CN115540746A - Method for detecting position degree of side hole of structural part - Google Patents
Method for detecting position degree of side hole of structural part Download PDFInfo
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- CN115540746A CN115540746A CN202210011049.1A CN202210011049A CN115540746A CN 115540746 A CN115540746 A CN 115540746A CN 202210011049 A CN202210011049 A CN 202210011049A CN 115540746 A CN115540746 A CN 115540746A
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- side hole
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The application relates to the technical field of detection, aims to solve the problem that the appearance of a product is easily damaged in a structural part side hole detection mode in the prior art, and provides a structural part side hole position degree detection method which comprises the steps of arranging a first 2D photographing device and facing a first reference characteristic along the Z direction; arranging a reflector on the outer side of the structural part, wherein the reflector is obliquely arranged between the side hole and the first 2D photographing equipment and used for reflecting the image of the side hole to the first 2D photographing equipment; shooting by adopting first 2D shooting equipment to obtain a combined picture; the combined picture comprises a first region and a second region, the first region comprises the imaging of the first 2D photographing equipment on the first reference characteristic, and the second region comprises the imaging of the first 2D photographing equipment on the side hole through the reflector; and detecting the relative position of the imaging of the side hole in the second region in the combined picture and the first reference feature as the position degree of the side hole. The beneficial effects of this application are that can conveniently accurately obtain the position degree of side opening, and be difficult to damage the side opening.
Description
Technical Field
The application relates to the technical field of detection, in particular to a method for detecting position degree of a side hole of a structural part.
Background
Some structural components, such as the middle frame of electronic equipment such as mobile phones, tablet computers and the like, are provided with side holes. Taking a mobile phone as an example, the side of the frame is provided with side holes such as a volume key hole, a power key hole, a USB hole, etc. In order to ensure the position accuracy of the side holes, the position degree of the side holes needs to be detected after the middle frame is machined.
In the prior art, a detection mode adopted for a side hole of a middle frame of an electronic device such as a mobile phone is a contact detection mode by adopting a height gauge or other position degree detection tools. This can result in a loss of product appearance upon inspection.
Disclosure of Invention
The present application provides a structural member a method for detecting the position degree of a side hole, the problem that the appearance of a product is easily damaged in a structural part side hole detection mode in the prior art is solved.
In a first aspect, an embodiment of the present application provides a method for detecting a position degree of a side hole of a structural member, where the structural member includes an outer frame, a first reference feature, and a second reference feature, and the side hole is opened on an outer side surface of the outer frame; the first reference feature and the side hole are fixed relatively, the first reference feature faces to the Z direction, and the Z direction is parallel to the thickness direction of the outer frame; the second datum feature is positioned on the inner side of the outer frame and provided with a first surface perpendicular to the Z direction, the outer frame is provided with a second surface, the second surface is a top surface of the outer frame on one side of the Z direction, the second surface is in the same direction as the first surface, and the second surface is higher than the first surface along the Z direction, so that a step shape is formed between the second surface and the first surface; the method for detecting the position degree of the side hole of the structural part comprises the following steps:
setting a 2D photographing device, and enabling the 2D photographing device to face the first reference feature along the Z direction;
arranging a reflector, wherein the reflector is arranged on the outer side of the structural part, obliquely corresponds to the position between the side hole and the 2D photographing equipment and is used for reflecting the image of the side hole to the 2D photographing equipment;
shooting by adopting 2D shooting equipment to obtain a combined picture; the combined picture comprises a first region and a second region, the first region comprises the imaging of the 2D photographing equipment on the first reference characteristic, and the second region comprises the imaging of the 2D photographing equipment on the side hole through the reflector; the imaging of the side hole comprises imaging of an upper contour line and/or a lower contour line of the side hole in the Z direction and imaging of the second surface, and the distance Z1 from the upper contour line and/or the lower contour line to the imaged contour line of the second surface is obtained;
detecting the relative position of the imaging of the side hole in the second region in the combined picture and the first reference feature as the position degree of the side hole in the plane vertical to the Z direction;
arranging a 3D photographing device, wherein the 3D photographing device faces to the first surface and the second surface along the Z direction, and the 3D photographing device scans the first surface and the second surface to obtain a distance Z2 between the first surface and the second surface;
and obtaining the Z-direction position degree Z0, Z0= | Z1-Z2| of the side hole.
According to the method for detecting the position degree of the structural part side hole, the combined picture with the structural part side hole and the first reference feature on one surface on the same side is obtained through the 2D photographing equipment and the reflector, so that the position of the side hole relative to the first reference feature, namely the position degree of the side hole in a plane vertical to the Z direction, can be conveniently and accurately obtained; meanwhile, the distance between the Z-direction contour line of the side hole and the second surface is obtained through a combined picture, and the Z-direction distance between the first surface and the second surface is obtained through 3D photographing equipment; and then the absolute value of the difference value of the distances is used as the Z-direction position degree of the side hole.
Namely, the method for detecting the position degree of the structural part side hole in the embodiment can conveniently and quickly obtain the position degree of the structural part side hole in the Z direction and the position degree in the Z direction plane perpendicular to the Z direction through the combination of 2D photographing and 3D photographing, and the side hole is not easily damaged in the operation process.
In one possible implementation, the imaging of the first reference feature in the first region includes a first circle and a second circle, a center O1 of the first circle and a center O2 of the second circle being non-coincident; constructing a straight line L1 by using the circle center O1 of the first circle and the circle center O2 of the second circle, taking the straight line L1 as a Y axis after rotating around the circle center O1 of the first circle by a set angle, and taking a straight line which passes through the circle center O2 of the second circle and is vertical to the Y axis as an X axis to construct a plane rectangular coordinate system XY; taking a datum point on the imaging of the side hole in the second region; and obtaining the distance from the reference point to the X axis as the Y-direction position degree of the side hole, and/or obtaining the distance from the reference point to the Y axis as the X-direction position degree of the side hole.
