32 results about "Circumference measure" patented technology

Difference between a lens edge circumference and an edged lens circumference is controlled to be always within a prescribed range so that a spectacle lens of a properly finished circumference size can always be supplied. A method of supplying a spectacle lens by bevel-edging an uncut spectacle lens based on specified lens edge shape data includes a lens edging step (S2) to rim machine a spectacle lens based on a lens edge shape data and a prescribed edging condition of the spectacle frame, a lens circumference measuring step (S3) to measure the circumference of the spectacle lens bevel-edged by the lens edging step, a circumference difference calculating step (S4) to calculate difference between the lens circumference obtained by the step of measuring the lens circumference and the lens edge circumference of the spectacle frame, and a correcting step (S5 to S11) to correct the circumference correction value stored for every edging condition so as to put the circumferential difference within a prescribed range.

Difference between a lens edge circumference and an edged lens circumference is controlled to be always within a prescribed range so that a spectacle lens of a properly finished circumference size can always be supplied.A method of supplying a spectacle lens by bevel-edging an uncut spectacle lens based on specified lens edge shape data includes a lens edging step (S2) to rim machine a spectacle lens based on a lens edge shape data and a prescribed edging condition of the spectacle frame, a lens circumference measuring step (S3) to measure the circumference of the spectacle lens bevel-edged by the lens edging step, a circumference difference calculating step (S4) to calculate difference between the lens circumference obtained by the step of measuring the lens circumference and the lens edge circumference of the spectacle frame, and a correcting step (S5 to S11) to correct the circumference correction value stored for every edging condition so as to put the circumferential difference within a prescribed range.

The invention provides a cabin cross section circumference measuring device and method based on the non-contact profiling method, and belongs to the technical field of manufacturing and precision measurement. The cabin cross section circumference measuring device comprises a system of a part to be measured, a reference coordinate motor system, a follow-up rocker system and a data collecting, analyzing and processing system. The follow-up rocker system comprises a displacement sensor, a rocker arm, a ball screw, a sliding block, a follow-up servo motor and a counter weight. The data collecting, analyzing and processing system comprises a signal transformer, an analog-to-digital converter, a motion controller and a digital-to-analog converter. The motor drives a rocker arm system to rotate by a circle, the displacement sensor records the coordinate positions of all points to be measured by the adoption of the non-contact method, the shape of the part to be measured is profiled, and the circumference of the part to be measured is calculated. The cabin cross section circumference measuring device and method based on the non-contact profiling method can achieve higher measurement accuracy and cannot scratch the part to be measured at all.

The invention discloses a multi-parameter lower limb foot shape measuring instrument, which comprises a measuring pedal and a circumference measuring device, wherein the measuring pedal is provided with a first strip-shaped groove along the left-right direction; a first slipway is formed in the first strip-shaped groove; the circumference measuring device comprises a tape fixing base for fixing a tape, a spring and a slide block; a through hole is formed in the center of the slide block; the slide block is arranged in the first slipway in a sliding way; the bottom surface of the tape fixing base is provided with a vertical screw rod; the spring is sleeved on the vertical screw rod; and the vertical screw rod is inserted into the through hole in the slide block. According to the multi-parameter lower limb foot shape measuring instrument, the circumference measuring device is arranged on the top surface of the measuring pedal in a sliding way, and can slide leftwards and rightwards in the first slipway as required in a measuring process, so that the circumference of any position of a foot as well as the circumferences and widths of first to fifth metatarsophalangeal parts can be measured; and a plurality of more comprehensive parameters are provided for the feet of a tester, so that suitable shoes can be developed and selected accurately.

