非接觸全場動態(tài)應變測量系統(tǒng)

Non-Contact Full-Field Dynamic Strain Measurement System

高達500,000幀/秒的圖像采樣速度 Up to 500,000 frames per second.

系統(tǒng)概述 VIC-3D™ High-Speed System Overview

VIC-3D高速（HS）數(shù)字圖像相關系統(tǒng)是一種用于全場形狀，位移，速度，應變等的高速測量系統(tǒng)。 可提供幀速率從1,000到500,000 Hz的不同級別方案，并且可根據(jù)您的應用和預算進行配置定制。 另外還可以參閱VIC-3D Ultra High-Speed system page頁面，了解達5MHz的幀速率方案。 我們的系統(tǒng)通過采集軟件VIC-Snap HS與其支持的高速攝像機進行了精簡和集成，使用戶可以輕松獲取校準和測試圖像，無縫地同步控制圖像采集并以正確的格式保存，以便在VIC-3D中進行快速數(shù)據(jù)分析。 此外，VIC-Snap HS可以通過附帶的數(shù)據(jù)采集系統(tǒng)，以模擬信號的形式逐幀同步記錄外部的加載或位移數(shù)據(jù)信息。

The VIC-3D High-Speed (HS) Digital Image Correlation system is a high-speed measurement system for full-field shape, displacements, velocities, strains, and much more.  Systems with frame rates from 1,000 to 500,000 Hz are available, and configurations are customized to your applications and budget.  See the VIC-3D Ultra High-Speed system page for frame rates up to 5MHz. Our systems are streamlined and integrated with supported high-speed cameras with acquisition software VIC-Snap HS, which allows the user to acquire calibration and test images with ease.  Synchronized images are seamlessly acquired and saved in the correct format for fast data analysis in VIC-3D.  Furthermore, VIC-Snap HS enables external analog data to be recorded via an included data acquisition system synchronizing load or displacement data frame-by-frame.

除*集成控制的高速攝像機外，VIC-3D HS系統(tǒng)還包括標準VIC-3D系統(tǒng)的所有優(yōu)點，如跟蹤并計算視場內(nèi)每個數(shù)據(jù)點（像素子集）的形狀、運動和應變。 由于該數(shù)據(jù)是以三維方式計算的，因此可以直接測量平面外位移，從本質(zhì)上消除偏差影響。 其所有的計算都可以通過VIC軟件套件快速自動完成。

The VIC-3D HS system includes all the benefits of the standard VIC-3D system in addition to fully-integrated high-speed cameras. Shape, movement, and strain are tracked and computed for every data point (pixel subset) within the field of view.  Since this data is calculated in three dimensions, out-of-plane displacements are measured directly, essentially eliminating bias. All calculations are done quickly and automatically with the included VIC software suite.

技術概述 Technology Overview

高速攝像機對于高速事件的定性評估非常有用; 然而，當使用不適合的處理軟件從圖像獲取定量數(shù)據(jù)時可能非常繁瑣。 運動跟蹤軟件某種程度上可以幫助解決這個問題，但也只能跟蹤定義點的運動，而且通常不太準確。 由于VIC-3D HS系統(tǒng)分析基于樣品表面的散斑圖案，其捕獲全視場數(shù)據(jù)并測量局部應變區(qū)域就變得更加容易。作為額外的好處，VIC-3D還集成了標志點追蹤功能。 如果僅在目標點處需要測量位移，例如碰撞測試假人的頭部或四肢，則此功能會非常有用。 包括（但不限于）碰撞測試、安全氣囊展開、振動分析、鳥撞試驗、彈道試驗、爆炸試驗、跌落試驗、Hopkinsen(Kolsky)桿測試、斷裂力學研究等等。

High-Speed cameras are very useful for the qualitative assessment of high speed events; however, it can be very tedious to obtain quantitative data from images without good software.  Motion tracking software helps with this problem, but can only track movement at defined points, and is generally less accurate.  Since the VIC-3D HS system analyzes a speckle pattern which is applied to the surface of the specimen, full-field data is captured and local strains area easily identified and measured.  VIC-3D also includes FREE integrated marker tracking capabilities, as an added benefit.  This can be useful if displacements are only needed at select points, such as the head or limbs on a crash test dummy.  Common dynamic applications for this powerful system included (but not limited to) crash testing, air bag deployment, vibration analysis, bird strike tests, ballistic events, explosive events, drop tests, Kolsky bar test, fracture mechanics, and much more.

系統(tǒng)特性 System Features

以下是VIC-3D HS系統(tǒng)的一般特性; 但是，系統(tǒng)配置根據(jù)具體用途會有所差異。 請隨時致電我們來討論您的應用需求，因為我們的目標是提供*您的準確需求的系統(tǒng)。

Below are the general features of the VIC-3D HS system; however, system configurations do vary.  Please call us to discuss your applications as it is our goal to provide you with accurate information about every system that is right fit for you.