In this implementation, the imaging of the first reference feature includes the first circle and the second circle, and the circle center position can be conveniently obtained in an image manner, so that the member plane rectangular coordinate system XY can be conveniently and accurately constructed, and the value of the X-direction position degree or the Y-direction position degree of the side hole can be obtained.
In a possible implementation manner, the first reference feature includes a first round hole and a second round hole which are formed by being recessed from the Z-direction side surface of the structural member, the first round hole is imaged as a first circle through the 2D photographing device, and the second round hole is imaged as a second circle through the 2D photographing device.
In this implementation, set up first round hole and second round hole as first benchmark characteristic through the structure, can conveniently make it shoot equipment formation of image as first circle and second circle by 2D.
In one possible implementation, the side hole is oblong; the method for taking the datum point comprises the following steps: and respectively taking the maximum points of the two ends of the side hole in the second region in the length direction, and taking the midpoint of the maximum points of the two ends in the length direction as a reference point.
In the implementation mode, the two long-direction end points of the long circular side hole imaging are obtained in the image easily and accurately, so that the position between the two long-direction end points can be obtained accurately, and the Y-direction position/X-direction position of the side hole can be well reflected.
In one possible implementation, the reflective surface of the mirror is at 45 ° to the Z-direction.
In the implementation mode, the reflecting surface and the Z direction form 45 degrees, so that the vertically intersected characteristics of the surfaces are imaged in the same combined picture, and the relative positions of the images of the side holes and the images of the first reference characteristics in the X direction/the Y direction in the combined picture are kept consistent with the structure material object through the arrangement of the positions of the reflector and the first 2D photographing equipment.
In one possible implementation, the outer contour of the projection of the structural element in a plane perpendicular to the Z direction is substantially rectangular; the Y-axis is parallel to the long or short sides of the rectangle.
In the implementation mode, the Y axis of the plane rectangular coordinate system XY is perpendicular to the long side or the short side of the projection of the structural part, and the obtained position degree value of the side hole can well reflect the position degree of the side hole along the long side or the short side of the structural part.
In one possible implementation, the side holes are oriented along the X-axis, or alternatively, the side holes are oriented along the Y-axis.
In this implementation, the side hole may be a volume key hole, a power key hole, or the like, which is provided on a long side of the structural member, for example, a long side of a common middle frame of a mobile phone; or a USB hole arranged on the short side of the structural part, such as the short side of the middle frame of the mobile phone.
In one possible implementation, the first 2D photographing device includes a CCD camera.
In this implementation, the first 2D photographing device adopts a CCD camera, and can obtain the size between the required features through taking a picture.
In a possible implementation manner, the first 2D photographing device further includes a light source system for shining light on the structural member.
In the implementation mode, the light source system is arranged, so that the photographing quality of the CCD camera can be improved, and the precision of obtaining the required size through pictures is improved.
In one possible implementation, the light source system includes a coaxial light source, an annular light source, and a bar light source; the coaxial light source and the CCD camera are parallel in orientation, the center of the annular light source is coincided with the center of the CCD camera, and the orientation of the strip-shaped light source is obliquely intersected with the Z direction.
In the realization mode, the coaxial light source, the annular light source and the strip-shaped light source are used for polishing all ranges, so that the polishing quality is improved, and the quality of the shot picture is improved.
In one possible implementation, the 3D photographing device is a line laser 3D camera.
In this implementation, adopt line laser 3D camera, can pass through line laser scanning first surface and second surface and obtain the Z of first surface and second surface to the distance.
In a possible implementation manner, the second reference feature is a boss, the boss is fixed relative to the outer frame, and a surface of one side, in the Z direction, of the boss is the first surface.
In this implementation, the second reference feature is a boss inside the outer frame, and a step is formed between the first surface and the second surface of the boss, so that the 3D photographing device can easily scan and obtain the distance between the first surface and the second surface.
In a possible implementation manner, the structural member further comprises a frame plate, the plate surface of the frame plate is perpendicular to the Z direction, and the outer frame surrounds the periphery of the frame plate and is fixedly connected with the frame plate; the boss is fixedly connected to one side of the frame plate.
In this embodiment, the boss can be reliably fixed to the frame plate, and the position of the boss and the outer frame can be easily determined.
In a possible implementation manner, the structural member is a middle frame of the electronic device, and the side hole is a volume key hole, a power key hole, a card support hole or a USB hole formed in a side surface of the middle frame.
In this implementation, the position degree can be measured by the aforementioned manner through the side holes such as the volume key hole, the power key hole, the card support hole, and the USB hole of the middle frame of the electronic device.
In a second aspect, an embodiment of the present application provides a method for detecting a position degree of a side hole in a structural member, where the structural member includes an outer frame and a first reference feature, and the side hole is formed in an outer side surface of the outer frame; the first reference feature and the side hole are fixed relatively, the first reference feature faces to the Z direction, and the Z direction is parallel to the thickness direction of the outer frame; the method for detecting the position degree of the side hole of the structural part comprises the following steps:
arranging a first 2D photographing device, and enabling the first 2D photographing device to face a first reference characteristic along the Z direction;
arranging a reflector, wherein the reflector is arranged on the outer side of the structural part, obliquely corresponds to the position between the side hole and the first 2D photographing equipment and is used for reflecting the image of the side hole to the first 2D photographing equipment;
shooting by adopting first 2D shooting equipment to obtain a combined picture; the combined picture comprises a first region and a second region, the first region comprises the imaging of the first 2D photographing equipment on the first reference characteristic, and the second region comprises the imaging of the first 2D photographing equipment on the side hole through the reflector;
and detecting the relative position of the imaging of the side hole in the second region in the combined picture and the first reference feature as the position degree of the side hole.
According to the method for detecting the position degree of the structural part side hole in the embodiment of the application, the combined picture of the structural part side hole and the first reference feature on one surface is obtained through the first 2D photographing device and the reflector, so that the position of the side hole relative to the first reference feature, namely the position degree of the side hole, can be conveniently and accurately obtained.
