CN103543205A - Method and system for detecting foreign matters in bottled liquid - Google Patents
Method and system for detecting foreign matters in bottled liquid Download PDFInfo
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- CN103543205A CN103543205A CN201310493153.XA CN201310493153A CN103543205A CN 103543205 A CN103543205 A CN 103543205A CN 201310493153 A CN201310493153 A CN 201310493153A CN 103543205 A CN103543205 A CN 103543205A
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Abstract
The invention relates to the technical field of ultrasonic imaging automatic detection and in particular discloses a method and a system for detecting foreign matters in bottled liquid. The method disclosed by the invention comprises the steps of S1, acquiring an ultrasonic image of the bottled liquid to be detected by an air coupling ultrasonic imaging technology; S2, pretreating the acquired ultrasonic image of the sample to be detected to remove interference; and S3, comparing the pretreated ultrasonic image of the sample to be detected with a standard ultrasonic image of bottled liquid without foreign matters to detect the foreign matters in the bottled liquid to be detected. The method and the system can be used for automatically detecting the foreign matters in the bottled liquid by comparing the ultrasonic image of the sample to be detected with the standard ultrasonic image by the air coupling ultrasonic imaging technology, can realize objective, real-time, quick and accurate detection and can be also applied to detection on high-concentration non-transparent liquid. The method and the system disclosed by the invention are relatively low in cost, favorable for automation and suitable for automatic detection of most bottled liquid production lines.
Description
Technical field
The present invention relates to ultrasonic imaging Automatic Measurement Technique field, be specifically related to detect based on ultrasonoscopy the method and system of foreign matter in bottling liquid.
Background technology
The huge market demand makes the bottling liquid production industries such as mineral water, beer, beverage and parenteral solution keep steadily development fast, and the progress of science and technology impels the automaticity of production and packaging facilities more and more higher.At present, bottled liquid manufacturer all adopts plant equipment to carry out automatic sealing to bottle.Because several factors causes may mixing graininess foreign matter in bottle, for example metal, glass, wood chip, hair.Therefore must adopt certain detection means to the bottled liquid having sealed, find underproof product, by its rejecting.How seeing through bottle and fast, accurately, clearly detect the bulk properties of the bottling liquid having sealed, is in judgement bottle, whether to have the top priority of foreign matter.
Conventional detection method for foreign matter in bottling liquid has artificial lamp test, high performance liquid chromatography and the liquid impurity based on image processing to detect at present.Wherein the detection efficiency of Manual light inspection is low, speed is slow, precision is low, loss is high, testing staff is easily tired, helpless for opaque bottle or liquid, is not suitable for modernization large-scale production line.High performance liquid chromatography detection speed is slow; Because technology content is higher, market is mainly external brand to be occupied, and domestic brand is always in compacting state; And instrument is expensive, maintenance difficult, expense is high, always can not be as special detecting instrument.The same efficiency of liquid impurity detection technique of processing based on image is lower, in addition this method based on optical transmission (adopts light source to irradiate bottle to be checked, video camera imaging) because the bottle that in fact a lot of liquid colors to be checked are dark, concentration is higher and have is opaque, cause the practical effect of the method very undesirable.
Air Coupling ultrasonic imaging, utilizes air as couplant, realizes material quick nondestructive scanning imagery.Be a kind of in real time, without wound, succinct formation method, since emerging, be widely used in scientific research field.The ultrasonic spatial shape that can reflect accurately material internal is the very effective instrument of research material external morphology characteristic.And take the method for ultrasonoscopy detection foreign matter in bottles few.
Summary of the invention
When the present invention is intended to overcome prior art detection bottling liquid foreign matter, the limited shortcoming of range of application, provides a kind of detection method and system based on Air Coupling ultrasonic imaging.
Technical scheme of the present invention comprises a kind of method for detection of foreign matter in bottling liquid, comprises step: S1 is used Air Coupling ultrasonic imaging technique, gathers the ultrasonoscopy of bottling liquid to be measured; S2 carries out pre-service to the test sample ultrasonoscopy for the treatment of collecting; And S3 is by treating that by pretreated test sample ultrasonoscopy and the standard ultrasound image that does not contain foreign matter bottling liquid contrast processing, detect the foreign matter in bottling liquid to be measured.