• 3D坐標，位移，速度和完整應變張量的全場測量
• 幀速率可高達500,000 fps，分辨率可高達4.0 MP
• 平面內(nèi)測量分辨率：高達0.01像素
• 平面外測量分辨率：高達0.02像素
• 應變精度高達局部0.01％，全局0.005％
• 應變范圍從0.01％到超過2000％
• 自動校準
• 使用CSI專有的Vic-Snap HS圖像采集軟件可以輕松控制高速攝像機，以評估和控制實驗全過程的精度
• *的數(shù)據(jù)可視化工具
  • 數(shù)據(jù)云圖顯示可以覆蓋在測試樣本的圖像上
  • 根據(jù)用戶定義的線條，圓或點從3D圖中提取數(shù)據(jù)
  • 用于統(tǒng)計分析、應力 - 應變曲線等數(shù)據(jù)的后處理工具
• 一年的技術支持和軟件升級。
  • 7*24小時提供實時技術支持
  • 同時提供現(xiàn)場支持和咨詢
• 標準的兩年硬件更換保修。

• Full-field measurements of 3D coordinates, displacements, velocities, and complete strain tensors
• Frame rates up to 500,000 fps, resolutions up to 4.0 MP
• In-plane measurement resolution: up to 0.01 pixels
• Out-of-plane measurement resolution: up to 0.02 pixels
• Strain resolution up to 0.01% local, 0.005% global
• Strain ranges from 0.01% to over 2,000%
• Automatic calibration
• High-speed cameras can be easily controlled using our proprietary Vic-Snap HS image acquisition software
• Powerful tools for visualizing data
  • Contour displays which can be overlaid onto images of the test specimen
  • Data extraction from 3D plots based on user defined lines, circles or points
  • Post-processing tools for statistical analysis, stress-strain curves, and more
• One year of technical support and software upgrades.
  • Live technical support is available Mon-Fri 9am-5pm EST.
  • On-site support and consulting is also available.
• Standard two year replacement warranty for defects in materials and/or workmanship on all parts.

系統(tǒng)參數(shù) System Specifications

以下是常見VIC-3D HS系統(tǒng)配置的規(guī)格 Below are the specifications for common VIC-3D HS system configurations:

* Specifications may vary depending on camera selection.

應用案例 Application Example

由于復雜的測試設置和高數(shù)據(jù)采集速率的需要，在高速動態(tài)壓縮試驗中研究金屬的力學特性一直具有挑戰(zhàn)性。 目前，有關變形速度在10?500s-1應變率下的文獻很少。 利用高速攝像機，VIC-3D HS系統(tǒng)可以高精度地量化整個區(qū)域的三維表面位移和應變。 由于其高精度、高靈活性和易用性，數(shù)字圖像相關（DIC）近年來在這樣的高速應用中已經(jīng)廣泛流行。

Studying the behavior of metals during a high-speed dynamic compression event has always been challenging due to the complex test set up and fast data capture rates required. Currently, very little literature is available regarding deformation behavior at strain rates of  10 to 500s^-1. Utilizing high-speed cameras, the VIC-3D HS system can be used to quantify the surface displacements and strains in three dimensions over the entire field with great precision. Digital Image Correlation (DIC) has gained widespread popularity over recent years in such high-speed applications due to its high accuracy, flexibility and ease of use.

在這個案例中，一個6mm直徑的金屬圓柱形樣品以50s-1的應變速率被壓縮。 VIC-3D HS系統(tǒng)用于捕捉實驗過程中樣品表面的位移和應變。 通過樣本制備隨機散斑圖案，使VIC-3D分析軟件能夠輕松追蹤變形到亞像素精度。 盡管高速攝像機能夠使用更高的采集速率，但在此次測試中，它們被設置為14,400fps的適當幀率，以達到實驗過程中獲取足夠數(shù)量的圖像的同時空間分辨率。 圖像采集器在1024 x 400像素的分辨率下進行后觸發(fā)控制。 碰撞發(fā)生后，圖像被傳輸?shù)接嬎銠C的硬盤，然后使用VIC-3D分析軟件進行后處理。

In this example, a 6mm diameter cylindrical specimen was compressed at a strain rate of 50s^-1. The VIC-3D HS system was used to capture the  surface displacements and  strains on  the  specimen during the event. A random speckle pattern is applied to the specimen that allows the analysis software to easily track the deformation to sub-pixel accuracy. Although the high- speed cameras are capable of much higher capture rates, for this test they were set to an appropriate frame rate of 14,400fps to maximize spatial resolution while acquiring an adequate number of images during the event. The cameras were post-trigger at a resolution of 1024 x 400 pixels. After the event, the images are transferred to the computer’s  hard  drive, and  then  post-processed using VIC-3D analysis software.

圖片由俄亥俄州立大學的Amos Gilat和Jeremy Seidt提供  Images courtesy of Amos Gilat & Jeremy Seidt at Ohio State University.

更多信息 More Information

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