High-accuracy measuring system for standard volume of deep-hole large-size pipe section and use method of high-accuracy measuring system

Abstract

The invention relates to the technical field of intelligent instrument metering, in particular to a high-accuracy measuring system for the standard volume of a deep-hole large-size pipe section and a using method, the measuring system comprises a measuring main body and a laser interferometer, the measuring main body is connected with one side of the measured pipe section, and the laser interferometer is independently installed on the other side of the measured pipe section; the measuring main body comprises a limiting device, a measuring device, a measuring platform and an upper computer, the measuring device is installed on the limiting device, the limiting device is installed on the measuring platform, the upper computer is installed on the measuring platform, the upper computer is arranged on the front side of the limiting device, a distance space is arranged between the laser interferometer and the limiting device, and the height of the laser interferometer is aligned with the height of the measuring device. The measuring device is wirelessly connected with the upper computer, and the laser interferometer is connected with the upper computer through a serial port. According to the system and the use method provided by the invention, the problem of high-accuracy, high-efficiency and non-destructive measurement of the standard volume of the deep-hole large-diameter pipe section is effectively solved.

Description

Technical Field

[0001] This invention relates to the technical field of intelligent instrument measurement, and in particular to a high-accuracy measurement system and method for using a standard volume measurement system for large-diameter deep-hole pipe sections. Background Technology

[0002] Deep-hole pipe fittings are widely used in fields such as mechanical engineering, oil and gas, and metering. They are used in hydraulic cylinders, various pipelines, oil drilling casings, and artillery barrels. The measurement requirements for parameters such as inner diameter, length, inner diameter tolerance, and roughness of these pipe sections are relatively high. In particular, for piston-type flow standard devices and standard pipe sections of volume tubes, the volume used as a metrological standard value places higher demands on the accuracy of measurement.

[0003] With the development of modern measurement technology, the measurement technology for small and medium-sized pipe fittings has become increasingly sophisticated. However, there is no ideal method for measuring large-diameter deep-hole pipe sections. Currently, many large-diameter inner diameters are still measured using conventional measuring equipment such as large internal micrometers and calipers. Furthermore, for long pipe sections, measurements can only be taken at the two ends of the pipe. This method results in a limited sampling section and cannot measure the inner diameter tolerance of the entire long pipe section. The length of the pipe section is generally measured directly with a ruler. This method is inefficient, inaccurate, easily affected by the environment and operators, and has poor reproducibility. It cannot meet the measurement requirements of machining enterprises, nor can it meet the needs of standard devices such as volumetric tubes for accurate measurement of the standard volume of standard pipe sections. Therefore, to address these shortcomings, this invention provides a high-accuracy measurement system and method for measuring the standard volume of large-diameter deep-hole pipe sections. Summary of the Invention

[0004] The purpose of this invention is to provide a high-accuracy measurement system and method for standard volume of deep-hole large-size pipe sections. This is to solve the problems of low measurement efficiency, poor measurement accuracy, susceptibility to environmental and operator influences, and poor reproducibility of conventional measurement methods, which cannot meet the measurement requirements of machining enterprises, let alone the need for accurate measurement of standard pipe sections by standard devices such as volume tubes.

[0005] To achieve the above objectives, the present invention provides a high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections, comprising: The pipe section under test is connected to the measuring body and the laser interferometer on both sides respectively. The measuring body includes a limiting device, a measuring device, a measuring platform and a host computer. The measuring device is installed on the limiting device and the limiting device is installed on the measuring platform. The host computer is installed on the measuring platform (5). The front side of the limiting device is the host computer. There is a distance space between the laser interferometer and the limiting device. The height of the laser interferometer is aligned with the measuring device. The measuring device is wirelessly connected to the host computer. The laser interferometer is connected to the host computer via a serial port. The measuring device includes a support mechanism, a housing, a lithium battery, a control box, a first drive mechanism, a second drive mechanism, a scanning mechanism, an adjustment mechanism, a counterweight, a motor driver, and a synchronous belt buckle. Limiting devices are connected to the outer ends of the housing via synchronous belt buckles. The support mechanism is installed on the outside of the housing and is connected to the pipe section being measured. The control box, lithium battery, drive mechanism, scanning mechanism, adjustment mechanism, counterweight, and motor driver are installed inside the housing. The adjustment mechanism is located below the lithium battery, control box, counterweight, and motor driver. The control box and counterweight are located on either side of the lithium battery, and the motor driver is located on the other side of the counterweight. The other end of the motor driver is connected to the scanning mechanism. The adjustment mechanism is connected to the first drive mechanism, and the scanning mechanism is connected to the second drive mechanism.

