CN114509027B - Concentricity detection method of connector - Google Patents
Concentricity detection method of connector Download PDFInfo
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- CN114509027B CN114509027B CN202011278499.4A CN202011278499A CN114509027B CN 114509027 B CN114509027 B CN 114509027B CN 202011278499 A CN202011278499 A CN 202011278499A CN 114509027 B CN114509027 B CN 114509027B
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- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 239000004020 conductor Substances 0.000 claims abstract description 129
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
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Abstract
The invention discloses a concentricity detection method of a connector, which comprises an outer conductor and a connector body, wherein the connector body is positioned on the outer conductorAn inner conductor of the conductors, the method comprising the steps of: shooting an end face image of the connector; identifying a center C1 of the outer conductor and a center C2 of the inner conductor from the captured end face image; according to the formulaCalculating concentricity C of the outer and inner conductors of the connector, where x 1 And y 1 Represents the transverse coordinate position and the longitudinal coordinate position, x, of the center C1 of the outer conductor 2 And y 2 Representing the lateral and longitudinal coordinate positions of the center C2 of the inner conductor. The invention can conveniently, rapidly and accurately detect the concentricity of the outer conductor and the inner conductor of the connector, and improves the concentricity detection efficiency and accuracy.
Description
Technical Field
The invention relates to a concentricity detection method of a connector.
Background
To facilitate connection, connectors are typically mounted on the ends of the coaxial cable. For example, a male connector is mounted on one end of one coaxial cable and a female connector is mounted on one end of the other coaxial cable. In this way, a quick connection of the coaxial cable can be conveniently achieved by mating the male and female connectors.
In order to ensure that the female connector can be connected with the male connector, the quality of the female connector must be checked. One of the main tasks of the inspection is to detect concentricity of the outer conductor (or called outer terminal) and the inner conductor (or called center terminal) of the female connector. In the prior art, concentricity can be detected only by manual mode, and the method has low efficiency, poor accuracy and easy misjudgment.
Disclosure of Invention
The present invention is directed to solving at least one of the above-mentioned problems and disadvantages of the prior art.
According to an aspect of the present invention, there is provided a concentricity detection method of a connector including an outer conductor and an inner conductor located in the outer conductor, the method comprising the steps of:
s10: shooting an end face image of the connector;
s20: a center C1 of the outer conductor and a center C2 of the inner conductor are identified from the photographed end face image,
s30: concentricity C of the outer conductor and the inner conductor of the connector is calculated according to the following formula,
wherein,,
x 1 and y 1 Represents the lateral and longitudinal coordinate positions of the center C1 of the outer conductor,
x 2 and y 2 Representing the lateral and longitudinal coordinate positions of the center C2 of the inner conductor.
According to an exemplary embodiment of the invention, identifying the center C1 of the outer conductor comprises the steps of:
s110: drawing a first circular ring on the end face image, wherein the inner diameter R11 of the first circular ring is smaller than the theoretical outer diameter R10 of the outer conductor, and the outer diameter R12 of the first circular ring is larger than the theoretical outer diameter R10 of the outer conductor;
s120: moving the first ring such that an outer contour of the outer conductor is located in a coverage area of the first ring;
s130: drawing N1 first radial extension lines on the first circular ring, wherein the N1 first radial extension lines equally divide the first circular ring into N1 equal parts, and each first radial extension line points to the center of the first circular ring, wherein N1 is a positive integer not less than 3;
s140: identifying the position of the intersection point P1 between each first radially extending line and the outer contour line of the outer conductor;
s150: fitting a first circle according to the identified N1 intersection points P1 between the first radial extension line and the outer contour line of the outer conductor, wherein the center C1 of the outer conductor is the circle center of the fitted first circle.
According to another exemplary embodiment of the present invention, identifying the center C2 of the inner conductor comprises the steps of:
s210: drawing a second circular ring on the end face image, wherein the inner diameter R21 of the second circular ring is smaller than the theoretical outer diameter R20 of the inner conductor, and the outer diameter R22 of the second circular ring is larger than the theoretical outer diameter R20 of the inner conductor;
s220: moving the second ring such that the outer contour of the inner conductor is located in the coverage area of the second ring;
s230: drawing N2 second radial extension lines on the second circular ring, wherein the N2 second radial extension lines equally divide the second circular ring into N2 equal parts, and each second radial extension line points to the center of the second circular ring, wherein N2 is a positive integer not less than 3;
s240: identifying the position of the intersection point P2 between each second radially extending line and the outer contour line of the inner conductor;
s250: fitting a second circle according to the identified N2 intersection points P2 between the second radial extension line and the outer contour line of the inner conductor, wherein the center C2 of the inner conductor is the center of the fitted second circle.
