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Use of High-speed Thermography in Laser High-temperature Capillary Gap Brazing

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Lasers are extremely versatile tools in industry and manufacturing technology. Due to their flexibility, they serve as a key technology for implementing the goals of industry 4.0. Although laser cutting and welding are nowadays regarded as turnkey technologies, the majority of laser applications, for example joining of hybrid materials, 3D printing or ultra-short pulse processing, still require considerable research and development.

The Laser Application Center (LAC) of Aalen University intensively researches and develops new methods of laser material processing. Thus, innovative materials for Additive Manufacturing are developed and investigated within public R&D projects, including magnetic materials or electrical energy storage materials for electromobility. Another focus is lightweight construction. Here, among other things, mixed metallic compounds and hybrid lightweight structures made of aluminium and CFRP for CO2-efficient mobility concepts are investigated. The newly developed processes aluminium laser polishing and high-temperature capillary gap brazing are already being used in industrial projects.

View Case Study ImageIR

 

A-LED 2500, more light than ever

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Lighting is such an important part of gathering useful data from your high speed tests. Having a high powered, flicker free LED light  is probably the next most important tool to the camera itself.

The new AOS A-LED 2500 high power LED system with up to 4 miniaturized heads, with 150 Watts each comes now with higher efficiency electronics getting even more light out. For all connected LED heads the controller does have overheating alerts and short circuit protection. A-LED 2500 is ready for constant or strobing illumination synchronized to most brands of high speed cameras.

The system is High-g crash proof up to 100g /11msec. It comes with a charger and all necessary cables.

Paired with the AOS M-Vit (or any of their high G range), this light source is perfect for crash test applications

Cleaning the Sensor on your High Speed Camera

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Keeping your camera sensor clean and free of debris is very important to obtaining the best images possible. If you notice smudges or other spots showing up on the image it’s possible the sensor may need to be cleaned. The tech tip will go over four methods we use here in our lab for cleaning our sensors when needed. We recommend performing the cleaning steps that remove the smudge/dirt in the least invasive way possible.

1) The first method is to use a dust removal tool such as the one pictured aside. The lens mount can be kept on for this method and simply point the tool at the sensor and give it a few good squeezes of air. If the dust/dirt still is present then move onto the next method.

These ear syringes can be purchased from most chemists and typically cost less than $10

 

2) The second method involves using compressed air. Always ensure you are using clean compressed air and that you do not point the air directly at the sensor but shoot air at it from the sides. For this method and the two that come after the lens mount will need to be removed. Remove the four black screws holding in the mount and then apply the compressed air from the side of the camera as pictured below.

Compressed air can be purchased from Jaycar or similar hardware stores.

 

3) If compressed air hasn’t removed the debris or you are dealing with a smudge on the sensor then you will have to use a lens cloth to take care of the issues. Select a high quality disposable lens cloth and ensure you use a new cloth each time you clean a sensor. With the lens mount removed, use a single quick motion across the affected area and make sure to never re-use a portion of the cloth that has already touched the sensor.

4) The last method used if none of the other methods have been successful is using isopropyl alcohol and then wiping the sensor again with a lens cloth. Please ensure to use the highest purity isopropyl alcohol while using the same single quick motion wiping method across the affected area with a lens cloth.

*Elecrtro-static Discharge  events may cause damage to the image sensor. Take extreme care when cleaning the image sensor surface

  • Always take appropriate anti-static precautions when cleaning or working near the image sensor
  • Do not use any form of cleaning equipment using electrostatic or “charged fiber” technology
  • Always discharge electrostatic discharge build up in your body by touching a grounded metallic surface before working on a camera
  • Very gently, use only clean and dry air to remove dust
  • For stubborn contamination use high grade pure IPA with optical wipes of ‘clean room’ grade
  • wipe across the sensor in a single action, to not rub to avoid abrasive damage.