[0006] Preferably, the limiting device includes a frame, a standard ring gauge, an adjusting rod, and adjusting wheels. A housing is installed inside the frame, a standard ring gauge is installed on the right side of the frame, a timing belt buckle is installed between the standard ring gauge and the housing, and adjusting wheels are installed at the four corners of the frame, with an adjusting rod installed at the lower end of each adjusting wheel.

[0007] Preferably, the adjustment mechanism includes an adjustment motor, an adjustment reducer, an adjustment encoder, a driven adjustment gear, a gyroscope, an adjustment timing belt, a driving adjustment gear, and an adjustment wheel. The control box and the adjustment encoder are located on opposite sides of the adjustment reducer. The adjustment motor is located at the lower end of the adjustment encoder, and the driving adjustment gear is located below the adjustment motor. The other side of the adjustment motor is connected to a first drive mechanism. An adjustment timing belt is installed between the driving and driven adjustment gears. An adjustment wheel is installed below the driving and driven adjustment gears. The control box, lithium battery, counterweight, and motor driver are sequentially mounted on the adjustment timing belt. The gyroscope is located in front of the lithium battery and is mounted on the housing.

[0008] Preferably, the first drive mechanism includes a drive timing belt, a drive gear, a drive pulley, a drive reducer, and a drive motor. Above the drive reducer are the adjustment motor and the drive gear. The drive gear meshes with the drive pulley at the rear. The drive gear is connected to the second drive mechanism via the drive timing belt. The drive motor is installed on the other side of the drive reducer.

[0009] Preferably, the scanning mechanism includes a scanning motor, a scanning reducer, a scanning wheel mechanism, a scanning encoder, a scanning fixed plate, a mounting bracket, displacement sensors, and a scanning rotary table. The scanning motor has an electric driver and a scanning reducer on each side, respectively. The scanning reducer is connected to a scanning gear mechanism on the other side, and the scanning gear mechanism is connected to a scanning encoder and a scanning rotary table on the other side. The scanning encoder is located below the scanning rotary table, and the scanning fixed plate is connected to the other side of the scanning encoder. The scanning fixed plate is mounted on the mounting bracket, and multiple displacement sensors are mounted on the lower outer side of the mounting bracket.

[0010] Preferably, the scanning gear mechanism includes an active scanning gear and a driven scanning gear, with the driven scanning gear meshing on the lower side of the active scanning gear. The active scanning gear has a scanning reducer and a scanning encoder on its two sides, respectively, and the driven scanning gear has a second drive mechanism and a scanning rotary table on its two sides.

[0011] Preferably, the second drive mechanism includes a driven drive gear and a driven drive pulley, with a scanning reducer above the driven drive gear, the driven drive pulley meshing behind the driven drive gear, and a drive speed reduction belt installed on the outer side of the driven drive gear.

[0012] Preferably, the support mechanism includes a spring slider and a support slider. Two support sliders are installed below the outer sides of both ends of the housing, and a spring slider is installed above the outer sides of both ends of the housing. The two support sliders and one spring slider are evenly installed on the housing at a 120° angle. The lower side of the inner wall of the pipe section being tested is below the support slider, and the upper side of the inner wall of the pipe section being tested is above the spring slider.

[0013] This invention also provides a method for using a high-accuracy measurement system based on the standard volume of a large-size deep-hole pipe section, comprising: Step 1: Check whether the electrical connections between the various mechanisms of the laser interferometer and measuring device are correct, and whether the communication function between the laser interferometer, motor driver, control box, and host computer is established; Step 2: Install the standard ring gauge and measuring device into the limiting device on the measuring platform, push the measuring platform to one end of the pipe section to be measured, adjust the height adjustment wheel to align the limiting device with the pipe section to be measured, fix it with the flange, and then adjust the measuring optical path of the laser interferometer to align the moving axis of the measuring device. Step 3: Start the scanning mechanism of the measuring device to measure the standard ring gauge, and compare the inner diameter measured by the measuring device with the standard value of the standard ring gauge; Step 4: Wind the drive timing belt into the measuring device, and clamp both ends of the drive timing belt onto the timing belt buckles of the limiting device and the two ends of the pipe section being measured, respectively, while ensuring that the timing belt is in a straight and taut state. Step 5: Activate all mechanisms of the measuring device to start measuring within the pipe section being measured. Obtain the real-time attitude of the measuring device through the adjustment mechanism, obtain the inner diameter of several cross-sections of the pipe section being measured through the scanning mechanism, obtain the length of the pipe section being measured through the laser interferometer, calculate the standard volume of the pipe section being measured, and simultaneously generate a report on the host computer.