A color wheel includes a plurality of color filter segments disposed so as to form a disk configuration, and a support member to fixedly set the plurality of color filter segments in place. Each of the color filter segments has a circular outer circumference, an inner circumference measuring shorter than the outer circumference, and two sides each connecting between the outer circumference and the inner circumference. In the color wheel described above, a chamfer is provided at the innermost portion of at least one of the two sides. The chamfer provides a clearance between opposing sides of any two adjacent color filter segments, so as to house burrs that are often formed at the sides, and therefore the opposing sides are fitted closely to each other even when burrs are formed at the sides. Consequently, spokes generated between two adjacent color filter segments can be minimized.

The invention discloses a program controlled barker, which stores 10 common circumference for hog skin, the cross curve for 8 common thickness, and processing program that controls regulating generator to guide cross curve. The baker is equipped with one automatic hog skin circumference measuring system, so the hog skin circumference is measured when workers grasp hog skin on lift baker. The woker can only determine the thickness of hog skin and start relevant processing program for regulating generator. The cross curve and processing program are adjusted and corrected at a regular time. It is easy even for new worker to get high-quality hog skin without meat.

A device for dimensioning a circumference of a cavity includes a body with a lumen and a distal aperture. The device also includes a longitudinal member extending through the lumen with a distal end and a proximal end. The longitudinal member is capable of slidable movement through the body between retracted and advanced positions. The device also includes a flexible member adapted to conform to a circumference of a cavity contained, e.g., in an intervertebral disc space. The flexible member is operatively connected to a longitudinal member such that upon retraction of the longitudinal member the flexible member retracts into the lumen. When the longitudinal member is moved toward the advanced position, the flexible member is advanced out of the lumen and expands to conform to a dimension which approximates the circumference of the cavity. An apparatus is provided which includes a device for dimensioning a circumference of a cavity and an access member for facilitating conduction of the device to a surgical site, the device adapted and configured to fit within the access member. A kit is provided which includes a working tube incorporating a vertebral distractor, a spreader for assisting and maintaining the vertebral distractor in a distracted configuration, a closing tube for maintaining the working tube in a closed configuration, and a cavity circumference measuring device.

The invention discloses an intelligent measuring tape capable of measuring circumference and a circumference measuring method thereof. When a user needs to measure the circumference, the measuring mode of the intelligent measuring tape is switched to a circumference measuring mode, the inward recessing part of the second casing of the intelligent measuring tape is attached to the part to be measured, and the measuring tape is drawn out of the intelligent measuring tape body until the measuring tape is buckled into the buckling groove of the measuring tape to complete the measurement. After the measurement is completed, the measuring reading of the circumference is remained in the intelligent measuring tape, a user can check the reading at any time without any others' help, so that the user feels convenient in use. Because the Gray codes are directly arranged on the measuring tape, the measuring tape repeatedly sets the Gray codes according to the specified period, each Gray code in a period has a black or white code of a certain width, the Gray codes on the measuring tape can be read by a reading device, the traditional scale reading method is replaced, and the reading stability is enhanced.

The invention relates to a circumference measuring instrument which comprises Y shafts, a cable protective chain, a rotary motor, a workpiece positioning jig, a planetary speed reducer, an auger X shaft, a CCD camera, a displacement sensor, a carrier module and an operation table. During actual use, an operator fixes a workpiece to be tested through the workpiece positioning jig, then the carrier module drives the workpiece to move inward along one Y shaft, meanwhile, the CCD camera and the displacement sensor on the auger X shaft move to the position above the side, carrying the workpiece, of the carrier module, when the workpiece is right in the measurement range of the CCD camera and the displacement sensor, the rotary motor drives the workpiece to rotate, the workpiece starts to be measured, the carrier module on the Y shaft on the other side is moved to the front end of the operation table, the operator can conveniently place the workpiece in the measuring instrument, the steps are repeated, and the Y shafts on the two sides are used for measuring alternatively.

