VIC-3D IR System
Non-Contact Full-Field Thermal and Strain Measurement System
VIC-3D红外系统可方便地同时采集白光和红外图像，以进行热和表面应变分析。 数字图像相关技术（DIC）的应变数据现在可以与IR温度数据同步和标定。 这个完全集成的系统能够精确地同时标定白光与红外两个成像系统，使温度和应变数据可以在同一个坐标系中精确显示。 该系统为交钥匙方式提供，可随时使用，包括现场安装。 温度成像功能也可以通过升级而添加到用户现有的任何VIC-3D系统中以提高功能。 有关此产品的更多详细信息以及查看应用示例，请下载我们的VIC-3D红外系统手册。
The VIC-3D IR system conveniently allows white light and IR images to be simultaneously acquired for thermal and surface strain analysis. The digital image correlation (DIC) strain data can now be synchronized and calibrated with IR temperature data. This fully integrated imaging system accurately calibrates the two imaging systems so temperature and strain data are accurately displayed in a common coordinate system. The system is turn-key and ready to use right out of the box, and includes onsite installation, and one year of unlimited technical support with every purchase. The thermal imaging capability may also be added to any existing VIC-3D system for increased functionality. For more details about this product, and to see an application example, please download our VIC-3D IR System brochure.
技术概述 Technology Overview
VIC-3D红外系统是3D数字图像相关系统产品的新成员。 VIC-3D红外系统将红外（IR）摄像头与白光DIC摄像头集成在一起，使温度数据可以与全场应变数据一起进行精确分析。该系统通过将来自IR相机的图像与来自3D DIC系统的图像采集同步，然后标定所有三个相机以使得温度和应变数据处于同一坐标系中来工作。使用VIC-Snap IR软件可以简化该标定过程，该软件允许用户采集同步的单张IR图像进行标定，并以恒定速率采集多张图像进行准静态测试。其成果就是易于使用的交钥匙温度/应变耦合测量系统，它利用数字图像相关技术来同时准确测量温度和应变，而无需与试件接触。温度和应变数据可以在整个区域或指定位置进行查看、分析和提取。
The VIC-3D IR System is a new addition to the 3D digital image correlation system. The VIC-3D IR System integrates an infrared (IR) camera with the white light DIC cameras enabling temperature data to be accurately analyzed alongside full-field strain data. The system works by first synchronizing images from the IR camera with images from the stereo DIC system, and then calibrating all three cameras so that the thermal and strain data are in a common coordinate system. This calibration procedure has been streamlined using the VIC-Snap IR software, which allows the user to capture synchronized single images for calibration, and multiple images at a constant rate for quasi-static testing. The result is an easy to use turn-key thermal imaging system that utilizes the digital image correlation technology to accurately measure temperature and strain concurrently without any contact with the sample. Thermal and strain data can be viewed, analyzed, and extracted over the entire field or at precise locations.
• Temperatures up to 1,760°C
• Synchronized IR and DIC images
• User-friendly setup and calibration
• Uniquely designed IR calibration targets
• Analog data synchronization
• Extract points, regions, or nodes locations for FEA validation
• Accurately measure deformation and thermal data concurrently
• Remotely view and acquire images using the Vic-Snap remote
• Measure 3D full-field displacements and strains
• All the features for the VIC-3D system included
温度场DIC应用 Thermal DIC Applications
Whether working with metals, composites, ceramics, or biological specimens, thermal testing is a growing field for many researchers and engineers in academia and commercial industries. Temperatures ranging from -40C to 1,760C can be measured with great accuracy. Some examples of high-heat applications include (but are not limited to) the following:
• Heat-induced softening of steel
• Blistering and delamination in composites
• Strain induced heating in polymers
• Correlating heat transfer and strain distribution during bonding/debonding
• Matrix and fiber or particulate composite testing
There are many other possible thermal applications where this measurement system may be used. If there is a need to measure full-field displacements and strains concurrently with temperature data, then this is the right system or you.
E-glass/Vinyl Ester/Balsa Wood Sandwich Composite Application Example
Understanding thermo-mechanical behavior of material can be a vital component when designing vehicles and structures that may become exposed to high temperatures. Virginia Tech’s Extreme Environments, Robotics, and Materials (ExtReMe) Laboratory focuses on the impact of extreme environments on materials. This includes research that is focused on understanding the thermo-mechanical behavior of materials both during and following fires. Experimental investigations are performed to understand the evolution of the material due to elevated temperature.
The senior research associates in the lab used the VIC-3D IR system to find the effects of a simultaneous one-sided heating and compressive loading test on an e-glass/vinyl ester/balsa wood sandwich composite sample. As one researcher stated, “The VIC-3D IR system identified several transient events during the compression tests which would not have otherwise been fully understood using either DIC or IRT independently. Through this testing, several features of sandwich composite thermomechanical behavior were elucidated which would not have been possible with traditional point measurements (i.e., strain gages, deflectometers, or thermocouples).”
The data in the images and graphs below display the strain and temperature data extracted from the two locations C1 and C2. The strains peak at the highest temperature, and then become smaller as the surface cools when the sample’s surface delaminates and blisters.
纵向应变 Longitudinal Strain (Exx)
来自红外相机的温度场数据 Temperature Data from IR Camera
应变-温度与时间对应关系 Strain & Temperature ve. time
温度与应变数据视频 VIC-3D extraction video of temperature and strain data