180results about How to "High displacement accuracy" patented technology

A high-speed three-dimensional imaging system includes a single lens camera subsystem with an active imaging element and CCD element, and a correlation processing subsystem. The active imaging element can be a rotating aperture which allows adjustable non-equilateral spacing between defocused images to achieve greater depth of field and higher sub-pixel displacement accuracy. A speckle pattern is projected onto an object and images of the resulting pattern are acquired from multiple angles. The images are locally cross-correlated using a sparse array image correlation technique and the surface is resolved by using relative camera position information to calculate the three-dimensional coordinates of each locally correlated region. Increased resolution and accuracy are provided by recursively correlating the images down to the level of individual points of light and using the Gaussian nature of the projected speckle pattern to determine subpixel displacement between images. Processing is done at very high-speeds by compressing the images before they are correlated. Correlation errors are eliminated during processing by a technique based on the multiplication of correlation table elements from one or more adjacent regions.

A high-speed three-dimensional imaging system includes a single lens camera subsystem with an active imaging element and CCD element, and a correlation processing subsystem. The active imaging element can be a rotating aperture which allows adjustable non-equilateral spacing between defocused images to achieve greater depth of field and higher sub-pixel displacement accuracy. A speckle pattern is projected onto an object and images of the resulting pattern are acquired from multiple angles. The images are locally cross-correlated using a sparse array image correlation technique and the surface is resolved by using relative camera position information to calculate the three-dimensional coordinates of each locally correlated region. Increased resolution and accuracy are provided by recursively correlating the images down to the level of individual points of light and using the Gaussian nature of the projected speckle pattern to determine subpixel displacement between images. Processing is done at very high-speeds by compressing the images before they are correlated. Correlation errors are eliminated during processing by a technique based on the multiplication of correlation table elements from one or more adjacent regions.

The invention discloses a long-stroke fast tool servo device. The long-stroke fast tool servo device comprises a machine frame, a piezoelectric ceramic driver which is arranged on the machine frame and can achieve axial telescoping, an input block which abuts against the tail end of the piezoelectric ceramic driver and is driven by the piezoelectric ceramic driver to make linear movement, a tool rest used for mounting a tool, and a displacement magnification mechanism which is connected between the input block and the tool rest and used for magnifying and transferring the displacement of the piezoelectric ceramic driver to the tool rest. The overall structure of the displacement magnification mechanism is symmetrical by using the piezoelectric ceramic driver as the axis of symmetry. According to the long-stroke fast tool servo device disclosed by the invention, the piezoelectric ceramic driver is used for driving the tool to make displacement, and high displacement accuracy is guaranteed; meanwhile, the displacement of the piezoelectric ceramic driver is increased through the displacement magnification mechanism, so that the tool has a large displacement stroke; and the influence factors on the axial displacement of the tool are removed through the axisymmetric structure of the displacement magnification mechanism, and the displacement accuracy of the tool under the long-stroke condition is further improved.

The invention relates to a surrounding rock separation layer displacement monitor. The surrounding rock separation layer displacement monitor comprises mechanical parts and electrical parts. The mechanical parts comprise an anchor rod assembly, a first transmission mechanism, a second transmission mechanism, a first shell, and two separation layer displacement transferring assemblies which are basically arranged in the anchor rod assembly. The anchor rod assembly is fixed on the first shell; the first transmission mechanism and the second transmission mechanism are both arranged in the first shell basically; and power output pieces of the two separation layer displacement transferring assemblies are in dynamic connection with power input pieces of the first transmission mechanism and the second transmission mechanism respectively. The electrical parts comprise a second shell, a circuit board fixed in the second shell, a first angular transducer and a second angular transducer and the like. The edge of a left side plate of the first shell is provided with 3 to 6 pin hook assemblies, and pin holes are formed at the corresponding positions of a right side plate of the second shell. The first shell is inserted into and hooks the pin holes of the second shell through the pin hook assemblies and is connected with the pin holes. The power output pieces of the first and second transmission mechanisms are connected with the first and second angular transducers respectively.