In a third aspect, an embodiment of the present application provides a method for detecting a position degree of a side hole in a structural member, where the structural member includes an outer frame and a second reference feature, and the side hole is opened in an outer side surface of the outer frame; the second datum feature is positioned on the inner side of the outer frame and provided with a first surface perpendicular to the Z direction, and the Z direction is parallel to the thickness direction of the outer frame; the outer frame is provided with a second surface, the second surface is the top surface of one side of the outer frame in the Z direction, the orientation of the second surface is the same as that of the first surface, and the second surface is higher than the first surface in the Z direction so as to form a step shape between the second surface and the first surface; the method for detecting the position degree of the side hole of the structural part comprises the following steps:
arranging second 2D photographing equipment, wherein the second 2D photographing equipment corresponds to the outer side face of the outer frame and faces the side hole;
shooting by adopting second 2D shooting equipment to obtain a first picture, wherein the first picture comprises an image of an upper contour line and/or a lower contour line of the side hole in the Z direction on the second 2D shooting equipment and an image of the second surface on the second 2D shooting equipment, and a distance Z1 from the upper contour line and/or the lower contour line to a contour line of the image of the second surface is obtained;
arranging a 3D photographing device, wherein the 3D photographing device faces to the first surface and the second surface along the Z direction, and the 3D photographing device scans the first surface and the second surface to obtain a distance Z2 between the first surface and the second surface;
and obtaining the Z-position degree Z0, Z0= | Z1-Z2| of the side hole.
According to the method for detecting the position degree of the structural part side hole in the embodiment of the application, the second surface is selected as an intermediate reference, a first picture is shot towards the side hole through second 2D shooting equipment, and then the distance between the Z-direction contour line of the side hole and the second surface is obtained; scanning the first surface and the second surface through the 3D photographing equipment to obtain the Z-direction distance between the first surface and the second surface; and then the absolute value of the difference value of the distances is used as the Z-direction position degree of the side hole.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 shows an embodiment of the present application a schematic structural diagram of a mobile phone middle frame;
FIG. 2 is a front view of the handset bezel of FIG. 1;
FIG. 3 isbase:Sub>A cross-sectional view of the bezel of the handset of FIG. 2 taken along line A-A;
FIG. 4 is a side view of the handset bezel of FIG. 2;
FIG. 5 is an enlarged view of FIG. 4 at B;
FIG. 6 is a bottom view of the handset bezel of FIG. 2;
FIG. 7 is a simplified diagram of a composite picture when measuring the Y-direction position of the volume key hole on the long side;
FIG. 8 is a schematic diagram of the operation of measuring the Y-position of the volume key hole on the long side;
FIG. 9 is a schematic diagram of the operation of measuring the X-direction position of the USB hole on the short side;
FIG. 10 is a simplified diagram of a combined picture when measuring the X-position of a USB hole on the short side;
FIG. 11 is a schematic diagram of the operation of measuring the Z-direction position of the volume key hole on the long side;
FIG. 12 is a simplified view of the operation of measuring the Z-direction and X/Y-direction position of the side hole at the same time;
fig. 13 is a simplified diagram of a combined picture when the Z-direction and X/Y-direction position degrees of the side hole are measured simultaneously.
Description of the main element symbols:
The long side 13
First 2D photographing device 16
Coaxial light source 20
Annular light source 21
Bar light source 22
Second 2D photographing apparatus 28
Longitudinal end points D1, D3
Longitudinal midpoints D2, D4
Side hole K1
Volume key hole K2
Power supply key hole K3
USB hole K4
First round hole K5
Second round hole K6
Line L1
Upper contour line L2
Lower outline L3
Outer side surface P1
Second surface P2
First surface P3
Reflecting surface P4
Installation space Q1
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Some embodiments of the present application are described in detail. In the following embodiments, features of the embodiments may be combined with each other without conflict.
Examples
Side holes are arranged on the middle frame of some structural components, such as electronic equipment like mobile phones and tablet computers, and are used as a volume key hole, a power supply key hole, a USB hole, a card support hole, a sound outlet hole, a memory card hole, a loudspeaker hole and the like. In order to ensure the position accuracy of the structural part side hole, the position degree of the side hole is often detected after processing. If in each cell-phone center side opening that adopts CNC processing, the position precision of button such as volume key hole, power key hole increases, can promote the button of volume key, power key and feel, and the position precision increase in USB hole, card support hole is favorable to guaranteeing the plug function of USB plug, card support.
The embodiment of the application provides a method for detecting the position degree of a side hole of a structural part, wherein the structural part comprises an outer frame and a first reference characteristic, and the side hole is formed in the outer side surface of the outer frame; the first reference feature and the side hole are fixed relatively, the first reference feature faces to the Z direction, and the Z direction is parallel to the thickness direction of the outer frame; the method for detecting the position degree of the side hole of the structural part comprises the following steps:
arranging a first 2D photographing device, and enabling the first 2D photographing device to face a first reference characteristic along the Z direction;
arranging a reflector, wherein the reflector is arranged on the outer side of the structural part, obliquely corresponds to the position between the side hole and the first 2D photographing equipment, and is used for reflecting the image of the side hole to the first 2D photographing equipment;
shooting by adopting first 2D shooting equipment to obtain a combined picture; the combined picture comprises a first region and a second region, the first region comprises the imaging of the first 2D photographing equipment on the first reference characteristic, and the second region comprises the imaging of the first 2D photographing equipment on the side hole through the reflector;
and detecting the relative position of the imaging of the side hole in the second region in the combined picture and the first reference feature as the position degree of the side hole.
According to the method for detecting the position degree of the structural part side hole in the embodiment of the application, the combined picture of the structural part side hole and the first reference feature on one surface is obtained through the first 2D photographing device and the reflector, so that the position of the side hole relative to the first reference feature, namely the position degree of the side hole, can be conveniently and accurately obtained.
