CN102608018A - Backlight type particle counting device - Google Patents
Backlight type particle counting device Download PDFInfo
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- CN102608018A CN102608018A CN2012100801975A CN201210080197A CN102608018A CN 102608018 A CN102608018 A CN 102608018A CN 2012100801975 A CN2012100801975 A CN 2012100801975A CN 201210080197 A CN201210080197 A CN 201210080197A CN 102608018 A CN102608018 A CN 102608018A
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Abstract
The invention discloses a backlight type particle counting device, which comprises an object channel, a light source and a vidicon; the object channel is a route to be passed by an object to be measured; the light source is a line light source; the vidicon comprises a linear array CCD (charge coupled device) or a linear array CMOS (complementary metal-oxide-semiconductor transistor); the light source is arranged at one side of the object channel, and the vidicon is arranged at the other side of the object channel and is opposite to the light source; and an intersection of the object channel and a main light shaft of the vidicon is an imaging position. Compared with the prior art, the backlight type particle counting device can obtain high resolution images including recognizing particles with diameters greater than 0.1mm, can recognize shapes, namely recognize two-dimensional projection defects of three-dimensional particles and recognize fragments, and can recognize partial foreign bodies, is unlikely to take wrong judgment, and is high in reliability.
Description
[technical field]
The present invention relates to a photoelectricity number technology, relate in particular to an a kind of backlight type number device.
[background technology]
The electronics tablet counter adopts advanced PLC control technology able to programme, integrates digital technology, Modern Transducer Technology, Control Technique of Microcomputer, network technology, realizes man-machine dialog interface, convenient and reliable operation.Automatically accomplish reason bottle, counting, can, fail operations such as bottle, adaptable across the can of tablet, ball, grain, soft or hard capsule and the special-shaped sheet of medicine, chemical industry, food service industry.
According to the difference of principle of work, several technology can be divided into the three generations, and promptly mechanical several of the first generation, the electrostatic field formula number of the photoelectricity number of the second generation and the third generation.Wherein third generation static number of fields grain technology still is in development abroad; The degree of ripeness of technology and stability remain to be observed; Therefore several technology of domestic use on behalf of the master, wherein adopt the large-scale pharmacy corporation of a second generation photo-electric number technology more and more with the first generation and second.
A first generation mechanical type number technology is different according to form, the complete machine principle of work of mechanical template, can be divided into two big types of rotating disc type, crawler belt (batten) formulas again.The principle of work of mechanical type number; It is the hole slot formation template that goes up prefabricated some, size at various materials (in the majority) with stainless steel and various plastics; Medicine particle is filled on the template in the hole slot one by one, carries out medicine particle number, and the medicine of several completion is through the funnel bottling.
Advanced at present mechanical type counting grain machine, several speed can reach 200 bottles/minute, and can several precision be brought up to more than 99% through some online detection methods.Because the limitation of several know-whies of machinery, the therefore pharmaceutical production pattern of more and more incompatible modern many kinds, short run and being replaced by several more advanced technology.
Second generation photoelectricity number is at first used in developed countries such as America and Europes a technological end of the seventies in last century; One of technological core is several the sense channels that a pair of emission, receiving infrared-ray sensor are installed; When particle passes through sense channel; The infrared ray of emission sensor emission is blocked, and receiving sensor can detect the pulse change of receiving infrared-ray signal.The pulse that changes through the identification of special algorithm pulse signals, judgement, is confirmed the characteristic through particle through generally being application program and the model that is stored in the Programmable Logic Controller (PLC), can accomplish once the counting of qualified medicine or substandard products.Therefore, a photoelectricity number technology was through the development in surplus 20 years, and the pharmacy corporation in developed regions such as America and Europes has obtained using widely.
It is the up-to-date detection counting technology that is used widely present stage that photo-electric detects counting technology.It mainly is the medicine grain that the light that relies on infrared ray sensor to launch detects free-falling in sense channel that photo-electric detects counting technology; The infrared signal that receiving sensor receives is owing to the blocking of medicine grain, the time of blocking length that dropping process causes change; Detect the calculating that counting CPU changes through pulse signals, judge that the medicine grain that passes through is certified products, unacceptable product and counts and record.The great advantage that photo-electric detects counting technology is to detect the medicine particle of different shape, size and specification, and can confirm the parameter area of certified products and unacceptable product through parameter setting, guarantees the qualification rate and the accuracy rate of the medicine that counting is accomplished.
