CN201986037U - Imaging device - Google Patents
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- CN201986037U CN201986037U CN2011200342602U CN201120034260U CN201986037U CN 201986037 U CN201986037 U CN 201986037U CN 2011200342602 U CN2011200342602 U CN 2011200342602U CN 201120034260 U CN201120034260 U CN 201120034260U CN 201986037 U CN201986037 U CN 201986037U
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- imaging device
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Abstract
The utility model relates to an imaging device, which is used for high-speed color detection and comprises a light source device, a camera device, a data collection and processing device and a synchronizing device, wherein the light source device comprises a plurality of light emitting diodes with different light colors, the camera device is connected with the data collection and processing device through signals, the synchronizing device is used for synchronously sending high-frequency control signals to the light source device and the camera device and is used for controlling the light emitting diodes with different light colors of the light source device to sequentially and cyclically flicker and to maintain the consistency with the shooting action of the camera device, the camera device sends shot images to the data collection and processing device for carrying out synthesizing processing, and color images are obtained. When the imaging device is used for colored imaging, the cost is low, the imaging effect is good, and the imaging device is applicable to high-speed shooting and detection.
Description
[technical field]
The relevant a kind of imaging device of the utility model, particularly a kind of field of machine vision that is applicable to is used for the imaging device of high-speed camera.
[background technology]
In high speed machines vision field, along with popularizing and development of colored printing technology, people are also more and more higher to the requirement of color detection, and this just causes the consumption of industrial 3CCD color camera unprecedented soaring in recent years.But the high price of 3CCD color camera also allows numerous enterprises forget and step back, and how can obtain the coloured image of better quality with lower cost, becomes a stubborn problem.
[utility model content]
Therefore, be necessary to provide the color image forming apparatus that a kind of cost is low and image quality is high.
A kind of imaging device, being used for high-speed color detects, comprise a light supply apparatus, one camera apparatus, one data acquisition and processing unit, one installs synchronously, this light supply apparatus comprises several different photochromic light-emitting diodes, this camera apparatus is connected with data acquisition and processing unit signal, this synchronizer is used for to light supply apparatus and camera apparatus synchronized transmission high-frequency controling signal, the different photochromic light-emitting diode that is used to control this light supply apparatus flicker that circulates successively, and be consistent with the shooting of camera apparatus action, the image after this camera apparatus will be taken sends to data acquisition and processing unit and synthesizes processing and obtain coloured image.
Adopt above-mentioned imaging device to carry out colour imaging, cost is low, imaging effect good, and is applicable to high-speed capture and detection.
[description of drawings]
Fig. 1 is the composition diagram and the work schematic diagram of the imaging device of the utility model one embodiment.
Fig. 2 is that the LED of led light source among Fig. 1 arranges schematic diagram.
Fig. 3 is the workflow schematic diagram of subelement among Fig. 1.
Fig. 4 carries out the schematic diagram that coloured image merges for the imaging device among Fig. 1 adopts even duration Exposure mode.
Fig. 5 carries out the schematic diagram that coloured image merges for the imaging device among Fig. 1 adopts non-homogeneous duration Exposure mode.
Fig. 6 adopts the job step figure that imaging device carries out colored detection among Fig. 1.
[embodiment]
Figure 1 shows that the imaging device 100 of the utility model one embodiment, this imaging device 100 comprises that one installs 10, one light supply apparatus 20, a camera apparatus 30, a data acquisition and a processing unit 50 and an industrial computer 70 synchronously.
Please consult Fig. 3 simultaneously, this synchronizer 10 comprises an encoder 11 and a trigger 13, and this encoder 11 is used to measure the object under test movement velocity, and converts velocity information to pulse signal; But the pulse signal of these trigger 13 received code devices 11 is also handled according to application need, amplifies exponentially or dwindles such as the frequency of pulse signals; This trigger 13 communicates with light supply apparatus 20 and camera apparatus 30 and is connected.
This light supply apparatus 20 comprises a light source controller 22 and a led light source 25 (LED is light-emitting diode), but these light source controller 22 received pulse signals, and can produce the flicker frequency that control signal corresponding is controlled led light source 25 according to signal frequency.
See also Fig. 2, this led light source 25 is a RGB linear light sorurce, promptly this led light source 25 comprises several high-power red LED 251, green LED 252, blue led 253, these LED251,252,253 are according to the linear successively arrangement of the order of red/green/Lan Sanse, so this light supply apparatus 10 is fit to and industrial line-scan digital camera cooperating.This led light source 25 can send three kinds of light of red, green, blue under the control of light source controller 22 high-frequency signals successively in the extremely short time, the flash speed of this led light source 25 need adapt with the shooting speed of camera apparatus 30, be 6～80,000 times/second generally speaking, in addition higher.The LED that this led light source 25 adopts is not limited to red, green, blue three looks, in other embodiments, also can adopt other different photochromic LED to make up.
