; compared with real-time monitoring of the carbon dioxide content, the carbon dioxide leakage early-warning method has an obvious early-warning effect.

The invention provides a winding type integrated forming method for a prefabricated small box girder reinforcing steel bar component. The winding type integrated forming method comprises the steps that S1, the structural design of the reinforcing steel bar component is conducted; S2, equipment arrangement is conducted; s3, longitudinal bar material distribution in inner bar manufacturing; s4, inner rib winding manufacturing; s5, mounting a corrugated pipe; S6, manufacturing outer ribs; s7, assembling the steel bar component; and S8, forming the reinforcing steel bar component. The inner ribs and the outer ribs of the whole structure are integrally formed in a winding mode, a double-layer closed-loop combined longitudinal rib connection three-dimensional structure is formed, the structure is closed, the compressive strength of a component can be improved, and the local collapse risk is avoided. The longitudinally-wound steel bars can restrain radial deviation of the longitudinal bars, and the stability is improved by being matched with supporting of the inner bars. When the inner rib and the outer rib are welded, the longitudinal ribs are stretched while rotating, the longitudinally wound steel bars are welded with the longitudinal ribs, point-by-point welding is not needed, only the wound steel bars are welded with the longitudinal ribs, and compared with closed stirrups manufactured in an existing manufacturing mode, the welding workload is greatly reduced, and meanwhile strength loss caused by welding breakpoints is avoided.

The invention discloses a full-circumference self-adaptive anchoring oil well drilling liner hanger, and belongs to the technical field of drilling liner hangers, the full-circumference self-adaptive anchoring oil well drilling liner hanger comprises an outer cylinder, a sleeve is arranged at the bottom of the outer cylinder, a connecting cylinder is arranged at the top of the outer cylinder, a plurality of through grooves are formed in the connecting cylinder, and mounting blocks are slidably arranged in the through grooves; a slip is mounted on the mounting block, and a convex block is mounted outside the slip; one-way linear motion of the connecting frame is converted into synchronous radial expansion motion of the multiple sets of slips through the driving assembly, the slips slide in the through grooves through the mounting blocks, the radial displacement of the slips is determined by the motion stroke of the driving assembly, and the device can effectively adapt to tail pipes with different diameters within a certain range; the universality and field applicability of the tool are improved, a first electric telescopic machine drives a locking pin to be inserted into a locking hole in a vertical plate, the positions of a first moving block and a second moving block can be mechanically locked, and then the whole driving assembly and the slip are fixed.

The invention discloses a superconducting magnet coil bearing framework which comprises a supporting framework used for providing supporting force for a magnet coil in the axial direction of the magnet coil and limiting axial displacement of the magnet coil in the axial direction of the magnet coil; and the magnet coil mounting barrel is fixed on the supporting framework and is used for mounting the magnet coil, providing a supporting force along the radial direction of the magnet coil for the magnet coil and limiting the radial displacement of the magnet coil along the radial direction of the magnet coil. The magnet coil is arranged on the magnet coil mounting barrel, the magnet coil mounting barrel can counteract radial force generated by interaction of the magnet coil, the magnet coil can be prevented from moving in the axial direction of the magnet coil due to the arrangement of the supporting framework, the supporting framework is matched with the magnet coil mounting barrel, and vibration and braking acceleration can be counteracted in the transportation process; swing resonance of the magnet coil is avoided, so that the influence on the magnet coil is reduced, and the stability of the MCZ process is ensured.

The invention provides a dense pre-support structure thin shell mechanical modeling method, and relates to the technical field of tunnel engineering soft stratum pre-support structure mechanical modeling, and the method comprises the steps: calculating the equivalent stiffness of a pipe shed-jet grouting pile composite layer based on a Voigt theory; establishing a continuous thin shell model taking the control equation as a core; constructing a plastic / elastic disturbance partition in front of the tunnel face and a four-section type boundary condition of a supporting structure through a Pasternak foundation model; and solving the constructed continuous thin shell mechanical model through a finite difference method to obtain radial displacement, and completing mechanical modeling of the tunnel engineering soft stratum pre-supporting structure. The continuous thin shell model designed by the invention can provide high-reliability theoretical support for tunnel pre-support design.

