CN102303019B - Method for automatically detecting scales of injector needle cylinders by using machine vision system - Google Patents
Method for automatically detecting scales of injector needle cylinders by using machine vision system Download PDFInfo
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- CN102303019B CN102303019B CN 201110109643 CN201110109643A CN102303019B CN 102303019 B CN102303019 B CN 102303019B CN 201110109643 CN201110109643 CN 201110109643 CN 201110109643 A CN201110109643 A CN 201110109643A CN 102303019 B CN102303019 B CN 102303019B
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- 238000001514 detection method Methods 0.000 claims abstract description 29
- 239000002699 waste material Substances 0.000 claims abstract description 10
- 230000004438 eyesight Effects 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 9
- 239000000284 extract Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 4
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- 230000008034 disappearance Effects 0.000 description 18
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- 239000002184 metal Substances 0.000 description 2
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Abstract
The invention provides a method for automatically detecting scales of injector needle cylinders by using a machine vision system. The method comprises the following steps of: shooting scale pictures of a standard product to serve as scale standard pictures in advance, and storing in a computer; setting difference proportions of the scale standard pictures to be detection parameters; setting detection accuracy and qualified ranges of difference detection parameters according to requirements of users; starting a camera by using external trigger and control signals to shoot the scale pictures of the injector needle cylinders operated on line in real time, and transmitting the shot pictures to the computer for detection; processing the pictures by using the computer by a picture algorithm; extracting the scale pictures of the injector needle cylinders, and computing scale differences; and judging whether a product is a qualified product or a waste product through the computed scale differences, and eliminating the waste product from a specified material outlet through the external trigger and control signals. By the method, the scales of the injector needle cylinders can be detected at high accuracy and high speed, and the yield of the product can be effectively ensured.
Description
Technical field
The present invention relates to the technical field of utilizing NI Vision Builder for Automated Inspection to detect online, relate in particular in the scales of injector needle cylinders printing on-the-spotly, utilize NI Vision Builder for Automated Inspection whether scales of injector needle cylinders is printed the complete method that automatically detects.
Background technology
Whether the scales of injector needle cylinders printing in continuous productive process is on-the-spot, need to meet the requirements to the printing quality of injector syringe high scale and detect online.In the prior art, online detection dependence to scales of injector needle cylinders manually detects, establishing approximately on injector syringe production machine side, 80 people carry out detection and the processing of scales of injector needle cylinders, according to testing result product is divided into certified products (such as scale disappearance ratio＜10%, or scale excessively thick/meticulous ratio＜10%, and do not have other scale defectives) and defective work (such as scale disappearance ratio 〉=10%, or or scale excessively thick/meticulous ratio 〉=10%, or above other scale defectives beyond two kinds are arranged).Defective work is directly as goods rejection.
The shortcoming that manual detection exists mainly contains: the on-the-spot ventilation of workshop is poor, and workman's testing environment is abominable, and labour intensity is large; The normal eye namely can dim eyesight, the discomfort such as eye is swollen about uninterrupted observation moving object 30min, and for a long time non-stop run of testing staff can't guarantee the product export qualification rate; It is to be with very high-precision detection, human eye accurately to judge that scales of injector needle cylinders detects, and error is large, and the chance of makeing mistakes is a lot, can't guarantee to detect quality; The speed that the professional detects scales of injector needle cylinders is up to 0.5/s, and throughput rate is had very big restriction.
The content of invention
Online detection dependence to scales of injector needle cylinders manually detects for prior art, the workman easily produces visual fatigue, labour intensity is large, can't guarantee product percent of pass and detect quality, the problems such as monitoring velocity is low the invention provides a kind of NI Vision Builder for Automated Inspection to the automatic testing method of scales of injector needle cylinders, and it reduces workman's detection labour intensity greatly, accuracy of detection is high, speed is fast, the qualification rate of the product that can effectively guarantee to dispatch from the factory.
