CN116858858B - Turntable workpiece tip detection device and workpiece tip coordinate calculation method - Google Patents
Turntable workpiece tip detection device and workpiece tip coordinate calculation method Download PDFInfo
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- CN116858858B CN116858858B CN202310812087.1A CN202310812087A CN116858858B CN 116858858 B CN116858858 B CN 116858858B CN 202310812087 A CN202310812087 A CN 202310812087A CN 116858858 B CN116858858 B CN 116858858B
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000004364 calculation method Methods 0.000 title claims description 10
- 239000000523 sample Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
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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
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N2021/95638—Inspecting patterns on the surface of objects for PCB's
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a detection device for the tip of a turntable workpiece, which comprises a fixed plate, a tip detection assembly, a tool setting platform and a camera, wherein the tip detection assembly is connected with the fixed plate in a sliding way through a Y-axis sliding assembly; the tip detection assembly comprises a mounting plate connected with the Y-axis sliding assembly, a rotary table vertically arranged on the mounting plate, a Z-axis base plate arranged on the rotary table, a connecting plate vertically arranged on the base plate, and a probe assembly connected with the connecting plate in a sliding manner through the Z-axis sliding assembly; the probe assembly comprises a carrier plate fixedly connected with the Z-axis sliding assembly, a chute fixedly connected with the carrier plate, a buffer block in sliding connection with the chute and a workpiece tip fixedly arranged at the lower part of the buffer block. A method for calculating the coordinates of the tip of the workpiece by the detection device is also disclosed. The invention revises the coordinates of the workpiece tip, thereby improving the detection precision of the device.
Description
Technical Field
The invention relates to the technical field of circuit board detection equipment, in particular to a turntable workpiece tip detection device and a workpiece tip coordinate calculation method.
Background
The circuit board is an important component in the information technology product, the defect inspection is needed in the production process of the circuit board, the circuit board is generally detected manually, in the detection process of the circuit board, one hand holds the circuit board, the other hand needs to hold a quick plug and a contact on the circuit board to conduct performance tests such as power on and signal transmission, and the like, but the manual detection workload is large, the efficiency is low, and the detection result is unstable. Therefore, quality inspection of circuit boards by detecting devices is gradually replacing manual inspection.
The detection device comprises a rotary table for driving the workpiece tip to rotate, and the actual circle center of the rotary table and the actual rotation circle center of the rotary table deviate due to the reasons of assembly precision and the like, so that a certain error value exists in the coordinate value of the workpiece tip, and the detection precision of the detection device is reduced.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects in the prior art, and provides a turntable workpiece tip detection device with high detection precision, and a coordinate calculation method of the workpiece tip of the detection device. In order to achieve the above purpose, the invention adopts the following technical scheme:
A detection device for the tip of a turntable workpiece comprises a fixed plate, a tip detection assembly, a tool setting platform and a camera, wherein the tip detection assembly is connected with the fixed plate in a sliding way through a Y-axis sliding assembly; the tip detection assembly comprises a mounting plate connected with the Y-axis sliding assembly, a rotary table vertically arranged on the mounting plate, a Z-axis base plate arranged on the rotary table, a connecting plate vertically arranged on the base plate, and a probe assembly connected with the connecting plate in a sliding manner through the Z-axis sliding assembly; the probe assembly comprises a carrier plate fixedly connected with the Z-axis sliding assembly, a chute fixedly connected with the carrier plate, a buffer block in sliding connection with the chute and a workpiece tip fixedly arranged at the lower part of the buffer block.
According to the technical scheme, the angle of the workpiece tip is adjusted by rotating the turntable, the position of the workpiece tip is adjusted by the Y-axis sliding assembly and the Z-axis sliding assembly, the workpiece tip can be contacted with the surface of the tool setting platform under the combined action of the Y-axis sliding assembly and the Z-axis sliding assembly, the camera is matched to record the coordinates of the workpiece tip under different angles, and the coordinate values of the workpiece tip are revised by the tool setting platform.
