38 results about "Vernier scale" patented technology

The invention discloses a wafer back alignment method, which comprises the following steps of: converting micron-sized offset between a first alignment mark and a second alignment mark into visual scale alignment judgment by taking one of a first scale and a second scale as a main scale and the other one as a vernier scale, so that the reading precision of + / -0.1 mu m can be realized under a microscope image; compared with + / -0.5 [mu] m in the prior art, the temperature is increased by 5 times; in the chip back alignment method, an ultraviolet lithography machine (MA6 / MA8) is adopted to etch alignment marks and scales, and then an electron beam exposure machine (EBL) is adopted to etch a final optical structure, so that the optimal balance of efficiency and cost is realized while the submicron alignment precision is ensured.

The invention discloses a method and a system for measuring the layer thickness of a multilayer hollow pipe fitting based on image recognition, and relates to the technical field of multilayer hollow pipe fitting detection, and the technical key points are as follows: firstly, enhancing boundary features through multi-band image fusion preprocessing, and offsetting dimensional deviation by combining dynamic environment compensation and residual stress correction; through multi-dimensional verification and error correction, the measurement precision reaches a preset high-precision standard and is obviously superior to that of traditional vernier caliper measurement and ultrasonic measurement; secondly, a stable chromatic aberration boundary is constructed through a color master adaptation rule, and the influence of material pores, defects and distribution uniformity is avoided; meanwhile, through the technologies of self-adaptive noise reduction, dynamic measurement density adjustment and the like, the influence of factors such as ambient light interference and boundary complexity is resisted, and the measurement reliability is ensured; in addition, the color masterbatch adaptation rule can be dynamically adjusted according to optical characteristics and forming process parameters of different materials, the method is suitable for various complex multilayer hollow pipe fittings, and a measurement scheme does not need to be redesigned for specific pipe fittings.

The utility model relates to road construction is used measuring instrument technical field discloses a kind of high delay elastic ultra-thin wearing course thickness measuring device, including empty cylinder, inner plug rod, limit disc and vernier caliper;The inner plug rod is straight rod structure with conical head formed at bottom, and movably set in the inside of empty cylinder, after the bottom of empty cylinder is closed, the bottom end surface is reserved with the inner plug rod just passing through the perforation, the limit disc of the inside of the inside of empty cylinder is formed with the movable sleeve in the lower part of inner plug rod, and the vernier caliper is formed with the upper part of middle part.Compared with prior art, the advantages are that: after guaranteeing the bottom disc of empty cylinder is placed on the high delay elastic ultra-thin wearing course laid, the inner plug rod is pressed to let its bottom insert into high delay elastic ultra-thin wearing course, until the inner plug rod just passes through high delay elastic ultra-thin wearing course, then the scale reading on empty cylinder and vernier scale reading on vernier caliper are combined, the laying thickness of high delay elastic ultra-thin wearing course can be accurately measured, and measurement operation is more convenient and efficient.

The utility model discloses a combined type gap measuring scale which comprises a first plate body and a second plate body which are respectively formed by three edges connected end to end, any acute angle edge of the first plate body is provided with scale marks, the scale marks are composed of a plurality of length scale lines, and the length scale lines are arranged on the first plate body. The numerical value represented by each length scale line is the distance from the point of the length scale line on the acute angle side to the other acute angle side, the second plate body is a right triangle, and at least one edge of the second plate body is provided with an indexing mark. According to the utility model, the first plate body and the second plate body are matched for use, so that other obstacles around cannot interfere with the caliper during measurement; the right angle can be used to determine whether to be perpendicular to the measured object. According to the utility model, the integrated characteristic of a vernier caliper is abandoned, mechanical structures such as a combined bayonet are not provided, the overall structure is simple, the manufacturing cost is low, and the measurement precision is improved.

