2 JLI vision a/s Founded in 1985 1.000 + systems in operation High end advanced turnkey systemsSystem integratorsNo other business than vision systems
3 JLI vision a/s Main business areas: Medical device inspection Glass SteelSpecial applications
4 Glass systems Falls into two main categories: Precise dimensional measurementsSelf calibrating dimensions down to mmInspection systemsFault detectionStatistical production controlValidated systems up to FDA standard
8 Key challenges Scene – how to get images with high contrasts Illumination – how to enhance the defects you want to find, or obtain sharp images for reliable measurements
9 Programming If you get a good image the programming is easy If you have been working with inspection for more than 30 years you will have a solid base of programmes for all applications.
10 Statistics Vision systems are optical measurement devices Statistical data is collected and displayed – trend graphs and measurementsImage storage of faultsInternet connection for remote data processing and presentation
15 Dynamic Light BoxThree different illumination patterns are necessary to find all defectsThe dynamic light box is programmed by the vision systemUp to 25 patterns and analysis can be performed pr. second.
17 Dynamic Light Box Flexible and remote controlled structured lighting Excellent for fine tuning inspectionFine tuning can be done remotelyWhen new models are introduced the engineers can help the operators adjusting the system
18 NIR or backlighting Examples of where Near Infra Red can be used Drawbacks and inherent problemsNIR images are blurred and noisyNIR technology is not cheap
22 Line scan CCD matrix camera Light boxHot conveyorLinescan generates the image Matrix camera takes a snapshotby moving the object past the camera
23 Line scan NIR CCD matrix camera backlighting Light boxHot conveyorNIR is reflected from neighbouring Background lighting generatescontainers, generating false signals no false reflections
24 SignalNIR signal response400 C C Temp. X MassRadiation related to temperature times mass on a middleweight container.Low temperature and thin wall gives a very small signal.High temperature and thick wall drives the CCD chip into saturation.It is difficult to obtain a good dynamic range.
25 Problems with light weight containers NIR relies on radiation from the containerThe radiation is a function of wall thickness and temperatureTemperature depends on cooling in the cavities and transport time on the hot conveyorThe NIR signal from lightweight containers is poor.
26 BacklightingUsing backlighting, the glass distribution can be assessed with a resolution better than 0.1 mm on green and amber glassAnd it works equally well on hot and cold containers – this makes testing easy
33 Pharmaceutical glass Glass is used extensively for medicine FDA has recently focused on the quality of the glass tubing used for pharmaceutical productsTo make fault free glass containers you need high quality tubingNo airlines and no stone and knots
34 PDA Technical Report 43 Parenteral Drug Association Identification and Classification of Nonconformities in Molded and Tubular Glass Containers for Pharmaceutical ManufacturingThe purpose of this technical report is to provide consistent, standardized quality criteria that can be used by pharmaceutical companies for the visual inspection of incoming glass containers.
36 SK 3010 specifications Tube diameter: 1.0 - 50 mm. Max wall thickness: % of tube diameter.Line speed: Metres / sec.Smallest detectable stone/knot: mm.Shortest detectable airline length: mm.Smallest airline width detected: mm.Durable sodium street lighting with a service life of more than 5 years.Internet connection for remote servicing
37 Defect / reject relations 4 airlines max 25 mm in length within one length is acceptable AND2 airlines max 50 mm in length within one length is acceptable AND1 airline max 100 mm in length within one length is acceptable.Stone & knot inspection is set in a similar way.An example:4 stones/knots above 0.1 mm in diameter is acceptable AND1 stone/knot above 0.3 mm in diameter is acceptable AND0 stones/knots above 1 mm in diameter is acceptable
40 Summery JLI makes the high end vision systems The tailor made systems that needs engineering and adaptationsThe “impossible” jobsAll systems are delivered with a functional guarantee and a“no cure no pay” clause