The present invention discloses a wide field super-resolution microscopic imaging method based on total internal reflection structure illumination. The wide field super-resolution microscopic imaging method comprises that a laser beam is divided into two linearly polarized light beams having symmetrical propagation directions and perpendicular vibration directions; the two linearly polarized light beams are converted into two tangential linearly polarized light beams, the two tangential linearly polarized light beams are projected on a fluorescent sample, total reflection is generated and mutual interference is generated to produce a fringe structure illumination pattern; the fluorescent signal emitted by the sample is collected to obtain fluorescent intensity information; by sequentially rotating the direction of the interference fringe of the structure illumination pattern, the phase of the interference fringe is changed a plurality of times in various directions to obtain a plurality of fluorescent intensity images under the corresponding phases in various directions; and data processing is performed on the plurality of the fluorescent intensity images, and re-construction is performed to obtain the super-resolution image. The present invention further discloses a wide field super-resolution microscopic imaging apparatus based on total internal reflection structure illumination. According to the present invention, the incident light energy utilization rate is high, the interference fringe contrast is high, and the resolution exceeding the diffraction limit under the low incident light power condition can be achieved.

The invention discloses a device and a method for alignment measurement and adjustment of a particle image velocimetry (PIV) camera of a centrifugal pump. The device and the method are used for alignment measurement and adjustment of camera shooting gesture in a centrifugal pump PIV internal flow experiment and relate to the field of fluid experiments. The device comprises a camera alignment measurement and adjustment frame, a model pump, the camera and a computer. The camera alignment measurement and adjustment frame comprises a movable base, an X-direction adjustment frame, a Y-direction adjustment frame, a Z-direction adjustment frame, an X-coordinate scale plate, a Y-coordinate scale plate, a Z-coordinate scale plate, a vernier angle ruler and a rotating base. A demarcation card is arranged on the surface of a test window of the model pump. The camera alignment measurement and adjustment frame can be utilized to accurately measure and adjust camera shooting gesture which can be accurately adjusted by measuring demarcation card images shot by the camera to enable a shooting plane and a test plane of the camera to coincide. The method is simple, easy to achieve and high in generality and provides an effectively way for alignment measurement and adjustment of PIV camera shooting gesture of the centrifugal pump.

The invention relates to a biological molecule detecting system combing a micro-fluidic chip with a micro-valve and quartz crystal microbalance (QCM). The system is characterized in that a shock-proof and ant-static platform is provided with the micro-fluidic chip with the micro-valve and a precise thermostatic chamber connected with the QCM; a sample in the micro-fluidic chip controls the micro-valve to open and close in an intermittent mode through airflow formed by a vacuum pump and an air inlet system controlled by an electromagnetic valve; the QCM is connected with a data collecting device through a frequency collector and arranged on a three-dimensional moving device with X, Y and Z directions; the center of the QCM is precisely abutted with a sample outlet of the micro-fluidic chip with the micro-valve for sampling; after the adsorption of the sample, a minitype water pump sweeps non-adsorbed sample, an air inlet device blows and dries the sample, and the QCM changes the frequency to detect certain biological molecules; the data collecting device is connected with the frequency collector, the precise thermostatic chamber, the electromagnetic valve control device and the three-dimensional moving device with X, Y and Z directions. The system has the functions of preprocessing sample and fast and conveniently detecting biological molecules.

Provided is an automatic / semi automatic measurement method of steel hardenability curve and a device thereof, through controlling displacement of a standard test bar and hardness measurement of a hardness meter by a computer, meanwhile hardness data obtained by the hardness meter is uploaded to the computer, only a sample is fixed on a sample holder, the computer automatically moves the sample holding mechanism to a corresponding position according to the given measurement position in advance, for automatically measuring the hardness, after testing one test point, the computer sends out displacement control command, goes on measuring the hardness of other places in turn, finally, the computer automatically plots the hardenability curve, and computes the hardness of the special points. The automatic / semi automatic way is adopted to read the measurement data and the data are input to the computer, thereby greatly relieving workload of testers, increasing working efficiency and ensuring accuracy of data.

