CN108613631B - Pipe fitting measuring device and measuring method thereof - Google Patents
Pipe fitting measuring device and measuring method thereof Download PDFInfo
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- CN108613631B CN108613631B CN201710537517.8A CN201710537517A CN108613631B CN 108613631 B CN108613631 B CN 108613631B CN 201710537517 A CN201710537517 A CN 201710537517A CN 108613631 B CN108613631 B CN 108613631B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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Abstract
A pipe fitting measuring device and a measuring method thereof are provided, the pipe fitting measuring device comprises a frame body, the frame body comprises a fixing part, and the fixing part is used for fixing a pipe fitting to be measured; the frame body and the movable seat are arranged in a first direction, the movable seat comprises a rotating disc, the rotating disc can move in the first direction and a second direction respectively, the rotating disc can rotate by taking a rotating shaft as an axis, the rotating shaft is parallel to a third direction, and the first direction, the second direction and the third direction are mutually vertical; the positioning device can move along the third direction, a connecting line of two ends of the positioning device is a first axis, and the projection of the first axis on the rotating disk is overlapped with one radial direction of the rotating disk; and the scanning device is combined with the rotating disk, a connecting line of two ends of the scanning device is a second axis, and the projection of the second axis on the rotating disk is overlapped with the other radial direction of the rotating disk.
Description
Technical Field
The invention relates to a pipe fitting measuring device and a measuring method thereof, in particular to a pipe fitting measuring device capable of measuring characteristics of the inner peripheral wall of a pipe fitting and a measuring method thereof.
Background
Referring to fig. 1, a conventional pipe 9 is shown, and the pipe 9 may be a closed pipe with an opening 91 at one end, or a connected pipe with openings 91 at both ends. The inner circumferential wall of the tube 9 may be provided with a feature 92, and the feature 92 may be a groove (e.g., a circular groove), a flange (e.g., a circular flange), or other special configuration formed on the inner circumferential wall.
Generally, when it is desired to detect whether the manufacturing accuracy of the pipe 9 meets the specification, a measuring device can be used to perform an appearance inspection on the pipe 9, for example, taiwan patent No. M404369 discloses a pipe diameter measuring apparatus capable of measuring the pipe diameter by external observation of the pipe. However, the associated measuring device is unable to detect whether the feature 92 inside the tube 9 complies with the predetermined specification.
On the other hand, the conventional inspection apparatus capable of inspecting the inside of the tube 9 is mainly a contact type scanning device, and a probe is inserted into the inside of the tube 9 and abuts against the inner peripheral wall thereof to scan the feature portion 92 in a reciprocating manner, so as to determine whether the feature portion 92 conforms to a predetermined specification. However, if the material of the tube 9 is weak, there is a risk of damage to the probe. Moreover, for the pipe 9 with a smaller diameter, the probe is easily limited in size and cannot extend into the pipe 9, or cannot freely move inside the pipe 9, so that the application range of the contact scanning device is smaller. In addition, the related contact scanning device often needs to integrate an auxiliary mechanical arm and a high-resolution probe, which easily causes the system equipment to be bulky and expensive.
In view of the above, it is necessary to provide a further improved pipe measuring device and a measuring method thereof to solve the problem that the existing pipe 9 with the feature 92 inside lacks a suitable measuring device.
Disclosure of Invention
In order to solve the above problems, the present invention provides a pipe measuring device and a measuring method thereof, wherein a movable seat, a positioning device and a scanning device are provided, and the scanning device can be positioned by using the movable seat and the positioning device, so that the scanning device can perform projection measurement on the inner peripheral wall of a pipe to be measured.
In order to achieve the above purpose, the technical solution of the present invention comprises:
a pipe measurement apparatus, comprising: the frame body comprises a fixing part for fixing a pipe fitting to be measured; the frame body and the movable seat are arranged in a first direction, the movable seat comprises a first slide rail, a second slide rail, a rotating disc and a third slide rail, the second slide rail is movably combined with the first slide rail, the rotating disc is movably combined with the second slide rail, the first slide rail and the second slide rail respectively extend along the first direction and a second direction perpendicular to the first direction, the rotating disc can rotate by taking a rotating shaft as an axis, the rotating shaft is parallel to a third direction, the third direction is perpendicular to the first direction and the second direction, the rotating disc is combined with the third slide rail, and the third slide rail extends along the third direction; the positioning device is movably combined with the third slide rail, a connecting line of two ends of the positioning device is a first axis, the projection of the first axis on the rotating disk is overlapped with one radial direction of the rotating disk, and the positioning device is provided with a positioning end part; and the scanning device is combined with the rotating disk, a connecting line of two ends of the scanning device is a second axis, the projection of the second axis on the rotating disk is overlapped with the other radial direction of the rotating disk, and the scanning device is provided with an image capturing end part.