This camera apparatus 30 adopts Mysticum white line array camera, requirement to this camera apparatus 30 is resolution height, strong interference immunity, shooting speed and data transmission bauds also have higher requirements in addition, generally speaking, the shooting speed of this camera apparatus requires to reach for 6～80,000 line/seconds, and can continue the shooting long period with so high-speed.The shooting speed of this camera apparatus 30 is fast more, can adapt to the application of high speed situation more.
This data acquisition and processing unit 50 adopt the capture card of hardware mode, owing to adopted hardware mode, but this data acquisition and processing unit 50 high speed processing mass data, data volume such as 160M/s (9.6G/min), and can under the situation that need not the outer CPU resource, finish functions such as data acquisition, flat field correction, white balance, linear interpolation, data fusion apace.
This imaging device 100 is arranged near the conveyer belt 80, is used for that swiftly passing object on this conveyer belt 80 is carried out colour and takes and monitor.
The encoder 11 of this synchronizer 10 is installed on the roller bearing of conveyer belt 80, is used for converting the velocity information of conveyer belt 80 to pulse signal, is input in the trigger 13; This trigger 13 communicates to connect with the light source controller 22 and the camera apparatus 30 of light supply apparatus 20 respectively.Because the flash speed of this light supply apparatus 20 and the shooting speed of camera apparatus 30 are determined by the pulse signal frequency that trigger 13 sends, so trigger 13 is handled according to the frequency of application need pulse signals light supply apparatus 20 and camera apparatus 30.For example, rotating speed, image resolution ratio requirement according to conveyer belt 80, the flash speed of light supply apparatus 20 and the shooting speed of camera apparatus 30 then there is corresponding specific (special) requirements, at this moment flash speed that reaches as required and shooting speed, frequency by trigger 13 pulse signals is handled, and makes light supply apparatus 20 and camera apparatus 30 are realized that the signal frequency of Synchronization Control can meet the demands.
The led light source 25 of this light supply apparatus 20 and camera apparatus 30 are installed on the top of conveyer belt 80.This led light source 25 places the left and right sides of conveyer belt 80 and relative with conveyer belt 80, this camera apparatus 30 place conveyer belt 80 directly over, the camera lens of this camera apparatus 30 is relative with the end face of conveyer belt 80.This led light source 25 is positioned at same plane with camera apparatus 30, and this plane is vertical with the bearing of trend of conveyer belt 80.
This camera apparatus 30 communicates to connect with data acquisition and processing unit 50.
This data acquisition and processing unit 50 communicate to connect with industrial computer 70.
See also Fig. 6, the workflow that this imaging device 100 is used for industrial detection is as follows:
S1: measure rotating speed: this synchronizer 10 is measured the rotating speed of conveyer belt 80 and is converted high-frequency signal to, such as 80KHz;
According to the needs of shooting speed, the frequency range of this high-frequency signal is generally several ten thousand to hundreds thousand of hertz;
S2: send synchronizing signal: this synchronizer 10 sends to light source controller 22 and camera apparatus 30 with high-frequency signal;
S3a: light source scintillation: after light source controller 22 received the high-frequency signal of synchronizer 10, circulating successively towards conveyer belt 80 directions in the extremely short time according to signal frequency control led light source 25 irradiated ruddiness, green glow and blue light;
S3b: take pictures: after camera apparatus 30 receives the high-frequency signal of synchronizer 10, take pictures towards conveyer belt 80 directions in the extremely short time according to signal frequency, the frequency of its shooting is consistent with the flicker frequency of led light source 25, promptly this camera apparatus 30 can be respectively when led light source 25 sends red, green, blue three coloured light lines successively to difference the object on the conveyer belt 80 under photochromic take;
S4: data processing: camera apparatus 30 sends the photo of taking to data acquisition and processing unit 50, this data acquisition and processing unit 50 synthesize processing to the image under three red, green, blue coloured light lines in the adjacent time under high speed situations, handling by image processing methods such as flat field correction, white balance, linear interpolation, data fusion, is a coloured image with these three image co-registration;
When carrying out the coloured image fusion, can adopt following two kinds of methods:
A kind of is the mode of even duration exposure: promptly the exposure interval of three kinds of light sources of red, green, blue is identical, this mode generally all needs " linear interpolation ", be that whenever to adopt a line all be monochrome image to camera apparatus 30, such as the image under redness or green or the blue ray, if will obtain coloured image, must add other images under photochromic, two kinds of colors that the method for at this moment available " interpolation " obtains being left.See also Fig. 4, the left side is " interpolation " preceding situation among Fig. 4, and the right is the image after " interpolation ", has just become coloured image after the interpolation.
