Tjocklek på plattor, plåt, folie, gummi, isolering, skivmaterial

För snabb upptäckt av felaktig tjocklek på aluminiumband används optoNCDT lasertrianguleringsgiavre som en modern alternativ lösning till isotopiska mätsystem. På mätplatsen är givarna monterade mittemot varandra, över och under det passerande aluminiumbandet. Oavsett bandets exakta höjdposition ger givrna den exakta materialtjockleken baserad på ett enkelt signalförhållande, F = Ref. - (A + B).

Vid tillverkningen av aluminiumplåtar är det viktigt att plåtens tjocklek hålls konstant. Micro-Epsilon erbjuder system för bredd- och tjockleksmätning av varm- och kallvalsad plåt. De läges- och profilgivare som används fungerar oberoende av material eller legering. Sortimentet innehåller ramsystem som arbetar effektivt helt utan radioaktivitet.

In the production of battery separators the in-line monitoring of the profile thickness is an important measurement task within the framework of quality assurance. A measurement system with high spatial resolution and a high sampling rate is needed for the determination of the profile structure. This task represents one of the classical fields of application for the laser-based triangulation sensor in the Series ILD 2000. The battery separator is manufactured in an extrusion process. For the thickness measurement the optical sensors are mounted on a welded C-frame. This traverses on air bearings without making physical contact on a hard rock base. In this way the vibration of the top belt is minimized and a precise measurement facilitated.

Tjockleken på extruderad film är en viktig aspekt när det gäller jämn kvalitet, men stora variationer kan förekomma under produktionen. Extrudersystemet från Micro-Epsilon mäter filmens profil med eller utan beröring direkt efter extruderingsmunstycket. Beläget på en bakre ram passerar systemet kontinuerligt filmröret och tillhandahåller data för styrning av munstycket.

It is often the case for sheet machining that sheets must be transported individually in machines. Therefore, it is essential that only one sheet gets into the machine. If two sheets are on top of each other, the process will be halted. This task is resolved in a simple way using thickness measurement. If the current measured value is different from the thickness of one sheet, an error is detected. The measurement is independent of the absolute position of the sheet in the measuring gap. Depending on the requirement, laser, optical, capacitive or eddy current sensors can be used for this.

Measuring  the  deformation  of  brake  discs  under  load while braking is an ideal task for the optoNCDT 1700BL. Due to the short wavelength of the blue-violet laser used, the light emitted from the red-hot brake does not dazzle the sensor, as the 600-nm wavelength is a long way off the 405-nm wavelength of the blue-violet laser and is effectively blocked by the high quality interference filters employed.

In container glass production, wall thickness and roundness of the bottles are crucial quality features. This is why these parameters must be 100 % inspected. Any faulty containers are immediately rejected and returned to the glass melt. Due to high processing speeds and in order to prevent the bottles from being damaged, a fast, non-contact measurement procedure is required. The confocal chromatic confocalDT 2422 dual-channel measurement system combined with the IFS2406-10 sensor from Micro-Epsilon are ideally suited to this measurement task.

Mineral cotton is often used for heating insulation of buildings.  However,  as  well  as  the  homogenous  material structure, thickness is also a critical factor in ensuring the right insulation characteristics. In the production two  optoNCDT  1700  laser  sensors  with  an  integrated controller and air purge system for protecting the optics are therefore required for quality control.

Gummimattor för tätning måste uppvisa en specificerad tjocklek för hållbarhet och slitstyrka. Trots dålig reflektivitet mäter givaren optoNCDT 1750 avståndet till gummit direkt efter extruderingen. Tjockleken bestäms av differensen mellan givarsignalen och avståndet till en referensvals.

optoNCDT ILR2250-100 lasersensorer från Micro-Epsilon mäter rullarna baserat med fasjämförelsemetoden. För denna mätuppgift monteras en sensor på ett avstånd av 0,2 till 10 m vänd mot rullens radie. Den mäter kontinuerligt avståndet till rullen. Eftersom bandstålrullens diameter konstant reduceras genom avlindningsprocessen ökar följaktligen avståndet mellan rullen och sensorn. Sensorn detekterar på ett tillförlitligt sätt denna förändring i avstånd och överför den som ett mätvärde via RS422 seriellt gränssnitt till styrsystemet. Ett tidigt varningsmeddelande kan nu utfärdas via styrsystemet, redan innan materialet har rullats upp helt.

When producing potato crisps, factors such as consistency, quality and taste depend to a significant degree on the thickness of the potato slices used. Depending on the process parameters and the condition of the tools used, the thickness of the cut slices changes slowly but steadily during the production time. This is why it is important to continuously monitor the thickness during production by using the scanCONTROL 2950-50BL sensor. The sensor projects a laser line onto a conveyor belt, which continuously guides sample slices along it.