The embodiment of the application also provides a method for detecting the position degree of the side hole of the structural part, wherein the structural part comprises an outer frame and a second datum characteristic, and the side hole is formed in the outer side surface of the outer frame; the second datum feature is positioned on the inner side of the outer frame and provided with a first surface perpendicular to the Z direction, and the Z direction is parallel to the thickness direction of the outer frame; the outer frame is provided with a second surface, the second surface is the top surface of one side of the outer frame in the Z direction, the orientation of the second surface is the same as that of the first surface, and the second surface is higher than the first surface in the Z direction, so that a step shape is formed between the second surface and the first surface; the method for detecting the position degree of the side hole of the structural part comprises the following steps:
arranging second 2D photographing equipment, wherein the second 2D photographing equipment corresponds to the outer side face of the outer frame and faces the side hole;
shooting by adopting second 2D shooting equipment to obtain a first picture, wherein the first picture comprises an image of an upper contour line and/or a lower contour line of the side hole in the Z direction on the second 2D shooting equipment and an image of the second surface on the second 2D shooting equipment, and a distance Z1 from the upper contour line and/or the lower contour line to a contour line of the image of the second surface is obtained;
arranging a 3D photographing device, wherein the 3D photographing device faces to the first surface and the second surface along the Z direction, and scanning the first surface and the second surface to obtain a Z-direction distance Z2 between the first surface and the second surface;
and obtaining the Z-position degree Z0, Z0= | Z1-Z2| of the side hole.
According to the method for detecting the position degree of the structural part side hole in the embodiment of the application, the second surface is selected as an intermediate reference, a first picture is shot towards the side hole through second 2D shooting equipment, and then the distance between the Z-direction contour line of the side hole and the second surface is obtained; scanning the first surface and the second surface through the 3D photographing equipment to obtain the Z-direction distance between the first surface and the second surface; and then the absolute value of the difference value of the distances is used as the Z-direction position degree of the side hole.
The following takes a structural member as a middle frame of a mobile phone as an example, and the exemplary description is given with reference to the accompanying drawings.
Referring to fig. 1 to 3, a middle frame 10 of a mobile phone provided in this embodiment includes an outer frame 11 and a bezel 12. The frame plate 12 is substantially a flat plate-shaped structure, the outer frame 11 surrounds the periphery of the frame plate 12, and two end faces of the outer frame 11 along the Z direction (i.e. the thickness direction of the middle frame 10) are respectively higher than the corresponding plate faces of the frame plate 12, so that the outer frame 11 and the frame plate 12 enclose two installation spaces Q1 located at two sides of the frame plate 12, one of the installation spaces Q1 is mainly used for installing a screen (not shown) of a mobile phone, and the other installation space Q1 is mainly used for installing components (not shown) such as a battery, a main board, etc. of the mobile phone.
A plurality of side holes K1 are formed in the outer side P1 of the outer frame 11, such as a volume key hole K2 for installing a volume key, a power key hole K3 for installing a power key, and a USB hole K4. Fig. 1 to 3 show a mobile phone center 10 having a substantially rectangular shape, in which a volume key hole K2 and a power key hole K3 are provided at a long side 13 of the mobile phone center 10, and a USB hole K4 is provided at a short side 14 of the mobile phone center 10.
Referring to fig. 4 and 5 in a matching manner, for the side hole K1 arranged on the long side 13, the position degrees to be controlled include the Z-position degree and the Y-position degree of the side hole K1; referring to fig. 6, for the side hole K1 disposed at the short side 14, the position degrees to be controlled mainly include the Z-position degree and the X-position degree of the side hole K1. Wherein, the X direction and the Y direction are respectively the X-axis direction and the Y-axis direction of the XY plane coordinate system, and the X axis and the Y axis are respectively vertical to the Z direction.
The XY plane coordinate system may be established based on the first reference feature 15 provided on the middle frame 10, the first reference feature 15 being fixed relative to the side hole K1 with the first reference feature 15 facing the Z direction. For example, in the present embodiment, the first reference feature 15 includes a first circular hole K5 and a second circular hole K6. Referring to fig. 2 and 7, the first circular hole K5 and the second circular hole K6 present the outlines of the first circle and the second circle on the picture when imaged in the Z direction. A connecting line L1 between the circle center O1 of the first circle and the circle center O2 of the second circle rotates around the circle center O2 of the second circle by a set angle alpha to serve as a Y axis, the direction of the circle center O1 of the first circle and perpendicular to the Y axis serves as an X axis, and the intersection point of the X axis and the Y axis serves as a coordinate origin. The set angle α of the rotation of the connecting line L1 can be determined according to the design data of the middle frame 10 of the mobile phone. Alternatively, the Y axis of the line L1 obtained after rotating the set angle α is substantially parallel to the long side 13 of the design data of the middle frame 10 of the mobile phone.
The first round hole K5 and the second round hole K6 as the reference may be important hole sites of the middle frame 10, for example, holes used for positioning and matching with other components (such as a main board) of the mobile phone, so that the position accuracy of the first round hole K5 and the second round hole K6 is controlled to be relatively accurate in the processing process of the middle frame 10. In addition, the first round hole K5/the second round hole K6 are used as a reference, so that the accurate circle center position can be obtained more easily through graphic processing, and further the XY axis and the coordinate origin position with higher precision can be obtained. Alternatively, the first circular hole K5 and the second circular hole K6 may be formed on the frame plate 12 at a slight distance from each other, for example, the two circular holes are respectively located near a set of opposite corners of the frame plate 12, and the axes thereof are along the Z direction.
In another embodiment (not shown), the XY plane coordinate system is constructed by using the long sides 13 and the short sides 14 of the outer contour of the outer frame 11 as reference features, one of the long sides 13 as the Y axis, one of the short sides 14 as the X axis, and the intersection of the X axis and the Y axis as the origin of coordinates. Compared with the aforementioned method that two circular holes (the first circular hole K5 and the second circular hole K6) are used as the reference feature, the outer contour of the outer frame 11 that is inevitably present in this embodiment can be used as the reference feature, but there is also a problem that the outer contour is prone to be not accurately and clearly imaged due to the optical characteristics (light transmittance, light reflection, etc.) of the outer contour itself or the diffraction or polishing of light at the outer contour when the outer contour is optically imaged.