The invention discloses a film loading device which comprise a bracket, a lever assembly, piezoelectric ceramic, a first clamping piece, a second clamping piece and a sensor, wherein the lever assembly comprises a movable rod which is rotatably arranged on the bracket around a preset point; the piezoelectric ceramic is connected with the movable rod for inputting initial displacement to the movable rod; the first clamping piece is connected with the movable rod; the first clamping piece is used for clamping the first end of a film and the second clamping piece is used for clamping the second of the film; the distance from the joint of the first clamping piece and the movable rod to the preset point is longer than the distance from the joint of the piezoelectric ceramic and the movable rod to the preset joint; and the sensor is used for measuring tensile force applied to the film, is arranged on the bracket and is connected with the second clamping piece. The film loading device provided by the invention is high in loading placement accuracy, rapid to respond, large in output displacement and simple in structure.

An optical displacement gage includes the phase determining unit includes a relative phase deciding unit to decide a relative phase of the frequency component within a range of 360 degrees, an absolute phase computing unit to compute an absolute phase by combining the relative phase based on the decision result by the relative phase deciding unit and the past decision result by the relative phase, and a phase reference updating unit to update a reference point of the absolute phase based on a reset instruction, and the displacement amount deciding unit decides the displacement amount based on the absolute phase.

The invention discloses a multi-driven three-degree-of-freedom leaf spring type micro-nano operating platform and method. The platform comprises a mobile platform for placing a mobile object, wherein driving mechanisms are arranged at four corners or extended edges of four edges of the mobile platform; the driving mechanisms are arranged in the positions of four corners in a quadrangle shape; one of the driving mechanisms is matched with another one to drive the mobile platform to move in X-axis or Y-axis and rotate around Z-axis; each driving mechanism comprises a guide leaf spring connected to the mobile platform, the guide leaf spring is connected to a driving power source, and at least one auxiliary leaf spring is arranged on each side of the guide leaf spring. The platform disclosed by the invention has he beneficial effects that as four leaf spring units are circumferentially arranged, the rotating degree of freedom of the mobile platform around the Z-axis can be realized, so that the range of application of the micro-nano operating platform is expanded; meanwhile, by way of an overdrive design mode, transmission errors caused by errors of structural shapes due to machining errors can be effectively overcome.

The invention provides a printed circuit board automatic optical detection method. The printed circuit board automatic optical detection method comprises 1, fixing a printed circuit board to be detected onto a working face of a first objective table by a vacuum adsorption method, 2, horizontally moving a second objective table to a position above the first objective table by a horizontal displacement electric cylinder, and simultaneously, carrying out optical detection on the upper surface of the printed circuit board to be detected by an optical module on the second objective table in movement, 3, vertically moving the second objective table by a vertical displacement electric cylinder so that the second objective table contacts with the printed circuit board to be detected, and fixing the printed circuit board to be detected to a working face of the second objective table by a vacuum adsorption method, and 4, horizontally moving the second objective table by the horizontal displacement electric cylinder and simultaneously, carrying out optical detection on the lower surface of the printed circuit board to be detected by an optical module on the first objective table in movement.

Provided in the invention is a symmetric differential-lever micro displacement amplification apparatus comprising a pedestal, a base plate fixed on the pedestal, a piezoelectric block. The piezoelectric block and the substrate are located at the same plane. The piezoelectric block has a top pressing part and two transmission parts that are respectively arranged at the two ends of the top pressing part and are arranged symmetrically by using the midperpendicular of the top pressing part as the center; each of the two transmission parts is respectively connected with one group of lever assemblies located at the same plane as the substrate; and the two lever assemblies are arranged symmetrically by using the midperpendicular of the top pressing part as the center. A piezoelectric ceramic driver abutted against the top pressing part is arranged between the two transmission parts. With the lever assemblies, a large displacement enlargement factor can be realized based on a differential lever amplification principle; and the stroke is also large. Meanwhile, because of connection based on flexible hinging, gaps and friction forces among all levers are small, thereby reducing the error and improving the precision.