The invention discloses a high-temperature and high-pressure rock hollow cylinder torsional shear physical multi-parameter measuring device, and relates to the technical field of rock mass mechanical test equipment. The device comprises a force application oil cavity structure, a confining pressure barrel structure, a force transmission structure and an internal strain testing device, wherein a force application oil cavity is formed in the force application oil cavity structure; the force transmission structure comprises a force transmission shaft, a piston and a combined torque transmission structure; the upper force application oil cavity, the lower force application oil cavity and the top of the inner cavity of the confining pressure barrel are arranged, and the internal strain testing device comprises an LVDT shell, a conversion cone shell and a base shell; one end of each compression probe is contacted with the inner wall of the sample, and the other end radially penetrates through the conversion cone shell and is contacted with the lower end of the conversion cone. Due to the fact that the internal space size of the sample is limited, a radial displacement sensor cannot be placed, and the vertical space is enough, the internal strain testing device capable of converting the internal radial displacement of the rock into the vertical displacement is designed, and the measurement precision of the internal ring strain of the sample is high. The invention also relates to a use method of the measuring device.

The invention discloses a global horizontal displacement monitoring method for an arch dam. The global horizontal displacement monitoring method comprises the step of calculating global horizontal displacement of the arch dam through arch end vector displacement obtained through an arch ring of the arch dam and linear displacement of strain of any point of the arch ring of the arch dam. The linear displacement of any point is calculated through the strain distribution of the full length of the arch ring of the arch dam; arranging inverted pendants at two ends of the arch dam arch ring to obtain arch end vector displacement; the position of any point after deformation is obtained according to the fact that the macroscopic shape of the arch dam is unchanged and continuous, vector displacement can be obtained and further decomposed into radial displacement and tangential displacement, and then monitoring of the global horizontal displacement of the arch dam is achieved.

The invention provides an inductance type displacement sensor of a magnetic suspension bearing and the magnetic suspension bearing, the inductance type displacement sensor of the magnetic suspension bearing comprises a rotating shaft, a first probe and a second probe, the first probe and the second probe are both located on the periphery of the rotating shaft, the rotating shaft has an axis direction, and the first probe and the second probe are arranged in the axis direction. The first probe is located at a first axial position, the second probe is located at a second axial position, and the second axial position and the first axial position are spaced or connected in the axis direction; the first probe can detect the axial displacement and the radial displacement of the rotating shaft, and the second probe can detect the radial displacement of the rotating shaft so as to compare and compensate the radial displacement, detected by the first probe, of the rotating shaft. According to the invention, the interference of axial displacement on the radial detection of the first probe (wedge-shaped probe) can be reduced, the detection error is reduced, and the precision of axial and radial displacement detection is improved.

The utility model discloses a photoelectric platform stabilizing device, the utility model relates to photoelectric platform technical field, including base, the middle part fixedly connected with fixed block in the base inner wall, the fixed block inner wall fixedly connected with first motor, the output end transmission of first motor has the rotary disc, the upper surface fixedly connected with stabilizing device of rotary disc. This photoelectric platform stabilizing device, through setting stabilizing device, positive and negative toothed rod cooperation limiting rod drive clamping stable frame synchronous relative motion can realize even clamping to different size photoelectric equipment, avoid equipment to shake, the cover plate further prevents equipment from falling off, ensure that the equipment is fixed in the position in the working process, when the first motor drives the rotary disc to rotate, the limiting ring on fixed plate and the limiting block under rotary disc accurate adaptation, limit the radial displacement of rotary disc, reduce the shake, guarantee the stability when azimuth adjustment.

The invention relates to a double-station welding robot which comprises a robot unit and a workpiece fixing unit and is used for welding a pipeline and flange plates at the two ends. Two welding devices are arranged on a connecting plate of the robot unit at intervals, a fixed rack and a movable rack of the workpiece fixing unit are each provided with a claw disc assembly, a double-station clamping structure is formed, two sets of workpieces can be synchronously clamped and welded, waiting for completion of a single set is not needed, and the idle time and the production period of equipment are greatly shortened. The movable rack can slide along the linear sliding table seat to adapt to pipelines with different lengths, so that the operation continuity is guaranteed; the clamping assembly is of a double-positioning structure of an inner diameter supporting block and an outer diameter pressing block, three sets of grippers are evenly distributed along the circumference of a claw disc, the driving device can drive the supporting block to externally support the inner wall of a pipeline and drive the pressing block to internally press the outer wall of a flange disc, a workpiece is synchronously positioned and fixed, radial displacement and circumferential rotation are effectively limited, and coaxiality and assembly precision are guaranteed. Welding defects caused by loose clamping are avoided, the quality and the qualified rate of joints are improved, and it is ensured that workpieces meet the sealing and strength requirements.