[0014] Preferably, in step three, the measured inner diameter of the measuring device is compared with the standard values ​​of the three inner diameter standard ring gauges to correct the calculation model and ensure the accuracy of the measured inner diameter of the measuring device within the three inner diameter ranges.

[0015] Preferably, in step five, the first drive mechanism and the second drive mechanism of the measuring device drive the measuring device to move a set distance along the synchronous belt within the pipe section being measured, and the scanning mechanism measures the inner diameter of the section being measured.

[0016] Preferably, in step five, the attitude value is obtained by a gyroscope, the non-horizontal attitude of the measuring device is adjusted by an adjustment mechanism, and the inner diameters of several measured sections are converted into an average value by a scanning mechanism. The average value of the measured section inner diameters is denoted as R, and the length of the measured pipe section obtained by the laser interferometer is denoted as L. The volume of a cylinder is calculated using the formula V=πR. 2 L is then used to calculate the standard volume of the pipe section being tested.

[0017] The high-accuracy measurement system and method for measuring the standard volume of large-size deep-hole pipe sections provided by this invention have the following beneficial effects: The present invention provides a high-accuracy measurement system and method for the standard volume of deep-hole large-diameter pipe sections. The acquired signal is wirelessly transmitted to the host computer. The measurement process is fully automated. The pipe to be measured is divided into several micro-cylinders. The base area, inner diameter and height of each micro-cylinder are measured to calculate the volume of the micro-cylinder. Finally, an integral model of the standard volume of the pipe is established. This effectively solves the problem of high-accuracy, high-efficiency and non-destructive measurement of the standard volume of deep-hole large-diameter pipe sections. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a measurement scenario for a high-accuracy measurement system for standard volume of deep-hole large-size pipe sections according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the overall system of the high-accuracy measurement system for standard volume of deep-hole large-size pipe sections according to an embodiment of the present invention; Figure 3 This is a structural diagram of the limiting device according to an embodiment of the present invention; Figure 4 This is an overall structural diagram of the measuring device according to an embodiment of the present invention; Figure 5 This is a partial structural diagram of the measuring device according to an embodiment of the present invention.

[0019] Legend: 1. Measuring body; 2. Laser interferometer; 3. Limiting device; 4. Measuring device; 5. Measuring platform; 6. Host computer; 3-1. Frame; 3-2. Standard ring gauge; 3-3. Height adjustment rod; 3-4. Height adjustment wheel; 4-1. Spring slider; 4-2. Support slider; 4-3. Housing; 4-4. Drive synchronous belt; 4-5. Active drive gear; 4-6. Active drive pulley; 4-7. Adjusting motor; 4-8. Adjusting reducer; 4-9. Adjusting encoder; 4-10. Control box; 4-11. Lithium battery; 4-12. Counterweight; 4-13. Motor driver; 4-14. Scanning motor ; 4-15, Scanning reducer; 4-16, Active scanning gear; 4-17, Scanning encoder; 4-18, Scanning mounting plate; 4-19, Mounting bracket; 4-20, Displacement sensor; 4-21, Driven scanning gear; 4-22, Driven drive gear; 4-23, Driven drive pulley; 4-24, Driven adjusting gear; 4-25, Gyroscope; 4-26, Adjusting synchronous belt; 4-27, Active adjusting gear; 4-28, Adjusting wheel; 4-29, Drive reducer; 4-30, Drive motor; 4-31, Synchronous belt buckle; 4-32, Scanning rotary table; A-Tested pipe section. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Figure 1 This is a schematic diagram of the high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the overall system of the high-accuracy measurement system for standard volume of large-size deep-hole pipe sections according to an embodiment of the present invention. (Refer to...) Figure 1 and Figure 2 The present invention provides a high-accuracy measurement system for the standard volume of a large-size deep-hole pipe section, comprising: The tested pipe segment A has a measuring body 1 and a laser interferometer 2 connected to its two sides respectively. The measuring body 1 includes a limiting device 3, a measuring device 4, a measuring platform 5, and a host computer 6. The measuring device 4 is mounted on the limiting device 3, the limiting device 3 is mounted on the measuring platform 5, and the host computer 6 is mounted on the measuring platform 5. The host computer 6 is located in front of the limiting device 3. There is a distance space between the laser interferometer 2 and the limiting device 3. The height of the laser interferometer 2 is aligned with the measuring device 4. The measuring device 4 is wirelessly connected to the host computer 6, and the laser interferometer 2 is connected to the host computer 6 via a serial port.

[0022] In this embodiment, the laser interferometer 2 is placed on one side of the pipe segment A to be measured and aligned with the measuring device 4, and is used to collect the length data of the pipe segment to be measured; the measuring platform 5 is equipped with a limit device 3 and a host computer 6, which is used to move the limit device 3 to align it with the end face of the pipe segment A to be measured; the host computer 6 is an industrial control computer, which is used to set motion parameters, record and process measurement data, display data in real time, coordinate motion control and generate measurement reports.