The invention discloses a forming cylinder system structure in SLM rapid forming equipment. According to the forming cylinder system structure in the SLM rapid forming equipment, a lifting mechanism is driven by the corresponding servo motor, a ball screw nut pair is driven by a right-angle speed reducer to move, then up-down movement of a preheating system structure is achieved, and the relevantthickness of the powder laying layer is controlled. The preheating system structure heats a base plate through a cast aluminum heating plate, a thermocouple is adopted as a temperature sensor, real-time control over the temperature is achieved, heat insulation silk floss and a heat insulation plate are additionally arranged below the heating plate for relevant heat insulation, and sealing rubber strips are installed on the side edges of the base plate and the heat insulation plate to prevent machined metal powder from falling along a forming cavity. According to the forming cylinder system structure in the SLM rapid forming equipment, the lifting mechanism is used for accurately controlling the thickness of the powder laying layer, the preheating system structure is used for accurately controlling the machining temperature of the metal part, the machining environment of the whole metal part is optimized, and the machining surface quality of the metal part is controlled and improved.

The invention discloses a detector for the three-dimensional deformation precision of an intelligent driving type measuring instrument and a detection method. The detector comprises a platform, a guide rail system, a driving system connected with the guide rail system, a control system used for controlling the driving system and a detection platform which is arranged on the guide rail system and used for installing a measuring instrument. The detection method comprises the steps of first, acquiring initial actual measurement coordinates and resetting initial display coordinates to zero; second, adjusting the three-dimensional deformation precision detector; third, acquiring nth actual measurement coordinates and nth display coordinates; fourth, calculating a current actual measurement coordinate variation, a current display coordinate variation and a current difference; fifth, performing data storage; sixth, repeating the step two to the step five for n times; and seventh, calculating the precision of the measuring instrument. The detector is simple in structure and reasonable in design, the coordinate displacement of the measuring instrument in a three-dimensional space is adjusted by adopting an intelligent control driving device, and the reliability and the accuracy of the measurement precision of the measuring instrument while three-dimensional deformation monitoring is performed are detected.

The present invention provides a bending machine for an OLED screen test. The bending machine comprises a cabinet body, a bending mechanism and a pressure sensor; the cabinet body is provided with thebending mechanism and the pressure sensor; the bending mechanism comprises ballast tables, a placement table and a moving device; the ballast tables are arranged on both sides of the placement table;the moving device comprises a plurality of moving components, which are lateral moving components and vertical moving components respectively; the ballast tables are connected with the lateral movingcomponents to achieve left and right movement of the ballast tables; the placement table is connected with the vertical moving components to achieve up and down movement of the placement table; and the pressure sensor is arranged below the placement table and is configured to test the pressure when an OLED screen is bent. According to the bending machine for the OLED screen test provided by the present invention, the versatility is strong, bending on both sides can be realized, the bending experiment efficiency is higher, the experimental result is more stable and objective, the bending machine is compatible with the OLED screen, and a large size span is achieved.

The invention relates to a stress monitoring-based fiber / polymer interfacial shear crystallization on-line detector. According to the detector, fibers are drawn in semi-crystalline polymer melt, and interfacial stress and an interfacial crystallization process are monitored on line to obtain relation among a drawing rate, interfacial shear stress, interfacial crystallization morphology and a polycrystalline state. The detector has the characteristics of high integration degree, high displacement accuracy, capability of monitoring the interfacial shear stress and the interfacial crystalline morphology in real time and the like. The drawing speed is accurate and stable to control, the interfacial shear stress is measured through a force measuring sensor, and variation in interfacial crystallization morphology is recorded through a polarizing microscope in real time; and meanwhile, data and images are acquired and processed through a computer. The interfacial shear stress introduced by drawing the fibers is compared with the corresponding crystallization morphology, and shear induced polymer crystallization is quantitatively and deeply researched.

