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GOM Inspect - Evaluation Software for 3D Measurement Data

GOM Inspect - Evaluation Software for 3D Measurement Data

GOM Inspect is a software for analyzing 3D measuring data from fringe projection or laser scanners, coordinate measurement machines (CMM) and other measuring systems. The GOM software is used in product development, quality control and production.

GOM Inspect Overview

Data Import - Interfaces

  • Polygon Meshes from Point Clouds
  • 3D Mesh Processing
  • CT Import
  • CAD Import

3D meshes for parts and components are calculated from 3D point clouds for visualization, simulation, surface reconstruction and nominal-actual comparison. The meshes are also suited for virtual assembly based on measurements from different sources. The precise polygon meshes can be exported to several standard formats such as STL, G3D, JT Open, ASCII and PLY. Polygon meshes can be exported in STL format for applications such as 3D printing.

Polygon meshes can be smoothed, thinned and refined. In addition, holes in the mesh can be filled and curvatures can be extracted. The mesh is processed using curvature-based algorithms and tolerances. The software provides the user with a live preview of each processing step. Furthermore, a golden mesh can be determined by finding the best mesh or calculating an average mesh.

Scanned volume models can be directly visualized and evaluated in the software. Volume data captured by computer tomographs can be imported via drag & drop in common formats (.vgi, .vgl, .pcr, .exv, .rek) or as raw data and can be directly evaluated. In addition, the different materials of a scanned object can be imported as separate surface meshes. Besides separately scanned objects, the software also allows importing data sets including several objects that were scanned with one CT simultaneously. Up to 32 objects can be imported as individual meshes at once. The GOM Inspect software offers different polygonization modes for importing data.

Neutral CAD formats such as IGES, JT Open and STEP as well as native formats like CATIA, NX, Solidworks and Pro/E can be imported into GOM Inspect Professional at no extra costs. The individual data formats are imported via drag & drop and are automatically identified and assigned by the software.

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Full-Field Analysis - Deviation Plots Derived from Point Cloud

  • FTA / PMI
  • GD&T Analysis
  • Alignments
  • Nominal-Actual Comparison

In concepts such as PLM (Product Lifecycle Management), as much process and part information as possible is gathered in the form of PMI (Product Manufacturing Information) to ensure a comprehensive and company-wide management and control of production chains. GOM supports interfaces for digital transfers of inspection features. Quality criteria and datum systems that were implemented by a semantic construction into the CAD can be transferred digitally and evaluated in a context-sensitive way. Since the inspection plan is generated directly during the CAD import, additional work-intensive programming is not necessary.

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Corresponding GD&T elements are, for example, planarity, parallelism or cylindricity. Both, a standardized analysis of 2-point distances and of the maximum material requirement as well as the position tolerance in local datum and coordinate systems are possible. GOM supports ISO standards as well as ASME standards and continuously implements updates of the standards into the software.

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The GOM 3D software includes all standard alignment functions. These include: RPS alignment, hierarchical alignment based on geometric elements, alignment in a local coordinate system, alignment by reference points as well as various best-fit methods, such as global best-fit and local best-fit. Customers can also use their own specific alignments such as “Balanced beam” or “Equalized nested”, for example, for turbine blades.

The computed polygon meshes describe freeform surfaces and standard geometries. These can be verified by comparing surfaces with a technical drawing or directly with a CAD data set. A 3D analysis of surfaces as well as a 2D analysis of sections or points can be implemented in the software. CAD-based generation of geometric elements such as lines, planes, circles or cylinders is also possible.

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Application-Specific Analyses - Functions for Special Tasks

  • Point-Based Inspection
  • Curve-Based Inspection
  • Motion and Deformation Analysis
  • Airfoil Inspection
  • Inspection of Surface Defects

The evaluation function can also be used for point clouds. This includes, for example, measurement of distances between individual points and a comparison of points with the CAD model. Construction functions can then be applied to create standard geometries based on several points. This allows an analysis of dimensional accuracy or a GD&T analysis on the generated elements, including flatness, cylindricity or positional accuracy.

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GOM Inspect Professional closes the gap between point-based and surface-based inspection. Full-field digitized data is used to apply construction functions for curves and to visualize their individual properties. Edge curves can, for example, be captured, radii and character lines analyzed and spline curves created. Flush & gap analysis is another element provided in curve-based inspection.

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Analysis of motion and deformation is carried out using a component concept. Points are divided into coherent groups and defined as components. Transformations or corrections to rigid body movements can then be calculated for these components. The 6DoF analysis serves to determine the translation and rotation movements in all directions. Vector fields then help to visualize point movements and deformation over time.

GOM Inspect Professional combines general inspection functions with application-specific evaluations. Native quality control functionality for the analysis of airfoils and turbine blades include: inspection of profile mean line, profile centroid and profile thickness of turbine blades based on 2D sections. The profile’s center of gravity, radii and twist can also be calculated.