[0023] Figure 4 This is an overall structural diagram of the measuring device according to an embodiment of the present invention. Figure 5 This is a partial structural diagram of the measuring device according to an embodiment of the present invention, such as... Figure 4 and Figure 5 As shown, the measuring device 4 includes a support mechanism, a housing 4-3, a lithium battery 4-11, a control box 4-10, a first drive mechanism, a second drive mechanism, a scanning mechanism, an adjusting mechanism, a counterweight 4-12, a motor driver 4-13, and a synchronous belt buckle 4-31. The outer ends of the housing 4-3 are connected to the limiting device 3 via the synchronous belt buckle 4-31. The support mechanism is installed on the outside of the housing 4-3, and the support mechanism is connected to the pipe section A being measured. The control box 4-10, the lithium battery 4-11, and the driver 4-12 are installed inside the housing 4-3. The device includes a driving mechanism, a scanning mechanism, an adjusting mechanism, a counterweight 4-12, and a motor driver 4-13. Below the lithium battery 4-11, the control box 4-10, the counterweight 4-12, and the motor driver 4-13 is the adjusting mechanism. On both sides of the lithium battery 4-11 are the control box 4-10 and the counterweight 4-12, respectively. On the other side of the counterweight 4-12 is the motor driver 4-13. The other end of the motor driver 4-13 is connected to the scanning mechanism. The adjusting mechanism is connected to the first driving mechanism, and the scanning mechanism is connected to the second driving mechanism.

[0024] In this embodiment, the housing 4-3 of the measuring device 4 is made of aluminum alloy and serves as the mounting base for the adjustment mechanism, scanning mechanism, lithium battery 4-11, first drive mechanism, second drive mechanism and support mechanism, bearing the load-bearing function of the measuring device 4.

[0025] In practical applications, the control box 4-10 of the measuring device 4 is mainly a single-chip microcomputer circuit, which is used to realize functions such as data acquisition, control of the first driving mechanism, the second driving mechanism, the adjustment mechanism, the scanning mechanism, and status monitoring.

[0026] In this embodiment, the motor driver 4-13 of the measuring device 4 is installed inside the housing 4-3 and is used to provide drive signals to the motors of the first drive mechanism, the second drive mechanism, the adjustment mechanism and the scanning mechanism.

[0027] It should be noted that the two timing belt clips 4-31 are respectively installed at the head end of the pipe section A being tested and the tail end of the limiting device 3 by bolts.

[0028] Figure 3 This is a structural diagram of the limiting device according to an embodiment of the present invention, as shown below. Figure 3 As shown, the limiting device 3 includes a frame 3-1, a standard ring gauge 3-2, an adjusting rod 3-3, and adjusting wheels 3-4. The housing 4-3 is installed inside the frame 3-1. The standard ring gauge 3-2 is installed on the right side of the frame 3-1. A timing belt buckle 4-31 is installed between the standard ring gauge 3-2 and the housing 4-3. Adjusting wheels 3-4 are installed around the frame 3-1. An adjusting rod 3-3 is installed at the lower end of each adjusting wheel 3-4.

[0029] In this embodiment, the limiting device 3 consists of a standard ring gauge 3-2, four height adjustment rods 3-3, four height adjustment wheels 3-4, and a frame 3-1. The standard ring gauge 3-2 is made of bearing steel with high precision machining and is installed on one side of the frame 3-1. The limiting device 3 is installed on the measuring platform 5 through the height adjustment rods 3-3 and the height position of the frame 3-1 is controlled by the height adjustment wheels 3-4. The limiting device 3 is connected to the pipe section being measured through a flange to achieve the limiting function.

[0030] In practical applications, the adjustment mechanism includes an adjustment motor 4-7, an adjustment reducer 4-8, an adjustment encoder 4-9, a driven adjustment gear 4-24, a gyroscope 4-25, an adjustment timing belt 4-26, a driving adjustment gear 4-27, and an adjustment wheel 4-28. The control box 4-10 and the adjustment encoder 4-9 are located on either side of the adjustment reducer 4-8. The adjustment motor 4-7 is located at the lower end of the adjustment encoder 4-9, and the driving adjustment gear 4-27 is located below the adjustment motor 4-7. On the other side of 7, the first drive mechanism is connected. An adjustment timing belt 4-26 is installed between the active adjustment gear 4-27 and the driven adjustment gear 4-24. An adjustment wheel 4-28 is installed below the active adjustment gear 4-27 and the driven adjustment gear 4-24. The control box 4-10, lithium battery 4-11, counterweight 4-12 and motor driver 4-13 are arranged in sequence on the adjustment timing belt 4-26. A gyroscope 4-25 is located in front of the lithium battery 4-11. The gyroscope 4-25 is mounted on the housing 4-3.