In some embodiment, step S1 can be included in perpendicular to the direction collection of the side of described bottling liquid to be measured or bottom surface and treat test sample ultrasonoscopy.
In some embodiment, step S2 can comprise and treats that to described test sample ultrasonoscopy removes noise, and carry out greyscale transformation.
In some embodiment, step S3 can comprise respectively standard ultrasound image and treat that test sample ultrasonoscopy carries out fast fourier transform, obtain canonical transformation area image and treat test sample transform domain image, and according to the comparative analysis of described transform domain image, the foreign matter in described bottling liquid to be measured.
In some embodiment, the comparative analysis of step S3 operation comprises: S31 makes canonical transformation area image and treats the center brightness normalization of test sample transform domain image, and keeps separately in image each pixel and central pixel point brightness ratio constant; S32 is centered by described central pixel point, and the length of respectively getting up and down certain pixel quantity marks off a rectangle, and adds up respectively in the part outside rectangle separately, and brightness surpasses the number N of the pixel of threshold value G1
standardand N
to be measured; And S33 relatively treats N in test sample transform domain image and canonical transformation area image
standardwith N
to be measuredvalue, work as N
to be measured> N
standardtime, think in described bottling liquid to be measured and comprise foreign matter.
In some embodiment, use a plurality of standard ultrasound image and corresponding a plurality of canonical transformation area image, and in step S302, the maximal value of N in described a plurality of canonical transformation area images is defined as to N
standard.
The present invention provides a kind of use above method on the other hand, and for detection of the system of foreign matter in bottling liquid, described system comprises: Air Coupling acquiring ultrasound image equipment, and what it gathered bottling liquid to be measured treats test sample ultrasonoscopy; Storer, it prestores one or more standard ultrasound image data that do not contain the bottling liquid of foreign matter; Data processing equipment, test sample ultrasonoscopy is treated in its reception, treats test sample ultrasonoscopy described in pre-service, and described in carrying out, treats the comparative analysis of test sample ultrasonoscopy and standard ultrasound image, to detect the foreign matter in described bottling liquid to be measured; And sorting arrangement, it rejects the bottling liquid to be measured containing foreign matter according to the testing result of data processing equipment.
In some embodiment, described bottling liquid to be measured is the bottling liquid on streamline.
The present invention utilizes Air Coupling ultrasonic imaging technique, gathers non-contactly ultrasonoscopy, and by treating test sample ultrasonoscopy and standard ultrasound image contrast processing, automatically detects the foreign matter in bottling liquid.Detection method and the system of this law are objective, real-time, quick, accurate, and applied range, can not only detect transparency liquid, also can detect existing optical detection and be difficult to applicable high concentration, opaque liquid.Method and system relative price of the present invention is cheap, easily is automated, applicable to the automatic detection of most of bottling liquid production line.
Accompanying drawing explanation
Fig. 1 is for detection of the Method And Principle schematic diagram of foreign matter in bottling liquid according to the present invention.
Fig. 2 is the structural representation of Air Coupling ultrasonic probe.
Fig. 3 schematically shows the block diagram according to detection system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Although should be understood that in the following drawings and embodiment, for the foreign matter in bottling liquid on streamline, detect and be described, system and method for the present invention is also applicable to the detection to foreign matter in bottling liquid under other environment.
With reference to figure 1 and Fig. 3, schematically illustrated the present invention is for detection of Method And Principle and the system structural framework of foreign matter in bottling liquid respectively.The detection system that the present invention is based on as seen from the figure Air Coupling ultrasonic imaging technique mainly comprises: Air Coupling acquiring ultrasound image equipment, and it treats test sample ultrasonoscopy for what gather bottling liquid to be measured; Storer, it prestores one or more standard ultrasound image data that do not contain the bottling liquid of foreign matter; Data processing equipment, test sample ultrasonoscopy is treated in its reception, treats test sample ultrasonoscopy described in pre-service, and described in carrying out, treats the comparative analysis of test sample ultrasonoscopy and standard ultrasound image, to detect the foreign matter in described bottling liquid to be measured; And sorting arrangement, it rejects the bottling liquid to be measured containing foreign matter according to the testing result of data processing equipment.