The invention provides a contact type self-service body measuring device, measuring method and medium. The device includes a lifting frame, a circumference measuring structure and an intelligent control device; the circumference measuring structure can move up and down and fixed on the lifting frame, the intelligent control device is arranged on the lifting frame and is in control connection withthe circumference measuring structure, an intelligent electronic ruler, a transmission structure and a mobile holder are fixedly arranged on the circumference measuring structure, the ruler head is fixedly arranged on the mobile holder; when the circumference measurement is carried out, and the measured person stands in the body measuring range of the circumference measuring structure, the heightposition of the circumference measuring structure on the lifting frame is controlled, the mobile holder is controlled to move along the circumference measuring structure, the ruler belt of the intelligent electronic ruler is driven to stretch, and the ruler belt makes contact with the body circumference of the user for measurement. According to the invention, the ruler belt in the contact type self-service body measuring device makes contact with and winds the user's body to carry out the body circumference, so that the interference of clothes is solved, the advantages of wrapping and coveringof the ruler belt can be realized, and the ruler belt can carry out the open measurement in public places when the user wears thin clothes and doesn't need to change clothes.

A hydro turbine includes at least two annular wheel discs, a center shaft disposed at the centers of the annular wheel discs, spokes disposed between the annular wheel discs and the center shaft, and a plurality of blades annularly disposed at the annular wheel discs. The number of the blades is at least 28 and at most the integer number of an outer circumference measured in centimeters of one annular wheel disc. The sum of arc length of one side of all the blades is 0.85-2 times the outer circumference. A blade angle formed between two line segments connecting the middle point to the two endpoints of an arc of each blade is in a range of 100°-170°. A blade installation angle formed between the chord line of the arc and a radius line of each annular wheel disc is in a range of 15°-75°.

The invention discloses a high school mathematics cylinder circumference measuring device. The high school mathematics cylinder circumference measuring device comprises a mounting plate, wherein connecting plates are arranged at the side surface of the mounting plate; four connecting plates are set, and every two adjacent connecting plates are vertically arranged; a sliding slot is formed in eachconnecting plate, and a slide block is slidably connected to the sliding slot; an adjusting hole is formed at the position, corresponding to the slide block, on the side surface of each connecting plate; an adjusting rod is rotatably connected with the inside of the adjusting hole; a scale line is arranged on the surface of the connecting plate; a pointer is arranged at the side surface of the slide block above the sliding plate; a slot is formed in the slot groove of the sliding slot; and a card is arranged at the position, corresponding to the slot, of the slide block. The high school mathematics cylinder circumference measuring device adjusts the position of the adjusting rod to change the position of the slide block so as to enable the slide block to tightly press against the side surface of the cylinder, measures the diameter of the cylinder by reading the scale on the scale line, and calculates the diameter of the circumference through Pid.

The invention discloses an infrared arm circumference measurement instrument. The measurement instrument comprises a pressure sensing armlet, an infrared detection ring, an elbow right-angle ruler, a supporting device, a pressure display screen and an arm circumference display screen, wherein a pressure sensor is arranged inside the pressure sensing armlet, the pressure display screen is arranged outside the pressure sensing armlet, and pressure sensed by the pressure sensor can be displayed on the pressure display screen; the pressure sensing armlet is connected with the infrared detection ring through the supporting device; a plurality of infrared distance measuring sensors are uniformly arranged on the inner side of the infrared detection ring; a processor is arranged in the infrared detection ring, and is used for processing signals detected by the infrared distance measuring sensors to obtain arm circumference data and displaying the arm circumference data on the arm circumference display screen outside the infrared detection ring; and one end of the elbow right-angle ruler is connected with the pressure sensing armlet. The infrared arm circumference measurement instrument is novel in structure and convenient to use, can be used for solving the current clinical problem that the arm circumference measured by human factors is not accurate and improving the precision and efficiency of measurement, and provides reliable basis for clinical detection and arm swelling treatment.

A garment-like absorbent article includes an absorbent chassis that defines a waist opening and first and second leg openings. A longitudinal length of the chassis is optimized in a linear relationship with the waist circumference of the chassis, the circumference measured at 500 grams tension. With respect to the linear relationship, the thickness of the garment is substantially constant along the same line defined by the length and the circumference, and decreases as the y-intercept increases.