The positioning device comprises a third slide rail, a positioning device and a third slide rail, wherein the two ends of the positioning device are respectively a combination end part and the positioning end part, the combination end part is directly or indirectly combined with the third slide rail, and a connecting line of the combination end part and the positioning end part is the first axis; the two ends of the scanning device are respectively a fixed end part and the image capturing end part, the fixed end part is combined with the rotating disc, and the connecting line of the image capturing end part and the fixed end part is the second axis. Therefore, the projections of the first axis of the positioning device and the second axis of the scanning device on the rotating disc are respectively overlapped with the two radial directions of the rotating disc, so that if the first axis is overlapped with the central shaft of the pipe to be measured in the third direction, the rotating disc is rotated to enable the projection of the second axis on the rotating disc to be parallel to the first direction, and then the second axis is also overlapped with the central shaft of the pipe to be measured in the third direction.
Wherein, the positioning device is provided with a convex column at the positioning end part, and the convex column extends along the third direction. Therefore, the convex column can abut against the inner peripheral wall of the pipe fitting to be measured along the third direction, and the end edge can be positioned by the positioning end part by respectively moving the rotating disc and the positioning device back and forth along the second direction and the third direction.
The scanning device is provided with a height adjusting part which is combined with the fixed end part of the scanning device so as to adjust the scanning device to a proper position through the height adjusting part, so that the distance between the image capturing end part of the scanning device and the inner peripheral wall of the pipe fitting to be measured is prevented from being too close or too far, the scanning device can carry out projection measurement on the inner peripheral wall of the pipe fitting to be measured, or the pipe fitting measuring device can be suitable for pipe fittings to be measured with different sizes.
Wherein, the rotating disc is provided with a motor which is a stepping motor. Therefore, when the rotating disc needs to rotate by an included angle by taking the rotating shaft as an axis, the rotating angle of the rotating disc can be controlled by the motor to finish the action, and the pipe fitting measuring device has the effect of improving the use convenience.
The rotating disc can rotate along a first rotating direction, so that the first stop block is abutted against the stop block; the rotating disc can rotate along a second rotating direction opposite to the first rotating direction, so that the second stop block abuts against the stop block. Therefore, the rotating disc does not need to be driven by a stepping motor, and can still rotate an included angle to the rotating shaft, so that the pipe fitting measuring device has the effect of further reducing the equipment cost.
The fixing part is a bottom plate, the fixing part is provided with a groove, and the groove extends along the first direction. Therefore, the pipe to be measured can be contained in the groove to be supported by the fixing part, and the surface of the fixing part facing the groove can effectively fix the pipe to be measured so as to prevent the pipe to be measured from generating displacement.
The rotating disc is provided with a locking assembly, and the locking assembly can be abutted against the second slide rail so as to fix the rotating disc on the second slide rail, so that the rotating disc is prevented from moving along the second direction, and the position of the rotating disc in the second direction is further fixed.
The projection of the first axis and the second axis on the rotating disc has an included angle of 180 degrees, so that the projection of the first axis and the second axis on the rotating disc forms a coaxial line.
A tubular measurement method, executable by a tubular measurement apparatus as described above, comprising: fixing a pipe to be measured on the fixing part of the frame body, so that a central axis of the pipe to be measured is parallel to the first direction; rotating the rotating disc to enable the positioning end part of the positioning device to face an opening of the pipe fitting to be measured, and enabling the projection of the first axis to the rotating disc to be parallel to the first direction; moving the rotating disc towards the pipe to be measured along the first direction, so that the positioning end part of the positioning device extends into the pipe to be measured through the opening; positioning an end edge of the inner peripheral wall of the pipe to be measured in the third direction by using the positioning end part, and fixing the position of the rotating disc in the second direction; moving the rotating disc along the first direction in a direction away from the pipe to be measured, so that the positioning end part of the positioning device is separated from the pipe to be measured; rotating the rotating disc to make the image capturing end of the scanning device face the opening of the pipe to be measured and make the projection of the second axis on the rotating disc parallel to the first direction; and moving the rotating disc towards the pipe fitting to be measured along the first direction, so that the image capturing end part of the scanning device extends into the pipe fitting to be measured through the opening, and the scanning device performs projection measurement on the inner peripheral wall of the pipe fitting to be measured.
The positioning of the end edge of the pipe to be measured by the positioning end part comprises reciprocating the rotating disc along the second direction and reciprocating the positioning device along the third direction, so that the end edge of the inner peripheral wall of the pipe to be measured in the third direction is positioned by the positioning end part.
The first axis and the second axis have an included angle in the projection of the rotating disc, and rotating the rotating disc to enable the image capturing end of the scanning device to face the opening of the pipe to be measured comprises rotating the rotating disc by the included angle with the rotating shaft as an axis, so that the projection of the second axis on the rotating disc is parallel to the first direction.
The method comprises the steps that the rotating disc is moved towards the pipe to be measured along the first direction to enable the image taking end of the scanning device to extend into the pipe to be measured through the opening, the moving amount of the rotating disc along the first direction is controlled, the image taking end is opposite to the characteristic portion, and therefore the scanning device can generate an image comprising the characteristic portion.
