Measurement method of round rod outer diameter measurement device and measurement device

Abstract

The invention provides a measuring method of a round rod outer diameter measuring device and the measuring device.The measuring device comprises a sliding plate, the first surface of the sliding plate is provided with a first slide way and a second slide way which are perpendicular to each other, and a first measuring point, a second measuring point and a third measuring point are sequentially arranged in the second slide way at intervals; each measuring point has a distance measuring function along a direction vertical to the first surface; the measuring method comprises the steps that S1, the first surface of the sliding plate is controlled to be parallel to a to-be-measured round rod, and the first surface faces the to-be-measured round rod; s2, controlling the first slide way to be parallel to the to-be-measured round rod; s3, distance measurement from each measurement point to the to-be-measured round rod is controlled, and a first distance, a second distance and a third distance are obtained respectively; s4, acquiring a first distance between the first measuring point and the second measuring point, and acquiring a second distance between the second measuring point and the third measuring point; and S5, calculating the outer diameter of the to-be-measured round rod based on the first, second and third distances and the first and second distances. According to the invention, the to-be-measured round rod can be measured at a distance, which is safer and more efficient.

Description

Technical Field

[0001] This invention belongs to the field of measurement technology, specifically relating to a measurement method and a measuring device for measuring the outer diameter of a round rod. Background Technology

[0002] In fields such as architecture, large-span spatial grid structures are often used as part of the main building structure, and these grid structures typically use round rods as structural components. When inspecting buildings, it is also necessary to measure the outer diameter of these round rods. Currently, the common method is to use an aerial work platform to lift surveyors to the location of the component for measurement; however, this high-altitude work method is costly, time-consuming, and carries significant safety risks. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a measurement method and a measurement device for measuring the outer diameter of a round rod.

[0004] This invention provides a method for measuring the outer diameter of a round rod using a measuring device, the measuring device comprising: A skateboard, wherein a first surface of the skateboard is provided with a first track and a second track that are perpendicular to each other, and a first measuring point, a second measuring point and a third measuring point are arranged sequentially at intervals in the second track, and the first measuring point, the second measuring point and the third measuring point are all capable of measuring distance along a direction perpendicular to the first surface; The measurement method includes: S1: Control the first surface of the slide plate to be parallel to the round rod to be tested, and the first surface to be facing the round rod to be tested; S2: Control the first slide rail to be parallel to the round rod to be tested; S3: Control the distance measurement from the first measurement point, the second measurement point and the third measurement point to the rod to be measured, and obtain the first distance, the second distance and the third distance respectively; S4: Obtain the first distance between the first measurement point and the second measurement point, and obtain the second distance between the second measurement point and the third measurement point; S5: Calculate the outer diameter of the rod to be measured based on the first distance, the second distance, the third distance, the first spacing, and the second spacing.

[0005] In some embodiments, the rod outer diameter measuring device further includes: The fixed base is provided with through holes; A rotating rod is rotatably inserted into the through hole of the fixed base, and the rotating rod is perpendicular to the first slide rail; The connecting column has one end connected to the rotating rod and the other end rotatably connected to the second surface of the slide plate, with the rotating axis parallel to the first slide rail and the second surface opposite to the first surface; Step S1 includes: S1-1: Obtain the angle α between the rod to be measured and the horizontal plane; S1-2: Adjust the spatial position of the outer diameter measuring device of the round rod so that the connecting column and the round rod to be measured are placed in the same plane, or so that the connecting column is parallel to the vertical plane of the round rod to be measured; S1-3: Control the rotation of the rotating rod to drive the first surface of the slide plate to rotate toward the round rod to be measured until the angle between the first slide rail and the horizontal plane is α; S1-4: Control the second measuring point to start distance measurement, rotate the slide plate until the second measuring point detects the distance information of the rod to be measured.

[0006] In some embodiments, the fixed base is provided with a scale for indicating the rotation angle along the circumference of the through hole, the rotating rod is provided with an indicator mark that cooperates with the scale for indicating the rotation angle, the initial direction of the connecting column is vertical, the indicator mark is located at the origin of the scale, and the first slide is perpendicular to the connecting column; The operation method for "rotating until the angle between the first slide and the horizontal plane is α" in steps S1-3 is as follows: Rotate the rotating rod so that the indicator mark reaches the scale corresponding to angle α.

[0007] In some embodiments, the rotating rod is arranged horizontally, and the connecting column is arranged perpendicularly to the rotating rod; The implementation method of step S1-2 includes: adjusting the spatial position of the outer diameter measuring device of the round rod so that the round rod to be measured is perpendicular to the rotating rod.