The utility model relates to a vernier straight rod ruler measuring device for a wide-range inner hole, and belongs to the technical field of object dimension measurement. According to the technical scheme, one end of a ruler frame (1) is provided with a ruler frame cover plate (2) and a vernier scale (8), and the other end is provided with a second measuring head (9); one end of the main ruler body (5) is provided with a measuring head I (6), and the other end of the main ruler body (5) is slidably arranged in a space formed by the ruler frame (1), the ruler frame cover plate (2) and the vernier (8); a spring shaping rod (10) is arranged in the ruler frame (1), and a spring (11) is sleeved on the spring shaping rod (10); the main ruler body (5) is provided with a cavity (21), the spring shaping rod (10) and the spring (11) are both arranged in the cavity of the main ruler body (5), and the spring (11) moves through stretching and retracting of the main ruler body (5). The beneficial effects of the utility model are that the device is high in measurement precision, is wide in measurement range, can rapidly deal with the switching of measurement of different sizes, and improves the measurement work efficiency.

The utility model discloses a measuring device. The measuring device comprises an adapter and a measuring rod. The measuring base of the depth vernier caliper is in contact with the second end of the adapter, the first end of the adapter is in contact with the reference surface of the to-be-measured workpiece, the caliper body measuring end of the depth vernier caliper is in contact with one end of the measuring rod, and the other end of the measuring rod is in contact with the measured surface of the to-be-measured workpiece. Meanwhile, the positioning cylinder and the workpiece to be detected are positioned and fixed. The length of the measuring rod is equal to the distance from the first end to the second end of the adapter, so that the moving distance of the caliper body of the depth vernier caliper relative to the measuring base is equal to the moving distance of the measuring rod relative to the adapter. The auxiliary device for measuring the depth solves the problem that the depth vernier caliper cannot directly measure the depth size due to the special structure of the workpiece to be measured, avoids the situation that the depth size can be obtained only through multiple times of measurement and calculation in the related technology, and has the characteristics of few measurement steps, few measurement data, no need of calculation and high measurement precision.

This utility model relates to a boring template device for measuring the thread of oil casing pipes. The technical solution includes a main scale and a vernier scale. The main scale has upper and lower measuring jaws on its upper and lower ends, respectively. The upper edge of the main scale body has a lower inner diameter limit scale and an upper inner diameter limit scale. A vernier scale is fitted onto the main scale body. The left end of the vernier scale body has upper and lower measuring jaws, and the left end faces of the upper and lower measuring jaws are not on the same vertical line. The horizontal difference between the two is the boring limit difference. The beneficial effect is that by moving the position of the vernier scale body, it is possible to quickly determine in batches whether the bore opening of the corresponding product is too small or too large. Since the left end faces are not on the same vertical line, the difference is fixed, making it suitable for measuring the inner diameter of bores of various products with consistent boring tolerances, significantly improving measurement efficiency.

The application discloses a vernier caliper reading recognition method for intelligent supervision and related equipment, and the method comprises the following steps: acquiring the image of the vernier caliper reading by using a camera, the camera is adjusted according to a preset rule in advance, and the vernier scale of the vernier caliper is equally divided according to a preset specification; determining whether the vernier caliper in the image is a digital caliper or a scale caliper by using a trained target detection model; if the vernier caliper is determined as a digital caliper, performing character recognition on the image to obtain the target reading of the vernier caliper; if the vernier caliper is determined as a scale caliper, acquiring the main scale reading and the vernier scale reading of the vernier caliper based on the image, and determining the target reading of the vernier caliper based on the main scale reading and the vernier scale reading. The application can automatically read the reading of the vernier caliper, and the reading can be displayed in smart glasses, thereby improving the electronic degree of the supervision of the power equipment.

The utility model relates to a Young modulus experimental instrument for a metal wire, which comprises a base, a bracket, a steel wire rope upper chuck, a steel wire rope lower chuck, a tension part, a tension sensor, a displacement connecting part, an optical lever placing platform, a three-foot tip seat, a laser emitting part, a vernier caliper support frame and a vernier caliper, the laser emitting part is installed on the three-foot tip seat, the measuring block on the displacement connecting part penetrates through the optical lever placing platform and is connected with the optical lever placing platform in a sliding mode, and a laser beam of the laser emitting part can vertically and downwards directly irradiate a vernier of the vernier caliper. According to the Young modulus experiment instrument for the metal wire, the displacement variation of a laser projection point of the laser emitting part is read through the vernier caliper, the measurement precision is high when the Young modulus experiment instrument is used, a telescope and a reflecting mirror are not used, only the three-foot tip seat and the vernier caliper need to be adjusted, the workload of adjustment preparation before an experiment is reduced, and the experiment efficiency is improved.