The invention provides an unreeling device and a laminating machine and relates to the technical field of lithium battery manufacturing equipment. The unreeling device comprises an unreeling mechanismfor releasing a diaphragm in a material coil, a tension control mechanism for adjusting the tension of the transported diaphragm, a caching mechanism for caching the transported diaphragm, and a plurality of via rollers for guiding, supporting and tensioning the transported diaphragm. The diaphragm released by the unreeling mechanism enters a laminating mechanism through the via rollers, the tension control mechanism and the caching mechanism and the laminating mechanism drives the diaphragm to move in a reciprocating manner to laminate in a Z shape. The laminating machine comprises the unreeling device. The invention aims to provide the unreeling device and the laminating machine to alleviate the problem that the laminating efficiency is affected when the tension of the diaphragm is controlled improperly in the prior art.

The invention discloses a control method and a device for a magnetic suspension bearing. The control method for the magnetic suspension bearing comprises steps that, a speed feedback value of a rotation shaft center in a magnetic suspension bearing system is acquired; a speed reference value of the rotation shaft center is acquired; adjustment on the speed of the rotation shaft center is carried out according to the speed feedback value and the speed reference value. Through the method, displacement precision of the magnetic suspension system is improved.

The invention discloses a diaphragm protective plate component for a mechanical diaphragm metering pump, in particular relating to a multi-curved surface diaphragm protective plate. The multi-curved surface diaphragm protective plate comprises a diaphragm supporting plate matched with a composite diaphragm in working; the composite diaphragm and the diaphragm supporting plate are provided with opposite plane parts, and a projecting curved surface portion is formed at the joint of the edges of the composite diaphragm and the diaphragm supporting plate; and the edge of the diaphragm supporting plate is provided with a concave curved surface structure matched with the projecting curved surface portion of the composite diaphragm. The multi-curved surface diaphragm protective plate is capable of reducing sliding friction between the composite diaphragm and the diaphragm supporting plate, thereby reducing the abrasion of the composite diaphragm and prolonging the service life of the composite diaphragm; furthermore, the multi-curved surface diaphragm protective plate is capable of effectively reducing elastic deformation of the composite diaphragm and improving the displacement accuracy.

The invention discloses an electric robot tail end quick change device. The electric robot tail end quick change device comprises a robot side disk and a tool side disk which are connected, a transmission groove is formed in the end surface, facing the tool side disk, of the robot side disk, and a locking groove is formed in the end surface, facing the transmission groove, of the tool side disk correspondingly. A main shaft is rotatably connected into the transmission groove, the transmission groove is further provided with a transmission mechanism, the transmission mechanism connects the mainshaft with a motor in a transmission mode, and the motor is fixed to the robot side disk. A locking device is arranged in the locking groove, and the main shaft drives the locking device to control the locking and unlocking of the robot side disk and the tool side disk. According to the electric robot tail end quick change device, the motor drives a push plate to realize the locking, fixing, disassembling and separating of the robot side disk and the tool side disk, and the locking and fixing and disassembling and separating efficiency of the quick change device is improved.

The invention discloses an all-dimensional wheeled mobile robot chassis. The chassis comprises wheels, a suspension unit, a transmission unit, a driving unit, a chassis frame and a power unit. Mecanumwheels are adopted as the wheels of a robot, compared with other wheels, the Mecanum wheels can achieve pivot steering, translation and pozidriv walking, and the turning radius of the robot is greatly reduced, so that the robot is more flexible and passes through the narrow and small space conveniently; each wheel is provided with an independent driving motor, and a 57 stepping motor and a speedreducer are adopted, so that the robot is high in displacement precision and has point fixing and positioning effects; the mobile robot bears a heavy load, can bear a weight of 100 kg and is high in slope climbing capacity and driving force; each wheel is provided with an independent damping unit, the wheels cannot influence one another on the uneven ground, so that the robot keeps stable, the damping effect is improved, and accordingly the capacity of getting rid of the difficulty is improved.