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Optical metrology allows a series-accompanying and reproducible evaluation of surface defects. The results are objective and available in a shorter time than with the conventional method of the grind stone. For the surface defect map to match the form of the part directly, the GOM Inspect software makes an inspection of surface defects even in curved directions possible. Furthermore, the software computes the direction of the surface normals automatically. Only one defect map is required to inspect large areas that are to be analyzed in the same direction according to the inspection plan.

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Visual Programming: Evaluations – Measurements – Workflows

  • Parametric Inspection
  • Teaching by Doing
  • Trend, SPC and Deformation Analysis
  • Reporting
  • Kiosk Interface
  • Virtual Measuring Room (VMR)

The GOM software is based on a parametric concept, which forms the underlying foundation for every function. This parametric approach ensures that all process steps are traceable, thus guaranteeing process reliability for measuring results and reports.

With Teaching by Doing, any completed evaluation can be easily applied to two or more parts. Thanks to the parametric design, the software automatically stores each individual inspection step. There is no difference between single and multiple evaluations. All evaluation steps can be operated without scripting, previous planning or user intervention, so that no time is spent on programming.

The underlying parametric concept of the GOM software enables a trend analysis for multiple evaluations, for example, in statistical process control (SPC) or for deformation analysis. This enables full-field evaluation of several parts or stages within a single project and offers functionalities for determining statistical analysis values such as Cp, Cpk, Pp, Ppk, Min, Max, Avg and Sigma.

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The reporting module allows creating reports including snapshots, images, tables, diagrams, text and graphics. The results can be visualized and edited in the user interface and then exported as a PDF document. Templates are reusable and each scene saved in a report can be restored in the 3D window.

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The Kiosk Interface is a special user interface for a simplified control of the ATOS ScanBox. The software handles the entire process control and performs the measuring and inspection procedure automatically ensuring high precision and data quality: measurement parameters, data, and the operating system are protected.

The VMR is a virtual, yet functional representation of the real world. The VMR is a fully integrated solution, allowing for the complete reproduction of automated measurement processes. Combining the parametric inspection processes offered by GOM Inspect Professional, the VMR enables the execution of automated measurements: import of measurement plans, offline and online programming, 3D measurement simulation, collision control, safety, data capturing, inspection and reporting.

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GOM Software certified by PTB and NIST

In order to ensure precise measurement accuracy, both GOM Inspect Professional and GOM Inspect software have been tested and certified by PTB and NIST institutions. The accuracy of the evaluation software is tested by comparing the results from the software with reference results. The GOM software has been placed in Category 1, the category with the smallest measurement deviations.


Comparison GOM Inspect and GOM Inspect Professional

GOM Inspect
  • Polygonize Scanner Data
  • Mesh Processing
  • CAD Import Basis
  • Import/Export Measurement Data
  • Traceability
  • Alignments
  • CAD Comparison
  • GD&T Analysis
  • Trend Analysis
  • Airfoil Inspection
  • Inspection of Surface Defects
  • Curve-Based Inspection
  • Point-Based Inspection
  • Reporting

 

GOM Inspect Professional GOM Inspect Enterprise

All Features from GOM Inspect

Additional FEATURES

  • CAD Import Native
  • Parametric Inspection
  • Teaching by Doing
  • Creating Trend Projects
  • Scripting
  • Templates
  • Virtual Measuring Room (Additional Modules)

All Features from GOM Inspect and GOM Inspect Professional

Additional FEATURES

  • Flexible Solution for Network Licenses

The free GOM Inspect software is also a viewer for all measurement results that are created with GOM Inspect Professional.


Sample Data - Data sets as learning and for different applications

Inspection Essentials

This sample project gives you an overview over the essential functionalities of GOM Inspect - beginning with a simple inspection via surface deviation, over curve based evaluation and point based analysis, up to the handling of different alignments. It also contains examples of drawing based dimensioning, GPS tolerances and material thickness inspection.

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GOM_Part_Inspection_Essentials.ginspect (49 MB)

Trend Analysis

This sample project shows how several parts are handled and compared within a project. Several stages can be used for trend analyses and statistical process control. The evaluation contains statistical color plots for range and sigma, and shows SPC parameters. Furthermore, the trend is displayed using tables and diagrams.

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GOM_Part_Trend_Analysis.ginspect (115 MB)


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Tutorials

Video tutorials offer an introduction to the GOM Inspect software features. 

User Interface

This first tutorial gives you an overview of the graphical user interface including 3D view, explorer and reporting. It briefly introduces all major software concepts.

Data Import

This video shows you how to import data, such as CAD files, point clouds and finally volume data from computer tomographs.

Simple Inspection

This episode demonstrates a typical simple inspection workflow. It shows you how to perform an alignment, create a surface comparison and document the results in a report page.

Dimensional Inspection

This video covers the dimensional inspection on both actual and nominal data.

Trend Projects

This tutorial explains additional software concepts for trend projects. The video covers the timeline, diagrams and tables as well as videos in reports.

Reporting

The last tutorial gives you a more detailed insight in all reporting options, like updating report pages, working with templates and exporting reports.

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