The utility model discloses a mechanical large-diameter thread outer diameter measuring device, which comprises a bottom plate, and two positioning sliding rods and two measuring sliding rods which are arranged on the bottom plate, and the two positioning sliding rods can move relatively along the upper surface of the bottom plate, so that the two positioning sliding rods are close to each other to radially clamp a boss of a workpiece to be measured. The two measuring sliding rods can move relatively along the upper surface of the bottom plate, so that the two measuring sliding rods are close to each other and respectively cling to two sides of a thread of a to-be-measured workpiece, scale marking lines are arranged on the upper surface of the bottom plate, and the lower ends of the measuring sliding rods are aligned with the scale marking lines. The length limit of an outer measuring claw of a vernier caliper is broken through, the large-diameter thread diameter measuring device is suitable for measuring the outer diameter of a large-diameter thread, the measurable thread diameter range is wide, the large-diameter thread diameter measuring device is particularly suitable for batch detection of a production line, personal errors are reduced through a positioning sliding rod and scale marks, the measuring precision and stability are improved, only three steps of fixing, pulling and reading are needed during operation, the single-time measuring time is short, and the efficiency is improved. The operation process is simplified, and stable fixation, automatic adaptation and rapid reading are achieved.

Disclosed is an electronic scale ruler, having a scale ruler main body, a main control board, an input, a display screen, a light source, a vernier base, and a distance conversion assembly. The scale ruler main body has an outer edge side. The light source is mounted on the outer edge side of the scale ruler main body, having a plurality of light beads and being capable of displaying scale. The vernier base is removably mounted on the outer edge side of the scale ruler main body, being capable of moving along a length direction of the outer edge side of the scale ruler main body. The distance conversion assembly is configured to calculate a movement of the vernier base from an origin on the outer edge side of the scale ruler main body.

The present application discloses a float caliper for measuring the M value of a spline, which comprises a main scale, a vernier scale matched with the main scale, a fixed jaw on the main scale, a movable jaw on the float scale matched with the fixed jaw, and a ball measuring rod matched with the spline and detachably mounted on the fixed jaw and the movable jaw. The float caliper further comprises an M value standard block with a standard M value of the spline to be measured. The main scale comprises a main body and a movable adjustable main scale mounted in the main body. The fixed jaw is integrally formed with the main body. The vernier scale is movable on the main body and matched with the adjustable main scale for measurement. The M value standard block is radially positioned by the ball measuring rod. The present application has higher precision and reliability, larger adjustable stroke, similar measurement operation to the common float caliper, lower requirement for the operator, higher universality and practicality, and improved measurement reliability of the M value of the taper spline. The present application further provides a method for measuring the M value of the spline.

This invention relates to an apparatus and method for elevation measurement in confined spaces during the installation of precast columns. A PTFE (polytetrafluoroethylene) plate component is placed on the top surface of the lower column section to adjust the elevation and flatness of the reference surface. A vernier caliper is used to check the thickness of the PTFE plate component and measure the required height of the shim. A reflective marker is attached to the upper column section to mark the elevation measurement target. A tripod is used to mount a measuring robot. The measuring robot is placed on a stable location outside the foundation pit to measure the column elevation. This invention solves the problem of elevation measurement when space is limited during the installation of the upper section of a precast column, making leveling impossible. By innovating traditional leveling methods and adding a new device, it completes the elevation measurement task in confined spaces during the installation of precast columns, offering advantages such as high operability, high measurement accuracy, fast and efficient operation, effective protection of worker safety, and improved construction progress.

The utility model discloses a combined vernier angle measuring structure which comprises a first structural body and a second structural body. The first structural body comprises at least three edges which are connected end to end, the second structural body comprises at least two edges which are connected end to end, the first structural body is provided with a first arc edge, the second structural body is provided with a second arc edge, the first arc edge and the second arc edge have the same radian, one of the first arc edge and the second arc edge is a convex arc, and the other one is a concave arc. The first structural body at least has a concave angle formed by a first arc edge and an adjacent edge thereof; the surface of the first arc edge is provided with angle scale marks or angle vernier scale marks, and the surface of the second arc edge is provided with angle vernier scale marks or angle scale marks used in cooperation with the first arc edge. The protractor has the advantages that the principle of an angle vernier caliper is adopted, the first structural body and the second structural body are used in cooperation, and compared with an existing protractor, the protractor can effectively improve the angle measurement precision.