The invention discloses a leg circumference measuring instrument comprising a clamping plate. The clamping plate is provided with a pushing device, the clamping plate is provided with an elastic curved plate, the lower end of the clamping plate is provided with a disc, a U-shaped hanging edge is fixedly hinged to the upper end surface of the disc, elastic clamping pieces are fixedly hinged above the edge of one side of the disc away from the clamping plate, and the elastic clamping pieces on the disc on both sides of the clamping plate are laterally symmetrical. A connection frame is fixedly connected to the front side of the intermediate position of the lower end surface of the disc, and the connection frame is transparent in the front and the rear. Ruler plates on two sides slide vertically and synchronously through a linkage rod, the force is applied in motor transmission, so that the ruler plates drive a leather measuring tape connected to move to the corresponding measuring positions. Under the condition that the stress of the fixed legs is consistent, the measuring positions of the two legs are ensured to be the same, and then the leather measuring tape is pulled out from a storage cylinder and wound around the leg by one circumference for measurement. During measurement, a stamp block at the end of the leather measuring tape marks the corresponding position of the leather measuring tape to facilitate recording.

The invention discloses a large cylindrical part outer surface circumference contact type measuring device, and relates to the field of aerospace assembly manufacturing. According to the measuring conditions of the measuring device, a cylindrical part can be horizontally loaded by an existing cylindrical part transferring device, and the cylindrical part can be controlled to accurately auto-rotateby one circle. The circumference is converted into the standard roller rolling distance by using a standard roller with an angle encoder to maintain non-slip rolling on the outer surface of the cylindrical part, and a counter is used for recording a measured value. The measuring device can adapt to the eccentric rotation and the axial movement of the cylindrical part through the axial and radialtwo-degrees-of-freedom design of the measuring head extension cylindrical part. The measuring device can achieve installation stability and disassembly convenience through the decoupling of a supporting frame and a base. According to the measuring device, the operation is easy to achieve, the cost is low, the efficiency is high, the automatic and high-precision measurement of the large cylindricalpart outer surface circumference can be achieved, and a traditional manual tape measuring method is replaced.

The invention discloses a self-service arm circumference measuring ruler which comprises a measuring ruler main board. A scale is arranged in the middle of the measuring ruler main board; a mobile baffle is arranged to be perpendicular to the measuring ruler main board and is in sliding connection with the measuring ruler main board; a vertical baffle is vertically arranged at the end of the zeroscale line of the measuring ruler main board, and the vertical baffle and the mobile baffle are arranged on the upper side and the lower side of the measuring ruler main board respectively; a divisionbar is arranged along the middle area of the measuring ruler, and a gap is left between the division bar and the measuring ruler main board; each flexible ruler comprises a ruler box and a measuringtape, wherein the ruler box is internally provided with a wind spring and provided with an opening allowing the tape ruler to stretch out and draw back, the wind spring provides spring force to make the measuring tape automatically roll up, the measuring tape penetrates through the gap between the division bar and the measuring ruler main board, part of the circumference of the ruler box is arranged to be the cambered surface, and one end of the cambered surface is connected with with the opening. By means of the measuring ruler, it can be guaranteed that the same measuring part is measured multiple times, and the measurement accuracy is ensured.

The invention discloses a multi-parameter lower limb foot shape measuring instrument, which comprises a measuring pedal and a circumference measuring device, wherein the measuring pedal is provided with a first strip-shaped groove along the left-right direction; a first slipway is formed in the first strip-shaped groove; the circumference measuring device comprises a tape fixing base for fixing a tape, a spring and a slide block; a through hole is formed in the center of the slide block; the slide block is arranged in the first slipway in a sliding way; the bottom surface of the tape fixing base is provided with a vertical screw rod; the spring is sleeved on the vertical screw rod; and the vertical screw rod is inserted into the through hole in the slide block. According to the multi-parameter lower limb foot shape measuring instrument, the circumference measuring device is arranged on the top surface of the measuring pedal in a sliding way, and can slide leftwards and rightwards in the first slipway as required in a measuring process, so that the circumference of any position of a foot as well as the circumferences and widths of first to fifth metatarsophalangeal parts can be measured; and a plurality of more comprehensive parameters are provided for the feet of a tester, so that suitable shoes can be developed and selected accurately.