According to another exemplary embodiment of the present invention, the inner diameter R11 of the first ring is smaller than the theoretical outer diameter R10 of the outer conductor by a first predetermined value D1, and the outer diameter R12 of the first ring is larger than the theoretical outer diameter R10 of the outer conductor by the first predetermined value D1.
According to another exemplary embodiment of the present invention, the first predetermined value D1 is 0.05 to 0.2 times the theoretical outer diameter R10 of the outer conductor.
According to another exemplary embodiment of the present invention, an inner diameter R21 of the second ring is smaller than a theoretical outer diameter R20 of the inner conductor by a second predetermined value D2, and an outer diameter R22 of the second ring is larger than the theoretical outer diameter R20 of the inner conductor by the second predetermined value D2.
According to another exemplary embodiment of the present invention, the second predetermined value D2 is 0.05 to 0.2 times the theoretical outer diameter R20 of the inner conductor.
According to another exemplary embodiment of the present invention, N1 first rectangular sub-areas are drawn on the first ring, the N1 first rectangular sub-areas are uniformly spaced around the circumferential direction, and the N1 first radial extension lines are respectively in the N1 first rectangular sub-areas; in the step S140, image processing and calculation are performed on the N1 first rectangular sub-areas on the first ring to identify the position of the intersection point P1 between the first radially extending line and the outer contour line of the outer conductor.
According to another exemplary embodiment of the present invention, N2 second rectangular sub-areas are drawn on the second ring, the N2 second rectangular sub-areas are uniformly spaced around the circumferential direction, and the N2 second radial extension lines are respectively located in the N2 second rectangular sub-areas; in the step S240, image processing and calculation are performed on the N2 second rectangular sub-areas on the second ring to identify the position of the intersection point P2 between the second radially extending line and the outer contour line of the inner conductor.
According to another exemplary embodiment of the present invention, the connector is a female coaxial cable connector adapted to be mounted on an end of a coaxial cable.
In the foregoing exemplary embodiments according to the present invention, concentricity of the outer conductor and the inner conductor of the connector can be conveniently, rapidly and accurately detected, and concentricity detection efficiency and accuracy are improved.
Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, which provide a thorough understanding of the present invention.
Drawings
FIG. 1 shows an end-face image of a connector according to an exemplary embodiment of the invention;
FIG. 2 shows a schematic drawing of a first ring and a plurality of first radially extending lines on the end image shown in FIG. 1;
FIG. 3 shows a schematic view of the intersection between a first radially extending line on the end face image shown in FIG. 2 and the outer contour line of the outer conductor;
FIG. 4 shows a schematic view of a first circle fitted according to the intersection between the first radially extending line shown in FIG. 3 and the outer contour of the outer conductor;
FIG. 5 shows a schematic drawing of a second ring and a plurality of second radially extending lines on the end image shown in FIG. 1;
FIG. 6 shows a schematic view of the intersection between a second radially extending line on the end face image shown in FIG. 5 and the outer contour line of the inner conductor;
fig. 7 shows a schematic view of a second circle fitted according to the intersection between the second radially extending line shown in fig. 6 and the outer contour of the inner conductor.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present invention with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.
According to one general technical concept of the present invention, there is provided a concentricity detection method of a connector including an outer conductor and an inner conductor located in the outer conductor, the method including the steps of: shooting an end face image of the connector; identifying a center C1 of the outer conductor and a center C2 of the inner conductor from the captured end face image; according to the formulaCalculating concentricity C of the outer and inner conductors of the connector, where x 1 And y 1 Represents the transverse coordinate position and the longitudinal coordinate position, x, of the center C1 of the outer conductor 2 And y 2 Representing the lateral and longitudinal coordinate positions of the center C2 of the inner conductor.
Fig. 1 shows an end-face image of a connector according to an exemplary embodiment of the present invention.