The utility model provides an on-line external diameter measuring device. The on-line outer diameter measuring device comprises an operation table, an installation rail is installed on the top of the operation table, and a limiting block is installed on the side face of the installation rail. According to the utility model, the two groups of first measuring brackets are arranged on the mounting rail, the second measuring bracket is arranged at the left side of the group of first measuring brackets at the right side, and the second measuring bracket is arranged at the top of the guide rail at the top of the mounting rail and can move along the guide rail; during measurement, a to-be-measured workpiece only needs to be placed between the first measurement support and the second measurement support which are arranged on the right side, and at the moment, the measurement pen and the first measurement support which is arranged on the left side move relatively, so that the to-be-measured workpiece is driven to move along the through hole formed in the first measurement support and the second measurement support which are arranged on the right side. Compared with a measurement mode of a manual vernier caliper, the external diameter measuring pen is very convenient to use.

The present application relates to the field of precision visual measurement and alignment technology, and particularly relates to an electronic vernier caliper alignment method based on a pixel of a surface array detector, comprising the following steps: S1, designing a mark plate according to the optical field of view and the pixel size of the surface array detector; S2, collecting an image and positioning a coarse alignment mark through a geometric alignment method to obtain a reference grid position; S3, performing a gray scale processing on a grid area to generate a gray scale distribution; S4, performing a definition analysis based on the gray scale distribution to determine a target grid position; S5, comparing the position difference between the target grid and the reference grid to calculate row and column offsets; and S6, performing a statistics on a plurality of offset results to obtain an overall offset amount. The present application constructs a vernier caliper alignment mechanism based on the period difference between the pixel of the surface array detector and the mark grid, and realizes a fast alignment effect with high precision, low computing power, low cost and strong adaptability without the need of complex calculation and a multi-point structure.

This invention belongs to the field of mechanical assembly, specifically relating to a visual sealing component compression ratio measurement device and method. The device includes fastening bolts, an upper assembly flange, a sealing component, a lower assembly flange, fastening nuts, and a standard color matching tape. The upper and lower assembly flanges are connected and fixed by fastening bolts and nuts. The sealing component is installed on the platform of the lower assembly flange. The fastening bolts and nuts are adjusted to compress the sealing component. After tightening, the color of the sealing component is observed and compared with the standard color matching tape to confirm the compression ratio of the sealing component. This invention simplifies the flange tightening process, avoids the use of measuring instruments such as vernier calipers, depth gauges, and feeler gauges, and has lower personnel qualification requirements, effectively improving the efficiency and quality of flange tightening work.

The utility model discloses a novel caliper for machining measurement, which comprises a main scale, a side baffle plate, a first measuring claw, a vernier scale and a second measuring claw, the outer side of the main scale is fixedly connected with the side baffle plate, the bottom of the main scale is fixedly connected with the first measuring claw, and the outer side of the main scale is slidably connected with the vernier scale. According to the novel caliper for machining measurement, when a mechanical part needs to be measured, a first measuring claw and a second measuring claw are placed on the two sides of the workpiece firstly, then a side baffle is held, the palm pushes a push plate forwards, the push plate compresses a first telescopic spring to move towards the side baffle, and a traction rope is synchronously driven; the traction rope is guided through the guide wheel set to generate traction force on the vernier scale, so that the vernier scale slides along the outer side of the main scale, the first measuring claw and the second measuring claw abut against the two sides of a workpiece, and the workpiece is measured. And a large batch of workpieces can be rapidly measured.