But an existing photoelectricity number technology exists following major defect, need to break through as early as possible, to satisfy the needs that pharmaceutical industry is produced:
At first be the identification and the detection problem of small sized particles.At present proven technique also can only limited detection be discerned the particle of diameter greater than 2.5mm, often can not accurate and effectively discern less than the moving particle of this size.
Next is three-dimensional detection problem.The photoelectricity counting grain machine adopts one group of photoelectric sensor, adds the motion of particle, can accomplish movement direction of object length and simply discern detection.But one group of photoelectric sensor can't be discerned three-dimensional grain defect, can't discern the tiny fragmentation on overlapping, the particle, is prone to cause the flase drop of unacceptable product.
The 3rd is the rejecting of fragment.No matter existing several technology are mechanical type or photo-electric, and the rejecting of unacceptable product all is that the whole bottle after bottling is rejected, and the single unacceptable product particle that how will identify is rejected, and is the most urgent requirement of present pharmacy corporation.
The 4th is the detection and Identification of other key element the physical dimension on the basis of the outward appearance that is based upon particle.How to discern single particle weight, particle deformation, interior containing metal or defective key elements such as other material, surface imperfection, need the new identification detection technique of exploitation.
[summary of the invention]
The technical matters that the present invention will solve provides an a kind of backlight type number device.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is that an a kind of backlight type number device comprises object passage, light source and video camera; The object passage is the path of testee process; Light source is line source and is visible light; Video camera comprises line array CCD or linear array CMOS; Light source arrangement is in a side of object passage, and camera arrangements is at the opposite side of object passage and relative with the position of light source, and light source, object passage and video camera three position constitute back lighting; The intersection point place of object passage and video camera primary optical axis is an image space.
As preferably, the spacing of light source and image space is less than the spacing of video camera and image space.
As preferably, the spacing of light source and image space is 10mm～100mm.
As preferably, also comprise first gatherer, first valve and container; First gatherer, first valve and container all are positioned at the terminal of object passage; First gatherer is a funnel-form; First valve is located between first gatherer and the container.
As preferably, first valve is located at the bottom of first gatherer.
As preferably,, also comprise second gatherer, second valve; Second gatherer is funnel-form and the below that is positioned at first valve, and second valve is between second gatherer and container.
As preferably, second valve is located at the bottom of second gatherer.
With an existing photoelectricity number compared with techniques, the invention has the beneficial effects as follows:
1, can obtain full resolution pricture: therefore can discern the particle of diameter greater than 0.1mm.
2, can realize the identification of shape: can discern two-dimensional projection's defective of three dimensional particles, the fragment that can reject this type of defective.
3, can the identification of implementation part foreign matter.
4, be difficult for erroneous judgement, reliability is high.
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is the structural representation of a backlight type number of the present invention device embodiment 1.
Fig. 2 is the structural representation of a backlight type number of the present invention device embodiment 2.
Among the figure, 1-vibrating disk, 2-object, 3-object passage, 4-line source, 5-video camera, 6-image space, 7-gatherer, 8-valve, 9-bottle, 10-gatherer, 11-valve.
[embodiment]
Embodiment 1:
Fig. 1 is an a kind of backlight type number device, involving vibrations dish 1, line source 4, video camera 5, gatherer 7, valve 8 and bottle 9.It mainly is used in particle recognition, counting, the bottling operation of pharmacy or other industry.
Video camera adopts the linear array imaging element, and just line array CCD equally also can use linear array CMOS.Adopt the advantage of linear array imaging to be that line source illumination is even, its cost is significantly less than the needed area source of equal resolution area array CCD.
When object passage 3 falls by tested object 2 the path of process.Line source 4 is arranged on the inboard of object passage, and video camera is arranged on the outside of object passage and relative with the position of line source.Object passage 3 is an image space 6 with the intersection point place of the primary optical axis of video camera 5.