Technical scheme of the present invention is as follows:
A kind of NI Vision Builder for Automated Inspection may further comprise the steps the automatic testing method of scales of injector needle cylinders:
(1) end face with injector syringe is fixed on the frock bar anchor clamps, makes frock bar anchor clamps on-line operation, the shooting camera is fixed on frock bar anchor clamps one side of on-line operation; According to the size of injector syringe to be detected and injector syringe towards, select the focal length of camera lens, adjust shooting angle, shooting distance, aperture size, the time for exposure of taking camera, in order to obtain clearly photographic images;
(2) start described industrial camera, the pre-syringe dial chart picture of taking a standardized product, and with the image transmitting taken to computer, computer is processed by image algorithm, extract the image of scales of injector needle cylinders, this scales of injector needle cylinders image of obtaining as the scale merit image, is stored in the computer;
(3) will be made as the detection parameter with the difference ratio of scale merit image, and accuracy of detection and the acceptability limit of described detection parameter will be set according to customer requirements;
(4) computer is obtained camera and production process synchronous triggering and control signal, starts the image that described camera is taken the on-line operation scales of injector needle cylinders in real time by external trigger and control signal, and with the image transmitting taken to computer for detecting;
(5) computer is processed by image algorithm, extracts the image of scales of injector needle cylinders;
(6) computer calculates the difference ratio of described scales of injector needle cylinders image and scale merit image; This difference ratio is the ratio that accounts for this correspondence image piece area in the scale merit image in each image block in the described scales of injector needle cylinders image and the scale merit image with the area discrepancy of its correspondence image piece, get the maximum in the aforementioned proportion, the difference ratio that this ratio maximum namely is scales of injector needle cylinders;
(7) judge that by the difference ratio that calculates this product belongs to certified products or waste product, by external trigger and control signal waste product is rejected from the discharging opening of appointment.
Its further technical scheme is: to described (7) step, specifically carry out in the steps below judgement and the go-on-go of scale:
(8) whether judge scale difference ratio at acceptability limit＜10%, as then turned to for (9) step at acceptability limit, if item turned to for (10) step more than or equal to acceptability limit 〉=10%;
(9) sort as certified products;
(10) directly as goods rejection.
And its further technical scheme is: to described (7) step, when detecting product and be waste product, computer will carry out picture cues by man-machine interface, and start warning device.
Useful technique effect of the present invention is:
The present invention adopts NI Vision Builder for Automated Inspection that scales of injector needle cylinders is carried out automatic on-line and detects, and replaces manual detection, and the user can carry out the adjusting of accuracy of detection automatically.Have the record, classification, statistics, storage, the query function that product are detected certified products, this two series products of waste product.And in image, point out the defective work situation by friendly man-machine interface, and give sound, light alarm, greatly reduce workman's detection labour intensity.
Manual detection speed is generally 0.5/s, and the NI Vision Builder for Automated Inspection detection speed can reach 3 ~ 4/s, and the product detection speed of NI Vision Builder for Automated Inspection is artificial 6 ~ 8 times, has greatly improved production efficiency.
Manual detection can't uninterruptedly be carried out product quality in 24 hours and detect owing to environment and physiological reason, adopted NI Vision Builder for Automated Inspection to detect and then made it become possibility.The production time of equipment can prolong to greatest extent, has improved the utilization rate of equipment.
The artificial detection because poor, the vision fatiguability that ventilates is difficult to the Continuous Tracking product quality.Detect accuracy and guarantee by artificial being difficult to, improper defect rate generally about 8 ~ 10%, has caused the significant wastage of the resources of production and production cost; The accuracy of detection of NI Vision Builder for Automated Inspection is higher, thereby greatly improves product percent of pass and detect quality.
Description of drawings
Fig. 1 is normal syringe graduation image.
Fig. 2 is the syringe graduation image that has the scale disappearance.
Fig. 3 is the syringe graduation image that exists scale excessively thick.
Fig. 4 is process sequence diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.
Fig. 1, Fig. 2, Fig. 3 take from the injector syringe side and real image after treatment.
In Fig. 1, Fig. 2, photographic images shown in Figure 3, blank parts is the transparent space after the injector syringe image is processed through denoising software all around, shown in lines be profile, scale and digital picture after injector syringe is processed.
