CN102303019A - 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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- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000007689 inspection Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 10
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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 utilize NI Vision Builder for Automated Inspection to carry out the technical field of online detection, relate in particular to, utilize NI Vision Builder for Automated Inspection whether the injector syringe scale is printed the complete method that detects automatically at injector syringe scale printing scene.
Background technology
Whether the injector syringe scale printing in continuous productive process is on-the-spot, need meet the requirements to the printing quality of injector syringe high scale and carry out online detection.In the prior art; Online detection to the injector syringe scale relies on manual work to detect; Produce the machine side at injector syringe and establish detection and the processing that about 80 people carry out the injector syringe scale; According to testing result product is divided into certified products (like scale disappearance ratio＜10%; Or scale thick excessively/meticulous ratio＜10%; And do not have other scale defectives) and defective work (like scale disappearance ratio >=10%; Or or scale thick excessively/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 big; The normal eye promptly can dim eyesight, eye discomfort such as expand about uninterrupted observation moving object 30min, and testing staff's non-stop run for a long time can't guarantee the product export qualification rate; It is to be with very high-precision test that the injector syringe scale detects, and human eye can't judge accurately that error is big, and the chance of makeing mistakes is a lot, can't guarantee to detect quality; The speed that the professional detects the injector syringe scale is up to 0.5/s, and throughput rate is had very big restriction.
The content of invention
Online detection dependence manual work to the injector syringe scale detects to prior art; The workman is easy to generate visual fatigue; Labour intensity is big; Can't guarantee product percent of pass and detect quality; Problems such as monitoring velocity is low, the present invention provides the automatic testing method of a kind of NI Vision Builder for Automated Inspection to the injector syringe scale, 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 following:
A kind of NI Vision Builder for Automated Inspection may further comprise the steps the automatic testing method of injector syringe scale:
(1) end face with injector syringe is fixed on the frock bar anchor clamps, makes frock bar anchor clamps on-line operation, will take frock bar anchor clamps one side of camera fixing at on-line operation; According to the size of injector syringe to be detected and injector syringe towards, select the focal length of camera lens, shooting angle, shooting distance, aperture size, the time for exposure of camera taken in adjustment, so that obtain photographic images clearly;
(2) start said industrial camera; Take the syringe scale image of a standardized product in advance; And the image of taking transferred to computer; Computer is handled through image algorithm; Extract the image of injector syringe scale; This injector syringe scale 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 the accuracy of detection and the acceptability limit of said detection parameter will be set according to customer requirements;
(4) computer is obtained camera and synchronous triggering and the control signal of production process, starts the image that said camera is taken on-line operation injector syringe scale in real time by external trigger and control signal, and the image of taking is transferred to computer confession detection;
(5) computer is handled through image algorithm, extracts the image of injector syringe scale;
(6) computer calculates the difference ratio of said injector syringe scale 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 and the scale merit image in the said injector syringe scale image with the area discrepancy of its correspondence image piece; Get the maximum in the aforementioned proportion, the difference ratio that this ratio maximum promptly is the injector syringe scale;
(7) judge that through the difference ratio that calculates this product belongs to certified products or waste product, waste product is rejected from the discharging opening of appointment through external trigger and control signal.
Its further technical scheme is: to said (7) step, specifically carry out the judgement and the go-on-go of scale by following step:
(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 said (7) step, when detecting product and be waste product, computer will carry out picture cues through 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 the injector syringe scale 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 through friendly man-machine interface, and give sound, light alarm, reduce workman's detection labour intensity greatly.
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 usage ratio of equipment.
The artificial detection because poor, the vision fatiguability that ventilates is difficult to the Continuous Tracking product quality.Detecting accuracy leans on artificial being difficult to guarantee that 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 improves product percent of pass greatly 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 thick excessively.
Fig. 4 is a process sequence diagram of the present invention.
The specific embodiment
Further specify below in conjunction with the accompanying drawing specific embodiments of the invention.
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 of injector syringe image after through the denoising software processes all around, shown in lines be profile, scale and digital picture after injector syringe is handled.
Embodiment 1, to there being the detection of scale disappearance product:
Injector syringe scale 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, and 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 use and semiclosedly block the influence that the metal framework shields extraneous veiling glare, so that obtain visual pattern more stablely, embody the obvious characteristic of injector syringe scale.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, so that can photograph distinct 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 be so fixing end face during at the printing scale, therefore unified end face towards, promptly unified scale towards).Carry out the conveying of injector syringe through belt transmission system, guarantee that injector syringe by certain direction and speed, stably gets into checkout gear.
Start said industrial camera; Take the syringe scale image of a standardized product in advance; And the image of taking transferred to computer; Computer is handled through image algorithm; Extract the image of injector syringe scale; This injector syringe scale image of obtaining as scale merit image (like Fig. 1), is stored in the computer.
Computer is according to the difference control system of institute of different production firm production equipment; Obtain synchronous triggering of camera and production process and control signal; Start said industrial camera and take the image of the injector syringe scale disappearance of on-line operation; And, be stored in the computer the injector syringe scale disappearance image that obtains.
Computer carries out image to captured image through edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm to be handled, and makes image more clear, more meets the truth of injector syringe scale disappearance.The algorithm that is adopted in the above-mentioned image processing process is conventional algorithm of the prior art.