Another is the mode of non-homogeneous duration exposure, this mode is simpler, it is very short to be that each organizes the exposure interval of three kinds of light sources of inner red, green, blue, gather three kinds of images under the light simultaneously, directly three lines are superimposed together, become the red green blue image that adds that adds, can remedy " space potential difference " like this, the image that feasible shooting is come out more can reflect reality, referring to Fig. 5.But this mode also has shortcoming, and the image resolution ratio that promptly obtains does not have first kind of mode height.
S5: show and storage: data acquisition and processing unit 50 output to synthetic coloured image on the industrial computer 70.
Owing to adopted synchronizer 10, can guarantee light supply apparatus 20 and camera apparatus 30 collaborative work under high speed, promptly in moment that camera apparatus 30 is taken pictures at every turn, red light in the led light source 25, green light or blue light can synchronously glimmer once, in the extremely short time, realize different photochromic conversions, thereby make camera apparatus 30 (for example 10us) in the extremely short time to expose.
Suppose:
(1) resolution requirement to image is 0.15mm
(2) rotating speed of conveyer belt 80 is 180m/min (3m/s)
(3) time for exposure of this camera apparatus 30 is 10us, and its shooting speed was about for 60,000～80,000 line/seconds, and the flash speed of this light supply apparatus 20 is consistent with the camera shooting speed, is 60,000～80,000 times/second
The space potential difference that then adopts imaging device 100 to produce is as follows:
0.01ms*3m/s＝0.03mm
This space potential difference only is 20% of image resolution ratio 0.15mm, if adopt methods such as linear interpolation to remedy again, its influence can be ignored substantially.
Owing to adopted great power LED, the light that led light source 25 sends can satisfy the demand of super brightness.By the light intensity and the uniformity of further increase led light source 25, can avoid causing the uneven problem of irradiate light because of the kinetic fluctuation of the objects at high speed on the conveyer belt 80.
Hardware mode such as the data acquisition of imaging device 100 of the present utility model and processing unit 50 employing capture cards realize that the advantage of following several respects is arranged:
1. friendly: covered details such as bottom layer treatment, seen with the general industry color camera that from user perspective without any difference, it is extremely convenient to use;
2. high speed: can promote processing speed greatly with the independent realization of hardware, satisfy demand at a high speed.
Adopt imaging device 100 of the present utility model very nearly the same with the 3CCD color camera aspect imaging effect, but cost can descend greatly.Following table is listed the index contrast of these two kinds of cameras.
| Camera type | Imaging effect | Cost |
| The 3CCD color camera | Good | |
| Imaging device | ||
| 100 | Good | Low |
In sum, adopt imaging device 100 of the present utility model to carry out color detection and have following advantage:
1. cost is low, and price is far below 3CCD color camera of the same type.
2. imaging effect is good, need not filter, and color of image is true to nature, saturation is big, and image quality is far above the Bayer Filter Pattern color camera with price.
3. applicable to high-speed capture and detection.
The time for exposure of traditional area array cameras is generally 500us; The speed of supposing conveyer belt 80 is 3m/s (180m/min), and the color detection image resolution ratio requires to be 0.15mm, can calculate the space potential difference that adopts area array cameras and annular light source to take two images that obtain according to above hypothesis and be about:
0.5ms*3m/s＝1.5mm
This space potential difference is far longer than the resolution 0.15mm of requirement, so image can't synthesize, can not satisfy the detection requirement.
Though this patent is described with reference to current better embodiment; but those skilled in the art will be appreciated that; above-mentioned better embodiment only is used for illustrating this patent; it is not the protection range that is used for limiting this patent; any within the spirit and principle scope of this patent; any modification of being done, equivalence replacement, improvement etc. all should be included within the rights protection scope of this patent.
Claims (10)
1. imaging device, being used for high-speed color detects, comprise a light supply apparatus, one camera apparatus and a data acquisition and processing unit, this light supply apparatus comprises several different photochromic light-emitting diodes, this camera apparatus is connected with data acquisition and processing unit signal, it is characterized in that: comprise that also one installs synchronously, this synchronizer is used for to light supply apparatus and camera apparatus synchronized transmission high-frequency controling signal, the different photochromic light-emitting diode that is used to control this light supply apparatus flicker that circulates successively, and be consistent with the shooting of camera apparatus action, the image after this camera apparatus will be taken sends to data acquisition and processing unit and synthesizes processing and obtain coloured image.
2. imaging device as claimed in claim 1, it is characterized in that: this light supply apparatus comprises a light source controller and a led light source, this light source controller is used for the received pulse signal, and can produce the flicker frequency of control signal corresponding control led light source according to signal frequency.
3. imaging device as claimed in claim 2 is characterized in that: described light-emitting diode is positioned on this led light source, and light-emitting diode is respectively red, green, blue three looks, and these light-emitting diodes are according to the linear successively arrangement of the order of red/green/Lan Sanse.
