Workswell Active ThermoInspector (“Workswell ATI”) is an NDT (Non-destructive testing) system operating on the principles of what is known as active thermography.
In its basic configuration, the Workswell ATI system consists of a lamp (light / optical excitation source), a supply source and a thermal camera and a system controller. The light from the lamp is flashed which thermally excites the material under inspection. The thermal reaction of the investigated material is recorded by the camera. The resulting image recorded by the thermal camera is displayed in an infra-red spectrum is then processed and analysed by the computer program which detects and analyses the defects. The software can apply all conventional algorithms to the produced sequence:
- Thermographic signal reconstruction (TSR),
- Differential absolute contrast (DAC),
- Pulsed phase thermography (PPT),
- Higher order statistics thermography (HOST),
- Principal component thermography (PCT).
The system can also export into the most up-to-date algorithms such as FFT, PCA, and high order statistics. The measured data can be exported and consequently processed in software such as Matlab, Mathematics etc.
It is recommended to use the Workswell CorePlayer software to analyse the produced data, which is included and delivered with the alternative thermology stystem.
Active infra-red thermography is a technology for non-destructive testing, which uses an external energy source to induce (excite) the thermal difference between defected and undamaged areas in the sample being tested. A wide range of energy sources are used, and the most frequent types can be divided into lighting (optical), mechanical, and inductive. The breakdown of active thermography approaches is displayed in the image.
When using optical excitation, defects are simulated by lighting energy which is transferred onto the surface of the sample where there is a thermal effect on the material. Thermal changes are spread from the surface into the volume of the sample. Optical excitation devices include photographic flashes (implementing the so-called Dirac’s impulse), infra-red lamps (implementing the so-called unit jump – pulsed thermography) or halogen lamps (lock-in thermography) and others (see image).
The Workswell ATI based system is modular and can be delivered in various configurations, such as different types of thermal camera (LWIR, MWIR, high-speed thermal camera, etc.), as well as different types of excitation sources (optical exit, electromagnetic excitation or mechanical excitation) and other equipment.
As an example, the most popular Workswell ATI-6000 system consists of a thermal camera (LWIR or MWIR) and a light source for optical excitation and lock-in thermography.
The Workswell ATI-6000 package contains:
- 1x optical excitation source
- 1x supply source (generator)
- 1x system control unit with touchscreen
- 4x protective gloves and glasses
- 1x thermal camera LWIR (optional MWIR)
- 1x keyboard
- 1x flash drive
- 1x tripod for the thermal camera
- 1x tripod for light
- 2x transport boxes
|Resolution||640 x 480 pixel camera head|
|-40°C to +650°C (2 subranges)|
|Temperature ranges||(optional up to 2 000°C with special filter)|
|Accuracy||±2% or ±2°C|
|Temperature sensitivity||≤0.03°C (30mK) @ 30°C|
|Spectral Range||7.5 – 14 μm|
|Dynamic range||14bit radiometric temperature data, 14bit RAW data|
|Calibration||Yes, calibrated both temperature ranges|
|Detector Type||Uncooled microbolometer|
|Lenses||Interchangeable and focusable, various field of view|
|Available Lenses||25° or 45° lens (standard 25° lens)|
|Remote Control||Full remote control via GigE interface from Touchscreen analysis Industrial PC|
|Mobile Flash source generator||6000 J Power Pack, Sync function, 20kg weight|
|Industrial PC controller for direct Lamp and Thermographic system control,|
|Signal generator for direct Flash Thermography control, Installed operating|
|Lamp control||system and full control software for Active Flash Thermography analysis,|
|Thermography CorePlayer software included|
|Lamp head||Halogen 6000 J Flash head|
|Analysis software features|
|Recording||Full radiometric video sequence recording, opening, playing, etc|
|Measurement functions, ROI analysis, FFT calculation, Statistical quantitative|
|Analysis||evaluating, MAX MIN, Filtering, Averaging, etc|
|History and Logging||Full user history logging, data saving and data management|
|GUI||Graphical user interface, visualization and indicator panel|
|Reporting||Multipage PDF reporting, IR image, Graph and text reporting|
|Project||User project and file editing and creating|
|Operating temperature||-0°C to +45°C|
|Storage temperature||-20°C to +60°C|
|Humidity||5% to 95% non-condensing|
|Content of delivery||Infrared camera, Lamp heads, Power pack source, cables, Industrial
Computer and signal generator, calibration certificate, Active thermography
software, transport cases
Workswells CorePlayer software has been designed to perform detailed analysis and allow a user to edit, export data to different formats, and create comprehensive reports from thermograms. All standard functionalities for analysing data are available within the program (temperature on the spot, minimum and maximum of the area, temperature profile, zoom, change in temperature scale, color palette, emissivity etc.) as well as extending functions such as the GPS location of where the picture was taken and being able to display full spectrum digital pictures. See the data list for further information on all functionalities.