CN102636436A - Machine vision detection device and method based on line scanning camera - Google Patents
Machine vision detection device and method based on line scanning camera Download PDFInfo
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- CN102636436A CN102636436A CN2012100690120A CN201210069012A CN102636436A CN 102636436 A CN102636436 A CN 102636436A CN 2012100690120 A CN2012100690120 A CN 2012100690120A CN 201210069012 A CN201210069012 A CN 201210069012A CN 102636436 A CN102636436 A CN 102636436A
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- scrambler
- line scan
- scan camera
- active roll
- roll tube
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Abstract
The invention provides a machine vision detection device and method based on a line scanning camera. The machine vision detection device comprises a driving roller, a first encoder and the line scanning camera, wherein the first encoder is mounted on the driving roller which rotates to drive the first encoder to generate a first encoder pulse signal; the resolution of the first encoder is K1; the encoder resolution needed to trigger the line scanning camera to capture mages is K; when the first encoder pulse signal does not meet a requirement of the resolution needed to trigger the line scanning camera to capture images, the detection device further comprises a servo motor and a second encoder; the resolution of the second encoder is K2, wherein the second encoder is mounted on the servo motor; the first encoder pulse signal triggers the servo motor to rotate; a servo motor controller enables the rotation speed ratio of the servo motor and the driving roller to be alpha, wherein alpha is equal to K1*K2/K; and the servo motor rotates to drive the second encoder to generate a second encoder pulse signal. Compared with the prior art, the machine vision detection device provided by the invention can meet the resolution requirement for triggering the line scanning camera to capture images by using existing ordinary encoders on the market, and has advantages of simple structure and low cost.
Description
Technical field
The present invention relates to the Machine Vision Detection field, particularly relate to a kind of machine vision detection device and method based on line scan camera.
Background technology
In the commercial Application of reality, usually use that the hookup wire scanning camera is the machine vision detection device of electronic eyes on printing machine, the printing quality of printed matter is carried out online detection.The typical structure of this machine vision detection device is that the camera site of line scan camera is arranged on the bus of roller, and scrambler is installed on the active roll tube.Resolution requirement according to the line scan camera images acquired; Need select the scrambler of corresponding resolution could trigger line scan camera according to roller diameter takes pictures to printed matter to be detected; But sometimes the diameter of drive roll is not the diameter in our ideal; Therefore as directly installation can need the scrambler of resolution very special (very high like resolution requirement), and this scrambler can not directly find on market, or promptly enables to find also and need pay higher cost.
Summary of the invention
Problem to the prior art existence; Fundamental purpose of the present invention is to provide a kind of cost low, and existing conventional coders just can satisfy the machine vision detection device and the method based on line scan camera of the resolution requirement that triggers the line scan camera images acquired on the use market.
Be to realize above-mentioned purpose, the invention provides a kind of embodiment of the machine vision detection device based on line scan camera.Comprise active roll tube, first scrambler and line scan camera; Product wherein to be detected places the active roll tube surface; First scrambler is installed on the active roll tube; Active roll tube produces the first encoder pulse signal through rotating drive first scrambler, and the diameter of active roll tube is d, and the resolution of first scrambler is K
1, the resolution of line scan camera images acquired is λ, triggering the needed encoder resolution of line scan camera images acquired is K,
When the first encoder pulse signal did not satisfy the resolution requirement that triggers the line scan camera images acquired, this pick-up unit also comprised the servomotor and second scrambler, and the resolution of second scrambler is K
2, wherein second scrambler is installed on the servomotor, and the first encoder pulse signal triggering servomotor rotates, and it is α that servomotor controller makes the rotating speed ratio of servomotor and active roll tube,
Servomotor produces the second encoder pulse signal through rotating drive second scrambler.The second encoder pulse signal satisfies the resolution requirement that triggers the line scan camera images acquired.
Further, this second scrambler is installed on the axle of servomotor.
Further, this pick-up unit also comprises a pressure roller, and this pressure roller contacts with product to be detected on the active roll tube, makes and does not produce relative slip between product to be detected and the active roll tube.