In this embodiment, the position degree of the side hole K1 may include one or more of a Z-position degree, a Y-position degree, and an X-position degree.
The Z-direction position degree can be represented by the Z-direction distance of the side hole K1 relative to the Z-direction reference of the middle frame, and the smaller the error between the actual value and the designed value of the Z-direction distance is, the higher the accuracy of the Z-direction position degree is; in practice, a surface perpendicular to the Z-direction on the middle frame 10 can be used as a Z-direction reference surface of the middle frame.
The Y-direction position can be represented by the distance from the middle point of the side hole K1 arranged on the long side 13 to the X-axis; similarly, the X-direction position degree can be represented by the distance from the long-direction midpoint of the side hole K1 provided in the short side 14 to the Y-axis.
The detection methods of the X-direction position, the Y-direction position and the Z-direction position of the middle frame 10 of the mobile phone in the foregoing embodiments are described below.
Fig. 8 shows a schematic diagram of the Y-direction position measurement of the side hole K1 of the middle frame 10 of the mobile phone, where the side hole K1 is a volume key hole K2 (see fig. 1, 4 or 5) provided on the long side 13 of the middle frame.
Referring to fig. 8, the present embodiment provides a method for detecting a position degree of a structural member side hole, including the following steps:
arranging a first 2D photographing device 16 to orient the first 2D photographing device 16 in the Z direction towards the first reference feature 15 (see fig. 1 or fig. 2); for the mobile phone middle frame 10 with a substantially flat shape, the mobile phone middle frame 10 can be flatly placed on a flat table surface 17, the first 2D photographing device 16 faces downwards to correspond to the upper surface of the mobile phone middle frame 10, and the first reference feature 15 is located on the upper surface of the mobile phone middle frame 10 to form an image on the first 2D photographing device 16; optionally, the first 2D photographing Device 16 comprises a CCD camera 18 (Charge coupled Device) capable of taking a picture and deriving from the picture the dimensions between the desired features; in order to improve the photographing quality, the first 2D photographing device 16 further includes a light source system 19 for shining light on the middle frame 10 of the mobile phone; in the present embodiment, the light source system 19 includes a coaxial light source 20, an annular light source 21, and a bar light source 22; the coaxial light source 20 and the CCD camera 18 are parallel in orientation, the center of the annular light source 21 is coincident with the center of the CCD camera 18, and the orientation of the strip-shaped light source 22 is obliquely intersected with the Z direction;
arranging a reflective mirror 23, wherein the reflective mirror 23 is arranged outside the middle frame 10 of the mobile phone, and the reflective mirror 23 is obliquely arranged between the side hole K1 and the first 2D photographing device 16 and is used for reflecting the image of the side hole K1 to the first 2D photographing device 16; optionally, the reflecting surface P4 of the reflector 23 and the Z direction are 45 °, so that the image of the side hole K1 of the middle frame can be turned by 90 ° to be coplanar with the upper surface of the middle frame 10 of the mobile phone;
shooting by using the first 2D shooting device 16 to obtain a combined picture 24a; referring to fig. 7, the combined picture 24a includes a first region 25 and a second region 26, the first region 25 includes an image of the first reference feature 15 by the first 2D photographing apparatus 16, such as a first circle (circle with center O1 in fig. 7) and a second circle (circle with center O2 in fig. 7), and the second region 26 includes an image of the side hole K1 by the first 2D photographing apparatus 16 through the mirror 23; the relative position of the imaging of the side hole K1 in the second region 26 in the combined picture 24a and the imaging of the first reference feature 15 is detected as the position degree of the side hole K1. The imaging of the side hole K1 in the combined picture 24a is reflected by the reflective mirror 23, and the Y-direction relative position of the imaging of the side hole K1 in the combined picture 24a and the imaging of the first reference feature 15 is consistent with the Y-direction relative position of the side hole K1 and the first reference feature 15 in the actual structure of the mobile phone middle frame 10, so that the Y-direction position of the side hole K1 can be measured without extra graphic processing in the combined picture 24a, and the processing is simple and the result is accurate.
In the case where the aforementioned side hole K1 is oblong, a reference point 27 is taken on the imaging of the side hole K1 in the second region 26 to represent the Y-direction position of the side hole K1, and this reference point 27 can be selected as the long-direction midpoint of the imaging of the side hole K1. The distance Y0 from the long-direction midpoint to the X-axis is obtained in the combined picture 24a, which is the Y-direction position degree of the side hole K1. Referring to fig. 5, the longitudinal midpoint of the side hole K1 is obtained by first taking two longitudinal end points D1 of the side hole K1, and using a middle point of a connecting line of the two longitudinal end points D1 as the longitudinal midpoint D2 of the side hole. The position of the longitudinal midpoint D2 is obtained in the combined picture 24a as the reference point 27 of the side hole K1.
Fig. 5 also shows that when the side hole K1 is a power key hole K3, the long-direction end point D3 and the long-direction middle point D4 are taken as points.
It should be noted that the combined picture 24a includes imaging of all features of the upper surface of the structural member and imaging of all features of the side hole K1, but in other embodiments, the combined picture 24a may be formed incompletely, and only the first reference feature 15 and the side hole K1 need to be included, and other portions do not need to be imaged.
In addition, the combined picture 24a does not need to be in a visible picture form, but may be a digital picture which is stored only in a digital form, and the required size is directly obtained through numerical calculation.
Fig. 9 shows a schematic diagram of the measurement of the X-direction position degree of the side hole K1 of the middle frame 10 of the mobile phone, where the side hole K1 is the USB hole K4 provided on the short side 14 of the middle frame.