As shown in fig. 1, in the illustrated embodiment, the connector 10 includes an outer conductor 11 and an inner conductor 12 located in the outer conductor 11. The outer conductor 11 has an outer contour 11a (outermost cut-off in fig. 1) and the inner conductor 12 has an outer contour 12a (innermost cut-off in fig. 1).
In one embodiment of the invention, the connector 10 may be a female coaxial cable connector adapted to be mounted on an end of a coaxial cable. However, the present invention is not limited thereto, and the connector 10 may be another type of connector.
As shown in fig. 1 to 7, in the illustrated embodiment, the concentricity detection method of the connector mainly includes the steps of:
s10: capturing an end face image of the connector 10 (see fig. 1);
s20: identifying the center C1 of the outer conductor 11 and the center C2 of the inner conductor 12 from the captured end face image (see fig. 4 and 7);
s30: concentricity C of the outer conductor 11 and the inner conductor 12 of the connector 10 is calculated according to the following formula,
wherein,,
x 1 and y 1 Represents the lateral coordinate position and the longitudinal coordinate position of the center C1 of the outer conductor 11,
x 2 and y 2 The lateral coordinate position and the longitudinal coordinate position of the center C2 of the inner conductor 12 are indicated.
FIG. 2 shows a schematic drawing of a first ring and a plurality of first radially extending lines on the end image shown in FIG. 1; FIG. 3 shows a schematic view of the intersection between a first radially extending line on the end face image shown in FIG. 2 and the outer contour line of the outer conductor; fig. 4 shows a schematic view of a first circle fitted according to the intersection between the first radially extending line shown in fig. 3 and the outer contour of the outer conductor.
A process of identifying the center C1 of the outer conductor 11 will be described in detail with reference to fig. 1 to 4. Identifying the center C1 of the outer conductor 11 includes the steps of:
s110: drawing a first circular ring 1 on the end face image, wherein the inner diameter R11 of the first circular ring 1 is smaller than the theoretical outer diameter R10 of the outer conductor 11, and the outer diameter R12 of the first circular ring 1 is larger than the theoretical outer diameter R10 of the outer conductor 11;
s120: moving the first ring 1 such that the outer contour 11a of the outer conductor 11 is located in the coverage area of the first ring 1;
s130: drawing N1 first radial extension lines 1a on the first circular ring 1, wherein the N1 first radial extension lines 1a equally divide the first circular ring 1 into N1 equal parts, and each first radial extension line 1a points to the center C1' of the first circular ring 1, wherein N1 is a positive integer not less than 3;
s140: identifying the position of the intersection point P1 between each first radially extending line 1a and the outer contour line 11a of the outer conductor 11;
s150: a first circle 11C is fitted according to the identified N1 intersections P1 between the first radially extending line 1a and the outer contour line 11a of the outer conductor 11, and the center C1 of the outer conductor 11 is the center of the fitted first circle 11C.
As shown in fig. 2, in the illustrated embodiment, the inner diameter R11 of the first ring 1 is smaller than the theoretical outer diameter R10 of the outer conductor 11 by a first predetermined value D1, and the outer diameter R12 of the first ring 1 is larger than the theoretical outer diameter R10 of the outer conductor 11 by a first predetermined value D1.
As shown in fig. 2, in the illustrated embodiment, the magnitude of the first predetermined value D1 affects the accuracy of the center C1 of the identified outer conductor 11. Typically, the first predetermined value D1 is 0.05 to 0.2 times the theoretical outer diameter R10 of the outer conductor 11.
As shown in fig. 2, in the illustrated embodiment, N1 first rectangular sub-areas 1b are drawn on the first ring 1, N1 first rectangular sub-areas 1b are uniformly spaced around the circumferential direction, and N1 first radially extending lines 1a are respectively in N1 first rectangular sub-areas 1 b.
As shown in fig. 2 and 3, in the illustrated embodiment, in step S140, image processing and calculation are performed on the N1 first rectangular subregions 1b on the first ring 1 to identify the position of the intersection point P1 between the first radially extending line 1a and the outer contour line 11a of the outer conductor 11. This can reduce the amount of calculation because the entire end face image is not processed and calculated.
FIG. 5 shows a schematic drawing of a second ring and a plurality of second radially extending lines on the end image shown in FIG. 1; FIG. 6 shows a schematic view of the intersection between a second radially extending line on the end face image shown in FIG. 5 and the outer contour line of the inner conductor; fig. 7 shows a schematic view of a second circle fitted according to the intersection between the second radially extending line shown in fig. 6 and the outer contour of the inner conductor.