Computer calculates the disappearance ratio of injector syringe scale.This disappearance ratio be in each image block and the scale merit image in the said scale disappearance 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; Be meant in each row scale and scale merit image the 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; Be meant in each scale numeral and the scale merit image the digital area discrepancy of corresponding scale 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 promptly is the disappearance ratio of injector syringe scale.
As the disappearance ratio that detects scale capable 20 is 50%, the disappearance ratio of scale capable 15 is 9% (situation among Fig. 2); Then to get maximum be 50% to the disappearance ratio of this product, and then this product is a defective work.Like detected disappearance ratio for all less than 10%, then this product is certified products.Computer is pointed out the defective work situation through friendly man-machine interface in image, and gives sound, light alarm, and certified products are write down, classify, add up warehouse-in.
Embodiment 2, to exist scale thick excessively/detection of meticulous product:
Injector syringe scale image as shown in Figure 3, wherein capable 1, the scale capable 2 of capable 0, the scale of scale exists scale thick excessively.
Basler ACA640-100GM type industrial camera is fixed on the side of injector syringe, and 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 thick excessively/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 use and semiclosedly block the influence that the metal framework shields extraneous veiling glare, so that obtain visual pattern more stablely, embody the obvious characteristic of injector syringe scale.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, so that can photograph distinct 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 be so fixing end face during at the printing scale, therefore unified end face towards, promptly unified scale towards).Carry out the conveying of injector syringe through belt transmission system, guarantee that injector syringe by certain direction and speed, stably gets into checkout gear.
Start said industrial camera; Take the syringe scale image of a standardized product in advance; And the image of taking transferred to computer; Computer is handled through image algorithm; Extract the image of injector syringe scale; This injector syringe scale image of obtaining as scale merit image (like Fig. 1), is stored in the computer.
Computer is according to the difference control system of institute of different production firm production equipment; Obtain synchronous triggering of camera and production process and control signal; Start said industrial camera and take the thick excessively image of injector syringe scale of on-line operation; And the injector syringe scale that obtains crossed thick image, be stored in the computer.
Computer carries out image to captured image through edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm to be handled, and makes image more clear, more meets the thick excessively truth of injector syringe scale.The algorithm that is adopted in the above-mentioned image processing process is conventional algorithm of the prior art.
Computer calculates the thick ratio of the mistake of injector syringe scale.This cross thick ratio be in each image block and the scale merit image in the said scale disappearance 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; Be meant in each row scale and scale merit image the 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; Be meant in each scale numeral and the scale merit image the digital area discrepancy of corresponding scale 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 promptly is the thick ratio of the mistake of injector syringe scale;
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 8% (situation among Fig. 2); Then to get maximum be 20% to the thick ratio of the mistake of this product, and then this product is a defective work.Like 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 through friendly man-machine interface in image, and gives sound, light alarm, and certified products are write down, 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 handle discovery through image algorithm, think that then this injector syringe is a defective work, rejects this injector syringe as waste product.
More than the control system (hardware and software) of the image capture device (camera, radiation source, power supply, image pick-up card etc.) that uses among all embodiment 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 adopt prior art to design and produce or directly adopt relevant commercially available prod.
Above-described processing step of the present invention is shown in Fig. 4.
It should be noted that above-described at last only is preferred implementation 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 injector syringe scale:
(1) end face with injector syringe is fixed on the frock bar anchor clamps, makes frock bar anchor clamps on-line operation, will take frock bar anchor clamps one side of camera fixing at on-line operation; According to the size of injector syringe to be detected and injector syringe towards, select the focal length of camera lens, shooting angle, shooting distance, aperture size, the time for exposure of camera taken in adjustment, so that obtain photographic images clearly;
(2) start said industrial camera; Take the syringe scale image of a standardized product in advance; And the image of taking transferred to computer; Computer is handled through image algorithm; Extract the image of injector syringe scale; This injector syringe scale 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 the accuracy of detection and the acceptability limit of said detection parameter will be set according to customer requirements;
(4) computer is obtained camera and synchronous triggering and the control signal of production process, starts the image that said camera is taken on-line operation injector syringe scale in real time by external trigger and control signal, and the image of taking is transferred to computer confession detection;
(5) computer is handled through image algorithm, extracts the image of injector syringe scale;
(6) computer calculates the difference ratio of said injector syringe scale 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 and the scale merit image in the said injector syringe scale image with the area discrepancy of its correspondence image piece; Get the maximum in the aforementioned proportion, the difference ratio that this ratio maximum promptly is the injector syringe scale;
(7) judge that through the difference ratio that calculates this product belongs to certified products or waste product, waste product is rejected from the discharging opening of appointment through external trigger and control signal.
2. according to the automatic testing method of the said NI Vision Builder for Automated Inspection of claim 1, it is characterized in that said (7) step is specifically carried out the judgement and the go-on-go of scale by following step to the injector syringe 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.
3. according to the automatic testing method of the said NI Vision Builder for Automated Inspection of claim 1, it is characterized in that to said (7) step when detecting product and be waste product, computer will carry out picture cues through man-machine interface, and start warning device to the injector syringe scale.
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| Application Number | Priority Date | Filing Date | Title |
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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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| 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
| WO2010146587A1 (en) * | 2009-06-18 | 2010-12-23 | Peer Medical Ltd. | Multi-camera endoscope |
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Patent Citations (5)
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| 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 |
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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 |
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