The utility model discloses a cross chord micrometer caliper, relates to a high-precision measuring tool, in particular to a novel measuring device combining a vernier caliper, a micrometer and a cross chord positioning rod, and is particularly suitable for high-precision inner diameter measurement of a large-size workpiece. The vernier caliper comprises a caliper body, a vernier scale, a vernier scale adjusting section and a micrometer adjusting rod, the vernier scale is sleeved on the caliper body, the right side of the vernier scale is connected with the vernier scale adjusting section, the micrometer adjusting rod is fixedly arranged on the right side of the lower portion of the vernier scale adjusting section, and a micrometric screw of the micrometer adjusting rod abuts against the vernier scale. The fixed rod of the micrometer adjusting rod is embedded in the lower portion of the vernier scale adjusting section and penetrates through the lower portion of the vernier scale adjusting section. Wherein a positioning nail of the retainer is responsible for locking, so that each lattice is ensured to display an integer on the caliper, and a decimal is read by the micrometer. The three-jaw micrometer combines the functions of a vernier caliper and a micrometer, introduces the design of a cross-shaped positioning rod, has the functions of a common caliper and a micrometer, is also suitable for the measurement of the inner diameter of a larger diameter, is especially suitable for the precise measurement of the inner diameter of an oversize, and solves a problem that a conventional three-jaw micrometer cannot measure an overlarge inner diameter.

The invention discloses a fireproof coating thickness detection system and method based on an unmanned aerial vehicle platform. The system comprises the unmanned aerial vehicle platform, a thickness measurement module, a positioning and attitude compensation module and a data processing and wireless transmission module. The system cooperates with unmanned aerial vehicle flight control through a positioning and attitude compensation module, ensures that a measuring head of a measuring module is perpendicular to the surface of a measured fireproof coating for contact thickness measurement, and transmits data to a ground terminal in real time; according to the invention, a mechanical contact type thickness measuring mode based on combination of a capacitive grating sensing technology and a vernier caliper mechanical structure is adopted, and the hard alloy measuring head is in direct contact with the surface of the coating for measurement; therefore, measurement errors caused by changes of color, roughness, glossiness and environment illumination of a detected surface in a traditional non-contact optical or ultrasonic method are avoided, and the precision and stability of thickness detection of an ultra-thin, multi-layer or non-uniform fireproof coating on a complex building facade, especially on an ultra-thin, multi-layer or non-uniform fireproof coating, are greatly improved.

The utility model belongs to the technical field of machining, and particularly relates to a marking tool which comprises a vernier caliper, the vernier caliper comprises a main scale, a fixed measuring claw and a vernier scale, and the vernier scale is in threaded connection with a fastening screw. A marking pin perpendicular to the side wall of the main caliper is fixedly arranged on the fixed measuring claw, and the marking end of the marking pin protrudes out of the outer wall of the vernier caliper; an auxiliary reference piece is fixedly arranged on the vernier scale and protrudes out of the scribing end of the scriber in the axial direction of the scriber; the side wall of one side, close to the fixed measuring claw, of the auxiliary reference piece is a lineation reference surface which is of a plane structure and is perpendicular to the axis of the main ruler in the length direction; and when the reading of the vernier caliper returns to zero, the center line of the scriber is coplanar with the scribing reference surface on the auxiliary reference piece. According to the utility model, the waste vernier caliper is recycled, which is green and environment-friendly; by using the marking tool, the marking operation of a long straight line can be completed at one time, the marking operation efficiency is improved, and the straightness of the marked straight line and the position precision of the marked straight line relative to a plate datum plane are improved.

The invention discloses a Marshall test piece outer groove measuring device and a measuring method, the Marshall test piece outer groove measuring device comprises a main scale, a vernier scale, outer measuring claws and fixing screws, the vernier scale is slidably sleeved on the main scale and is limited through the fixing screws on the vernier scale, the two outer measuring claws are arranged on the same side of the main scale and the vernier scale, the main scale is provided with scales, and the two outer measuring claws are arranged on the same side of the vernier scale. Each outer measuring claw is of an L-shaped structure, one end of each outer measuring claw is connected with the main scale and the vernier scale, the other ends of the outer measuring claws are opposite, and when the other ends of the outer measuring claws make contact with each other, the scale on the main scale is displayed to be zero; when the distance between the two recesses is measured, the two outer measuring claws respectively extend into the two recesses and are in contact with the bottoms of the recesses, at the moment, the distance between the two recesses is directly read through the scales, the operation is convenient, and repeated calculation is not needed; the main scale, the vernier scale and the outer measuring claw are of an integrated structure and do not need to be connected again, so that the measuring precision is ensured; and the electronic display can directly display readings, so that personnel can conveniently obtain the detected size.

