Machine Vision Systems

for Control Units, HMIs, MMIs and general LED systems in the industrial, aerospace and automotive sector

noris­TEC will sup­ply you with ful­ly or semi­au­to­mat­ed end  of line test sys­tems for a wide range of con­trol units, HMIs  and MMIs.

Indus­tri­al image pro­cess­ing is an inte­gral part of typ­i­cal end  of line tests.

We are rely­ing on our own native Lab­VIEW IMAQ Vision  Toolk­it, the nVi­sion­Ser­vice. This enables us to meet cus­tomer  require­ments quick­ly, repro­ducibly and cost-effec­tive­ly.

Using high qual­i­ty GigE Vision cam­eras pro­vides the per­fect match of accu­ra­cy,  speed and price.

Product Testing

In gen­er­al, prod­uct test­ing requires cer­tain test steps:

• Ver­i­fi­ca­tion of sym­bols and sym­bol posi­tions using pat­tern  match­ing (con­trols and dis­play)
• Func­tion­al test­ing of sym­bol groups includ­ing short-cir­cuit  detec­tion
• True-colour LED assem­bly ver­i­fi­ca­tion
• Light den­si­ty mea­sure­ment of all ele­ments (back­light,  func­tion)
• Eval­u­a­tion of aver­age light den­si­ty
• Eval­u­a­tion of homo­gene­ity with­in the sym­bols and in  between sym­bols Deter­mi­na­tion of com­pen­sa­tion val­ues used in the UUT’s  led-con­troller
• Retest­ing of the cor­rect­ed light­ing

nVisionService

The noris­TEC nVi­sion­Ser­vice is devel­oped native­ly in NI Lab­VIEW and uses the NI IMAQ Vision func­tion-ali­ties run­ning on a Stan­dard Win­dows PC (embed­ded or indus­tri­al).

It already includes com­mon mea­sure­ment and test func­tions  required for prod­uct test­ing. It can eas­i­ly be inte­grate it into  a cus­tomer appli­ca­tion and envi­ron­ment using a TCP trans­port pro­to­col.

The user-friend­ly UI enables you to adapt your sys­tem by  your­self.

Why nVisionService?

Requirements

Indus­tri­al image pro­cess­ing is  an essen­tial part in mod­ern  EOL sys­tems with the need to  cov­er var­i­ous require­ments:

• Sym­bol ver­i­fi­ca­tion
• Posi­tion ver­i­fi­ca­tion
• Colour ver­i­fi­ca­tion
• Func­tion­al test­ing
• Light den­si­ty mea­sure­ment
• Cal­cu­la­tion of com­pen­sa­tion val­ues

Solutions

We are offer­ing cus­tom-build  and cost-effec­tive vision  solu­tions based on a flex­i­ble  and potent plat­form.

• nVi­sion­Ser­vice: an NI IMAQ Vision based vision toolk­it
• Mea­sure­ment-job admin­is­tra­tion
• Teach and para­me­ter soft­ware
• Any com­mon GigE machine vision cam­eras

Features

• Light den­si­ty mea­sure­ment in cd/​m²
• Cam­era mount­ing at defined dis­tance and field of view
• Shad­ing cor­rec­tion against inte­grat­ing sphere
• Com­pen­sa­tion val­ues for each LED colour

Newly designed nT LightDensity Measurement

In order to obtain com­pa­ra­ble,  absolute bright­ness infor­ma­tion,  the light den­si­ty needs to be  spec­i­fied in cd/​m². There­fore, we  are always inte­grat­ing the  cam­eras into our sys­tems in the  same way:

• Fixed cam­era mount­ing on sta­ble mount­ing brack­ets
• Cam­era adjust­ment at a defined dis­tance and field of view
• Shad­ing cor­rec­tion against inte­grat­ing sphere
• Com­pen­sa­tion val­ues for each led colour using a cus­tom made test­ing dum­my

Colour Correction

Our Vision Toolk­it acquires 12-bit  greyscale images while apply­ing  a shad­ing com­pen­sa­tion.

The light den­si­ty val­ue then is deter­mined for indi­vid­ual ele­ments using the LED col­or cor­rec­tion and tak­ing into account the image record­ing para­me­ter, expo­sure time and  gain.