For the method for measuring the X-directional position of the USB hole K4 disposed on the short side 14 of the middle frame, the aforementioned measurement of the Y-directional position of the volume key hole K2 on the long side 13 of the middle frame 10 of the mobile phone can be referred to. Except that when measuring the X-position of the USB hole K4 on the short side 14, the mirror 23 is placed at the position corresponding to the USB hole K4, and the resulting combined picture 24b is shown in fig. 10. In the combined picture 24b, the long-direction midpoint of the image of the USB hole K4 is taken as the reference point 27, and the distance X0 from the reference point 27 to the Y axis is taken as the X-direction position degree of the USB hole K4.
Fig. 11 shows a schematic view of a side hole K1 of a middle frame 10 of a mobile phone during Z-direction position measurement, where the side hole K1 is a side hole K1 disposed on a long side 13 of the middle frame 10 or a side hole K1 disposed on a short side 14 of the middle frame, such as a volume key hole K2, a power key hole K3, a card holder hole, a USB hole K4, and the like. In fig. 11, a side hole K1 is explained as an example of a volume key hole K2 provided on the long side 13 of the center frame 10.
With reference to fig. 11, an embodiment of the present application provides a method for detecting a position degree of a structural member side hole, including:
arranging a second 2D photographing device 28, wherein the second 2D photographing device 28 corresponds to the outer side surface P1 of the outer frame 11 and faces the side hole K1; optionally, the second 2D photographing device 28 comprises a CCD camera 18, capable of taking a picture by which the dimensions between the desired features are obtained; to improve the photographing quality, the second 2D photographing apparatus 28 further includes a light source system 19 for shining light on the structural member; in the present embodiment, the light source system 19 includes a coaxial light source 20, an annular light source 21, and a bar light source 22; the coaxial light source 20 and the CCD camera 18 are parallel in orientation, the center of the annular light source 21 is coincident with the center of the CCD camera 18, and the orientation of the strip-shaped light source 22 is obliquely intersected with the Z direction;
taking a first picture by using the second 2D photographing device 28, wherein the first picture comprises an image of the upper contour line L2 and/or the lower contour line L3 (see fig. 3 and 5) of the side hole K1 in the Z direction on the second 2D photographing device 28 and an image of the second surface P2 on the second 2D photographing device 28, and obtaining a distance Z1 from the upper contour line L2 and/or the lower contour line L3 to the imaged contour line of the second surface P2 (the lower contour line L3 is taken as an example in the figure); the second surface P2 is a top surface of the outer frame 11 on one side in the Z direction, and when the middle frame 10 is placed upward, the second surface P2 is a top surface of the outer frame 11 facing upward;
referring again to fig. 1-3, the middle frame 10 is further provided with a second reference feature 30, the second reference feature 30 being located inside the outer rim 11 and having a first surface P3 perpendicular to the Z-direction. The second surface P2 is oriented to the same direction as the first surface P3, and the second surface P2 is higher than the first surface P3 along the Z direction, so that a step shape is formed between the second surface P2 and the first surface P3; optionally, the second reference feature 30 is a boss 31, the boss 31 is fixed relative to the outer frame 11, a Z-direction side surface of the boss 31 is a first surface P3, and a step is formed between the first surface P3 of the boss 31 and the second surface P2, so that the 3D photographing device 32 can easily scan and obtain a distance between the first surface P3 and the second surface P2;
arranging a 3D photographing device 32,3D and a photographing device 32 to face the first surface P3 and the second surface P2 along the Z direction, photographing to obtain a second picture, and obtaining a distance Z2 between the first surface P3 and the second surface P2 through the second picture, wherein the second picture is a 3D image comprising the first surface P3 and the second surface P2; optionally, the 3D photographing device 32 is a line laser 3D camera, which scans the first surface P3 and the second surface P2 by line laser to obtain a Z-direction distance Z2 between the first surface P3 and the second surface P2; it should be noted that the first and second images need not be in the form of visible images, but may be stored in digital form, and the desired dimensions are obtained directly by numerical calculation, and in particular, the second image may be represented as a 3D model obtained by scanning a line laser, and is used to measure the distance z2 between the first surface P3 and the second surface P2;
finally, the Z-position degree Z0 of the side hole K1 is obtained, Z0= | Z1-Z2| (| Z1-Z2| refers to the absolute value of Z1-Z2), and the calculation principle is mainly shown in fig. 3.
According to the method for detecting the position degree of the structural part side hole, the second surface P2 is selected as an intermediate reference, a first picture is shot towards the side hole K1 through the second 2D shooting equipment 28, and then the distance between the Z-direction contour line of the side hole K1 and the second surface P2 is obtained; a second picture is obtained by shooting through the 3D shooting device 32, and further the Z-direction distance between the first surface P3 and the second surface P2 is obtained; and then the absolute value of the difference value of the distances is used as the Z-direction position degree of the side hole K1, so that the method has the effect of convenient operation and accurate measurement. In addition, the detection method combines the middle reference and 2D and 3D for measurement, and solves the problem that Z-direction position boundaries (such as an upper contour line L2 or a lower contour line L3 of the side hole K1) of some side holes K1 are of inverted structures and cannot be directly measured through 3D scanning.
When the Z-direction position degree of the side hole K1 of the short side (e.g., the USB hole K4) needs to be detected, only the second 2D photographing device 28 needs to be changed to the side hole K1 on the corresponding short side, and other steps are all consistent and are not repeated herein.
The embodiment of the independent measurement of the Z-direction position degree and the independent measurement of the X/Y-direction position degree of the side hole K1 are given in the foregoing. An embodiment capable of simultaneously measuring the Z-direction position and the X/Y-direction position of the side hole K1 of the structural member is given below. The specific structure of the structural member can be seen in fig. 1-5 and the foregoing description.
