溫度場耦合測量系統(tǒng)
VIC-3D IR System
非接觸溫度場/應(yīng)變場耦合測量系統(tǒng)
Non-Contact Full-Field Thermal and Strain Measurement System
VIC-3D紅外系統(tǒng)可方便地同時采集白光和紅外圖像，以進(jìn)行熱和表面應(yīng)變分析。 數(shù)字圖像相關(guān)技術(shù)（DIC）的應(yīng)變數(shù)據(jù)現(xiàn)在可以與IR溫度數(shù)據(jù)同步和標(biāo)定。 這個*集成的系統(tǒng)能夠精確地同時標(biāo)定白光與紅外兩個成像系統(tǒng)，使溫度和應(yīng)變數(shù)據(jù)可以在同一個坐標(biāo)系中精確顯示。 該系統(tǒng)為交鑰匙方式提供，可隨時使用，包括現(xiàn)場安裝。 溫度成像功能也可以通過升級而添加到用戶現(xiàn)有的任何VIC-3D系統(tǒng)中以提高功能。 有關(guān)此產(chǎn)品的更多詳細(xì)信息以及查看應(yīng)用示例，請下載我們的VIC-3D紅外系統(tǒng)手冊。
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.
技術(shù)概述 Technology Overview
VIC-3D紅外系統(tǒng)是3D數(shù)字圖像相關(guān)系統(tǒng)產(chǎn)品的新成員。 VIC-3D紅外系統(tǒng)將紅外（IR）攝像頭與白光DIC攝像頭集成在一起，使溫度數(shù)據(jù)可以與全場應(yīng)變數(shù)據(jù)一起進(jìn)行精確分析。該系統(tǒng)通過將來自IR相機(jī)的圖像與來自3D DIC系統(tǒng)的圖像采集同步，然后標(biāo)定所有三個相機(jī)以使得溫度和應(yīng)變數(shù)據(jù)處于同一坐標(biāo)系中來工作。使用VIC-Snap IR軟件可以簡化該標(biāo)定過程，該軟件允許用戶采集同步的單張IR圖像進(jìn)行標(biāo)定，并以恒定速率采集多張圖像進(jìn)行準(zhǔn)靜態(tài)測試。其成果就是易于使用的交鑰匙溫度/應(yīng)變耦合測量系統(tǒng)，它利用數(shù)字圖像相關(guān)技術(shù)來同時準(zhǔn)確測量溫度和應(yīng)變，而無需與試件接觸。溫度和應(yīng)變數(shù)據(jù)可以在整個區(qū)域或位置進(jìn)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.
技術(shù)特性 Feautures
• 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
溫度場DIC應(yīng)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:
• 粘接/脫粘過程中的熱傳導(dǎo)與應(yīng)變分布的關(guān)聯(lián)
• 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
還有許多其他可能的熱相關(guān)應(yīng)用可能會使用這種測量系統(tǒng)。 如果需要與溫度數(shù)據(jù)同時測量全場位移和應(yīng)變，那么這正是適合您的系統(tǒng)。
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.
附：無堿玻璃/乙烯基酯/巴沙木的三明治結(jié)構(gòu)復(fù)材的溫度場與應(yīng)變場耦合測量應(yīng)用案例
E-glass/Vinyl Ester/Balsa Wood Sandwich Composite Application Example
在設(shè)計可能暴露于高溫的車輛和結(jié)構(gòu)時，了解材料的熱機(jī)械行為可能是至關(guān)重要的組成部分。弗吉尼亞理工大學(xué)的環(huán)境、機(jī)器人和材料（ExtReMe）實驗室專注于環(huán)境對材料的影響。這包括專注于了解火災(zāi)期間和火災(zāi)后材料的熱機(jī)械行為的研究。進(jìn)行實驗研究以了解由于升高的溫度引起的材料的演變。
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.
實驗室的高級研究員使用FLIR 紅外系統(tǒng)，在電子玻璃/乙烯基酯/輕木夾層復(fù)合材料樣品上找到同時進(jìn)行單面加熱和壓縮加載試驗的效果。正如一位研究人員所說，“FLIR紅外系統(tǒng)在壓縮測試過程中發(fā)現(xiàn)了幾個瞬態(tài)事件，而這些事件本身并不能通過單獨使用應(yīng)變場或紅外溫度場測量來*理解的。通過這項測試，闡明了夾層復(fù)合材料熱機(jī)械行為的幾個特征，這是傳統(tǒng)點測量（即應(yīng)變計、偏轉(zhuǎn)儀或熱電偶）無法實現(xiàn)的。
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).”
下面的圖像和圖表中的數(shù)據(jù)顯示從兩個位置C1和C2提取的應(yīng)變和溫度數(shù)據(jù)。應(yīng)變在溫度達(dá)到峰值，然后當(dāng)樣品表面分層和起泡時表面冷卻后變小。
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.
縱向應(yīng)變 Longitudinal Strain (Exx)
來自紅外相機(jī)的溫度場數(shù)據(jù) Temperature Data from IR Camera
應(yīng)變-溫度與時間對應(yīng)關(guān)系 Strain & Temperature ve. time
溫度與應(yīng)變數(shù)據(jù)視頻 VIC-3D extraction video of temperature and strain data
