8850results about "Mechanical measuring arrangements" patented technology

The invention discloses a state transition pump shaft simulation load run-out detection system which comprises a pump, a dial indicator and a pull and push dynamometer. The pump shaft is provided with a driving disc and a stress disc, and the driving disc, the pump shaft and the stress disc are located on the same central axis. The dial indicator can be selectively configured in a radial run-out detection state by adjusting the position of the dial indicator and the direction of a measuring head, wherein the measuring head is perpendicular to the central axis and abuts against the outer circumferential surface of the pump shaft; in the axial run-out detection state, the measuring head is overlapped or parallel to the central axis and abuts against the axial end face of the pump shaft; the push-pull dynamometer can be selectively configured in a radial force application state by adjusting the position of the push-pull dynamometer and the direction of a force application end, wherein the force application end is perpendicular to the central axis and abuts against the outer circumferential surface of the stress disc, and a radial simulation load is applied; in the axial force application state, the force application end is parallel to the central axis and abuts against the disc end face of the stress disc, and an axial simulation load is applied. Through the state conversion of the same detection and force application device, the radial and axial runout integrated detection of the pump shaft under the simulated load is realized.

The invention belongs to the technical field of PCB detection, and particularly relates to a probe tip deviation compensation method, system and equipment, and the method comprises the steps: building a reference coordinate system, controlling a probe swing arm to rotate to a vertical position and a horizontal position respectively, and employing a bonding pad combination on a special calibration plate to calibrate the probe tip deviation. An electric signal detection mode is adopted to accurately measure the deviation value of the needle point in the X-axis direction and the Y-axis direction, and the position of the probe is automatically compensated according to the deviation value. The system comprises a high-precision driving module, a visual positioning module and a signal acquisition module, and realizes a full-automatic calibration process. According to the method, a horizontal and vertical double-position detection mode is innovatively adopted, complex angle calculation is avoided, the calibration efficiency and precision are greatly improved, the problem of needle point position deviation caused by mechanical errors and long-term use in a traditional method is effectively solved, the measurement precision of PCB detection equipment is remarkably improved, and the detection precision of the PCB detection equipment is greatly improved. Meanwhile, the maintenance cost and the operation difficulty are reduced, and the method is suitable for the field of high-precision PCB detection.

A board diagonal measurement system and method suitable for multiple specifications of gypsum boards (1). The system comprises a cross-type guide rail (2), diagonal point positioning members (3), and a driving structure (4); the cross-type guide rail (2) is composed of two sliding rails (21) crossing each other; the driving structure (4) is used for driving the two sliding rails (21) to rotate, so that the sliding rails (21) keep parallel to diagonals of a gypsum board (1) having a corresponding size, wherein in an initial state, a rectangular area formed by connecting position points where the diagonal point positioning members (3) are located is located outside the gypsum board (1). The cross-type guide rail (2) is arranged above a conveyor belt (5), the sliding rails (21) keep parallel to the diagonals of the gypsum board (1) having the corresponding size, the positions of the diagonal point positioning members (3) also change along with the sliding rails, so that the length and the width of the rectangular area are adjusted, and the rectangular area which is inwardly contracted and then completes positioning of the gypsum board is just matched with the specification of the gypsum board (1). The present invention is suitable for diagonal measurement of the multiple specifications of gypsum boards (1).

The invention discloses size detection equipment for casting perforation processing, and relates to the technical field of size measurement. The device comprises a base, a supporting plate and a displacement assembly. The detection part goes deep into a workpiece hole through the contact ball, and the laser emitter and the light sensor are used for detecting the contact position, thereby realizing high-precision size measurement. The displacement assembly adopts the design of a negative pressure rotating cylinder and a resistance sliding rod, adjusts the displacement of a contact ball according to the rotating speed, and flexibly adapts to different hole requirements. Through the control of the planetary gear and the electromagnet, the contact ball can rotate to realize multi-angle detection. The detection table is driven by a central electric cylinder and an edge inclination control electric cylinder to stably adjust the posture of a workpiece. The device is high in automation degree and convenient to operate, and overcomes the defects of low precision, poor efficiency and single-direction detection of traditional manual measurement.