Referring to fig. 12, in the present embodiment, taking the example of simultaneously measuring the Z-directional position and the X-directional position of a side hole located on a short side as an example, the method for detecting the position of the side hole of a structural member includes:
arranging a 2D photographing device 33, and enabling the 2D photographing device 33 to face the first reference feature 15 along the Z direction; the 2D photographing device 33 may be the aforementioned first 2D photographing device 16 or the second 2D photographing device 28; the first reference feature 15 may be formed by taking two circular holes as reference in the manner of the two circular holes (the first circular hole K5 and the second circular hole K6) as described above, and establishing the XY plane coordinate system as described above;
arranging a reflective mirror 23, wherein the reflective mirror 23 is arranged outside the middle frame 10, and the reflective mirror 23 is obliquely arranged between the side hole K1 and the 2D photographing equipment 33 and is used for reflecting the image of the side hole K1 to the 2D photographing equipment 33; an included angle between the reflecting surface P4 and the Z direction is 45 degrees;
referring to fig. 13, a combined picture 24c is taken by the 2D photographing device 33; the combined picture 24c comprises a first region 25 and a second region 26, the first region 25 comprising the imaging of the first reference feature 15 by the 2D photographing device 33, the second region 26 comprising the imaging of the side aperture K1 by the 2D photographing device 33 through the mirror 23; the imaging of the side hole K1 comprises imaging of an upper contour line L2 and/or a lower contour line L3 of the side hole K1 in the Z direction and imaging of the second surface P2, and a distance Z1 from the upper contour line L2 and/or the lower contour line L3 to the imaged contour line of the second surface P2 is obtained;
detecting the relative position of the imaging of the side hole K1 in the second region 26 in the combined picture 24c and the first reference feature 15 as the position degree of the side hole K1 in the plane perpendicular to the Z direction; for example, the longitudinal midpoint of the side hole K1 is taken as a reference point 27, the distance from the reference point 27 to the X axis of the XY plane coordinate system is taken as the Y position degree, and the distance from the reference point 27 to the Y axis of the XY plane coordinate system is taken as the X position degree;
arranging a 3D photographing device 32 such as a line laser camera, wherein the 3D photographing device 32 faces the first surface P3 and the second surface P2 along the Z direction, and the 3D photographing device 32 scans the first surface P3 and the second surface P2 to obtain a distance Z2 between the first surface P3 and the second surface P2; how the 3D photographing device 32 scans to obtain the distance between the two planes can be obtained by using the existing processing technology, which is not described herein;
and obtaining the Z-directional position degree Z0, Z0= | Z1-Z2| of the side hole K1.
By combining the above description, the method for detecting the position degree of the structural part side hole in the embodiment of the application can conveniently detect the position degrees of the structural part side hole K1 in the Z direction and the X/Y direction, is convenient to use and accurate in measurement, and does not damage the structural part in the measurement process. In addition, the requirement on the human skill level in the measuring process is low, the measuring efficiency is high, and the stability of the measuring result is good.
The scheme that this application embodiment provided and the scheme that adopts height gage or position degree to examine utensil detection among the prior art comprehensively contrast, the contrast of its detection efficiency, stability, damage rate and detection content is as follows shown in the table:
in the above table, GRR (Gauge Repeatability and Reproducibility of the measurement system) is used to indicate measurement stability, and the lower the value, the better the stability; when CT (cycle time) is used for detection, the smaller the value, the higher the detection efficiency. It can be seen from the table above that the mode that adopts this application embodiment to detect position degree of stability is better, efficient, and the side opening damage is minimum. In addition, in the detection mode of the embodiment for simultaneously detecting the position degrees of the side hole in the Z direction and the X/Y direction, the CT is 4s, the implementation efficiency is higher, the damage rate is lower, and the measurement stability is in a more reliable range.
It should be noted that, in addition to the middle frame of the electronic device such as the mobile phone and the tablet personal computer, the method for detecting the position of the side hole of the structural member in the embodiment may also be applied to detecting the side hole K1 of other structural members, such as machined parts, injection molded parts, cast parts, and the like having the side hole K1.
Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.
Claims (16)
1. A method for detecting the position degree of a side hole of a structural part is characterized by comprising the following steps:
the structural part comprises an outer frame, a first reference feature and a second reference feature, and the side hole is formed in the outer side face of the outer frame; the first reference feature and the side hole are fixed relatively, the first reference feature faces to a Z direction, and the Z direction is parallel to the thickness direction of the outer frame; the second datum feature is positioned on the inner side of the outer frame and provided with a first surface perpendicular to the Z direction, the outer frame is provided with a second surface, the second surface is a top surface of the outer frame on one side of the Z direction, the second surface is in the same direction as the first surface, and the second surface is higher than the first surface along the Z direction, so that a step shape is formed between the second surface and the first surface; the method for detecting the position degree of the structural part side hole comprises the following steps:
setting a 2D photographing device, and enabling the 2D photographing device to face the first reference feature along the Z direction;
arranging a reflector which is arranged on the outer side of the structural part, is obliquely arranged between the side hole and the 2D photographing equipment, and is used for reflecting the image of the side hole to the 2D photographing equipment;
shooting by adopting the 2D shooting equipment to obtain a combined picture; the combined picture comprises a first region and a second region, the first region comprises the imaging of the 2D photographing equipment on the first reference feature, and the second region comprises the imaging of the 2D photographing equipment on the side hole through a reflector; the imaging of the side hole comprises imaging of an upper contour line and/or a lower contour line of the side hole in the Z direction and imaging of the second surface, and a distance Z1 from the upper contour line and/or the lower contour line to the imaged contour line of the second surface is obtained;
detecting the relative position of the imaging of the side hole in the second region in the combined picture and the first reference feature as the position degree of the side hole in the plane perpendicular to the Z direction;
arranging a 3D photographing device, wherein the 3D photographing device faces the first surface and the second surface along the Z direction, and the 3D photographing device scans the first surface and the second surface to obtain a distance Z2 between the first surface and the second surface;
and obtaining the Z-direction position degree Z0, Z0= | Z1-Z2| of the side hole.
