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Thermal imaging, it’s still evolving

Published: 12 July 2012 - Heather Ramsden

Thermal imaging has certainly proved its worth across industry and the continuing high demand for cameras is testimony to that. But where does the technology go from here? Andrew Baker, UK and Ireland sales manager for Flir Systems says an important area of development is related to how widely thermal imaging cameras are being used.

For most, a thermal imaging camera is an essential piece of kit that is used daily, not just housed in a cupboard for an occasional inspection. This means it must be fit for purpose and designed to withstand the rigors of industrial environments.  As a result new cameras are becoming much more robust than their forerunners and subjected to stringent drop tests to confirm their durability.

Upgrade path

The choice of models in terms of camera performance and dedicated applications features has never been greater. There is now a model on the market to suit every level of sophistication and analysis and reporting needs.  This is important because as users work with the technology they naturally discover new applications for it. 

So, for example, even though an engineer may start with a fixed lens model, the benefits of having interchangeable lenses for various applications will become apparent. And there is a wealth of choice enabling users to upgrade their cameras in line with their evolving experience and expertise.

Software choice

The parallel development of analysis and reporting software is also of significant importance. Again the choice for asset maintenance is fulsome and starts with simple products that allow users to organise and analyse radiometric images on the camera and quickly present them in a report. Intuitive and easy-to-use online tools are also available for the same purpose.

Further up the scale are systems that incorporate features such as fusion, trending and provide greater flexibility in report design and layout. And for the professional thermographer dedicated software allows advanced analysis of systems and structures. An energy cost comparison report is one example that allows the easy calculation of achievable cost savings when the identified structural problems are fixed. 

Even more functions

Complementing the breadth of choice is the continuous development of various camera grades. Even entry level models now incorporate some highly sophisticated features. The cost of a basic troubleshooting model makes it affordable across all engineering disciplines and the performance of these cameras get better and better.

A good example is the inclusion of wireless technology in thermal imaging camera design. This provides significant application scope as it allows data from a WiFi enabled moisture meter or clamp meter to be transferred to the corresponding thermal image.  So, for example, the relationship between heat and power load can be seen, bringing more intelligence to the inspection process.

This technology also allows thermal imaging cameras to ‘talk’ to mobile devices such as an iPhone and iPad.  The result is far greater application flexibility as it allows images to be shared with colleagues, so that swift decisions can be taken on the remedial action needed to prevent loss of production or minimise risk.

New applications

Thermal imaging is also proving ideal for the maintenance of renewable energy plant. A brake or a gearbox ­failure in a wind turbine can be catastrophic. Uncontrolled speed of rotation imposes excess loads on the blades and can result in a fracture with life threatening consequences. Increasingly ­thermal imaging is being used for ­preventative maintenance of these vital components.

The technology is able to pinpoint the exact component whose thermal profile indicates an impending fault.  It is therefore a reliable, quick and efficient method of spotting signs of wear on all manner of mechanical components as well as electrical elements such as transformers, connectors and controllers.

Important caveat

The entry cost to the technology continues to fall and this is attracting more potential users.  But whilst this is a positive development, it puts even more emphasis on the need for training. Thermal imaging cameras may be getting smarter but that is no substitute for the user fully comprehending the science behind the technology. 

Knowing the principles of infrared is a vital part of getting the best return on the camera investment. So at the very least, attend a course that covers the basics and better still, become a Level 1 thermographer.

 

Flir Systems

T: 01732 220011

www.flir.com

Industry Connections: Flir Systems Ltd


 
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