[0008] In some embodiments, the slide is equipped with a laser rangefinder, which is detachably mounted in the second slide rail to allow the laser rangefinder to switch positions between the first measurement point, the second measurement point, and the third measurement point.

[0009] In some embodiments, the laser rangefinder has a magnetic attraction mechanism, and the slide plate has at least a second slide rail that is ferromagnetic. The laser rangefinder is slidably attracted to the second slide rail by the magnetic attraction mechanism, so that the laser rangefinder can switch positions between the first measurement point, the second measurement point, and the third measurement point.

[0010] In some embodiments, the connecting column includes a first column and a second column rotatably connected along its own axis, the first column being fixedly connected to the rotating rod, and the second column being rotatably connected to the sliding plate; The first slide rail is provided with a fourth measuring point and a fifth measuring point at intervals. Both the fourth measuring point and the fifth measuring point have the function of measuring distance along a direction perpendicular to the first surface. Step S2 includes: S2-1: Obtain the fourth distance and the fifth distance measured by the fourth measurement point and the fifth measurement point; S2-2: Compare the fourth distance and the fifth distance. If the fourth distance is equal to the fifth distance, it is determined that the first slide is parallel to the test rod. If the fourth distance is greater than or less than the fifth distance, the second column is controlled to rotate relative to the first column to drive the slide plate to rotate until the fourth distance is equal to the fifth distance.

[0011] In some embodiments, the fourth measurement point and the fifth measurement point are respectively equipped with laser rangefinders, and the measuring direction of the laser rangefinders is perpendicular to the first surface.

[0012] In some embodiments, the first measurement point, the second measurement point, and the third measurement point correspond to the first positioning point, the second positioning point, and the third positioning point on the circumferential side of the round rod to be measured, respectively. Step S5 includes: The relative positions of the first positioning point, the second positioning point, and the third positioning point are determined based on the first distance, the second distance, and the third distance, as well as the first spacing and the second spacing. The diameter of the circle containing the first positioning point, the second positioning point, and the third positioning point is determined based on the relative positions. The diameter is the outer diameter of the circular rod to be measured.

[0013] The present invention also provides a measuring device for the outer diameter of a round rod, which applies the measuring method of any embodiment of the present invention.

[0014] Beneficial effects: 1. The circular rod outer diameter measuring device provided by the present invention includes a sliding plate with a first slide and a second slide. When the first slide of the sliding plate is adjusted to be parallel to the circular rod to be measured, the three points on the circular rod measured at the first, second, and third measuring points on the second slide are all located on a circle with the same cross-section of the circular rod. The unique circle and its diameter can be determined through these three points on the same circle, and this diameter is the outer diameter of the circular rod to be measured. Therefore, by using the circular rod outer diameter measuring device of the present invention to measure the outer diameter of the circular rod, the measuring personnel can perform measurements remotely from the ground without needing to approach the circular rod, reducing measurement costs and making the measurement work safer.

[0015] 2. The round rod outer diameter measuring device provided by the present invention can measure the round rod under test remotely through the sliding plate on the measuring device, without the need to lift the measuring personnel, which improves safety and reduces measurement costs. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a structural diagram of a round rod outer diameter measuring device according to an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a flowchart of a measurement method for a round rod outer diameter measuring device according to an embodiment of the present invention; Figure 4 This is a flowchart of another measurement method for a round rod outer diameter measuring device according to an embodiment of the present invention; Figure 5 This is a flowchart illustrating another measurement method of a round rod outer diameter measuring device according to an embodiment of the present invention; Figure 6 This is a flowchart of another measurement method for a round rod outer diameter measuring device according to an embodiment of the present invention.

[0018] Figure label: 1. Slide; 11. First slide; 111. Fourth measuring point; 112. Fifth measuring point; 12. Second slide; 121. First measuring point; 122. Second measuring point; 123. Third measuring point; 2. Fixed base; 21. Fixed plate; 3. Rotating rod; 4. Connecting column; 41. First column; 42. Second column; 5. Locking device; 6. Top plate; 61. Circular level; 7. Base plate; 8. Leveling screw; 9. Tripod. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The principles and features of the present invention are described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0020] A round rod outer diameter measuring device is a device used to measure the outer diameter of an object with a circular cross-section. The measurement method of the round rod outer diameter measuring device is a method of measuring the outer diameter of the object using the round rod outer diameter measuring device.

[0021] The circular rod outer diameter measuring device of the present invention can be used to measure the outer diameter of circular rods that make up a grid structure in a building, but is not limited thereto.

[0022] A round rod refers to a test object with a circular cross-section; it can be solid or hollow.