The present invention also provides a kind of embodiment of the machine vision detection method based on line scan camera.Use line scan camera to gather the image of product to be detected, product to be detected places on the active roll tube, and this detection method comprises the steps:
First scrambler is installed on S1, the active roll tube, and the diameter of active roll tube is d, and the resolution of first scrambler is K
1, the resolution of line scan camera images acquired is λ, triggering the needed encoder resolution of line scan camera images acquired is K,
S2, active roll tube produce the first encoder pulse signal through rotating drive first scrambler;
When the satisfied resolution requirement that triggers the line scan camera images acquired of the first encoder pulse signal, this detection method also comprises the steps:
S3, wait upon on the clothes motor second scrambler is installed, the resolution of second scrambler is K
2
S4, the first encoder pulse signal triggering are waitd upon the clothes motor and are rotated;
The clothes electric machine controller is waitd upon in S5, adjustment; Make the rotating speed of waiing upon clothes motor and active roll tube proportional; This ratio value is α,
S6, wait upon the clothes motor and produce the second encoder pulse signal through rotate driving second scrambler;
S7, the second encoder pulse signal triggering line scan camera are taken pictures to product to be detected.
Further, this second scrambler is installed on the axle of servomotor.
Further, a pressure roller is set also, this pressure roller contacts with product to be detected on the active roll tube, makes and does not produce relative slip between product to be detected and the active roll tube.
The present invention is with respect to prior art; When known existing active roll tube diameter,, can't on market, find the corresponding codes device according to the resolution requirement of line scan camera images acquired; Or the scrambler cost that needs is when very high; Increase a servomotor and scrambler, solve the unmatched problem of resolution requirement of active roll tube size, encoder resolution and line scan camera images acquired, can use that existing conventional coders just can satisfy the resolution requirement that triggers the line scan camera images acquired on the market; Simple in structure, cost is low.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the machine vision detection device based on line scan camera.
Fig. 2 is the process flow diagram of a kind of embodiment of the machine vision detection method based on line scan camera.
Figure notation in the accompanying drawing is respectively:
1: active roll tube;
2: the first scramblers;
3: servomotor;
4: the second scramblers;
5: line scan camera;
6: light source.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
As shown in Figure 1, be the structural representation of a kind of embodiment of the machine vision detection device based on line scan camera.
This machine vision detection device; Comprise active roll tube 1, first scrambler 2 and line scan camera 5; Product wherein to be detected places active roll tube 1 surface, and first scrambler 2 is installed on the active roll tube 1, and active roll tube 1 drives first scrambler, 2 generations, the first encoder pulse signal through rotating; The diameter of active roll tube 1 is d, and the resolution of first scrambler 2 is K
1, the resolution of line scan camera 5 images acquired is λ, triggering the needed encoder resolution of line scan camera 5 images acquired is K,
When the first encoder pulse signal did not satisfy the resolution requirement that triggers line scan camera 5 images acquired, this pick-up unit comprised that also the resolution of servomotor 3 and second scrambler, 4, the second scramblers 4 is K
2Wherein second scrambler 4 is installed on the axle of servomotor 3; The first encoder pulse signal that first scrambler 2 will produce is sent to servomotor 3; The first encoder pulse signal triggering servomotor 3 that sends rotates, and it is α that servomotor controller makes the rotating speed ratio between servomotor 3 and the active roll tube 1
Servomotor 3 drives second scrambler, 4 generations, the second encoder pulse signal through rotating; The second encoder pulse signal that second scrambler 4 will produce is sent to line scan camera 5, and the second encoder pulse signal of transmission satisfies the resolution requirement that triggers line scan camera 5 images acquired.
In addition, this pick-up unit also comprises light source 6 and pressure roller, and light source 6 provides illumination for line scan camera 3.Pressure roller contacts with product to be detected on the active roll tube 1, when active roll tube 1 is rotated, does not produce relative slip between product to be detected and the active roll tube 1.