[0031] Meanwhile, it should be noted that the adjustment structure obtains the attitude change of the measuring device 4 through the gyroscope 4-25 and feeds the attitude change back to the control box 4-10. The control box 4-10 issues a control command to control the output of the adjusting motor 4-30 by the adjusting encoder 4-9 to achieve the steering control of the adjusting wheel 4-28, thereby achieving the adjustment of the attitude of the measuring device 4.

[0032] In this system, the first drive mechanism includes a drive timing belt 4-4, a drive gear 4-5, a drive pulley 4-6, a drive reducer 4-29, and a drive motor 4-30. Above the drive reducer 4-29 are the adjustment motor 4-7 and the drive gear 4-5. The drive pulley 4-6 meshes with the drive gear 4-5 at the rear. The drive gear 4-5 is connected to the second drive mechanism through the drive timing belt 4-4. The drive motor 4-30 is installed on the other side of the drive reducer 4-29.

[0033] In this embodiment, the two ends of the drive timing belt 4-4 are connected to the timing belt buckle 4-31 through the central through hole of the measuring device 4, and the power is transmitted to the drive reducer 4-29 through the drive motor 4-30. The drive reducer 4-29 drives the active drive gear 4-5 and the active drive pulley 4-6 to realize the displacement of the measuring device 4 along the drive timing belt 4-4 in the axial direction of the pipe section being measured.

[0034] In practical applications, the scanning mechanism includes a scanning motor 4-14, a scanning reducer 4-15, a scanning wheel mechanism, a scanning encoder 4-17, a scanning mounting plate 4-18, a mounting bracket 4-19, displacement sensors 4-20, and a scanning rotary table 4-32. The scanning motor 4-7 has an electric driver 4-13 and a scanning reducer 4-15 on either side. The other side of the scanning reducer 4-15 is connected to the scanning gear mechanism, and the other side of the scanning gear mechanism is connected to the scanning encoder 4-17 and the scanning rotary table 4-32. The scanning encoder 4-17 is located below the scanning rotary table 4-32. The other side of the scanning encoder 4-17 is connected to the scanning mounting plate 4-18. The scanning mounting plate 4-18 is mounted on the mounting bracket 4-19, and multiple displacement sensors 4-20 are mounted on the lower outer side of the mounting bracket 4-19.

[0035] In this embodiment, the scanning motor 4-14 is connected to the scanning reducer 4-15 and to the housing 4-3 via a connecting block. The output shaft of the reducer passes sequentially through the active scanning gear 4-16 and the scanning encoder 4-17, and is connected via a flat key. The active scanning gear 4-16 is coupled to the driven scanning gear 4-21, which is mounted on the scanning rotary table 4-32 and connected to the housing 4-3 via a scanning fixing plate 4-18. Three displacement sensors 4-20 are evenly mounted on the mounting bracket 4-19 at a 120° angle. The mounting bracket 4-19 is connected to the scanning rotary table 4-32. The scanning mechanism drives the active scanning gear 4-16 to rotate via the scanning drive motor 4-30 and the scanning reducer 4-15. Through gear coupling, the driven scanning gear 4-21 and the scanning rotary table 4-32 rotate, thereby driving the mounting bracket 4-19 to rotate and realizing the rotational scanning measurement of the three displacement sensors 4-20. The control and measurement of the rotation angle are achieved through the scanning encoder 4-17.

[0036] In this system, the scanning gear mechanism includes an active scanning gear 4-27 and a driven scanning gear 4-24. The lower side of the active scanning gear 4-27 meshes with the driven scanning gear 4-24. The two sides of the active scanning gear 4-27 are the scanning reducer 4-15 and the scanning encoder 4-17, respectively. The two sides of the driven scanning gear 4-24 are the second drive mechanism and the scanning rotary table 4-32.

[0037] In practical applications, the second drive mechanism includes a driven drive gear 4-22 and a driven drive pulley 4-23. Above the driven drive gear 4-22 is a scanning reducer 4-15, and behind the driven drive gear 4-22 is the driven drive pulley 4-23. A drive speed reduction belt 4-4 is installed on the outside of the driven drive gear 4-22. That is to say, there is a drive speed reduction belt 4-4 between the driven drive gear 4-22 and the driving gear 4-5.