 

*Tech Tip originally created by Photron USA, see all their tech tips here

Infrared Camera in Electronics and Electrical Engineering

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The use of infrared thermography in electronics and electrical industry allows contactless measurement of surface temperatures with an infrared camera without contacting temperature sensors. It is an elegant, non-invasive optical temperature measurement method for simultaneous and temporally high-resolution detection of a number of measurement points.

 

Infrared Camera Enables Contactless Measurement in Electronics

The thermographic inspection of electronic components and assemblies is an established test procedure for failure detection and quality management – from the development of first prototypes to serial production. This enables, for example, the following to be detected:

  • Hotspots and atypical temperature distributions on the surface of printed circuit boards, integrated circuits and multichip modules
  • Increased contact resistances
  • Increased resistance due to constriction of wires
  • Hidden cracks in joints
  • Power losses due to RF mismatch
  • Incorrect thermal connections of heat sinks
  • Short circuits, soldering defects such as cold solder joints

Thermographic analysis during each development step provides important conclusions for the optimisation of heat management and the design of complex electronic assemblies. In electronics production thermographic temperature measurement is used as a versatile instrument for quality assurance. High-performance thermography has become indispensable for setting critical technological parameters and their permanent monitoring as well as for inline testing of products in the production process and their final functional test.

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IR Based Fever Detection

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Major travel hubs like airports, seaports, railway stations and long-distance bus stations are one of the points on which the security measures of public authorities are aimed when infectious diseases such as Coronavirus (2019-nCoV), Severe Acute Respiratory Syndrome (SARS), Ebola Virus Disease (EVD) or Middle East Respiratory Syndrome Coro-navirus (MERS-CoV) cause global problems. From there, diseases can be effectively prevented from spreading further. InfraTec infrared cameras can be used for a corresponding thermal fever screening for passengers. Our thermographic systems enable a non-contact and areal coverage of the body temperature, which preferably is detected at the inner angle of the eye. Slightest differences and thus abnormal body tempera- tures can be displayed and will result in alarms. Performing such health screenings, e.g. via implementing temperature checkpoints, enable the acquisition of important informa- tion as a basis for decision-making for subsequent medical examinations of the selected people and thus serve to secure public areas.

Advantages of using infrared cameras for thermal fever scanning of passengers

  • Contactless and planar temperature measurement without external reference radiator
  • Large field of view for rapid checking of large groups of people
  • Resolution also of smaller areas of the skin (angle of the eye) from a safe distance
  • Display and evaluation in real time
  • Reliable temperature measurements based on low noise infrared detectors and precision calibration
  • Alarming at surpassing temperature thresholds (fever)
  • Easily installable all-in-one unit for continuous monitoring of persons and groups of people
Download Information Sheet View Product Range

Application Examples – Digital Image Correlation VIC-3D

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Evaluating the Radial Force Profile of a Stent

Data courtesy of Dr. Kenneth Perry, EchoBio, LLC.

 

Application Overview

Medical device manufacturers have the responsibility to create and maintain efficient and safe products to keep the world population healthy. Dr. Kenneth Perry of EchoBio LLC is an industry leader and expert on the experimental validation of implantable medical devices. Recently, Dr. Perry was tasked with evaluating the radial force profile of a braided, self-expanding stent for use in correcting blocked blood vessels. Dr. Perry specifically needed to examine how the radial force changed from the end of the stent to the middle of the stent. This quantitative data is critical to the proper design and function of the stent, and Digital Image Correlation was the only technology commercially available that could provide the measurements needed at the required accuracy. Dr. Perry utilized the VIC-3D system to make such measurements with valiant success that could potentially revolutionize the medical device industry.

 

Figure 1. Experimental setup using the VIC-3D system

Dr. Perry began his experiments using perfectly straight silicone tubes that were custom made to have mechanical properties similar to a blood vessel. His experimental setup is shown above in Figure 1. The experiment involved deploying the stents into the tubes and measuring the resulting deformation. Dr. Perry knew that any simplified point or line measurement on his samples would have been misleading. This is where the VIC-3D system enters the experiment and provided Dr. Perry with the full field data he needed to be confident in his measurements and publish accurate results for his client.