The invention relates to the technical field of palm fiber testing, in particular to a palm fiber bending elasticity testing device based on multi-angle adjustment, which comprises a clamping device, a point position adjusting assembly, an angle adjusting assembly and a loading device, the clamping device is arranged above the electronic scale; the point location adjusting assembly is connected with the base; the angle adjusting assembly is connected with the clamping device; the loading device is connected with the point location adjusting assembly; through the point position adjusting assembly and the angle adjusting assembly, bending elasticity testing of different point positions and different angles can be achieved, in the testing process, the loading assembly can drive the clamping assembly to increase the clamping force on the palm fibers along with increase of the bending variation of the palm fibers, it is guaranteed that the palm fibers do not slip or twist in the testing process, and the detection precision is improved; the problems that in the palm fiber testing process, torsion and slippage can occur along with the increase of the bending amount, so that the testing result is inaccurate, and single-point single-angle testing cannot reflect the elasticity of the palm fiber practically are solved.

The invention discloses a coordinate measuring machine and a coordinate measuring method, the coordinate measuring machine comprises a rack, a workbench, a moving frame and a measuring assembly, the workbench is arranged on the rack and is used for placing a workpiece to be measured; the measuring assembly comprises a laser scanning measuring head and a contact type measuring head, the laser scanning measuring head and the contact type measuring head are both arranged on the moving frame, the laser scanning measuring head is used for conducting non-contact type three-dimensional scanning measurement on the workpiece to be measured, and the contact type measuring head is used for conducting contact type precision measurement on the workpiece to be measured; wherein the movable frame can move relative to the to-be-measured workpiece so as to drive the contact type measuring head to be in contact with the to-be-measured workpiece for measurement, or drive the laser scanning measuring head to carry out scanning measurement under the condition that the laser scanning measuring head is not in contact with the to-be-measured workpiece. According to the technical scheme, the laser scanning measuring head and the contact type measuring head are integrated on the same coordinate measuring machine, seamless switching between non-contact type rapid scanning and contact type precision measurement is achieved, and the flexibility and efficiency of measurement are greatly improved.

The invention relates to a coordinate measuring machine with a ram anda probe head ora sensor oran articulating head / unit orwith an articulating head / unit with a probe head or sensor positioned on the articulating head / unitand / orwith an interfacein which the probe head or the sensor or an adapter for the articulating head / unit and / or the interface is / are positioned at least partially in the ram.

The invention relates to the technical field of gear shaft bending amount detection, in particular to a detection device for measuring gear shaft gear reference circle bending amount, which comprises a workbench, and a floating support block and a fixed support block for horizontally supporting a gear shaft are mounted on the workbench. A driven center seat assembly and a driving center seat assembly which are used for axially fixing and rotationally driving the gear shaft are further mounted, and meanwhile, a laser sensor assembly and a plurality of displacement sensor assemblies are further mounted, and the displacement sensor assemblies are located on the outer side of the optical axis of the gear shaft and the round end faces of ejector pin heads at the two ends; the laser sensor assembly is located on the outer side of a gear of the gear shaft and used for measuring the bending amount and the bending angle of the gear shaft. The device can solve the problem that it is difficult to detect internal points of the gear on the gear shaft to reflect the bending amount of the gear at present, and compared with a previous shaft part detection device, the device has the advantages of being high in detection precision, capable of achieving automatic detection, quite suitable for the transportation rhythm of a shaft part production line, safe, reliable and the like.

The invention discloses a multi-modal measurement system and method of a three-coordinate measuring machine, relates to the cross technical field of precision measurement, computer vision and intelligent manufacturing, and is used for solving the problems of low automation degree, strong subjective dependence and lack of assembly performance prediction capability in automobile covering part characteristic line detection. According to the method, point cloud data and positioning coordinates are synchronously collected through a multi-mode sensor, and a fusion point cloud sequence is generated through time sequence synchronization; constructing a high-precision three-dimensional point cloud model through noise filtering, registration and curved surface reconstruction; automatically extracting a feature line path based on curvature analysis and generating an analysis section; calculating a sharpness index through contour fitting, and generating a quality evaluation coefficient in combination with a CAD ideal model contour tolerance deviation; and finally, defects are identified through virtual assembly analysis, a sensor remeasurement path instruction is generated, and a quality report is output in combination with a quality coefficient, so that the detection precision, the efficiency and the assembly quality prediction capability in the measurement process of the three-coordinate measuring machine are improved.