[0038] In this system, the support mechanism includes a spring slider 4-1 and a support slider 4-2. Two support sliders 4-2 are installed on the lower outer sides of both ends of the housing 4-3, and spring sliders 4-1 are installed on the upper outer sides of both ends of the housing 4-3. The two support sliders 4-2 and one spring slider 4-1 are evenly installed on the housing 4-3 at a 120° angle. The upper side of the support slider 4-2 is the lower inner wall of the pipe section A being measured, and the lower side of the spring slider 4-1 is the upper inner wall of the pipe section A being measured, thus achieving stable support of the measuring device 4 within the pipe section A being measured.

[0039] This invention also provides a method for using a high-accuracy measurement system based on the standard volume of a large-size deep-hole pipe section, comprising: Step 1: Check whether the electrical connections between the various mechanisms of the laser interferometer 2 and the measuring device 4 are correct, and whether the communication function between the laser interferometer 2, the motor driver 4-13, the control box 4-10, and the host computer 6 is established. Step 2: Install the standard ring gauge 3-2 and the measuring device 4 into the limiting device 3 on the measuring platform 5, and push the measuring platform 5 to one end of the pipe section A to be measured. Adjust the height adjustment wheel 3-4 to align the limiting device 3 with the pipe section A to be measured, and then fix it with the flange. Then adjust the measuring optical path of the laser interferometer 2 to align the moving axis of the measuring device 4. Step 3: Start the scanning mechanism of measuring device 4 to measure standard ring gauge 3-2, and compare the inner diameter measured by measuring device 4 with the standard value of standard ring gauge 3-2; Step 4: Wind the drive timing belt 4-4 into the measuring device 3, and clamp both ends of the drive timing belt 4-4 onto the timing belt buckles 4-31 at the limiting device 3 and the two ends of the pipe section A being measured, while ensuring that the timing belt is in a straight and taut state. Step 5: Activate all mechanisms of measuring device 4 to start measuring within the pipe section to be measured. Obtain the real-time attitude of measuring device 4 through the adjustment mechanism, obtain the inner diameter of several cross sections of the pipe section A to be measured through the scanning mechanism, obtain the length of the pipe section to be measured through the laser interferometer 2, calculate the standard volume of the pipe section A to be measured, and at the same time, the host computer 6 completes the report generation.

[0040] In this method, in step three, the inner diameter of measuring device 4 is compared with the standard value of standard ring gauge 3-2 for three inner diameters, and the calculation model is corrected to ensure the accuracy of the inner diameter of measuring device (4) within the range of three inner diameters.

[0041] In practical applications, in step five, the first drive mechanism and the second drive mechanism of the measuring device drive the measuring device 4 to move a set distance along the synchronous belt within the pipe section being measured, and the scanning mechanism measures the inner diameter of the section being measured.

[0042] Meanwhile, in this method, in step five, the attitude value is obtained through the gyroscope 4-25, the non-horizontal attitude of the measuring device 4 is adjusted by the adjustment mechanism, and the inner diameter of several measured sections is converted into the average value of the inner diameter of the measured sections by the scanning mechanism. The average value of the inner diameter of the measured sections is recorded as R, and the length of the measured pipe segment A obtained by the laser interferometer 2 is recorded as L. The volume of a cylinder is calculated using the formula V=πR. 2 L, and then calculate the standard volume of the pipe section A being tested.

[0043] In practical applications, three displacement sensors 4-20 and a scanning rotary table 4-32 are used to perform 360˚ scanning measurement of the inner diameter of the pipe section; a laser interferometer 2 is used to accurately measure any standard length of the pipe within the range of (0-80) m; and a drive mechanism and attitude adjustment mechanism consisting of a closed-loop motor, synchronous belt, reduction gear, and a closed-loop motor are used to enable the measurement system to move flexibly along the axis of the deep hole pipe and maintain a horizontal attitude.