2. The method for detecting the position degree of the structural part side hole according to claim 1, wherein the method comprises the following steps:
the imaging of the first reference feature in the first region comprises a first circle and a second circle, the center of the first circle O1 and the center of the second circle O2 are not coincident;
constructing a straight line L1 by using the circle center O1 of the first circle and the circle center O2 of the second circle, taking the straight line L1 as a Y axis after rotating around the circle center O1 of the first circle by a set angle, and taking a straight line which passes through the circle center O2 of the second circle and is vertical to the Y axis as an X axis to construct a plane rectangular coordinate system XY;
taking a reference point on the image of the side hole in the second region;
and obtaining the distance from the reference point to the X axis as the Y-direction position degree of the side hole, and/or obtaining the distance from the reference point to the Y axis as the X-direction position degree of the side hole.
3. The structural member side hole position degree detection method according to claim 2, characterized in that:
the first reference feature comprises a first round hole and a second round hole which are formed by recessing the Z-direction side surface of the structural member, the first round hole is formed by the imaging of the 2D photographing device, and the second round hole is formed by the imaging of the 2D photographing device.
4. The structure side hole location degree detection method according to claim 2, characterized in that:
the side hole is in an oblong shape;
the method for taking the datum point comprises the following steps: and respectively taking maximum points of the imaging length directions of the two ends of the side hole in the second region, and taking the midpoint of the maximum points of the imaging length directions of the two ends as the reference point.
5. The method for detecting the position degree of the structural part side hole according to claim 1, wherein the method comprises the following steps:
the reflecting surface of the reflector and the Z direction form a 45 degree angle.
6. The structural member side hole position degree detection method according to claim 2, characterized in that:
the outer contour of the projection of the structural part in a plane vertical to the Z direction is approximately rectangular;
the Y-axis is parallel to the long or short sides of the rectangle.
7. The method for detecting the position degree of the structural part side hole according to claim 6, wherein the method comprises the following steps:
the orientation of the side hole is along the X-axis, or the orientation of the side hole is along the Y-axis.
8. The method for detecting the position degree of the structural part side hole according to claim 1, wherein the method comprises the following steps:
the 2D photographing device comprises a CCD camera.
9. The structural member side hole location degree detection method according to claim 8, characterized in that:
the 2D photographing device further comprises a light source system used for shining light on the structural part.
10. The method for detecting the position degree of the side hole in the structural member according to claim 9, wherein:
the light source system comprises a coaxial light source, an annular light source and a strip-shaped light source;
the coaxial light source is parallel to the orientation of the CCD camera, the center of the annular light source is coincided with the center of the CCD camera, and the orientation of the strip-shaped light source is obliquely intersected with the Z direction.
11. The method for detecting the position degree of the structural part side hole according to claim 1, wherein the method comprises the following steps:
the 3D photographing device is a line laser 3D camera.
12. The method for detecting the position degree of the structural part side hole according to any one of claims 1 to 11, wherein:
the second reference feature is a boss, the boss and the outer frame are relatively fixed, and the surface of one side of the boss in the Z direction is the first surface.
13. The method for detecting the position degree of the structural part side hole according to claim 12, wherein:
the structural member also comprises a frame plate, the plate surface of the frame plate is vertical to the Z direction, and the outer frame surrounds the periphery of the frame plate and is fixedly connected with the frame plate;
the boss is fixedly connected to one side of the frame plate.
14. The method for detecting the position degree of the structural part side hole according to any one of claims 1 to 13, wherein:
the structure is the center of electronic equipment, the side opening is for seting up in the volume keyhole, power key hole, card support hole or the USB hole of center side.
15. A method for detecting the position degree of a side hole of a structural part is characterized by comprising the following steps:
the structural part comprises an outer frame and a first datum feature, and the side hole is formed in the outer side face of the outer frame; the first reference feature and the side hole are fixed relatively, the first reference feature faces to a Z direction, and the Z direction is parallel to the thickness direction of the outer frame;
the method for detecting the position degree of the structural part side hole comprises the following steps:
arranging a first 2D photographing device, and enabling the first 2D photographing device to face the first reference feature along the Z direction;
arranging a reflector, wherein the reflector is arranged on the outer side of the structural part, obliquely corresponds to the position between the side hole and the first 2D photographing equipment, and is used for reflecting the image of the side hole to the first 2D photographing equipment;
shooting by adopting the first 2D shooting device to obtain a combined picture; the combined picture comprises a first picture area and a second picture area, the first picture area comprises the imaging of the first reference feature by the first 2D photographing device, and the second picture area comprises the imaging of the side hole by the first 2D photographing device through a reflector;
and detecting the relative position of the imaging of the side hole in the second region in the combined picture and the first reference feature as the position degree of the side hole.
16. A method for detecting the position degree of a side hole of a structural part is characterized by comprising the following steps:
the structural part comprises an outer frame and a second datum feature, and the side hole is formed in the outer side surface of the outer frame; the second datum feature is located on the inner side of the outer frame and has a first surface perpendicular to a Z direction, and the Z direction is parallel to the thickness direction of the outer frame; the outer frame is provided with a second surface, the second surface is a top surface of one side of the outer frame in the Z direction, the orientation of the second surface is the same as that of the first surface, and the second surface is higher than the first surface in the Z direction, so that a step shape is formed between the second surface and the first surface;
the method for detecting the position degree of the side hole of the structural part comprises the following steps:
arranging second 2D photographing equipment, wherein the second 2D photographing equipment corresponds to the outer side face of the outer frame and faces the side hole;
shooting by using the second 2D shooting device to obtain a first picture, wherein the first picture comprises imaging of the upper contour line and/or the lower contour line of the side hole in the Z direction on the second 2D shooting device and imaging of the second surface on the second 2D shooting device, and a distance Z1 from the upper contour line and/or the lower contour line to an imaged contour line of the second surface is obtained;
arranging a 3D photographing device, wherein the 3D photographing device faces the first surface and the second surface along the Z direction, and the 3D photographing device scans the first surface and the second surface to obtain a distance Z2 between the first surface and the second surface;
and obtaining the Z-position degree Z0, Z0= | Z1-Z2| of the side hole.
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