Wherein Air Coupling acquiring ultrasound image equipment comprises ultrasonic probe and imaging system.Air Coupling ultrasonic probe can be vertically fixed near the suitable position (as side or bottom) of bottling liquid, with the direction collection ultrasonoscopy of the side perpendicular to bottling liquid to be measured or bottom.Can adjust the position of Air Coupling ultrasonic probe, carry out the contrast to optimize, show the details of the interior liquid of bottle in ultrasonoscopy.
With reference to figure 2, it is the structural representation of Air Coupling ultrasonic probe.This probe mainly absorbs piece 4, composite wafer 5, diaphragm 6(coupling layer by the backing being arranged in capsul 2) and electrode 7 formations.Joint 1 is outside capsul, by signal wire 3 connecting electrodes.Because being mainly subject to three aspects:, hyperacoustic propagation affects: the conversion efficiency of the aerial decay of ultrasound wave, the hyperacoustic a large amount of reflections of Gas-solid surface, ultrasonic transducer.The above two are spontaneous phenomenon and cannot change.Here adopt composite wafer can significantly improve ultrasonic transducer conversion efficiency, realize non-contact detection.
Storer and data processing equipment can be the parts in same computing machine, or are arranged in different computing machines.In addition, the imaging system in Air Coupling acquiring ultrasound image equipment can be also the parts in computing machine.
According to the present invention, for detection of the method for foreign matter in bottling liquid, mainly comprise the following steps: first use Air Coupling ultrasonic imaging technique, gather the ultrasonoscopy of bottling liquid to be measured; Then the test sample ultrasonoscopy for the treatment of collecting is carried out to pre-service, to remove interference; Finally use image processing algorithm, the more pretreated standard ultrasound image for the treatment of test sample ultrasonoscopy and not containing foreign matter bottling liquid, to detect the foreign matter in bottling liquid to be measured.
In the present invention, by Air Coupling ultrasonic testing system, obtain the ultrasonoscopy of bottling liquid, then by image comparison Processing Algorithm, the consecutive image that sampling is obtained is processed and is detected, to judge whether there is foreign matter in liquid.
Air Coupling ultrasonic imaging adopts highly sensitive contactless Air Coupling supersonic detection device, obtains the ultrasonoscopy of bottling liquid.This system is comprised of ultra high power ultrasonic transmitter-receiver, high sensitivity Air Coupling probe and PC, thoroughly broken through traditional ultrasonic detection method, make can not for porous seepage material, to the material of water or other couplant sensitivities, forbid contact the detections such as workpiece become a reality.Started Ultrasonic Nondestructive industry in new era of 21 century, realized the velocity of sound of the various materials of supersonic non-contact and measured and defect detection.
Owing to adopting Air Coupling supersonic imaging apparatus to gather ultrasonoscopy, can demonstrate the bulk properties of bottle, overcome the limitation of the method for automatic measurement based on optical transmission principle in prior art, particularly overcome for liquid color to be checked is dark, concentration is higher or the opaque situation of bottle detects the undesirable defect of effect.Can detect automatic, objective, exactly in bottling liquid, whether have foreign matter, and of the present invention can also automatically detection the ultrasonoscopy of continuous multiple frames bottling liquid in real time, has realized the real-time of this method for automatic measurement.
In the embodiment that foreign matter detects in the bottling liquid of streamline shown in Fig. 1, can, by regulating this Air Coupling supersonic imaging apparatus, for example, with the sample frequency consistent with streamline product speed, gather continuously the image of the bottling liquid on production line.