The invention belongs to the technical field of laser measuring devices, particularly relates to a steel structure building fireproof coating thickness laser measuring device, and aims to solve the problems that an existing fireproof coating thickness laser measuring device is single in use function and can only be used for detecting the thickness of fireproof coatings on the upper face and the lower face of a steel structure building. According to the technical scheme, the thickness detection device comprises a tool bottom plate, two tool supporting plates are arranged above the tool bottom plate, rotating shafts are arranged on the opposite sides of the two tool supporting plates, the outer portions of the two rotating shafts located on the same side are connected with the same conveying belt, and the conveying belt is connected with the tool bottom plate. And the same building steel structure body is arranged above the two conveying belts. The steel structure building fireproof coating thickness laser measuring device disclosed by the invention has the effects that the thickness of a special-shaped building steel structure fireproof coating can be conveniently detected, and the applicability of the detection device is improved.

The invention relates to a method for determining the thickness (S) of a material strip (5) when the material strip (5) is fed to the machining zone of a machine tool (1). In the process, the material strip (5) is tensioned between two rotatable rollers (3, 4), the relative position of which to one another (reference relative position) at a certain rotational angle position to one another (reference rotational angle constellation) was ascertained in the original state with clean rollers and the roller spacing "zero". When the material strip (5) is tensioned between the rollers (3, 4), if a rotational angle constellation of the two rollers (3, 4) to one another corresponds to the reference rotational angle constellation, the relative position of the first roller (3) to the second roller (4) is ascertained (strip thickness relative position) and subsequently the strip thickness (S) of the material strip (5) is determined from a comparison of the strip thickness relative position with the reference relative position. The method according to the invention makes it possible for the influence of concentricity errors of the two rollers (3, 4) on the measuring precision to be eliminated.

The utility model discloses a crankshaft end face runout detection device. The device comprises a pedestal; the positioning assembly is arranged on the base and used for placing the crankshaft; the driving assembly is used for driving the crankshaft, and the positioning assembly can move in the height direction of the base so that a connecting rod neck of the crankshaft and an output shaft of the driving assembly can be coaxial. The detection assembly detects end face run-out values of the connecting rod neck and the main journal; at least one of the detection assembly and the positioning assembly can move in the length direction of the base so as to change the axial position of the detection assembly relative to the crankshaft. At least one of the detection assembly and the positioning assembly can move in the width direction of the base so as to change the radial position of the detection assembly relative to the connecting rod neck end face or the main journal end face of the crankshaft. Axis adjustment and alignment during detection of runout of the end face of the connecting rod neck are achieved through movement of the positioning assembly, total runout value detection of the end face of the main journal and the end face of the connecting rod neck is achieved through movement of the detection assembly and the positioning assembly, and the effect that the runout of the end faces of the main journal and the connecting rod neck can be detected through the same detection device is achieved.

A coordinate measuring machine (CMM) for determining spatial coordinate data of an object point on a workpiece. The CMM comprising, a first limb, a probing element, a second limb, and a coupling interface. The probing element provides probing data regarding an interaction between a sensing area and the object point. The first limb connects the sensing area to a first proximal end. The coupling interface is configured to provide coupling data regarding an interaction between a coupling area and a reference point having a defined spatial relationship to the object point. The second limb connects the sensing area to a second proximal end mechanically constrained to the first proximal end.

The invention provides a door and window frame dynamic offset testing device, and relates to the technical field of door and window frame production. The device comprises a transmission assembly, and the transmission assembly is used for horizontally conveying a to-be-tested door and window frame; the data processing device is arranged on the transmission assembly, and the data processing device is used for collecting offset data and performing centralized processing to form a dynamic offset broken line graph; the adjusting assembly is arranged on the transmission assembly, the adjusting assembly comprises an adjusting part and an extending frame, the adjusting part is used for providing displacement perpendicular to the movement direction of the door and window frame, the extending frame is fixedly installed on the adjusting part, and a horizontal laser range finder and a spacing laser range finder are installed on the extending frame; and a measuring assembly. By means of the measuring assembly and the data processing device, the offset of the door and window frame in the vertical direction and the horizontal direction can be measured, and whether the door and window frame is qualified or not can be judged.

Systems, methods, and storage media for robot-assisted laser osteotomy are disclosed. Exemplary implementations may: receive osteotomy data obtained in connection with robot-assisted laser osteotomy; analyse the osteotomy data to determine one or more attributes associated with osteotomy; and determine, based on the one or more attributes, one or more functions associated with osteotomy.