A special measuring system has been developed for the quality control of display glass. The glass pane is placed on a measuring table by a robot. A measuring arm with several confocal sensors traverses the glass pane there. If any thickness discrepancies are found, the pane is marked as NOK and rejected. The scanCONTROL laser scanner simultaneously circumnavigates the edges and checks these for defects and dimensions. After the check has been completed successfully, the pane is lifted back into the production process and the next measurement is started.

The thickness of manufactured films is frequently a decisive quality criteria in production. Specially developed thickness measurement systems are used as early as possible in the production for the check of the thickness. Dual sensors consisting of two sensors with different measuring principles measure the thickness across the complete width of the film from one side without contact. A thickness profile of the flat film is thus produced using which the production systems can be regulated extremely precisely. The dual sensors are compiled differently depending on the type of film.

Vid filmproduktion garanterar tjockleksmätning i produktionslinjen konstant produktkvalitet. Micro-Epsilons KS5 kombinationssensor mäter tjockleken på filmer i en beröringsfri process och därmed slitagefri process.

Konsekvent garntjocklek är en förutsättning i textilindustrin för att säkerställa produkter av hög kvalitet. De naturligt förekommande fluktuationerna i garntjocklek måste därför elimineras. Garnet dras till konstant tjocklek med hjälp av ett sträckverktyg och uppmätt data för styrning av sträckverktyget tillhandahålls av en virvelströmsgivare som indirekt mäter tjockleken. Efter sträckningen kontrolleras bearbetningsresultatet av ytterligare en virvelströmsgivare.

A special measuring system has been developed for the quality control of glass. The glass pane is placed on a measuring table by a robot. A measuring arm with several confocal sensors traverses the glass pane there. If any thickness discrepancies are found, the pane is marked as NOK and rejected. The scanCONTROL laser scanner simultaneously circumnavigates the edges and checks these for defects and dimensions. After the check has been completed successfully, the pane is lifted back into the production process and the next measurement is started.

The specification of the thickness of glass panes is an optimization process between a required mechanical strength and efficient use of materials. In the manufacturing process the glass thickness is measured and the conformance to prescribed tolerances is monitored. The measurement is carried out with displacement sensors working on the eddy-current principle. Here, the sensor hovers over the glass surface and measures through the glass to a metal plate situated behind it. The values can be read off directly on the device; an analog output voltage facilitates further evaluation.

Inner liners are used in every tyre to prevent the air from escaping. As the inner liner is a characteristic relevant to safety of every tyre, there are high requirements for compliance with the target data. An important criterion is the layer thickness. The system for measuring the thickness of inner liners operates without contact and wear-free. The inner liner is routed through the measuring system immediately after the calender roller. A measuring head traverses above the surface. An eddy current sensor measures the distance to the reference roller while an optical micrometer measures the distance to the rubber surface. The system can be integrated in the heating circuit of the calender roller for better temperature compensation.

In the manufacturing of plastic panels, thickness profile measurements must be carried out due to the necessary quality assurance. For this purpose two laseroptical displacement sensors are mounted on a traversing device, one underneath and one above the panel which passes along a defined path. The preprogrammed measuring points are sampled consecutively. Irrespective of the exact height position of the panels, the accurate material thickness is obtained by simple coupling of the synchronously measured distance values from both sensors. The output of the desired measurement log is realized with the aid of a PC system in the fully automatic sequence of the profile measurement table.

Hårda industrimiljöer ställer höga krav på optiska lägesgivare när exakta mätningar fortfarande måste kunna utföras, trots damm och höga bearbetningshastigheter. OptoNCDT 1750 och optoNCDT 2300 lasergivare har bemästrat dessa utmaningar under många år. Om störande rörelser (t.ex. bandrörelser, radiella rörelser av styrrullar och baskroppsvibrationer) uppträder som är större än mätobjektet, kan mätprocessen störas eller till och med stoppas. Ett exempel på en sådan rörelsestörning är veck i ett band.

För att skydda PCB från miljöpåverkan är de belagda med en tunn skyddande klarlack. Detta förhindrar funktionsfel som kan orsakas av luftfuktighet. Konfokala givare från Micro-Epsilon möjliggör beröringsfri tjockleksmätning som minskar risken för skador. IFS2405-givare med hög precision har ett mätområde på 1 mm och en mätfläckstorlek på bara 8 µm. Lacktjockleken som ska mätas är mellan 30 och 200 um. Byte av substrat bestående av kopparbanor, passiverade skikt och PCB-yta påverkar inte mätresultaten.

When optical data carriers are produced, the data are initially transferred to a master. Depending on the number of copies, different dies made of nickel are produced from the master by galvanisation. These dies must show a thickness of 297 µm ± 3 µm for faultless production. It is checked several times during the galvanisation that this dimension is complied with. The company ISEDD GmbH from Bielefeld has developed a measuring device for this which enables fast and accurate inspections of the dies. Capacitive sensors from Micro-Epsilon are used for the thickness measurement.