Embodiment 1, to there being the detection of scale disappearance product:
Scales of injector needle cylinders image as shown in Figure 2, wherein there is the scale disappearance in capable 20, the scale capable 15 of scale.
Basler ACA640-100GM type industrial camera is fixed on the side of injector syringe, camera is about 100mm apart from the distance of injector syringe side, uses to execute and bears zoom lens, and focal length transfers to 8mm, and aperture is transferred to maximum, and the time for exposure is adjusted to 0.41ms.Set the normal scale disappearance of certified products ratio and be 10% to the maximum.Adopt special-purpose White LED bowl light source, shine (positive light) from the same side of the relative injector syringe of camera, and block the impact that the metal framework shields extraneous veiling glare with semiclosed, in order to obtain visual pattern more stablely, embody the obvious characteristic of scales of injector needle cylinders.The LED bowl light source of this project uses the machine vision special light source (also can use the LED bowl light source of other companies) of CCS company, in order to can photograph clearly image more stablely, and is shown in the screen of computer.Adopt the frock bar anchor clamps on the production line that the end face of injector syringe is fixed, the end face unification that makes each injector syringe towards (owing to also being so fixing end face during at the printing scale, therefore unified end face towards, namely unified scale towards).Carry out the conveying of injector syringe by belt transmission system, guarantee that injector syringe by certain direction and speed, stably enters checkout gear.
Start described industrial camera, the pre-syringe dial chart picture of taking a standardized product, and with the image transmitting taken to computer, computer is processed by image algorithm, extract the image of scales of injector needle cylinders, this scales of injector needle cylinders image of obtaining as scale merit image (such as Fig. 1), is stored in the computer.
Computer is according to the different control systems of institute of different production firm production equipment, obtain the synchronous triggering of camera and production process and control signal, start described industrial camera and take the image of the scales of injector needle cylinders disappearance of on-line operation, and with the scales of injector needle cylinders disappearance image that obtains, be stored in the computer.
Computer carries out image to captured image by edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm to be processed, and makes image more clear, more meets the truth of scales of injector needle cylinders disappearance.The algorithm that adopts in the above-mentioned image processing process is conventional algorithm of the prior art.
Computer calculates the disappearance ratio of scales of injector needle cylinders.This disappearance ratio be in each image block in the described scale disappearance image and the scale merit image with the area discrepancy of its correspondence image piece, the ratio that accounts for the area of this correspondence image piece in the scale merit image is (capable for scale, refer in every delegation scale and the scale merit image area discrepancy with its corresponding row scale, account for the ratio of the area of this corresponding row scale in the scale merit image; For the scale numeral, refer in each scale numeral and the scale merit image area discrepancy of corresponding scale numeral with it, account in the scale merit image ratio of area that should correspondence scale numeral), get the maximum in the aforementioned proportion, this maximum namely is the disappearance ratio of scales of injector needle cylinders.
As the disappearance ratio that detects scale capable 20 is 50%, the disappearance ratio of scale capable 15 is the situation among 9%(Fig. 2); Then to get maximum be 50% to the disappearance ratio of this product, and then this product is defective work.Such as detected disappearance ratio for all less than 10%, then this product is certified products.Computer is pointed out the defective work situation by friendly man-machine interface in image, and gives sound, light alarm, and certified products are recorded, classify, add up warehouse-in.
Embodiment 2, to exist scale excessively thick/detection of meticulous product:
Scales of injector needle cylinders image as shown in Figure 3, wherein capable 1, the scale capable 2 of capable 0, the scale of scale exists scale excessively thick.