The utility model provides a road asphalt paving thickness detection instrument, and belongs to the field of paving thickness detection. The problems that a traditional road asphalt paving thickness detection technology is time-consuming, labor-consuming and inaccurate in detected reading are solved. The road asphalt paving thickness detection instrument comprises a main scale and a vernier scale, the main scale is provided with main scale scales, the main scale scales are arranged along the extension direction of the main scale, the vernier scale is slidably sleeved on the main scale, the vernier scale is provided with vernier scales, and the vernier scales are arranged along the extension direction of the vernier scale. And the starting point direction of the vernier scale is the same as that of the main ruler scale. The road asphalt paving thickness detection instrument can conveniently, quickly and accurately detect the road asphalt paving thickness, and manual repeated measurement and adjustment are avoided, so that the construction progress is accelerated, and the paving thickness and the construction quality of paved road asphalt are ensured.

This invention provides a method and apparatus for scanning equipment vibration frequencies based on the vernier caliper principle. The method includes: acquiring the equipment's rotational speed range, vibration spectrum, and transmission coefficients between components; determining the vernier scanning range for scanning the vibration spectrum based on the rotational speed range; determining the first characteristic frequency corresponding to each component at each position within the vernier scanning range based on the vernier scanning range, vibration spectrum, and transmission coefficients; calculating the total energy value of the energy narrowband at each position based on the first characteristic frequencies of each component within the vernier scanning range; and determining the second characteristic frequency of each component in the equipment based on the total energy value of the energy narrowband at each position, where the second characteristic frequency is the target characteristic frequency of the component. This invention allows for accurate acquisition of equipment vibration characteristic frequencies, improving the reliability of fault diagnosis and analysis.

The utility model discloses a combined vernier length measuring structure which comprises a plate-shaped first structural body and a plate-shaped second structural body, wherein the edges of the first structural body and the second structural body are attached. The first structural body comprises at least four straight edges which are connected end to end, the first structural body is provided with at least one concave angle, and a length scale mark is arranged on one straight edge in the horizontal direction of the concave angle; the second structural body comprises at least three straight edges which are connected end to end, the second structural body is provided with at least one convex corner, vernier scale marks are arranged on one straight edge in the horizontal direction of the convex corner, and the concave corner and the convex corner are both right angles; the ruler has the advantages that the principle of a vernier caliper is adopted, the first structural body and the second structural body are used in cooperation, and compared with an existing ruler, the ruler can effectively improve the length measuring precision.

The invention discloses a measuring device convenient to use in a narrow space and a measuring method. The measuring device comprises a second main body and a first main body, the first main body comprises a first measuring plate and a first connecting plate which are sequentially connected in the horizontal direction, the first measuring plate is in an isosceles right triangle shape and is provided with a first right-angle side and a second right-angle side, the first right-angle side is horizontally arranged, and the second right-angle side is fixedly connected with one end of the first connecting plate; a first end face is vertically arranged at one horizontal end of the second main body, a second end face is obliquely arranged at the other end of the second main body, an included angle between the second end face and the horizontal plane is 45 degrees, an included angle between one end face of the third measuring plate away from the second measuring plate and the horizontal plane is 45 degrees, and the upper end is away from the second connecting plate; first and second main scales are horizontally arranged at the upper and lower parts of the first connecting plate; and first and second vernier scales are horizontally arranged at the upper and lower parts of the second main body. According to the thickness and gap measuring method, the measuring device is adopted, gap and thickness measurement is facilitated, the structure is simple, and the measuring efficiency is high.

The application discloses a nut classification method and device based on machine vision, equipment and a storage medium. The method comprises the following steps: acquiring a nut image of a nut to be classified; performing feature extraction on the nut image to obtain at least one nut feature image, wherein the nut feature image comprises a plurality of reference pixel points; determining gradient information of each reference pixel point, and determining a target nut radius according to the gradient information; and classifying the nut to be classified according to the target nut radius. The target nut radius is measured according to the nut image, so that the subjective influence of artificial measurement can be avoided. Then, the nut to be classified is classified according to the target nut radius, so that automatic detection and classification of the nut can be realized. Compared with the technical solution in the prior art, in which the nut is measured by contact through a vernier caliper, and then classified according to the measurement result, the accuracy of nut classification can be effectively improved.