As shown in Figure 2, be the process flow diagram of a kind of embodiment of the machine vision detection method based on line scan camera.This machine vision detection method uses line scan camera 5 to gather the image of product to be detected, and product to be detected places on the active roll tube 1, drives product to be detected along with the rotation of active roll tube and rotates, and this detection method comprises the steps:
S2, active roll tube 1 drive the first encoder pulse signal that first scrambler 2 produces corresponding rotating speed through rotating;
When the satisfied resolution requirement that triggers line scan camera 5 images acquired of the first encoder pulse signal, this detection method also comprises the steps:
The resolution that S3, the axle of waiing upon the clothes motor go up to be installed second scrambler, 4, the second scramblers 4 is K
2
The first encoder pulse signal that S4, first scrambler 2 will produce is sent to servomotor 3, and the first encoder pulse signal triggering of transmission is waitd upon clothes motor 3 and rotated;
The clothes electric machine controller is waitd upon in S5, adjustment; Make the rotating speed of waiing upon clothes motor 3 and active roll tube 1 proportional; This ratio value is α,
S6, wait upon clothes motor 3 and drive second scrambler 4 and produce the second encoder pulse signal through rotating;
The second encoder pulse signal that S7, second scrambler 4 will produce is sent to line scan camera 5, and 5 pairs of products to be detected of the second encoder pulse signal triggering line scan camera of transmission are taken pictures.
In addition, light source 6 and pressure roller are set also, light source 6 provides illumination for line scan camera 3.Pressure roller contacts with product to be detected on the active roll tube 1, makes between product to be detected and the active roll tube 1 and does not produce relative slip.
More than introduced a kind of machine vision detection device and method based on line scan camera.But the present invention is not limited to above embodiment, does not anyly break away from technical scheme of the present invention, promptly only it is carried out improvement or the change that those of ordinary skills knew, all belongs within protection scope of the present invention.
Claims (7)
1. machine vision detection device based on line scan camera; Comprise active roll tube, first scrambler and line scan camera; Product wherein to be detected places the active roll tube surface, and first scrambler is installed on the active roll tube, and active roll tube produces the first encoder pulse signal through rotating drive first scrambler; The diameter of active roll tube is d, and the resolution of first scrambler is K
1, the resolution of line scan camera images acquired is λ, triggering the needed encoder resolution of line scan camera images acquired is K,
It is characterized in that: when the first encoder pulse signal did not satisfy the resolution requirement that triggers the line scan camera images acquired, this pick-up unit also comprised the servomotor and second scrambler, and the resolution of second scrambler is K
2, wherein second scrambler is installed on the servomotor, and the first encoder pulse signal triggering servomotor rotates, and it is α that servomotor controller makes the rotating speed ratio of servomotor and active roll tube,
Servomotor produces the second encoder pulse signal through rotating drive second scrambler.
2. the machine vision detection device based on line scan camera as claimed in claim 1 is characterized in that: said second scrambler is installed on the axle of servomotor.
3. the machine vision detection device based on line scan camera as claimed in claim 2 is characterized in that the said second encoder pulse signal satisfies the resolution requirement that triggers the line scan camera images acquired.
4. the machine vision detection device based on line scan camera as claimed in claim 3; It is characterized in that said pick-up unit also comprises a pressure roller; Said pressure roller contacts with product to be detected on the active roll tube, makes and does not produce relative slip between product to be detected and the active roll tube.
5. the machine vision detection method based on line scan camera as claimed in claim 1 uses line scan camera to gather the image of product to be detected, and product to be detected places on the active roll tube, and said detection method comprises the steps:
First scrambler is installed on the active roll tube, and the diameter of active roll tube is d, and the resolution of first scrambler is K
1, the resolution of line scan camera images acquired is λ, triggering the needed encoder resolution of line scan camera images acquired is K,
Active roll tube produces the first encoder pulse signal through rotating drive first scrambler;
It is characterized in that when the first encoder pulse signal did not satisfy the resolution requirement that triggers the line scan camera images acquired, said detection method also comprised the steps:
Wait upon on the clothes motor second scrambler is installed, the resolution of second scrambler is K
2
The first encoder pulse signal triggering is waitd upon the clothes motor and is rotated;
The clothes electric machine controller is waitd upon in adjustment; Make the rotating speed of waiing upon clothes motor and active roll tube proportional; This ratio value is α,
Wait upon the clothes motor and produce the second encoder pulse signal through rotating drive second scrambler;
The second encoder pulse signal triggering line scan camera is taken pictures to product to be detected.
6. the machine vision detection method based on line scan camera as claimed in claim 5 is characterized in that: said second scrambler is installed on the axle of servomotor.