[0023] This invention provides a method for measuring the outer diameter of a round rod using a measuring device. Figure 1 This is a structural diagram of a round rod outer diameter measuring device according to an embodiment of the present invention. Figure 2 for Figure 1 Enlarged view of point A in the middle. Figure 3 This is a flowchart of a measurement method for a round rod outer diameter measuring device according to an embodiment of the present invention, as shown below. Figure 1 , Figure 2 As shown, the round rod outer diameter measuring device includes a slide plate 1. The first surface of the slide plate 1 is provided with a first slide rail 11 and a second slide rail 12 that are perpendicular to each other. The second slide rail 12 is provided with a first measuring point 111, a second measuring point 112 and a third measuring point 113 arranged sequentially at intervals. The first measuring point 111, the second measuring point 112 and the third measuring point 113 all have the function of measuring distance along a direction perpendicular to the first surface.

[0024] like Figure 3 As shown, the measurement method of the round rod outer diameter measuring device includes: S1: The first surface of the control slide is parallel to the round rod to be measured, and the first surface faces the round rod to be measured; S2: Control the first slide rail to be parallel to the rod to be measured; S3: Control the distance measurement from the first measurement point, the second measurement point and the third measurement point to the rod to be measured, and obtain the first distance, the second distance and the third distance respectively; S4: Obtain the first distance between the first measurement point and the second measurement point, and obtain the second distance between the second measurement point and the third measurement point; S5: Calculate the outer diameter of the rod to be measured based on the first distance, the second distance, the third distance, the first spacing, and the second spacing.

[0025] In an embodiment of the present invention, after the first slide rail 11 is parallel to the circular rod to be measured, the three measuring points 111, 112, and 113 in the second slide rail 12, which is perpendicular to the first slide rail 11, are all located on the same cross-section of the circular rod to be measured, along with the first measuring point 111, the second measuring point 112, and the third measuring point 113. The unique circle of this cross-section and its diameter can be determined by the first distance, the second distance, the third distance, the first spacing, and the second spacing; this diameter is the outer diameter of the circular rod to be measured.

[0026] In some embodiments of the present invention, there are various ways to enable the first measuring point 111, the second measuring point 112, and the third measuring point 113 to have the function of measuring distance along a direction perpendicular to the first surface. For example, a laser rangefinder can be set at the first measuring point 111, the second measuring point 112, and the third measuring point 113, and the measuring direction of the laser rangefinder is perpendicular to the first surface. However, this is not a limitation. Other instruments with directional ranging functions can also be used instead of the laser rangefinder.

[0027] In some embodiments of the present invention, the skateboard 1 may be made of a square board, with the first slide rail 11 and the second slide rail 12 being parallel to two adjacent sides of the square board, respectively. As one example, the square board may be a rectangular board, with the first slide rail 11 being parallel to the longer side of the rectangular board and the second slide rail 12 being parallel to the shorter side of the rectangular board.

[0028] In some embodiments of the present invention, the first slide rail 11 is disposed on the axis of symmetry of the square plate, and the second slide rail 12 is also disposed on the axis of symmetry of the square plate, with the intersection of the first slide rail 11 and the second slide rail 12 located at the center of symmetry of the square plate. With this arrangement, when the slide plate 1 (i.e., the square plate) is rotated or moved in space, the movement of the slide plate 1 is more symmetrical, which is beneficial for the slide plate 1 to be parallel to the round rod to be measured, and also for the first slide rail 11 to be parallel to the round rod to be measured.

[0029] In some embodiments of this disclosure, the distance measurement directions of the first measuring point 111, the second measuring point 112, and the third measuring point 113 are all perpendicular to the first surface. Therefore, although the first measuring point 111, the second measuring point 112, and the third measuring point 113 all measure the distance between the sliding plate 1 and the round rod to be measured, the specific points they measure are different. The first measuring point 111 corresponds to a certain point on the round rod to be measured (which can be called the first positioning point), the second measuring point 112 corresponds to another point on the round rod to be measured (which can be called the second positioning point), and the third measuring point 113 corresponds to yet another point on the round rod to be measured (which can be called the third positioning point). Because the first slide rail 11 and the second slide rail 12 are perpendicular, and the first slide rail 11 is parallel to the round rod to be measured, the second slide rail 12 is perpendicular to the round rod to be measured. The first measuring point 111, the second measuring point 112 and the third measuring point 113 set on the second slide rail 12 are located on the same cross section of the round rod to be measured. The diameter of the cross section is the outer diameter of the round rod to be measured.

[0030] In some embodiments of the present invention, such as Figure 1As shown, the round rod outer diameter measuring device also includes a fixed base 2, a rotating rod 3, and a connecting column 4. The fixed base 2 is provided with a through hole, and the rotating rod 3 is rotatably inserted into the through hole of the fixed base 2. The rotating rod 3 is perpendicular to the first slide rail 11. One end of the connecting column 4 is connected to the rotating rod 3, and the other end is rotatably connected to the second surface of the slide plate 1. The rotating axis is parallel to the first slide rail 11, and the second surface is opposite to the first surface.