4. imaging device as claimed in claim 3 is characterized in that: this camera apparatus is a Mysticum white line array camera.
5. imaging device as claimed in claim 1 is characterized in that: this data acquisition and processing unit adopt the capture card of hardware mode.
6. imaging device as claimed in claim 1 is characterized in that: this synchronizer comprises an encoder and a trigger, and this encoder is used to measure the object under test movement velocity, and converts velocity information to pulse signal; This trigger is used for the pulse signal of received code device and handles, and this trigger is connected with communicating with light supply apparatus and camera apparatus respectively.
7. as any described imaging device of claim 1 to 5, it is characterized in that: also comprise an industrial computer, this data acquisition and processing unit and industrial computer communicate to connect.
8. as any described imaging device of claim 1 to 5, it is characterized in that: the frequency of described high-frequency controling signal is several ten thousand to hundreds thousand of hertz.
9. as any described imaging device of claim 1 to 5, it is characterized in that: the shooting speed of described camera apparatus reached for 6～80,000 line/seconds, and the flash speed of light-emitting diode reaches 6～80,000 times/second.
10. as any described imaging device of claim 1 to 5, it is characterized in that: this light supply apparatus and camera apparatus are when using installation, the light source of this light supply apparatus places the left and right sides of object under test moving line and relative with object, this camera apparatus place the object under test moving line directly over, this light source and camera apparatus are positioned at same plane, and this plane is vertical with the object under test moving line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011200342602U CN201986037U (en) | 2011-02-01 | 2011-02-01 | Imaging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200342602U CN201986037U (en) | 2011-02-01 | 2011-02-01 | Imaging device |
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| CN201986037U true CN201986037U (en) | 2011-09-21 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192729A (en) * | 2011-02-01 | 2011-09-21 | 深圳市中钞科信金融科技有限公司 | Imaging system and imaging method |
| CN103561208A (en) * | 2013-10-12 | 2014-02-05 | 浙江大学 | Active imaging method and system based on synchronous triggering of LED and camera |
| CN104007122A (en) * | 2014-04-30 | 2014-08-27 | 楚天科技股份有限公司 | Cylindrical object lateral surface detection device and method based on turntable type assembly line |
| CN104134190A (en) * | 2014-07-11 | 2014-11-05 | 华南理工大学 | Method for separating dynamic image from mixed light |
| CN105657930A (en) * | 2014-10-30 | 2016-06-08 | 金宝电子工业股份有限公司 | Light emitting element driving circuit and method thereof |
| CN106645152A (en) * | 2016-12-08 | 2017-05-10 | 苏州德创测控科技有限公司 | Image collection device |
| CN111479077A (en) * | 2020-06-22 | 2020-07-31 | 深圳市中钞科信金融科技有限公司 | Infrared excitation imaging device |
| CN114979427A (en) * | 2022-03-30 | 2022-08-30 | 天津大学 | High-speed synchronous stroboscopic rotor blade tip image acquisition device and method |
-
2011
- 2011-02-01 CN CN2011200342602U patent/CN201986037U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192729A (en) * | 2011-02-01 | 2011-09-21 | 深圳市中钞科信金融科技有限公司 | Imaging system and imaging method |
| CN102192729B (en) * | 2011-02-01 | 2015-11-25 | 深圳市中钞科信金融科技有限公司 | Imaging system and formation method |
| CN103561208A (en) * | 2013-10-12 | 2014-02-05 | 浙江大学 | Active imaging method and system based on synchronous triggering of LED and camera |
| CN104007122A (en) * | 2014-04-30 | 2014-08-27 | 楚天科技股份有限公司 | Cylindrical object lateral surface detection device and method based on turntable type assembly line |
| CN104007122B (en) * | 2014-04-30 | 2016-07-06 | 楚天科技股份有限公司 | Cylinder body side surface detecting device and method based on rotating disc type streamline |
| CN104134190A (en) * | 2014-07-11 | 2014-11-05 | 华南理工大学 | Method for separating dynamic image from mixed light |
| CN105657930A (en) * | 2014-10-30 | 2016-06-08 | 金宝电子工业股份有限公司 | Light emitting element driving circuit and method thereof |
| CN106645152A (en) * | 2016-12-08 | 2017-05-10 | 苏州德创测控科技有限公司 | Image collection device |
| CN111479077A (en) * | 2020-06-22 | 2020-07-31 | 深圳市中钞科信金融科技有限公司 | Infrared excitation imaging device |
| CN114979427A (en) * | 2022-03-30 | 2022-08-30 | 天津大学 | High-speed synchronous stroboscopic rotor blade tip image acquisition device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110921 Effective date of abandoning: 20151125 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |