Table of Contents
Contents
1. to the slope of the edge Figure 3 Effect of Edge Angle on Sharp Edge with Slope Location 2 4 Curved Surface When the surface region is curved the Surface Offset and Surface Width should be set such that the surface region is as close to the edge as possible 3D MEASUREMENT amp CONTROL MADE EASY Gocator 2000 2300 Appnote_Gap_Flush_Setup_Guideline doc Peer er ee Guidelines y Application Note Gocator Gap and Flush Measurement Tool Setup Page 4 7 Surface Region Figure 4 Curved Surface s Surface Region Setup 2 5 Stabilize Flush Measurement Surface Width of the reference region has a strong influence on the stability of the flush measurement This is because flush measures the perpendicular distance from the reference side s fitted surface line to the feature point on the secondary surface A slight angle change in the reference side s fitted surface line would have an amplified effect on the measured distance This is illustrated below Reference Side O Feature Point lt Surface Width gt l Fitted Surface Line 2 3 ee ae J Fi Flush Variation Slight change in surface itted Surface Line 1 line fitting gt gt Surface Width Figure 5 Effects of Surface line fitting on Flush Measurement To increase the stability of the flush measurement the surface width on the reference side should be as large as p2. Guidelines y Application Note Gocator Gap and Flush Measurement Tool Setup Page 1 7 Title Gocator Gap and Flush Measurement Tool Setup Guidelines Purpose This document explains how to setup the Gocator s gap and flush measurement tools Equipment Gocator Firmware Release 3 3 or later Table of Contents VS arses ett cs especie ec tect seeac ceb ee pe seas es estan enc Sey Suse gage ese ee ute nese O belts ceee nace deinen R tao ee 2 2 Setup Guidelines cccccceseeceeccceseeeenccceseeeeeccceneeeesscosencenseoseeneeesscesnecensacseecensocseeeeessocseneeesscaeaeensaceseneenseceseneesses 2 ZAME eae te eth e e E a E E RE 2 2 2 Laser FICTIOCUON sereen EE r RAR R eE E A AE AE EAEE R AR ERTENED ERRORE 2 AN EOE aeea E E E E E 3 24 Curved S d GE eae E eE E Err AOA ee eee en eee ener 3 2 5 Stabilize Flush MEASUrEMENL e ccc cec eee ecceccecceceececceececeeceeceeaeceececeeaecaecueaeeaecaeseeaesaesesesaeseseeseeaesueseeaesaneneaeeas 4 2 6 Multiple Gap like Feature within the Active Area ccccccccccccccseseeeeceeeeeeeaeeseeeceeeeesaaeaseeeeeeseesuaaaeeeeeeeessaaaageses 4 2 7 Paint Flakes and Plastic Surface ccccccccccecccceccccececcucccecuececcececuececceueuucauuucsececsuaucuuaecseaececcesucsesecsuaecauaeceraeses 6 Guidelines y Application Note Gocator Gap and Flush Measurement Tool Setup Page 2 7 1 Overview This document provides guidelines on how to set up the gap and flush measurements in t
3. he Gocator This document assumes readers are already familiar with the gap and flush model and algorithm described in the Gocator user manual Key concepts explained in the user manual are formatted in italics and setting names are in Bold 2 Setup Guidelines 2 1 Ambient The algorithm filters out ambient by rejecting outliers when fitting the surface line or circle fit However measurements are most repeatable when there are no spots caused by ambient User can use the sensor s active area or measurement area to mask out unintended objects or reflections Refer to the Gocator user manual on how to set the sensor s active area and measurement area 2 2 Laser Reflection User must mount the sensor such that the laser is not directly reflected back into the camera window Direct laser reflection could severely affect the measurement accuracy The following diagram illustrates a setup that exhibits this problem DICHE line reflection X Figure 1 Direct Laser Reflection into the Camera Guidelines y Application Note Gocator Gap and Flush Measurement Tool Setup Page 3 7 2 3 Sharp Edge To locate a sharp edge set the nominal radius to 0 and use the Minimum Depth to define the minimum depth for the edge Figure 2 Correct Edge Detected with Minimum Depth Set to 10mm left and 0mm right The Edge Angle should be set to 90 degrees for a sharp vertical edge If a sharp edge has a slope the angle should be set
4. ossible 2 6 Multiple Gap like Feature within the Active Area This could occur when the laser line spans multiple gaps within its field of view A typical example is when the laser covers the car body and the chrome frame around the window Application Note Gocator Gap and Flush Measurement Tool Setup Page 5 7 Guidelines Figure 6 Example of when Multiple Gaps Exists within the Field of View User should use set the active area or the measurement region such that only the target gap is within the field of view When this is not possible use the Maximum Gap Width to filter out the undesired gap This is only applicable to when the target gap is narrower than the other gaps Figure 7 Corrected Edge Selected with Max Gap Width Set to 12mm a 3D MEASUREMENT amp CONTROL MADE EASY Gocator 2000 2300 Appnote_Gap_Flush_Setup_Guideline doc www JImi3D com Application Note Gocator Gap and Flush Measurement Tool Setup Page 6 7 Guidelines Ly tL Figure 8 Incorrect Edge Picked up With Maximum Gap Width Set o 0 2 7 Paint Flakes and Plastic Surface Paint flakes or very rough surface could significantly affect reflection characteristics along the laser line This causes bump and dips to appear along the laser line Figure 9 Irregular Reflection Caused by Paint Flakes Left or Rough Plastic Surface Right ee re iaa ee aii eo pe Tee ee Figure 10 Effects of Paint Flakes on the Laser Line Reflec
5. tion 3D MEASUREMENT amp CONTROL MADE EASY Gocator 2000 2300 Appnote_Gap_Flush_Setup_Guideline doc www imizD com Guidelines Epp Figure 11 Edge with Void Width Max set to Omm left and 5mm right y Application Note Gocator Gap and Flush Measurement Tool Setup Page 7 7
Download Pdf Manuals
Related Search