[0031] Figure 4 This is a flowchart of another measurement method for a round rod outer diameter measuring device according to an embodiment of the present invention, as shown below. Figure 4 As shown, step S1 in this embodiment of the invention includes: S1-1: Obtain the angle α between the rod to be measured and the horizontal plane; S1-2: Adjust the spatial position of the round rod outer diameter measuring device so that the connecting column and the round rod to be measured are in the same plane, or so that the connecting column and the vertical plane of the round rod to be measured are parallel; S1-3: Control the rotation of the rotating rod to drive the first surface of the slide plate to rotate toward the round rod to be measured until the angle between the first slide rail and the horizontal plane is α; S1-4: Control the second measuring point to start distance measurement, rotate the slide to the second measuring point to detect the distance information of the rod to be measured.

[0032] In an embodiment of the present invention, the connecting post 4 and the round rod to be measured are placed in the same plane (or the connecting post 4 is parallel to the vertical plane where the round rod to be measured is located). Then, the rotating rod 3 is rotated so that the angle between the first slide rail 11 and the horizontal plane is α, so that the first slide rail 11 is initially parallel to the round rod to be measured. After the distance measurement of the second measuring point 112 is activated, the sliding plate 1 is rotated until the distance information of the round rod to be measured is detected, so that the first surface of the sliding plate 1 is opposite to the round rod to be measured, so that the round rod to be measured enters the measurement range of the first slide rail 11 and the second slide rail 12.

[0033] In some embodiments of the present invention, there are multiple methods for obtaining the angle α between the circular rod to be measured and the horizontal plane in step S1-1. For example, the angle α between the circular rod to be measured and the horizontal plane can be obtained from the construction drawings of the circular rod to be measured. Alternatively, the angle α between the circular rod to be measured and the horizontal plane can be obtained by visual estimation. However, the method is not limited to these methods.

[0034] In some embodiments of the present invention, steps S1-4 can be performed in various ways to determine whether the second measuring point 112 has detected the distance information of the rod to be measured. For example, based on the position of the rod to be measured, the measured distance is compared with the estimated distance range. If the measured distance matches the estimated distance range, it can be determined that the second measuring point 112 has detected the distance information of the rod to be measured. Another example is using a laser rangefinder to measure the distance at the second measuring point 112. If the laser from the laser rangefinder illuminates the rod to be measured, it can be determined that the second measuring point 112 has detected the distance information of the rod to be measured. However, this is not the only possible method.

[0035] In some embodiments of the present invention, the fixed base 2 is provided with a scale for indicating the rotation angle along the circumference of the through hole, and the rotating rod 3 is provided with an indicator mark that cooperates with the scale for indicating the rotation angle. The initial direction of the connecting column 4 is vertical, and the corresponding indicator mark is located at the origin of the scale. The first slide rail 11 is perpendicular to the connecting column 4. The operation method of "rotating until the angle between the first slide rail 11 and the horizontal plane is α" in step S1-3 is as follows: rotate the rotating rod 3 so that the indicator mark reaches the scale corresponding to angle α.

[0036] In an embodiment of the present invention, a scale is set on the fixed base 2 and an indicator mark is set on the rotating rod 3, which can accurately control the rotation angle of the connecting column 4 without the need for other measuring devices.

[0037] In some embodiments of the present invention, such as Figure 1 As shown, the outer diameter measuring device for the round rod also includes a locking element 5, which is used to lock and release the rotating rod 3 relative to the fixed base 2. After adjusting the rotating rod 3 to a suitable angle, the locking element 5 can fix the rotating rod 3 relative to the fixed base 2, eliminating the need for the measuring personnel to manually maintain the angle of the rotating rod 3. As one embodiment, the locking element 5 can be a locking nut sleeved on the rotating part. The surface of the rotating part can be provided with threads that mate with the locking nut.

[0038] In some embodiments of the present invention, the rotating rod 3 is horizontally arranged, and the connecting column 4 is vertically arranged with the rotating rod 3. The implementation method of step S1-2 includes: adjusting the spatial position of the round rod outer diameter measuring device so that the round rod to be measured is perpendicular to the rotating rod 3.

[0039] In the embodiments of this disclosure, adjusting the measuring position of the round rod outer diameter measuring device so that the horizontally set rotating rod 3 is perpendicular to the round rod to be measured can make the connecting column 4, which is perpendicular to the rotating rod 3, and the round rod to be measured in the same plane, which is beneficial to adjusting the slide plate 1 to a position parallel to the round rod to be measured.