The projection measurement of the inner peripheral wall of the pipe to be measured by the scanning device comprises outputting light rays covering the characteristic part along an axis, wherein the axis is parallel to the third direction and passes through the central axis of the pipe to be measured, and the light rays reflected by the inner peripheral wall of the pipe to be measured are received. Therefore, the image finally generated by the scanning device can comprise the characteristic part, and the image takes the end edge of the inner peripheral wall of the pipe to be measured in the third direction as the center, so that whether the characteristic part conforms to the preset specification or not can be judged according to the image.
Through the structure, the pipe fitting measuring device and the measuring method thereof provided by the invention have the advantages that the scanning device can perform projection measurement on the inner peripheral wall of the pipe fitting to be measured along the axis, the projection measurement can be completed only through image acquisition and analysis, the pipe fitting to be measured cannot be damaged, and the pipe fitting measuring practicability is improved. Moreover, for the pipe fitting to be measured with a smaller caliber, the scanning device with the smaller-size image capturing end part can be used for ensuring smooth measurement, and the pipe fitting measuring device has the effect of improving the application range. In addition, the pipe fitting measuring device is only composed of the frame body, the movable seat capable of moving linearly and the positioning device matched with the scanning device, so that the structural complexity of the whole pipe fitting measuring device is effectively reduced, and the pipe fitting measuring device has the effects of reducing the volume of equipment and reducing the cost of the equipment.
Drawings
FIG. 1: a partial cross-sectional view of an existing pipe.
FIG. 2: the appearance schematic diagram of the pipe fitting measuring device provided by the embodiment of the invention.
FIG. 3: the appearance of the pipe fitting measuring device provided by the embodiment of the invention is enlarged schematically.
FIG. 4: the pipe fitting measuring device provided by the embodiment of the invention is a schematic top view.
FIG. 5: the pipe fitting measuring device of the embodiment of the invention is a schematic partial sectional view.
FIG. 6: the action schematic diagram of the pipe fitting measuring device of the embodiment of the invention when the positioning device extends into the pipe fitting to be measured.
FIG. 7: the pipe fitting measuring device provided by the embodiment of the invention has the action schematic diagram that the positioning end part of the positioning device is abutted to the pipe fitting to be measured.
FIG. 8: the pipe fitting measuring device provided by the embodiment of the invention is a schematic state diagram of a positioning end part of a positioning device far away from an end edge of a pipe fitting to be measured.
FIG. 9: the pipe fitting measuring device provided by the embodiment of the invention is a state schematic diagram in which the positioning end part of the positioning device is positioned at the end edge of the pipe fitting to be measured.
FIG. 10: the rotating disk of the pipe fitting measuring device provided by the embodiment of the invention is rotated by an included angle.
FIG. 11: the partial sectional view of the rotating disk of the pipe fitting measuring device of the embodiment of the invention after being rotated by an included angle is schematic.
FIG. 12: the scanning device of the pipe fitting measuring device provided by the embodiment of the invention is a schematic action diagram when extending into the pipe fitting to be measured.
FIG. 13: the pipe fitting measuring device provided by the embodiment of the invention is an action schematic diagram for performing projection measurement on the inner peripheral wall of a pipe fitting to be measured.
FIG. 14: the appearance of the movable seat of the pipe fitting measuring device provided by the embodiment of the invention is enlarged schematically.
Description of the reference numerals
[ present invention ]
1 frame body
11 fixed part 111 groove
112 position limiting piece
2 Movable seat
21 first slide rail 22 second slide rail
23 rotating disk 231 locking assembly
232 motor 233 first stop
234 second stop 24 third slide rail
25 stop
3 positioning device
31 first axis 32 projection
4 scanning device
4a fixed end 4b imaging end
41 second axis 42 light inlet and outlet
43 height adjusting part
X first direction Y second direction
Z third direction theta angle
S-shaped rotating shaft
9 opening of pipe 91 to be measured
92 feature 93 end edge
C center axis C1 axis line
[ Prior Art ]
9 pipe fitting
91 opening 92 features.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail as follows:
referring to fig. 2 and 3, a pipe measuring device according to an embodiment of the present invention includes a frame 1, a movable base 2, a positioning device 3 and a scanning device 4, wherein the frame 1 and the movable base 2 are arranged along a first direction X, and the positioning device 3 and the scanning device 4 are respectively coupled to the movable base 2.
The frame body 1 includes a fixing portion 11, and the fixing portion 11 is used for fixing a pipe 9 to be measured. For example, in the embodiment, the fixing portion 11 is a bottom plate, the fixing portion 11 is provided with a groove 111, the groove 111 extends along the first direction X, and the groove 111 may form a wedge-shaped groove. Therefore, the pipe 9 to be measured can be accommodated in the groove 111 to be supported by the fixing portion 11. In addition, the fixing portion 11 can further be combined with a limiting member 112, and the limiting member 112 abuts against the pipe 9 to be measured, so as to firmly clamp and fix the pipe 9 to be measured in the groove 111, thereby preventing the pipe 9 to be measured from generating displacement. However, in some embodiments of the present invention, the fixing portion 11 may be a fixing structure in other forms such as a bracket, a clamp, a suspension device, and the like, and the present invention is not limited thereto.