In pre-treatment step, pre-service can comprise the ultrasonic picture of the bottling liquid to be measured to collecting, and (for example first removes the interference such as picture noise, adopt the methods such as weighted mean filtering), and image is used to for example greyscale transformation function, and carry out greyscale transformation, adjust picture contrast.These preprocess methods to ultrasonoscopy are known in this area.Those skilled in the art can select to adopt suitable algorithm to process.
In contrast treatment step, the ultrasonoscopy that can adopt one or more standard bottling liquids (this liquid be considered to not containing foreign matter) is object as a comparison.Can regard the bright spot in ultrasonoscopy as foreign matter, when the bright spot number in the ultrasonoscopy of bottling liquid to be measured is greater than the bright spot number in standard bottling liquid ultrasonoscopy, can thinks in this bottling liquid to be measured and contain foreign matter.
For the ease of comparing, and the accuracy that improves detection, image processing operations in this step can be first respectively to standard ultrasound image with treat that test sample ultrasonoscopy carries out fast Fourier transform (FFT), obtain canonical transformation area image and treat test sample transform domain image.FFT can improve image high fdrequency component, strengthens textural characteristics in original image, is convenient to next step foreign matter identification.One or more canonical transformation area images through FFT conversion can be stored in advance in storer.
Then according to transform domain image, by relative discern foreign matter.Particularly, make canonical transformation area image and treat the center brightness normalization of test sample transform domain image, even two width transform domain image center brightness to be distinguished equate, keep separately in image each pixel and central pixel point brightness ratio constant simultaneously.This step can effectively be got rid of overall intensity difference between the two width images that cause because of extraneous factors such as light environments.
Then centered by central pixel point, respectively get up and down the length of certain pixel quantity, particularly, can be according to the size of actual ultrasonoscopy, optimum with test of many times is determined length, thereby mark off a rectangle, and add up respectively in the part outside rectangle separately, brightness surpasses the number N of the pixel of threshold value G1
standard(for canonical transformation area image) and N
to be measured(for treating test sample transform domain image).
Threshold value G1 can establishing criteria bottling liquid ultrasonoscopy gray-scale value determine, for example, according to formula
d wherein
ifor the average gray value of standard picture, N is the number of accepted standard bottling liquid.
Relatively treat N in test sample transform domain image and canonical transformation area image
standardwith N
to be measuredvalue, work as N
treat survey> N
standardtime, think in described bottling liquid to be measured and comprise foreign matter, and can be rejected; Otherwise be specification product.
In using the situation of a plurality of standard ultrasound image and corresponding a plurality of canonical transformation area images, for example, a plurality of standard ultrasound image in storer (, internal memory) are repeated to aforesaid operations, the maximal value of the N of a plurality of transform domain images is defined as to N
standard.
The present invention utilizes Air Coupling ultrasonic imaging technique, gathers non-contactly ultrasonoscopy, and by treating test sample ultrasonoscopy and standard ultrasound image contrast processing, automatically detects the foreign matter in bottling liquid.Detection method and the system of this law are objective, real-time, quick, accurate, and applied range, can not only detect transparency liquid, also can detect existing optical detection and be difficult to applicable high concentration, opaque liquid.Method and system relative price of the present invention is cheap, easily is automated, applicable to the automatic detection of most of bottling liquid production line.
The above the specific embodiment of the present invention, does not form limiting the scope of the present invention.Various other corresponding changes and distortion that any technical conceive according to the present invention has been done, all should be included in the protection domain of the claims in the present invention.
Claims (8)
1. for detection of a method for foreign matter in bottling liquid, it is characterized in that, comprise step:
S1 is used Air Coupling ultrasonic imaging technique, gathers the ultrasonoscopy of bottling liquid to be measured;
S2 carries out pre-service to the test sample ultrasonoscopy for the treatment of collecting; And
S3 is by treating that by pretreated test sample ultrasonoscopy and the standard ultrasound image that does not contain foreign matter bottling liquid contrast processing, detect the foreign matter in bottling liquid to be measured.
2. the method for claim 1, wherein step S1 is included in perpendicular to the side of described bottling liquid to be measured or the direction collection of bottom surface and treats test sample ultrasonoscopy.