Preferably, a slide way is further arranged on the Z-axis backing plate, a strip-shaped sliding block is arranged in the slide way, and the sliding block is fixedly connected with the carrier plate. Plays a role in guiding, and improves the stability of the workpiece tip in the up-and-down movement process.
A workpiece tip coordinate calculation method of a turntable workpiece tip detection device comprises the following steps:
(1) Rotating the turntable for three times respectively, wherein the corresponding angles are respectively theta 1, theta 2 and theta 3, moving the workpiece tip to the position above the tool setting platform, and contacting the workpiece tip with the tool setting platform, so as to respectively measure the elongation E corresponding to the workpiece tip as a reference variable;
(2) Substituting the three groups of reference variables into a formula ① to obtain the distance W and the radial distance H between the tip of the workpiece and the vertical direction of the circle center in a conversion mode;
YH＝W*SIN(θ)+(H+E)*COS(θ) ①
In addition, the elongation E and the offset YH are calculated according to the values of one group of reference variables and W, H which are substituted into the formula ① again;
(3) And (3) correction:
a. When the reference angle is formed, the workpiece tip moves to a photographing point above a camera to acquire a camera feedback coordinate P1 (X1, Y1);
b. when the rotation angle is theta, calculating a Y-direction theoretical offset YH with a reference coordinate P1, enabling the workpiece tip to move by the distance YH, theoretically enabling the workpiece tip to move to a point P1 (X1, Y1), and obtaining a camera feedback coordinate P (X, Y) through camera shooting calculation again;
c. The error value delta P (X-X1, Y-Y1) of the actual coordinate value and the theoretical coordinate value of the workpiece tip after rotation can be obtained through the P and P1 point coordinates.
The beneficial effects of the invention are as follows:
the invention revises the coordinates of the workpiece tip, thereby improving the detection precision of the device.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a schematic structural view of a tip detection assembly;
FIG. 4 is a schematic view of a turntable at different angles of rotation;
Fig. 5 is a schematic view of the turntable at a rotation angle θ;
Fig. 6 is a schematic view of camera shooting coordinates.
In the figure: the tool setting device comprises a fixed plate 1, a tip detection assembly 2, a tool setting platform 3, a camera 4, a mounting plate 5, a rotary table 6, a base plate 7, a connecting plate 8, a carrier plate 9, a sliding chute 10, a buffer block 11, a workpiece tip 12, a sliding chute 13 and a sliding block 14.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example 1
As shown in fig. 1-3, a detecting device for the tip of a turntable workpiece comprises a fixed plate 1, a tip detecting assembly 2 which is connected with the fixed plate 1 in a sliding way through a Y-axis sliding assembly, a tool setting platform 3 and a camera 4 which are arranged below the tip detecting assembly 2, and a photographing point above the camera 4.
The tip detection assembly 2 comprises a mounting plate 5 connected with the Y-axis sliding assembly, a rotary table 6 vertically arranged on the mounting plate 5, a Z-axis base plate 7 arranged on the rotary table 6, a connecting plate 8 vertically arranged on the base plate 7, and a probe assembly in sliding connection with the connecting plate 8 through the Z-axis sliding assembly. The probe assembly comprises a carrier plate 9 fixedly connected with the Z-axis sliding assembly, a chute 10 fixedly connected with the carrier plate 9, a buffer block 11 slidingly connected with the chute 10 and a workpiece tip 12 fixedly arranged at the lower part of the buffer block 11.
The Z-axis cushion plate 7 is also provided with a slide way 13, a strip-shaped sliding block 14 is arranged in the slide way 13, the sliding block 14 is fixedly connected with the carrier plate 9, and the sliding block 14 slides along the slide way 13 together with the probe assembly in the up-and-down sliding process, so that the probe assembly plays a role in guiding and limiting.
The workpiece tip 12 moves left and right along with the Y-axis sliding assembly, can rotate in an angle along with the turntable 6, can move up and down along with the Z-axis sliding assembly, enables the workpiece tip 12 to be in contact with the upper surface of the tool setting platform 3 through the adjustment, and records the coordinates of the workpiece tip 12 under different angles through the camera 4.