Basler ACA640-100GM type industrial camera is fixed on the side of injector syringe, camera is about 100mm apart from the distance of injector syringe side, uses to execute and bears zoom lens, and focal length transfers to 8mm, and aperture is transferred to maximum, and the time for exposure is adjusted to 0.41ms.Set the normal scale of certified products excessively thick/meticulous ratio is 10% to the maximum.Adopt special-purpose White LED bowl light source, shine (positive light) from the same side of the relative injector syringe of camera, and block the impact that the metal framework shields extraneous veiling glare with semiclosed, in order to obtain visual pattern more stablely, embody the obvious characteristic of scales of injector needle cylinders.The LED bowl light source of this project uses the machine vision special light source (also can use the LED bowl light source of other companies) of CCS company, in order to can photograph clearly image more stablely, and is shown in the screen of computer.Adopt the frock bar anchor clamps on the production line that the end face of injector syringe is fixed, the end face unification that makes each injector syringe towards (owing to also being so fixing end face during at the printing scale, therefore unified end face towards, namely unified scale towards).Carry out the conveying of injector syringe by belt transmission system, guarantee that injector syringe by certain direction and speed, stably enters checkout gear.
Start described industrial camera, the pre-syringe dial chart picture of taking a standardized product, and with the image transmitting taken to computer, computer is processed by image algorithm, extract the image of scales of injector needle cylinders, this scales of injector needle cylinders image of obtaining as scale merit image (such as Fig. 1), is stored in the computer.
Computer is according to the different control systems of institute of different production firm production equipment, obtain the synchronous triggering of camera and production process and control signal, start described industrial camera and take the excessively thick image of scales of injector needle cylinders of on-line operation, and the scales of injector needle cylinders that obtains crossed thick image, be stored in the computer.
Computer carries out image to captured image by edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm to be processed, and makes image more clear, more meets the excessively thick truth of scales of injector needle cylinders.The algorithm that adopts in the above-mentioned image processing process is conventional algorithm of the prior art.
Computer calculates the thick ratio of the mistake of scales of injector needle cylinders.This cross thick ratio be in each image block in the described scale disappearance image and the scale merit image with the area discrepancy of its correspondence image piece, the ratio that accounts for the area of this correspondence image piece in the scale merit image is (capable for scale, refer in every delegation scale and the scale merit image area discrepancy with its corresponding row scale, account for the ratio of the area of this corresponding row scale in the scale merit image; For the scale numeral, refer in each scale numeral and the scale merit image area discrepancy of corresponding scale numeral with it, account in the scale merit image ratio of area that should correspondence scale numeral), get the maximum in the aforementioned proportion, this maximum namely is the thick ratio of the mistake of scales of injector needle cylinders;
As the thick ratio of mistake that detects scale capable 0 is 20%, and the thick ratio of mistake of scale capable 1 and scale capable 2 is the situation among 8%(Fig. 2); Then to get maximum be 20% to the thick ratio of the mistake of this product, and then this product is defective work.Such as the thick ratio of detected mistake for all less than 10%, then this product is certified products.Computer is pointed out the defective work situation by friendly man-machine interface in image, and gives sound, light alarm, and certified products are recorded, classify, add up warehouse-in.
For the meticulous image of scale, its detection method and in like manner above-mentioned.
In above-mentioned two embodiment, also have other unknown scale flaw images to occur if process discovery through image algorithm, think that then this injector syringe is defective work, rejects this injector syringe as waste product.
The control system (hardware and software) of the image capture device that uses among above all embodiment (camera, radiation source, power supply, image pick-up card etc.) and storage device (hard disk, CD, floppy disk etc.), image processing equipment (hardware of image processor and software), image display (hardware and software), warning device and each part mentioned above all adopts prior art to design and produce or directly adopts relevant commercially available prod.
Above-described processing step of the present invention is shown in Fig. 4.
It should be noted that at last above-described only is preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite that does not break away from spirit of the present invention and design, all should think to be included within protection scope of the present invention.