The spacing of line source 4 and image space 6 is less than the spacing of video camera 5 with image space 6.
Principle of work:
Land downwards in tested object 2 (such as the medicine grain) self-vibration Moving plate 1 middle outlet place, its outlet shape limits next object that at every turn can only fall.Falling objects owing to block light source, forms a concealed wire in linear array CCD/CMOS imaging through the image space 3 between line source 4 and the video camera 5 time; Inconsistent according to transmittance, form the concealed wire of different brightness, along with object continues to move; Video camera continues sampling by specific frequency; Every once sampling obtains the picture of a line, and object through the wired order splicing of the institute of image space, both can have been obtained the picture of complete object.The pixel of each bar line is 1 * M (M is the resolution of video camera, generally in the 512-20000 scope), if sampling obtains N bar line, then the resolution of gained image is N * M.So just can obtain the actual imaging of object under the back lighting, rather than as using traditional photoelectric tube, only object made and have or not judgement.
Because illuminator adopts back lighting, the permeability that granular substance is general is all very poor, therefore can obtain the picture of the good object of contrast, is easy to mention the edge of object, carries out shape and judges.
Video camera is placed in illuminator heteropleural images acquired, when object covers light source, then forms dark picture and light source and cooperate realization back lighting imaging system.
After having obtained high-resolution image, utilize digital image processing method to carry out profile and extract, just obtain the shape of object very easily, characteristic informations such as size.According to these information, if complete particle, then counting is imperfect like fruit granule then, then judges whether to count according to size still to be particle.
Carrying out foreign matter identification based on transmitance and profile, is because different object transmitances is different.If with the different transmitance of counting particle, the brightness of the image that then obtains is inconsistent, can be judged as foreign matter in view of the above, and is same,, also can be judged as foreign matter in view of the above if shape is different with the counting particle.
In sum, present embodiment can be accomplished following function:
1. count: at first can accomplish several the most basic tally functions.
2. pile up identification: secondly, can judge piling up through image recognition, then according to piling up situation, whether tell can accuracy of judgement granule number, still it is judged as recycling again.
3. particle identification: can judge particle through image recognition, according to degree of crushing, it is qualified to judge whether, whether needs recycling.
4. foreign matter is judged: through penetrating light intensity and image recognition, and can the judgment part foreign matter.
Embodiment 2:
In Fig. 2, below valve 8, increase by a cover gatherer 10 and valve 11 again, gatherer 10 is a funnel-form, valve 11 is provided in a side of the bottom of gatherer 10, between gatherer 10 and bottle 9.
When counting beginning and counting particle do not reach when setting quantity, valve 8 is an open mode, and valve 11 is a closed condition.The counting particle passes gatherer 7 and directly falls in the gatherer 10.When the counting that reaches setting when the counting particle requires; Can estimate the time that particle falls into gatherer according to falling speed; When last material of one bottle of capacity has just got into second gatherer 10; Close the valve 8 between gatherer 7 and the gatherer 10 rapidly, open gatherer 10 following valves 11 then and begin bottling.And from the vibrating disk 1 follow-up particle that falls just by valve 8 retaining gatherer 7 in and do not influence and continue to count.Can effectively prevent like this to get in the bottle 9, but also need not interrupt counting from the vibrating disk 1 follow-up particle that falls.Therefore production efficiency is unaffected.
Need to prove that the object of indication has comprised the particle (like particle and foreign matter) that does not meet the counting requirement in embodiment 1, and the counting particle in embodiment 2 is meant the particle that coincidence counting requires.
Claims (7)
1. a backlight type number device is characterized in that, comprises object passage, light source and video camera; Said object passage is the path of testee process; Said light source is line source and is visible light; Said video camera comprises line array CCD or linear array CMOS; Said light source arrangement is in a side of object passage, and said camera arrangements is at the opposite side of object passage and relative with the position of light source, and said light source, object passage and video camera three position constitute back lighting; The intersection point place of object passage and video camera primary optical axis is an image space.
2. a backlight type number device according to claim 1 is characterized in that the spacing of said light source and image space is less than the spacing of video camera and image space.