The invention discloses a building interior wall flatness detection device and method, and belongs to the field of wall flatness detection. A building interior wall flatness detection device comprises a moving seat, the bottom of the moving seat is fixedly connected with multiple groups of moving wheels, the top of the moving seat is fixedly connected with a lifting frame, the building interior wall flatness detection device further comprises a lifting plate, and the lifting plate is slidably connected between the inner walls of the two sides of the lifting frame; according to the invention, through rotation of the vertical screw rod and the horizontal screw rod, the optical range finder detects the whole wall surface, so that the detection efficiency and accuracy are effectively improved; floating ash impurities attached to the wall surface are swept away by using a cleaning brush, so that the influence of dust impurities and the like on a detection result is reduced, and the detection accuracy is further improved; and in the moving process of the translation sleeve, the outer magnetic plate and the inner magnetic plate are utilized to generate a flow guide effect in the piston box, so that the floating ash scraped and swept by the cleaning brush moves directionally, interception and collection of the floating ash are realized, and the environmental quality in a detection area is effectively improved.

One embodiment can provide a computer-vision system. The computer-vision system can include one or more cameras to capture images of a scene and one or more sets of single-color light sources to illuminate the scene, with a respective set of light sources comprising multiple single-color light sources of different colors. The multiple single-color light sources within a given set can be turned on sequentially, one at a time. The cameras can capture an image of the scene each time the scene is illuminated by a respective single-color light source of a particular color.

A manufacturing system includes: a coordinate positioning machine having a structure moveable within a working volume of the machine, a drive arrangement for moving the structure around the working volume, and a positioning arrangement for determining the position of the structure within the working volume with a first accuracy; and a metrology arrangement to which the machine is removably couplable, such that when the machine is coupled to the metrology arrangement, with the structure being moved by the drive arrangement, the metrology arrangement is able to measure the position of the structure with a second accuracy that is higher than the first accuracy.

The invention relates to the technical field of bearing detection, and discloses a shield tunneling machine bearing performance testing device which comprises a supporting table, a motor is fixedly connected to the bottom of the supporting table, a placing ring is fixedly connected to the top of the supporting table, and a fixing plate is fixedly connected to the top of the supporting table. A hydraulic cylinder is started to stretch out to drive a pushing ring to descend to make contact with a spring ring, the spring ring descends, a first connecting rod rotates, a clamping block is pushed to move towards the inner wall of a bearing inner ring, the spring ring descends to drive a sliding rod to descend, a sliding ring descends to extrude gas in a fixing barrel, and the clamping block drives a gas conveying pipe to move; when the three clamping blocks make contact with the inner wall of the bearing inner ring preliminarily at the same time, the gas conveying pipe can be separated from the blocking piston, high-pressure gas can enter the gas conveying pipe, the spring pressing plate is pushed to descend, the top of the bearing inner ring is extruded, the bearing inner ring can be further restrained by pressing the clamped position of the bearing inner ring, and the bearing inner ring is prevented from being damaged. And the clamping device is effectively prevented from deviating in the clamping process.

The invention discloses a circuit board dispensing quality detection device, and relates to the technical field of circuit board processing detection, the circuit board dispensing quality detection device comprises a base, a conveying positioning mechanism, an upper shooting detection unit and a lower shooting detection unit, the conveying positioning mechanism is installed on the base and is used for conveying and positioning a carrier carrying a circuit board; the upper shooting detection unit and the lower shooting detection unit are respectively located above and below the conveying positioning mechanism, are used for acquiring dispensing images on the front and back surfaces of the circuit board and respectively comprise a shooting module, the shooting module comprises two symmetrically arranged three-dimensional line scanning cameras, and shooting light paths of the two symmetrically arranged three-dimensional line scanning cameras are inclined and are crossed and opposite; the shooting light path of the central camera is vertical; the plurality of circumferential cameras are circumferentially distributed around the central camera, a shooting light path is inclined, and the inclination angle is adjustable; and the light source assembly is used for supplementing light when the three-dimensional line scanning camera, the central camera and / or the circumferential cameras collect images. The scheme is used for automatically detecting the glue coverage quality of the circuit board after glue dispensing.

The invention relates to the field of crankshaft detection, in particular to an adjustable support for crankshaft detection and a detection device.The adjustable support comprises an installation guide rail, a supporting mechanism is installed on the installation guide rail through positioning bolts, and the supporting mechanism is used for installing and fixing a crankshaft to be detected so that the crankshaft to be detected can be in a horizontally rotatable state; wherein the detection device further comprises a controller, an alarm, a positioning part and a detection part on the basis of the adjustable support, the positioning part is used for emitting positioning laser, and the detection part is used for detecting a main shaft and a connecting rod shaft of the crankshaft to be detected and feeding back a detection result to the controller. According to the invention, through flexible adjustment of the adjustable support, detection requirements of crankshafts of different specifications and sizes are met, and the problem of adaptability of crankshaft detection is solved; through the detection device capable of being flexibly adjusted, detection of the crankshaft is conveniently and rapidly completed, and the problem of low efficiency of a traditional detection mode is solved.

A method is provided for calculating an optimal putting line and stroke. The method includes receiving user input data at a processor, including at least a putt distance calibration, a green friction calibration and a targeted distance past the cup calibration; calculating a magnitude of break calibration, including an averaged pitch and roll calculation of the putting green; calculating a velocity calibration, including an averaged optimal initial velocity calculation of a putt, and combining the user input data, the magnitude of break calibration and the velocity calibration to create green reading data. The method also includes using the green reading data to create a user output display that includes an optimal putting line and stroke, where the optimal putting stroke includes a numerical deviation of a backswing of a golfer based at least in part on the golfer's normal backswing and the green reading data.

The utility model discloses a screw conveyor screw shaft blade wear detection device, and solves the problems of high difficulty and low precision of screw shaft blade wear detection in the prior art. The utility model relates to a screw conveyor screw shaft blade wear detection device, which comprises a fixed seat arranged on a screw conveyor cylinder in a sealing manner, a telescopic driving piece with a stroke sensor is arranged on the fixed seat, and one end of the telescopic driving piece extending into the screw conveyor cylinder is connected with a detection plate corresponding to a screw blade. The detection plate is provided with an abrasion detection piece for measuring the abrasion loss of the detection plate; according to the device, the oil cylinder, the displacement sensor and the like are adopted, and the function of rapidly measuring the abrasion loss of the spiral shaft can be achieved through the displacement generated when the oil cylinder pushes the lower detection plate in a closed environment. The wear detection device provided by the utility model solves the problems of difficulty in wear detection, high detection cost, untimely detection, low detection precision and the like of the screw shaft of the screw conveyer on site, and realizes the purposes of convenience, rapidness and high accuracy in wear detection of the screw shaft.

The invention relates to the technical field of measuring devices, and particularly discloses a double-layer composite air pipe sealing size laser high-precision detection device which comprises a base and an air pipe, sealing plates are fixedly connected to the positions, close to a port, of the outer surface of the air pipe, a bolt is arranged between the two sealing plates, and a guide seat is movably connected to the upper side of the base. A positioning assembly is arranged on the upper side of the guide base and comprises a sleeve fixedly connected with the outer surface of the upper end of the guide base. By arranging the positioning assembly, the air pipes can be lifted and supported on the two sides of the connecting position of the air pipes through the symmetrically-distributed jacking blocks, the probability that the air pipes deform downwards in the placing process can be effectively reduced, therefore, the two sets of air pipes are kept in a straight line shape, and then the risk that a gap between the sealing plates changes can be reduced; the detection error of the sealing performance of the air pipe joint caused by the external force can be reduced, and the detection precision can be effectively improved.

The invention relates to the technical field of space deformation displacement monitoring of building structures and the like, in particular to a follow-up type three-dimensional moving deformation monitoring device and a follow-up type three-dimensional moving deformation monitoring method. A rotary connecting assembly of the follow-up three-dimensional moving deformation monitoring device is connected with a first connecting seat, a telescopic assembly is connected with a second connecting seat, and the telescopic assembly is connected with the second connecting seat through the rotary connecting assembly; the monitoring assembly is used for monitoring the telescopic amount of the telescopic assembly and the rotating angle of the telescopic assembly relative to the rotating connecting assembly. The first connecting base is used for being connected with one end, generating relative displacement or one deformed end, of a to-be-monitored structure, and the second connecting base is used for being connected with the other end, generating relative displacement or the other deformed end, of the to-be-monitored structure. The device can move along with a relative displacement or deformation part of a to-be-monitored structure, so that the three-dimensional deformation condition of the to-be-monitored structure can be accurately monitored in real time, and the application is not limited to the two fields by taking vibration isolation support and interlayer displacement angle monitoring as an example for explanation.

The invention provides a relay contact pressure debugging method and device, equipment and a storage medium. A moving contact of the relay is arranged on the leaf spring, one end of the leaf spring is connected with the first part, and the moving contact is far away from or close to the static contact by rotating the first part. Before debugging, a first distance between a moving contact and a static contact is determined on the basis of a target debugging pressure under the condition that the target debugging pressure is applied to the moving contact on the leaf spring in the direction away from the static contact, and a first angle is determined on the basis of the first distance; the first angle can indicate a first angle that the first part needs to rotate under the condition that the leaf spring does not elastically deform and the moving contact of the leaf spring horizontally moves by a first distance. Therefore, after the first angle is calculated in advance, the moving contact can be close to the static contact and the pressure applied to the static contact by the moving contact is the target debugging pressure only by controlling the first part to rotate by the first angle along the specific direction, so that the debugging process is saved, and the production efficiency is improved.

The invention discloses a bending angle laser measuring device for a bending piece, and relates to the technical field of laser measurement, the bending angle laser measuring device comprises a detection table, a driving mechanism, a movable rod, a receiver, a laser head, a control panel and a bending pipe, the top of the detection table is provided with a first sliding groove in a penetrating manner, and the inner wall of the first sliding groove is in fit sliding connection with a mounting seat. When laser measurement is carried out on a bent part, a spiral groove is matched with a fixing bead, a rotary handle is rotated to drive an adjusting disc to move, four fixing strips protrude out of a telescopic groove through a connecting rod and a diffusion groove, a pipe is fixed from the interior, and continuous scanning and precision of laser are guaranteed; lifting, rotating, overturning and surface changing of the pipe are achieved, double-face data collection is completed through single-time clamping, and efficiency and data reliability are improved.

The utility model provides a multifunctional measuring device, and relates to the technical field of measuring devices. A through groove is formed in the upper end of the main base, a gear is installed in the through groove in the upper end of the main base through a pin shaft, a worm gear is fixed to a center shaft of the gear, and a worm is installed at the upper end of the main base through a bearing. A wood board is measured through the scale plate on the main seat, when the length of the scale plate on the main seat is insufficient, the knob is rotated to enable the worm to rotate, the worm drives the gear to rotate, the inner rod extends out of the front side, the length of the wood board can be measured through the inner rod and the scale plate on the main seat, and the length is the sum of the reading of the inner rod and the scale of the main seat. The worm gear and the worm can prevent the inner rod from moving automatically, and reading is facilitated; the clamping buckle wheel is pulled downwards to be separated from the ratchet wheel, the ink line on the take-up barrel can be pulled out, the lower pressing plate can press the ink line downwards into an ink groove in the ink box, the measured wood board can be marked through the ink line, and cutting is convenient.

The invention discloses a conveying device for detecting the protruding height of an oil injector, and relates to the technical field of oil injector detection. Wherein the conveying piece comprises a rolling shaft and an anti-skid sleeve which are connected in a sleeved mode, the roughness of the surfaces of the rolling shaft and the anti-skid sleeve is different, and the rolling shaft is driven by a motor to rotate. According to the conveying device for detecting the protruding height of the oil sprayer, the rolling shaft and the anti-skid sleeve which are connected in a sleeving mode are adopted, the roughness of the surface of the anti-skid sleeve is increased, and therefore the roughness of the device is changed according to needs, and the problem that when an existing conveying device for detecting the oil sprayer is used, the height of the oil sprayer is too large is effectively solved. The technical problem that the roughness of the conveying belt cannot be freely adjusted according to needs is solved, the purpose of freely adjusting the surface roughness of the conveying device is achieved, the surface roughness of the conveying device can be adjusted according to the machining condition of the air cylinder cover, various machining requirements are met, and the applicability of the device is improved.

The invention discloses a measuring method, a measuring device and a measuring system for a pole piece. The measuring device acquires a first image of a to-be-measured pole piece acquired by an image acquisition assembly; identifying a measurement object of the to-be-measured pole piece in the first image to obtain a measurement object identification result; wherein the measurement object recognition result comprises at least two feature points on the measurement object; identifying a scale on a passing roller in the first image to obtain a scale identification result; wherein the scaleplate is arranged along the peripheral surface of the passing roller in a surrounding manner in the circumferential direction; the scaleplate identification result comprises at least one of scale marks, flag bits and positions of the scaleplate; the flag bit is used for indicating a preset position of the scale surrounding the peripheral surface of the passing roller; the position is the side edge position of the scale in the axial direction of the passing roller; and determining a size measurement result of the measurement object based on the measurement object recognition result and the scale recognition result. Based on the scheme, the accuracy and efficiency of pole piece measurement can be effectively improved.