[0040] In some embodiments of the present invention, the outer diameter measuring device for a round rod may further include a leveling mechanism. The leveling mechanism includes a base plate 7, a top plate 6, and three leveling screws 8, which are disposed between the base plate 7 and the top plate 6 and are not collinear. A circular spirit level 61 is disposed above the top plate 6. By adjusting the three leveling screws 8 in conjunction with the circular spirit level 61, the top plate 6 is adjusted to be level. The fixed base 2 is then placed on the top plate 6, making the rotating rod 3 parallel to the top plate 6, thus leveling the rotating rod 3. Of course, other structures can be used to replace the leveling screws 8, as long as they can cooperate with the circular spirit level 61 for leveling.

[0041] In some embodiments of the present invention, a leveling adjustment can be performed before adjusting the measuring position of the round rod outer diameter measuring device, and a leveling adjustment can also be performed after adjusting the measuring position of the round rod outer diameter measuring device.

[0042] In some embodiments of the present invention, the round rod outer diameter measuring device may further include a tripod 9, which is disposed below the base plate 7 to support the base plate 7. The tripod 9 can be installed in various ground environments and provides stable support, eliminating the need for those skilled in the art to hold the measuring device, thus improving the stability of the measuring device.

[0043] In some embodiments of the present invention, the slide plate 1 is provided with a laser rangefinder, which is detachably disposed in the second slide rail 12 so that the laser rangefinder can switch positions between the first measuring point 111, the second measuring point 112 and the third measuring point 113.

[0044] In an embodiment of the present invention, the laser rangefinder is detachably connected to the second slide rail 12, so that the distance measurement of the first measurement point 111, the second measurement point 112 and the third measurement point 113 can be completed using a single laser rangefinder, simplifying the structure and reducing costs.

[0045] In some embodiments of the present invention, the laser rangefinder has a magnetic attraction structure, and the slide plate 1 and at least the second slide rail 12 are ferromagnetic. The laser rangefinder is slidably attracted to the second slide rail 12 through the magnetic attraction structure, so that the laser rangefinder can switch positions between the first measurement point 111, the second measurement point 112 and the third measurement point 113.

[0046] In an embodiment of the present invention, the laser rangefinder is magnetically mounted on the second slide rail 12, allowing it to switch between the first measuring point 111, the second measuring point 112, and the third measuring point 113 without complicated disassembly and assembly procedures, making it more convenient to use.

[0047] Ferromagnetic properties are the ability of a substance to be attracted to a magnetic substance. A substance with ferromagnetism can be magnetic, such as a magnet, or it can be non-magnetic, such as iron.

[0048] In some embodiments of this disclosure, the skateboard 1 is made of a ferromagnetic material, for example, the skateboard 1 is an iron plate, but is not limited thereto.

[0049] In some embodiments of this disclosure, laser rangefinders may also be set at the first measurement point, the second measurement point, and the third measurement point to avoid the workload caused by moving the laser rangefinders.

[0050] In some embodiments of the present invention, such as Figure 1 , Figure 2 As shown, the connecting column 4 includes a first column 41 and a second column 42 that are rotatably connected along its own axis. The first column 41 is fixedly connected to the rotating rod 3, and the second column 42 is rotatably connected to the slide plate 1. A fourth measuring point 121 and a fifth measuring point 122 are provided at intervals in the first slide rail 11. Both the fourth measuring point 121 and the fifth measuring point 122 have the function of measuring distance in a direction perpendicular to the first surface.

[0051] Figure 5 This is a flowchart illustrating another measurement method of a round rod outer diameter measuring device according to an embodiment of the present invention, as shown below. Figure 5 As shown, step S2 in this embodiment of the invention includes: S2-1: Obtain the fourth and fifth distances measured at the fourth and fifth measurement points; S2-2: Compare the fourth distance and the fifth distance. If the fourth distance and the fifth distance are equal, it is determined that the first slide is parallel to the rod to be measured. If the fourth distance is greater than or less than the fifth distance, the second column is controlled to rotate relative to the first column to drive the slide to rotate until the fourth distance and the fifth distance are equal.

[0052] In an embodiment of the present invention, rotating the rotating rod 3 may not make the slide plate 1 completely parallel to the round rod to be measured, let alone make the second slide rail 12 perpendicular to the round rod to be measured. By rotating the second column 42, the distances detected by the fourth measuring point 121 and the fifth measuring point 122 of the first slide rail 11 are equal. Then the first slide rail 11 is parallel to the round rod to be measured, and the second slide rail 12, which is perpendicular to the first slide rail 11, is perpendicular to the round rod to be measured. This ensures that the positions of the first measuring point 111, the second measuring point 112, and the third measuring point 113 located on the second slide rail 12 are on the same cross-section of the round rod to be measured.