The invention discloses an adjustable pressure distortion simulator and a transmission device of the adjustable pressure distortion simulator. The transmission device is used for moving distortion simulation inserting plate assemblies and comprises a stepping motor, a first bevel gear, a second bevel gear, a worm assembly, a lead screw, a lead screw nut and a guiding rod, the first bevel gear is driven by the stepping motor, the second bevel gear is matched with the first bevel gear, the worm assembly and the second bevel gear are connected and synchronously move, the lead screw is transmitted by the worm assembly through a worm wheel, the lead screw nut is matched to the lead screw, the guiding rod is parallel to the lead screw, the guiding rod is connected with the distortion simulation inserting plate assemblies through a linear bearing movably arranged on the guiding rod in a sleeved mode, and the lead screw nut drives the linear bearing and the distortion simulation inserting plate assemblies to move up and down when the lead screw rotates. The transmission device is reliable in structure, small in space size, high in displacement accuracy and high in use reliability.

An electronic shogging control system used in the warp knitting industry comprises an industrial personal computer, a shogging controller, a photoelectric encoder, a motion controller, a stepping actuator, a stepping motor and a pattern guide bar. The motion controller is used for converting process data transmitted from the shogging controller to impulse control signals and direction control signals and driving and controlling the stepping actuator to move, wherein the impulse control signals and the direction control signals have a specific rule. The stepping actuator drives the stepping motor to move according to the impulse control signals of the motion controller and the direction control signals of the motion controller, a lead screw is connected to the output end of the stepping motor, and a nut matched with the lead screw is arranged on the pattern guide bar. The invention further discloses an electronic shogging control method used in the warp knitting industry. The electronic shogging control system used in the warp knitting industry is simple in structure, low in failure rate, high in displacement precision and easy to maintain, the operating speed of the system is 1.5-2 times faster than the shogging speed of an electronic machine, and the price of the system is only one third of that of a shogging control system of a servo motor.

The invention relates to a large vacuum hot-pressing furnace which comprises a furnace body framework, a vacuum chamber, an upper molybdenum press head sample table, a lower molybdenum press head sample table, a hydraulic system, a vacuum obtaining system and a heating chamber. The upper molybdenum press head sample table and the lower molybdenum press head sample table are respectively arranged on the upper portion and the lower portion in the vacuum chamber. The lower molybdenum press head sample table is supported by four molybdenum columns. Six-zone temperature control heating is adopted for the heating chamber. A heating chamber metal heat-insulating reflection screen is composed of molybdenum screens and stainless steel screens. The hydraulic system is arranged at the upper end of the furnace body framework. According to the large vacuum hot-pressing furnace, the molybdenum screens and the stainless steel screens are used for shielding in the periphery of the heating chamber, and the six-zone temperature control heating is adopted, so that the heating evenness of the heating chamber is improved, the temperature control precision is +-1DEG C, and the mean temperature of the heating chamber is +-2 DEG C; the displacement precision of the hydraulic system reaches 0.015mm, and the largest tonnage of a hydraulic punch is 200 tons. The large vacuum hot-pressing furnace is favorable for machining precise instruments and large components and has the advantages of being good in heating evenness, high in temperature control precision, quick in temperature rise, high in hydraulic precision, and the like.

The invention discloses a towel rack automatic welding machine. The towel rack automatic welding machine comprises a rack. Mounting blocks are fixed to the two sides of the upper end of the rack, guide rails are fixed to the upper ends of the mounting blocks, sliding blocks slide on the guide rails, a carrying frame is fixed to the upper ends of the sliding blocks, a positioning and pressing mechanism is arranged in the middle of the carrying frame, a first servo motor is mounted on the upper side of one end of the carrying frame, the end of an output shaft of the first servo motor is in key connection with a gear, the gear is located below the carrying frame, a rack is engaged with one side of the gear, the rack is fixed to the side faces of the mounting blocks, a supporting frame is arranged in the middle of the rear side of the rack, a moving mechanism is arranged at the upper end of the supporting frame, an air cylinder mounting frame is arranged on the moving mechanism, a first air cylinder is mounted on the air cylinder mounting frame, a mounting plate is fixed to the end of a piston rod of the first air cylinder, and a welding head is mounted on the lower side of the mounting plate. Towel rack accessories are positioned and automatically pressed, the position is automatically changed, the working efficiency is high, and the machining quality is good.