The movable seat 2 includes a first slide rail 21, a second slide rail 22, a rotating disc 23 and a third slide rail 24, the second slide rail 22 is movably combined with the first slide rail 21, and the rotating disc 23 is movably combined with the second slide rail 22. The first slide rail 21 and the second slide rail 22 respectively extend along the first direction X and a second direction Y perpendicular to the first direction X. For example, in the present embodiment, the first slide rail 21 extends along the first direction X, and the second slide rail 22 extends along the second direction Y. Therefore, the second slide rail 22 can move along the first direction X relative to the first slide rail 21, and the rotating disc 23 can move along the second direction Y relative to the second slide rail 22, so that the rotating disc 23 can substantially move in the first direction X and the second direction Y, respectively. However, in some embodiments of the present invention, the first slide rail 21 may extend along the second direction Y, and the second slide rail 22 extends along the first direction X, so that the rotating disc 23 can move along the first direction X and the second direction Y, respectively, and the present invention is not limited thereto.
The rotating disc 23 is located on a plane formed by the first direction X and the second direction Y, and the rotating disc 23 can rotate around a rotating shaft S as an axis, where the rotating shaft S is parallel to a third direction Z perpendicular to the first direction X and the second direction Y, respectively. The rotating disc 23 is combined with the third sliding track 24, and the third sliding track 24 extends along the third direction Z.
The positioning device 3 is movably combined with the third slide rail 24. Thereby, the positioning device 3 can move along the third direction Z relative to the third slide rail 24. The two ends of the positioning device 3 are respectively a combination end portion 3a and a positioning end portion 3b, the combination end portion 3a is directly or indirectly combined with the third slide rail 24, a connecting line of the combination end portion 3a and the positioning end portion 3b is a first axis 31, and a projection of the first axis 31 on the rotating disc 23 is overlapped with a radial direction of the rotating disc 23; in other words, the projection of the first axis 31 on the rotating disc 23 can extend through the rotation axis S.
The scanning device 4 is coupled to the rotating disk 23. The two ends of the scanning device 4 are respectively a fixed end 4a and an image capturing end 4b, the fixed end 4a is combined with the rotating disc 23, a connecting line between the image capturing end 4b and the fixed end 4a is a second axis 41, and a projection of the second axis 41 on the rotating disc 23 is overlapped with the other radial direction of the rotating disc 23; in other words, the projection of the second axis 41 on the rotating disc 23 can also extend through the rotation axis S. The scanning device 4 can guide light generated by a light source (e.g., a laser light source) out of the image capturing end 4b to irradiate an object to be measured (e.g., the tube 9 to be measured), and then the image capturing end 4b receives the light reflected by the object to be measured to perform projection measurement on the object to be measured. An embodiment of the scanning device 4 is disclosed in taiwan patent application No. 201544067.
Referring to fig. 4, the first axis 31 and the second axis 41 have an included angle θ in the projection of the rotating disc 23. In the present embodiment, the angle θ may be 180 °. Therefore, the projections of the first axis 31 and the second axis 41 on the rotating disc 23 form a coaxial line. However, the present invention is not limited thereto, and the included angle θ only needs to be larger than a predetermined angle so that the positioning device 3 and the scanning device 4 do not interfere with each other, i.e. the operation of the tube measuring device of the embodiment of the present invention is not affected.
Referring to fig. 2 and 5, firstly, a pipe 9 to be measured is fixed to the fixing portion 11 of the frame 1, such that a central axis C of the pipe 9 to be measured is parallel to the first direction X. Wherein, this volume of awaiting measuring pipe fitting 9 can be for only one end is equipped with the open-ended sealed body, perhaps for both ends all are equipped with the open-ended intercommunication body. The frame body 1 and the first slide rails 21 of the movable base 2 are arranged along the first direction X, so that an opening 91 of the pipe 9 to be measured can face the movable base 2 along the first direction X. The rotating disc 23 can rotate around the rotating shaft S, and a projection of the first axis 31 of the positioning device 3 on the rotating disc 23 overlaps with a radial direction of the rotating disc 23, so that by rotating the rotating disc 23, the positioning end 3b of the positioning device 3 faces the opening 91 of the pipe 9 to be measured, and the projection of the first axis 31 on the rotating disc 23 is parallel to the first direction X.