Figure 2. Speckled silicone tube with stent inserted.

The silicone tube was prepared for the experiment by having a speckle pattern applied by using off the shelf spray paint. The area of interest was masked off and a white base coat applied. The black speckles were then simply added by using an over spray technique with black spray paint. Figure 2 above shows the speckled silicone tube with the stent inserted.

Figure 3. Change in radius contour under load from expanded stent.

The change in radius variable and resulting contour plot was the most valuable data for Dr. Perry because it clearly shows the largest force is located near the end of the stent. This contour plot, shown above in Figure 3, also indicates areas of larger radial force that could have gone unnoticed using traditional measurement techniques.

Figure 4. 3D change in radius contour plot showing displacement vectors.

Not only did Dr. Perry obtain full-field displacement data, he was also able to easily quantify the radial force profile of the stent and show the circumferential variation that resulted from the underlying woven stent structure.  Figure 4 above shows the displacement vectors of the stent in a full-field 3D contour plot. The displacement vectors show the magnitude of the resulting deformation which allows Dr. Perry to easily interpret the data as well as publish professional results for his client. The VIC-3D system gave Dr. Perry the ability to measure with confidence.

Testimonial

“Vic-3D was an amazing tool. Any simplified line or point-wise measurement would have been misleading. Vic-3D gave us full-field data we needed to be confident with the measurements.” -Dr. Kenneth Perry, ECHOBIO LLC

“We needed robust calibration, documentation and high-fidelity measurements so we designed our experiment accordingly using the VIC-3D system.”

More on VIC-3D

Thermal Imaging at Incredible Detail

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We recently had a look at an old iPhone 6 using Infratec’s ImageIR 9400, one of the most versatile IR cameras on the market. The spatial resolution of these cameras mean that the experiment was able to measure down to 1.25µm/pixel.

         

          

 

View ImageIR

Thermal Imaging Software

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A high-quality infrared camera is the basis for successfully using infrared thermography to solve your measurement and testing tasks. However, the full potential can only be achieved with an equally powerful software. The result of Infratech’s R&D and hard work is their modular software family IRBIS® 3. Its range of functions can be configured to suit your application, so that the ideal package is available to you.

  • Modular concept for application-specific configuration
  • Compatibility with all camera models by InfraTec
  • Convenient camera control and data acquisition
  • Numerous analysis functions and tools
  • Lock-in mode for the analysis of amplitude and phase images and other complex evaluations
  • Consistent visual display of all measurement data
  • Professional compiling of thermographic reports
Find Out More

Promon Streamer G1 Now Available – Long Recored High Speed Camera System

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The Promon Streamer G1 is the perfect long record high speed camera system for the production floor across a number of industries. The compact footprint makes the Streamer a perfect system for permanent installation on a production line. Beside the high speed recording feature and the long time recording capabilities, the built-in I/Os allow control from PLC – so it’s ready when you need it. The versatile system is available in different variations such as built-in camera, with an additional external camera, or two external cameras. The control software is based on Imaging Studio v4, all features are easy configurable by the software.

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Thermal Imaging in Vet Science

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Medical examinations of animals can be carried out in an efficient way by applying infrared camera systems. Animal’s body temperature can indicate multiple health problems. These may affect the animal itself, as for instance diseases of the udder or hoof, or they result from animal husbandry, as it is in the case of an incorrect application of saddles causing pressure points and, following, local overheating on horses. Inflammations and lameness are further problems which can be detected with the help of thermography.

The Infratec range of cameras are well equipped to handle the demands for high thermal resolution to give precise measurements that other brands are not able to provide. One such application can be seen in the research article on Evaluation of thermal pattern distributions in racehorse saddles using infrared thermography.

View Research Article