A portable multipurpose livestock body circumference measuring tool belongs to the measurement tool technology field, and is characterized in that the left end of a main rod I is fixedly connected with the right end of a supporting plate, a pin shaft hole I of a main rod II is connected with a pin shaft hole II of a connecting plate movably, and a master sliding block is connected with the inner wall of the main rod II slidably; a slave sliding block is connected with the two top chutes of the two main rods slidably, the left end of a measuring rope I is fixedly connected with the center of a wire wheel via a through hole of the master sliding block, and the right end of a measuring rope II is fixedly connected with the top end of a semi-circular measurement head II in a lasso via a connecting head I and a semi-circular measurement head I; the left end of the connecting head I is fixedly connected with the right end of the main rod II via a screw, and the left end of a connecting head II is fixedly connected with the right end of a main rod V via a screw; an instrument box is fixedly connected with the left part of the main rod I, a range finder is placed in the instrument box, the orientation of the measuring head of the range finder is consistent with the direction of the end not having a baffle of the instrument box, and the included angle of the measuring head and a baffle in a sliding baffle right ahead the measuring head is 90 degrees. The portable multipurpose livestock body circumference measuring tool of the present invention adopts the wireless range finding for the first time, is high in measurement safety and low in labor intensity, is rapid and accurate, and is convenient to carry.

The invention relates to a method for measuring the outer circumference and maximum and minimum diameters of a cylindrical workpiece. The method comprises the following steps of: measuring device preparation; and data measuring and recording. According to the measuring device preparation step, a laser displacement sensor is adopted; and the laser displacement sensor rotates around a to-be-measuredcylindrical workpiece or the to-be-measured cylindrical workpiece rotates around the center axis of the to-be-measured cylindrical workpiece and the laser displacement sensor is stationary. Accordingto the data measuring and recording step, M measuring points are selected from the to-be-measured cylindrical workpiece; measurement is initiated; with every four points taken as a group, the measurement data of every four points are fitted into a circle according to a certain rule; the sum of the arc lengths of two diagonal short arcs is calculated, so that the diameter and arc length of the four-point group is obtained; and the arc lengths of all the four-point groups are added, so that a required perimeter can be obtained; and a maximum value and a minimum value are found out from the diameters of all the four-point groups, so that a required maximum diameter and a required minimum diameter can be obtained. With the method of the invention adopted, the precision and stability of perimeter measurement are improved; and requirements for the roundness of a workpiece and the centering degree of the installation of the workpiece are greatly lowered. The method has a high engineering application value.

The invention provides a leg circumference measuring ruler used for deep venous thrombosis judgment. The leg circumference measuring ruler comprises a flexible ruler and a ruler head; the ruler head comprises an upper cover plate, a frame and a lower cover plate; the upper cover plate is combined on the upper side of the frame, and the lower cover plate is combined on the lower side of the frame;a notch is formed in the middle of the left end of the frame; a sliding block is mounted in the ruler head; the left end of the sliding block is connected with the right end of the flexible ruler, andthe left end of the flexible ruler extends from the notch to the exterior; one or more springs are mounted in the ruler head, the left ends of the springs are connected to the right end of the sliding block, and the right ends of the springs are connected to the inner side of the right end of the frame; the upper cover plate is formed to be transparent, and a first scale line is formed on the upper face of the upper cover plate; a second scale line is formed on the sliding block; and every time the leg circumference is measured, the first scale line is aligned with the second scale line. By arranging the springs in the ruler head, tightening force or tension applied to the flexible ruler during leg circumference measuring is reflected by extension and retraction of the springs, thus the degree of tightening a leg by the flexible ruler is reflected, and consistency of multiple times of measurement is ensured.