7. the machine vision detection method based on line scan camera as claimed in claim 6 is characterized in that also being provided with a pressure roller, and said pressure roller contacts with product to be detected on the active roll tube, makes and does not produce relative slip between product to be detected and the active roll tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210069012.0A CN102636436B (en) | 2012-03-15 | 2012-03-15 | Machine vision detection device and method based on line scanning camera |
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| CN201210069012.0A CN102636436B (en) | 2012-03-15 | 2012-03-15 | Machine vision detection device and method based on line scanning camera |
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| CN102636436A true CN102636436A (en) | 2012-08-15 |
| CN102636436B CN102636436B (en) | 2014-10-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404349A (en) * | 2016-10-14 | 2017-02-15 | 山西省交通科学研究院 | Line-scan digital camera test testing system |
| CN106645152A (en) * | 2016-12-08 | 2017-05-10 | 苏州德创测控科技有限公司 | Image collection device |
| CN106841225A (en) * | 2017-03-07 | 2017-06-13 | 浙江欧威科技有限公司 | A kind of whole machines of line-connection type AOI and the pcb board accurately image method based on the line-connection type whole machines of AOI |
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| CN2598876Y (en) * | 2003-02-11 | 2004-01-14 | 江苏南大紫金智能科技有限公司 | Ream paper packaged cutting machine |
| US20070096019A1 (en) * | 2005-10-31 | 2007-05-03 | Engelbart Roger W | Apparatus and methods for integrating encoding functions in material placement machines |
| JP2011130079A (en) * | 2009-12-16 | 2011-06-30 | Canon Inc | Image reading apparatus and method |
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| US5397276A (en) * | 1993-09-17 | 1995-03-14 | R. R. Donnelley & Sons Company | Pulse encoder resolution adjustment apparatus |
| JPH07323528A (en) * | 1994-06-02 | 1995-12-12 | Com Syst:Kk | Inspecting device for printed paper face |
| CN2598876Y (en) * | 2003-02-11 | 2004-01-14 | 江苏南大紫金智能科技有限公司 | Ream paper packaged cutting machine |
| US20070096019A1 (en) * | 2005-10-31 | 2007-05-03 | Engelbart Roger W | Apparatus and methods for integrating encoding functions in material placement machines |
| JP2011130079A (en) * | 2009-12-16 | 2011-06-30 | Canon Inc | Image reading apparatus and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404349A (en) * | 2016-10-14 | 2017-02-15 | 山西省交通科学研究院 | Line-scan digital camera test testing system |
| CN106645152A (en) * | 2016-12-08 | 2017-05-10 | 苏州德创测控科技有限公司 | Image collection device |
| CN106841225A (en) * | 2017-03-07 | 2017-06-13 | 浙江欧威科技有限公司 | A kind of whole machines of line-connection type AOI and the pcb board accurately image method based on the line-connection type whole machines of AOI |
| CN106841225B (en) * | 2017-03-07 | 2019-06-14 | 浙江欧威科技有限公司 | A kind of line-connection type AOI complete machine and the pcb board accurately image method based on line-connection type AOI complete machine |
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| CN102636436B (en) | 2014-10-22 |
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Owner name: SHENZHEN ZHONGCHAO KEXIN FINANCIAL TECHNOLOGY CO., Effective date: 20150507 Owner name: ZHONGCHAO GREATWALL FINANCIAL EQUIPMENT HOLDING CO Free format text: FORMER OWNER: SHENZHEN ZHONGCHAO KEXIN FINANCIAL TECHNOLOGY CO., LTD. Effective date: 20150507 |
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Free format text: CORRECT: ADDRESS; FROM: 518026 SHENZHEN, GUANGDONG PROVINCE TO: 100044 XICHENG, BEIJING |
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Effective date of registration: 20150507 Address after: 100044, Beijing, Xicheng District, Desheng street, No. 81, Desheng International Center, block C, 16 Patentee after: Zhongchao Greatwall Financial Equipment Holding Co., Ltd. Patentee after: Shenzhen Zhongchao Kexin Financial Technology Co., Ltd. Address before: Futian District Shenzhen City, Guangdong Province, CaiTian Road West 518026 Silver Garden Office Tower A 9 floor Patentee before: Shenzhen Zhongchao Kexin Financial Technology Co., Ltd. |