The Y-axis sliding component and the Z-axis sliding component are of conventional sliding structures, such as a linear guide rail sliding table. The turntable is also the existing equipment, and the control mode, the installation mode and the working mode of the turntable are all conventional modes.
The device elements in the above embodiments are conventional device elements unless otherwise specified, and the structural arrangement, operation or control modes in the embodiments are conventional arrangement, operation or control modes in the art unless otherwise specified.
Example 2
A workpiece tip coordinate calculation method of a turntable workpiece tip detection device comprises the following steps:
(1) Rotating the turntable for three times respectively, wherein the corresponding angles are respectively theta 1, theta 2 and theta 3, as shown in fig. 4, moving the workpiece tip to the position above the tool setting platform, and mutually contacting the workpiece tip and the tool setting platform to respectively measure the corresponding elongation E of the workpiece tip as a reference variable;
(2) Substituting the three groups of reference variables into a formula ① to obtain the distance W and the radial distance H between the tip of the workpiece and the vertical direction of the circle center in a conversion mode;
YH＝W*SIN(θ)+(H+E)*COS(θ) ①
Substituting θ1, θ2, θ3 respectively, yh=w+sin (θ1) + (h+e1) COS (θ1) ②YH＝W*SIN(θ2)+(H+E2)*COS(θ2) ③
YH＝W*SIN(θ3)+(H+E3)*COS(θ3) ④
②-③ And ②-④ to obtain
As can be derived from formulas ① and ②,
E＝(W*SIN(θ1)+(H+E1)*COS(θ1)-W*W*SIN(θ))/COS(θ)-H
As can be seen from the figure 5 of the drawings,
Ab=oa-ob, where oa=w×cos (θ), ob=w×cos (θ1);
YH＝cd＝ab+bd-ac＝oa-ob+bd-ac，bd＝(H+E1)*SIN(θ1)，
ac＝(H+E)*SIN(θ))；
Thus, it follows that,
Yh=w COS (θ) -W COS (θ1) + (h+e1) ×sin (θ1) - (h+e) ×sin (θ) (3) correction:
a. At the reference angle, the workpiece tip moves to a photographing point above the camera, and a camera feedback coordinate P1 (X1, Y1) is obtained, as shown in fig. 6;
b. When the rotation angle is theta, calculating a Y-direction theoretical offset YH with a reference coordinate P1, enabling the workpiece tip to move by the distance of YH, theoretically enabling the workpiece tip to move to a point P1 (X1, Y1), and obtaining a camera feedback coordinate P (X, Y) through camera shooting calculation again;
c. The error value delta P (X-X1, Y-Y1) of the actual coordinate value and the theoretical coordinate value of the workpiece tip after rotation can be obtained through the P and P1 point coordinates.
Therefore, the error value generated in the rotating process of the tip of the workpiece can be calculated, and the detection precision of the device is improved. Finally, it is noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and that other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (3)
1. The detecting device for the tip of the turntable workpiece is characterized by comprising a fixed plate, a tip detecting assembly, a tool setting platform and a camera, wherein the tip detecting assembly is connected with the fixed plate in a sliding way through a Y-axis sliding assembly;
the tip detection assembly comprises a mounting plate connected with the Y-axis sliding assembly, a rotary table vertically arranged on the mounting plate, a Z-axis base plate arranged on the rotary table, a connecting plate vertically arranged on the base plate, and a probe assembly connected with the connecting plate in a sliding manner through the Z-axis sliding assembly; the probe assembly comprises a carrier plate fixedly connected with the Z-axis sliding assembly and a probe assembly
The support plate is fixedly connected with the sliding groove, the buffer block which is in sliding connection with the sliding groove and the workpiece tip which is fixedly arranged at the lower part of the buffer block.