Claims (3)
1. a NI Vision Builder for Automated Inspection is characterized in that may further comprise the steps to the automatic testing method of scales of injector needle cylinders:
(1) end face with injector syringe is fixed on the frock bar anchor clamps, makes frock bar anchor clamps on-line operation, the shooting camera is fixed on frock bar anchor clamps one side of on-line operation; According to the size of injector syringe to be detected and injector syringe towards, select the focal length of camera lens, adjust shooting angle, shooting distance, aperture size, the time for exposure of taking camera, in order to obtain clearly photographic images;
(2) start described camera, the pre-syringe dial chart picture of taking a standardized product, and with the image transmitting taken to computer, computer is processed by image algorithm, extract the image of scales of injector needle cylinders, this scales of injector needle cylinders image of obtaining as the scale merit image, is stored in the computer;
(3) will be made as the detection parameter with the difference ratio of scale merit image, and accuracy of detection and the acceptability limit of described detection parameter will be set according to customer requirements;
(4) computer is obtained camera and production process synchronous triggering and control signal, starts the image that described camera is taken the on-line operation scales of injector needle cylinders in real time by external trigger and control signal, and with the image transmitting taken to computer for detecting;
(5) computer is processed by image algorithm, extracts the image of scales of injector needle cylinders;
(6) computer calculates the difference ratio of described scales of injector needle cylinders image and scale merit image; This difference ratio is the ratio that accounts for this correspondence image piece area in the scale merit image in each image block in the described scales of injector needle cylinders image and the scale merit image with the area discrepancy of its correspondence image piece, get the maximum in the aforementioned proportion, the difference ratio that this ratio maximum namely is scales of injector needle cylinders;
(7) judge that by the difference ratio that calculates this product belongs to certified products or waste product, by external trigger and control signal waste product is rejected from the discharging opening of appointment.
2. described NI Vision Builder for Automated Inspection is characterized in that described (7) step is specifically carried out judgement and the go-on-go of scale in the steps below to the automatic testing method of scales of injector needle cylinders according to claim 1:
(8) whether judge scale difference ratio at acceptability limit＜10%, as then turn at acceptability limit (9) step, if 〉=10% turn to (10) step;
(9) sort as certified products;
(10) directly as goods rejection.
3. described NI Vision Builder for Automated Inspection is characterized in that when detecting product and be waste product, computer will carry out picture cues by man-machine interface to described (7) step, and starts warning device the automatic testing method of scales of injector needle cylinders according to claim 1.
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| CN 201110109643 CN102303019B (en) | 2011-04-29 | 2011-04-29 | Method for automatically detecting scales of injector needle cylinders by using machine vision system |
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| CN110763687A (en) * | 2019-10-30 | 2020-02-07 | 江苏理工学院 | Medical treatment cylinder syringe defect detecting device |
| CN111569191A (en) * | 2020-05-27 | 2020-08-25 | 广州市赛康尼机械设备有限公司 | Detection method, clearance inspection equipment and screw rod system |
| CN111947576A (en) * | 2020-08-19 | 2020-11-17 | 广州市赛康尼机械设备有限公司 | Method, device and system for detecting position of screw rod of labeling machine and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2280155Y (en) * | 1996-10-08 | 1998-04-29 | 辽河石油勘探局测井公司 | Graduation checking tool of sound wave well surveying instrument |
| KR20050013345A (en) * | 2003-07-28 | 2005-02-04 | 백우인 | Device for printing of injector |
| CN101424514A (en) * | 2008-12-04 | 2009-05-06 | 上海大学 | Band tape graduation on-line automatic detection system and method based on image processing |
| CN101644585A (en) * | 2008-08-06 | 2010-02-10 | 北京谊安医疗系统股份有限公司 | Detection device used for syringe putter of syringe pump |
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| CA2765559C (en) * | 2009-06-18 | 2017-09-05 | Peer Medical Ltd. | Multi-camera endoscope |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2280155Y (en) * | 1996-10-08 | 1998-04-29 | 辽河石油勘探局测井公司 | Graduation checking tool of sound wave well surveying instrument |
| KR20050013345A (en) * | 2003-07-28 | 2005-02-04 | 백우인 | Device for printing of injector |
| CN101644585A (en) * | 2008-08-06 | 2010-02-10 | 北京谊安医疗系统股份有限公司 | Detection device used for syringe putter of syringe pump |
| CN101424514A (en) * | 2008-12-04 | 2009-05-06 | 上海大学 | Band tape graduation on-line automatic detection system and method based on image processing |
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