The invention provides a taper thermal transfer printing machine capable of thermally printing on a conical surface, and belongs to the technical field of thermal transfer printing. The problem that the thermal transfer printing is unlikely to be conducted for a tapered product in the existing market can be effectively solved by the invention. The taper thermal transfer printing machine comprises a base, wherein a base plate is arranged on the base and is connected with a membrane frame corner plate; an arc rack is arranged on the membrane frame corner plate; a vertical shifting plate is connected to the upper surface of the membrane frame corner plate in a sliding form by two linear guiding rails; a winding membrane guiding frame and an unwinding membrane guiding frame are respectively fixed on both sides of the vertical moving plate; a printing substrate circumference measuring device is arranged on the winding membrane guiding frame; a flower-membrane smoothing roller is arranged on the unwinding membrane guiding frame; a vertical post is arranged on the base plate; a multi-direction tool is arranged on the vertical post; and a lifting thermal-printing roller is arranged on the multi-direction tool. With the adoption of the taper thermal transfer printing machine, a pattern can be transfer-printed on a tapered printing substrate accurately and perfectly, without deformations and wrinkle, so that the product quality is stable; in addition, the taper thermal transfer printing machine is safe and reliable, and is low in cost and high in efficiency.

The invention discloses a method and tool of measuring distance between shafts for a straightening roller, and a manufacturing method of the tool, and specifically relates to a method of measuring distance between shafts for a straightening roller for the technical field of straightening. The method of measuring distance between shafts for a straightening roller includes the following steps: A, calculating the corresponding relationship between the outer circumference around the periphery of three large shafts of the roller and the vertical distance between a pressing roller and a fixed rolleraccording to the size and positional relationship between the large shaft of the pressing roller and the large shaft of the fixed roller; B, measuring the outer circumference of the three large shafts of the roller; and C, according to the corresponding relationship in the step A, obtaining a result that the vertical distance, between the pressing roller and the fixed roller, corresponding to theouter circumference measured in the step B, is the distance between shafts for the straightening roller. The method of measuring distance between shafts for a straightening roller can quickly measurethe distance between shafts for the straightening roller and can significantly improve the measurement accuracy for the distance between shafts for the straightening roller.

A color wheel includes a plurality of color filter segments disposed so as to form a disk configuration, and a support member to fixedly set the plurality of color filter segments in place. Each of the color filter segments has a circular outer circumference, an inner circumference measuring shorter than the outer circumference, and two sides each connecting between the outer circumference and the inner circumference. In the color wheel described above, a chamfer is provided at the innermost portion of at least one of the two sides. The chamfer provides a clearance between opposing sides of any two adjacent color filter segments, so as to house burrs that are often formed at the sides, and therefore the opposing sides are fitted closely to each other even when burrs are formed at the sides. Consequently, spokes generated between two adjacent color filter segments can be minimized.

The invention discloses an intelligent measuring tape capable of measuring circumference and a circumference measuring method thereof. When a user needs to measure the circumference, the measuring mode of the intelligent measuring tape is switched to a circumference measuring mode, the inward recessing part of the second casing of the intelligent measuring tape is attached to the part to be measured, and the measuring tape is drawn out of the intelligent measuring tape body until the measuring tape is buckled into the buckling groove of the measuring tape to complete the measurement. After the measurement is completed, the measuring reading of the circumference is remained in the intelligent measuring tape, a user can check the reading at any time without any others' help, so that the user feels convenient in use. Because the Gray codes are directly arranged on the measuring tape, the measuring tape repeatedly sets the Gray codes according to the specified period, each Gray code in a period has a black or white code of a certain width, the Gray codes on the measuring tape can be read by a reading device, the traditional scale reading method is replaced, and the reading stability is enhanced.

