Thermavip

CEA-IRFM has gained in-depth expertise at using imaging diagnostics to understand quick-ageing and damaging of materials under high thermal stresses. This knowledge has been used to developp the ThermaVIP (Viewing Imaging Platform) software platform, initially designed for the exploitation of infrared thermography diagnostics in fusion tokamaks. This software platform, which required 8 years of development, is made up of a set of modules allowing the exploitation of imaging diagnoses in a complex measuring environments.

Thermavip is mainly dedicated to operational safety, quality control and comprehension of high-temperature processes in several fields. It is currently used for offline and real-time analaysis of multi-sensor data in tokamaks.

For offline diagnostic data analysis, Thermavip provides tools for:

• Data browsing/searching based on a database of signals,
• Synchronization and visualization of heterogeneous sensor data (images, videos, 1D + time signals,...),
• Extracting statistics within videos/signals,
• Applying predefined/custom processings to videos/signals,
• Performing signal fusion processings,
• Recording any kind of sensor/processed data to share with partners.

For real-time exploitation of sensor data, Thermavip provide tools for:

• Defining asynchronous processing pipelines on distributed architectures,
• Recording any kind of sensor data within a single or multiple archives,
• Online/multiscreen displaying of several videos and temporal signals,

Below screenshot shows an example of software built based on Thermavip SDK for the post analysis of WEST sensor data:

Thermavip is based on a versatile software architecture composed of a C++ Software Development Kit (SDK) and a plugin mechanism based on Qt only. Currently, the SDK is composed of 6 libraries:

• Generic libraries that can be used outside Thermavip application, like any third party library:

  • Logging: logging to file/console/GUI tools
  • DataType: base data types manipulated by Thermavip (N-D arrays, vector of points, scene models...)
  • Core: asynchronous agents library based on dataflow, archiving, plugin mechanism
  • Plotting: high performance plotting library for offline/firm real-time display of multi-sensor data

• Libraries strongly connected to Thermavip application:

  • Gui: base graphical components (main window, players...)
  • Annotation: graphical components used to annotate IR videos, upload annotations to JSON files or to a MySQL/SQLite DB, query and display annotations from a DB.

The basic Thermavip application, without plugins, provides at least the necessary features dedicated to video annotation. Note that this requires to build Thermavip with the librir library (see build notes).

Prerequisites

To compile and run Thermavip, you need a valid Qt installation (starting version 5.9). Qt needs to be compiled with the desktop opengl option, and with mysql support if you wish to use the Annotation library with a MySQL database.

You can download Qt source code from this website.

Note that Thermavip will compile and run on almost any platform supporting Qt, including Windows and all Linux distributions.

Default plugins shipped within the git reprository rely on the HDF5, CPython and Ffmpeg libraries, and are NOT compiled by default.

Compilation

Thermavip compilation relies on cmake. See this page for more details.

Authors

• Victor MONCADA (victor.moncada@cea.fr)
• Léo DUBUS (leo.dubus@cea.fr)
• Erwan GRELIER (erwan.grelier@cea.fr)

The software has been built with the collaboration and intensive testing of:

• The CEA/IRFM which develops and maintains Thermavip,
• The Greifswald branch of IPP for the Wendelstein 7-X Stellarator,
• The ITER-CODAC team.

Related publications

• V. Moncada et Al., «Software platform for imaging diagnostic exploitation applied to edge plasma physics and real-time PFC monitoring», Fusion Engineering and Design, Volume 190, 113528, ISSN 0920-3796, 2023
• E. Grelier et Al., «Deep Learning-Based Process for the Automatic Detection, Tracking, and Classification of Thermal Events on the In-Vessel Components of Fusion Reactors,» Proceedings of the 32nd Symposium on Fusion Technology, 2022.
• E. Grelier et Al., «Deep Learning and Image Processing for the Automated Analysis of Thermal Events on the First Wall and Divertor of Fusion Reactors,» Plasma Physics and Controlled Fusion (2022).
• H. Roche et Al., «Commissioning of the HADES - High heAt loaD tESting - facility at CEA-IRFM,» Proceedings of the 32nd Symposium on Fusion Technology, 2022.
• Y. Corre et Al., «Thermographic reconstruction of heat load on the first wall of Wendelstein 7-X due to ECRH shine-through power,» Nuclear Fusion, vol. 61, n° %1066002, 2021.
• A. Puig Sitjes et Al., «Wendelstein 7-X Near Real-Time Image Diagnostic System for Plasma-Facing Components Protection,» Fusion Science and Technology, vol. 74(10), pp. 1-9, 2017.
• M. Jakubowski et Al., «Infrared imaging systems for wall protection in the W7-X stellarator (invited),» Review of Scientific Instruments, vol. 89, n° %110E116, 2018.

Acknowledgments

Thermavip SDK and plugins are shipped with raw/modified versions of a few libraries:

• ska_sort is used for fast sorting of numerical values
• The Plotting library of Thermavip SDK is a heavily modified version of qwt library.
• The Image Warping processing uses a modified version of this Delaunay library written by Ken Clarkson.

Thermavip framework and this page Copyright (c) 2023, CEA/IRFM