Referring to fig. 6, the rotating disc 23 is moved toward the pipe 9 to be measured along the first direction X, so that the positioning end 3b of the positioning device 3 extends into the pipe 9 to be measured through the opening 91. Referring to fig. 7, 8 and 9, by moving the positioning device 3 back and forth along the second direction Y and the third direction Z by the rotating disc 23, an end edge 93 of the inner peripheral wall of the pipe 9 to be measured in the third direction Z can be positioned by the positioning end portion 3 b. In detail, for convenience of illustration, the third direction Z may be a plumb direction, so the end edge 93 may be a bottom edge of the inner peripheral wall of the pipe 9 to be measured, but the invention is not limited thereto, in this embodiment, the positioning device 3 may be provided with a convex pillar 32 at the positioning end portion 3b, and the convex pillar 32 may extend downward along the third direction Z. As shown in fig. 8, the positioning device 3 can be moved downward along the third direction Z to make the convex column 32 abut against the inner peripheral wall of the pipe 9 to be measured, and then the rotating disc 23 is moved back and forth along the second direction Y, which means that the positioning end 3b is far away from the end edge 93 of the pipe 9 to be measured when the positioning device 3 is forced to move upward; on the contrary, if the positioning device 3 needs to move downwards, the convex column 32 can be kept abutting against the inner peripheral wall of the pipe 9 to be measured, which means that the positioning end 3b is approaching the end edge 93 when moving towards the direction. Accordingly, as shown in fig. 9, the edge 93 can be positioned by the positioning end 3b by reciprocating the rotary disk 23 and the positioning device 3 in the second direction Y and the third direction Z, respectively.
After the positioning end portion 3b is used to position the end edge 93 of the tube 9 to be measured in the third direction Z, the position of the rotating disc 23 in the second direction Y is fixed. For example, referring to fig. 2, in the present embodiment, the rotating disc 23 may be provided with a locking component 231, and the locking component 231 may abut against the second slide rail 22, so that the rotating disc 23 may be fixed to the second slide rail 22 by the locking component 231, so as to prevent the rotating disc 23 from moving along the second direction Y, and further fix the position of the rotating disc 23 in the second direction Y. The rotating disc 23 is moved in the first direction X away from the pipe 9 to be measured, so that the positioning end 3b of the positioning device 3 is separated from the pipe 9 to be measured. Referring to fig. 10 and 11, it is known that the first axis 31 of the positioning device 3 and the second axis 41 of the scanning device 4 are projected on the rotating disc 23 and respectively overlapped with two radial directions of the rotating disc 23, and the first axis 31 and the second axis 41 have the included angle θ on the projection of the rotating disc 23, so that the rotating disc 23 is rotated by the included angle θ by taking the rotating shaft S as an axis, that is, the image capturing end 4b of the scanning device 4 faces the opening 91 of the tube 9 to be measured, and the projection of the second axis 41 on the rotating disc 23 is parallel to the first direction X.
Referring to fig. 12, the rotating disc 23 is moved toward the pipe 9 to be measured along the first direction X, so that the image capturing end 4b of the scanning device 4 extends into the pipe 9 to be measured through the opening 91. The moving amount of the rotating disc 23 along the first direction X is controlled to adjust the depth of the image capturing end portion 4b extending into the pipe 9 to be measured, so that the image capturing end portion 4b can be aligned to the feature portion 92 on the inner peripheral wall of the pipe 9 to be measured. In this embodiment, the scanning device 4 may be provided with an optical inlet and outlet 42 at the image capturing end 4b, and the optical inlet and outlet 42 may be used for guiding light to irradiate the inner peripheral wall of the tube 9 to be measured and receive light reflected by the inner peripheral wall of the tube 9 to be measured.
It should be noted that, in the step of positioning the end edge 93 of the tube 9 to be measured in the third direction Z by using the positioning end portion 3b of the positioning device 3, the positioning end portion 3b is positioned at the end edge 93, and the projection of the first axis 31 on the rotating disc 23 is parallel to the first direction X; in other words, the first axis 31 of the positioning device 3 will overlap the central axis C of the pipe 9 to be measured in the third direction Z. Since the position of the rotating disc 23 in the second direction Y is fixed, the rotating disc 23 is rotated by the included angle θ with the rotating shaft S as an axis, so that after the projection of the second axis 41 of the scanning device 4 on the rotating disc 23 is parallel to the first direction X, the second axis 41 will also overlap with the central axis C of the pipe 9 to be measured in the third direction Z. Accordingly, referring to fig. 13, the scanning device can perform projection measurement on the inner peripheral wall of the tube 9 to be measured along an axis C1, where the axis C1 is parallel to the third direction Z and passes through the central axis C of the tube 9 to be measured. In detail, the scanning device 4 outputs light from the light inlet and outlet 42 of the image capturing end 4b, the light covers the features 92 on the inner peripheral wall of the tube 9 to be measured, and receives the light reflected by the inner peripheral wall of the tube 9 to be measured.