The process of identifying the center C2 of the inner conductor 12 will be described in detail below with reference to fig. 1, 5 to 7. Identifying the center C2 of the inner conductor 12 mainly includes the steps of:
s210: drawing a second circular ring 2 on the end face image, wherein the inner diameter R21 of the second circular ring 2 is smaller than the theoretical outer diameter R20 of the inner conductor 12, and the outer diameter R22 of the second circular ring 2 is larger than the theoretical outer diameter R20 of the inner conductor 12;
s220: moving the second ring 2 such that the outer contour 12a of the inner conductor 12 is located in the coverage area of the second ring 2;
s230: drawing N2 second radial extension lines 2a and N2 second radial extension lines 2a on the second circular ring 2, dividing the second circular ring 2 into N2 equal parts, and enabling each second radial extension line 2a to point to the center C2' of the second circular ring 2, wherein N2 is a positive integer not less than 3;
s240: identifying the position of the intersection point P2 between each second radially extending line 2a and the outer contour line 12a of the inner conductor 12;
s250: a second circle 12C is fitted according to the identified N2 intersections P2 between the second radially extending line 2a and the outer contour line 12a of the inner conductor 12, the center C2 of the inner conductor 12 being the center of the fitted second circle 12C.
As shown in fig. 5, in the illustrated embodiment, the inner diameter R21 of the second ring 2 is smaller than the theoretical outer diameter R20 of the inner conductor 12 by a second predetermined value D2, and the outer diameter R22 of the second ring 2 is larger than the theoretical outer diameter R20 of the inner conductor 12 by a second predetermined value D2.
As shown in fig. 5, in the illustrated embodiment, the magnitude of the second predetermined value D2 affects the accuracy of the center C1 of the identified outer conductor 11. Typically, the second predetermined value D2 is 0.05 to 0.2 times the theoretical outer diameter R20 of the inner conductor 12.
As shown in fig. 5, in the illustrated embodiment, N2 second rectangular sub-areas 2b are drawn on the second ring 2, N2 second rectangular sub-areas 2b are uniformly spaced around the circumferential direction, and N2 second radially extending lines 2a are respectively located in the N2 second rectangular sub-areas 2 b.
As shown in fig. 5 and 6, in the illustrated embodiment, in step S240, image processing and calculation are performed on the N2 second rectangular subregions 2b on the second ring 2 to identify the position of the intersection point P2 between the second radially extending line 2a and the outer contour 12a of the inner conductor 12. This can reduce the amount of calculation because the entire end face image is not processed and calculated.
Those skilled in the art will appreciate that the embodiments described above are exemplary and that modifications may be made by those skilled in the art, and that the structures described in the various embodiments may be freely combined without conflict in terms of structure or principle.
Although the present invention has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the invention and are not to be construed as limiting the invention.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and that the word "a" or "an" does not exclude a plurality. In addition, any element numbers of the claims should not be construed as limiting the scope of the invention.