3. the method for claim 1, wherein step S2 comprises and treats that to described test sample ultrasonoscopy removes noise, and carries out greyscale transformation.
4. the method for claim 1, wherein, step S3 comprises respectively standard ultrasound image and treats that test sample ultrasonoscopy carries out fast fourier transform, obtain canonical transformation area image and treat test sample transform domain image, and according to the comparative analysis of described transform domain image, detect the foreign matter in described bottling liquid to be measured.
5. method as claimed in claim 4, wherein, the comparative analysis of step S3 operation comprises:
S31 makes canonical transformation area image and treat the center brightness normalization of test sample transform domain image, and keeps separately in image each pixel and central pixel point brightness ratio constant;
S32 is centered by described central pixel point, and the length of respectively getting up and down certain pixel quantity marks off a rectangle, and adds up respectively in the part outside rectangle separately, and brightness surpasses the number N of the pixel of threshold value G1
standardand N
to be measured;
S33 relatively treats N in test sample transform domain image and canonical transformation area image
standardwith N
to be measuredvalue, work as N
to be measured> N
standardtime, think in described bottling liquid to be measured and comprise foreign matter.
6. method as claimed in claim 5, wherein, is used a plurality of standard ultrasound image and corresponding a plurality of canonical transformation area image, and in step S302, the maximal value of N in described a plurality of canonical transformation area images is defined as to N
standard.
7. right to use requires the method described in 1 to 6, and the system for detection of foreign matter in bottling liquid, is characterized in that, described system comprises:
Air Coupling acquiring ultrasound image equipment, what it gathered bottling liquid to be measured treats test sample ultrasonoscopy;
Storer, it prestores one or more standard ultrasound image data that do not contain the bottling liquid of foreign matter;
Data processing equipment, test sample ultrasonoscopy is treated in its reception, treats test sample ultrasonoscopy described in pre-service, and described in carrying out, treats the comparative analysis of test sample ultrasonoscopy and standard ultrasound image, to detect the foreign matter in described bottling liquid to be measured; And
Sorting arrangement, it rejects the bottling liquid to be measured containing foreign matter according to the testing result of data processing equipment.
8. system as claimed in claim 7, wherein, described bottling liquid to be measured is the bottling liquid on streamline.
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| CN105678764A (en) * | 2016-01-06 | 2016-06-15 | 上海斐讯数据通信技术有限公司 | Processing method, processing device and mobile terminal for ear internal image data |
| CN107316297A (en) * | 2017-07-07 | 2017-11-03 | 山东商务职业学院 | The visible detection method of edible oil impurity |
| TWI669265B (en) * | 2017-02-20 | 2019-08-21 | 統一企業股份有限公司 | Three-machine integrated detection device |
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| CN111538015A (en) * | 2020-04-27 | 2020-08-14 | 江苏大学 | Online detection device for metal foreign matters in sausage based on line focusing ultrasound |
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| CN116609853A (en) * | 2023-07-17 | 2023-08-18 | 德州晶华药用玻璃有限公司 | Ultrasonic automatic detection device for foreign matters in borosilicate glass injection bottle packaging end bottle |
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| CN105067706A (en) * | 2015-08-05 | 2015-11-18 | 广东省自动化研究所 | Heat-seal flexible packaging sealing testing method and system based on air coupling ultrasound |
| CN105067706B (en) * | 2015-08-05 | 2018-11-23 | 广东省智能制造研究所 | Heat-sealing flexible package method for conducting leak test and system based on Air Coupling ultrasound |
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| CN111538015A (en) * | 2020-04-27 | 2020-08-14 | 江苏大学 | Online detection device for metal foreign matters in sausage based on line focusing ultrasound |
| WO2022101819A1 (en) * | 2020-11-16 | 2022-05-19 | International Business Machines Corporation | Enhanced liquid container for liquid authentication |
| CN116609853A (en) * | 2023-07-17 | 2023-08-18 | 德州晶华药用玻璃有限公司 | Ultrasonic automatic detection device for foreign matters in borosilicate glass injection bottle packaging end bottle |
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Application publication date: 20140129 |