[0044] The present invention provides a high-accuracy measurement system and method for the standard volume of deep-hole large-diameter pipe sections. The acquired signal is wirelessly transmitted to the host computer. The measurement process is fully automated. The pipe to be measured is divided into several micro-cylinders. The base area, inner diameter and height of each micro-cylinder are measured to calculate the volume of the micro-cylinder. Finally, an integral model of the standard volume of the pipe is established. This effectively solves the problem of high-accuracy, high-efficiency and non-destructive measurement of the standard volume of deep-hole large-diameter pipe sections.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-accuracy measurement system for the standard volume of a large-size deep-hole pipe section, characterized in that, include: The pipe section under test (A) is connected to a measuring body (1) and a laser interferometer (2) on both sides. The measuring body (1) includes a limiting device (3), a measuring device (4), a measuring platform (5) and a host computer (6). The measuring device (4) is installed on the limiting device (3). The limiting device (3) is installed on the measuring platform (5). The host computer (6) is installed on the measuring platform (5). The front side of the limiting device (3) is the host computer (6). There is a distance space between the laser interferometer (2) and the limiting device (3). The height of the laser interferometer (2) is aligned with the measuring device (4). The measuring device (4) is wirelessly connected to the host computer (6). The laser interferometer (2) is connected to the host computer (6) via a serial port. The measuring device (4) includes a support mechanism, a housing (4-3), a lithium battery (4-11), a control box (4-10), a first drive mechanism, a second drive mechanism, a scanning mechanism, an adjustment mechanism, a counterweight (4-12), a motor driver (4-13), and a timing belt buckle (4-31). The outer ends of both sides of the housing (4-3) are connected to the limiting device (3) via the timing belt buckle (4-31). The support mechanism is installed on the outside of the housing (4-3) and is connected to the pipe section (A) being measured. The control box (4-10) and the lithium battery (4-11) are installed inside the housing (4-3). The device includes a drive mechanism, a scanning mechanism, an adjustment mechanism, a counterweight (4-12), and a motor driver (4-13). The adjustment mechanism is located below the lithium battery (4-11), control box (4-10), counterweight (4-12), and motor driver (4-13). The control box (4-10) and counterweight (4-12) are located on both sides of the lithium battery (4-11), and the motor driver (4-13) is located on the other side of the counterweight (4-12). The other end of the motor driver (4-13) is connected to the scanning mechanism. The adjustment mechanism is connected to the first drive mechanism, and the scanning mechanism is connected to the second drive mechanism.

2. The high-accuracy measurement system for the standard volume of deep-hole large-size pipe sections according to claim 1, characterized in that, The limiting device (3) includes a frame (3-1), a standard ring gauge (3-2), an adjusting rod (3-3), and adjusting wheels (3-4). A measuring device (4) is installed inside the frame (3-1). A standard ring gauge (3-2) is installed on the right side of the frame (3-1). A timing belt buckle (4-31) is installed between the standard ring gauge (3-2) and the housing (4-3). Adjusting wheels (3-4) are installed at the four corners of the frame (3-1), and an adjusting rod (3-3) is installed at the lower end of each adjusting wheel (3-4).

3. The high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections according to claim 1, characterized in that, The adjustment mechanism includes an adjustment motor (4-7), an adjustment reducer (4-8), an adjustment encoder (4-9), a driven adjustment gear (4-24), a gyroscope (4-25), an adjustment timing belt (4-26), a driving adjustment gear (4-27), and an adjustment wheel (4-28). The control box (4-10) and the adjustment encoder (4-9) are located on opposite sides of the adjustment reducer (4-8). The adjustment motor (4-7) is located at the lower end of the adjustment encoder (4-9), and the driving adjustment gear (4-27) is located below the adjustment motor (4-7). The other side of the adjustment motor (4-7)... The first drive mechanism is connected to the side. An adjustment timing belt (4-26) is installed between the active adjustment gear (4-27) and the driven adjustment gear (4-24). An adjustment wheel (4-28) is installed below the active adjustment gear (4-27) and the driven adjustment gear (4-24). The control box (4-10), lithium battery (4-11), counterweight (4-12) and motor driver (4-13) are arranged in sequence on the adjustment timing belt (4-26). A gyroscope (4-25) is located in front of the lithium battery (4-11). The gyroscope (4-25) is mounted on the housing (4-3).

4. The high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections according to claim 3, characterized in that, The first drive mechanism includes a drive timing belt (4-4), a drive gear (4-5), a drive pulley (4-6), a drive reducer (4-29), and a drive motor (4-30). Above the drive reducer (4-29) are the adjustment motor (4-7) and the drive gear (4-5). The drive gear (4-5) meshes with the drive pulley (4-6) at the rear. The drive gear (4-5) is connected to the second drive mechanism through the drive timing belt (4-4). The drive motor (4-30) is installed on the other side of the drive reducer (4-29).

5. The high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections according to claim 1, characterized in that, The scanning mechanism includes a scanning motor (4-14), a scanning reducer (4-15), a scanning wheel mechanism, a scanning encoder (4-17), a scanning fixing plate (4-18), a mounting bracket (4-19), a displacement sensor (4-20), and a scanning rotary table (4-32). The two sides of the scanning motor (4-14) are respectively an electric driver (4-13) and a scanning reducer (4-15). The other side of the scanning reducer (4-15) is connected to the scanning gear mechanism. The other side of the scanning gear mechanism is connected to the scanning encoder (4-17) and the scanning rotary table (4-32). The scanning encoder (4-17) is located below the scanning rotary table (4-32). The other side of the scanning encoder (4-17) is connected to the scanning fixing plate (4-18). The scanning fixing plate (4-18) is mounted on the mounting bracket (4-19). Multiple displacement sensors (4-20) are mounted on the lower outer side of the mounting bracket (4-19).