Claims (8)
1. A concentricity detection method of a connector, the connector (10) comprising an outer conductor (11) and an inner conductor (12) located in the outer conductor (11), the method comprising the steps of:
s10: capturing an end face image of the connector (10);
s20: identifying a center C1 of the outer conductor (11) and a center C2 of the inner conductor (12) from the captured end face image,
s30: the concentricity C of the outer conductor 11 and the inner conductor 12 of the connector 10 is calculated according to the following formula,
wherein,,
x 1 and y 1 Represents the transverse coordinate position and the longitudinal coordinate position of the center C1 of the outer conductor (11),
x 2 and y 2 Represents the transverse and longitudinal coordinate positions of the center C2 of the inner conductor (12),
identifying the center C1 of the outer conductor (11) comprises the steps of:
s110: drawing a first circular ring (1) on the end face image, wherein the inner diameter R11 of the first circular ring (1) is smaller than the theoretical outer diameter R10 of the outer conductor (11), and the outer diameter R12 of the first circular ring (1) is larger than the theoretical outer diameter R10 of the outer conductor (11);
s120: -moving the first ring (1) such that the outer contour (11 a) of the outer conductor (11) is located in the coverage area of the first ring (1);
s130: drawing N1 first radial extension lines (1 a) on the first circular ring (1), wherein the N1 first radial extension lines (1 a) divide the first circular ring (1) into N1 equal parts, and each first radial extension line (1 a) points to the center (C1') of the first circular ring (1), wherein N1 is a positive integer not less than 3;
s140: identifying the position of the intersection point P1 between each first radially extending line (1 a) and the outer contour line (11 a) of the outer conductor (11);
s150: fitting a first circle (11C) according to the identified N1 intersection points P1 between the first radial extension line (1 a) and the outer contour line (11 a) of the outer conductor (11), wherein the center C1 of the outer conductor (11) is the circle center of the fitted first circle (11C);
identifying the center C2 of the inner conductor (12) comprises the steps of:
s210: drawing a second circular ring (2) on the end face image, wherein the inner diameter R21 of the second circular ring (2) is smaller than the theoretical outer diameter R20 of the inner conductor (12), and the outer diameter R22 of the second circular ring (2) is larger than the theoretical outer diameter R20 of the inner conductor (12);
s220: -moving the second ring (2) such that the outer contour (12 a) of the inner conductor (12) is located in the coverage area of the second ring (2);
s230: drawing N2 second radial extension lines (2 a) on the second circular ring (2), wherein the N2 second radial extension lines (2 a) equally divide the second circular ring (2) into N2 equal parts, and each second radial extension line (2 a) points to the center (C2') of the second circular ring (2), wherein N2 is a positive integer not less than 3;
s240: identifying the position of the intersection point P2 between each second radially extending line (2 a) and the outer contour line (12 a) of the inner conductor (12);
s250: -fitting a second circle (12C) according to the identified N2 intersections P2 between the second radially extending line (2 a) and the outer contour line (12 a) of the inner conductor (12), the center C2 of the inner conductor (12) being the centre of the fitted second circle (12C).
2. The concentricity detection method of the connector according to claim 1, wherein:
the inner diameter R11 of the first circular ring (1) is smaller than the theoretical outer diameter R10 of the outer conductor (11) by a first preset value D1, and the outer diameter R12 of the first circular ring (1) is larger than the theoretical outer diameter R10 of the outer conductor (11) by the first preset value D1.
3. The concentricity detection method of the connector according to claim 2, wherein:
the first predetermined value D1 is 0.05 to 0.2 times the theoretical outer diameter R10 of the outer conductor (11).
4. The concentricity detection method of the connector according to claim 1, wherein:
the inner diameter R21 of the second circular ring (2) is smaller than the theoretical outer diameter R20 of the inner conductor (12) by a second preset value D2, and the outer diameter R22 of the second circular ring (2) is larger than the theoretical outer diameter R20 of the inner conductor (12) by the second preset value D2.
5. The concentricity detection method of the connector according to claim 4, wherein:
the second predetermined value D2 is 0.05 to 0.2 times the theoretical outer diameter R20 of the inner conductor (12).
6. The concentricity detection method of the connector according to claim 1, wherein:
drawing N1 first rectangular sub-areas (1 b) on the first circular ring (1), wherein the N1 first rectangular sub-areas (1 b) are uniformly distributed at intervals around the circumferential direction, and the N1 first radial extension lines (1 a) are respectively in the N1 first rectangular sub-areas (1 b);
in the step S140, image processing and calculation are performed on the N1 first rectangular sub-areas (1 b) on the first ring (1) to identify the position of the intersection point P1 between the first radially extending line (1 a) and the outer contour line (11 a) of the outer conductor (11).
7. The concentricity detection method of the connector according to claim 1, wherein:
drawing N2 second rectangular sub-areas (2 b) on the second circular ring (2), wherein the N2 second rectangular sub-areas (2 b) are uniformly distributed at intervals around the circumferential direction, and the N2 second radial extension lines (2 a) are respectively positioned in the N2 second rectangular sub-areas (2 b);
in the step S240, image processing and calculation are performed on the N2 second rectangular sub-areas (2 b) on the second ring (2) to identify the position of the intersection point P2 between the second radially extending line (2 a) and the outer contour line (12 a) of the inner conductor (12).
8. The concentricity detection method of the connector according to claim 1, wherein:
the connector (10) is a female coaxial cable connector adapted to be mounted on an end of a coaxial cable.
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