More specifically, the scanning device 4 can output a linear laser beam from the light inlet/outlet 42 of the image capturing end 4b, the linear laser beam can scan and cover the feature 92 on the inner peripheral wall of the tube 9 to be measured, and the linear laser beam can be symmetrical with respect to the axis C1. After the scanning device 4 receives the light reflected by the inner peripheral wall of the pipe 9 to be measured through the light inlet/outlet 42, the intensity of the reflected light can be sensed through a photosensitive assembly (not shown), and a depth information image or a distance image of the inner peripheral wall of the pipe 9 to be measured of the object to be measured is captured through an arithmetic unit (not shown). Accordingly, the scanning device 4 can perform projection measurement on the inner peripheral wall of the pipe 9 to be measured along the axial line C1. The photosensitive Device may be a Charge Coupled Device (CCD) camera or a Complementary Metal-Oxide Semiconductor (CMOS) camera. The computing unit can analyze the light intensity characteristic point (i.e. the position where the light is brightest, usually the brightest pixel position of each row or each column, and can be interpolated to the sub-pixels) in the picture shot by the photosensitive element, and the light intensity characteristic point can calculate the position relationship between one light in the space and the scanning device 4 after the trigonometric geometric operation (or the pre-corrected image data). In addition, in the embodiment, the light passing through the light inlet/outlet 42 can be laser light, and the value of the laser light intensity characteristic point is extracted and the compensation calculation of the filtering internal difference value is performed at the laser light intensity characteristic point by using a Remez FIR filter finite impulse response filtering method and a zero-point calculation method (zero-crossing point) proposed by Forest, so that the resolution of projection measurement can be effectively improved.
The image finally generated by the scanning device 4 includes the feature 92, so that it can be determined whether the feature 92 conforms to a predetermined specification according to the image. For example, in the embodiment, the feature 92 may be a circular groove, so that the image generated by the scanning device 4 can analyze whether parameters such as the width, depth, and edge leveling degree of the circular groove meet predetermined specifications, so as to detect whether the manufacturing precision of the tube 9 meets the specifications, or to determine whether the tube 9 to be measured is good.
Therefore, compared with the method for detecting the risk of damaging the pipe 9 by using a contact probe of the existing contact type scanning device in the pipe 9, the pipe measuring device and the scanning device 4 of the measuring method of the pipe measuring device of the embodiment of the invention do not need to contact the pipe 9 to be measured, and the projection measurement can be performed on the characteristic part 92 on the inner peripheral wall of the pipe 9 to be measured only by image acquisition and analysis, so that the pipe 9 to be measured is not damaged, and the method has the efficacy of improving the measurement practicability of the pipe 9.
In addition, the tube measuring device and the measuring method thereof according to the embodiment of the present invention only need to extend the image capturing end 4b of the scanning device 4 into the tube 9 to be measured to perform the projection measurement, and the image capturing end 4b only needs to be provided with the light inlet/outlet 42 and the simple structure such as the reflector for changing the light path, so that the scanning device 4 having the image capturing end 4b with a smaller size can be used to ensure the smooth measurement of the tube 9 to be measured with a smaller diameter. Compared with the conventional contact type scanning equipment in which the probe is easily limited by the size and cannot extend into the pipe 9, the contact type scanning equipment has the effect of improving the application range of the pipe measuring device.
In addition, compared with the conventional contact type scanning equipment which needs to integrate an auxiliary mechanical arm and a high-resolution probe, the pipe fitting measuring device provided by the embodiment of the invention is only composed of the movable seat 2 and the scanning device 4, can effectively reduce the overall structural complexity of the pipe fitting measuring device, and has the effects of reducing the equipment volume and reducing the equipment cost.
Based on the above technical concept, the following describes the features of the pipe measuring device and the measuring method thereof according to the embodiments of the present invention:
referring to fig. 2 and fig. 3, in the present embodiment, the first slide rail 21, the second slide rail 22 and the third slide rail 24 of the movable seat 2 may be of a rail structure, such that the second slide rail 22 can linearly move along the first direction X relative to the first slide rail 21, the rotating disc 23 can linearly move along the second direction Y relative to the second slide rail 22, and the positioning device 3 can linearly move along the third direction Z relative to the third slide rail 24.
The present invention is not limited to the mechanism for driving the second slide rail 22 to move relative to the first slide rail 21, the rotating disc 23 to move relative to the second slide rail 22, or the positioning device 3 to move relative to the third slide rail 24. However, for the same type of pipe 9 to be measured, the depth of the image capturing end portion 4b required to extend into the pipe 9 to be measured is usually a certain value; in other words, the moving amount of the rotating disc 23 along the first direction X when detecting each tube 9 to be measured can be fixed, so in some embodiments of the present invention, the second slide rail 22 can be moved relative to the first slide rail 21 by an aerostatic transmission mechanism, and the aerostatic transmission mechanism has the characteristics of high repeatability, fast positioning, and the like, which can improve the detection efficiency of the tube measuring apparatus and the measuring method thereof in embodiments of the present invention.
As shown in fig. 7, 8 and 9, as mentioned above, in the present embodiment, the convex pillar 32 disposed at the positioning end portion 3b of the positioning device 3 can extend downward along the third direction Z, so that the convex pillar 32 can abut against the inner peripheral wall of the pipe 9 to be measured by moving the positioning device 3 downward along the third direction Z; however, it is also possible to design the convex pillar 32 to extend upwards along the third direction Z, so that by moving the positioning device 3 upwards along the third direction Z, the convex pillar 32 can also abut against the inner peripheral wall of the pipe 9 to be measured. Alternatively, in some embodiments of the present invention, the positioning end 3b may not need to be provided with the convex pillar 32, and the positioning device 3 may be inclined downward or upward from the combining end 3a toward the positioning end 3b, so that the positioning end 3b can still abut against the inner peripheral wall of the pipe to be measured 9 by moving the positioning device 3 downward or upward along the third direction Z.
Referring to fig. 11, in the present embodiment, the scanning device 4 may further include a height adjustment portion 43, and the height adjustment portion 43 may be combined with the fixed end portion 4a of the scanning device 4. Therefore, the height adjusting portion 43 can adjust the distance between the fixed end portion 4a and the rotating disc 23 in the third direction Z. Therefore, referring to fig. 12, if the distance between the image capturing end 4b of the scanning device 4 and the inner peripheral wall of the pipe 9 to be measured is too close or too far, the scanning device 4 can be adjusted to a proper position by the height adjusting portion 43, so as to ensure that the scanning device 4 can perform projection measurement on the inner peripheral wall of the pipe 9 to be measured. In addition, the height adjusting portion 43 also allows a user to adjust the position of the scanning device 4 corresponding to pipes 9 to be measured with different sizes, so as to ensure that the pipe measuring device of the embodiment of the present invention can be applied to pipes 9 to be measured with different sizes.
In this embodiment, the rotating disc 23 may be provided with a motor 232, so as to be driven by the motor 232 to rotate around the rotating shaft S. The motor 232 may be a step motor or other rotation driving structure with a controllable rotation angle, so that when the rotating disc 23 needs to rotate the included angle θ around the rotation axis S, the rotation angle of the rotating disc 23 can be controlled by the motor 232 to complete the operation, thereby improving the convenience of the tube measuring device of the embodiment of the present invention.
Alternatively, referring to fig. 14, in some embodiments of the present invention, the rotating disc 23 is not provided with a rotation driving structure, or the rotation driving structure cannot precisely control the rotation angle, so that the movable seat 2 may be provided with a stop member 25, and the rotating disc 23 may also be provided with a first stop 233 and a second stop 234. The rotating disc 23 can rotate along a first rotating direction (e.g., clockwise direction), so that the first stopper 233 abuts against the stopper 25, and the projection of the first axis 31 of the positioning device 3 on the rotating disc 23 is parallel to the first direction X; correspondingly, the rotating disc 23 can rotate in a second rotation direction (e.g., counterclockwise) opposite to the first rotation direction, so that the second stopper 234 abuts against the stopper 25, and the projection of the second axis 41 of the scanning device 4 on the rotating disc 23 is parallel to the first direction X. Accordingly, the rotating disc 23 can still rotate the included angle θ to the rotating shaft S without being driven by a stepping motor, and the apparatus cost of the pipe measuring apparatus of the embodiment of the present invention can be further reduced.
In summary, in the tube measuring device and the tube measuring method according to the embodiments of the present invention, by providing the movable seat 2, the positioning device 3 and the scanning device 4, the movable seat 2 and the positioning device 3 can be used to position the scanning device 4, so that the scanning device 4 can perform projection measurement on the inner peripheral wall of the tube 9 to be measured along the axis C1, the projection measurement can be completed only by image capturing and analysis, the tube 9 to be measured cannot be damaged, and the tube 9 measuring method and the measuring device have an efficacy of improving the measurement practicability of the tube 9.
In addition, the pipe measuring device and the pipe measuring method of the embodiment of the invention can perform projection measurement only by extending the image capturing end portion 4b of the scanning device 4 into the pipe 9 to be measured, so that for the pipe 9 to be measured with a smaller caliber, the scanning device 4 with the image capturing end portion 4b with a smaller size can be used to ensure smooth measurement, and the pipe measuring device has the efficacy of improving the application range. In addition, the pipe measuring device of the embodiment of the invention is only composed of the frame body 1, the movable seat 2 capable of moving linearly and the positioning device 3 in cooperation with the scanning device 4, so that the structural complexity of the whole pipe measuring device can be effectively reduced, and the pipe measuring device has the effects of reducing the equipment volume and reducing the equipment cost.
Although the present invention has been disclosed with reference to the above preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (14)
1. A pipe measuring device, comprising:
the rack body comprises a fixing part for fixing a pipe fitting to be measured;
the movable seat comprises a first slide rail, a second slide rail, a rotating disc and a third slide rail, the second slide rail is movably combined with the first slide rail, the rotating disc is movably combined with the second slide rail, the first slide rail and the second slide rail respectively extend along the first direction and a second direction perpendicular to the first direction, the rotating disc can rotate by taking a rotating shaft as an axis, the rotating shaft is parallel to a third direction, the third direction is perpendicular to the first direction and the second direction, the rotating disc is combined with the third slide rail, and the third slide rail extends along the third direction;
the positioning device is movably combined with the third slide rail, a connecting line of two ends of the positioning device is a first axis, the projection of the first axis on the rotating disk is overlapped with one radial direction of the rotating disk, and the positioning device is provided with a positioning end part; and
and the scanning device is combined with the rotating disk, a connecting line of two ends of the scanning device is a second axis, the projection of the second axis on the rotating disk is overlapped with the other radial direction of the rotating disk, and the scanning device is provided with an image capturing end part.