6. The high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections according to claim 5, characterized in that, The scanning gear mechanism includes an active scanning gear (4-16) and a driven scanning gear (4-21). The lower side of the active scanning gear (4-16) meshes with the driven scanning gear (4-21). The two sides of the active scanning gear (4-16) are a scanning reducer (4-15) and a scanning encoder (4-17), respectively. The two sides of the driven scanning gear (4-16) are a second drive mechanism and a scanning rotary table (4-32).

7. The high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections according to claim 6, characterized in that, The second drive mechanism includes a driven drive gear (4-22) and a driven drive pulley (4-23). ​​Above the driven drive gear (4-22) is a scanning reducer (4-15). The driven drive pulley (4-23) meshes with the rear of the driven drive gear (4-22). A drive speed reduction belt (4-4) is installed on the outside of the driven drive gear (4-22).

8. The high-accuracy measurement system for the standard volume of large-size deep-hole pipe sections according to claim 1, characterized in that, The support mechanism includes a spring slider (4-1) and a support slider (4-2). Two support sliders (4-2) are installed on the lower outer sides of both ends of the housing (4-3), and spring sliders (4-1) are installed on the upper outer sides of both ends of the housing (4-3). The two support sliders (4-2) and one spring slider (4-1) are evenly installed on the housing (4-3) at a 120° angle. The lower side of the inner wall of the pipe section (A) under the support slider (4-2) is the lower side of the inner wall of the pipe section under test, and the upper side of the inner wall of the pipe section under test is the upper side of the spring slider (4-1).

9. A method of using a high-accuracy measurement system for the standard volume of a deep-hole large-size pipe section based on any one of claims 1 to 8, characterized in that, include: Step 1: Check whether the electrical connections between the various mechanisms of the laser interferometer (2) and the measuring device (4) are correct, and whether the communication function between the laser interferometer (2), the motor driver (4-13), the control box (4-10), and the host computer (6) is established; Step 2: Install the standard ring gauge (3-2) and the measuring device (4) into the limiting device (3) on the measuring platform (5), push the measuring platform (5) to one end of the pipe section (A) to be measured, adjust the height adjustment wheel (3-4) to align the limiting device (3) with the pipe section to be measured, fix it with the flange, and then adjust the laser interferometer (2) to align the measuring optical path with the moving axis of the measuring device (4); Step 3: Start the scanning mechanism of the measuring device (4) to measure the standard ring gauge (3-2), and compare the inner diameter measured by the measuring device (4) with the standard value of the standard ring gauge (3-2); Step 4: Wind the drive timing belt (4-4) into the measuring device (4), and clamp both ends of the drive timing belt (4-4) onto the timing belt buckles (4-31) at both ends of the limiting device (3) and the pipe section (A) being measured, while ensuring that the timing belt is in a straight and taut state. Step 5: Start the various mechanisms of the measuring device (4) so ​​that the measuring device (4) can start measuring in the pipe section (A) under test. The real-time attitude of the measuring device (4) is obtained and adjusted by the adjustment mechanism. The inner diameter of several sections of the pipe section (A) under test is obtained by the scanning mechanism. The length of the pipe section (A) under test is obtained by the laser interferometer (2). The standard volume of the pipe section (A) under test is calculated. At the same time, the host computer (6) completes the report generation.

10. The method of use according to claim 9, characterized in that, In step three, the inner diameter of the measuring device (4) is compared with the standard values ​​of the standard ring gauges (3-2) for the three inner diameters, and the calculation model is corrected to ensure the accuracy of the inner diameter of the measuring device (4) within the range of the three inner diameters.

11. The method of use according to claim 9, characterized in that, In step five, the first drive mechanism and the second drive mechanism of the measuring device (4) drive the measuring device (4) to move a set distance along the synchronous belt within the pipe section to be measured, and the scanning mechanism measures the inner diameter of the section to be measured.

12. The method of use according to claim 9, characterized in that, In step five, the attitude value is obtained by the gyroscope (4-25), the non-horizontal attitude of the measuring device (4) is adjusted by the adjustment mechanism, and the inner diameter of several measured sections is converted into the average value of the inner diameter of the measured sections by the scanning mechanism. The average value of the inner diameter of the measured sections is recorded as R, and the length of the measured pipe section (A) obtained by the laser interferometer (2) is recorded as L. The cylinder volume calculation formula V=πR is used. 2 L, and then calculate the standard volume of the pipe section (A) being tested.

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