The invention discloses a magnetic semicircle circumference measuring instrument for bearing bushes, which comprises a main body assembly (1) and a bearing bush semicircle mold assembly (2) connected thereto. The precision touch sensor assembly (3), on the upper part of the high precision touch sensor assembly (3) is provided with a negative pole magnetic force assembly (4), a negative pole booster magnetic force assembly (5), and a positive pole mandrel assembly (6) from right to left ), the positive pole assisting force magnetic assembly (7), the positive pole magnetic force external force assembly (8), the positive pole assisting force magnetic assembly (7) is placed in the positive pole magnetic force external force assembly (8), the positive pole mandrel assembly (6) and The high-precision touch sensor assembly (3) is connected, and a display assembly (9) is arranged on the other side of the upper part of the bearing bush semicircular mold assembly (2). It has the advantages of high detection efficiency, high precision, light weight, simple and convenient operation, automatic data conversion, safety and environmental protection, etc.

The invention discloses a multifunctional cigarette measuring tray. The multifunctional cigarette measuring tray comprises a cigarette measuring tray body; a cigarette length measuring groove and a plurality of cigarette circumference measuring holes are formed in the cigarette measuring tray body; an LED lamp mounting groove used for detecting the laser drilling quality of a cigarette is arrangedbelow the cigarette length measuring groove; the LED lamp mounting groove is formed in the back and / or the bottom of the lower part of the cigarette length measuring groove, and is used for laser drilling quality detection of the side surfaces and / or the end surfaces of a cigarette filter tip; and a battery box and a switch box are arranged below the LED lamp mounting groove. The cigarette measuring tray can obviously observe the quality problem on the length of tipping paper and the length of the cigarette; an operator can be assisted in judging whether the circumference of the cigarette exceeds the standard or not; and whether the laser drilling number of 20 cigarettes is correct or not can be detected at one time, so that convenience and rapidness are achieved.

The invention provides a cabin cross section circumference measuring device and method based on the non-contact profiling method, and belongs to the technical field of manufacturing and precision measurement. The cabin cross section circumference measuring device comprises a system of a part to be measured, a reference coordinate motor system, a follow-up rocker system and a data collecting, analyzing and processing system. The follow-up rocker system comprises a displacement sensor, a rocker arm, a ball screw, a sliding block, a follow-up servo motor and a counter weight. The data collecting, analyzing and processing system comprises a signal transformer, an analog-to-digital converter, a motion controller and a digital-to-analog converter. The motor drives a rocker arm system to rotate by a circle, the displacement sensor records the coordinate positions of all points to be measured by the adoption of the non-contact method, the shape of the part to be measured is profiled, and the circumference of the part to be measured is calculated. The cabin cross section circumference measuring device and method based on the non-contact profiling method can achieve higher measurement accuracy and cannot scratch the part to be measured at all.

The invention relates to a measuring device, in particular to a cylinder circumference measuring device of senior high school mathematics, and aims to provide a cylinder circumference measuring device of the senior high school mathematics, which is simple to operate, accurate to measure, and high in measuring efficiency. The device comprises a hanging plate, a rotating shaft, a circular disc, a bearing seat I, a gear ring, a motor I, a gear, cylinders I, clamping blocks, a motor II, a bearing seat II, a bearing seat III, a supporting rod I, a paper rolling barrel, a lead screw, a nut, an air pump, a cylinder II, a cylinder III, a glue stick, an air tube, a sucker, a pressing wheel I, a piece of paper, a supporting rod II, a positioning platform and a pressing wheel II, wherein the rotating shaft is arranged in the center of the hanging plate; the circular disc is arranged on the front side of the hanging plate; the bearing seat I is arranged in the center of the circular disc; the bearing seat I is matched with the rotating shaft. The device has the effects of being simple to operate, accurate to measure, and high in measuring efficiency.