2. The pipe measuring device of claim 1, wherein the two ends of the positioning device are respectively a coupling end and the positioning end, the coupling end is directly or indirectly coupled to the third slide rail, and a connection line between the coupling end and the positioning end is the first axis; the two ends of the scanning device are respectively a fixed end part and the image capturing end part, the fixed end part is combined with the rotating disc, and the connecting line of the image capturing end part and the fixed end part is the second axis.
3. A tube measuring device according to claim 2, wherein the positioning means is provided with a boss at the positioning end, the boss extending in the third direction.
4. The plumbing measurement device of claim 1, wherein the scanning device is provided with a height adjustment portion coupled to a fixed end of the scanning device.
5. A pipe measuring device as claimed in claim 1, wherein the rotary disc is provided with a motor, the motor being a stepper motor.
6. The tube measuring device of claim 1, wherein the movable seat has a stop member, and the rotating disc has a first stop and a second stop, the rotating disc being capable of rotating in a first rotational direction such that the first stop abuts the stop member; the rotating disc can rotate along a second rotating direction opposite to the first rotating direction, so that the second stop block abuts against the stop block.
7. The tubular measurement device of claim 1, wherein the fixed portion is a base plate, the fixed portion having a recess extending along the first direction.
8. The tube measuring device of claim 1, wherein the rotating plate is provided with a locking assembly that is capable of abutting the second rail.
9. The tube measuring device of claim 1, wherein the first axis and the second axis have an angle in a projection of the rotating disk, the angle being 180 degrees of sweet.
10. A pipe measurement method capable of being performed by the pipe measurement apparatus as claimed in claim 1, 2, 3, 4, 5, 6, 7 or 8, the pipe measurement method comprising:
fixing a pipe to be measured on the fixing part of the frame body, so that a central axis of the pipe to be measured is parallel to the first direction;
rotating the rotating disc to enable the positioning end part of the positioning device to face an opening of the pipe to be measured, and enabling the projection of the first axis to the rotating disc to be parallel to the first direction;
moving the rotating disc towards the pipe to be measured along the first direction, so that the positioning end part of the positioning device extends into the pipe to be measured through the opening;
positioning one end edge of the inner peripheral wall of the pipe to be measured in the third direction by using the positioning end part, and fixing the position of the rotating disc in the second direction;
moving the rotating disc along the first direction in a direction away from the pipe to be measured, so that the positioning end part of the positioning device is separated from the pipe to be measured;
rotating the rotating disc to make the image capturing end of the scanning device face the opening of the pipe to be measured and make the projection of the second axis on the rotating disc parallel to the first direction; and
and moving the rotating disc towards the pipe fitting to be measured along the first direction, so that the image capturing end part of the scanning device extends into the pipe fitting to be measured through the opening, and performing projection measurement on the inner peripheral wall of the pipe fitting to be measured by using the scanning device.
11. The tube measuring method of claim 10, wherein positioning the end edge of the tube to be measured with the positioning end portion comprises reciprocating the rotating disc in the second direction and reciprocating the positioning device in the third direction.
12. The tube measuring method of claim 10, wherein the first axis and the second axis have an included angle in the projection of the rotating disc, and rotating the rotating disc to direct the image capturing end of the scanning device toward the opening of the tube to be measured comprises rotating the rotating disc at the included angle around the rotation axis.
13. The tube measuring method according to claim 10, wherein the inner peripheral wall of the tube to be measured has a feature portion, and moving the rotating disc toward the tube to be measured along the first direction to allow the image capturing end of the scanning device to extend into the tube to be measured through the opening comprises controlling an amount of movement of the rotating disc along the first direction to allow the image capturing end to be aligned with the feature portion.
14. The tube measuring method of claim 13, wherein the performing the projection measurement on the inner peripheral wall of the tube to be measured by the scanning device comprises outputting a light beam covering the feature along an axis parallel to the third direction and passing through a central axis of the tube to be measured, and receiving the light beam reflected by the inner peripheral wall of the tube to be measured.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105141272A TWI617786B (en) | 2016-12-13 | 2016-12-13 | Pipe measuring apparatus and measuring method thereof |
| TW105141272 | 2016-12-13 |
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| CN108613631A CN108613631A (en) | 2018-10-02 |
| CN108613631B true CN108613631B (en) | 2020-02-11 |
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| TW (1) | TWI617786B (en) |
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| CN109764818B (en) * | 2019-03-05 | 2021-08-03 | 佛山市南海区广工大数控装备协同创新研究院 | Hard pipe automatic checkout device |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI617786B (en) | 2018-03-11 |
| CN108613631A (en) | 2018-10-02 |
| TW201821761A (en) | 2018-06-16 |
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