2. The detecting device for the tips of the turntable workpieces according to claim 1, wherein a slide way is further arranged on the Z-axis backing plate, a strip-shaped sliding block is arranged in the slide way, and the sliding block is fixedly connected with the carrier plate.
3. A workpiece tip coordinate calculation method of a turntable workpiece tip detection device as claimed in claim 1 or 2, comprising the steps of:
(1) Rotating the turntable for three times respectively, wherein the corresponding angles are respectively theta 1, theta 2 and theta 3, moving the workpiece tip to the position above the tool setting platform, and contacting the workpiece tip with the tool setting platform, so as to respectively measure the elongation E corresponding to the workpiece tip as a reference variable;
(2) Substituting the three groups of reference variables into a formula ① to obtain the distance W and the radial distance H between the tip of the workpiece and the vertical direction of the circle center in a conversion mode;
YH＝W*SIN(θ)+(H+E)*COS(θ) ①
In addition, the elongation E and the offset YH are calculated according to the values of one group of reference variables and W, H which are substituted into the formula ① again;
(3) And (3) correction:
a. When the reference angle is formed, the workpiece tip moves to a photographing point above a camera to acquire a camera feedback coordinate P1 (X1, Y1);
b. When the rotation angle is theta, calculating a Y-direction theoretical offset YH with a reference coordinate P1, enabling the workpiece tip to move by the distance of YH, theoretically enabling the workpiece tip to move to a point P1 (X1, Y1), and obtaining a camera feedback coordinate P (X, Y) through camera shooting calculation again;
c. The error value delta P (X-X1, Y-Y1) of the actual coordinate value and the theoretical coordinate value of the workpiece tip after rotation can be obtained through the P and P1 point coordinates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310812087.1A CN116858858B (en) | 2023-07-04 | 2023-07-04 | Turntable workpiece tip detection device and workpiece tip coordinate calculation method |
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| CN202310812087.1A CN116858858B (en) | 2023-07-04 | 2023-07-04 | Turntable workpiece tip detection device and workpiece tip coordinate calculation method |
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| CN116858858B true CN116858858B (en) | 2024-05-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223389A (en) * | 2015-09-28 | 2016-01-06 | 大族激光科技产业集团股份有限公司 | A kind of alignment method of flying probe tester |
| CN105513990A (en) * | 2015-12-07 | 2016-04-20 | 杭州长川科技股份有限公司 | Probe station image positioning device and vision alignment method |
| CN114137386A (en) * | 2021-11-10 | 2022-03-04 | 河南裕展精密科技有限公司 | Test device, test method and test equipment |
| CN114460442A (en) * | 2022-02-09 | 2022-05-10 | 苏州格拉尼视觉科技有限公司 | High-precision needle-off compensation method and device for flying needle test and storage medium |
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- 2023-07-04 CN CN202310812087.1A patent/CN116858858B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223389A (en) * | 2015-09-28 | 2016-01-06 | 大族激光科技产业集团股份有限公司 | A kind of alignment method of flying probe tester |
| CN105513990A (en) * | 2015-12-07 | 2016-04-20 | 杭州长川科技股份有限公司 | Probe station image positioning device and vision alignment method |
| CN114137386A (en) * | 2021-11-10 | 2022-03-04 | 河南裕展精密科技有限公司 | Test device, test method and test equipment |
| CN114460442A (en) * | 2022-02-09 | 2022-05-10 | 苏州格拉尼视觉科技有限公司 | High-precision needle-off compensation method and device for flying needle test and storage medium |
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Effective date of registration: 20240328 Address after: 450000 F11, Comprehensive Bonded Zone on the East Side of Chang'an Road, Hanggang District, Zhengzhou City, Henan Province Applicant after: Henan Fuchi Technology Co.,Ltd. Country or region after: China Address before: 450000 No. 9, Zone D, intelligent terminal (mobile phone) Industrial Park, Huaxia Avenue and Donghai Road, HANGGANG District, Zhengzhou City, Henan Province Applicant before: Henan Zhongchi Fulian Precision Technology Co.,Ltd. Country or region before: China |
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