3. a backlight type number device according to claim 2 is characterized in that the spacing of said light source and image space is 10mm～100mm.
4. according to any one described backlight type number device of claim 1-3, it is characterized in that, also comprise first gatherer, first valve and container; Said first gatherer, first valve and container all are positioned at the terminal of object passage; Said first gatherer is a funnel-form; Said first valve be located at first gatherer and container between.
5. a backlight type number device according to claim 4 is characterized in that said first valve is located at the bottom of first gatherer.
6. a backlight type number device according to claim 5 is characterized in that, also comprises second gatherer, second valve; Said second gatherer is funnel-form and the below that is positioned at first valve, and said second valve is between second gatherer and container.
7. a backlight type number device according to claim 6 is characterized in that said second valve is located at the bottom of second gatherer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100801975A CN102608018A (en) | 2012-03-16 | 2012-03-16 | Backlight type particle counting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100801975A CN102608018A (en) | 2012-03-16 | 2012-03-16 | Backlight type particle counting device |
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| CN102608018A true CN102608018A (en) | 2012-07-25 |
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| CN2012100801975A Pending CN102608018A (en) | 2012-03-16 | 2012-03-16 | Backlight type particle counting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103245670A (en) * | 2013-05-06 | 2013-08-14 | 科瑞自动化技术(深圳)有限公司 | Defect detection device and defect detection method of optical element |
| CN104458542A (en) * | 2014-12-18 | 2015-03-25 | 中电科信息产业有限公司 | Non-contact gravel aggregate grain size and grain shape detector and detection method |
| CN104590634A (en) * | 2015-01-29 | 2015-05-06 | 蒋正启 | High-speed tablet photoelectric counting machine |
| CN106053483A (en) * | 2016-06-03 | 2016-10-26 | 深圳市普盛旺科技有限公司 | Intelligent detection equipment for electronic equipment screen glass |
| CN107664611A (en) * | 2017-09-21 | 2018-02-06 | 镇江康源新材料科技有限公司 | A kind of detection means located at PVC granular material in medical use production line exit side |
| CN109635911A (en) * | 2018-11-28 | 2019-04-16 | 中山天聚自动化输送设备有限公司 | Yolk number system |
| CN113409270A (en) * | 2021-06-18 | 2021-09-17 | 深圳市宏申工业智能有限公司 | Coarse aggregate particle size distribution analysis method, device and system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245670A (en) * | 2013-05-06 | 2013-08-14 | 科瑞自动化技术(深圳)有限公司 | Defect detection device and defect detection method of optical element |
| CN103245670B (en) * | 2013-05-06 | 2015-07-22 | 深圳科瑞技术股份有限公司 | Defect detection device and defect detection method of optical element |
| CN104458542A (en) * | 2014-12-18 | 2015-03-25 | 中电科信息产业有限公司 | Non-contact gravel aggregate grain size and grain shape detector and detection method |
| CN104590634A (en) * | 2015-01-29 | 2015-05-06 | 蒋正启 | High-speed tablet photoelectric counting machine |
| CN104590634B (en) * | 2015-01-29 | 2016-09-07 | 蒋正启 | High speed tablet photoelectricity counting grain machine |
| CN106053483A (en) * | 2016-06-03 | 2016-10-26 | 深圳市普盛旺科技有限公司 | Intelligent detection equipment for electronic equipment screen glass |
| CN106053483B (en) * | 2016-06-03 | 2018-05-25 | 深圳市普盛旺科技有限公司 | Electronic equipment screen glass intelligent detection equipment |
| CN107664611A (en) * | 2017-09-21 | 2018-02-06 | 镇江康源新材料科技有限公司 | A kind of detection means located at PVC granular material in medical use production line exit side |
| CN109635911A (en) * | 2018-11-28 | 2019-04-16 | 中山天聚自动化输送设备有限公司 | Yolk number system |
| CN113409270A (en) * | 2021-06-18 | 2021-09-17 | 深圳市宏申工业智能有限公司 | Coarse aggregate particle size distribution analysis method, device and system |
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Inventor after: Jiang Fuqiang Inventor before: Han Yongjian Inventor before: Jiang Fuqiang |
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Application publication date: 20120725 |