[0053] In some embodiments of the present invention, the fourth measuring point 121 and the fifth measuring point 122 are located on both sides of the second measuring point 112, respectively, for ease of operation.

[0054] In some embodiments of the present invention, the second measuring point 112 is located at the intersection of the first slide rail 11 and the second slide rail 12, so that the second measuring point 112 can be collinear with the first measuring point 111 and the third measuring point 113, and also with the fourth measuring point 121 and the fifth measuring point 122, thereby avoiding measurement inconvenience caused by the second measuring point 112 not being collinear with the fourth measuring point 121 and the fifth measuring point 122 (for example, when the rod to be measured is thin, after the second measuring point 112 is aligned with the rod to be measured, the fourth measuring point and the fifth measuring point have already deviated from their positions relative to the rod to be measured, resulting in measurement failure).

[0055] In some embodiments of the present invention, the fourth measuring point 121 and the fifth measuring point 122 are respectively provided with laser rangefinders, and the measuring direction of the laser rangefinders is perpendicular to the first surface.

[0056] In an embodiment of the present invention, when the second column 42 is rotated to adjust the slide plate 1, the fourth distance and the fifth distance are constantly changing. Laser rangefinders are set at the fourth measurement point 121 and the fifth measurement point 122 respectively. When comparing the fourth distance and the fifth distance, real-time comparison can be achieved, and the adjustment of the attitude of the slide plate 1 can be completed more quickly.

[0057] In some embodiments of the present invention, the first, second, third, fourth, and fifth measuring points can share a single detachable laser rangefinder to reduce the number of laser rangefinders used and lower costs. As one embodiment, the laser rangefinder has a magnetic structure to adhere and slide within a first and second slide rail, thereby switching positions between the first, second, third, fourth, and fifth measuring points.

[0058] In some embodiments of the present invention, the first measuring point 111, the second measuring point 112, and the third measuring point 113 correspond to the first positioning point, the second positioning point, and the third positioning point on the circumferential side of the round rod to be measured, respectively. Step S5 includes: The relative positions of the first, second, and third positioning points are determined based on the first distance, the second distance, and the third distance, as well as the first spacing and the second spacing. The diameter of the circle containing the first, second, and third positioning points is determined based on the relative positions, and this diameter is the outer diameter of the rod to be measured.

[0059] In embodiments of the present invention, the diameter of the cross-section can be determined by using a first positioning point, a second positioning point, and a third positioning point located on the same cross-section of the rod to be measured. This diameter is the outer diameter of the rod to be measured. This measurement process does not require contact with the rod to be measured, resulting in low measurement cost and high safety.

[0060] In some embodiments of the present invention, taking the calculation process of the outer diameter of a round rod to be measured as an example, the first distance is b1, the second distance is p, the third distance is b2, the first spacing is m, and the second spacing is n. A coordinate system is established with the second positioning point as the origin. The coordinates of the second positioning point are (0, 0), the coordinates of the first positioning point are (p-b1, m), and the coordinates of the third positioning point are (p-b2, -n). Based on these three coordinates, the outer diameter of the round rod to be measured can be calculated. One calculation method is as follows: The perpendicular bisector of the line connecting the first and second positioning points is: ym / 2=(b1-p) / m*[x-(p-b1) / 2] (1) The perpendicular bisector of the line connecting the second and third positioning points is: yn / 2=(p-b2) / n*[x-(p-b2) / 2] (2) Solving the system of equations (1) and (2) above, we obtain the coordinates of the center of the circle (x, y), and finally calculate the outer diameter (diameter) of the rod to be measured, d = 2 * (x, y). 2 +y 2 ) 0.5 .

[0061] In some embodiments of this disclosure, the outer diameter d of the rod to be measured can also be obtained in other ways, such as drawing a circle in drawing software (such as AutoCAD) with a first positioning point (p-b1, m), a second positioning point (0, 0) and a third positioning point (p-b2, -n), and then measuring the diameter of the circle, and taking the measured diameter as the outer diameter of the rod to be measured.

[0062] In some embodiments of this disclosure, the process of calculating the outer diameter of the round rod to be measured based on the first distance, the second distance, the third distance, the first spacing, and the second spacing can be calculated separately by the measuring personnel, or a calculation module can be set in the round rod outer diameter measuring device to perform the calculation and directly output the calculation result, i.e., the outer diameter of the round rod to be measured.

[0063] The present invention also provides a measuring device for the outer diameter of a round rod, which applies the measuring method in any embodiment of the present invention.

[0064] In an embodiment of the present invention, the diameter of the same cross-section on the rod to be measured is obtained by measuring three points on the same cross-section of the rod using the slide plate 1 of the rod outer diameter measuring device. This diameter is the outer diameter of the rod. The rod outer diameter measuring device of the present invention does not require close-range measurement, reducing the difficulty and cost of measurement and improving the safety of measurement.

[0065] In some embodiments of the present invention, the round rod outer diameter measuring device includes a tripod 9, a leveling mechanism, and a measuring mechanism. The leveling mechanism includes a top plate 6, a bottom plate 7, and leveling screws 8. The tripod 9 is positioned below the bottom plate 7 to support it. Three leveling screws 8 are positioned between the bottom plate 7 and the top plate 6, providing support to the top plate 6 from three non-collinear directions. The screws adjust the levelness of the top plate 6 by extending and retracting, working in conjunction with a circular spirit level 61 on the top plate 6 to bring it to a horizontal position. The measuring mechanism is located on the surface facing the top plate 6. The measuring mechanism includes a fixed base 2, a rotating rod 3, a connecting column 4, a locking element 5, and a sliding plate 1. The fixed base 2 includes two fixed plates 21, each with through holes. The rotating rod 3 rotatably passes through the through holes of the two fixed plates 21. The fixed plates 21 have graduations for measuring rotation angles, and the rotating rod 3 has indicators that correspond to the graduations on the fixed plates 21, indicating the rotation angle of the rotating rod 3. The through holes on the two fixed plates 21 need to be designed so that the rotating rod 3 is parallel to the top plate 6. One end of the connecting column 4 is perpendicularly connected to the rotating rod 3, and the other end is rotatably connected to the slide plate 1, with the rotation axis perpendicular to the connecting column 4. The slide plate 1 has a first slide rail 11 and a second slide rail 12 that are perpendicular to each other, and the first slide rail 11 is parallel to the rotation axis of the slide plate 1.

[0066] like Figure 1 As shown, in the initial position, the connecting column 4 is in the vertical direction, and the indicator mark on the rotating rod 3 indicates the initial scale (i.e., scale 0). The connecting column 4 includes a first column 41 and a second column 42 that are rotatably connected along their own axis. The first column 41 is connected to the rotating rod 3, and the second column 42 is rotatably connected to the sliding plate 1.

[0067] Figure 6 This is a flowchart of another measurement method for a round rod outer diameter measuring device according to an embodiment of the present invention, as shown below. Figure 6 As shown, operate this round rod outer diameter measuring device to measure the round rod to be measured in the following order: Sa-1: Adjust the measuring position of the round rod outer diameter measuring device so that the rotation axis is perpendicular to the round rod to be measured; Sa-2: Obtain the angle α between the rod to be measured and the horizontal plane, rotate the rod so that it rotates by an angle α in the direction of the rod to be measured, and use the locking device to lock the rod relative to the fixed base. Sa-3: Rotate the second cylinder until the distances measured by the fourth and fifth measuring points on both sides of the first track on the skateboard are equal; Sa-4: Obtain the first distance, second distance, and third distance measured at the first, second, and third measurement points in the second slide, respectively; Sa-5: The first distance between the first and second measuring points, the second distance between the second and third measuring points, the first distance, the second distance and the third distance, are used to calculate the outer diameter of a round rod.

[0068] Before step Sa-1, leveling can be performed using a leveling mechanism. After step Sa-1, leveling can also be performed using a leveling mechanism.

[0069] In some embodiments of the present invention, the first column 41 and the second column 42 can be rotatably connected by plugging in. For example, the first column 41 has a hole extending along its own axial direction, and the second column 42 is plugged into the hole of the first column 41.

[0070] In some embodiments of the present invention, a ratchet structure or a resilient pin structure may be provided between the first column 41 and the second column 42, so that when the second column 42 rotates relative to the first column 41, it can obtain an intermittent positioning function to provide feedback on the rotation of the second column 42. The interval of the intermittent positioning needs to be uniformly set, for example, 1°, but larger or smaller intervals can also be adopted.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

[0072] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A measuring method of a round bar outer diameter measuring device, characterized by, The round rod outer diameter measuring device includes: A skateboard, wherein a first surface of the skateboard is provided with a first track and a second track that are perpendicular to each other, and a first measuring point, a second measuring point and a third measuring point are arranged sequentially at intervals in the second track, and the first measuring point, the second measuring point and the third measuring point are all capable of measuring distance along a direction perpendicular to the first surface; The measurement method includes: S1: Control the first surface of the slide plate to be parallel to the round rod to be tested, and the first surface to be facing the round rod to be tested; S2: Control the first slide rail to be parallel to the round rod to be tested; S3: Control the distance measurement from the first measurement point, the second measurement point and the third measurement point to the rod to be measured, and obtain the first distance, the second distance and the third distance respectively; S4: Obtain the first distance between the first measurement point and the second measurement point, and obtain the second distance between the second measurement point and the third measurement point; S5: Calculate the outer diameter of the rod to be measured based on the first distance, the second distance, the third distance, the first spacing, and the second spacing.

2. The measuring method of the round bar outer diameter measuring apparatus according to claim 1, wherein The round rod outer diameter measuring device also includes: The fixed base is provided with through holes; A rotating rod is rotatably inserted into the through hole of the fixed base, and the rotating rod is perpendicular to the first slide rail; The connecting column has one end connected to the rotating rod and the other end rotatably connected to the second surface of the slide plate, with the rotating axis parallel to the first slide rail and the second surface opposite to the first surface; Step S1 includes: S1-1: Obtain the angle α between the rod to be measured and the horizontal plane; S1-2: Adjust the spatial position of the outer diameter measuring device of the round rod so that the connecting column and the round rod to be measured are placed in the same plane, or so that the connecting column is parallel to the vertical plane of the round rod to be measured; S1-3: Control the rotation of the rotating rod to drive the first surface of the slide plate to rotate toward the round rod to be measured until the angle between the first slide rail and the horizontal plane is α; S1-4: Control the second measuring point to start distance measurement, rotate the slide plate until the second measuring point detects the distance information of the rod to be measured.

3. The measuring method of the round bar outer diameter measuring apparatus according to claim 2, wherein The fixed base is provided with a scale for marking the rotation angle along the circumference of the through hole, the rotating rod is provided with an indicator mark that cooperates with the scale for marking the rotation angle, the initial direction of the connecting column is vertical, the indicator mark is located at the origin of the scale, and the first slide is perpendicular to the connecting column; The operation method for "rotating until the angle between the first slide and the horizontal plane is α" in steps S1-3 is as follows: Rotate the rotating rod so that the indicator mark reaches the scale corresponding to angle α.

4. The measuring method of the round bar outer diameter measuring apparatus according to claim 2, wherein The rotating rod is set horizontally; The implementation method of step S1-2 includes: adjusting the spatial position of the outer diameter measuring device of the round rod so that the round rod to be measured is perpendicular to the rotating rod.

5. The method of measuring a round bar outer diameter measuring apparatus according to claim 1, wherein, The slide is equipped with a laser rangefinder, which is detachably mounted in the second slide rail so that the laser rangefinder can switch positions between the first measurement point, the second measurement point, and the third measurement point.

6. The measuring method of the round bar outer diameter measuring apparatus according to claim 5, wherein The laser rangefinder has a magnetic attraction mechanism, and the slide plate has at least a second slide rail that is ferromagnetic. The laser rangefinder slides and attaches to the second slide rail through the magnetic attraction mechanism, so that the laser rangefinder can switch positions between the first measurement point, the second measurement point, and the third measurement point.

7. The measuring method of the round bar outer diameter measuring apparatus according to claim 2, wherein The connecting column includes a first column and a second column that are rotatably connected along their own axis. The first column is fixedly connected to the rotating rod, and the second column is rotatably connected to the sliding plate. The first slide rail is provided with a fourth measuring point and a fifth measuring point at intervals. Both the fourth measuring point and the fifth measuring point have the function of measuring distance along a direction perpendicular to the first surface. Step S2 includes: S2-1: Obtain the fourth distance and the fifth distance measured by the fourth measurement point and the fifth measurement point; S2-2: Compare the fourth distance and the fifth distance. If the fourth distance is equal to the fifth distance, it is determined that the first slide is parallel to the test rod. If the fourth distance is greater than or less than the fifth distance, the second column is controlled to rotate relative to the first column to drive the slide plate to rotate until the fourth distance is equal to the fifth distance.

8. The measuring method of the round bar outer diameter measuring apparatus according to claim 7, wherein The fourth and fifth measurement points are each equipped with a laser rangefinder, and the measuring direction of the laser rangefinder is perpendicular to the first surface.

9. The method of measuring a round bar outer diameter measuring apparatus according to claim 1, wherein, The first measuring point, the second measuring point, and the third measuring point correspond to the first positioning point, the second positioning point, and the third positioning point on the circumferential side of the round rod to be measured, respectively. Step S5 includes: The relative positions of the first positioning point, the second positioning point, and the third positioning point are determined based on the first distance, the second distance, and the third distance, as well as the first spacing and the second spacing. The diameter of the circle containing the first positioning point, the second positioning point, and the third positioning point is determined based on the relative positions. The diameter is the outer diameter of the circular rod to be measured.

10. A round bar outer diameter measuring device characterized by, Apply any one of the measurement methods described in claims 1-9.

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