Tjockleksmätning med hjälp av sensorer är ett stort område. I grund och botten finns det skillnader mellan icke-destruktiv/destruktiv, beröringsfri mätning/kontaktmätning och ensidig/tvåsidig tjockleksmätning. Micro-Epsilons mättekniker för tjockleksmätning är alla emissionsfria och inga emissionsföreskrifter av något slag måste följas. Tjockleksmätningar måste utföras såväl med hjälp av kontaktmätning och beröringsfri mätning varvid beröringsfria mättekniker visar fördelar vad gäller noggrannhet och mäthastighet. Det finns också en skillnad mellan ensidig och tvåsidig tjockleksmätning. Tvåsidiga tjockleksmätningar utförs med minst ett par sensorer som är monterade tillsammans på en axel. Sensorparet mäter målet synkront. Skillnaden mellan mätresultaten (C-A-B) ger tjockleken på mätobjektet. Ensidiga tjockleksmätningar får endast utföras med beröringsfria sensorer. Här mäts mätobjektet endast med en sensor och antingen mäts endast en del av måltjockleken (t.ex. lagertjocklek) eller hela mätobjektets tjocklek. Tjockleksmätningar används främst inom processtyrning och kvalitetssäkring t.ex. för kontroll av extruderingssystem eller kontroll av rördiametrar.

Precise thickness specifications are assigned for the manufacture of rubber film which is rolled using calender rollers. Random-sample manual measurements, as previously carried out, are no longer sufficient for today’s demands on quality assurance. Consequently, a system with three fixed tracks has been adapted for in-line inspection of the thickness. For each track an eddy current sensor of Type U6 is built into a jockey follower system which measures against an stainless steel roller. Controllers of the range multiNCDT series 100 are employed for the evaluation electronics. The stainless steel roller represents the reference system for the measurement.

The oil film thickness for combustion engines describes the gap and thus the quantity of oil between piston and cylinder wall. Thus it is sometimes a determining factor for smooth operation and durability. As the oil film can only be integrated and really measured in the firing condition, it is extremely difficult to manufacture sensors for these environmental conditions and then also find space for them. Specially miniaturised eddy current sensors from Micro-Epsilon are capable for this. The smallest with only 2.4 mm external diameter is integrated directly into the cylinder wall and ground to its shape. There, it measures the distance from sensor to piston or the space available for the engine oil for lubrication in every stroke.

To prevent damage, laser-based optical displacement sensors are employed in front of the inlet for profiled sheets in presses to enable the detection of double sheets. The sensors are mounted opposite one another, above and below the passing sheets. Irrespective of the actual position of the sheets, the material thickness is obtained by

simple coupling of the distance signals from both sensors. For adjustment a master sheet for each type of sheet is inserted into the measuring gap and the resulting signal set to zero. The zero value is monitored within a tolerance. The sensors are operated in special protective housings because of the harsh ambient.

Optical laser displacement sensors are employed in front of the inlet for panels on straightening machines to prevent damage to the machine. The sensors enable the detection of double sheets and an accurate acquisition of upright edges.

Layer thickness measurement belongs to the group of one-sided, non-contact thickness measurement. Basically, only the layer thickness of electrical insulators can be measured for opaque objects. An eddy current sensor penetrates the insulating layer without damage and measures the distance to a layer underneath it. At the same time, a second sensor, a laser triangulator measures the insulating layer. The layer thickness is obtained by offsetting both signals. This method of measuring with two sensors using different principles is called the dual sensor technique by Micro-Epsilon.

A second possibility is the layer thickness measurement of transparent materials using confocal measurement technology. The emitted white light penetrates the measuring object and provides a peak in the signal graph at every material transition. For example, the film thickness between two glass panes can be easily measured in this way.

Ytskiktet på bilens instrumentbrädor och för airbagsbeklädnad sprayas i en uppvärmd form med ett robotstyrt munstycke. Av säkerhetsskäl krävs extremt låga toleranser för krockkuddar. Av denna anledning måste tjockleken på det sprutade skiktet inspekteras inline under sprayningsprocessen. Mätningen utförs med en kombinationssensor (en virvelströmssensor och en lasertrianguleringssensorer) som är fäst vid robotarmen. Virvelströmssensorn mäter avståndet till den nickelbelagda sprayformen och har en öppning i mitten genom vilken lasersensorn mäter avståndet till det sprayade skiktet. Genom subtraktion ger båda signalerna tjockleken på det sprayade skiktet.

These days, flat washers are an auxiliary material used in almost every industry. In most cases, the washers consist of different alloys and are required in all sizes and thicknesses, which means the demands on the manufacturers are particularly high. In order to supply the customer with a correctly sorted, high quality product, the thickness and diameter are inspected before the washers are packed. This inspection is carried out using a scanCONTROL 2910-50 laser scanner.

Using a film between several glass panes, laminated safety glass prevents dangerous shards flying around in the case of breakage. The adhesive film is clamped during the production. In doing so, it is important that the film shows the correct thickness in order to be able to ensure the required safety. Thickness can be measured on one side using the confocalDT confocal system. The light from the sensor penetrates the glass and displays the thickness of the film in the pane.