The invention discloses a tank entering and exiting system. A cart girder which can be shifted is arranged above electrolytic tanks arranged to form an array, and a circular track is arranged on the cart girder. The circular track is movably provided with a plurality of liftable mechanical arms, and a feeding and discharging area a, a tank area b to be entered, a tank entering and exiting workingarea c and a discharging passivation area d are arranged on the circular track and on the side of the circular track. The mechanical arms move along the circular track to work, N electrolytic tanks are arranged in a row, and the whole system is provided with N+1 mechanical arms and a positioning device. The first mechanical arm entering the system is only responsible for removing a negative plate,the last mechanical arm is only responsible for inserting the negative plate, and all the mechanical arms in the middle complete two jobs of the insertion of a tank position negative plate and the extraction of the next tank position negative plate, namely all the mechanical arms working twice in one working period. Compared with the previous process that each mechanical arm only works once in one working period, the working efficiency is significantly improved.

The invention provides OLED screen bending testing equipment and testing method. The testing equipment comprises a cabinet body and a bending mechanism, wherein the bending mechanism comprises a mobile device, a placement carrying platform, a bending device and a tension sensing device; the placement carrying platform comprises a carrying platform I and a carrying platform II for fixing the two ends of an OLED flexible screen; the mobile device, the bending device and the tension sensing device are arranged between the carrying platform I and the carrying platform II; the bending device is fixed on the mobile device; the bending device comprises a bending roller; the tension sensing device comprises a tension sensor, a tension control shaft and an angle control shaft; the angle control shaft is located below the bending roller and is located on one side of the tension control shaft; and the two ends of the tension control shaft and the tension sensor are fixedly connected on the mobiledevice, so that left and right movement is achieved. The OLED screen bending testing equipment and testing method have the advantages that the bending experiment efficiency is higher, the experimental result is more stable and objective, the displacement precision is high, and the universality is high.

The invention provides a three-degree-of-freedom micro-positioning platform based on a symmetrical double compliant hinge. The three-degree-of-freedom micro-positioning platform comprises fixed platforms, a movable platform, drivers and three lever amplifying mechanisms, wherein the drivers are arranged on the fixed platforms; the three lever amplifying mechanisms are used for connecting the fixed platforms with the movable platform; the three lever amplifying mechanisms are uniformly distributed on the periphery of the movable platform, and connected with the fixed platforms, the movable platform and the drivers respectively; each lever amplifying mechanism comprises a movable lever, a double compliant hinge and a guide mechanism which is provided with the double compliant hinge; the movable levers are connected with the fixed platforms and the drivers respectively through the double compliant hinges, and connected with the movable platform through the guide mechanisms; and the double compliant hinges are symmetrical double compliant hinges. Through adoption of the micro-positioning platform, the displacement positioning accuracy can be increased and travel being as large as possible is obtained on the premise thatvarious conditions such as installation space and fixed frequency are satisfied. The micro-positioning platform has a function of correcting a displacement output, and displacement is output as linearly as possible, so that coupled displacement is reduced.

The invention discloses welding and shifting equipment for a numerically-controlled machine tool, and relates to the field of engineering machines. The welding and shifting equipment comprises a rack pressing mechanism, a left-right locating mechanism, a side plate locating mechanism, a workbench, a side plate pressing mechanism, the numerically-controlled machine tool and a controller. The workbench is arranged on the numerically-controlled machine tool, the left-right locating mechanism and the side plate pressing mechanism are arranged on the periphery of the side plate locating mechanism, the rack pressing mechanism is arranged on the left-right locating mechanism, the left-right locating mechanism, the side plate locating mechanism and the side plate pressing mechanism are all arranged on the workbench, and the rack pressing mechanism comprises a pressing rod and an air cylinder connected with the pressing rod. The air cylinder and other automatic executing elements can be controlled by the controller, the welding and shifting equipment for the numerically-controlled machine tool is provided for the field of engineering machines, and is high in workpiece assembly precision and good in workpiece assembly consistency, the labor intensity of operators is fully lowered, and production efficiency is fully improved.